feat: Confidential transactions

Cargo.toml

@@ -33,12 +33,21 @@ bincode = "1.3.3"
 clap = { version = "4.5.23", features = ["derive"] }
 once_cell = "1.20.2"
 tracing-subscriber = "0.3.19"
-k256 = { version = "0.13.4", features = ["ecdh"] }
+k256 = { version = "0.13.4", features = ["ecdh", "ecdsa", "serde"] }
 rand = "0.9.0"
 rand_core = "0.9.0"
 ark-ff = "0.5.0"
+base64 = "0.22.1"
+bulletproofs = "5.0.0"
+merlin = "3.0.0"
+curve25519-dalek = "4.1.3"
+lazy_static = "1.5.0"
 
 
 [[bin]]
 name = "build-transaction"
 path = "src/build-transaction.rs"
+
+[[bin]]
+name = "run-node"
+path = "src/node_runner.rs"

ReadMe.md

@@ -11,7 +11,7 @@ Enokiweave is a block-lattice cryptocurrency designed for sub-second transaction
 
 ## How It Works
 
-Enokiweave uses a block-lattice structure where each account operates its own blockchain. This allows for:
+Enokiweave uses a directed acyclic graph structure which allows for:
 
 - Immediate transaction processing without global consensus bottlenecks
 - Parallel validation of transactions across different account chains
@@ -30,30 +30,49 @@ git clone https://github.com/enokiweave/enokiweave
 
 # Run the node
 ```bash
-cargo run --bin enokiweave -- --genesis-file-path ./setup/example_genesis_file.json --rpc_port 3001
+cargo run --bin run-node -- --genesis-file-path ./setup/example_genesis_file.json --rpc-port 3001
 ```
 
 # Send a transaction (the node needs to be running)
 ```bash
 curl -X POST http://localhost:3001 \
 -H "Content-Type: application/json" \
 -d '{
-    "jsonrpc": "2.0",
-    "method": "submitTransaction",
-    "params": [
-        {
-            "from": "0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20",
-            "to": "201f1e1d1c1b1a191817161514131211100f0e0d0c0b0a090807060504030201",
-            "amount": 100,
-            "public_key": "3b6a27bcceb6a42d62a3a8d02a6f0d73653215771de243a63ac048a18b59da29",
-            "signature": {
-                "R": "d3b9bc2c6224e1b0d327f83f2fba25b66f58ea7c87c98a90b9f7f99f4e870be4",
-                "s": "0acefe7c263262675dc07f0f270795cf319bd0bb8734dda8d28f055bfa1aa70f"
-            },
-            "timestamp": 1734345081238,
-            "id": "19c44707ea1cc53b699190bea179582b2e947bb59d9695da5961b9cc11e7dd93"
+  "id": 1,
+  "jsonrpc": "2.0",
+  "method": "submitTransaction",
+  "params": [
+    {
+      "amount": {
+        "Confidential": {
+          "quorum": {
+            "c1": "A81XNukTrG8hCg3UR42jxZOuto32so09ygcug49EZOaL",
+            "c2": "ArqdwyfIa1fWPOl5Tbmgi99fs3QWWJb2+PIrzwbSiB38",
+            "range_proof": "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"
+          },
+          "recipient": {
+            "c1": "AmZUcbkVn00B13l/PAuhSdnCl2e1hV1zekO6KFjEa2Os",
+            "c2": "AnV7SKWnnkaNoqw2AsdZkI6iLTRYno9XXpu+1Qasr//+",
+            "range_proof": "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"
+          },
+          "sender": {
+            "c1": "Avpd1MdI4mwBfMLdyyDR9Qr3BDFELiKvApX3gcMDgDjy",
+            "c2": "AhRI67yjl9CWoZCbsHT34lFCokgOg5tQglnmLSnDB2Pw",
+            "range_proof": "wnkgzlnj9klbHG9qIvJA9mUnGCIjK2inL/8LeWxzRQSg8vbFxuW4KPcWEGGsqbxWrPFtxYx3pbss1uDhyy18c2yG2vZ5shPo0vxS4dhXxR959F5daLdulObvDfX9DQE/tHdaOu/qpBElEBicm+bae+31KA+ehHfnbXJJtZ68HyXfFoxdEMUdQZQUZf5WBjQjwcUVI1Zj/eKAXgGp8pixA/wAFzK7808YBzN4jUq+W4nC9IFyLKQg8O1pM/M1dNoKyo5NSIG6MgC3OKnDt/ZWb4HRUHwZUB+eJhNNi9jOOAM27QS7wp8ZqEp4xZyU8uVh4IIy5Wijk7ONVGGd4GxuX0Inyk1X94FETxeXoXM9WWitCCLMnZ7KG32R91qNJx9VLqxLgGLK0hFnQcK4xBnGf54kMBqel+sb7flphscPMiNs9MEfXCH2B1LnylwqHuqu8m/ixCC8xuZcGZDLP3ZRWeZoVaNY4otKmt0EhNIkqoCXXl4uOly5eYko0+1tQE9Vavi0eSqOTxwoVSMmLtvVc/meCawrR2/lVmYKuM740XMcxMQSGonK2ZLYjoOBZPOTJUGkijK5DsL6+LTXuwcIb5xNQxpAzXTDbAOOUfr15cK1kpP+h9kPIwbJrwGTjN8KzAWs/qf3K704ktBTqhZAa0uZtIvBwGLe3wfP47enU0xoSMCTB0jfjkIFXhkQgmLGW8rFFbJ0OEomzmsRDSrcXWhsrkt6gfwgyll5YRTDnUr38DuAnkeryqwHDq3Jk3J6uIoTiGOFQsFJ+d2vCepwcuzXeqM2uCk33+eSnRPLqTi+4RUbrJjWT5b3xpOM0pRWmlRGxLZ5CclVqzXeJCLwC5vrptMXScggMDS98qtEWFDxIPB8kY/WWiUjGCb/CAEF"
+          }
         }
-    ]
+      },
+      "from": "0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20",
+      "previous_transaction_id": "0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20",
+      "public_key": "04c2a4c3969a1acfd0a67f8881a894f0db3b36f7f1dde0b053b988bf7cff325f6c3129d83b9d6eeb205e3274193b033f106bea8bbc7bdd5f85589070effccbf55e",
+      "signature": {
+        "R": "44152312c43cac7f0f3d6be1e72c9e746166d291d42f9f64e3b2a257ad1fb49f",
+        "s": "325bd5f08af004e2533f8ba80fc27370399e5767f28422683d17dc49718ac750"
+      },
+      "timestamp": 1738970684326,
+      "to": "201f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020f"
+    }
+  ]
 }'
 ```
 
