Sign

The sign method calculates an Ethereum specific signature with: sign(keccak256("\x19Ethereum Signed Message:\n" + len(message) + message))).

By adding a prefix to the message makes the calculated signature recognisable as an Ethereum specific signature. This prevents misuse where a malicious DApp can sign arbitrary data (e.g. transaction) and use the signature to impersonate the victim.

Note: the address to sign with must be unlocked.

Parameters

• DATA, 20 Bytes - address

• DATA, N Bytes - message to sign

Returns

• DATA: Signature

POSThttps://tomo.nownodes.io/sign

Body

application/json

jsonrpc*string

method*string

params*array of string

id*integer (int32)

Response

200500

Successful Operation

Request

JavaScriptCurlPython

const response = await fetch('https://tomo.nownodes.io/sign', {
    method: 'POST',
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      "jsonrpc": "2.0",
      "method": "eth_sign",
      "params": [
        "0x9b2055d370f73ec7d8a03e965129118dc8f5bf83",
        "0xdeadbeaf"
      ],
      "id": 1
    }),
});
const data = await response.json();