eth_getCode - BSC

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

This method returns the bytecode stored at a given address on the BNB Smart Chain. This is useful for verifying contract deployments, distinguishing between EOAs and contracts, and analyzing smart contract code.

Parameters

Parameter

Type

Required

Description

address

string

Yes

Contract address to query

blockNumber

string

Yes

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

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_getCode",
    "params": ["0x55d398326f99059fF775485246999027B3197955", "latest"],
    "id": "getblock.io"
}'

request.js

const axios = require('axios');

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

// USDT contract on BSC
const payload = {
    jsonrpc: '2.0',
    method: 'eth_getCode',
    params: ['0x55d398326f99059fF775485246999027B3197955', 'latest'],
    id: 'getblock.io'
};

axios.post(url, payload, {
    headers: { 'Content-Type': 'application/json' }
})
.then(response => {
    const code = response.data.result;
    console.log('Is Contract:', code !== '0x');
    console.log('Code Length:', (code.length - 2) / 2, 'bytes');
})
.catch(error => console.error(error));

request.py

import requests

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

payload = {
    "jsonrpc": "2.0",
    "method": "eth_getCode",
    "params": ["0x55d398326f99059fF775485246999027B3197955", "latest"],
    "id": "getblock.io"
}

response = requests.post(url, headers={"Content-Type": "application/json"}, json=payload)
code = response.json()["result"]
print(f"Is Contract: {code != '0x'}")

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_getCode",
        "params": ["0x55d398326f99059fF775485246999027B3197955", "latest"],
        "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",
    "result": "0x608060405234801561001057600080fd5b50600436106100..."
}

Response Parameters

Parameter

Type

Description

result

string

Bytecode (0x if EOA, actual bytecode if contract)

Use Cases

Verify contract deployment on BSC
Distinguish contracts from EOAs
Analyze BEP-20 token contracts
Validate proxy implementations
Security auditing

Error Handling

Error Code

Description

-32602

Invalid params - malformed address

-32603

Internal error

SDK Integration

ethers.js

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

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

const code = await provider.getCode('0x55d398326f99059fF775485246999027B3197955');
console.log('Is Contract:', code !== '0x');

viem.js

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

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

const code = await client.getCode({
    address: '0x55d398326f99059fF775485246999027B3197955'
});
console.log('Is Contract:', code !== undefined && code !== '0x');

Previouseth_getUncleByBlockHashAndIndex - BSC Nexteth_estimateGas - BSC

Last updated 12 days ago

Was this helpful?

hashtagParameters

hashtagRequest Example

hashtagResponse Example

hashtagResponse Parameters

hashtagUse Cases

hashtagError Handling

hashtagSDK Integration

Parameters

Request Example

Response Example

Response Parameters

Use Cases

Error Handling

SDK Integration