@@ -71,8 +90,7 @@ curl -X POST http://localhost:3001 \
 # Build a transaction that you can send via a JSON-RPC request
 ```bash
 cargo run --bin build-transaction -- \
---sender 0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20 \
---recipient 201f1e1d1c1b1a191817161514131211100f0e0d0c0b0a090807060504030201 \
+--recipient-pubkey 04e29636fe0c4c8a9971407f70e957708d6c98dc23ae91a5426e18f3bca7c4f3cf8d86f89b7091202f9a3168a254eaa29ab882157132c4cb91c218e3dba76c1b16 \
 --amount 100 \
---private-key 0000000000000000000000000000000000000000000000000000000000000000
+--inputs 00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff:0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20
 ```

src/address.rs

@@ -1,12 +1,52 @@
 use anyhow::Result;
+use ark_ff::PrimeField;
+use k256::elliptic_curve::ecdh::diffie_hellman;
+use k256::{elliptic_curve::sec1::ToEncodedPoint, PublicKey, SecretKey};
 use serde::{Deserialize, Serialize};
 
 pub const ZERO_ADDRESS: Address = Address([0; 32]);
+const THRESHOLD_FLAG: u8 = 0x80;
+
+pub struct StealthAddress {
+    pub ephemeral_public: PublicKey,
+    pub stealth_public: PublicKey,
+}
 
 #[derive(Debug, PartialEq, Eq, Hash, Serialize, Deserialize, Clone, Copy)]
 pub struct Address(pub [u8; 32]);
 
 impl Address {
+    pub fn generate_stealth(
+        receiver_pub: &PublicKey,
+        ephemeral_secret_key: &SecretKey,
+    ) -> Result<(Self, PublicKey)> {
+        let shared_secret = diffie_hellman(
+            ephemeral_secret_key.to_nonzero_scalar(),
+            receiver_pub.as_affine(),
+        );
+
+        // Convert shared secret to new public key point
+        let point = PublicKey::from_sec1_bytes(shared_secret.raw_secret_bytes().as_slice())?;
+        let stealth_pub = receiver_pub.to_projective() + point.to_projective();
+        let stealth_pub = PublicKey::from_affine(stealth_pub.to_affine())?;
+
+        let mut addr = [0u8; 32];
+        addr.copy_from_slice(&stealth_pub.to_encoded_point(true).as_bytes()[..32]);
+        Ok((Self(addr), stealth_pub))
+    }
+
+    pub fn is_threshold_group(&self) -> bool {
+        self.0[0] & THRESHOLD_FLAG != 0
+    }
+
+    pub fn to_zk_field<F: PrimeField>(&self) -> Result<F> {
+        Ok(F::from_be_bytes_mod_order(&self.0))
+    }
+
+    pub fn from_commitment(commitment: &[u8; 32]) -> Self {
+        Self(*commitment)
+    }
+
     pub fn new(data: [u8; 32]) -> Self {
         Self(data)
     }