eth_chainId - Somnia

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

This method returns the chain ID of the Somnia network. The chain ID is used to prevent replay attacks across different EVM networks. Somnia Mainnet uses chain ID 5031, while the Shannon Testnet uses 50312. This value is essential for transaction signing and network identification.

Parameters

None

Returns

Field

Type

Description

result

string

The chain ID as a hexadecimal string

Request Example

curl -X POST https://go.getblock.io/<ACCESS-TOKEN>/ \
-H "Content-Type: application/json" \
-d '{
  "jsonrpc": "2.0",
  "id": "getblock.io",
  "method": "eth_chainId",
  "params": []
}'

const axios = require('axios');

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

const payload = {
  jsonrpc: '2.0',
  id: 'getblock.io',
  method: 'eth_chainId',
  params: []
};

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

import requests
import json

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

payload = {
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "method": "eth_chainId",
    "params": []
}

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

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",
        "id": "getblock.io",
        "method": "eth_chainId",
        "params": []
    });

    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

{
  "jsonrpc": "2.0",
  "id": "getblock.io",
  "result": "0x13a7"
}

Response Parameters

Parameter

Type

Description

result

string

Chain ID in hex (0x13a7 = 5031 for Mainnet)

Use Cases

Verify connection to correct network
Include in transaction signing for replay protection
Validate RPC endpoint configuration
Network detection in multi-chain applications
Wallet network switching

Error Handling

Error Code

Description

-32603

Internal error - node processing issues

-32000

Server error - RPC endpoint unavailable

SDK Integration

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

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

const network = await provider.getNetwork();
console.log(network.chainId); // 5031n for Mainnet

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

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

const chainId = await client.getChainId();
console.log(chainId); // 5031 for Mainnet

Previouseth_blockNumber - Somnia Nexteth_call - Somnia

Last updated 7 hours ago

Was this helpful?

hashtagParameters

hashtagReturns

hashtagRequest Example

hashtagResponse Example

hashtagResponse Parameters

hashtagUse Cases

hashtagError Handling

hashtagSDK Integration

Parameters

Returns

Request Example

Response Example

Response Parameters

Use Cases

Error Handling

SDK Integration