eth_getCode - SEI

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

Returns the compiled bytecode of a smart contract at the specified address on the Sei network. Returns 0x for externally owned accounts (EOAs).

Parameters

Parameter

Type

Description

address

string

The address of the smart contract

block

string

Block number in hex, or latest, earliest, pending, safe, finalized

Request

curl --location 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data '{
    "jsonrpc": "2.0",
    "method": "eth_getCode",
    "params": ["0x1234567890abcdef1234567890abcdef12345678", "latest"],
    "id": "getblock.io"
}'

example.js

import axios from 'axios';

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

const payload = {
    jsonrpc: '2.0',
    method: 'eth_getCode',
    params: ["0x1234567890abcdef1234567890abcdef12345678", "latest"],
    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
import json

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

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "eth_getCode",
    "params": ["0x1234567890abcdef1234567890abcdef12345678", "latest"],
    "id": "getblock.io"
})

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

response = requests.post(url, headers=headers, data=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 response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "eth_getCode",
            "params": ["0x1234567890abcdef1234567890abcdef12345678", "latest"],
            "id": "getblock.io"
        }))
        .send()
        .await?;
    
    let result: serde_json::Value = response.json().await?;
    println!("{:#?}", result);
    
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x606060405236..."
}

Response Parameters

Field

Type

Description

result

string

The bytecode of the contract, or 0x if no code exists

Use Case

The eth_getCode method is essential for:

Blockchain developers building applications on Sei
Wallet applications requiring network data
Analytics platforms tracking Sei network activity
DeFi protocols integrating with Sei's parallelized EVM

Error Handling

Common errors when using this method:

Error Code

Message

Description

-32700

Parse error

Invalid JSON

-32600

Invalid Request

JSON is not a valid request object

-32601

Method not found

Method does not exist

-32602

Invalid params

Invalid method parameters

-32603

Internal error

Internal JSON-RPC error

-32000

Invalid input

Generic input error

-32500

Cross-VM error

Error in cross-VM operation (Sei-specific)

Web3 Integration

import { ethers } from 'ethers';

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

// Using ethers provider methods
const result = await provider.send('eth_getCode', ["0x1234567890abcdef1234567890abcdef12345678", "latest"]);
console.log(result);

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

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

// Using viem's request method
const result = await client.request({
    method: 'eth_getCode',
    params: ["0x1234567890abcdef1234567890abcdef12345678", "latest"]
});
console.log(result);

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