diff --git a/lit-bridge/.env.example b/lit-bridge/.env.example new file mode 100644 index 00000000..e34f5233 --- /dev/null +++ b/lit-bridge/.env.example @@ -0,0 +1,125 @@ +# =========================================================================== +# REQUIRED for setup + deploy — fill these in before running the setup script +# =========================================================================== + +# Your ACCOUNT-LEVEL (master) Lit API key — the one issued when you first +# created the account, not a scoped usage key. Setup calls management endpoints +# (create account/PKP, add_action, add_group) that reject scoped keys. Get it +# from https://dashboard.chipotle.litprotocol.com. +LIT_API_KEY= + +# EOA used to deploy BridgeConfigRegistry (on Base Sepolia) and BridgeToken on +# BOTH Base Sepolia and Arbitrum Sepolia, and to wire bridge partners. Needs gas +# on both chains — grab Sepolia ETH from a faucet and bridge a little to Arb +# Sepolia. NEVER commit the filled-in .env (it's gitignored). +DEPLOYER_PRIVATE_KEY= + +# Raw provider API keys (NOT full URLs). The action constructs the hostname for +# each chain from a code-resident map and only the key is secret — so setup +# encrypts JUST these against the bridge signing account and stores the +# ciphertext in the registry. Each default chain ships with both, giving the +# recommended quorum of 2 (a single lying RPC can't forge a mint). +# Alchemy: https://dashboard.alchemy.com (enable Base + Arb Sepolia) +# Infura: https://developer.metamask.io (enable Base + Arb Sepolia) +ALCHEMY_API_KEY= +INFURA_API_KEY= + + +# =========================================================================== +# Defaults — change only if you know why +# =========================================================================== +# +# (The lit-bridge service itself is stateless — no database. All bridge state +# lives on-chain: burns are BurnInitiated events, completions are usedBurnIds / +# BridgeMint on the destination. The service just hosts the UI + a config +# endpoint, so it needs no secrets to run.) + +LIT_API_BASE=https://api.chipotle.litprotocol.com + +# Chain where BridgeConfigRegistry lives (the control plane). Base Sepolia for +# the demo; Base mainnet (8453) in production. +REGISTRY_CHAIN_ID=84532 + +# Broadcast RPCs used by forge to deploy + send txs. These do NOT need to be +# keyed — the public endpoints work. The action's *verification* reads go +# through the encrypted Alchemy/Infura keys above; these just broadcast. +BASE_SEPOLIA_RPC_URL=https://sepolia.base.org +ARBITRUM_SEPOLIA_RPC_URL=https://sepolia-rollup.arbitrum.io/rpc + +# Per-chain config written into the registry by setup. Quorum 2 = both the +# Alchemy and Infura reads must agree. minConfirmations is floored in the action +# code regardless, so lowering it below the floor has no effect. +CHAIN_QUORUM=2 +MIN_CONFIRMATIONS=5 + +# Bridge fee (option 1 — token skim). On mint, the destination token mints +# (feeFlat + amount*feeBps/10000) to FEE_TREASURY and the remainder to the +# recipient. Set FEE_TREASURY empty to default to the deployer. feeBps is capped +# at 500 (5%) on-chain. The skimmed token accrues in the treasury; converting it +# to gas to refill the oracle is a later, off-chain concern. +FEE_TREASURY= +FEE_FLAT=0 +FEE_BPS=10 + +# Registry owner. Defaults to the deployer EOA for dev; set to the Base Safe in +# production, then it governs all config writes (two-step transfer). +REGISTRY_OWNER= + +# Phase 6 governance: the Base Safe that will own the registry, both tokens, the +# fee treasury, and (chain-secured) the signing account. Used by handoffToSafe.js. +SAFE_ADDRESS= + +# Demo token constructor args. Initial supply is minted only on +# INITIAL_SUPPLY_NETWORK; the other chain starts at zero and gets tokens by +# bridging. +TOKEN_NAME=Bridge Coin +TOKEN_SYMBOL=BRDG +INITIAL_SUPPLY=1000000 +INITIAL_SUPPLY_NETWORK=baseSepolia + +# Public base URL the service advertises (used in UI / API responses). +PUBLIC_BASE_URL=http://localhost:8000 + +# Chains shown in the bridging UI (GET /api/config). A JSON array of +# {chain_id, name, rpc, token, explorer}: `rpc` is a PUBLIC read endpoint the +# browser hits for balances/gas/usedBurnIds, `token` is the BridgeToken address +# on that chain, `explorer` is the block explorer base URL (for tx links). The +# UI's bridge form is hidden until at least two chains are listed. +# ⚠ NO SECRETS: every field here is served verbatim to the browser and the +# `rpc` is fetched client-side, so it MUST be a public, unauthenticated +# endpoint — never an Alchemy/Infura/keyed URL (that key would be exposed to +# every visitor). Use the public RPCs (mainnet.base.org, arb1.arbitrum.io). +# ⚠ SAME NATIVE ASSET: only list chains that share a native token (all +# ETH-native L2s today). The relayer's auto-mint compares prepaid wei to +# destination-gas wei 1:1, so a cross-native pair (e.g. an ETH chain + +# Polygon) burns fine in the UI but never auto-relays. See +# docs/bringing-a-token-to-new-chains.md ("Same native asset"). +# Example: +# CHAINS_JSON=[{"chain_id":8453,"name":"Base","rpc":"https://mainnet.base.org","token":"0xYourBaseToken","explorer":"https://basescan.org"},{"chain_id":42161,"name":"Arbitrum","rpc":"https://arb1.arbitrum.io/rpc","token":"0xYourArbToken","explorer":"https://arbiscan.io"}] +CHAINS_JSON= + + +# =========================================================================== +# Auto-filled by setup — leave blank, the script populates them (and injects +# BRIDGE_PKP_ID + REGISTRY_ADDRESS into action/bridgeAction.js before pinning +# the CID) +# =========================================================================== + +# Dedicated signing account (Option B). Its ADDRESS is the oracle every +# BridgeToken trusts — stable across action logic upgrades. +BRIDGE_PKP_ID= +ORACLE_ADDRESS= + +# Deployed BridgeConfigRegistry address on the registry chain. +REGISTRY_ADDRESS= + +# The action's IPFS CID + the group/usage key authorizing it to run and to +# decrypt the registry's RPC secrets. Usage key is shown ONCE by the server; +# re-running setup mints a fresh one and overwrites this line. +ACTION_IPFS_CID= +GROUP_ID= +LIT_USAGE_API_KEY= + +# Deployed BridgeToken addresses per chain. +BRIDGE_TOKEN_BASE_SEPOLIA= +BRIDGE_TOKEN_ARB_SEPOLIA= diff --git a/lit-bridge/.gitignore b/lit-bridge/.gitignore new file mode 100644 index 00000000..432c1825 --- /dev/null +++ b/lit-bridge/.gitignore @@ -0,0 +1,6 @@ +/target +.env +.env.* +!.env.example +scripts/node_modules +action/bridgeAction.built.js diff --git a/lit-bridge/Cargo.lock b/lit-bridge/Cargo.lock new file mode 100644 index 00000000..3a9506ae --- /dev/null +++ b/lit-bridge/Cargo.lock @@ -0,0 +1,1719 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 4 + +[[package]] +name = "aho-corasick" +version = "1.1.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ddd31a130427c27518df266943a5308ed92d4b226cc639f5a8f1002816174301" +dependencies = [ + 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"Permissionless cross-chain token bridge: hosted bridging UI + verification oracle (action/) + config registry (contracts/). Stateless — bridge state lives on-chain." +license = "Apache-2.0" + +[dependencies] +anyhow = "1.0" +rocket = { version = "0.5.1", features = ["json"] } +serde = { version = "1.0", features = ["derive"] } +serde_json = "1.0" +tokio = { version = "1", features = ["full"] } +tracing = "0.1" +tracing-subscriber = { version = "0.3", features = ["env-filter"] } diff --git a/lit-bridge/Dockerfile b/lit-bridge/Dockerfile new file mode 100644 index 00000000..a283230b --- /dev/null +++ b/lit-bridge/Dockerfile @@ -0,0 +1,31 @@ +# Dockerfile for lit-bridge. +# +# Build context: the REPO ROOT (matches the other services' Railway config). +# lit-bridge has no path-dependency on sibling crates, so it only needs itself. + +# ── Build stage ──────────────────────────────────────────────────────────── +FROM rust:1.91-slim-bookworm AS builder + +RUN apt-get update \ + && apt-get install -y --no-install-recommends pkg-config libssl-dev ca-certificates \ + && rm -rf /var/lib/apt/lists/* + +WORKDIR /build +COPY lit-bridge ./lit-bridge + +WORKDIR /build/lit-bridge +RUN cargo build --release --bin lit-bridge + +# ── Runtime stage ────────────────────────────────────────────────────────── +FROM debian:bookworm-slim + +RUN apt-get update \ + && apt-get install -y --no-install-recommends ca-certificates libssl3 \ + && rm -rf /var/lib/apt/lists/* + +WORKDIR /app +COPY --from=builder /build/lit-bridge/target/release/lit-bridge /app/lit-bridge +COPY lit-bridge/static ./static + +ENV RUST_LOG=info +ENTRYPOINT ["/app/lit-bridge"] diff --git a/lit-bridge/README.md b/lit-bridge/README.md new file mode 100644 index 00000000..d7bad047 --- /dev/null +++ b/lit-bridge/README.md @@ -0,0 +1,154 @@ +# lit-bridge + +Permissionless cross-chain token bridge — the same product shape as Hyperlane +Warp Routes, but the verification layer is a content-addressed Lit Action that +reads the source chain directly (over N independent RPCs, with quorum) instead +of a validator set. No validators to bootstrap per route or per chain. + +See **`plans/hyperlane-competitor.md`** for the full design, trust model, and +phased roadmap. This crate is the productized artifact (it replaces the old +`examples/cross-chain-token` reference). + +## Layout + +``` +lit-bridge/ + src/ Rocket service: bridging UI host + /api/config (stateless) + static/ web UI (index.html + bridge.js + style.css) + action/ the bridge verification Lit Action + its unit tests + contracts/ Foundry: BridgeConfigRegistry (control plane) + BridgeToken + Dockerfile repo-root build context; deployed to Railway + railway.json +``` + +**Stateless by design** — there is no database. All bridge state lives on-chain: +a pending transfer is a `BurnInitiated` event; a completed one is +`usedBurnIds[burnId] == true` + `BridgeMint` on the destination. The UI reads +that directly. If we later want a fast explorer (cached log scans, analytics), +it's a separate indexer over chain events — a rebuildable cache, not a +dependency of the core service. + +## The trust layer (action/) + +`action/bridgeAction.js` is the oracle. It: + +1. Reads per-chain RPC config from the on-chain **BridgeConfigRegistry** (so + adding a chain is a governed config write, not a source edit that would + rotate this action's CID). The only things pinned in code are the registry's + address + the host allowlist used to read it. +2. Decrypts each RPC secret in-TEE. For `alchemy`/`infura` the hostname is built + from a code-resident map (config can't redirect those reads); for `custom` + the registry stores a plaintext host + an encrypted URL and the action + asserts they agree. +3. Fetches the burn facts from **N independent RPCs and requires M-of-N + agreement** (quorum; floor 1, default 2). A single lying RPC can't forge a + mint. +4. Signs the mint authorization with a **dedicated account** (Option B) governed + by the Base Safe — so action logic can be upgraded without rotating the + oracle address every BridgeToken trusts. + +Run the action's unit tests (pure logic — consensus, provider URLs, registry +host allowlist, finality floor; no secrets needed): + +```sh +cd action && node --test +``` + +## Contracts (Foundry) + +```sh +cd contracts +forge build # auto-installs forge-std; OpenZeppelin via npm (npm i) +forge test +``` + +- `BridgeConfigRegistry.sol` — owner-governed (Base Safe, two-step) per-chain RPC + config + quorum. Secrets stored encrypted; hostnames for alchemy/infura never + stored (constructed in the action). +- `BridgeToken.sol` — burn/mint cross-chain ERC-20 trusting an immutable oracle + address. + +Deploy (needs `DEPLOYER_PRIVATE_KEY`, funded on the target chain): + +```sh +# Registry on Base (set REGISTRY_OWNER to the Safe in prod) +forge script script/Deploy.s.sol:DeployRegistry --rpc-url $BASE_SEPOLIA_RPC_URL --broadcast +# A token per chain (ORACLE_ADDRESS = the bridge signing account) +ORACLE_ADDRESS=0x... forge script script/Deploy.s.sol:DeployToken --rpc-url $RPC_URL --broadcast +``` + +## Service (Rust / Rocket) + +```sh +cargo run # no secrets needed; stateless +``` + +Endpoints: `GET /health`, `GET /` (UI), `GET /api/config` (registry chain + +address, fee, and the bridgeable chains the UI bootstraps from). + +The UI (`static/`) is **wallet-direct**: it loads ethers from a CDN, reads the +chain list from `/api/config`, connects the user's wallet, and calls +`BridgeToken.burn(amount, destChainId, recipient)` straight from the browser — +attaching the relayer gas prepay (`destGasPrice × 300000 × 2`) as `value` so the +mint is auto-relayed. It then watches `usedBurnIds(burnId)` on the destination to +show completion. The service stores nothing; it just serves the page and the +config. Populate the UI by setting **`CHAINS_JSON`** (a JSON array of +`{chain_id,name,rpc,token,explorer}`; see `.env.example`) plus `TOKEN_SYMBOL` / +`FEE_BPS`; with fewer than two chains the form shows a "not configured" state. + +## Relayer (automation) + +In relay mode the action doesn't just sign — it **broadcasts the mint itself** +from the oracle account (fund it with gas via `scripts/fundPkp.js`). A +`lit-triggers` `chain_event` trigger watches `BurnInitiated` on each token and +runs the action, so burns auto-mint on the other side. The relay logic is +proven directly (no triggers instance needed) by: + +```sh +cd scripts && node relay.js --amount 10 # burn -> action verifies, signs, AND mints +``` + +To wire the production trigger (needs a running lit-triggers instance with +`BASE_SEPOLIA_RPC_URL` / `ARBITRUM_SEPOLIA_RPC_URL` set, and an agent token from +its magic-link auth flow): + +```sh +TRIGGERS_BASE=... TRIGGERS_AGENT_TOKEN=... node registerTriggers.js +``` + +(lit-triggers' `CHAIN_SPECS` now include `base-sepolia` / `arbitrum-sepolia`.) + +The trigger fires once per burn, so run **`scripts/retryPoller.js`** continuously +(`--once` via cron, or a managed process): it scans recent `BurnInitiated` events, +checks `usedBurnIds` on the destination, and re-relays anything un-minted (a burn +that wasn't final or hit a flaky RPC when the trigger fired). Idempotent — the +on-chain replay guard makes over-running safe. + +## Bringing a token to new chains + +Token issuers: see **[`docs/bringing-a-token-to-new-chains.md`](docs/bringing-a-token-to-new-chains.md)** +— how to launch a cross-chain token (your own oracle/registry/relayer via +`setup.js`), add chains, the quorum/finality/same-native caveats, and what's not +built yet (wrapping an *existing* token needs the router contracts). + +## Upgrades & governance + +The signing account is chain-secured and the registry + tokens are owned by the +Base Safe. Shipping a new action or changing config is a **Safe-governed** flow +(re-pin the action CID / propose the owner write, then the Safe owner executes). +Don't wing it — follow **[`docs/upgrading-the-action.md`](docs/upgrading-the-action.md)** +(it has the exact runbook, addresses, and the `GS013` / master-vs-alias-hash +gotcha that bites otherwise). `scripts/proposeRepin.js` automates the propose step. + +## Status + +Live on **Base + Arbitrum mainnet**, confirmed end-to-end (manual transfer +**and** auto-relay), with the fee skim + native gas prepay validated on-chain and +the codex-review action fixes deployed. The registry is owned by the Base Safe +and the signing account is chain-secured to it (governance handoff done). The +wallet-direct bridging UI ships in `static/`. + +Still to do: the full Alchemy ∩ Infura default chain set, the +treasury→gas conversion loop (deferred until real usage; done manually for now), +and the collateral/synthetic *router* contracts needed to wrap an existing token +(today only native burn/mint `BridgeToken`s are supported). diff --git a/lit-bridge/action/bridgeAction.js b/lit-bridge/action/bridgeAction.js new file mode 100644 index 00000000..528d8a58 --- /dev/null +++ b/lit-bridge/action/bridgeAction.js @@ -0,0 +1,487 @@ +// Lit Action: the lit-bridge verification oracle + relayer. +// +// Permissionless half of a burn/mint cross-chain token. Two modes: +// * Manual (sign-only): called with explicit params, returns a signature +// anyone can submit to BridgeToken.mint on the destination chain. +// * Relay (auto-broadcast): a lit-triggers chain_event trigger fires this on +// each BurnInitiated; it re-verifies, signs, AND broadcasts the mint from +// the oracle account (paying gas), only if the burn prepaid enough gas. +// +// Hardened after an adversarial review (see plans/hyperlane-competitor.md): +// #1 the registry read itself requires M-of-N (>=2) distinct providers — a +// single lying bootstrap RPC can no longer define the source config. +// #2/#5 the destination contract is resolved from the SOURCE token's +// governance-pinned `bridgePartner[destChainId]` under consensus, never +// from caller params; the relay gas cap == the prepay-quote gas, so the +// oracle can never be made to spend more than was prepaid. +// #3 auto-relay only between chains with the same native asset (the prepay +// wei comparison is otherwise meaningless). +// #4 (partial) confirmation depth is the registry's per-chain, Safe-governed +// `minConfirmations` over a floor; true `finalized`-tag finality needs a +// retry poller (incompatible with the single-fire trigger) — follow-up. +// #6 only distinct provider hosts count toward quorum. +// #7 the destination RPC is chain-id-checked and tried in order. +// +// What's pinned in code (the trust root): REGISTRY_ADDRESS/CHAIN_ID, the +// registry-read host allowlist, BRIDGE_PKP_ID, provider host maps, finality + +// gas + quorum floors, the native-asset map, and the consensus rules. + +// ── Trust root ────────────────────────────────────────────────────────────── +const REGISTRY_CHAIN_ID = 8453; // Base mainnet +const REGISTRY_ADDRESS = "0x0000000000000000000000000000000000000000"; // set at deploy + +// Keyless public Base endpoints for the bootstrap registry read (+ the keyed +// providers if ever passed). Several are listed for redundancy: the read needs +// REGISTRY_READ_QUORUM of them to AGREE, so passing 3 reliable ones tolerates +// one flaking/rate-limiting under burst (which is why 2 wasn't enough). +const REGISTRY_RPC_HOSTS = [ + /^base-mainnet\.g\.alchemy\.com$/i, + /^base-mainnet\.infura\.io$/i, + /^mainnet\.base\.org$/i, + /^base-rpc\.publicnode\.com$/i, + /^1rpc\.io$/i, + /^gateway\.tenderly\.co$/i, +]; +// #1: the bootstrap registry read is itself M-of-N. Distinct hosts required. +const REGISTRY_READ_QUORUM = 2; + +const BRIDGE_PKP_ID = "REPLACE_WITH_PKP_ID"; + +const MIN_CONFIRMATIONS_FLOOR = 2; +// #2: one gas number for BOTH the prepay check and the actual mint tx cap, so +// the oracle can never be billed for more gas than the burn prepaid. +const MINT_GAS_LIMIT = 300000; +const RELAY_DEADLINE_SECS = 3600; + +const RPC_TYPE = { ALCHEMY: 0, INFURA: 1, CUSTOM: 2 }; + +// #3: chains whose native gas token is ETH. Auto-relay (which compares prepay +// wei to dest-gas wei 1:1) is only allowed between two of these. +const ETH_NATIVE_CHAINS = new Set([1, 10, 8453, 42161, 11155111, 84532, 421614]); + +const ALCHEMY_SUBDOMAINS = { + 1: "eth-mainnet", 8453: "base-mainnet", 42161: "arb-mainnet", 10: "opt-mainnet", + 137: "polygon-mainnet", 84532: "base-sepolia", 421614: "arb-sepolia", 11155111: "eth-sepolia", +}; +const INFURA_NETWORKS = { + 1: "mainnet", 8453: "base-mainnet", 42161: "arbitrum-mainnet", 10: "optimism-mainnet", + 137: "polygon-mainnet", 84532: "base-sepolia", 421614: "arbitrum-sepolia", 11155111: "sepolia", +}; + +const BURN_TOPIC = "BurnInitiated(address,address,uint256,uint256,uint256,uint256)"; +const MINT_ABI = + "function mint(uint256 srcChainId,address srcContract,bytes32 burnTxHash,uint256 logIndex,address recipient,uint256 amount,uint256 srcNonce,uint256 deadline,bytes signature)"; +const PARTNER_ABI = "function bridgePartner(uint256) view returns (address)"; + +// ── Pure helpers (unit tested) ─────────────────────────────────────────────── + +function buildRpcUrl(entry, chainId, decryptedSecret) { + const cid = Number(chainId); + if (entry.rpcType === RPC_TYPE.ALCHEMY) { + const sub = ALCHEMY_SUBDOMAINS[cid]; + if (!sub) return { ok: false, reason: `no alchemy subdomain for chain ${cid}` }; + return { ok: true, url: `https://${sub}.g.alchemy.com/v2/${decryptedSecret}` }; + } + if (entry.rpcType === RPC_TYPE.INFURA) { + const net = INFURA_NETWORKS[cid]; + if (!net) return { ok: false, reason: `no infura network for chain ${cid}` }; + return { ok: true, url: `https://${net}.infura.io/v3/${decryptedSecret}` }; + } + if (entry.rpcType === RPC_TYPE.CUSTOM) { + let parsed; + try { + parsed = new URL(decryptedSecret); + } catch { + return { ok: false, reason: "custom rpc decrypted to an invalid URL" }; + } + if (parsed.protocol !== "https:") { + return { ok: false, reason: `custom rpc must be https (got ${parsed.protocol})` }; + } + if (!entry.host || parsed.hostname.toLowerCase() !== entry.host.toLowerCase()) { + return { ok: false, reason: `custom rpc host ${parsed.hostname} != registry host ${entry.host}` }; + } + return { ok: true, url: decryptedSecret }; + } + return { ok: false, reason: `unknown rpc type ${entry.rpcType}` }; +} + +function checkRegistryRpcUrl(url) { + let parsed; + try { + parsed = new URL(url); + } catch { + return { ok: false, reason: "registryRpcUrl is not a valid URL" }; + } + if (parsed.protocol !== "https:") { + return { ok: false, reason: `registryRpcUrl must be https (got ${parsed.protocol})` }; + } + if (!REGISTRY_RPC_HOSTS.some((re) => re.test(parsed.hostname))) { + return { ok: false, reason: `registryRpcUrl host ${parsed.hostname} not allowlisted` }; + } + return { ok: true }; +} + +/// #6: count distinct hostnames among a set of URLs (only distinct providers +/// count toward quorum — two URLs on the same host are one trust root). Pure. +function distinctHostCount(urls) { + const hosts = new Set(); + for (const u of urls) { + try { + hosts.add(new URL(u).hostname.toLowerCase()); + } catch { + /* skip invalid */ + } + } + return hosts.size; +} + +/// #3: may these two chains auto-relay? Only if both are ETH-native, so the +/// prepay-vs-dest-gas wei comparison is apples-to-apples. Pure. +function sameNative(srcChainId, destChainId) { + return ETH_NATIVE_CHAINS.has(Number(srcChainId)) && ETH_NATIVE_CHAINS.has(Number(destChainId)); +} + +function canonicalize(value) { + if (Array.isArray(value)) return "[" + value.map(canonicalize).join(",") + "]"; + if (value && typeof value === "object") { + const keys = Object.keys(value).sort(); + return "{" + keys.map((k) => JSON.stringify(k) + ":" + canonicalize(value[k])).join(",") + "}"; + } + return JSON.stringify(value); +} + +function criticalFacts({ status, blockNumber, logAddress, topics, data, destPartner }) { + return { + status: String(BigInt(status)), + blockNumber: String(BigInt(blockNumber)), + logAddress: String(logAddress).toLowerCase(), + topics: (topics || []).map((t) => String(t).toLowerCase()), + data: String(data).toLowerCase(), + destPartner: String(destPartner).toLowerCase(), + }; +} + +function tallyConsensus(votes, quorum) { + const q = Math.max(1, Number(quorum) || 1); + const groups = new Map(); + let counted = 0; + for (const v of votes) { + if (!v || !v.ok) continue; + counted++; + const key = canonicalize(v.facts); + const g = groups.get(key); + if (g) g.count++; + else groups.set(key, { count: 1, facts: v.facts }); + } + if (counted < q) { + return { agreed: false, reason: `only ${counted} provider(s) voted; need quorum ${q}` }; + } + let best = null; + for (const g of groups.values()) if (!best || g.count > best.count) best = g; + if (!best || best.count < q) { + return { + agreed: false, + reason: `no set of facts reached quorum ${q} (best agreement: ${best ? best.count : 0} of ${counted})`, + }; + } + return { agreed: true, facts: best.facts }; +} + +function effectiveMinConfirmations(registryMinConf) { + return Math.max(MIN_CONFIRMATIONS_FLOOR, Number(registryMinConf) || 0); +} + +function gasPrepaySufficient(gasPrepaid, destGasPrice, gasLimit) { + return BigInt(gasPrepaid.toString()) >= BigInt(destGasPrice.toString()) * BigInt(gasLimit); +} + +function mapEventToInputs(event) { + if (!event || typeof event !