eth_sign - BSC

Example code for the eth_sign JSON RPC method. Сomplete guide on how to use eth_sign JSON RPC in GetBlock Web3 documentation.

The eth_sign method requires the account to be unlocked on the node. It is not available on public RPC endpoints. Use client-side signing libraries (e.g., ethers.js, viem) for signing when using public RPCs.

The eth_sign method calculates an Ethereum-specific signature for the given data.

Parameters

Parameter

Type

Required

Description

address

string

Yes

Address to sign with

message

string

Yes

Data to sign (hex)

Returns

Field

Type

Description

result

string

Signature (65 bytes hex)

Request Example

curl

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_sign",
    "params": [
        "0x8D97689C9818892B700e27F316cc3E41e17fBeb9",
        "0x48656c6c6f20576f726c64"
    ],
    "id": "getblock.io"
}'

example.js

const axios = require('axios');

const url = 'https://go.getblock.io/<ACCESS-TOKEN>/';

const payload = {
    jsonrpc: '2.0',
    method: 'eth_sign',
    params: [
        '0x8D97689C9818892B700e27F316cc3E41e17fBeb9',
        '0x48656c6c6f20576f726c64'
    ],
    id: 'getblock.io'
};

axios.post(url, payload, {
    headers: { 'Content-Type': 'application/json' }
})
.then(response => console.log(response.data))
.catch(error => console.error(error));

example.py

import requests

url = "https://go.getblock.io/<ACCESS-TOKEN>/"

payload = {
    "jsonrpc": "2.0",
    "method": "eth_sign",
    "params": [
        "0x8D97689C9818892B700e27F316cc3E41e17fBeb9",
        "0x48656c6c6f20576f726c64"
    ],
    "id": "getblock.io"
}

response = requests.post(url, headers={"Content-Type": "application/json"}, json=payload)
print(response.json())

main.rs

use reqwest::Client;
use serde_json::json;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();
    
    let payload = json!({
        "jsonrpc": "2.0",
        "method": "eth_sign",
        "params": [
            "0x8D97689C9818892B700e27F316cc3E41e17fBeb9",
            "0x48656c6c6f20576f726c64"
        ],
        "id": "getblock.io"
    });

    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&payload)
        .send()
        .await?;

    let result: serde_json::Value = response.json().await?;
    println!("{:#?}", result);
    
    Ok(())
}

Response Example

response.json

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "error": {
        "code": -32000,
        "message": "unknown account"
    }
}

Response Parameters

Parameter

Type

Description

result

string

Signature (if supported)

error

object

Error for public RPCs

Use Cases

Message signing (local nodes)
Authentication systems
Off-chain signatures

Error Handling

Error Code

Description

-32601

Method not supported

-32000

Account not unlocked

SDK Integration

ethers.js

const { ethers } = require('ethers');

// Sign locally with wallet
const wallet = new ethers.Wallet(privateKey);

const message = 'Hello World';
const signature = await wallet.signMessage(message);
console.log('Signature:', signature);

viem.js

import { privateKeyToAccount } from 'viem/accounts';

const account = privateKeyToAccount('0x...');

const signature = await account.signMessage({
    message: 'Hello World'
});
console.log('Signature:', signature);

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