eth_getCode - Mantle

Example code for the eth_getCode JSON-RPC method. Complete guide on how to use eth_getCode JSON-RPC in GetBlock Web3 documentation.

This method returns code at a given address on the Mantle network.

Parameters

Parameter

Type

Description

address

string

20-byte contract address

blockParameter

string

Block number in hex, or "latest", "earliest", "pending"

Request

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_getCode",
    "params": ["0x201EBa5CC46D216Ce6DC03F6a759e8E766e956aE", "latest"],
    "id": "getblock.io"
}'

import axios from 'axios';

const data = JSON.stringify({
    "jsonrpc": "2.0",
    "method": "eth_getCode",
    "params": ["0x201EBa5CC46D216Ce6DC03F6a759e8E766e956aE", "latest"],
    "id": "getblock.io"
});

const config = {
    method: 'post',
    url: 'https://go.getblock.io/<ACCESS-TOKEN>/',
    headers: {
        'Content-Type': 'application/json'
    },
    data: data
};

axios(config)
    .then(response => console.log(JSON.stringify(response.data)))
    .catch(error => console.log(error));

import requests
import json

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

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "eth_getCode",
    "params": ["0x201EBa5CC46D216Ce6DC03F6a759e8E766e956aE", "latest"],
    "id": "getblock.io"
})

headers = {
    'Content-Type': 'application/json'
}

response = requests.post(url, headers=headers, data=payload)
print(response.text)

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_getCode",
            "params": ["0x201EBa5CC46D216Ce6DC03F6a759e8E766e956aE", "latest"],
            "id": "getblock.io"
        }"#)
        .send()
        .await?;
    
    println!("{}", response.text().await?);
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x608060405234801561001057600080fd5b50..."
}

Response Parameters

Field

Type

Description

jsonrpc

string

JSON-RPC protocol version ("2.0")

string

Request identifier matching the request

result

string

Contract bytecode (hex), or "0x" if no code

Use Case

The eth_getCode method is essential for:

Contract verification
Checking if address is a contract
Smart contract analysis
Security auditing
Contract deployment verification
Distinguishing EOA from contracts

Error Handling

Status Code

Error Message

Cause

403

Forbidden

Missing or invalid ACCESS-TOKEN

-32602

Invalid params

Invalid address format

Web3 Integration

import { ethers } from 'ethers';

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

const code = await provider.getCode('0x201EBa5CC46D216Ce6DC03F6a759e8E766e956aE');
console.log('Contract code:', code);

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

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

const code = await client.getCode({
    address: '0x201EBa5CC46D216Ce6DC03F6a759e8E766e956aE'
});
console.log('Contract code:', code);

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