== "object") { + return { ok: false, reason: "relay mode: missing event" }; + } + const srcChainId = event.chain_id; + const burnTxHash = event.transaction_hash; + const srcContract = event.contract_address || event.address; + const logIndex = event.log_index; + if (srcChainId == null || !burnTxHash || !srcContract || logIndex == null) { + return { ok: false, reason: "relay mode: event missing chain_id/transaction_hash/contract/log_index" }; + } + return { ok: true, srcChainId, burnTxHash, srcContract, logIndex }; +} + +// ── Orchestration ──────────────────────────────────────────────────────────── + +async function main(params) { + if (REGISTRY_ADDRESS === "0x0000000000000000000000000000000000000000") { + return { authorized: false, reason: "REGISTRY_ADDRESS not configured" }; + } + const relay = params.source === "chain_event" || !!params.event; + + // ---- 0. Verification inputs (manual params vs relay event) --------------- + let srcChainId, burnTxHash, srcContract, logIndex; + if (relay) { + const m = mapEventToInputs(params.event); + if (!m.ok) return { authorized: false, reason: m.reason }; + ({ srcChainId, burnTxHash, srcContract, logIndex } = m); + } else { + ({ burnTxHash, srcChainId, srcContract, logIndex } = params); + if (!burnTxHash || srcChainId == null || !srcContract || logIndex == null) { + return { authorized: false, reason: "manual mode: missing burnTxHash/srcChainId/srcContract/logIndex" }; + } + } + + // ---- 1. Registry-read RPCs: allowlisted + >= quorum DISTINCT hosts (#1,#6)- + const regUrls = Array.isArray(params.registryRpcUrls) ? params.registryRpcUrls : []; + for (const u of regUrls) { + const ok = checkRegistryRpcUrl(u); + if (!ok.ok) return { authorized: false, reason: ok.reason }; + } + if (distinctHostCount(regUrls) < REGISTRY_READ_QUORUM) { + return { + authorized: false, + reason: `need >= ${REGISTRY_READ_QUORUM} distinct registry RPC hosts, got ${distinctHostCount(regUrls)}`, + }; + } + + // ---- 2. Read source config (consensus) + decrypt + dedupe hosts (#1,#6) -- + const cfg = await readChainConfig(regUrls, srcChainId); + if (!cfg.ok) return { authorized: false, reason: cfg.reason }; + const minConf = effectiveMinConfirmations(cfg.minConfirmations); + const quorum = Math.max(1, Number(cfg.quorum) || 1); + const urls = []; + for (const entry of cfg.rpcs) { + const secret = await Lit.Actions.Decrypt({ pkpId: BRIDGE_PKP_ID, ciphertext: entry.encSecret }); + const built = buildRpcUrl(entry, srcChainId, secret); + if (!built.ok) return { authorized: false, reason: built.reason }; + urls.push(built.url); + } + if (distinctHostCount(urls) < quorum) { + return { + authorized: false, + reason: `chain ${srcChainId}: ${distinctHostCount(urls)} distinct rpc host(s) < quorum ${quorum}`, + }; + } + + // ---- 3. M-of-N consensus on the burn (finality + dest partner) (#4,#5) --- + const idx = Number(logIndex); + const partnerIface = new ethers.utils.Interface([PARTNER_ABI]); + const votes = await Promise.all( + urls.map((url) => collectBurnFacts(url, srcChainId, srcContract, burnTxHash, idx, minConf, partnerIface)) + ); + const consensus = tallyConsensus(votes, quorum); + if (!consensus.agreed) return { authorized: false, reason: consensus.reason }; + const facts = consensus.facts; + + // ---- 4. Decode the agreed log ------------------------------------------- + // (logAddress / topic0 already validated per-provider in collectBurnFacts.) + const recipient = ethers.utils.getAddress("0x" + facts.topics[2].slice(26)); + const destChainId = Number(BigInt(facts.topics[3])); + const decoded = ethers.utils.defaultAbiCoder.decode(["uint256", "uint256", "uint256"], facts.data); + const amount = decoded[0]; + const srcNonce = decoded[1]; + const gasPrepaid = decoded[2]; + + // ---- 5. Destination is the governance-pinned partner, not caller input (#2,#5) + if (!facts.destPartner || /^0x0+$/.test(facts.destPartner)) { + return { authorized: false, reason: `source token has no bridgePartner for dest chain ${destChainId}` }; + } + const destContract = ethers.utils.getAddress(facts.destPartner); + if (destChainId === Number(srcChainId)) { + return { authorized: false, reason: "src and dest chain are the same" }; + } + + // ---- 6. Resolve deadline + gas gate (relay) ------------------------------ + let deadline, destRpcUrl; + if (relay) { + if (!sameNative(srcChainId, destChainId)) { + return { authorized: false, reason: `auto-relay only between same-native chains (src ${srcChainId}, dest ${destChainId})` }; + } + const destPick = await pickDestRpc(regUrls, destChainId); + if (!destPick.ok) return { authorized: false, reason: destPick.reason }; + destRpcUrl = destPick.url; + const block = await rpc(destRpcUrl, "eth_getBlockByNumber", ["latest", false]); + deadline = Number(BigInt(block.timestamp)) + RELAY_DEADLINE_SECS; + // #2: prepay must cover the SAME gas the mint tx is capped at. + const destGasPrice = BigInt(await rpc(destRpcUrl, "eth_gasPrice", [])); + if (!gasPrepaySufficient(gasPrepaid, destGasPrice, MINT_GAS_LIMIT)) { + return { + authorized: false, + reason: `insufficient gas prepay: have ${gasPrepaid.toString()} wei, need ${(destGasPrice * BigInt(MINT_GAS_LIMIT)).toString()} wei (not auto-relayed; holder can self-submit)`, + }; + } + } else { + deadline = params.deadline; + if (deadline == null) return { authorized: false, reason: "manual mode: deadline required" }; + } + + // ---- 7. Sign (Option B: dedicated account) ------------------------------- + const digest = ethers.utils.keccak256( + ethers.utils.defaultAbiCoder.encode( + ["uint256", "address", "bytes32", "uint256", "address", "uint256", "uint256", "uint256", "address", "uint256"], + [srcChainId, srcContract, burnTxHash, idx, recipient, amount, srcNonce, deadline, destContract, destChainId] + ) + ); + const wallet = new ethers.Wallet(await Lit.Actions.getPrivateKey({ pkpId: BRIDGE_PKP_ID })); + const signature = await wallet.signMessage(ethers.utils.arrayify(digest)); + + const base = { + authorized: true, signer: wallet.address, srcChainId, srcContract, burnTxHash, + logIndex: idx, recipient, amount: amount.toString(), srcNonce: srcNonce.toString(), + destChainId, destContract, deadline, signature, quorum, + }; + + // ---- 8. Manual: return signature. Relay: broadcast the mint (#2 capped). -- + if (!relay) return base; + if (params.dryRun) return { ...base, dryRun: true }; + + const data = new ethers.utils.Interface([MINT_ABI]).encodeFunctionData("mint", [ + srcChainId, srcContract, burnTxHash, idx, recipient, amount, srcNonce, deadline, signature, + ]); + const signer = wallet.connect(new ethers.providers.JsonRpcProvider(destRpcUrl)); + const tx = await signer.sendTransaction({ + to: destContract, + data, + gasLimit: ethers.BigNumber.from(MINT_GAS_LIMIT), // == the gas the prepay covered + }); + const rcpt = await tx.wait(); + return { ...base, minted: true, mintTxHash: rcpt.transactionHash, mintBlock: rcpt.blockNumber }; +} + +async function readChainConfig(regUrls, chainId) { + const iface = new ethers.utils.Interface([ + "function getChain(uint256) view returns (bool exists, uint64 minConfirmations, uint8 quorum, uint256 rpcCount)", + "function getRpc(uint256 chainId, uint256 index) view returns (uint8 rpcType, string host, string encSecret)", + ]); + const reads = await Promise.all(regUrls.map((url) => readChainConfigFrom(url, iface, chainId))); + const consensus = tallyConsensus(reads, REGISTRY_READ_QUORUM); + if (!consensus.agreed) return { ok: false, reason: `registry read: ${consensus.reason}` }; + const c = consensus.facts; + if (!c.exists) return { ok: false, reason: `chain ${chainId} not configured in registry` }; + return { ok: true, minConfirmations: c.minConfirmations, quorum: c.quorum, rpcs: c.rpcs }; +} + +async function readChainConfigFrom(url, iface, chainId) { + try { + const head = await ethCallTo(url, REGISTRY_ADDRESS, iface, "getChain", [chainId]); + if (!head[0]) return { ok: true, facts: { exists: false } }; + const rpcCount = Number(head[3]); + const rpcs = []; + for (let i = 0; i < rpcCount; i++) { + const r = await ethCallTo(url, REGISTRY_ADDRESS, iface, "getRpc", [chainId, i]); + rpcs.push({ rpcType: Number(r[0]), host: String(r[1]), encSecret: String(r[2]) }); + } + return { ok: true, facts: { exists: true, minConfirmations: head[1].toString(), quorum: Number(head[2]), rpcs } }; + } catch (e) { + return { ok: false, reason: `registry read from one rpc failed: ${e.message}` }; + } +} + +/// One provider's vote: chain id, receipt, FINALITY (#4), the target log, and +/// the governance-pinned destination partner (#5) — all under consensus. +async function collectBurnFacts(url, srcChainId, srcContract, burnTxHash, logIndex, minConf, partnerIface) { + try { + const reportedChainId = await rpc(url, "eth_chainId", []); + if (BigInt(reportedChainId) !== BigInt(srcChainId)) { + return { ok: false, reason: `rpc reports chain ${BigInt(reportedChainId)}` }; + } + const receipt = await rpc(url, "eth_getTransactionReceipt", [burnTxHash]); + if (!receipt) return { ok: false, reason: "burn tx not found" }; + if (BigInt(receipt.status) !== 1n) return { ok: false, reason: "burn tx reverted" }; + const burnBlock = BigInt(receipt.blockNumber); + + // #4 (partial): require `minConf` confirmations, where minConf is the + // registry's per-chain value (Safe-governed) over a code floor. The Safe + // should set this to a finality-appropriate depth per chain. NOTE: a true + // `finalized`-tag gate (L1 finality) is the correct end state but conflicts + // with the lit-triggers single-fire model (it fires ~once at a fixed depth + // and never retries, so a not-yet-finalized burn would fail permanently). + // The full fix is a retry poller for un-minted-but-now-final burns — tracked + // as follow-up. Manual mode callers can simply wait for finality themselves. + const head = BigInt(await rpc(url, "eth_blockNumber", [])); + if (head - burnBlock < BigInt(minConf)) return { ok: false, reason: "below min confirmations" }; + + const log = (receipt.logs || []).find((l) => Number(l.logIndex) === logIndex); + if (!log) return { ok: false, reason: `no log with index ${logIndex}` }; + if (String(log.address).toLowerCase() !== String(srcContract).toLowerCase()) { + return { ok: false, reason: `log emitted by ${log.address}, not srcContract` }; + } + if ((log.topics[0] || "").toLowerCase() !== ethers.utils.id(BURN_TOPIC).toLowerCase()) { + return { ok: false, reason: "log is not a BurnInitiated event" }; + } + // Resolve the governance-pinned destination from the SOURCE token (#5). + const destChainId = BigInt(log.topics[3]); + const partner = await ethCallTo(url, srcContract, partnerIface, "bridgePartner", [destChainId.toString()]); + return { + ok: true, + facts: criticalFacts({ + status: receipt.status, blockNumber: receipt.blockNumber, + logAddress: log.address, topics: log.topics, data: log.data, + destPartner: Array.isArray(partner) ? partner[0] : partner, + }), + }; + } catch (e) { + return { ok: false, reason: `rpc error: ${e.message}` }; + } +} + +/// #7: pick the first dest RPC (from the registry) that actually reports the +/// expected chain id; used for the relay clock, gas quote, and broadcast. +async function pickDestRpc(regUrls, destChainId) { + const cfg = await readChainConfig(regUrls, destChainId); + if (!cfg.ok) return { ok: false, reason: `dest ${cfg.reason}` }; + for (const entry of cfg.rpcs) { + try { + const secret = await Lit.Actions.Decrypt({ pkpId: BRIDGE_PKP_ID, ciphertext: entry.encSecret }); + const built = buildRpcUrl(entry, destChainId, secret); + if (!built.ok) continue; + const cid = await rpc(built.url, "eth_chainId", []); + if (BigInt(cid) === BigInt(destChainId)) return { ok: true, url: built.url }; + } catch { + /* try next */ + } + } + return { ok: false, reason: `no working dest RPC for chain ${destChainId}` }; +} + +async function ethCallTo(url, to, iface, fn, args) { + const data = iface.encodeFunctionData(fn, args); + const result = await rpc(url, "eth_call", [{ to, data }, "latest"]); + if (!result || result === "0x") throw new Error(`${fn} returned empty (wrong address or chain?)`); + return iface.decodeFunctionResult(fn, result); +} + +async function rpc(url, method, params) { + let lastErr; + // Generous retry: keyless public endpoints rate-limit under the registry-read + // burst (getChain + getRpc per chain per provider). Backoff up to ~3s clears + // the typical short rate-limit window. + for (let attempt = 0; attempt < 5; attempt++) { + if (attempt > 0) await new Promise((r) => setTimeout(r, 600 * attempt)); + try { + const res = await fetch(url, { + method: "POST", + headers: { "Content-Type": "application/json" }, + body: JSON.stringify({ jsonrpc: "2.0", id: 1, method, params }), + redirect: "error", + }); + if (res.status === 429 || res.status >= 500) { + lastErr = new Error(`${method} -> HTTP ${res.status}`); + continue; + } + const body = await res.json(); + if (body.error) throw new Error(`${method} -> ${body.error.message}`); + return body.result; + } catch (e) { + lastErr = e; + } + } + throw lastErr; +} + +if (typeof module !== "undefined" && module.exports) { + module.exports = { + RPC_TYPE, buildRpcUrl, checkRegistryRpcUrl, distinctHostCount, sameNative, + canonicalize, criticalFacts, tallyConsensus, effectiveMinConfirmations, + gasPrepaySufficient, mapEventToInputs, MIN_CONFIRMATIONS_FLOOR, REGISTRY_READ_QUORUM, + }; +} diff --git a/lit-bridge/action/bridgeAction.test.js b/lit-bridge/action/bridgeAction.test.js new file mode 100644 index 00000000..fd7ca9ea --- /dev/null +++ b/lit-bridge/action/bridgeAction.test.js @@ -0,0 +1,220 @@ +// Unit tests for the pure logic of bridgeAction.js. +// Run: node --test (from lit-bridge/action/) +// +// These cover the trust-critical decisions that don't need a network or the +// Lit runtime: provider URL construction, the registry-host allowlist, the +// canonicalization that drives consensus, and the quorum tally itself. + +const test = require("node:test"); +const assert = require("node:assert/strict"); + +const { + RPC_TYPE, + buildRpcUrl, + checkRegistryRpcUrl, + canonicalize, + criticalFacts, + tallyConsensus, + effectiveMinConfirmations, + gasPrepaySufficient, + mapEventToInputs, + distinctHostCount, + sameNative, + MIN_CONFIRMATIONS_FLOOR, + REGISTRY_READ_QUORUM, +} = require("./bridgeAction.js"); + +const KEY = "abcdef123456"; + +test("buildRpcUrl: alchemy constructs host from code map (config can't redirect)", () => { + const r = buildRpcUrl({ rpcType: RPC_TYPE.ALCHEMY }, 84532, KEY); + assert.equal(r.ok, true); + assert.equal(r.url, `https://base-sepolia.g.alchemy.com/v2/${KEY}`); +}); + +test("buildRpcUrl: infura constructs host from code map", () => { + const r = buildRpcUrl({ rpcType: RPC_TYPE.INFURA }, 421614, KEY); + assert.equal(r.ok, true); + assert.equal(r.url, `https://arbitrum-sepolia.infura.io/v3/${KEY}`); +}); + +test("buildRpcUrl: alchemy/infura reject chains with no code-resident host", () => { + assert.equal(buildRpcUrl({ rpcType: RPC_TYPE.ALCHEMY }, 999999, KEY).ok, false); + assert.equal(buildRpcUrl({ rpcType: RPC_TYPE.INFURA }, 999999, KEY).ok, false); +}); + +test("buildRpcUrl: custom must match the registry's plaintext host", () => { + const good = buildRpcUrl( + { rpcType: RPC_TYPE.CUSTOM, host: "rpc.my-chain.io" }, + 1234, + "https://rpc.my-chain.io/key/xyz" + ); + assert.equal(good.ok, true); + assert.equal(good.url, "https://rpc.my-chain.io/key/xyz"); + + const mismatch = buildRpcUrl( + { rpcType: RPC_TYPE.CUSTOM, host: "rpc.my-chain.io" }, + 1234, + "https://evil.example/key/xyz" + ); + assert.equal(mismatch.ok, false); +}); + +test("buildRpcUrl: custom rejects http and garbage", () => { + assert.equal( + buildRpcUrl({ rpcType: RPC_TYPE.CUSTOM, host: "rpc.x.io" }, 1, "http://rpc.x.io").ok, + false + ); + assert.equal( + buildRpcUrl({ rpcType: RPC_TYPE.CUSTOM, host: "rpc.x.io" }, 1, "not-a-url").ok, + false + ); +}); + +test("buildRpcUrl: unknown provider type fails closed", () => { + assert.equal(buildRpcUrl({ rpcType: 7 }, 1, KEY).ok, false); +}); + +test("checkRegistryRpcUrl: allowlist + https enforced (Base mainnet registry)", () => { + assert.equal(checkRegistryRpcUrl("https://mainnet.base.org").ok, true); + assert.equal(checkRegistryRpcUrl("https://base-mainnet.g.alchemy.com/v2/x").ok, true); + assert.equal(checkRegistryRpcUrl("http://mainnet.base.org").ok, false); // not https + assert.equal(checkRegistryRpcUrl("https://evil.example").ok, false); // not allowlisted + assert.equal(checkRegistryRpcUrl("https://sepolia.base.org").ok, false); // testnet no longer allowed + assert.equal(checkRegistryRpcUrl("garbage").ok, false); +}); + +test("canonicalize: key order independent, value sensitive", () => { + assert.equal( + canonicalize({ a: 1, b: [2, 3] }), + canonicalize({ b: [2, 3], a: 1 }) + ); + assert.notEqual(canonicalize({ a: 1 }), canonicalize({ a: 2 })); + assert.notEqual(canonicalize([1, 2]), canonicalize([2, 1])); // arrays are ordered +}); + +test("criticalFacts: normalizes case + numeric form, excludes head", () => { + const a = criticalFacts({ + status: "0x1", + blockNumber: "0x10", + logAddress: "0xAbCd", + topics: ["0xTOP", "0xFROM"], + data: "0xDEAD", + }); + const b = criticalFacts({ + status: 1, + blockNumber: 16, + logAddress: "0xabcd", + topics: ["0xtop", "0xfrom"], + data: "0xdead", + }); + assert.equal(canonicalize(a), canonicalize(b)); + assert.ok(!("head" in a) && !("confirmations" in a)); +}); + +test("tallyConsensus: 2-of-3 agree, 1 disagrees -> agreed", () => { + const f = { status: "1", blockNumber: "100", logAddress: "0xa", topics: ["0xt"], data: "0x" }; + const other = { ...f, blockNumber: "999" }; + const r = tallyConsensus( + [{ ok: true, facts: f }, { ok: true, facts: f }, { ok: true, facts: other }], + 2 + ); + assert.equal(r.agreed, true); + assert.equal(r.facts.blockNumber, "100"); +}); + +test("tallyConsensus: no majority reaches quorum -> fail closed", () => { + const a = { status: "1", blockNumber: "1", logAddress: "0xa", topics: [], data: "0x" }; + const b = { ...a, blockNumber: "2" }; + const c = { ...a, blockNumber: "3" }; + const r = tallyConsensus( + [{ ok: true, facts: a }, { ok: true, facts: b }, { ok: true, facts: c }], + 2 + ); + assert.equal(r.agreed, false); +}); + +test("tallyConsensus: abstaining providers don't count toward quorum", () => { + const f = { status: "1", blockNumber: "5", logAddress: "0xa", topics: [], data: "0x" }; + // one good vote + two abstentions, quorum 2 -> not enough voters + const r = tallyConsensus( + [{ ok: true, facts: f }, { ok: false, reason: "below finality" }, { ok: false, reason: "rpc error" }], + 2 + ); + assert.equal(r.agreed, false); + assert.match(r.reason, /only 1 provider/); +}); + +test("tallyConsensus: quorum 1 single provider (escape hatch) works", () => { + const f = { status: "1", blockNumber: "5", logAddress: "0xa", topics: [], data: "0x" }; + const r = tallyConsensus([{ ok: true, facts: f }], 1); + assert.equal(r.agreed, true); +}); + +test("tallyConsensus: a single lying RPC cannot forge at quorum 2", () => { + // Two honest providers agree; the attacker-controlled one fabricates a + // different receipt. With quorum 2 the fabrication is outvoted. + const honest = { status: "1", blockNumber: "100", logAddress: "0xtoken", topics: ["0xburn"], data: "0x01" }; + const forged = { status: "1", blockNumber: "100", logAddress: "0xtoken", topics: ["0xburn"], data: "0xFF" }; + const r = tallyConsensus( + [{ ok: true, facts: honest }, { ok: true, facts: honest }, { ok: true, facts: forged }], + 2 + ); + assert.equal(r.agreed, true); + assert.equal(r.facts.data, "0x01"); // honest data wins +}); + +test("effectiveMinConfirmations: floor wins over a too-low registry value", () => { + assert.equal(effectiveMinConfirmations(0), MIN_CONFIRMATIONS_FLOOR); + assert.equal(effectiveMinConfirmations(50), 50); +}); + +test("distinctHostCount: only distinct hosts count toward quorum (#6)", () => { + assert.equal(distinctHostCount(["https://a.com/x", "https://b.com/y"]), 2); + assert.equal(distinctHostCount(["https://a.com/x", "https://a.com/z"]), 1); // same host, one trust root + assert.equal(distinctHostCount([]), 0); + assert.equal(distinctHostCount(["garbage", "https://a.com"]), 1); // invalid skipped +}); + +test("REGISTRY_READ_QUORUM is >= 2 (#1 — bootstrap read is M-of-N)", () => { + assert.ok(REGISTRY_READ_QUORUM >= 2); +}); + +test("sameNative: auto-relay only between ETH-native chains (#3)", () => { + assert.equal(sameNative(8453, 42161), true); // Base + Arbitrum, both ETH + assert.equal(sameNative(84532, 421614), true); // testnets, both ETH + assert.equal(sameNative(8453, 137), false); // Polygon (MATIC) — wei compare invalid + assert.equal(sameNative(137, 8453), false); +}); + +test("gasPrepaySufficient: covers dest gas iff prepay >= gasPrice*limit (same native)", () => { + const gasPrice = 100000000n; // 0.1 gwei + const limit = 250000; + const required = gasPrice * BigInt(limit); // 25_000_000_000_000 wei + // exact and over are sufficient; under is not. Accepts string/bigint inputs. + assert.equal(gasPrepaySufficient(required.toString(), gasPrice, limit), true); + assert.equal(gasPrepaySufficient(required * 2n, gasPrice, limit), true); + assert.equal(gasPrepaySufficient(required - 1n, gasPrice, limit), false); + assert.equal(gasPrepaySufficient(0n, gasPrice, limit), false); // un-prepaid burn -> not relayed +}); + +test("mapEventToInputs: pulls only identifiers from a chain_event (ignores decoded)", () => { + const r = mapEventToInputs({ + chain_id: 84532, + transaction_hash: "0xabc", + contract_address: "0xToken", + log_index: 3, + decoded: { arg1: "0xattacker" }, // deliberately ignored — we re-derive from the log + }); + assert.equal(r.ok, true); + assert.equal(r.srcChainId, 84532); + assert.equal(r.burnTxHash, "0xabc"); + assert.equal(r.srcContract, "0xToken"); + assert.equal(r.logIndex, 3); +}); + +test("mapEventToInputs: falls back to event.address and rejects incomplete events", () => { + assert.equal(mapEventToInputs({ chain_id: 1, transaction_hash: "0x1", address: "0xT", log_index: 0 }).ok, true); + assert.equal(mapEventToInputs(null).ok, false); + assert.equal(mapEventToInputs({ chain_id: 1, transaction_hash: "0x1" }).ok, false); // no contract/log_index +}); diff --git a/lit-bridge/contracts/.gitignore b/lit-bridge/contracts/.gitignore new file mode 100644 index 00000000..827d1d82 --- /dev/null +++ b/lit-bridge/contracts/.gitignore @@ -0,0 +1,6 @@ +node_modules +lib +out +cache_forge +.env +broadcast diff --git a/lit-bridge/contracts/foundry.toml b/lit-bridge/contracts/foundry.toml new file mode 100644 index 00000000..d7b03f31 --- /dev/null +++ b/lit-bridge/contracts/foundry.toml @@ -0,0 +1,22 @@ +[profile.default] +src = "src" +test = "test" +script = "script" +out = "out" +libs = ["lib", "node_modules"] +cache_path = "cache_forge" +solc_version = "0.8.28" +optimizer = true +optimizer_runs = 200 +via_ir = true +# OpenZeppelin v5 uses Cancun's mcopy; Base + Arbitrum (Sepolia + mainnet) all +# 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Built with Foundry; OpenZeppelin pulled via npm.", + "dependencies": { + "@openzeppelin/contracts": "^5.0.2" + } +} diff --git a/lit-bridge/contracts/remappings.txt b/lit-bridge/contracts/remappings.txt new file mode 100644 index 00000000..4b851598 --- /dev/null +++ b/lit-bridge/contracts/remappings.txt @@ -0,0 +1,2 @@ +@openzeppelin/=node_modules/@openzeppelin/ +forge-std/=lib/forge-std/src/ diff --git a/lit-bridge/contracts/script/Deploy.s.sol b/lit-bridge/contracts/script/Deploy.s.sol new file mode 100644 index 00000000..01d164e6 --- /dev/null +++ b/lit-bridge/contracts/script/Deploy.s.sol @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: MIT +pragma solidity ^0.8.20; + +import {Script, console} from "forge-std/Script.sol"; +import {BridgeConfigRegistry} from "../src/BridgeConfigRegistry.sol"; +import {BridgeToken} from "../src/BridgeToken.sol"; + +/// @notice Deploy the BridgeConfigRegistry (control plane) to Base. +/// +/// Usage: +/// forge script script/Deploy.s.sol:DeployRegistry \ +/// --rpc-url $BASE_SEPOLIA_RPC_URL --broadcast \ +/// --private-key $DEPLOYER_PRIVATE_KEY +/// +/// `REGISTRY_OWNER` should be the Base Safe in production. For local dev it can +/// be the deployer EOA; transfer ownership to the Safe later via +/// transferOwnership + acceptOwnership (two-step). +contract DeployRegistry is Script { + function run() external returns (BridgeConfigRegistry registry) { + address owner = vm.envOr("REGISTRY_OWNER", msg.sender); + vm.startBroadcast(); + registry = new BridgeConfigRegistry(owner); + vm.stopBroadcast(); + console.log("BridgeConfigRegistry:", address(registry)); + console.log("owner:", owner); + } +} + +/// @notice Deploy a BridgeToken on one chain, pinning the bridge oracle address. +/// +/// Usage: +/// ORACLE_ADDRESS=0x... TOKEN_NAME="Bridge Coin" TOKEN_SYMBOL=BRDG \ +/// INITIAL_SUPPLY=1000000000000000000000000 \ +/// forge script script/Deploy.s.sol:DeployToken \ +/// --rpc-url $RPC_URL --broadcast --private-key $DEPLOYER_PRIVATE_KEY +/// +/// `ORACLE_ADDRESS` is the bridge signing account's address (Option B) — stable +/// across action upgrades. Mint initial supply only on the home chain. +contract DeployToken is Script { + function run() external returns (BridgeToken token) { + address oracle = vm.envAddress("ORACLE_ADDRESS"); + string memory name = vm.envOr("TOKEN_NAME", string("Bridge Coin")); + string memory symbol = vm.envOr("TOKEN_SYMBOL", string("BRDG")); + uint256 initialSupply = vm.envOr("INITIAL_SUPPLY", uint256(0)); + + vm.startBroadcast(); + token = new BridgeToken(name, symbol, initialSupply, oracle); + vm.stopBroadcast(); + console.log("BridgeToken:", address(token)); + console.log("oracle:", oracle); + console.log("initialSupply:", initialSupply); + } +} diff --git a/lit-bridge/contracts/src/BridgeConfigRegistry.sol b/lit-bridge/contracts/src/BridgeConfigRegistry.sol new file mode 100644 index 00000000..25831f0c --- /dev/null +++ b/lit-bridge/contracts/src/BridgeConfigRegistry.sol @@ -0,0 +1,131 @@ +// SPDX-License-Identifier: MIT +pragma solidity ^0.8.20; + +import {Ownable2Step, Ownable} from "@openzeppelin/contracts/access/Ownable2Step.sol"; + +/// @title BridgeConfigRegistry +/// @notice Control-plane configuration for the lit-bridge oracle. Lives on one +/// chain (Base) and is read at runtime by the bridge Lit Action to +/// decide, per source chain, which RPCs to query and how many must +/// agree (quorum) before a burn is considered real. +/// +/// Why this exists (see plans/hyperlane-competitor.md): +/// * Moving per-chain RPC config out of the action source and onto this +/// contract means **adding a chain is a governed config write, not a code +/// edit** — the action's IPFS CID (and therefore the oracle's signer +/// address) stays stable, so no BridgeToken ever needs to be redeployed. +/// * The action pins only this registry's address + the host allowlist used +/// to read it; everything else is governed here. +/// +/// Trust: +/// * `owner` is the Base Safe. Only it can change config. Every change emits +/// an event so watchers can react. This contract is therefore a load- +/// bearing part of the trust model — see the threat table in the plan. +/// * Secrets (RPC API keys / full URLs) are NEVER stored in plaintext. For +/// `Alchemy`/`Infura` entries only an encrypted API key is stored and the +/// action constructs the hostname from a code-resident map (config cannot +/// redirect those reads). For `Custom` entries a plaintext `host` plus an +/// encrypted full URL are stored; the action asserts they agree after +/// decrypting in-TEE. +contract BridgeConfigRegistry is Ownable2Step { + enum RpcType { + Alchemy, // 0 — encSecret = encrypted API key; host ignored + Infura, // 1 — encSecret = encrypted API key; host ignored + Custom // 2 — encSecret = encrypted full URL; host = expected hostname + } + + struct RpcEntry { + RpcType rpcType; + string host; // plaintext expected hostname (Custom only; "" otherwise) + string encSecret; // Lit-encrypted API key (Alchemy/Infura) or URL (Custom) + } + + struct ChainConfig { + bool exists; + uint64 minConfirmations; // action floors this; 0 is allowed here + uint8 quorum; // how many RPCs must agree; >= 1 + RpcEntry[] rpcs; + } + + mapping(uint256 => ChainConfig) private _chains; + + error ZeroQuorum(); + error QuorumExceedsRpcCount(); + error CustomHostRequired(); + error EmptySecret(); + error ChainNotConfigured(); + error RpcIndexOutOfRange(); + + event ChainConfigured( + uint256 indexed chainId, + uint64 minConfirmations, + uint8 quorum, + uint256 rpcCount + ); + event ChainRemoved(uint256 indexed chainId); + + constructor(address initialOwner) Ownable(initialOwner) {} + + /// @notice Create or replace the full config for `chainId`. Wholesale + /// replace keeps reads simple and changes atomic. Owner-only. + function setChain( + uint256 chainId, + uint64 minConfirmations, + uint8 quorum, + RpcEntry[] calldata rpcs + ) external onlyOwner { + if (quorum == 0) revert ZeroQuorum(); + if (rpcs.length < quorum) revert QuorumExceedsRpcCount(); + for (uint256 i = 0; i < rpcs.length; i++) { + if (bytes(rpcs[i].encSecret).length == 0) revert EmptySecret(); + if (rpcs[i].rpcType == RpcType.Custom && bytes(rpcs[i].host).length == 0) { + revert CustomHostRequired(); + } + } + + ChainConfig storage c = _chains[chainId]; + c.exists = true; + c.minConfirmations = minConfirmations; + c.quorum = quorum; + delete c.rpcs; + for (uint256 i = 0; i < rpcs.length; i++) { + c.rpcs.push(rpcs[i]); + } + + emit ChainConfigured(chainId, minConfirmations, quorum, rpcs.length); + } + + /// @notice Remove a chain entirely. Owner-only. + function removeChain(uint256 chainId) external onlyOwner { + if (!_chains[chainId].exists) revert ChainNotConfigured(); + delete _chains[chainId]; + emit ChainRemoved(chainId); + } + + // ── Views read by the Lit Action (decoded via ethers.Interface) ───────── + + /// @notice Header for a chain. `exists` is false for unconfigured chains — + /// the action fails closed on that. Split from the RPC list so the + /// action can size its loop without returning unbounded arrays. + function getChain(uint256 chainId) + external + view + returns (bool exists, uint64 minConfirmations, uint8 quorum, uint256 rpcCount) + { + ChainConfig storage c = _chains[chainId]; + return (c.exists, c.minConfirmations, c.quorum, c.rpcs.length); + } + + /// @notice One RPC entry by index. The action loops `0..rpcCount`. + function getRpc(uint256 chainId, uint256 index) + external + view + returns (uint8 rpcType, string memory host, string memory encSecret) + { + ChainConfig storage c = _chains[chainId]; + if (!c.exists) revert ChainNotConfigured(); + if (index >= c.rpcs.length) revert RpcIndexOutOfRange(); + RpcEntry storage e = c.rpcs[index]; + return (uint8(e.rpcType), e.host, e.encSecret); + } +} diff --git a/lit-bridge/contracts/src/BridgeToken.sol b/lit-bridge/contracts/src/BridgeToken.sol new file mode 100644 index 00000000..fa75b8ad --- /dev/null +++ b/lit-bridge/contracts/src/BridgeToken.sol @@ -0,0 +1,219 @@ +// SPDX-License-Identifier: MIT +pragma solidity ^0.8.20; + +import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol"; +import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; +import {MessageHashUtils} from "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol"; +import {Ownable, Ownable2Step} from "@openzeppelin/contracts/access/Ownable2Step.sol"; + +/// @title BridgeToken +/// @notice A burn/mint cross-chain ERC-20. The same contract is deployed on +/// every chain the token should live on. To move tokens from chain A +/// to chain B, the holder calls `burn` on A (destroying local supply +/// and emitting `BurnInitiated`); the lit-bridge oracle observes the +/// burn across N RPCs, signs a mint authorization, and anyone can call +/// `mint` on B with that signature. +/// +/// Trust (see plans/hyperlane-competitor.md): +/// * `bridgeOracle` is the address of the bridge's dedicated signing account +/// (Option B). Unlike a CID-derived signer, this address is **stable across +/// action logic upgrades** — fixing a bug in the verification action does +/// not rotate the oracle, so no BridgeToken ever needs to be re-pointed. +/// The account is governed by the Base Safe. +/// * `bridgePartner[srcChainId] => address` pins the trusted sibling contract +/// per source chain. Wiring is **write-once per chain**: once set non-zero +/// it can never change, closing the "owner re-points partner at a copycat +/// and mints unbacked supply" attack. +/// * Each `(srcChainId, burnTxHash, logIndex)` triple can mint exactly once — +/// `usedBurnIds` prevents replay. +/// +/// Note: this contract is intentionally unchanged from the original example. It +/// only ever sees an immutable oracle *address* and does not care how that key +/// is custodied — the registry / consensus / encryption work all lives in the +/// off-chain action and the BridgeConfigRegistry. +contract BridgeToken is ERC20, Ownable2Step { + using ECDSA for bytes32; + using MessageHashUtils for bytes32; + + /// @notice Account authorized to attest cross-chain burns (the bridge + /// signing account, governed by the Base Safe). + address public immutable bridgeOracle; + + /// @notice `owner` (from Ownable2Step) wires sibling chains + sets fee/gas + /// config. Two-step transfer hands control to the Base Safe (Phase 6). + + /// @notice Trusted BridgeToken deployment per source chain id. + mapping(uint256 => address) public bridgePartner; + + /// @notice Burns already redeemed here — keyed on + /// keccak256(srcChainId, burnTxHash, logIndex). + mapping(bytes32 => bool) public usedBurnIds; + + /// @notice Chain-local counter mixed into `BurnInitiated`. + uint256 public burnNonce; + + /// @notice Fee config (set by owner). On mint, `feeFlat + amount*feeBps/1e4` + /// is minted to `feeTreasury` and the remainder to the recipient. + /// No fee is taken while `feeTreasury` is the zero address. The skim + /// accrues the bridged token in the treasury; converting it to gas + /// to refill the oracle is an off-chain concern (deferred). + address public feeTreasury; + uint256 public feeFlat; + uint16 public feeBps; + uint16 public constant MAX_FEE_BPS = 500; // 5% hard cap, enforced on set + + error FeeBpsTooHigh(); + error UnknownSourceChain(); + error UnknownDestinationChain(); + error SourceContractMismatch(); + error AlreadyRedeemed(); + error AuthorizationExpired(); + error InvalidBridgeSignature(); + error PartnerAlreadySet(); + error ZeroRecipient(); + error ZeroPartner(); + error SweepFailed(); + + event BurnInitiated( + address indexed from, + address indexed recipient, + uint256 amount, + uint256 indexed destChainId, + uint256 nonce, + uint256 gasPrepaid + ); + + event GasSwept(address indexed to, uint256 amount); + + event BridgeMint( + address indexed recipient, + uint256 amount, // net amount minted to recipient (after fee) + uint256 fee, // skimmed to feeTreasury + uint256 indexed srcChainId, + bytes32 burnTxHash, + uint256 logIndex + ); + + event BridgePartnerSet(uint256 indexed chainId, address partner); + event FeeConfigSet(address treasury, uint256 feeFlat, uint16 feeBps); + + constructor( + string memory name_, + string memory symbol_, + uint256 initialSupply, + address oracle_ + ) ERC20(name_, symbol_) Ownable(msg.sender) { + bridgeOracle = oracle_; + if (initialSupply > 0) { + _mint(msg.sender, initialSupply); + } + } + + /// @notice Burn `amount` from the caller and announce intent to mint on + /// `destChainId` at `recipient`. + function burn(uint256 amount, uint256 destChainId, address recipient) + external + payable + returns (uint256) + { + if (bridgePartner[destChainId] == address(0)) revert UnknownDestinationChain(); + if (recipient == address(0)) revert ZeroRecipient(); + uint256 n = ++burnNonce; + _burn(msg.sender, amount); + // `msg.value` is an optional native gas prepay to reimburse the relayer + // for the destination mint. It pools in this contract for the owner to + // sweep. The relayer auto-mints ONLY when the prepay covers destination + // gas — so an un(der)-prepaid burn simply isn't auto-relayed (the holder + // can still self-submit `mint` and pay their own gas). This is what makes + // bridging an illiquid token safe: no prepay, no relayer gas spent. + emit BurnInitiated(msg.sender, recipient, amount, destChainId, n, msg.value); + return n; + } + + /// @notice Withdraw pooled gas prepays (native) to `to`. Owner-only. The + /// owner moves these to the relayer's gas wallet (cross-chain + /// rebalancing is off-chain). + function sweepGas(address to) external onlyOwner { + uint256 bal = address(this).balance; + (bool ok,) = to.call{value: bal}(""); + if (!ok) revert SweepFailed(); + emit GasSwept(to, bal); + } + + /// @notice Redeem a burn observed on another chain. Anyone can submit — the + /// signature authorizes the mint, not the caller. + function mint( + uint256 srcChainId, + address srcContract, + bytes32 burnTxHash, + uint256 logIndex, + address recipient, + uint256 amount, + uint256 srcNonce, + uint256 deadline, + bytes calldata signature + ) external { + if (block.timestamp > deadline) revert AuthorizationExpired(); + + address expected = bridgePartner[srcChainId]; + if (expected == address(0)) revert UnknownSourceChain(); + if (expected != srcContract) revert SourceContractMismatch(); + + bytes32 burnId = keccak256(abi.encode(srcChainId, burnTxHash, logIndex)); + if (usedBurnIds[burnId]) revert AlreadyRedeemed(); + + bytes32 digest = keccak256( + abi.encode( + srcChainId, + srcContract, + burnTxHash, + logIndex, + recipient, + amount, + srcNonce, + deadline, + address(this), + block.chainid + ) + ).toEthSignedMessageHash(); + + if (digest.recover(signature) != bridgeOracle) { + revert InvalidBridgeSignature(); + } + + usedBurnIds[burnId] = true; + + // Skim the fee to the treasury, mint the remainder to the recipient. + // The fee is clamped to `amount` so the destination mint can NEVER + // revert on fee config — the source tokens are already burned, so a + // revert here would strand them. + uint256 fee; + address treasury = feeTreasury; + if (treasury != address(0)) { + fee = feeFlat + (amount * feeBps) / 10_000; + if (fee > amount) fee = amount; + if (fee > 0) _mint(treasury, fee); + } + uint256 net = amount - fee; + _mint(recipient, net); + emit BridgeMint(recipient, net, fee, srcChainId, burnTxHash, logIndex); + } + + /// @notice Set the cross-chain mint fee. Owner-only, capped at MAX_FEE_BPS. + /// Set `treasury` to the zero address to disable fees. + function setFeeConfig(address treasury, uint256 feeFlat_, uint16 feeBps_) external onlyOwner { + if (feeBps_ > MAX_FEE_BPS) revert FeeBpsTooHigh(); + feeTreasury = treasury; + feeFlat = feeFlat_; + feeBps = feeBps_; + emit FeeConfigSet(treasury, feeFlat_, feeBps_); + } + + /// @notice One-time wiring of a sibling chain. Write-once per `chainId`. + function setBridgePartner(uint256 chainId, address partner) external onlyOwner { + if (partner == address(0)) revert ZeroPartner(); + if (bridgePartner[chainId] != address(0)) revert PartnerAlreadySet(); + bridgePartner[chainId] = partner; + emit BridgePartnerSet(chainId, partner); + } +} diff --git a/lit-bridge/contracts/test/BridgeConfigRegistry.t.sol b/lit-bridge/contracts/test/BridgeConfigRegistry.t.sol new file mode 100644 index 00000000..84ebfb3a --- /dev/null +++ b/lit-bridge/contracts/test/BridgeConfigRegistry.t.sol @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: MIT +pragma solidity ^0.8.20; + +import {Test} from "forge-std/Test.sol"; +import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol"; +import {BridgeConfigRegistry} from "../src/BridgeConfigRegistry.sol"; + +contract BridgeConfigRegistryTest is Test { + BridgeConfigRegistry registry; + + address owner = address(0xA11CE); + address safe = address(0x5AFE); + address stranger = address(0xBAD); + + function setUp() public { + vm.prank(owner); + registry = new BridgeConfigRegistry(owner); + } + + function _alchemy(string memory secret) + internal + pure + returns (BridgeConfigRegistry.RpcEntry memory) + { + return BridgeConfigRegistry.RpcEntry({ + rpcType: BridgeConfigRegistry.RpcType.Alchemy, + host: "", + encSecret: secret + }); + } + + function _custom(string memory host, string memory secret) + internal + pure + returns (BridgeConfigRegistry.RpcEntry memory) + { + return BridgeConfigRegistry.RpcEntry({ + rpcType: BridgeConfigRegistry.RpcType.Custom, + host: host, + encSecret: secret + }); + } + + function test_storesAndReadsBackConfig() public { + BridgeConfigRegistry.RpcEntry[] memory rpcs = new BridgeConfigRegistry.RpcEntry[](2); + rpcs[0] = _alchemy("cipher-alchemy"); + rpcs[1] = BridgeConfigRegistry.RpcEntry({ + rpcType: BridgeConfigRegistry.RpcType.Infura, + host: "", + encSecret: "cipher-infura" + }); + + vm.prank(owner); + registry.setChain(84532, 5, 2, rpcs); + + (bool exists, uint64 minConf, uint8 quorum, uint256 rpcCount) = registry.getChain(84532); + assertTrue(exists); + assertEq(minConf, 5); + assertEq(quorum, 2); + assertEq(rpcCount, 2); + + (uint8 rpcType,, string memory encSecret) = registry.getRpc(84532, 0); + assertEq(rpcType, uint8(BridgeConfigRegistry.RpcType.Alchemy)); + assertEq(encSecret, "cipher-alchemy"); + } + + function test_revertsOnZeroQuorum() public { + BridgeConfigRegistry.RpcEntry[] memory rpcs = new BridgeConfigRegistry.RpcEntry[](1); + rpcs[0] = _alchemy("c"); + vm.prank(owner); + vm.expectRevert(BridgeConfigRegistry.ZeroQuorum.selector); + registry.setChain(1, 5, 0, rpcs); + } + + function test_revertsWhenQuorumExceedsRpcCount() public { + BridgeConfigRegistry.RpcEntry[] memory rpcs = new BridgeConfigRegistry.RpcEntry[](1); + rpcs[0] = _alchemy("c"); + vm.prank(owner); + vm.expectRevert(BridgeConfigRegistry.QuorumExceedsRpcCount.selector); + registry.setChain(1, 5, 2, rpcs); + } + + function test_requiresCustomHostAndNonEmptySecret() public { + BridgeConfigRegistry.RpcEntry[] memory bad = new BridgeConfigRegistry.RpcEntry[](1); + bad[0] = _custom("", "c"); + vm.prank(owner); + vm.expectRevert(BridgeConfigRegistry.CustomHostRequired.selector); + registry.setChain(1, 5, 1, bad); + + BridgeConfigRegistry.RpcEntry[] memory empty = new BridgeConfigRegistry.RpcEntry[](1); + empty[0] = _alchemy(""); + vm.prank(owner); + vm.expectRevert(BridgeConfigRegistry.EmptySecret.selector); + registry.setChain(1, 5, 1, empty); + } + + function test_onlyOwnerWritesAndTwoStepSafeHandoff() public { + BridgeConfigRegistry.RpcEntry[] memory rpcs = new BridgeConfigRegistry.RpcEntry[](1); + rpcs[0] = _alchemy("c"); + + vm.prank(stranger); + vm.expectRevert( + abi.encodeWithSelector(Ownable.OwnableUnauthorizedAccount.selector, stranger) + ); + registry.setChain(1, 5, 1, rpcs); + + // Two-step transfer to the Safe. + vm.prank(owner); + registry.transferOwnership(safe); + assertEq(registry.owner(), owner); // not yet + + vm.prank(safe); + registry.acceptOwnership(); + assertEq(registry.owner(), safe); + } + + function test_replaceWholesaleAndRemove() public { + BridgeConfigRegistry.RpcEntry[] memory one = new BridgeConfigRegistry.RpcEntry[](1); + one[0] = _alchemy("a"); + vm.prank(owner); + registry.setChain(1, 5, 1, one); + + BridgeConfigRegistry.RpcEntry[] memory two = new BridgeConfigRegistry.RpcEntry[](2); + two[0] = _alchemy("a2"); + two[1] = _custom("rpc.x.io", "u"); + vm.prank(owner); + registry.setChain(1, 9, 2, two); + + (, uint64 minConf, uint8 quorum, uint256 rpcCount) = registry.getChain(1); + assertEq(minConf, 9); + assertEq(quorum, 2); + assertEq(rpcCount, 2); + + vm.prank(owner); + registry.removeChain(1); + (bool exists,,,) = registry.getChain(1); + assertFalse(exists); + + vm.expectRevert(BridgeConfigRegistry.ChainNotConfigured.selector); + registry.getRpc(1, 0); + } +} diff --git a/lit-bridge/contracts/test/BridgeToken.t.sol b/lit-bridge/contracts/test/BridgeToken.t.sol new file mode 100644 index 00000000..276504ee --- /dev/null +++ b/lit-bridge/contracts/test/BridgeToken.t.sol @@ -0,0 +1,150 @@ +// SPDX-License-Identifier: MIT +pragma solidity ^0.8.20; + +import {Test} from "forge-std/Test.sol"; +import {MessageHashUtils} from "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol"; +import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol"; +import {BridgeToken} from "../src/BridgeToken.sol"; + +contract BridgeTokenTest is Test { + BridgeToken token; + + uint256 oraclePk; + address oracle; + address treasury = address(0x7EE); + address recipient = address(0xBEEF); + address stranger = address(0xBAD); + + // A fixed burn the destination is redeeming. + uint256 srcChainId = 8453; + address srcContract = address(0x5012); + bytes32 burnTxHash = keccak256("burn"); + uint256 logIndex = 3; + uint256 srcNonce = 1; + + function setUp() public { + oraclePk = 0xA11CE; + oracle = vm.addr(oraclePk); + token = new BridgeToken("Bridge Coin", "BRDG", 1000 ether, oracle); // this == owner, holds supply + token.setBridgePartner(srcChainId, srcContract); + } + + function _sign(address to, uint256 amount, uint256 deadline) internal view returns (bytes memory) { + bytes32 inner = keccak256( + abi.encode( + srcChainId, srcContract, burnTxHash, logIndex, to, + amount, srcNonce, deadline, address(token), block.chainid + ) + ); + bytes32 ethHash = MessageHashUtils.toEthSignedMessageHash(inner); + (uint8 v, bytes32 r, bytes32 s) = vm.sign(oraclePk, ethHash); + return abi.encodePacked(r, s, v); + } + + function _mint(uint256 amount) internal { + uint256 deadline = block.timestamp + 3600; + bytes memory sig = _sign(recipient, amount, deadline); + token.mint(srcChainId, srcContract, burnTxHash, logIndex, recipient, amount, srcNonce, deadline, sig); + } + + function test_mintNoFeeWhenTreasuryUnset() public { + _mint(1000 ether); + assertEq(token.balanceOf(recipient), 1000 ether); + assertEq(token.balanceOf(treasury), 0); + } + + function test_mintWithBpsFee() public { + token.setFeeConfig(treasury, 0, 100); // 1% + _mint(1000 ether); + assertEq(token.balanceOf(treasury), 10 ether); + assertEq(token.balanceOf(recipient), 990 ether); + } + + function test_mintWithFlatPlusBpsFee() public { + token.setFeeConfig(treasury, 1 ether, 100); // 1 flat + 1% + _mint(1000 ether); + assertEq(token.balanceOf(treasury), 11 ether); + assertEq(token.balanceOf(recipient), 989 ether); + } + + function test_feeClampNeverRevertsOnDust() public { + // Flat fee larger than the transfer: clamp to amount, recipient gets 0, + // and crucially the mint does NOT revert (source tokens already burned). + token.setFeeConfig(treasury, 5 ether, 0); + _mint(2 ether); + assertEq(token.balanceOf(treasury), 2 ether); + assertEq(token.balanceOf(recipient), 0); + } + + function test_replayRejected() public { + _mint(100 ether); + uint256 deadline = block.timestamp + 3600; + bytes memory sig = _sign(recipient, 100 ether, deadline); + vm.expectRevert(BridgeToken.AlreadyRedeemed.selector); + token.mint(srcChainId, srcContract, burnTxHash, logIndex, recipient, 100 ether, srcNonce, deadline, sig); + } + + function test_sourceContractMismatch() public { + uint256 deadline = block.timestamp + 3600; + bytes memory sig = _sign(recipient, 100 ether, deadline); + vm.expectRevert(BridgeToken.SourceContractMismatch.selector); + token.mint(srcChainId, address(0xDEAD), burnTxHash, logIndex, recipient, 100 ether, srcNonce, deadline, sig); + } + + function test_badSignatureRejected() public { + uint256 deadline = block.timestamp + 3600; + // Sign with a different key than the oracle. + bytes32 inner = keccak256( + abi.encode(srcChainId, srcContract, burnTxHash, logIndex, recipient, 100 ether, srcNonce, deadline, address(token), block.chainid) + ); + (uint8 v, bytes32 r, bytes32 s) = vm.sign(0xBEEF, MessageHashUtils.toEthSignedMessageHash(inner)); + vm.expectRevert(BridgeToken.InvalidBridgeSignature.selector); + token.mint(srcChainId, srcContract, burnTxHash, logIndex, recipient, 100 ether, srcNonce, deadline, abi.encodePacked(r, s, v)); + } + + function test_twoStepOwnershipTransferToSafe() public { + address safe = address(0x5AFE); + token.transferOwnership(safe); // current owner (this) proposes + assertEq(token.owner(), address(this)); // not yet — two-step + assertEq(token.pendingOwner(), safe); + vm.prank(safe); + token.acceptOwnership(); + assertEq(token.owner(), safe); + // old owner can no longer wire/config + vm.expectRevert(abi.encodeWithSelector(Ownable.OwnableUnauthorizedAccount.selector, address(this))); + token.setFeeConfig(treasury, 0, 50); + } + + function test_burnEscrowsGasPrepay() public { + uint256 prepay = 0.001 ether; + vm.deal(address(this), prepay); + token.burn{value: prepay}(100 ether, srcChainId, recipient); + assertEq(address(token).balance, prepay); // prepay pooled in the contract + } + + function test_sweepGasOwnerOnly() public { + vm.deal(address(this), 0.002 ether); + token.burn{value: 0.002 ether}(50 ether, srcChainId, recipient); + + vm.prank(stranger); + vm.expectRevert(abi.encodeWithSelector(Ownable.OwnableUnauthorizedAccount.selector, stranger)); + token.sweepGas(stranger); + + address sink = address(0x5151); + token.sweepGas(sink); + assertEq(sink.balance, 0.002 ether); + assertEq(address(token).balance, 0); + } + + function test_setFeeConfigOnlyOwnerAndCap() public { + vm.prank(stranger); + vm.expectRevert(abi.encodeWithSelector(Ownable.OwnableUnauthorizedAccount.selector, stranger)); + token.setFeeConfig(treasury, 0, 100); + + vm.expectRevert(BridgeToken.FeeBpsTooHigh.selector); + token.setFeeConfig(treasury, 0, 501); // > MAX_FEE_BPS (500) + + token.setFeeConfig(treasury, 0, 500); // exactly the cap is fine + assertEq(token.feeBps(), 500); + } +} diff --git a/lit-bridge/docs/bringing-a-token-to-new-chains.md b/lit-bridge/docs/bringing-a-token-to-new-chains.md new file mode 100644 index 00000000..abad40b4 --- /dev/null +++ b/lit-bridge/docs/bringing-a-token-to-new-chains.md @@ -0,0 +1,128 @@ +# Bringing a token to new chains with lit-bridge + +lit-bridge makes a token live on multiple chains with a **burn/mint** model: burn +on chain A, an oracle verifies the burn and authorizes a mint on chain B. The +oracle is a **content-addressed Lit Action** that reads the source chain over N +independent RPCs and requires M-of-N agreement — there is **no validator set to +bootstrap**, which is what makes adding a chain cheap and permissionless. + +This guide is for token issuers. Read it before you deploy anything. + +## What's supported today (and what isn't) + +- ✅ **A new burn/mint token across EVM chains.