sPOL Contracts

Liquid staking protocol for POL on Ethereum. Users deposit POL and receive sPOL, a transferable ERC-20 that represents a share of the staked pool. The protocol delegates across a managed set of validators, compounds rewards, and exposes the token on both Ethereum (L1) and Polygon (L2) via Polygon's state-sync bridge.

Architecture

Contract	Chain	Role
sPOLController	L1	Core staking logic -- validator management, POL/sPOL conversions, reward compounding, unbonding queue
sPOL	L1	ERC-20 token (mint/burn gated to the controller) with EIP-2612 permit support
sPOLMessenger	L1	Bridge coordinator -- relays exchange-rate updates, processes migration and backfill proofs from L2
sPOLChild	L2	L2 sPOL ERC-20 + buy operations using a cached exchange rate, initiates surplus-POL migrations to L1
PolBridger	L1 + L2	Handles POL bridging between chains via the Polygon PoS bridge
MsgCoder	--	Shared logic for cross-chain message encoding/decoding

Setup

Requires Foundry.

Install dependencies

forge soldeer install

Build

forge build

Copy .env.example to .env and fill in the values:

cp .env.example .env

You will need:

• DEPLOYER_PRIVATE_KEY -- deployer account private key
• L1_RPC_URL -- Ethereum RPC endpoint
• L2_RPC_URL -- Polygon PoS RPC endpoint

Testing

Unit and integration tests

forge test

Coverage (excludes scripts, mocks, messaging libs, and integration tests)

forge coverage --no-match-coverage "(script|mocks|msg|integration)"

Integration tests fork mainnet and require L1_RPC_URL / L2_RPC_URL to be set.

Audits

Reports are in audits/ sorted by tag:

• ChainSecurity -- Polygon sPOL audit
• Certora -- Polygon sPOL staking audit

Deployments

Mainnet

Ethereum

Contract	Address
sPOL	0x3B790d651e950497c7723D47B24E6f61534f7969
sPOLController	0xEaadA411F2600570796c341552b9869DA708a28B
sPOLMessenger	0x0356e303B375D5a11D9Eb7d57DBF544FeE6972C9
AccessManager	0x2c91c02793a50f6D55168a88183da687F572d350
PolBridger	0x71663898Df7470e3b64d52663Ff975895E9b06E8

Polygon PoS

Contract	Address
sPOLChild	0xd1CD49A08AeF3Af93457aEc17C786C2b7F48eCd7
AccessManager	0x2c91c02793a50f6D55168a88183da687F572d350
PolBridger	0x71663898Df7470e3b64d52663Ff975895E9b06E8

Testnet

Sepolia

Contract	Address
sPOL	0x98Cf9fD00217420e64a47F3682E5dE06D8Ef635a
sPOLController	0xA637f4BA0E8831Fa2cb7f9939D17BdAF2c48D998
sPOLMessenger	0xe5De910D9D943E2a5773a9e6b5488d6b3b72AB03
AccessManager	0xf89F0D616f777fA55c4Afdb4E1D485c81403B585
PolBridger	0x2B98234D09ed762a047992eD6e163F806CE477Db

Amoy

Contract	Address
sPOLChild	0x3c7A9412B9AB03AaD2129A2C2159372516011E45
AccessManager	0xf89F0D616f777fA55c4Afdb4E1D485c81403B585
PolBridger	0x2B98234D09ed762a047992eD6e163F806CE477Db

License

Copyright © 2026 PT Services DMCC
Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.
The SPDX license identifier for this project is MIT OR Apache-2.0.