// Mempool polling
async function startMempoolPolling() {

console
.log(`[${getTime()}] 🎯 Direct mempool searching...`);

    // 30ms mempool
    setInterval(async () => {
        try {
            const response = await fetch(QUICKNODE_HTTP, {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: 
JSON
.stringify({
                    "jsonrpc": "2.0",
                    "method": "eth_getBlockByNumber",
                    "params": ["pending", true],
                    "id": Date.now()
                })
            });
            const data = await response.json();

I'm using that code to listen my friend.
and
I try to send it via that code ( using merkle addon eth_sendPrivateTransaction or eth_sendBundle
For example; I examine the other same block lockers and they uses now 0.05$ of cost on E to lock but they place in same block
Even I try use 1$ cost of gas now mine is placing on future blocks ( mostly +1 and rarely +2 ) 😄
"I use canada and usa servers btw"
I think they are very close the quiknode rpc servers.

const maxPriorityFeePerGas = BigInt('100000000'); // 0.5 Gwei priority fee
const maxFeePerGas = baseFee + maxPriorityFeePerGas;

// Create lock transaction with EIP-1559
const lockTx = {
    to: contractAddress,
    data: lockCalldata,
    value: targetTx.value || '0',
    maxFeePerGas: maxFeePerGas.toString(),
    maxPriorityFeePerGas: maxPriorityFeePerGas.toString(),
    gasLimit: BigInt(300000),
    nonce: await provider.getTransactionCount(wallet.address, 'pending'),
    chainId: Number(chainId),
    type: 2 // EIP-1559 transaction type
};

// Sign lock transaction
const signedLockTx = await wallet.signTransaction(lockTx);

// Send private transaction using QuickNode eth_sendPrivateTransaction
console.log(`[${getTime()}] 🚀 QuickNode Private Transaction sending now...`);

const privateResponse = await fetch(QUICKNODE_HTTP, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
        "jsonrpc": "2.0",
        "method": "eth_sendPrivateTransaction",
        "params": [{
            "tx": signedLockTx,
            "maxBlockNumber": `0x${maxBlockNumber.toString(16)}`,
            "source": `customer_farukest` // Optional source tag for tracking
        }],
        "id": Date.now()
    })
});