** `BridgeToken` is an ERC-20 that + is the same contract on every chain; supply moves by burn→mint. This is what + `scripts/setup.js` deploys. +- ✅ **Adding chains** that the action can reach (see "Adding a new chain"). +- ⛔ **Wrapping an EXISTING token** (lock-and-mint on its home chain, synthetic + elsewhere) is **not built yet** — it needs the collateral/synthetic *router* + contracts (tracked in `plans/hyperlane-competitor.md`). If you have a live + token already, that's the path you want; it's the next contract work. +- ⛔ **Non-EVM chains** are out of scope. + +## Who owns what + +Two layers, owned by different parties: + +- **Shared platform** — the **BridgeConfigRegistry** (per-chain RPC config + + quorum) and the **signing oracle account** (the chain-secured Lit account). The + platform operator governs these with a Safe; they're the same for every token. +- **Your token** — the **`BridgeToken` contracts** you deploy on each chain. *You* + own these (your Safe/EOA): you set your fee, wire your `bridgePartner`s, and + hold any sweepable gas prepay. The platform never owns your token. + +So "Safe-governed" refers to the *registry + oracle*; token ownership is always +the issuer's. (If you run your own instance, you happen to own both layers.) + +## Two ways to run it + +### A. Your own instance (permissionless, recommended) + +You deploy and govern everything — your own oracle account, registry, tokens, and +relayer. No dependency on anyone else. This is the permissionless path and the +one the scripts are built for. + +You will own: +- a **Lit account** (the signing oracle — start API-key, then chain-secure it to + your Safe; see `docs/upgrading-the-action.md` for the Safe model), +- a **BridgeConfigRegistry** (per-chain RPC config + quorum), +- a **BridgeToken** on each chain, +- the **relayer** (lit-triggers chain-event triggers + `retryPoller.js`). + +### B. Use a shared deployment + +If an operator already runs a lit-bridge oracle + registry for your chains, you +can deploy `BridgeToken`s pinned to *their* oracle address and ask them to add +your tokens to their relayer. Lighter, but you depend on that operator for +relaying and for adding new chains to their registry. Most issuers should prefer +A. + +## Launching your own (path A) + +Prerequisites: +- A master **Lit API key** (`dashboard.chipotle.litprotocol.com`). +- A **deployer EOA** funded on every target chain. +- **Alchemy + Infura API keys** (two independent providers → quorum 2). Each + default chain ships with both; the keys are encrypted and stored in the + registry, never exposed. + +Steps: +1. `cp lit-bridge/.env.example lit-bridge/.env` and fill in the required keys. + Set `FEE_TREASURY`, `FEE_BPS` (default 0.1%), `CHAIN_QUORUM` (default 2), + `INITIAL_SUPPLY` / `INITIAL_SUPPLY_NETWORK` (the home chain that gets supply). +2. `cd lit-bridge/scripts && npm install`. +3. `node setup.js` — deploys the registry (on Base), creates the oracle account + + PKP, encrypts your RPC keys against it, writes per-chain config, deploys a + `BridgeToken` on each chain, wires `bridgePartner` both ways, and sets the fee. + It's resumable (writes results to `.env`); re-run if interrupted. (Don't pipe + it through `head` — SIGPIPE kills it mid-run.) +4. **Fund the oracle for gas:** `node fundPkp.js 0.01` (the relayer pays + destination-mint gas from the oracle account). +5. **Stand up the relayer:** authorize an agent with lit-triggers, then + `node registerTriggers.js` (one `chain_event` trigger per chain watching + `BurnInitiated`). Run `node retryPoller.js` continuously (cron `--once` every + ~2 min, or a managed process) to recover any burns the single-fire trigger + misses. +6. **Test:** `node burn.js --amount 5` then `node watchRuns.js `. + +Each holder now bridges with `BridgeToken.burn(amount, destChainId, recipient)` +(attaching a small native gas prepay so the relayer is reimbursed). The relayer +auto-mints on the destination; without a prepay the holder can self-submit +`mint` with the oracle signature and pay their own gas. + +## Adding a new chain + +A chain needs two things in the action: + +1. **An RPC the action can build.** For chains in the action's `ALCHEMY_SUBDOMAINS` + / `INFURA_NETWORKS` maps (Ethereum, Base, Arbitrum, Optimism, Polygon, + + testnets), you just supply the API key. For any other chain, use a **`custom`** + registry entry: store the plaintext host + the encrypted full RPC URL; the + action verifies the decrypted URL's host matches. Adding a chain to the + alchemy/infura maps is a code change (→ new action CID → re-pin via the Safe; + see `docs/upgrading-the-action.md`); a `custom` entry is pure config. +2. **A registry entry** (`setChain(chainId, minConfirmations, quorum, rpcs)`) and a + `BridgeToken` deployed there, wired to its siblings via `bridgePartner`. With a + chain-secured account these are Safe-governed writes. + +Notes: +- **Quorum ≥ 2 with independent providers.** Quorum 1 is an escape hatch for a + chain only one provider covers, but it drops to single-RPC trust — avoid it for + anything with value. +- **Same native asset for auto-relay.** The relayer's gas-prepay check compares + source-prepaid wei to destination-gas wei 1:1, so auto-relay is only enabled + between chains with the same native token (all ETH-native L2s today). A + cross-native pair (e.g. an ETH chain ↔ Polygon) needs an exchange-rate step — + not built yet; such pairs can still bridge via manual submission. +- **Confirmations / finality.** `minConfirmations` is per-chain and + Safe-governed; set it conservatively for chains with deeper reorg risk. The + retry poller keeps re-attempting until a burn is final and minted. + +## The trust model in one paragraph + +A mint is honored only if: the published action code (its CID) is what runs; the +Lit node network executes it honestly in-TEE; the Safe-governed registry config +wasn't maliciously changed; M-of-N independent RPCs agree on the burn; and TLS to +those RPCs holds. You are trading a validator set for "audited action + node +network + your Safe + RPC consensus." Adding a chain is a config write, not a new +validator quorum to bootstrap — that's the whole point. diff --git a/lit-bridge/docs/upgrading-the-action.md b/lit-bridge/docs/upgrading-the-action.md new file mode 100644 index 00000000..66ab3e58 --- /dev/null +++ b/lit-bridge/docs/upgrading-the-action.md @@ -0,0 +1,118 @@ +# Upgrading the bridge action (Safe-governed) + +The lit-bridge signing account is **chain-secured** and owned by the **Base Safe**. +The verification action's IPFS CID is the unit of trust: to ship a new action you +must **re-pin the new CID to the permission group**, and that's an admin write on +the on-chain account-config diamond — which only the Safe can authorize. + +This runbook is the result of getting it wrong once (a `GS013` revert). Follow it +and the next upgrade lands the first time. + +## Why it's not just "edit and redeploy" + +- The relayer + manual callers execute the action under a **scoped usage key**. + The usage key may only run **CIDs pinned to its group**. Change the action by a + byte → new CID → it won't run until the new CID is pinned. +- Pinning (`addActionToGroup`) is an **admin write**. The account is chain-secured, + so the only authorized `msg.sender` is the **Safe** (the account admin). +- The signer (oracle) address does **not** change on an action upgrade (Option B: + the oracle is the account PKP, not the CID). So **no contract redeploy** is + needed for an action-only change — just the re-pin + trigger re-registration. + +## Key facts / addresses + +| Thing | Value | +|---|---| +| Account-config diamond (Base) | `0xaAaAA9120fE271F653cfDb6bf400dB93D2DEa7Aa` (from `GET /core/v1/get_node_chain_config`) | +| Base Safe (account admin) | `0xF4D05744acE4ea008D9A79C9841a621C4a39fD2A` — threshold 1, owner `0x5c011a580164E9ab600A1544c08067440138b865` | +| Proposer (Safe delegate) | `0x484635Ffbb5355f444a07C7F568Ae7D123Fa7862` — key in `.context/.env` `SAFE_PROPOSER_KEY` | +| Group id | `1` | +| Safe Transaction Service | `https://safe-transaction-base.safe.global` | +| `apiKeyHash` (master) | `uint256(keccak256(utf8(LIT_API_KEY)))` — already public on-chain | +| `cidHash` | `uint256(keccak256(utf8(cidString)))` | + +## The runbook + +1. **Edit + unit-test the action.** `cd lit-bridge/action && node --test`. Keep the + pure helpers testable; the CID changes on any byte change. +2. **If you changed the `BurnInitiated` event signature**, propagate the new + signature to `scripts/{burn,relay,bridge}.js` (the topic used for log lookup) + **and** `scripts/registerTriggers.js` `BURN_EVENT`. Miss one and the poller + silently never matches (no error, just no relays). +3. **Propose the re-pin** (rebuilds the action, computes the CID, signs a SafeTx + with the delegate key, POSTs to the Safe Tx Service): + ```sh + cd lit-bridge/scripts && node proposeRepin.js + ``` + It prints the new CID, the `safeTxHash`, and the Safe queue link. +4. **Owner executes.** The delegate can only *propose*; the **owner** (`0x5c01`) + opens the queued tx in the Safe UI and executes (threshold 1 → one signature). + - If you re-proposed (e.g. to fix a bad tx), there may be **multiple txs at the + same nonce** — execute the correct one (its "Simulate" passes) and reject the + stale one. Executing one invalidates the others at that nonce. +5. **Verify the pin on-chain:** + ```sh + # groupIdsForAction(masterHash, newCidHash) should include 1 + ``` + (proposeRepin prints the CID; reuse the verify snippet in this repo's history, + or call `groupIdsForAction` on the diamond.) +6. **Re-register the triggers** with the new action code (uses the usage key + + agent token — **no Safe needed**): + ```sh + TOKEN=$(cat ~/.lit-triggers/agent-token) + # delete existing triggers, then: + TRIGGERS_BASE=https://triggers.litprotocol.com TRIGGERS_AGENT_TOKEN="$TOKEN" node registerTriggers.js + ``` +7. **End-to-end test:** `node burn.js --amount 5` then + `node watchRuns.js ` → confirm the auto-mint. + +## Critical gotchas (read before you propose) + +- **Use the MASTER `apiKeyHash`, NOT the `keccak256(Safe)` alias.** `addActionToGroup` + only skips the per-group "manage IPFS IDs" permission check when + `apiKeyHash == masterHash`. The alias trips that check → custom error + `0xc5a2be52` → the Safe reverts with **`GS013`** (inner call failed, since + `safeTxGas`/`gasPrice` are 0). `proposeRepin.js` uses the master hash. The master + hash is just a hash already on-chain (account key + event topic) — not a secret. +- **The proposer key must be a registered Safe delegate.** Adding it is an + owner-signed action (Safe UI → Settings → Proposers/Delegates, or the Safe Tx + Service `/delegates/` endpoint). Without it, proposals 422 with + `Sender ... is not an owner or delegate`. +- **Simulate with `estimateGas` (from = Safe), not `eth_call`.** `addActionToGroup` + returns nothing; `eth_call` returns `0x` and hides reverts. `estimateGas` + surfaces them. (This is exactly how the `GS013` cause was found.) +- **The executor needs gas.** Threshold-1 single-owner Safe → only the owner can + execute; make sure the owner address is funded on Base. The delegate/proposer + does not pay gas and need not be funded. +- **The registry read needs ≥3 reliable keyless endpoints (quorum 2).** It's + M-of-N over the `registryRpcUrls` you pass; with only 2 keyless endpoints, one + rate-limiting under the burst (getChain + getRpc per chain per provider) drops + you to 1 vote → `only 1 provider voted; need quorum 2`. Use these (verified + 8/8 under burst): `base-rpc.publicnode.com`, `1rpc.io/base`, + `gateway.tenderly.co/public/base`. Avoid `mainnet.base.org` (flaky), `drpc.org`, + `meowrpc`, `blockpi` (rate-limit/fail). The action retries each call 5× with + backoff, but reliable endpoints + a 3rd for slack is what makes it solid. +- **Re-pin is additive.** The old CID stays pinned until you + `removeActionFromGroup` it. Harmless (the triggers run the new code), but you can + clean up old CIDs. +- **Don't pipe `setup.js` through `head`** — SIGPIPE kills it mid-run. It's + resumable (writes to `.env` per step), so just re-run if interrupted. + +## Same flow for the registry / tokens + +`BridgeConfigRegistry` and the `BridgeToken`s are `Ownable2Step` owned by the same +Safe. Owner-only writes there (`setChain`, `setFeeConfig`, `setBridgePartner`, +`sweepGas`, `transferOwnership`) are ordinary Safe transactions — build the +calldata and propose it the same way (`proposeRepin.js` is a template: swap the +`to`/calldata). These are *contract* calls (not the Lit diamond), so no +`apiKeyHash` subtlety — just the normal Safe propose → owner execute. + +**The handoff is two-step + per-chain.** `handoffToSafe.js` does +`transferOwnership(Safe)` (sets `pendingOwner`); the Safe then calls +`acceptOwnership()` — propose those with `proposeAccepts.js`. CRITICAL: **a Safe +exists per chain.** If you `transferOwnership` a contract on chain X to a Safe +address that was only deployed on chain Y, nothing can accept it on X (no code at +that address). Before handing off a contract, deploy the same Safe address on its +chain (Safe{Wallet} → Add network) and register the proposer as a delegate on +that chain's Safe Transaction Service. `proposeAccepts.js` checks for the Safe per +chain and skips (with a warning) any chain where it's missing. diff --git a/lit-bridge/railway.json b/lit-bridge/railway.json new file mode 100644 index 00000000..da520631 --- /dev/null +++ b/lit-bridge/railway.json @@ -0,0 +1,15 @@ +{ + "$schema": "https://railway.app/railway.schema.json", + "build": { + "builder": "DOCKERFILE", + "dockerfilePath": "lit-bridge/Dockerfile" + }, + "deploy": { + "healthcheckPath": "/health", + "healthcheckTimeout": 300, + "restartPolicyType": "ON_FAILURE", + "restartPolicyMaxRetries": 10, + "sleepApplication": false, + "numReplicas": 1 + } +} diff --git a/lit-bridge/scripts/_env.js b/lit-bridge/scripts/_env.js new file mode 100644 index 00000000..ed33f37b --- /dev/null +++ b/lit-bridge/scripts/_env.js @@ -0,0 +1,38 @@ +// Minimal .env reader / upserter shared across the lit-bridge scripts. +// Reads/writes lit-bridge/.env (one level up from scripts/). + +const fs = require("fs"); +const path = require("path"); + +const ENV_PATH = path.join(__dirname, "..", ".env"); + +function load() { + if (!fs.existsSync(ENV_PATH)) return; + for (const line of fs.readFileSync(ENV_PATH, "utf8").split("\n")) { + const m = line.match(/^\s*([A-Z_][A-Z0-9_]*)\s*=\s*(.*?)\s*$/); + if (!m) continue; + // Pre-existing process env wins so CLI callers can override. + if (!process.env[m[1]]) { + process.env[m[1]] = m[2].replace(/^["']|["']$/g, ""); + } + } +} + +function upsert(key, value) { + const text = fs.existsSync(ENV_PATH) ? fs.readFileSync(ENV_PATH, "utf8") : ""; + const line = `${key}=${value}`; + const re = new RegExp(`^${key}\\s*=.*$`, "m"); + let next; + if (re.test(text)) { + next = text.replace(re, line); + } else { + next = + text.endsWith("\n") || text.length === 0 + ? text + line + "\n" + : text + "\n" + line + "\n"; + } + fs.writeFileSync(ENV_PATH, next); + process.env[key] = value; +} + +module.exports = { load, upsert, ENV_PATH }; diff --git a/lit-bridge/scripts/bridge.js b/lit-bridge/scripts/bridge.js new file mode 100644 index 00000000..f3ddd378 --- /dev/null +++ b/lit-bridge/scripts/bridge.js @@ -0,0 +1,122 @@ +// End-to-end transfer: burn on the source chain, run the bridge action (which +// reads config from the registry, reaches M-of-N consensus across Alchemy + +// Infura, and signs), then submit the mint on the destination chain. +// +// Usage: +// node bridge.js [--from baseSepolia|arbitrumSepolia] [--to ...] [--amount 25] [--recipient 0x..] +// Defaults: Base Sepolia -> Arbitrum Sepolia, 25 tokens, recipient = deployer. + +const fs = require("fs"); +const path = require("path"); +const { ethers } = require("ethers"); +const env = require("./_env"); +const lit = require("./lit"); + +const BUILT_ACTION = path.join(__dirname, "..", "action", "bridgeAction.built.js"); + +function loadArtifact(name) { + const p = path.join(__dirname, "..", "contracts", "out", `${name}.sol`, `${name}.json`); + return JSON.parse(fs.readFileSync(p, "utf8")); +} + +function arg(flag, def) { + const i = process.argv.indexOf(flag); + return i !== -1 ? process.argv[i + 1] : def; +} + +const CHAINS = { + base: { id: 8453, name: "Base", tokenEnv: "BRIDGE_TOKEN_BASE_MAINNET", alchemySub: "base-mainnet" }, + arbitrum: { id: 42161, name: "Arbitrum", tokenEnv: "BRIDGE_TOKEN_ARB_MAINNET", alchemySub: "arb-mainnet" }, +}; +const REGISTRY_READ_RPCS = ["https://base-rpc.publicnode.com", "https://1rpc.io/base", "https://gateway.tenderly.co/public/base"]; + +async function main() { + env.load(); + const { LIT_API_BASE = "https://api.chipotle.litprotocol.com", LIT_USAGE_API_KEY } = process.env; + for (const k of ["DEPLOYER_PRIVATE_KEY", "LIT_USAGE_API_KEY", "REGISTRY_ADDRESS"]) { + if (!process.env[k]) throw new Error(`${k} missing — run setup first`); + } + if (!fs.existsSync(BUILT_ACTION)) throw new Error("bridgeAction.built.js missing — run setup first"); + const actionCode = fs.readFileSync(BUILT_ACTION, "utf8"); + + const fromKey = arg("--from", "base"); + const toKey = arg("--to", "arbitrum"); + const src = CHAINS[fromKey], dst = CHAINS[toKey]; + if (!src || !dst || src === dst) throw new Error("bad --from/--to"); + + const minConf = Math.max(Number(process.env.MIN_CONFIRMATIONS || 5), 2); + const amount = ethers.utils.parseUnits(arg("--amount", "25"), 18); + + const A = process.env.ALCHEMY_API_KEY; + const srcProvider = new ethers.providers.JsonRpcProvider(`https://${src.alchemySub}.g.alchemy.com/v2/${A}`); + const dstProvider = new ethers.providers.JsonRpcProvider(`https://${dst.alchemySub}.g.alchemy.com/v2/${A}`); + const srcSigner = new ethers.Wallet(process.env.DEPLOYER_PRIVATE_KEY, srcProvider); + const dstSigner = new ethers.Wallet(process.env.DEPLOYER_PRIVATE_KEY, dstProvider); + const recipient = arg("--recipient", await srcSigner.getAddress()); + + const tokenAbi = loadArtifact("BridgeToken").abi; + const srcToken = new ethers.Contract(process.env[src.tokenEnv], tokenAbi, srcSigner); + const dstToken = new ethers.Contract(process.env[dst.tokenEnv], tokenAbi, dstSigner); + + // 1. Burn ---------------------------------------------------------------- + console.log(`Burning ${arg("--amount", "25")} on ${src.name} -> ${dst.name} (recipient ${recipient})...`); + const burnTx = await srcToken.burn(amount, dst.id, recipient); + const burnRcpt = await burnTx.wait(); + console.log(` burn tx: ${burnTx.hash} (block ${burnRcpt.blockNumber})`); + + // Find the BurnInitiated log's block-level logIndex. + const burnTopic = ethers.utils.id("BurnInitiated(address,address,uint256,uint256,uint256,uint256)"); + const log = burnRcpt.logs.find( + (l) => l.address.toLowerCase() === srcToken.address.toLowerCase() && + (l.topics[0] || "").toLowerCase() === burnTopic.toLowerCase() + ); + if (!log) throw new Error("BurnInitiated log not found in receipt"); + const logIndex = log.logIndex; + + // 2. Wait for finality (the action checks each provider independently) ---- + console.log(` waiting for ${minConf} confirmations...`); + while ((await srcProvider.getBlockNumber()) - burnRcpt.blockNumber < minConf) { + await new Promise((r) => setTimeout(r, 2000)); + } + + // 3. Run the bridge action ----------------------------------------------- + console.log(" running bridge action (consensus across Alchemy + Infura)..."); + const deadline = Math.floor(Date.now() / 1000) + 3600; + // destChainId + destContract are resolved by the action from the source + // token's bridgePartner (not passed in), so they can't be spoofed here. + const resp = await lit.runAction(LIT_API_BASE, LIT_USAGE_API_KEY, actionCode, { + burnTxHash: burnTx.hash, + srcChainId: src.id, + srcContract: srcToken.address, + logIndex, + deadline, + registryRpcUrls: REGISTRY_READ_RPCS, + }); + if (!resp || !resp.authorized) { + throw new Error(`action did not authorize: ${JSON.stringify(resp)}`); + } + if (resp.destContract.toLowerCase() !== dstToken.address.toLowerCase()) { + throw new Error(`action resolved destContract ${resp.destContract} != expected ${dstToken.address}`); + } + console.log(` authorized by oracle ${resp.signer} (quorum ${resp.quorum}); dest ${resp.destContract}`); + + // 4. Mint on destination ------------------------------------------------- + console.log(` submitting mint on ${dst.name}...`); + const before = await dstToken.balanceOf(recipient); + const mintTx = await dstToken.mint( + src.id, srcToken.address, burnTx.hash, logIndex, recipient, + resp.amount, resp.srcNonce, deadline, resp.signature + ); + await mintTx.wait(); + const after = await dstToken.balanceOf(recipient); + + console.log(` mint tx: ${mintTx.hash}`); + console.log(`\n✓ Transfer complete.