eth_getTransactionCount - Somnia

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

This method returns the number of transactions sent from an address (the nonce) on the Somnia network. This is critical for transaction construction, as each transaction must have the correct nonce to be valid. With Somnia's high throughput, nonce management is important for rapid transaction submission.

Parameters

Parameter

Type

Required

Description

address

string

Yes

The address to get nonce for

blockNumber

string

Yes

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

Request Example

curl

curl -X POST https://go.getblock.io/<ACCESS-TOKEN>/ \
-H "Content-Type: application/json" \
-d '{
  "jsonrpc": "2.0",
  "id": "getblock.io",
  "method": "eth_getTransactionCount",
  "params": [
    "0x742d35Cc6634C0532925a3b844Bc9e7595f8bB45",
    "latest"
  ]
}'

request.js

const axios = require('axios');

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

const payload = {
  jsonrpc: '2.0',
  id: 'getblock.io',
  method: 'eth_getTransactionCount',
  params: ['0x742d35Cc6634C0532925a3b844Bc9e7595f8bB45', 'latest']
};

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

request.py

import requests
import json

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

payload = {
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "method": "eth_getTransactionCount",
    "params": ["0x742d35Cc6634C0532925a3b844Bc9e7595f8bB45", "latest"]
}

response = requests.post(url, headers={"Content-Type": "application/json"}, json=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 payload = json!({
        "jsonrpc": "2.0",
        "id": "getblock.io",
        "method": "eth_getTransactionCount",
        "params": ["0x742d35Cc6634C0532925a3b844Bc9e7595f8bB45", "latest"]
    });

    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": "0x15"
}

Response Parameters

Parameter

Type

Description

result

string

Nonce in hex (0x15 = 21 transactions sent)

Use Cases

Get nonce for transaction signing
Track account activity
Detect transaction count gaps
Manage transaction queues
Build transaction batching systems

Error Handling

Error Code

Description

-32602

Invalid params - malformed address

-32603

Internal error - node processing issues

SDK Integration

ethers.js

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

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

const nonce = await provider.getTransactionCount('0x742d35Cc6634C0532925a3b844Bc9e7595f8bB45');
console.log(nonce);

viem.js

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

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

const nonce = await client.getTransactionCount({
  address: '0x742d35Cc6634C0532925a3b844Bc9e7595f8bB45'
});
console.log(nonce);

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