personal_sign

Sign data using a specific account with Ethereum-specific signature format

Defined in EIP-191

Signs data using a specific account. This method calculates an Ethereum specific signature with: sign(keccak256("\x19Ethereum Signed Message:\n" + len(message) + message))).

Parameters

data · string · required

The data to sign, in hexadecimal format.

address · string · required

The address of the account that should sign the data.

Returns

result · string

A signature string in hexadecimal format.

Example Usage

Request

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "personal_sign",
  "params": [
    "0x48656c6c6f2c20576f726c6421",
    "0xd46e8dd67c5d32be8058bb8eb970870f07244567"
  ]
}

Success Response

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": "0x30755ed65396facf86c53e6217c52b4daebe72aa4941d89635409de4c9c7a9466d0e6928a2e2d2e8f8e8c8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e8e"
}

Error Handling

code · number

Error code indicating the type of error that occurred.

message · string

Human-readable error message describing what went wrong.

Code	Message	Description
4001	User denied signature request	User rejected the signing request
4100	Requested method not supported	The method is not supported by the wallet
4200	Wallet not connected	No wallet connection available
4300	Invalid parameters	The provided parameters are invalid

Always verify signatures on the server side before trusting them. Client-side signature verification should only be used for UX purposes.