`); + console.log(` ${dst.name} balance: ${ethers.utils.formatUnits(before, 18)} -> ${ethers.utils.formatUnits(after, 18)}`); +} + +main().catch((err) => { + console.error("\nBridge failed:", err.message); + if (err.body) console.error("Server said:", JSON.stringify(err.body)); + process.exit(1); +}); diff --git a/lit-bridge/scripts/buildAction.js b/lit-bridge/scripts/buildAction.js new file mode 100644 index 00000000..07000209 --- /dev/null +++ b/lit-bridge/scripts/buildAction.js @@ -0,0 +1,40 @@ +// Produce the deployable bridge action by injecting the deploy-time trust-root +// constants (REGISTRY_ADDRESS, BRIDGE_PKP_ID) into the source. These ARE part +// of the CID by design — REGISTRY_ADDRESS is the trust root and changing the +// PKP changes the CID. The built file is environment-specific (gitignored); the +// committed bridgeAction.js keeps placeholders so its pure helpers stay unit- +// testable. + +const fs = require("fs"); +const path = require("path"); + +const SRC = path.join(__dirname, "..", "action", "bridgeAction.js"); +const OUT = path.join(__dirname, "..", "action", "bridgeAction.built.js"); + +function buildAction(registryAddress, pkpId) { + let code = fs.readFileSync(SRC, "utf8"); + + const before = code; + code = code.replace( + /const REGISTRY_ADDRESS = "0x0000000000000000000000000000000000000000";.*$/m, + `const REGISTRY_ADDRESS = "${registryAddress}";` + ); + code = code.replace( + /const BRIDGE_PKP_ID = "REPLACE_WITH_PKP_ID";/, + `const BRIDGE_PKP_ID = "${pkpId}";` + ); + + if (code === before || code.includes("REPLACE_WITH_PKP_ID")) { + throw new Error( + "buildAction: failed to inject constants — placeholders not found in bridgeAction.js" + ); + } + if (!code.includes(`"${registryAddress}"`) || !code.includes(`"${pkpId}"`)) { + throw new Error("buildAction: injected constants missing after replace"); + } + + fs.writeFileSync(OUT, code); + return code; +} + +module.exports = { buildAction, BUILT_PATH: OUT }; diff --git a/lit-bridge/scripts/burn.js b/lit-bridge/scripts/burn.js new file mode 100644 index 00000000..4656e12e --- /dev/null +++ b/lit-bridge/scripts/burn.js @@ -0,0 +1,50 @@ +// Burn only — to test the LIVE lit-triggers relayer. After this, the triggers +// poller should observe the BurnInitiated event and auto-mint on the other +// chain (watch with: node watchRuns.js or the /api/triggers//runs endpoint). +// +// Usage: node burn.js [--from base] [--to arbitrum] [--amount 5] [--recipient 0x..] + +const fs = require("fs"); +const path = require("path"); +const { ethers } = require("ethers"); +const env = require("./_env"); + +function loadAbi(name) { + const p = path.join(__dirname, "..", "contracts", "out", `${name}.sol`, `${name}.json`); + return JSON.parse(fs.readFileSync(p, "utf8")).abi; +} +function arg(flag, def) { + const i = process.argv.indexOf(flag); + return i !== -1 ? process.argv[i + 1] : def; +} + +const CHAINS = { + base: { id: 8453, name: "Base", tokenEnv: "BRIDGE_TOKEN_BASE_MAINNET", alchemySub: "base-mainnet" }, + arbitrum: { id: 42161, name: "Arbitrum", tokenEnv: "BRIDGE_TOKEN_ARB_MAINNET", alchemySub: "arb-mainnet" }, +}; + +async function main() { + env.load(); + const src = CHAINS[arg("--from", "base")]; + const dst = CHAINS[arg("--to", "arbitrum")]; + const amount = ethers.utils.parseUnits(arg("--amount", "5"), 18); + const A = process.env.ALCHEMY_API_KEY; + const provider = new ethers.providers.JsonRpcProvider(`https://${src.alchemySub}.g.alchemy.com/v2/${A}`); + const dstProvider = new ethers.providers.JsonRpcProvider(`https://${dst.alchemySub}.g.alchemy.com/v2/${A}`); + const signer = new ethers.Wallet(process.env.DEPLOYER_PRIVATE_KEY, provider); + const recipient = arg("--recipient", await signer.getAddress()); + const token = new ethers.Contract(process.env[src.tokenEnv], loadAbi("BridgeToken"), signer); + + // Prepay the relayer's destination gas (native). 2x buffer over the action's + // quote (gasPrice * 250k) to absorb gas drift between burn and mint. + const prepay = (await dstProvider.getGasPrice()).mul(300000).mul(2); // covers action MINT_GAS_LIMIT (300k) + buffer + console.log(`Burning ${arg("--amount", "5")} on ${src.name} -> ${dst.name} (recipient ${recipient}); gas prepay ${ethers.utils.formatEther(prepay)} ETH...`); + const rcpt = await (await token.burn(amount, dst.id, recipient, { value: prepay })).wait(); + const topic = ethers.utils.id("BurnInitiated(address,address,uint256,uint256,uint256,uint256)"); + const log = rcpt.logs.find((l) => l.address.toLowerCase() === token.address.toLowerCase() && (l.topics[0] || "").toLowerCase() === topic.toLowerCase()); + console.log(` burn tx ${rcpt.transactionHash} (block ${rcpt.blockNumber}, log ${log.logIndex})`); + console.log(`\nNow the lit-triggers poller should auto-mint on ${dst.name} within ~1 min`); + console.log(`(after CHAIN_CONFIRMATION_DEPTH blocks + poll interval). Watch the trigger runs.`); +} + +main().catch((e) => { console.error("burn failed:", e.message); process.exit(1); }); diff --git a/lit-bridge/scripts/fundPkp.js b/lit-bridge/scripts/fundPkp.js new file mode 100644 index 00000000..d6db6057 --- /dev/null +++ b/lit-bridge/scripts/fundPkp.js @@ -0,0 +1,37 @@ +// Fund the oracle PKP with gas on both chains so it can broadcast mints in +// relay mode. Usage: node fundPkp.js [amountEth] (default 0.005 per chain). +// Skips a chain if the oracle already holds >= amount. + +const { ethers } = require("ethers"); +const env = require("./_env"); + +async function main() { + env.load(); + if (!process.env.ORACLE_ADDRESS) throw new Error("ORACLE_ADDRESS missing — run setup first"); + const oracle = process.env.ORACLE_ADDRESS; + const amount = ethers.utils.parseEther(process.argv[2] || "0.005"); + + const A = process.env.ALCHEMY_API_KEY; + const chains = [ + { name: "Base", rpc: `https://base-mainnet.g.alchemy.com/v2/${A}` }, + { name: "Arbitrum", rpc: `https://arb-mainnet.g.alchemy.com/v2/${A}` }, + ]; + + for (const c of chains) { + const provider = new ethers.providers.JsonRpcProvider(c.rpc); + const signer = new ethers.Wallet(process.env.DEPLOYER_PRIVATE_KEY, provider); + const bal = await provider.getBalance(oracle); + if (bal.gte(amount)) { + console.log(`${c.name}: oracle has ${ethers.utils.formatEther(bal)} ETH — skip`); + continue; + } + const tx = await signer.sendTransaction({ to: oracle, value: amount }); + await tx.wait(); + console.log(`${c.name}: funded oracle ${oracle} with ${ethers.utils.formatEther(amount)} ETH -> ${tx.hash}`); + } +} + +main().catch((e) => { + console.error("fundPkp failed:", e.message); + process.exit(1); +}); diff --git a/lit-bridge/scripts/handoffToSafe.js b/lit-bridge/scripts/handoffToSafe.js new file mode 100644 index 00000000..e0077cd5 --- /dev/null +++ b/lit-bridge/scripts/handoffToSafe.js @@ -0,0 +1,58 @@ +// Platform governance handoff: give the BridgeConfigRegistry to the Base Safe. +// +// The registry is the ONLY shared, platform-level contract — it holds the +// per-chain RPC config + quorum that the oracle trusts for EVERY token bridged +// here, so the Safe should govern it. Token contracts are per-issuer (each +// issuer owns their own BridgeToken); they are NOT handed off by this script. +// +// Ownable2Step, so this only PROPOSES the transfer (sets pendingOwner = Safe); +// the Safe then calls acceptOwnership() — propose that with proposeAccepts.js. +// Idempotent: if the registry is already Safe-owned, it's a no-op. +// +// Run as the current registry owner (deployer). Required in .env: +// SAFE_ADDRESS, DEPLOYER_PRIVATE_KEY, REGISTRY_ADDRESS, ALCHEMY_API_KEY + +const fs = require("fs"); +const path = require("path"); +const { ethers } = require("ethers"); +const env = require("./_env"); + +function abiOf(name) { + const p = path.join(__dirname, "..", "contracts", "out", `${name}.sol`, `${name}.json`); + return JSON.parse(fs.readFileSync(p, "utf8")).abi; +} + +async function main() { + env.load(); + const safe = process.env.SAFE_ADDRESS; + if (!safe || !ethers.utils.isAddress(safe)) throw new Error("SAFE_ADDRESS missing/invalid"); + for (const k of ["DEPLOYER_PRIVATE_KEY", "REGISTRY_ADDRESS"]) { + if (!process.env[k]) throw new Error(`${k} missing`); + } + const A = process.env.ALCHEMY_API_KEY; + const base = new ethers.Wallet( + process.env.DEPLOYER_PRIVATE_KEY, + new ethers.providers.JsonRpcProvider(`https://base-mainnet.g.alchemy.com/v2/${A}`) + ); + const registry = new ethers.Contract(process.env.REGISTRY_ADDRESS, abiOf("BridgeConfigRegistry"), base); + + const owner = await registry.owner(); + if (owner.toLowerCase() === safe.toLowerCase()) { + console.log("Registry is already owned by the Safe — nothing to do."); + return; + } + const pending = await registry.pendingOwner(); + if (pending.toLowerCase() === safe.toLowerCase()) { + console.log(`Registry transfer already proposed (pendingOwner = Safe). Have the Safe run acceptOwnership() (proposeAccepts.js).`); + return; + } + + console.log("Proposing registry ownership -> Safe (two-step; Safe must acceptOwnership)..."); + const tx = await registry.transferOwnership(safe); + await tx.wait(); + console.log(` transferOwnership(${safe}) -> ${tx.hash}`); + console.log("\nNext: the Safe calls acceptOwnership() on the registry (run proposeAccepts.js)."); + console.log("Until accepted, the deployer remains owner (nothing lost if the Safe address was wrong)."); +} + +main().catch((e) => { console.error("\nhandoffToSafe failed:", e.message); process.exit(1); }); diff --git a/lit-bridge/scripts/lit.js b/lit-bridge/scripts/lit.js new file mode 100644 index 00000000..8a03cbb1 --- /dev/null +++ b/lit-bridge/scripts/lit.js @@ -0,0 +1,140 @@ +// Lit Chipotle REST helpers, shared by setup.js and bridge.js. +// Mirrors the patterns in examples/dark-pool/scripts/setup.js. + +async function call(base, apiKey, p, init = {}) { + const res = await fetch(`${base}/core/v1/${p}`, { + ...init, + headers: { + "X-Api-Key": apiKey, + "Content-Type": "application/json", + ...(init.headers || {}), + }, + }); + const body = await res.json(); + if (!res.ok) { + const msg = body.message || body.error || JSON.stringify(body); + const err = new Error(`${p} -> ${res.status}: ${msg}`); + err.body = body; + throw err; + } + return body; +} + +// Compute an action's IPFS CID without publishing it. +async function getActionCid(base, apiKey, code) { + return call(base, apiKey, "get_lit_action_ipfs_id", { + method: "POST", + body: JSON.stringify(code), + }); +} + +// Execute an action by inline code. The server computes the code's CID and (for +// a scoped usage key) checks it against the key's group allowlist before +// running. Returns the action's `response` (throws on action error). +async function runAction(base, apiKey, code, jsParams) { + const body = await call(base, apiKey, "lit_action", { + method: "POST", + body: JSON.stringify({ code, js_params: jsParams }), + }); + if (body.has_error) { + throw new Error(`action error: ${body.logs || JSON.stringify(body)}`); + } + return body.response; +} + +// Create a managed PKP wallet. Returns its address (used as the pkpId). +async function createWallet(base, apiKey) { + const body = await call(base, apiKey, "create_wallet", { method: "GET" }); + if (!body.wallet_address) { + throw new Error(`create_wallet returned no address: ${JSON.stringify(body)}`); + } + return body.wallet_address; +} + +async function addGroup(base, apiKey, name, description) { + const body = await call(base, apiKey, "add_group", { + method: "POST", + body: JSON.stringify({ + group_name: name, + group_description: description, + pkp_ids_permitted: [], + // No wildcard — specific CIDs are pinned via add_action_to_group, so the + // scoped usage key can only run audited code against the PKP. + cid_hashes_permitted: [], + }), + }); + return body.group_id; +} + +async function addPkpToGroup(base, apiKey, groupId, pkpId) { + return call(base, apiKey, "add_pkp_to_group", { + method: "POST", + body: JSON.stringify({ group_id: Number(groupId), pkp_id: pkpId }), + }); +} + +async function addAction(base, apiKey, cid, name, description) { + return call(base, apiKey, "add_action", { + method: "POST", + body: JSON.stringify({ action_ipfs_cid: cid, name, description }), + }); +} + +async function addActionToGroup(base, apiKey, groupId, cid) { + return call(base, apiKey, "add_action_to_group", { + method: "POST", + body: JSON.stringify({ group_id: Number(groupId), action_ipfs_cid: cid }), + }); +} + +async function createUsageApiKey(base, apiKey, groupId, name, description) { + const body = await call(base, apiKey, "add_usage_api_key", { + method: "POST", + body: JSON.stringify({ + name, + description, + can_create_groups: false, + can_delete_groups: false, + can_create_pkps: false, + manage_ipfs_ids_in_groups: [], + add_pkp_to_groups: [], + remove_pkp_from_groups: [], + execute_in_groups: [Number(groupId)], + }), + }); + if (!body.usage_api_key) { + throw new Error(`add_usage_api_key returned no key: ${JSON.stringify(body)}`); + } + return body.usage_api_key; +} + +// Inline setup-only helper actions (auditable here). +const ENCRYPT_SECRET_CODE = ` + async function main({ pkpId, message }) { + const ciphertext = await Lit.Actions.Encrypt({ pkpId, message }); + return { ciphertext }; + } +`; + +// Derives the address of the key the bridge action will SIGN with (Option B), +// so the oracle pinned in BridgeToken matches exactly what signs the mint. +const SIGNER_DERIVER_CODE = ` + async function main({ pkpId }) { + const wallet = new ethers.Wallet(await Lit.Actions.getPrivateKey({ pkpId })); + return { address: wallet.address }; + } +`; + +module.exports = { + call, + getActionCid, + runAction, + createWallet, + addGroup, + addPkpToGroup, + addAction, + addActionToGroup, + createUsageApiKey, + ENCRYPT_SECRET_CODE, + SIGNER_DERIVER_CODE, +}; diff --git a/lit-bridge/scripts/package-lock.json b/lit-bridge/scripts/package-lock.json new file mode 100644 index 00000000..47ad34b6 --- /dev/null +++ b/lit-bridge/scripts/package-lock.json @@ -0,0 +1,894 @@ +{ + 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index 00000000..c34c0185 --- /dev/null +++ b/lit-bridge/scripts/package.json @@ -0,0 +1,14 @@ +{ + "name": "lit-bridge-scripts", + "version": "0.0.1", + "private": true, + "description": "Setup + end-to-end scripts for lit-bridge (deploy, configure registry, run a transfer).", + "scripts": { + "setup": "node setup.js", + "bridge": "node bridge.js" + }, + "dependencies": { + "dotenv": "^16.4.5", + "ethers": "^5.7.2" + } +} diff --git a/lit-bridge/scripts/proposeAccepts.js b/lit-bridge/scripts/proposeAccepts.js new file mode 100644 index 00000000..3910dbdb --- /dev/null +++ b/lit-bridge/scripts/proposeAccepts.js @@ -0,0 +1,103 @@ +// Propose the Ownable2Step acceptOwnership() Safe tx that completes the platform +// governance handoff: the BridgeConfigRegistry -> Safe. transferOwnership was +// already done by handoffToSafe.js (sets pendingOwner = Safe); this proposes the +// Safe's acceptance. Only proposes if a Safe actually exists at the address on the +// registry chain (Safes are per-chain; a missing Safe means the handoff is stuck +// until the Safe is deployed there). +// +// The registry is the ONLY platform-owned contract — BridgeToken contracts are +// per-issuer and handed off (if at all) by their own issuers, so they are NOT +// proposed here. (Keep this in lockstep with handoffToSafe.js, which is also +// registry-only.) +// +// Signs each SafeTx with the proposer/delegate key and POSTs to the chain's Safe +// Transaction Service. The Safe owner then executes. + +const { ethers } = require("ethers"); +const fs = require("fs"); +const path = require("path"); +const env = require("./_env"); + +const SAFE_TX_SERVICE = { + 8453: "https://safe-transaction-base.safe.global", + 42161: "https://safe-transaction-arbitrum.safe.global", +}; +const ACCEPT = new ethers.utils.Interface(["function acceptOwnership()"]).encodeFunctionData("acceptOwnership", []); + +async function proposeSafeTx(service, safe, chainId, proposer, to, data, nonce, origin) { + const domain = { chainId, verifyingContract: safe }; + const types = { + SafeTx: [ + { name: "to", type: "address" }, { name: "value", type: "uint256" }, + { name: "data", type: "bytes" }, { name: "operation", type: "uint8" }, + { name: "safeTxGas", type: "uint256" }, { name: "baseGas", type: "uint256" }, + { name: "gasPrice", type: "uint256" }, { name: "gasToken", type: "address" }, + { name: "refundReceiver", type: "address" }, { name: "nonce", type: "uint256" }, + ], + }; + const message = { + to, value: 0, data, operation: 0, safeTxGas: 0, baseGas: 0, gasPrice: 0, + gasToken: ethers.constants.AddressZero, refundReceiver: ethers.constants.AddressZero, nonce, + }; + const safeTxHash = ethers.utils._TypedDataEncoder.hash(domain, types, message); + const signature = await proposer._signTypedData(domain, types, message); + const body = { + to, value: "0", data, operation: 0, safeTxGas: "0", baseGas: "0", gasPrice: "0", + gasToken: ethers.constants.AddressZero, refundReceiver: ethers.constants.AddressZero, nonce, + contractTransactionHash: safeTxHash, sender: ethers.utils.getAddress(proposer.address), + signature, origin, + }; + const res = await fetch(`${service}/api/v1/safes/${safe}/multisig-transactions/`, { + method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(body), + }); + return { status: res.status, safeTxHash, text: await res.text() }; +} + +async function main() { + env.load(); + const SAFE = ethers.utils.getAddress(process.env.SAFE_ADDRESS); + const A = process.env.ALCHEMY_API_KEY; + const ctx = fs.readFileSync(path.join(__dirname, "..", "..", ".context", ".env"), "utf8"); + const pk = (ctx.match(/^SAFE_PROPOSER_KEY=(.*)$/m) || [])[1]?.trim(); + if (!pk) throw new Error("SAFE_PROPOSER_KEY missing"); + const proposer = new ethers.Wallet(pk); + + // The platform-owned contract whose ownership should land at the Safe. Just the + // registry — tokens are per-issuer (see header). transferOwnership for these was + // proposed by handoffToSafe.js; proposing acceptOwnership for anything it didn't + // transfer would just queue a Safe tx that reverts (pendingOwner != Safe). + if (!process.env.REGISTRY_ADDRESS) throw new Error("REGISTRY_ADDRESS missing"); + const targets = [ + { chainId: 8453, sub: "base-mainnet", label: "registry (Base)", addr: process.env.REGISTRY_ADDRESS }, + ]; + + // Group by chain so we can assign sequential Safe nonces per chain. + const byChain = {}; + for (const t of targets) (byChain[t.chainId] ||= []).push(t); + + for (const chainId of Object.keys(byChain).map(Number)) { + const sub = byChain[chainId][0].sub; + const provider = new ethers.providers.JsonRpcProvider(`https://${sub}.g.alchemy.com/v2/${A}`); + const code = await provider.getCode(SAFE); + if (code.length <= 2) { + console.log(`\n⚠ chain ${chainId}: NO Safe deployed at ${SAFE} — cannot accept ownership here. Skipping:`); + for (const t of byChain[chainId]) console.log(` - ${t.label} (${t.addr}) stays pending until a Safe exists at ${SAFE} on this chain`); + continue; + } + const service = SAFE_TX_SERVICE[chainId]; + let nonce = (await new ethers.Contract(SAFE, ["function nonce() view returns (uint256)"], provider).nonce()).toNumber(); + for (const t of byChain[chainId]) { + const r = await proposeSafeTx(service, SAFE, chainId, proposer, ethers.utils.getAddress(t.addr), ACCEPT, nonce, + JSON.stringify({ app: "lit-bridge", action: "acceptOwnership", target: t.label })); + if (r.status === 201) { + console.log(`✓ proposed acceptOwnership for ${t.label} @ nonce ${nonce} — safeTxHash ${r.safeTxHash}`); + nonce++; + } else { + console.log(`✗ ${t.label} @ nonce ${nonce}: ${r.status} ${r.text.slice(0, 200)}`); + } + } + console.log(`Execute queued txs: https://app.safe.global/transactions/queue?safe=${chainId === 8453 ? "base" : "arb1"}:${SAFE}`); + } +} + +main().catch((e) => { console.error("proposeAccepts failed:", e.message); process.exit(1); }); diff --git a/lit-bridge/scripts/proposeRepin.js b/lit-bridge/scripts/proposeRepin.js new file mode 100644 index 00000000..96926490 --- /dev/null +++ b/lit-bridge/scripts/proposeRepin.js @@ -0,0 +1,107 @@ +// Propose a Safe transaction that pins the CURRENT bridge action's CID to the +// production group on the chain-secured account-config diamond (Base mainnet). +// +// The account is chain-secured + Safe-owned, so admin writes (addActionToGroup) +// must come from the Safe. This builds the calldata, wraps it in a SafeTx, signs +// it with the proposer key (a Safe delegate), and POSTs it to the Safe +// Transaction Service. The Safe OWNER then executes it from the Safe UI. +// +// Reads SAFE_PROPOSER_KEY from ../../.context/.env; everything else from ../.env. + +const { ethers } = require("ethers"); +const fs = require("fs"); +const path = require("path"); +const env = require("./_env"); +const lit = require("./lit"); +const { buildAction } = require("./buildAction"); + +const SAFE_TX_SERVICE = "https://safe-transaction-base.safe.global"; +const LIT_API_BASE = "https://api.chipotle.litprotocol.com"; + +async function main() { + env.load(); + const SAFE = ethers.utils.getAddress(process.env.SAFE_ADDRESS); + const GROUP = Number(process.env.GROUP_ID); + const usageKey = process.env.LIT_USAGE_API_KEY; + + const ctx = fs.readFileSync(path.join(__dirname, "..", "..", ".context", ".env"), "utf8"); + const pk = (ctx.match(/^SAFE_PROPOSER_KEY=(.