eth_getCode - Tron

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

This method returns the deployed bytecode at an address. An account with no contract returns 0x, while a TVM contract returns its runtime bytecode.

Parameters

Parameter	Type	Required	Description
address	string	Yes	Contract address in hex (0x41...) form
block	string	Yes	Block number in hex, or "latest", "earliest", "pending"

Request

cURL

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/jsonrpc' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_getCode",
    "params": ["0x41a614f803b6fd780986a42c78ec9c7f77e6ded13c", "latest"],
    "id": "getblock.io"
}'

Axios

example.js

const axios = require('axios');

const response = await axios.post('https://go.getblock.io/<ACCESS-TOKEN>/jsonrpc', {
    jsonrpc: '2.0',
    method: 'eth_getCode',
    params: ["0x41a614f803b6fd780986a42c78ec9c7f77e6ded13c", "latest"],
    id: 'getblock.io'
}, {
    headers: { 'Content-Type': 'application/json' }
});

console.log(response.data.result);

Request

example.py

import requests

response = requests.post(
    'https://go.getblock.io/<ACCESS-TOKEN>/jsonrpc',
    headers={'Content-Type': 'application/json'},
    json={
        'jsonrpc': '2.0',
        'method': 'eth_getCode',
        'params': ["0x41a614f803b6fd780986a42c78ec9c7f77e6ded13c", "latest"],
        'id': 'getblock.io'
    }
)

print(response.json())

Rust

example.rs

use reqwest::Client;
use serde_json::{json, Value};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();

    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/jsonrpc")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "eth_getCode",
            "params": ["0x41a614f803b6fd780986a42c78ec9c7f77e6ded13c", "latest"],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;

    println!("Result: {}", response["result"]);
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x60806040526004361061..."
}

Response Parameters

Parameter	Type	Description
jsonrpc	string	JSON-RPC protocol version ("2.0")
id	string	Request identifier matching the request
result	string	Hex-encoded runtime bytecode, or 0x for a non-contract account

Use Cases

• Contract Detection: Distinguish a contract from a plain account

• Bytecode Verification: Compare deployed bytecode against an artifact

• Security Analysis: Retrieve bytecode for static analysis

• Compatibility: Read TVM bytecode from EVM-oriented tools

Error Handling

Error Code	Message	Description
-32602	Invalid params	A parameter is missing or has the wrong type or format
-32603	Internal error	The node failed to process the request