Developer Code Snippets & RPC Scripts

import asyncio
import json
from web3 import AsyncWeb3, WebSocketProvider

RPC_WS_URL = "wss://eth-mainnet.g.alchemy.com/v2/YOUR_API_KEY"

async def stream_mempool():
    async with AsyncWeb3(WebSocketProvider(RPC_WS_URL)) as w3:
        if await w3.is_connected():
            print("[+] Connected to EVM Node Mempool Feed...")
            
            # Subscribe to new pending transactions
            subscription_id = await w3.eth.subscribe("newPendingTransactions")
            
            async for payload in w3.socket.process_subscriptions():
                tx_hash = payload["result"]
                print(f"[0-CONF PENDING] TxHash: {tx_hash}")
                # Fetch full raw transaction for inspection
                try:
                    tx = await w3.eth.get_transaction(tx_hash)
                    if tx and tx.get("to") and tx["to"].lower() == "0xdac17f958d2ee523a2206206994597c13d831ec7":
                        print(f"[*] Alert: USDT Transfer Detected in Mempool -> Nonce: {tx['nonce']}")
                except Exception as e:
                    pass

if __name__ == "__main__":
    asyncio.run(stream_mempool())

import { TronWeb } from 'tronweb';

const tronWeb = new TronWeb({
  fullHost: 'https://api.trongrid.io',
  headers: { 'TRON-PRO-API-KEY': 'YOUR_TRONGRID_KEY' },
  privateKey: 'YOUR_SIMULATION_PRIVATE_KEY'
});

async function broadcastTRC20(recipientAddress, amountUSDT) {
  const USDT_CONTRACT = 'TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t';
  const decimals = 6;
  const amountSun = amountUSDT * Math.pow(10, decimals);

  try {
    const contract = await tronWeb.contract().at(USDT_CONTRACT);
    
    // Set 50 TRX fee limit for Energy consumption
    const transaction = await contract.transfer(recipientAddress, amountSun).send({
      feeLimit: 50_000_000,
      callValue: 0
    });

    console.log('[+] Broadcast Success! Tronscan Pending Hash:', transaction);
    return transaction;
  } catch (error) {
    console.error('[-] Broadcast Error:', error);
  }
}

// Example Execution
broadcastTRC20('TNPeeaaTK7K93nT5YoH45xH86T2rNXo...', 100);

package main

import (
	"context"
	"fmt"
	"log"
	"math/big"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/ethclient"
)

func main() {
	client, err := ethclient.Dial("https://cloudflare-eth.com")
	if err != nil {
		log.Fatalf("Failed to connect to node: %v", err)
	}
	defer client.Close()

	address := common.HexToAddress("0xd8da6bf26964af9d7eed9e03e53415d37aa96045")
	
	// Query current mined nonce vs pending mempool nonce
	minedNonce, err := client.NonceAt(context.Background(), address, nil)
	pendingNonce, err := client.PendingNonceAt(context.Background(), address)

	fmt.Printf("Mined Nonce: %d | Pending Mempool Nonce: %d\n", minedNonce, pendingNonce)

	if pendingNonce > minedNonce {
		fmt.Println("[!] Anomaly Alert: Unconfirmed transaction(s) queued in mempool!")
	}
}

use alloy_primitives::{address, U256, Bytes};

fn encode_erc20_transfer(to: &str, amount_usdt: u64) -> Bytes {
    let method_id = hex::decode("a9059cbb").unwrap();
    let recipient = address!(to);
    let amount = U256::from(amount_usdt * 1_000_000); // 6 Decimals

    let mut payload = Vec::with_capacity(68);
    payload.extend_from_slice(&method_id);
    payload.extend_from_slice(&[0u8; 12]); // Left pad 12 zeros for 32-byte word
    payload.extend_from_slice(recipient.as_slice());
    payload.extend_from_slice(&amount.to_be_bytes::<32>());

    Bytes::from(payload)
}

fn main() {
    let raw_payload = encode_erc20_transfer("d8da6bf26964af9d7eed9e03e53415d37aa96045", 1000);
    println!("Serialized Raw Hex: 0x{}", hex::encode(raw_payload));
}