*)$/m) || [])[1]?.trim(); + if (!pk) throw new Error("SAFE_PROPOSER_KEY missing in .context/.env"); + const proposer = new ethers.Wallet(pk); + + // Diamond address + chain from the node config. + const cfg = await (await fetch(`${LIT_API_BASE}/core/v1/get_node_chain_config`, { + headers: { "X-Api-Key": usageKey }, + })).json(); + const DIAMOND = ethers.utils.getAddress(cfg.contract_address); + const CHAIN = Number(cfg.chain_id); + + // The CID to pin = the current action build (deterministic). + const code = buildAction(process.env.REGISTRY_ADDRESS, process.env.BRIDGE_PKP_ID); + const cid = await lit.getActionCid(LIT_API_BASE, usageKey, code); + + const u256 = (h) => ethers.BigNumber.from(h); + // Use the MASTER apiKeyHash, NOT the keccak256(Safe) alias: addActionToGroup + // skips the per-group "manage IPFS IDs" permission check only when + // apiKeyHash == masterHash. The alias hash trips that check (custom error + // 0xc5a2be52) since the admin has no explicit per-group manage grant. The + // master hash is already public on-chain (it's the account key + event topic). + const masterHash = u256(ethers.utils.keccak256(ethers.utils.toUtf8Bytes(process.env.LIT_API_KEY))); + const cidHash = u256(ethers.utils.keccak256(ethers.utils.toUtf8Bytes(cid))); + + const iface = new ethers.utils.Interface(["function addActionToGroup(uint256,uint256,uint256)"]); + const data = iface.encodeFunctionData("addActionToGroup", [masterHash, GROUP, cidHash]); + + const A = process.env.ALCHEMY_API_KEY; + const provider = new ethers.providers.JsonRpcProvider(`https://base-mainnet.g.alchemy.com/v2/${A}`); + const nonce = (await new ethers.Contract(SAFE, ["function nonce() view returns (uint256)"], provider).nonce()).toNumber(); + + const domain = { chainId: CHAIN, verifyingContract: SAFE }; + const types = { + SafeTx: [ + { name: "to", type: "address" }, { name: "value", type: "uint256" }, + { name: "data", type: "bytes" }, { name: "operation", type: "uint8" }, + { name: "safeTxGas", type: "uint256" }, { name: "baseGas", type: "uint256" }, + { name: "gasPrice", type: "uint256" }, { name: "gasToken", type: "address" }, + { name: "refundReceiver", type: "address" }, { name: "nonce", type: "uint256" }, + ], + }; + const message = { + to: DIAMOND, value: 0, data, operation: 0, safeTxGas: 0, baseGas: 0, + gasPrice: 0, gasToken: ethers.constants.AddressZero, + refundReceiver: ethers.constants.AddressZero, nonce, + }; + const safeTxHash = ethers.utils._TypedDataEncoder.hash(domain, types, message); + const signature = await proposer._signTypedData(domain, types, message); + + console.log("Action CID to pin:", cid); + console.log("Diamond:", DIAMOND, "| group:", GROUP, "| Safe nonce:", nonce); + console.log("calldata:", data); + console.log("safeTxHash:", safeTxHash); + + const body = { + to: DIAMOND, value: "0", data, operation: 0, safeTxGas: "0", baseGas: "0", + gasPrice: "0", gasToken: ethers.constants.AddressZero, + refundReceiver: ethers.constants.AddressZero, nonce, + contractTransactionHash: safeTxHash, + sender: ethers.utils.getAddress(proposer.address), + signature, + origin: JSON.stringify({ app: "lit-bridge", action: "re-pin hardened action", cid }), + }; + const url = `${SAFE_TX_SERVICE}/api/v1/safes/${SAFE}/multisig-transactions/`; + const res = await fetch(url, { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(body) }); + console.log("\nSafe Tx Service propose status:", res.status); + const txt = await res.text(); + if (res.ok || res.status === 201) { + console.log("✓ Proposed. The Safe owner can now review + execute at:"); + console.log(` https://app.safe.global/transactions/queue?safe=base:${SAFE}`); + } else { + console.log("propose response:", txt.slice(0, 600)); + console.log("\nFallback — owner can execute directly via the Safe UI Transaction Builder:"); + console.log(" to: ", DIAMOND); + console.log(" value: 0"); + console.log(" data: ", data); + } +} + +main().catch((e) => { console.error("proposeRepin failed:", e.message); process.exit(1); }); diff --git a/lit-bridge/scripts/registerTriggers.js b/lit-bridge/scripts/registerTriggers.js new file mode 100644 index 00000000..aeb032b7 --- /dev/null +++ b/lit-bridge/scripts/registerTriggers.js @@ -0,0 +1,89 @@ +// Register the production relayer: two lit-triggers chain_event triggers, one +// per direction. Each watches BurnInitiated on a BridgeToken and runs the +// bridge action in relay mode — the action re-verifies (M-of-N consensus), +// signs, and broadcasts the mint itself. +// +// This is the ONLY part of the relayer that needs a running lit-triggers +// instance + agent authorization. The relay LOGIC is already proven by +// relay.js (which invokes the same action directly). lit-triggers just calls +// this action automatically when a burn event lands. +// +// Required in .env: +// LIT_USAGE_API_KEY (scoped key from setup — sent to lit-triggers) +// BRIDGE_TOKEN_BASE_SEPOLIA, BRIDGE_TOKEN_ARB_SEPOLIA +// TRIGGERS_BASE (e.g. https://triggers.litprotocol.com or http://localhost:8000) +// TRIGGERS_AGENT_TOKEN (Bearer token from the lit-triggers agent-auth flow) +// +// Prereqs for the lit-triggers instance: +// * BASE_SEPOLIA_RPC_URL and ARBITRUM_SEPOLIA_RPC_URL set in its env (the +// poller resolves RPCs per chain from these — see config.rs CHAIN_SPECS, +// which now include base-sepolia / arbitrum-sepolia). + +const fs = require("fs"); +const path = require("path"); +const env = require("./_env"); + +const BUILT_ACTION = path.join(__dirname, "..", "action", "bridgeAction.built.js"); +const BURN_EVENT = "BurnInitiated(address,address,uint256,uint256,uint256,uint256)"; + +async function createTrigger(base, token, body) { + const res = await fetch(`${base}/api/triggers`, { + method: "POST", + headers: { Authorization: `Bearer ${token}`, "Content-Type": "application/json" }, + body: JSON.stringify(body), + }); + const out = await res.json(); + if (!res.ok) throw new Error(`POST /api/triggers -> ${res.status}: ${JSON.stringify(out)}`); + return out; +} + +async function main() { + env.load(); + for (const k of ["LIT_USAGE_API_KEY", "BRIDGE_TOKEN_BASE_MAINNET", "BRIDGE_TOKEN_ARB_MAINNET", "TRIGGERS_BASE", "TRIGGERS_AGENT_TOKEN"]) { + if (!process.env[k]) { + throw new Error( + `${k} missing. Set TRIGGERS_BASE + TRIGGERS_AGENT_TOKEN after authorizing this ` + + `machine with lit-triggers (magic-link sign-in + "Authorize agent"). The rest come from setup.` + ); + } + } + const actionCode = fs.readFileSync(BUILT_ACTION, "utf8"); + const base = process.env.TRIGGERS_BASE.replace(/\/$/, ""); + const token = process.env.TRIGGERS_AGENT_TOKEN; + + // default_params carry the relay config; the dispatcher overlays the event. + // The action resolves the destination from the source token's bridgePartner + // and caps gas itself, so we no longer pass a tokens map or gasLimit (the + // action would ignore them). >= 2 distinct registry hosts (action requires). + const defaultParams = { + registryRpcUrls: ["https://base-rpc.publicnode.com", "https://1rpc.io/base", "https://gateway.tenderly.co/public/base"], + }; + + const directions = [ + { name: "lit-bridge: Base burns", chain: "base", contract: process.env.BRIDGE_TOKEN_BASE_MAINNET }, + { name: "lit-bridge: Arbitrum burns", chain: "arbitrum", contract: process.env.BRIDGE_TOKEN_ARB_MAINNET }, + ]; + + for (const d of directions) { + const trigger = await createTrigger(base, token, { + name: d.name, + kind: "chain_event", + action_code: actionCode, + default_params: defaultParams, + usage_api_key: process.env.LIT_USAGE_API_KEY, + config: { + chain: d.chain, + contract_address: d.contract, + event_signature: BURN_EVENT, + }, + }); + console.log(` ${d.name}: trigger ${trigger.id} (cid ${trigger.action_cid})`); + } + + console.log("\n✓ Relayer triggers registered. Burns on either chain now auto-mint on the other."); +} + +main().catch((err) => { + console.error("\nregisterTriggers failed:", err.message); + process.exit(1); +}); diff --git a/lit-bridge/scripts/relay.js b/lit-bridge/scripts/relay.js new file mode 100644 index 00000000..183b616d --- /dev/null +++ b/lit-bridge/scripts/relay.js @@ -0,0 +1,107 @@ +// Relayer test: prove the action AUTO-BROADCASTS in relay mode, without a +// running lit-triggers instance. We burn on the source chain, then invoke the +// bridge action with a synthetic chain_event `event` shaped exactly like what +// lit-triggers' dispatcher would pass. The action re-verifies, signs, and sends +// the mint itself from the oracle account. lit-triggers (in production) just +// calls this same action on the BurnInitiated event — see registerTriggers.js. +// +// Usage: node relay.js [--from baseSepolia] [--to arbitrumSepolia] [--amount 10] + +const fs = require("fs"); +const path = require("path"); +const { ethers } = require("ethers"); +const env = require("./_env"); +const lit = require("./lit"); + +const BUILT_ACTION = path.join(__dirname, "..", "action", "bridgeAction.built.js"); + +function loadAbi(name) { + const p = path.join(__dirname, "..", "contracts", "out", `${name}.sol`, `${name}.json`); + return JSON.parse(fs.readFileSync(p, "utf8")).abi; +} +function arg(flag, def) { + const i = process.argv.indexOf(flag); + return i !== -1 ? process.argv[i + 1] : def; +} + +const CHAINS = { + base: { id: 8453, name: "Base", tokenEnv: "BRIDGE_TOKEN_BASE_MAINNET", alchemySub: "base-mainnet" }, + arbitrum: { id: 42161, name: "Arbitrum", tokenEnv: "BRIDGE_TOKEN_ARB_MAINNET", alchemySub: "arb-mainnet" }, +}; +const REGISTRY_READ_RPCS = ["https://base-rpc.publicnode.com", "https://1rpc.io/base", "https://gateway.tenderly.co/public/base"]; + +async function main() { + env.load(); + const { LIT_API_BASE = "https://api.chipotle.litprotocol.com", LIT_USAGE_API_KEY } = process.env; + if (!LIT_USAGE_API_KEY || !fs.existsSync(BUILT_ACTION)) throw new Error("run setup first"); + const actionCode = fs.readFileSync(BUILT_ACTION, "utf8"); + + const src = CHAINS[arg("--from", "base")]; + const dst = CHAINS[arg("--to", "arbitrum")]; + const minConf = Math.max(Number(process.env.MIN_CONFIRMATIONS || 5), 2); + const amount = ethers.utils.parseUnits(arg("--amount", "10"), 18); + + const A = process.env.ALCHEMY_API_KEY; + const srcProvider = new ethers.providers.JsonRpcProvider(`https://${src.alchemySub}.g.alchemy.com/v2/${A}`); + const dstProvider = new ethers.providers.JsonRpcProvider(`https://${dst.alchemySub}.g.alchemy.com/v2/${A}`); + const srcSigner = new ethers.Wallet(process.env.DEPLOYER_PRIVATE_KEY, srcProvider); + const recipient = arg("--recipient", await srcSigner.getAddress()); + + const tokenAbi = loadAbi("BridgeToken"); + const srcToken = new ethers.Contract(process.env[src.tokenEnv], tokenAbi, srcSigner); + const dstToken = new ethers.Contract(process.env[dst.tokenEnv], tokenAbi, dstProvider); + + // 1. Burn ---------------------------------------------------------------- + const prepay = (await dstProvider.getGasPrice()).mul(300000).mul(2); // covers action's MINT_GAS_LIMIT (300k) + buffer + console.log(`Burning ${arg("--amount", "10")} on ${src.name} -> ${dst.name}; gas prepay ${ethers.utils.formatEther(prepay)} ETH...`); + const burnRcpt = await (await srcToken.burn(amount, dst.id, recipient, { value: prepay })).wait(); + const burnTopic = ethers.utils.id("BurnInitiated(address,address,uint256,uint256,uint256,uint256)"); + const log = burnRcpt.logs.find( + (l) => l.address.toLowerCase() === srcToken.address.toLowerCase() && + (l.topics[0] || "").toLowerCase() === burnTopic.toLowerCase() + ); + console.log(` burn tx ${burnRcpt.transactionHash} log ${log.logIndex} (block ${burnRcpt.blockNumber})`); + + // 2. Wait for finality --------------------------------------------------- + console.log(` waiting for ${minConf} confirmations...`); + while ((await srcProvider.getBlockNumber()) - burnRcpt.blockNumber < minConf) { + await new Promise((r) => setTimeout(r, 2000)); + } + + // 3. Synthetic chain_event — exactly what lit-triggers' dispatcher passes -- + const event = { + source: "chain_event", + chain_id: src.id, + contract_address: srcToken.address, + transaction_hash: burnRcpt.transactionHash, + log_index: log.logIndex, + }; + const before = await dstToken.balanceOf(recipient); + + console.log(" invoking bridge action in RELAY mode (it verifies, signs, AND broadcasts)..."); + const resp = await lit.runAction(LIT_API_BASE, LIT_USAGE_API_KEY, actionCode, { + source: "chain_event", + event, + registryRpcUrls: REGISTRY_READ_RPCS, // destination resolved from bridgePartner; gas capped by the action + }); + if (!resp || !resp.minted) throw new Error(`relay did not mint: ${JSON.stringify(resp)}`); + + // The public dest RPC can lag the node the action minted through — wait for + // the mint receipt to land here before reading the balance, else it's stale. + for (let i = 0; i < 15; i++) { + const r = await dstProvider.getTransactionReceipt(resp.mintTxHash); + if (r && r.blockNumber) break; + await new Promise((r) => setTimeout(r, 2000)); + } + const after = await dstToken.balanceOf(recipient); + console.log(`\n✓ Relay complete — the ACTION broadcast the mint itself.`); + console.log(` oracle: ${resp.signer}`); + console.log(` mint tx (on ${dst.name}): ${resp.mintTxHash}`); + console.log(` ${dst.name} balance: ${ethers.utils.formatUnits(before, 18)} -> ${ethers.utils.formatUnits(after, 18)}`); +} + +main().catch((err) => { + console.error("\nRelay failed:", err.message); + if (err.body) console.error("Server said:", JSON.stringify(err.body)); + process.exit(1); +}); diff --git a/lit-bridge/scripts/retryPoller.js b/lit-bridge/scripts/retryPoller.js new file mode 100644 index 00000000..01b33d4c --- /dev/null +++ b/lit-bridge/scripts/retryPoller.js @@ -0,0 +1,113 @@ +// Retry poller — recovers stuck burns the single-fire lit-triggers relayer +// missed (e.g. a burn that wasn't final, or the RPCs flaked, when the trigger +// fired its one time). Scans recent BurnInitiated events on each chain, checks +// whether each has already been minted on the destination (usedBurnIds), and +// re-runs the bridge action (relay mode) for any that are un-minted. +// +// Idempotent and safe to over-run: the on-chain usedBurnIds guard means a +// double-relay just reverts harmlessly, already-minted burns are skipped, and a +// not-yet-relayable burn (still pre-finality / underfunded prepay) is simply +// retried next cycle. This is the #4 follow-up (true finality) — the relayer can +// now wait for finality because the poller keeps retrying until the mint lands. +// +// Usage: +// node retryPoller.js # loop (RETRY_INTERVAL_SECS, default 120) +// node retryPoller.js --once # single pass (for cron) +// Env: RETRY_WINDOW_BLOCKS (default 50000), RETRY_INTERVAL_SECS (default 120). + +const fs = require("fs"); +const path = require("path"); +const { ethers } = require("ethers"); +const env = require("./_env"); +const lit = require("./lit"); + +const LIT_API_BASE = "https://api.chipotle.litprotocol.com"; +const REGISTRY_READ_RPCS = ["https://base-rpc.publicnode.com", "https://1rpc.io/base", "https://gateway.tenderly.co/public/base"]; +const BUILT_ACTION = path.join(__dirname, "..", "action", "bridgeAction.built.js"); +const BURN_TOPIC = ethers.utils.id("BurnInitiated(address,address,uint256,uint256,uint256,uint256)"); + +function loadAbi(name) { + return JSON.parse(fs.readFileSync(path.join(__dirname, "..", "contracts", "out", `${name}.sol`, `${name}.json`), "utf8")).abi; +} + +// Chains this poller relays between. Mirrors the other scripts. +const CHAINS = { + base: { id: 8453, name: "Base", tokenEnv: "BRIDGE_TOKEN_BASE_MAINNET", alchemySub: "base-mainnet" }, + arbitrum: { id: 42161, name: "Arbitrum", tokenEnv: "BRIDGE_TOKEN_ARB_MAINNET", alchemySub: "arb-mainnet" }, +}; + +async function main() { + env.load(); + const once = process.argv.includes("--once"); + const A = process.env.ALCHEMY_API_KEY; + const usageKey = process.env.LIT_USAGE_API_KEY; + if (!usageKey || !fs.existsSync(BUILT_ACTION)) throw new Error("run setup first (need LIT_USAGE_API_KEY + built action)"); + const actionCode = fs.readFileSync(BUILT_ACTION, "utf8"); + const windowBlocks = Number(process.env.RETRY_WINDOW_BLOCKS || 50000); + const intervalSecs = Number(process.env.RETRY_INTERVAL_SECS || 120); + const tokenAbi = loadAbi("BridgeToken"); + + // Build providers + token handles keyed by chain id. + const byId = {}; + for (const k of Object.keys(CHAINS)) { + const c = CHAINS[k]; + const provider = new ethers.providers.JsonRpcProvider(`https://${c.alchemySub}.g.alchemy.com/v2/${A}`); + byId[c.id] = { ...c, provider, token: new ethers.Contract(process.env[c.tokenEnv], tokenAbi, provider) }; + } + + async function pass() { + for (const srcId of Object.keys(byId)) { + const src = byId[srcId]; + let head, logs; + try { + head = await src.provider.getBlockNumber(); + logs = await src.provider.getLogs({ + address: src.token.address, topics: [BURN_TOPIC], + fromBlock: Math.max(0, head - windowBlocks), toBlock: head, + }); + } catch (e) { + console.log(`[${src.name}] getLogs failed: ${e.message}`); + continue; + } + for (const log of logs) { + const destChainId = Number(ethers.BigNumber.from(log.topics[3])); + const dest = byId[destChainId]; + if (!dest) continue; // destination chain not managed by this poller + // burnId must match BridgeToken.mint: keccak256(abi.encode(srcChainId, burnTxHash, logIndex)) + const burnId = ethers.utils.keccak256( + ethers.utils.defaultAbiCoder.encode(["uint256", "bytes32", "uint256"], [src.id, log.transactionHash, log.logIndex]) + ); + let minted; + try { + minted = await dest.token.usedBurnIds(burnId); + } catch { + continue; // dest RPC hiccup; try next cycle + } + if (minted) continue; + + console.log(`[retry] un-minted ${src.name}->${dest.name} tx ${log.transactionHash} log ${log.logIndex} — relaying...`); + try { + const resp = await lit.runAction(LIT_API_BASE, usageKey, actionCode, { + source: "chain_event", + event: { + source: "chain_event", chain_id: src.id, transaction_hash: log.transactionHash, + contract_address: src.token.address, log_index: log.logIndex, + }, + registryRpcUrls: REGISTRY_READ_RPCS, + }); + if (resp && resp.minted) console.log(` ✓ minted on ${dest.name}: ${resp.mintTxHash}`); + else console.log(` not yet relayable: ${(resp && resp.reason) || JSON.stringify(resp)}`); + } catch (e) { + console.log(` relay error: ${e.message}`); + } + } + } + } + + do { + await pass(); + if (!once) await new Promise((r) => setTimeout(r, intervalSecs * 1000)); + } while (!once); +} + +main().catch((e) => { console.error("retryPoller failed:", e.message); process.exit(1); }); diff --git a/lit-bridge/scripts/setup.js b/lit-bridge/scripts/setup.js new file mode 100644 index 00000000..a10a926b --- /dev/null +++ b/lit-bridge/scripts/setup.js @@ -0,0 +1,253 @@ +// One-shot, resumable setup for lit-bridge on Base Sepolia + Arbitrum Sepolia. +// +// Required in lit-bridge/.env (see .env.example): +// LIT_API_KEY, DEPLOYER_PRIVATE_KEY, ALCHEMY_API_KEY, INFURA_API_KEY +// +// What it does (each step writes its result to .env and is skipped on re-run): +// 1. forge build (compile contracts) +// 2. Deploy BridgeConfigRegistry on Base Sepolia (owner = REGISTRY_OWNER || deployer) +// 3. Create the dedicated signing account (PKP) — Option B +// 4. Build the action with REGISTRY_ADDRESS + BRIDGE_PKP_ID injected; compute CIDs +// 5. Create group, add PKP, pin the 3 CIDs, mint a scoped usage key +// 6. Derive the oracle address (the key the action signs mints with) +// 7. Encrypt ALCHEMY_API_KEY + INFURA_API_KEY against the PKP (in-TEE) +// 8. Populate the registry: setChain(chain, minConf, quorum=2, [alchemy, infura]) for both chains +// 9. Deploy BridgeToken on both chains (oracle pinned); mint supply on the home chain +// 10. Wire bridgePartner both directions (write-once) + +const fs = require("fs"); +const path = require("path"); +const { execSync } = require("child_process"); +const { ethers } = require("ethers"); +const env = require("./_env"); +const lit = require("./lit"); +const { buildAction } = require("./buildAction"); + +const CONTRACTS_DIR = path.join(__dirname, "..", "contracts"); + +function loadArtifact(name) { + const p = path.join(CONTRACTS_DIR, "out", `${name}.sol`, `${name}.json`); + const j = JSON.parse(fs.readFileSync(p, "utf8")); + return { abi: j.abi, bytecode: j.bytecode.object }; +} + +async function main() { + env.load(); + const { LIT_API_BASE = "https://api.chipotle.litprotocol.com", LIT_API_KEY } = process.env; + for (const k of ["LIT_API_KEY", "DEPLOYER_PRIVATE_KEY", "ALCHEMY_API_KEY", "INFURA_API_KEY"]) { + if (!process.env[k]) throw new Error(`${k} is required in lit-bridge/.env`); + } + + const minConf = Number(process.env.MIN_CONFIRMATIONS || 5); + const quorum = Number(process.env.CHAIN_QUORUM || 2); + const homeNetwork = process.env.INITIAL_SUPPLY_NETWORK || "base"; + const initialSupply = ethers.utils.parseUnits(process.env.INITIAL_SUPPLY || "1000000", 18); + + // Broadcast via Alchemy (reliable for deploys); the action's verification reads + // go through the encrypted Alchemy/Infura keys with M-of-N consensus. + const A = process.env.ALCHEMY_API_KEY; + const baseProvider = new ethers.providers.JsonRpcProvider(`https://base-mainnet.g.alchemy.com/v2/${A}`); + const arbProvider = new ethers.providers.JsonRpcProvider(`https://arb-mainnet.g.alchemy.com/v2/${A}`); + const baseSigner = new ethers.Wallet(process.env.DEPLOYER_PRIVATE_KEY, baseProvider); + const arbSigner = new ethers.Wallet(process.env.DEPLOYER_PRIVATE_KEY, arbProvider); + + const CHAINS = [ + { id: 8453, name: "Base", network: "base", signer: baseSigner, tokenEnv: "BRIDGE_TOKEN_BASE_MAINNET" }, + { id: 42161, name: "Arbitrum", network: "arbitrum", signer: arbSigner, tokenEnv: "BRIDGE_TOKEN_ARB_MAINNET" }, + ]; + + // 1. Compile ------------------------------------------------------------- + console.log("Step 1/10: forge build..."); + execSync("forge build", { cwd: CONTRACTS_DIR, stdio: "inherit" }); + const registryArt = loadArtifact("BridgeConfigRegistry"); + const tokenArt = loadArtifact("BridgeToken"); + + // 2. Deploy registry on Base Sepolia ------------------------------------ + if (!process.env.REGISTRY_ADDRESS) { + console.log("Step 2/10: Deploying BridgeConfigRegistry on Base mainnet..."); + const owner = process.env.REGISTRY_OWNER || (await baseSigner.getAddress()); + const factory = new ethers.ContractFactory(registryArt.abi, registryArt.bytecode, baseSigner); + const c = await factory.deploy(owner); + await c.deployed(); + env.upsert("REGISTRY_ADDRESS", c.address); + console.log(` REGISTRY_ADDRESS=${c.address} owner=${owner}`); + } else { + console.log(`Step 2/10: registry exists (${process.env.REGISTRY_ADDRESS}) — skip`); + } + + // 3. Create the signing account (PKP) ----------------------------------- + if (!process.env.BRIDGE_PKP_ID) { + console.log("Step 3/10: Creating dedicated signing account (PKP)..."); + const pkp = await lit.createWallet(LIT_API_BASE, LIT_API_KEY); + env.upsert("BRIDGE_PKP_ID", pkp); + console.log(` BRIDGE_PKP_ID=${pkp}`); + } else { + console.log(`Step 3/10: signing account exists (${process.env.BRIDGE_PKP_ID}) — skip`); + } + + // 4. Build action + CIDs ------------------------------------------------- + console.log("Step 4/10: Building action (injecting registry + pkp) and computing CIDs..."); + const builtCode = buildAction(process.env.REGISTRY_ADDRESS, process.env.BRIDGE_PKP_ID); + const bridgeCid = await lit.getActionCid(LIT_API_BASE, LIT_API_KEY, builtCode); + const encryptCid = await lit.getActionCid(LIT_API_BASE, LIT_API_KEY, lit.ENCRYPT_SECRET_CODE); + const deriverCid = await lit.getActionCid(LIT_API_BASE, LIT_API_KEY, lit.SIGNER_DERIVER_CODE); + env.upsert("ACTION_IPFS_CID", bridgeCid); + console.log(` ACTION_IPFS_CID=${bridgeCid}`); + + // 5. Group + PKP + pin CIDs + usage key --------------------------------- + // Group/PKP/usage-key are created once. The CID pinning runs EVERY time so + // an action upgrade (new CID) is re-pinned — re-running setup after editing + // the action is the upgrade path. Pinning is idempotent; ignore "already". + const ignoreExists = async (p) => { + try { await p; } catch (e) { + if (!/exist|already|duplicate/i.test(e.message || "")) throw e; + } + }; + if (!process.env.GROUP_ID || !process.env.LIT_USAGE_API_KEY) { + console.log("Step 5/10: Creating group, adding PKP, minting usage key..."); + const groupId = await lit.addGroup( + LIT_API_BASE, LIT_API_KEY, "lit-bridge", + "Bridge signing account + pinned actions (oracle, encrypt, deriver)" + ); + env.upsert("GROUP_ID", String(groupId)); + await lit.addPkpToGroup(LIT_API_BASE, LIT_API_KEY, groupId, process.env.BRIDGE_PKP_ID); + const usageKey = await lit.createUsageApiKey( + LIT_API_BASE, LIT_API_KEY, groupId, "lit-bridge-executor", + "Scoped key the relayer / bridge.js uses to run the bridge action" + ); + env.upsert("LIT_USAGE_API_KEY", usageKey); + console.log(` GROUP_ID=${groupId} usage key=${usageKey.slice(0, 12)}...`); + } else { + console.log(`Step 5/10: group ${process.env.GROUP_ID} exists — re-pinning current CIDs`); + } + const groupId = Number(process.env.GROUP_ID); + await ignoreExists(lit.addAction(LIT_API_BASE, LIT_API_KEY, bridgeCid, "bridgeAction", + "lit-bridge oracle: M-of-N consensus over burns -> signs/relays mint")); + for (const cid of [bridgeCid, encryptCid, deriverCid]) { + await ignoreExists(lit.addActionToGroup(LIT_API_BASE, LIT_API_KEY, groupId, cid)); + } + console.log(` pinned CID ${bridgeCid} (+ encrypt, deriver) to group ${groupId}`); + const usageKey = process.env.LIT_USAGE_API_KEY; + + // 6. Derive oracle address ---------------------------------------------- + if (!process.env.ORACLE_ADDRESS) { + console.log("Step 6/10: Deriving oracle address (the key the action signs with)..."); + const r = await lit.runAction(LIT_API_BASE, usageKey, lit.SIGNER_DERIVER_CODE, { + pkpId: process.env.BRIDGE_PKP_ID, + }); + if (!r || !r.address) throw new Error(`oracle derivation failed: ${JSON.stringify(r)}`); + env.upsert("ORACLE_ADDRESS", r.address); + console.log(` ORACLE_ADDRESS=${r.address}`); + } else { + console.log(`Step 6/10: oracle ${process.env.ORACLE_ADDRESS} — skip`); + } + + // 7. Encrypt provider keys ---------------------------------------------- + if (!process.env.ENC_ALCHEMY || !process.env.ENC_INFURA) { + console.log("Step 7/10: Encrypting Alchemy + Infura keys against the PKP..."); + const encA = await lit.runAction(LIT_API_BASE, usageKey, lit.ENCRYPT_SECRET_CODE, { + pkpId: process.env.BRIDGE_PKP_ID, message: process.env.ALCHEMY_API_KEY, + }); + const encI = await lit.runAction(LIT_API_BASE, usageKey, lit.ENCRYPT_SECRET_CODE, { + pkpId: process.env.BRIDGE_PKP_ID, message: process.env.INFURA_API_KEY, + }); + if (!encA?.ciphertext || !encI?.ciphertext) { + throw new Error("key encryption failed"); + } + env.upsert("ENC_ALCHEMY", encA.ciphertext); + env.upsert("ENC_INFURA", encI.ciphertext); + console.log(` encrypted (alchemy ${encA.ciphertext.length} chars, infura ${encI.ciphertext.length} chars)`); + } else { + console.log("Step 7/10: provider keys already encrypted — skip"); + } + + // 8. Populate registry --------------------------------------------------- + if (!process.env.REGISTRY_POPULATED) { + console.log(`Step 8/10: Writing chain config (quorum ${quorum}, minConf ${minConf}) for both chains...