eth_sign - Polygon

Example code for the eth_sign json-rpc method. Сomplete guide on how to use eth_sign json-rpc in GetBlock.io Web3 documentation.

The eth_sign method calculates an Ethereum specific signature. Note that this method requires the node to have access to the account's private key, which is not available on shared infrastructure.

Parameters

Parameter

Type

Required

Description

address

string

Yes

20-byte account address to sign with

message

string

Yes

Data to sign in hexadecimal

Request

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": ["0xe7e2cb8c81c10ff191a73fe266788c9ce62ec754", "0xdeadbeaf"],
    "id": "getblock.io"
}'

request.js

import axios from 'axios';

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

const payload = {
    jsonrpc: '2.0',
    method: 'eth_sign',
    params: ["0xe7e2cb8c81c10ff191a73fe266788c9ce62ec754", "0xdeadbeaf"],
    id: 'getblock.io'
};

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

request.py

import requests

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

payload = {
    "jsonrpc": "2.0",
    "method": "eth_sign",
    "params": ["0xe7e2cb8c81c10ff191a73fe266788c9ce62ec754", "0xdeadbeaf"],
    "id": "getblock.io"
}

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

main.rs

use reqwest::header;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = reqwest::Client::new();
    
    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header(header::CONTENT_TYPE, "application/json")
        .body(r#"{
            "jsonrpc": "2.0",
            "method": "eth_sign",
            "params": ["0xe7e2cb8c81c10ff191a73fe266788c9ce62ec754", "0xdeadbeaf"],
            "id": "getblock.io"
        }"#)
        .send()
        .await?;
    
    println!("{}", response.text().await?);
    Ok(())
}

Response

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

Response Parameters

Field

Type

Description

jsonrpc

string

JSON-RPC version (2.0)

string

Request identifier

result

varies

Signature on success, or error on shared nodes

Use Case

The eth_sign method is useful for:

Local node usage
Development testing

Error Handling

Status Code

Error Message

Cause

403

Forbidden

Missing or invalid ACCESS-TOKEN

-32600

Invalid Request

Malformed request body

-32602

Invalid params

Invalid method parameters

Web3 Integration

ethers.js

import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider('https://go.getblock.io/<ACCESS-TOKEN>/');

const result = await provider.send('eth_sign', ["0xe7e2cb8c81c10ff191a73fe266788c9ce62ec754", "0xdeadbeaf"]);
console.log('Result:', result);

viem.js

import { createPublicClient, http } from 'viem';
import { polygon } from 'viem/chains';

const client = createPublicClient({
    chain: polygon,
    transport: http('https://go.getblock.io/<ACCESS-TOKEN>/')
});

const result = await client.request({
    method: 'eth_sign',
    params: ["0xe7e2cb8c81c10ff191a73fe266788c9ce62ec754", "0xdeadbeaf"]
});
console.log('Result:', result);

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