Sign Typed Data

EIP-712 typed data: inspect domain separator, struct hash and digest, then sign.

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EIP-712 · eth_signTypedData_v4

Private key

Typed data JSON (types · primaryType · domain · message)

{
  "types": {
    "EIP712Domain": [
      {
        "name": "name",
        "type": "string"
      },
      {
        "name": "version",
        "type": "string"
      },
      {
        "name": "chainId",
        "type": "uint256"
      },
      {
        "name": "verifyingContract",
        "type": "address"
      }
    ],
    "Permit": [
      {
        "name": "owner",
        "type": "address"
      },
      {
        "name": "spender",
        "type": "address"
      },
      {
        "name": "value",
        "type": "uint256"
      },
      {
        "name": "nonce",
        "type": "uint256"
      },
      {
        "name": "deadline",
        "type": "uint256"
      }
    ]
  },
  "primaryType": "Permit",
  "domain": {
    "name": "USD Coin",
    "version": "2",
    "chainId": 1,
    "verifyingContract": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
  },
  "message": {
    "owner": "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266",
    "spender": "0x70997970C51812dc3A010C7d01b50e0d17dc79C8",
    "value": "1000000",
    "nonce": "0",
    "deadline": "1893456000"
  }
}

primary type: Permit
domain separator: 0x06c37168a7db5138defc7866392bb87a741f9b3d104deb5094588ce041cae335
digest to sign: 0xd50eeefda754913009864c6a3837aefbc2059131e467d46349885e92e1be6313