`); + const registry = new ethers.Contract(process.env.REGISTRY_ADDRESS, registryArt.abi, baseSigner); + // RpcType: 0=Alchemy, 1=Infura. Hostnames are built in the action from + // code-resident maps; only the encrypted key is stored. + const rpcs = [ + [0, "", process.env.ENC_ALCHEMY], + [1, "", process.env.ENC_INFURA], + ]; + for (const c of CHAINS) { + const tx = await registry.setChain(c.id, minConf, quorum, rpcs); + await tx.wait(); + console.log(` setChain(${c.id}) -> ${tx.hash}`); + } + env.upsert("REGISTRY_POPULATED", "1"); + } else { + console.log("Step 8/10: registry already populated — skip"); + } + + // 9. Deploy tokens ------------------------------------------------------- + for (const c of CHAINS) { + if (process.env[c.tokenEnv]) { + console.log(`Step 9/10: ${c.name} token exists (${process.env[c.tokenEnv]}) — skip`); + continue; + } + console.log(`Step 9/10: Deploying BridgeToken on ${c.name}...`); + const supply = c.network === homeNetwork ? initialSupply : ethers.constants.Zero; + const factory = new ethers.ContractFactory(tokenArt.abi, tokenArt.bytecode, c.signer); + const t = await factory.deploy( + process.env.TOKEN_NAME || "Bridge Coin", + process.env.TOKEN_SYMBOL || "BRDG", + supply, + process.env.ORACLE_ADDRESS + ); + await t.deployed(); + env.upsert(c.tokenEnv, t.address); + console.log(` ${c.tokenEnv}=${t.address} supply=${supply.toString()}`); + } + + // 10. Wire partners (write-once) ---------------------------------------- + console.log("Step 10/10: Wiring bridge partners (write-once)..."); + for (const me of CHAINS) { + const peer = CHAINS.find((c) => c !== me); + const token = new ethers.Contract( + process.env[me.tokenEnv], tokenArt.abi, me.signer + ); + const existing = await token.bridgePartner(peer.id); + if (existing && existing !== ethers.constants.AddressZero) { + console.log(` ${me.name}: partner for ${peer.id} already set (${existing}) — skip`); + continue; + } + const tx = await token.setBridgePartner(peer.id, process.env[peer.tokenEnv]); + await tx.wait(); + console.log(` ${me.name}: setBridgePartner(${peer.id}, ${process.env[peer.tokenEnv]}) -> ${tx.hash}`); + } + + // 11. Fee config (skim -> treasury) ------------------------------------- + // Idempotent: only sends a tx when the on-chain config differs from .env. + const feeTreasury = process.env.FEE_TREASURY || (await baseSigner.getAddress()); + const feeFlat = ethers.utils.parseUnits(process.env.FEE_FLAT || "0", 18); + const feeBps = Number(process.env.FEE_BPS || 10); // default 0.1% + console.log(`Step 11/11: Setting fee config (treasury=${feeTreasury}, flat=${process.env.FEE_FLAT || "0"}, bps=${feeBps})...`); + for (const c of CHAINS) { + const token = new ethers.Contract(process.env[c.tokenEnv], tokenArt.abi, c.signer); + const [curT, curBps, curFlat] = await Promise.all([token.feeTreasury(), token.feeBps(), token.feeFlat()]); + if (curT.toLowerCase() === feeTreasury.toLowerCase() && Number(curBps) === feeBps && curFlat.eq(feeFlat)) { + console.log(` ${c.name}: fee config already current — skip`); + continue; + } + const tx = await token.setFeeConfig(feeTreasury, feeFlat, feeBps); + await tx.wait(); + console.log(` ${c.name}: setFeeConfig -> ${tx.hash}`); + } + + console.log("\n✓ Setup complete."); + console.log(" Registry: ", process.env.REGISTRY_ADDRESS, "(Base mainnet)"); + console.log(" Oracle (signer):", process.env.ORACLE_ADDRESS); + console.log(" Signing PKP: ", process.env.BRIDGE_PKP_ID); + console.log(" Action CID: ", process.env.ACTION_IPFS_CID); + console.log(" Token (Base): ", process.env.BRIDGE_TOKEN_BASE_MAINNET); + console.log(" Token (Arb): ", process.env.BRIDGE_TOKEN_ARB_MAINNET); + console.log("\nNext: fund the PKP (fundPkp.js), then registerTriggers.js, then burn.js"); +} + +main().catch((err) => { + console.error("\nSetup failed:", err.message); + if (err.body) console.error("Server said:", JSON.stringify(err.body)); + process.exit(1); +}); diff --git a/lit-bridge/scripts/watchRuns.js b/lit-bridge/scripts/watchRuns.js new file mode 100644 index 00000000..e74dd82f --- /dev/null +++ b/lit-bridge/scripts/watchRuns.js @@ -0,0 +1,46 @@ +// Watch a lit-triggers trigger's runs + the destination balance until the +// auto-relayed mint lands. Usage: node watchRuns.js + +const fs = require("fs"); +const os = require("os"); +const path = require("path"); +const { ethers } = require("ethers"); +const env = require("./_env"); + +const BASE = "https://triggers.litprotocol.com"; + +async function main() { + env.load(); + const triggerId = process.argv[2]; + if (!triggerId) throw new Error("usage: node watchRuns.js "); + const token = fs.readFileSync(path.join(os.homedir(), ".lit-triggers", "agent-token"), "utf8").trim(); + + const A = process.env.ALCHEMY_API_KEY; + const p = new ethers.providers.JsonRpcProvider(`https://arb-mainnet.g.alchemy.com/v2/${A}`); + const t = new ethers.Contract(process.env.BRIDGE_TOKEN_ARB_MAINNET, ["function balanceOf(address) view returns (uint256)"], p); + const dep = new ethers.Wallet(process.env.DEPLOYER_PRIVATE_KEY).address; + + for (let i = 0; i < 30; i++) { + let runs = []; + try { + const r = await fetch(`${BASE}/api/triggers/${triggerId}/runs?limit=3`, { headers: { authorization: `Bearer ${token}` } }); + const j = await r.json(); + runs = Array.isArray(j) ? j : (j.runs || []); // API returns { runs: [...] } + } catch (e) { /* transient */ } + const latest = runs[0]; + const bal = await t.balanceOf(dep); + console.log(`[t+${i * 10}s] latest run: ${latest ? latest.status : "none"} | Arb BRDG balance: ${ethers.utils.formatUnits(bal, 18)}`); + if (bal.gt(0)) { + console.log("\n✓ AUTO-RELAY CONFIRMED — the live lit-triggers poller ran the action, which minted on Arbitrum."); + if (latest && latest.response) console.log("run response:", JSON.stringify(latest.response).slice(0, 400)); + return; + } + if (latest && latest.status === "failed") { + console.log("run FAILED:", JSON.stringify(latest.error || latest.response || latest).slice(0, 600)); + } + await new Promise((r) => setTimeout(r, 10000)); + } + console.log("\n(timed out — check the trigger runs / lit-triggers BASE_RPC_URL config)"); +} + +main().catch((e) => { console.error("watch failed:", e.message); process.exit(1); }); diff --git a/lit-bridge/src/config.rs b/lit-bridge/src/config.rs new file mode 100644 index 00000000..8f42f044 --- /dev/null +++ b/lit-bridge/src/config.rs @@ -0,0 +1,91 @@ +//! Environment configuration. Read once at startup; missing required vars fail +//! the process with a clear message — no silent defaults. +//! +//! The service is stateless: bridge state lives entirely on-chain (burns are +//! `BurnInitiated` events; completions are `usedBurnIds` / `BridgeMint` on the +//! destination), so there's nothing to persist. This config is just what the +//! bridging UI needs to bootstrap (where the registry lives + the chains/token +//! it can bridge). It's served verbatim at `GET /api/config`. + +use anyhow::{Context, Result}; + +/// A bridgeable chain + the token's address on it, surfaced to the UI. The UI +/// reads/writes chain via `rpc` (a public endpoint) and the user's wallet. +#[derive(Clone, Debug, serde::Serialize, serde::Deserialize)] +pub struct ChainInfo { + pub chain_id: i64, + pub name: String, + pub rpc: String, + pub token: String, + #[serde(default)] + pub explorer: String, +} + +#[derive(Clone, Debug, serde::Serialize)] +pub struct Config { + /// Public base URL, e.g. "https://bridge.litprotocol.com". + pub public_base_url: String, + /// Chain id where the BridgeConfigRegistry lives (Base). Demo: 84532. + pub registry_chain_id: i64, + /// Deployed BridgeConfigRegistry address (0x...). None until deployed. + pub registry_address: Option, + /// Token ticker shown in the UI (e.g. "BRDG"). + pub token_symbol: Option, + /// Fee in basis points (matches the on-chain BridgeToken fee), shown in the UI. + pub fee_bps: i64, + /// Flat fee in WHOLE tokens (matches the `FEE_FLAT` env that setup passes + /// through `parseUnits`), deducted on mint before the bps fee + /// (`feeFlat + amount*feeBps/1e4`). Surfaced so the UI quote isn't wrong when + /// the issuer set a nonzero flat fee. A decimal string the UI subtracts from + /// the human amount directly. + pub fee_flat: String, + /// Bridgeable chains + token addresses (from CHAINS_JSON). Empty disables the UI's bridge form. + pub chains: Vec, +} + +impl Config { + pub fn from_env() -> Result { + Ok(Self { + public_base_url: optional("PUBLIC_BASE_URL", "http://localhost:8000") + .trim_end_matches('/') + .to_string(), + registry_chain_id: optional_i64("REGISTRY_CHAIN_ID", 84532)?, + registry_address: optional_trimmed("REGISTRY_ADDRESS"), + token_symbol: optional_trimmed("TOKEN_SYMBOL"), + fee_bps: optional_i64("FEE_BPS", 10)?, + fee_flat: optional_trimmed("FEE_FLAT").unwrap_or_else(|| "0".to_string()), + chains: parse_chains()?, + }) + } +} + +/// Parse `CHAINS_JSON` (a JSON array of ChainInfo) for the UI. Empty/unset → no +/// chains (the UI shows a "not configured" state rather than crashing). +fn parse_chains() -> Result> { + match optional_trimmed("CHAINS_JSON") { + None => Ok(Vec::new()), + Some(s) => serde_json::from_str(&s) + .context("CHAINS_JSON must be a JSON array of {chain_id,name,rpc,token,explorer}"), + } +} + +fn optional(name: &str, default: &str) -> String { + optional_trimmed(name).unwrap_or_else(|| default.to_string()) +} + +fn optional_trimmed(name: &str) -> Option { + std::env::var(name) + .ok() + .map(|v| v.trim().to_string()) + .filter(|v| !v.is_empty()) +} + +fn optional_i64(name: &str, default: i64) -> Result { + match std::env::var(name) { + Ok(v) if !v.trim().is_empty() => v + .trim() + .parse::() + .with_context(|| format!("env var {name} must be an integer; got {v:?}")), + _ => Ok(default), + } +} diff --git a/lit-bridge/src/lib.rs b/lit-bridge/src/lib.rs new file mode 100644 index 00000000..f48d302d --- /dev/null +++ b/lit-bridge/src/lib.rs @@ -0,0 +1,10 @@ +//! lit-bridge — permissionless cross-chain token bridge service. +//! +//! See `plans/hyperlane-competitor.md` for the full design. This crate is the +//! hosted product surface: it serves the bridging web UI and a small config +//! endpoint the UI bootstraps from. It is **stateless** — all bridge state +//! lives on-chain (the registry, the burn/mint events, `usedBurnIds`), so there +//! is no database. The trust-layer logic lives in `action/bridgeAction.js`; the +//! on-chain control plane lives in `contracts/`. + +pub mod config; diff --git a/lit-bridge/src/main.rs b/lit-bridge/src/main.rs new file mode 100644 index 00000000..21517f16 --- /dev/null +++ b/lit-bridge/src/main.rs @@ -0,0 +1,67 @@ +use lit_bridge::config; +use rocket::fs::{FileServer, NamedFile}; +use rocket::http::Status; +use rocket::serde::json::Json; +use rocket::{get, routes, State}; +use std::path::PathBuf; + +#[rocket::launch] +async fn rocket() -> _ { + init_tracing(); + apply_platform_env(); + let cfg = config::Config::from_env().expect("config"); + + rocket::build() + .manage(cfg) + .mount("/", routes![index, health, api_config]) + .mount("/static", FileServer::from("static")) +} + +/// Translate the platform-provided `PORT` into Rocket's `ROCKET_PORT`, and bind +/// `0.0.0.0` so the container's listener is reachable through ingress. +fn apply_platform_env() { + if std::env::var("ROCKET_PORT").is_err() { + if let Ok(port) = std::env::var("PORT") { + // SAFETY: invoked at startup before any threads are spawned. + unsafe { std::env::set_var("ROCKET_PORT", port) }; + } + } + if std::env::var("ROCKET_ADDRESS").is_err() { + // SAFETY: invoked at startup before any threads are spawned. + unsafe { std::env::set_var("ROCKET_ADDRESS", "0.0.0.0") }; + } +} + +fn init_tracing() { + use tracing_subscriber::EnvFilter; + tracing_subscriber::fmt() + .with_env_filter(EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("info"))) + .init(); +} + +/// `GET /health` — always 200 OK once Rocket is up (Railway healthcheck). +#[get("/health")] +fn health() -> &'static str { + "ok" +} + +/// `GET /api/config` — public bootstrap config for the UI (where the registry +/// lives). No secrets. +#[get("/api/config")] +fn api_config(cfg: &State) -> Json { + Json(cfg.inner().clone()) +} + +/// `GET /` — the bridging UI. Public (no auth gate). +#[get("/")] +async fn index() -> Result { + NamedFile::open(static_path("index.html")) + .await + .map_err(|_| Status::NotFound) +} + +fn static_path(name: &str) -> PathBuf { + let mut p = PathBuf::from("static"); + p.push(name); + p +} diff --git a/lit-bridge/static/bridge.js b/lit-bridge/static/bridge.js new file mode 100644 index 00000000..d34a4748 --- /dev/null +++ b/lit-bridge/static/bridge.js @@ -0,0 +1,232 @@ +// lit-bridge UI — wallet-direct, no backend beyond /api/config. +// Burn on the source chain (attaching the relayer's native gas prepay); the +// relayer auto-mints on the destination. We poll usedBurnIds on-chain to show +// completion. Mirrors scripts/burn.js + watchRuns.js, client-side. +// +// Trust note: config values (chain names, explorer URLs) and external strings +// (RPC/wallet error messages) are rendered as TEXT, never HTML — no innerHTML on +// any value we don't fully control. See setStatus/setText below. + +const MINT_GAS_LIMIT = 300000; // must match the action's MINT_GAS_LIMIT +const PREPAY_BUFFER = 2; // attach 2x the action's 1x requirement to absorb gas drift +const PREPAY_WARN_ETH = 0.02; // soft sanity ceiling: warn if a quote exceeds this +const TOKEN_ABI = [ + "function burn(uint256 amount, uint256 destChainId, address recipient) payable returns (uint256)", + "function balanceOf(address) view returns (uint256)", + "function decimals() view returns (uint8)", + "function usedBurnIds(bytes32) view returns (bool)", + "event BurnInitiated(address indexed from, address indexed recipient, uint256 amount, uint256 indexed destChainId, uint256 nonce, uint256 gasPrepaid)", +]; +const BURN_TOPIC = ethers.utils.id("BurnInitiated(address,address,uint256,uint256,uint256,uint256)"); + +let cfg, account; +let recipientAutoFilled = false; // true while #recipient mirrors the connected account +let balanceSeq = 0; // guards against stale async balance writes +const $ = (id) => document.getElementById(id); +const sleep = (ms) => new Promise((r) => setTimeout(r, ms)); +const chainById = (id) => cfg.chains.find((c) => c.chain_id === Number(id)); +const rpc = (c) => new ethers.providers.JsonRpcProvider(c.rpc); +const sym = () => cfg.token_symbol || ""; + +// Only http(s) explorer URLs become links — never javascript:/data: etc. Anything +// else falls back to plain text. Returns an or text node (never raw HTML). +function explorerTxNode(c, hash) { + let url = null; + try { + const u = new URL(`${c.explorer.replace(/\/$/, "")}/tx/${hash}`); + if (u.protocol === "http:" || u.protocol === "https:") url = u.href; + } catch { /* no/invalid explorer → text only */ } + if (!url) return document.createTextNode(hash.slice(0, 10) + "…"); + const a = document.createElement("a"); + a.href = url; a.target = "_blank"; a.rel = "noreferrer"; + a.textContent = hash.slice(0, 10) + "…"; + return a; +} + +// Status renderer: accepts plain text or an array of (string | Node) parts. Never +// interprets HTML, so RPC/wallet/config strings can't inject markup. +function setStatus(parts, cls = "") { + const el = $("status"); + el.replaceChildren(); + const span = document.createElement("span"); + if (cls) span.className = cls; + for (const p of Array.isArray(parts) ? parts : [parts]) { + span.appendChild(typeof p === "string" ? document.createTextNode(p) : p); + } + el.appendChild(span); +} + +async function init() { + cfg = await (await fetch("/api/config")).json(); + if (!cfg.chains || cfg.chains.length < 2) { + $("notconfigured").classList.remove("hidden"); + return; + } + $("bridge").classList.remove("hidden"); + for (const sel of [$("from"), $("to")]) { + sel.replaceChildren(); + for (const c of cfg.chains) { + const o = document.createElement("option"); + o.value = String(c.chain_id); + o.textContent = c.name; // textContent, not innerHTML — name is config-controlled + sel.appendChild(o); + } + } + $("to").selectedIndex = 1; + $("feenote").textContent = `Fee: ${feeLabel()} · token: ${cfg.token_symbol || "tokens"}`; + + $("connect").onclick = connect; + $("go").onclick = bridge; + $("swap").onclick = () => { const f = $("from").value; $("from").value = $("to").value; $("to").value = f; onChange(); }; + $("from").onchange = onChange; + $("to").onchange = onChange; + $("amount").oninput = onChange; + $("recipient").oninput = () => { recipientAutoFilled = false; }; + if (window.ethereum) { + window.ethereum.on?.("accountsChanged", (a) => { account = a[0]; afterConnect(); }); + window.ethereum.on?.("chainChanged", () => onChange()); + } +} + +function feeLabel() { + const flat = parseFloat(cfg.fee_flat || "0") || 0; + const bps = `${(cfg.fee_bps / 100).toFixed(2)}%`; + return flat > 0 ? `${flat} ${sym()} + ${bps}` : bps; +} + +async function connect() { + if (!window.ethereum) { setStatus("No EVM wallet found (install MetaMask).", "err"); return; } + try { + [account] = await window.ethereum.request({ method: "eth_requestAccounts" }); + afterConnect(); + } catch (e) { setStatus(errText(e), "err"); } +} + +function afterConnect() { + $("connect").textContent = account ? `${account.slice(0, 6)}…${account.slice(-4)}` : "Connect wallet"; + // Keep the recipient in sync with the connected account WHILE it's auto-filled, + // so switching accounts doesn't silently mint to the previous one. Once the user + // edits the field, we stop touching it. + if (account && (recipientAutoFilled || !$("recipient").value)) { + $("recipient").value = account; + recipientAutoFilled = true; + } + onChange(); +} + +async function onChange() { + const from = chainById($("from").value); + $("go").disabled = !account; + $("go").textContent = account ? "Bridge" : "Connect a wallet to bridge"; + if (!account || !from) { $("balance").textContent = ""; } + // balance on the source chain (sequence-guarded so a slow stale read can't + // overwrite a newer one after the user changes chain/account) + if (account && from) { + const seq = ++balanceSeq; + try { + const token = new ethers.Contract(from.token, TOKEN_ABI, rpc(from)); + const [bal, dec] = await Promise.all([token.balanceOf(account), token.decimals()]); + if (seq === balanceSeq) $("balance").textContent = `balance: ${(+ethers.utils.formatUnits(bal, dec)).toLocaleString()} ${sym()}`; + } catch { if (seq === balanceSeq) $("balance").textContent = ""; } + } + // fee quote (flat + bps, mirroring the contract) + const amt = parseFloat($("amount").value); + if (amt > 0) { + const flat = parseFloat(cfg.fee_flat || "0") || 0; + const fee = flat + amt * (cfg.fee_bps / 10000); + const net = amt - fee; + $("quote").textContent = net > 0 + ? `recipient receives ~${net.toLocaleString()} ${sym()} (after ${feeLabel()} fee), plus a native gas prepay you attach.` + : `⚠ the ${feeLabel()} fee meets or exceeds this amount — the recipient would get ~0. Bridge more.`; + } else $("quote").textContent = ""; +} + +async function ensureChain(chainId) { + const hex = "0x" + Number(chainId).toString(16); + try { + await window.ethereum.request({ method: "wallet_switchEthereumChain", params: [{ chainId: hex }] }); + } catch (e) { + if (e.code === 4902) { + const c = chainById(chainId); + await window.ethereum.request({ + method: "wallet_addEthereumChain", + params: [{ chainId: hex, chainName: c.name, rpcUrls: [c.rpc], nativeCurrency: { name: "ETH", symbol: "ETH", decimals: 18 }, blockExplorerUrls: c.explorer ? [c.explorer] : [] }], + }); + } else throw e; + } +} + +// Normalize wallet/RPC errors to a string (they're rendered as text, not HTML). +function errText(e) { + return String(e?.data?.message || e?.reason || e?.message || e || "unknown error"); +} + +async function bridge() { + const from = chainById($("from").value), to = chainById($("to").value); + if (from.chain_id === to.chain_id) { setStatus("Pick two different chains.", "err"); return; } + const recipient = ($("recipient").value || account || "").trim(); + if (!ethers.utils.isAddress(recipient)) { setStatus("Invalid recipient address.", "err"); return; } + const amtStr = $("amount").value.trim(); + if (!(parseFloat(amtStr) > 0)) { setStatus("Enter an amount.", "err"); return; } + + $("go").disabled = true; + try { + setStatus(`Switching wallet to ${from.name}…`); + await ensureChain(from.chain_id); + const web3 = new ethers.providers.Web3Provider(window.ethereum); + // Verify the wallet actually landed on the source chain before sending — a + // switch race or a wallet quirk could otherwise send against the wrong chain. + const net = await web3.getNetwork(); + if (net.chainId !== from.chain_id) { + setStatus(`Your wallet is on chain ${net.chainId}, not ${from.name} (${from.chain_id}). Switch and retry.`, "err"); + return; + } + const token = new ethers.Contract(from.token, TOKEN_ABI, web3.getSigner()); + const dec = await token.decimals(); + const amount = ethers.utils.parseUnits(amtStr, dec); + + // Relayer gas prepay = dest gas price × MINT_GAS_LIMIT × buffer (same native). + // The action requires ≥ gasPrice × MINT_GAS_LIMIT at relay time; the 2x buffer + // absorbs drift. A stale/hostile dest RPC could report an absurd price, so warn + // before the user signs an oversized value (it pools in the token, not refunded). + const gasPrice = await rpc(to).getGasPrice(); + const prepay = gasPrice.mul(MINT_GAS_LIMIT).mul(PREPAY_BUFFER); + const prepayEth = +ethers.utils.formatEther(prepay); + if (prepayEth > PREPAY_WARN_ETH) { + const ok = window.confirm(`The destination RPC quotes a gas prepay of ${prepayEth.toFixed(6)} ETH, which is unusually high. It is attached as msg.value and is NOT refunded if unused. Continue?`); + if (!ok) { setStatus("Cancelled — gas prepay looked too high.", "err"); return; } + } + + setStatus(`Burning ${amtStr} on ${from.name} (gas prepay ${prepayEth.toFixed(6)} ETH)… confirm in your wallet.`); + const tx = await token.burn(amount, to.chain_id, recipient, { value: prepay }); + setStatus(["Burn sent ", explorerTxNode(from, tx.hash), " — waiting for confirmation…"]); + const rcpt = await tx.wait(); + + const log = rcpt.logs.find((l) => l.address.toLowerCase() === from.token.toLowerCase() && (l.topics[0] || "").toLowerCase() === BURN_TOPIC.toLowerCase()); + if (!log) throw new Error("BurnInitiated event not found"); + const burnId = ethers.utils.keccak256(ethers.utils.defaultAbiCoder.encode(["uint256", "bytes32", "uint256"], [from.chain_id, tx.hash, log.logIndex])); + + setStatus(`Burned on ${from.name} ✓ — relaying to ${to.name} automatically (usually under a minute)…`); + const destToken = new ethers.Contract(to.token, TOKEN_ABI, rpc(to)); + for (let i = 0; i < 120; i++) { + try { if (await destToken.usedBurnIds(burnId)) { setStatus(`✓ Done — minted on ${to.name} for ${recipient.slice(0, 6)}…${recipient.slice(-4)}.`, "ok"); return; } } catch {} + await sleep(5000); + } + // Still not minted after ~10 min. The burn is final; recovery is the retry + // poller (if the prepay covers current gas) or self-submitting mint with the + // oracle signature. Don't over-promise automatic completion. + setStatus( + `Burn confirmed on ${from.name}, but the mint hasn't landed within ~10 min. ` + + `The retry poller will complete it once the attached prepay covers destination gas; ` + + `if gas spiked past the prepay, the recipient can self-submit the mint and pay their own gas. ` + + `Save this burnId: ${burnId}`, + "err", + ); + } catch (e) { + setStatus(errText(e), "err"); + } finally { + $("go").disabled = false; + } +} + +init(); diff --git a/lit-bridge/static/index.html b/lit-bridge/static/index.html new file mode 100644 index 00000000..55ec7ad2 --- /dev/null +++ b/lit-bridge/static/index.html @@ -0,0 +1,47 @@ + + + + + + lit-bridge + + + + +
+
+

lit-bridge

+ +
+

Permissionless cross-chain token bridge — verified by a Lit Action, not a validator set.

