go4337/hash.html at main · san-lab/go4337 · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>ERC-4337 v0.7 UserOp Hash (Correct)</title>
  <script src="https://cdn.jsdelivr.net/npm/ethers@6.10.0/dist/ethers.umd.min.js"></script>
  <style>
    body { font-family: monospace; max-width: 1100px; margin: 20px auto; }
    textarea, input { width: 100%; margin-bottom: 10px; font-family: monospace; }
    textarea { height: 320px; }
    button { padding: 10px; font-size: 16px; }
    .out { background: #f5f5f5; padding: 10px; word-break: break-all; }
    .label { font-weight: bold; margin-top: 10px; }
  </style>
</head>
<body>

<h2>ERC-4337 v0.7 UserOperation Hash Generator (Correct)</h2>

<label>UserOperation JSON</label>
<textarea id="userop">
{
  "sender": "0x72174f7cDC903D525c3fA82F10a7898FbB6edfBA",
  "nonce": 12,
  "factory": "0x",
  "factoryData": "0x",
  "callData": "0xb61d27f600000000000000000000000095c2b3a7bdc545f68df148ad17034a1fe356600200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000000406661abd00000000000000000000000000000000000000000000000000000000",
  "callGasLimit": 17955,
  "verificationGasLimit": 41810,
  "preVerificationGas": 50561,
  "maxFeePerGas": 1888271,
  "maxPriorityFeePerGas": 110000,
  "paymaster": "0x777777777777AeC03fd955926DbF81597e66834C",
  "paymasterVerificationGasLimit": 35470,
  "paymasterPostOpGasLimit": 1,
  "paymasterData": "0x01000069298896000000000000461851e09143dc101ec4cfc8637f1879c57bde11672a3f1e5a7a9284005f609016c4d9f4b255a943c09aff3cdecac931128e3f6c99253f093a3aa0633458e5491c",
  "signature": "0x943aa83d93d125336f5f862ccbe742797fa34c38065b634e6dbbc6b302f3d85429b1c1c2bab35d7df8d70209e445f98aa51467ef438ee39cb474a15b336858811c"
}
</textarea>

<label>EntryPoint</label>
<input id="entrypoint" value="0x0000000071727De22E5E9d8BAf0edAc6f37da032" />

<label>Chain ID</label>
<input id="chainid" value="84532" />

<button onclick="compute()">Compute Hashes</button>

<div class="out">
  <div class="label">Raw UserOp Hash</div>
  <div id="raw">—</div>
  <div class="label">Final UserOp Hash</div>
  <div id="final">—</div>
</div>

<script>
function packUint128Pair(a, b) {
  return ethers.zeroPadValue(
    ethers.toBeHex(
      (BigInt(a) << 128n) | BigInt(b)
    ),
    32
  );
}

function compute() {
  const abi = ethers.AbiCoder.defaultAbiCoder();
  const op = JSON.parse(document.getElementById("userop").value);
  const entryPoint = document.getElementById("entrypoint").value;
  const chainId = BigInt(document.getElementById("chainid").value);

  const norm = v => (v && v !== "0x") ? v : "0x";

  /* -----------------------------
     Raw byte construction
  ------------------------------*/

  const initCode = ethers.concat([
    norm(op.factory),
    norm(op.factoryData)
  ]);

  const paymasterAndData = ethers.concat([
    op.paymaster, // EXACT 20 bytes
    packUint128Pair(
      op.paymasterVerificationGasLimit,
      op.paymasterPostOpGasLimit
    ),             // EXACT 32 bytes
    norm(op.paymasterData)
  ]);

  /* -----------------------------
     Packed uint256 gas fields
  ------------------------------*/

  const accountGasLimits =
    (BigInt(op.verificationGasLimit) << 128n) |
    BigInt(op.callGasLimit);

  const gasFees =
    (BigInt(op.maxPriorityFeePerGas) << 128n) |
    BigInt(op.maxFeePerGas);

  /* -----------------------------
     PackedUserOperation (raw)
  ------------------------------*/

  const packedUserOp = {
    sender: op.sender,
    nonce: BigInt(op.nonce),
    initCode,
    callData: norm(op.callData),
    accountGasLimits,
    preVerificationGas: BigInt(op.preVerificationGas),
    gasFees,
    paymasterAndData
  };

  console.log("=== PackedUserOp (EntryPoint-level) ===");
  console.log(packedUserOp);
  console.log("initCode bytes:", initCode);
  console.log("callData bytes:", packedUserOp.callData);
  console.log("paymasterAndData bytes:", paymasterAndData);
  console.log("accountGasLimits:", accountGasLimits.toString());
  console.log("gasFees:", gasFees.toString());

  /* -----------------------------
     Hashing (EntryPoint logic)
  ------------------------------*/

  const encodedForHash = abi.encode(
    [
      "address",
      "uint256",
      "bytes32",
      "bytes32",
      "uint256",
      "uint256",
      "uint256",
      "bytes32"
    ],
    [
      packedUserOp.sender,
      packedUserOp.nonce,
      ethers.keccak256(packedUserOp.initCode),
      ethers.keccak256(packedUserOp.callData),
      packedUserOp.accountGasLimits,
      packedUserOp.preVerificationGas,
      packedUserOp.gasFees,
      ethers.keccak256(packedUserOp.paymasterAndData)
    ]
  );

  const rawHash = ethers.keccak256(encodedForHash);

  const finalHash = ethers.keccak256(
    abi.encode(
      ["bytes32", "address", "uint256"],
      [rawHash, entryPoint, chainId]
    )
  );

  console.log("rawUserOpHash:", rawHash);
  console.log("finalUserOpHash:", finalHash);

  document.getElementById("raw").innerText = rawHash;
  document.getElementById("final").innerText = finalHash;
}
</script>

</body>
</html>