+ + + + + +
+
+ + + diff --git a/lit-bridge/static/style.css b/lit-bridge/static/style.css new file mode 100644 index 00000000..a7c0d8c2 --- /dev/null +++ b/lit-bridge/static/style.css @@ -0,0 +1,38 @@ +:root { color-scheme: dark; } +* { box-sizing: border-box; } +body { + font-family: ui-sans-serif, system-ui, -apple-system, sans-serif; + background: #0b0d12; color: #e6e8ee; margin: 0; + display: flex; min-height: 100vh; align-items: center; justify-content: center; +} +main { width: 100%; max-width: 480px; padding: 2rem 1.5rem; } +header { display: flex; align-items: center; justify-content: space-between; } +h1 { font-size: 1.5rem; margin: 0; } +.tag { color: #8b93a7; font-size: .9rem; margin: .25rem 0 1.5rem; } +.card { background: #151823; border: 1px solid #232838; border-radius: 14px; padding: 1.25rem; } +.hidden { display: none; } +.row { display: flex; align-items: flex-end; gap: .5rem; } +label { display: flex; flex-direction: column; gap: .35rem; font-size: .85rem; color: #9aa3b8; flex: 1; margin-bottom: 1rem; } +label.amount { position: relative; } +select, input { + background: #0b0d12; color: #e6e8ee; border: 1px solid #2b3142; + border-radius: 9px; padding: .6rem .7rem; font-size: 1rem; width: 100%; +} +select:focus, input:focus { outline: none; border-color: #9ecbff; } +#balance { position: absolute; right: 0; top: 0; font-size: .8rem; } +.muted { color: #8b93a7; font-size: .82rem; } +#quote { margin: -.4rem 0 1rem; min-height: 1.1em; } +button { + background: #2563eb; color: white; border: none; border-radius: 9px; + padding: .7rem 1rem; font-size: 1rem; font-weight: 600; cursor: pointer; width: 100%; +} +button:disabled { background: #2b3142; color: #6b7280; cursor: not-allowed; } +button.ghost { width: auto; background: transparent; border: 1px solid #2b3142; color: #9ecbff; padding: .45rem .7rem; font-size: .85rem; } +#swap { align-self: center; margin-bottom: 1rem; padding: .5rem .6rem; } +.status { margin-top: 1rem; font-size: .85rem; line-height: 1.6; white-space: pre-wrap; word-break: break-word; } +.status .ok { color: #4ade80; } +.status .err { color: #f87171; } +.status a { color: #9ecbff; } +footer { display: flex; justify-content: space-between; align-items: center; margin-top: 1.25rem; } +footer a { color: #9ecbff; font-size: .82rem; } +code { background: #0b0d12; padding: .1rem .35rem; border-radius: 5px; color: #9ecbff; } diff --git a/lit-triggers/src/config.rs b/lit-triggers/src/config.rs index 092d8982..9817b5b9 100644 --- a/lit-triggers/src/config.rs +++ b/lit-triggers/src/config.rs @@ -74,6 +74,21 @@ pub const CHAIN_SPECS: &[ChainSpec] = &[ default_rpc_envvar: "POLYGON_RPC_URL", default_ws_envvar: Some("POLYGON_WS_RPC_URL"), }, + // Testnets — used by lit-bridge's dev relayer (Base Sepolia <-> Arb Sepolia). + ChainSpec { + key: "base-sepolia", + chain_id: 84532, + kind: ChainKind::Evm, + default_rpc_envvar: "BASE_SEPOLIA_RPC_URL", + default_ws_envvar: Some("BASE_SEPOLIA_WS_RPC_URL"), + }, + ChainSpec { + key: "arbitrum-sepolia", + chain_id: 421614, + kind: ChainKind::Evm, + default_rpc_envvar: "ARBITRUM_SEPOLIA_RPC_URL", + default_ws_envvar: Some("ARBITRUM_SEPOLIA_WS_RPC_URL"), + }, ]; pub fn chain_spec_by_key(key: &str) -> Option<&'static ChainSpec> { diff --git a/plans/hyperlane-competitor.md b/plans/hyperlane-competitor.md new file mode 100644 index 00000000..3514cf74 --- /dev/null +++ b/plans/hyperlane-competitor.md @@ -0,0 +1,448 @@ +# Permissionless cross-chain tokens — Hyperlane competitor + +**Status:** draft for discussion +**Owner:** chris@litprotocol.com +**Date:** 2026-06-02 +**Seeded from:** `examples/cross-chain-token` (`action/bridgeAction.js`, `contracts/BridgeToken.sol`) — promoted into a `lit-bridge` crate and retired as a standalone example (see Repo placement) + +**Live (dev, testnet) — confirmed end-to-end 2026-06-02:** +- Registry (Base Sepolia): `0xD1fBb5f03603E82DF13ef94A06b04dC3eA94143D` +- Oracle / signing PKP: `0xe754F8ba7AA0806448430131ca82CE1A1f7CFA7B` · action CID `QmRkM3y3yHH2zzkVJp1BdniJroy7V3mCt8oEurksEgronf` · group `75` +- BridgeToken: Base Sepolia `0xb7F63E48fD5a1d00bC6bAa0202c8b794a7ED18a4` · Arb Sepolia `0xf41e6f64669b01706233c22e90E2ad704d4422DD` +- A 25-token Base→Arb transfer succeeded (manual `bridge.js`): action reached quorum 2 across Alchemy + Infura, signed, minted. (Addresses + the resumable setup live in `lit-bridge/scripts` + the gitignored `.env`.) +- A 10-token Base→Arb transfer succeeded via **relay/auto-broadcast** (`relay.js`): the action verified, signed, and broadcast the mint itself from the oracle account (mint tx status 1, balance confirmed 25→35). Action logic was upgraded (relay mode) with **zero token redeploys** — Option B's payoff: same oracle address, new CID re-pinned. + +**Live (Base + Arbitrum MAINNET) — fully autonomous relayer confirmed 2026-06-03:** +- Registry (Base mainnet): `0xCCFB3F7e038688ab7cb4B568D57fE0E97B374326` +- Oracle/signing PKP unchanged: `0xe754F8ba7AA0806448430131ca82CE1A1f7CFA7B` (group `75`); action CID `QmQxsbVWUCqXsnPkCwRog4DzS9MD91vbRmj3bzEcjX14R4` +- BridgeToken (redeployed with fee + gas-prepay logic): Base `0x1C5004e89FC96082D12D4D3Be77268AE16E2af26` · Arbitrum `0xCCFB3F7e038688ab7cb4B568D57fE0E97B374326`; action CID `QmZ24cPQECJCcQRPm7jGAvP76bwxxWGV9iTYLqeZHnFVV4`; triggers Base `1d5af1d3…`, Arb `742c0657…`. (Addresses churn on each redeploy — `lit-bridge/.env` is the live source of truth.) +- **Fee live: 0.1% (10 bps) skim to a treasury (deployer).** Confirmed: a 1000-token Base→Arb relay split 999 to the recipient + 1 to the treasury, autonomously. +- **Native gas prepay live (IGP-style).** `burn()` is payable; the prepay is escrowed in the source token and emitted in `BurnInitiated`. The relayer **only auto-mints when the prepay covers destination gas** (same-native wei comparison) — confirmed live, and this is what makes bridging an **illiquid token safe**: no prepay → relayer skips (no gas drained), holder can self-submit. `sweepGas` (owner) recovers escrow (unit-tested; live sweep pending a deployer Base-gas refill). +- Relayer is the **production `triggers.litprotocol.com`** instance (added `base-sepolia`/`arbitrum-sepolia` to local `CHAIN_SPECS` for dev, but mainnet `base`/`arbitrum` were already supported — so no triggers deploy needed). Two `chain_event` triggers watch `BurnInitiated`. +- **End-to-end autonomous: a burn on Base auto-minted on Arbitrum with no manual step** — poller fired ~30s after the burn; action reached quorum 2, signed, and broadcast the mint (Arb balance 0→5). Registry reads hardened with retry + two keyless Base endpoints (`mainnet.base.org`, `base-rpc.publicnode.com`) after a single-endpoint flake. +- Note: one pre-fix burn (5 BRDG on Base) is burned-but-unminted (orphan from the flaky run; valueless test token, left as-is). + +## One-line pitch + +Permissionlessly put any token on any chain — same product shape as Hyperlane +Warp Routes, but the verification layer is a content-addressed Lit Action reading +the source chain directly instead of a validator set. **No validators to bootstrap +per route or per chain.** We win on time-to-new-chain, price, and speed; we trade a +validator multisig for "the published action code + the Lit node network + TLS to +named RPCs." + +This plan covers two things: +1. The **product gap** vs Hyperlane (what a turnkey "bridge your token" offering needs). +2. The **trust layer** — the crux — built around the idea of moving RPC config + **on-chain, encrypted, with multi-RPC consensus.** This is what makes "add a new + chain" a config write instead of a code change, and it's where most of this doc goes. + +--- + +## What Hyperlane's product actually is + +"Permissionlessly get a token on a new chain" with Hyperlane = a **Warp Route**, which +is four layers stacked. The protocol is only the bottom one; the rest is what makes it a +*product*: + +| Layer | Hyperlane | What we have today | +|---|---|---| +| Transport | Mailbox on every chain | purpose-built per app (no generic bus — fine, we don't need one) | +| **Security** | ISM + off-chain validators sign Merkle roots | ✅ **the action** — CID-signed, finality-checked, RPC-pinned | +| Delivery + economics | Relayers + Interchain Gas Paymaster | ⚠️ Lit Triggers can broadcast; mint is manual today; no fee model | +| Token app | Warp Route routers (collateral / synthetic / native) | ⚠️ `BridgeToken.sol` is a bespoke demo token, not a router for *existing* tokens | +| Tooling | CLI (`warp deploy/send`), Registry, Explorer | ⚠️ `setup.js` is hand-rolled; no registry; no explorer | + +We already own the hardest layer (security/verification) and do it with a different, +arguably stronger-for-onboarding trust model. The rest of the product is buildable. + +### Product build-list (tracked separately from the trust layer below) +1. **Router standard** — split "the token" from "the bridge": `CollateralRouter` + (locks an existing ERC-20 on its home chain), `SyntheticRouter` (mint/burn wrapped), + `NativeRouter`. Lets people bring *their own* token; `BridgeToken.sol` can't today. +2. **N-chain topology** — hub/spoke routing so a burn on any chain mints on any other, + with replay protection namespaced across all chains. +3. **Automated delivery + economics** — DONE (delivery): the action has a relay mode that + re-verifies, signs, and **broadcasts the mint itself** from the oracle account; a + `lit-triggers` `chain_event` trigger fires it on `BurnInitiated`. Verified end-to-end on + testnet via `scripts/relay.js` (auto-mint, balance confirmed on-chain). lit-triggers reused, + not rebuilt; added `base-sepolia`/`arbitrum-sepolia` to its `CHAIN_SPECS`. + **Ops: DONE** — live on the production `triggers.litprotocol.com` poller (Base + Arbitrum + mainnet); a burn auto-mints on the other chain with no manual step. + **Economics (option 1 — token skim): IMPLEMENTED + tested.** `BridgeToken.mint` mints + `feeFlat + amount*feeBps/1e4` to a treasury and the remainder to the recipient (owner-set + `setFeeConfig`, capped at `MAX_FEE_BPS`=500, fee clamped so the dest mint never reverts on a + burned transfer). 8 Foundry tests cover the signed-mint path + fee math; `setup.js` applies + the config (default 0.1% bps). **LIVE on mainnet** — tokens redeployed with fee logic; a + 1000-token relay split 999/1 to recipient/treasury fully autonomously. **Only pending:** the + treasury→gas conversion loop (deferred — the skim accrues the bridged token, which must be + sold to refill the oracle's gas). +4. **Interfaces** — the `lit-bridge` **web UI** is the primary surface (connect wallet, pick + token + chains, bridge, track). An optional CLI/API covers the "deploy a route" path: + pick token, pick chains, deploy routers, register oracle, wire peers, fund relayer. +5. **Registry + explorer** — `BridgeConfigRegistry` for route/chain discoverability. For v1 the + UI reads transfer status straight from chain (`BurnInitiated` / `usedBurnIds`); a cached + indexer for in-flight status, stuck-transfer recovery, and analytics is a *later, separate* + service (a rebuildable cache over events), added only when performance demands it. + +The rest of this document is **layer 2 (security/verification)**, because that's the part +the encrypted-RPC idea changes and the part everything else trusts. + +--- + +## Repo placement: `lit-bridge`, a deployed service (decided) + +This ships as a **single productized artifact** — a top-level `lit-bridge/` crate, structured +exactly like `lit-payments` / `lit-triggers` (standalone Rocket service + static web UI + +Postgres migrations + `railway.json` + `Dockerfile` + `contracts/`). **No parallel `examples/` +version.** Most users want to plug into what we run, not rebuild it; maintaining a teaching +example *and* a prod app means building everything twice. + +``` +lit-bridge/ # NEW top-level crate, mirrors lit-payments + src/ # Rocket: bridging UI host + /api/config (STATELESS — no DB) + static/ # bridging web UI (connect wallet, pick chains, track) + contracts/ # Foundry: BridgeConfigRegistry.sol + BridgeToken.sol + action/ # the bridge verification action (published; CID pinned) + railway.json + Dockerfile + README.md + └─ drives → lit-triggers # relayer: burn event → bridge action → broadcast mint +``` + +Two consequences that shape the phases: + +- **`examples/cross-chain-token` is the seed, then retired.** Its `bridgeAction.js` and + `BridgeToken.sol` are promoted into `lit-bridge/action` and `lit-bridge/contracts` as the + starting point; the standalone example directory is removed once `lit-bridge` covers it (a + code change for Phase 1, not done in this plan edit). We do not maintain both. +- **The relayer is `lit-triggers`, not new code.** "Automated delivery" (watch burn event → + run the bridge action → broadcast the mint) is exactly a `lit-triggers` chain-event trigger. + `lit-bridge` drives a `lit-triggers` instance rather than reimplementing event-watching and + broadcasting — that collapses an entire build phase into configuration. +- **No database — the service is stateless.** All bridge state already lives on-chain: a + pending transfer is a `BurnInitiated` event, a completed one is `usedBurnIds[burnId] == true` + + `BridgeMint` on the destination. The UI reads that directly. A fast explorer (cached log + scans, stuck-transfer detection, analytics) is a *later, separate* indexer over chain events + — a rebuildable cache, never a dependency of the core service or a source of truth. (We + deliberately did **not** copy `lit-payments`' Postgres layer; bridge state isn't ours to own.) + +--- + +## The core idea: RPC config on-chain, encrypted, with consensus + +### Why today's design hits a wall + +`bridgeAction.js` today: +- Pins the RPC **hostname** per chain in a hardcoded `RPC_HOSTS` table (`action/bridgeAction.js:31-55`). +- Takes the full `srcRpcUrl` (**including the Alchemy API key**) as a caller-supplied param, + validates only its hostname + scheme + chainId + finality, then reads a single RPC. + +Two problems for a product: + +1. **Adding a chain changes the CID.** `RPC_HOSTS` lives in the action source. Edit it → + IPFS CID changes → `getLitActionPrivateKey()` signer address changes → **every deployed + `BridgeToken` must re-point its `bridgeOracle`.** That kills "permissionlessly add a chain." + The code even says so in a comment at `bridgeAction.js:37-39`. +2. **The API key lives on the caller.** Every caller needs a valid premium RPC key, and it + travels in plaintext `js_params`. Bad for a permissionless product. + +### The fix + +Move the per-chain RPC configuration **out of the action source and onto a config-registry +contract on Base**, with the secret (the API key / full URL) **encrypted** so only the +action can read it. Verification reads from **N independent RPCs and requires M-of-N +agreement** on the immutable facts. + +This converts "add a chain" from a code change (new CID, mass redeploy) into a **governed +config write** (no CID change, no redeploys). The CID still secures the *logic*; the +registry secures the *RPC list*. + +### Architecture + +``` + setup (one-time, governed) + ───────────────────────── + encrypt RPC URL (host+API key) ──▶ ciphertext [dark-pool setup.js step 4 pattern] + (CID-pinned encrypt action + vault PKP) + │ + ▼ + BridgeConfigRegistry (Base) + per srcChainId: + expectedChainId, minConfirmations, quorum M + tokenAddr, burnTopic + rpcs[]: alchemy|infura -> { type, encApiKey } + custom -> { type, host, encUrl } + owner = Base Safe (the chipotle-upgrades Safe); emits ConfigChanged + + per bridge op + ───────────── + burn on src ──▶ caller calls bridge action with {burnTxHash, logIndex, srcChainId} + │ + ▼ + ┌──────────────────────────────────────────────────────────┐ + │ bridgeAction (stable CID) │ + │ 1. read config from Base via PINNED bootstrap RPC(s) │ ◀── only thing still in code + │ (M-of-N consensus on the config bytes too) │ + │ 2. Decrypt each rpcs[].encUrl (TEE-only, CID-gated) │ + │ 3. verify decrypted host == plaintext host │ + │ 4. fetch receipt+block from N providers, require M-of-N │ + │ agreement on: status, burnBlock, log addr/topics/data, │ + │ confirmations >= minConfirmations │ + │ 5. sign mint authorization (getLitActionPrivateKey) │ + └──────────────────────────────────────────────────────────┘ + │ signature + ▼ + mint on dest (verifies sig == bridgeOracle) +``` + +### Provider config model (decision #5) + +Each RPC entry is a **tagged union** by provider type. Only the secret is encrypted; the +rest is plaintext on-chain so the action can sanity-check without decryption +(`expectedChainId`, `minConfirmations`, `quorum`, token address, burn-event topic are +per-chain, always plaintext). + +- **`alchemy`** — config supplies `{ type, encApiKey }`. The action holds a code-resident + `chainId → alchemy subdomain` map and **constructs** the URL: + `https://.g.alchemy.com/v2/`. +- **`infura`** — config supplies `{ type, encApiKey }`. Code-resident `chainId → infura + network` map; action constructs `https://.infura.io/v3/`. +- **`custom`** — config supplies `{ type, host (plaintext), encUrl (ciphertext) }` for chains + Alchemy/Infura don't cover yet. After decrypting `encUrl`, assert its hostname `==` the + plaintext `host`, scheme is `https:`, and `eth_chainId == expectedChainId`. + +**Why this is the strong version:** for the two default providers the **hostname is +content-addressed in the action code**, not in config — so a compromised config writer can +only supply a key, never redirect an alchemy/infura read at a malicious host. Only `custom` +entries carry a config-controlled host, and those are gated by the plaintext-host equality +check. Encrypt the API key for alchemy/infura; encrypt the full URL for custom. + +### Default chains shipped out of the box + +The bundled chain set = the **intersection of EVM chains Alchemy and Infura both support** +(Ethereum, Base, Arbitrum, Optimism, Polygon, etc. — authoritative list generated from both +providers' support matrices at build time). Each ships pre-configured with **two** RPCs (one +alchemy, one infura), satisfying the recommended quorum of 2. We supply one Alchemy key and +one Infura key to seed these. + +### How encryption/decryption actually works here (important detail) + +This repo does **not** use classic `accessControlConditions`. Decryption is gated by a +**CID-pinned group + scoped usage key** (verified pattern in `dark-pool/scripts/setup.js` +and `dark-pool/action/encryptOrder.js`): + +- `Lit.Actions.Encrypt({ pkpId, message })` → ciphertext. Anyone can encrypt to a PKP. +- `Lit.Actions.Decrypt({ pkpId, ciphertext })` → plaintext, but **only** when running inside + an action whose CID is pinned to the PKP's group, under that group's scoped usage key. +- So: encrypt the RPC URL against a **bridge vault PKP** whose group pins the bridge action + CID. Only that exact action can decrypt. The decrypted key never leaves the TEE (relies on + Phala TEE confidentiality — consistent with the rest of the system). + +Consequence worth internalizing: the ciphertext is bound to the **PKP + group**, not to a +single CID. A group can hold multiple CIDs. That means we can **upgrade the action's logic +and still decrypt the same stored config** by adding the new CID to the group — *without +re-encrypting every RPC entry*. Group membership therefore becomes a trust lever (adding a +malicious CID could decrypt secrets), so **group admin must sit behind the same governance +as the registry.** + +### Multi-RPC consensus + +For both the **config read** (from Base) and the **burn verification** (from the source +chain), fetch from N independent providers and require **M-of-N agreement**. + +- Consensus is on a **canonical hash of the normalized critical fields**, not the raw + responses (providers differ on irrelevant fields). +- Critical facts for a burn: `receipt.status == 1`, `burnBlock`, the target log's + `address`/`topics`/`data`, and `confirmations >= minConfirmations`. +- **Do not** require agreement on `eth_blockNumber` (head) — providers sit at slightly + different heights. Require each agreeing provider to *independently* report + `head - burnBlock >= minConfirmations`. This is what defangs a single RPC hiding a reorg. +- Liveness: succeed if `M` providers respond and agree, even if others time out + (`N_available >= M`). Fail **closed** otherwise (better to halt than mint wrongly). +- **Quorum policy (decision #4):** code floor on `quorum` is **1** — a chain *may* run on a + single RPC (the escape hatch for chains Alchemy/Infura don't cover and the deployer only has + one URL for). But the **default and recommended quorum is 2**, every bundled default chain + ships with 2, and the CLI/setup should push hard for ≥2. `quorum == 1` is explicitly the + reduced-trust mode — it collapses back to today's single-RPC guarantee (TLS + finality only) + and should be surfaced as such, not silent. +- `minConfirmations` keeps a **floor enforced in code** (CID-secured), so a compromised config + writer still can't set finality to 0. + +Honest caveat: consensus is only as strong as provider **independence**. Several "different" +RPCs that all proxy the same backend (Infura/Alchemy under the hood) defeat the assumption. +The registry should track provider independence; we should *say so* rather than imply N +hostnames == N trust roots. + +--- + +## The bootstrap problem (and its resolution) + +To read the config registry on Base, the action needs a Base RPC — which can't come from the +(encrypted) config, because you need a working RPC to read the config in the first place. + +**Resolution:** exactly **one** thing stays pinned in the action code — a small set of +**Base config-read RPC hostnames** (keyless public Base RPCs are fine; reading public +contract storage needs no premium key). The action requires **M-of-N consensus across these +pinned Base hosts** on the config bytes. Everything else (all source/destination chains, +their keyed RPCs, finality, quorum) moves to the registry. + +Net: code pins one bootstrap surface (how to reach Base config); config provides the rest. +Adding a *bridged* chain = pure config. Only changing the *config-registry chain itself* +(Base) touches code. That's the whole win. + +Cost: every bridge op now does one extra chain read (Base), parallelizable, and the bridge +gains a **liveness dependency on Base** — fail-closed, so acceptable. + +Alternative considered: pass a **governance-signed config blob** in params (action verifies +the signature over `(config, epoch)`) to avoid the Base read entirely. Avoids the Base +liveness dependency but reintroduces a key/epoch distribution problem. **Decided (#2): read +from Base each op.** Revisit the signed-blob optimization only if Base reads later become a +latency or availability issue. + +--- + +## The signer: Option B, PKP / chain-secured account (decision #1 + #3) + +The encrypted-config design makes **adding chains** cheap but does not, by itself, fix +**logic upgrades** — with a CID-derived signer (`getLitActionPrivateKey()`), changing the +action's code rotates the signer and forces re-pointing `bridgeOracle` on every token. + +**Decided: Option B.** The action signs mints with a **dedicated PKP / account** +(`getPrivateKey({ pkpId })`), not its CID key. The signer address = the account, **stable +across logic upgrades**. Upgrading the action = add the new CID to the account's group; the +`bridgeOracle` on every `BridgeToken` never changes. Trust for *which code may sign* shifts to +"the group's authorized-CID set is honest" — gated by governance (the Base Safe, #3). + +### Custody path: api-key account now → chain-secured account + Safe later + +- **During dev:** the signing account is a normal **api-key account** (chipotle). Fast to + iterate; no on-chain governance wiring yet. +- **Once it works end-to-end:** convert it to a **ChainSecured account owned by the existing + Base Safe** — the same Safe used for chipotle upgrades — via + `transferChainSecuredAccountOwnership` (see NODE-4979 / commit `cdc62221`). After conversion, + the Safe is the sole authority that can change the account's auth and (by extension) govern + the group's authorized-CID set. This is the single governance root for both the config + registry (#3) and action upgrades. + +The content-addressed guarantee doesn't disappear — it still secures the *logic, finality +floors, and consensus rules* of whatever CID is authorized. We're only decoupling the +*signer identity* from the CID so the product can ship bug fixes without a fleet-wide redeploy. + +--- + +## Honest trust framing (load-bearing) + +Be precise about what changes. Today: *"the published action code does what it says, and TLS +to the named RPC isn't compromised."* After this plan: + +> The mint signature is honored iff: (a) the **action code** (CID) does what it says — the +> logic, finality floors, provider hostname maps, and consensus rules are content-addressed; +> (b) the **Lit node network** runs it honestly inside the TEE; (c) the **config registry on +> Base** and the **account's authorized-CID set** weren't maliciously changed — both gated by +> the **Base Safe** with public `ConfigChanged` events; (d) **M-of-N independent RPC +> providers** agree on the burn facts (M defaults to 2; M=1 is opt-in reduced trust); and +> (e) TLS to those hosts holds. + +What moved: a slice of trust shifts from "code hash" to **"Base Safe governance of the config +registry + the account's CID allowlist."** What we bought: chains are added without redeploys, +the API key never touches callers, action bug fixes ship without re-pointing every token's +oracle, and (at quorum ≥2) a single lying/compromised RPC can no longer forge a mint. + +Compared to Hyperlane: they trust a **validator multisig + relayer**; we trust **published +code + node network + governed config + RPC consensus**. Neither strictly dominates — our +pitch is *"no validator set to bootstrap, and you can add a chain in a config tx."* + +### Threats and mitigations +| Threat | Mitigation | +|---|---| +| Compromised config writer points oracle at evil RPC | alchemy/infura hostnames are **constructed in code** (CID-secured) — config can't redirect them, only supply a key; `custom` entries gated by plaintext-host equality check; Base Safe governs all writes via public events | +| Config writer sets finality to 0 | `minConfirmations` floor enforced **in code** (CID-secured), not in config | +| Config writer sets quorum to 1 | allowed **by design** (escape hatch for single-RPC chains) but defaults to 2 and is surfaced as reduced trust; bundled chains all ship at 2 | +| Single lying/compromised RPC forges a receipt or hides a reorg | at quorum ≥2, M-of-N consensus on canonical critical-fact hash + per-provider independent confirmation check | +| "Independent" RPCs share one backend | track + surface provider independence; don't overclaim N == N trust roots | +| Base unavailable / config-read fails | fail **closed** (bridge halts; no bad mint) | +| Attacker uploads own ciphertext to registry | registry writes are Safe-gated; decrypt is CID-gated; post-decrypt host check (custom) / code-constructed host (alchemy/infura) | +| Decrypted API key in node memory | TEE (Phala) confidentiality, same posture as the rest of the system | +| Malicious CID added to the signing account's group | account is **chain-secured, owned by the Base Safe**; only the Safe can change auth/CID set; public events | + +--- + +## Phases (check off as you go) + +- [x] **Phase 0 — Scaffold `lit-bridge`.** Create the top-level crate from the + `lit-payments`/`lit-triggers` template (Rocket + static + `railway.json` + `Dockerfile`), + **stateless — no DB** (bridge state lives on-chain). Promote `examples/cross-chain-token`'s + `bridgeAction.js` → `lit-bridge/action` + and `BridgeToken.sol` → `lit-bridge/contracts`; **remove the standalone example** once + parity is confirmed. All later phases land in `lit-bridge`. +- [x] **Phase 1 — Multi-RPC consensus in the action.** In `lit-bridge/action`, burn facts are + fetched from N providers and require M-of-N agreement on a canonical critical-fact string; + per-provider finality check; fail-closed; quorum floor 1, default 2. Pure logic split into + unit-tested helpers (`node --test`, 15 passing — incl. "a single lying RPC cannot forge at + quorum 2"). +- [x] **Phase 2 — Signer → dedicated account (Option B).** Action signs via + `getPrivateKey({ pkpId: BRIDGE_PKP_ID })`; `BridgeToken` trusts an immutable oracle address. + Live: account created, oracle address derived (== PKP address, confirmed by a deriver + action) and pinned in both tokens. +- [ ] **Phase 2 — Signer → dedicated account (Option B), dev mode.** Switch mint signing from + `getLitActionPrivateKey()` to `getPrivateKey({ pkpId })` for a dedicated **api-key + account** (chipotle). Update `BridgeToken.bridgeOracle` to the account address. Authorize + the bridge action CID on the account's group. Gets the contracts onto the final trust + model before any registry work. +- [x] **Phase 3 — `BridgeConfigRegistry` + provider-type model + encrypt-and-publish.** + Contract done (Foundry, Ownable2Step; tagged-union RPC entries; 6 `forge test` passing). + `scripts/setup.js` runs the full encrypt-and-publish: encrypts the Alchemy + Infura keys + against the PKP and writes both chains' config (quorum 2). Live and verified. +- [x] **Phase 4 — Action reads config from Base.** Registry-host allowlist + consensus on the + config read, alchemy/infura URLs built from code-resident maps, `custom` host-equality + check, `RPC_HOSTS` gone, callers no longer supply keys. Verified end-to-end against the + deployed registry (a live transfer decrypted both keys in-TEE and reached quorum). +- [~] **Phase 5 — Ship the default chain set.** Demo pair (Base Sepolia ↔ Arb Sepolia) live at + quorum 2 with a confirmed transfer. **Pending:** generate the full Alchemy ∩ Infura EVM + chain list and seed each. +- [~] **Phase 6 — Governance handoff to the Base Safe** (`0xF4D0…fD2A`). Fresh **production** + instance launched on a new dedicated account (new oracle, `Ownable2Step` tokens, registry, + fee treasury = Safe) — dev instance left untouched. `BridgeToken` made `Ownable2Step` (was + un-transferable). **Done:** contract ownership of registry + both tokens *proposed* to the + Safe (handoffToSafe.js, two-step) and fee → Safe (confirmed live). **Pending:** Safe must + `acceptOwnership()` ×3; and the **irreversible** Lit account chain-secure (convert → + `transferChainSecuredAccountOwnership` → Safe, on Base 8453). Current prod addresses live in + `lit-bridge/.env` + memory. `BridgeToken` trusts the oracle signature alone — no epoch (#6). + **Account chain-secure DONE** (user converted it; account now Safe-owned). Remaining: the 3 + routine `acceptOwnership()` Safe txs for registry + tokens. +- [~] **Phase 7 — Hardening + adversarial review.** Codex adversarial pass done (7 findings). + Action-side fixes implemented + unit-tested (21 tests), **no contract redeploy** (destination + resolved from `bridgePartner` under consensus): registry read quorum≥2 + distinct hosts (the + critical one — a single lying bootstrap RPC could forge mints), dest-from-`bridgePartner` + + gas cap == prepay quote, same-native relay guard, distinct-host quorum, dest-RPC chainId + check. **#4 (finality) partial** — depth is Safe-governed `minConfirmations`; true + `finalized` finality needs a retry poller (single-fire trigger can't wait) → follow-up. + **DEPLOYED + validated**: hardened action `QmSt8Z…1miGz` re-pinned via a Safe-signed + `addActionToGroup` (master apiKeyHash, not the Safe alias — see `docs/upgrading-the-action.md`) + and confirmed end-to-end (5-token Base→Arb auto-relay: 4.995 net + 0.005 fee to Safe). + Registry read hardened to 3 reliable keyless endpoints + retries after a quorum-2 flake. + +--- + +## Decisions (locked in 2026-06-02) +1. **Signer: Option B.** Dedicated account (PKP), not CID-derived. Start as an api-key + account; convert to a **ChainSecured account owned by the existing Base Safe** (the + chipotle-upgrades Safe) once it works, via `transferChainSecuredAccountOwnership`. +2. **Config delivery: read from Base each op.** Signed-config-blob optimization deferred. +3. **Governance: the Base Safe** owns both the config registry and the signing account. +4. **Quorum: floor 1, default & recommended 2.** All bundled default chains ship at 2. + `quorum == 1` is the opt-in escape hatch for chains only one provider/URL covers, surfaced + as reduced trust. `minConfirmations` keeps a hard code floor. +5. **Provider types:** `alchemy` / `infura` (supply api key + chainId; action constructs & + checks the hostname from code-resident maps) and `custom` (full URL string for chains the + two don't cover yet; plaintext host + encrypted URL). Default chain set = Alchemy ∩ Infura + EVM support, seeded with one key each. +6. **Destination trusts the oracle signature alone** — `BridgeToken` does *not* check a config + epoch. + +## Out of scope for v1 (mention as "going further") +- Generic message bus (Mailbox equivalent) — we don't need it for tokens. +- Light-client / ZK verification of source-chain state (consensus-over-RPCs is the v1 stance). +- Non-EVM source chains. +- The full registry/explorer product surface (separate plan; see product build-list above). + +