_The Problem:

User connects a wallet (Phantom) successfully User signs a transaction (I get the wallet popup and signature) Transaction is sent (I get a transaction ID) Transaction fails to confirm with "Transaction confirmation timeout - not found on chain" When checking the explorer, the transaction is "not found" This happens consistently, even with different transaction amounts and recipient addresses.

My Environment:

Solana devnet @solana/web3.js v1.98.0 @solana/wallet-adapter-react Phantom wallet Here's my transaction sending code:

// Get latest blockhash with context - using PROCESSED for fastest blockhash const { context: { slot: minContextSlot }, value: { blockhash, lastValidBlockHeight } } = await connection.getLatestBlockhashAndContext('processed');

// Create transaction with priority fee const transaction = new Transaction({ feePayer: publicKey, recentBlockhash: blockhash, });

// Add priority fee instruction transaction.add( ComputeBudgetProgram.setComputeUnitPrice({ microLamports: 100000 // 0.0001 SOL priority fee }) );

// Add transfer instruction transaction.add( SystemProgram.transfer({ fromPubkey: publicKey, toPubkey: recipientPubkey, lamports: amount * LAMPORTS_PER_SOL }) );

// Send transaction with consistent commitment const txSignature = await sendTransaction(transaction, connection, { minContextSlot, skipPreflight: false, preflightCommitment: 'processed', // Match the blockhash commitment maxRetries: 5 });

// Transaction sent! Now confirm it...

And here's my confirmation code:

// Wait for confirmation with timeout const waitForConfirmation = async (txSignature, blockhash, lastValidBlockHeight) => { try { // Method 1: Use confirmTransaction const confirmationPromise = connection.confirmTransaction({ signature: txSignature, blockhash: blockhash, lastValidBlockHeight: lastValidBlockHeight }, 'confirmed');

  // Method 2: Poll for status
  const statusCheckPromise = new Promise((resolve, reject) => {
    let retries = 0;
    const maxRetries = 30;

    const checkStatus = async () => {
      try {
        // Check if block height has been exceeded
        const currentBlockHeight = await

connection.getBlockHeight('confirmed'); if (currentBlockHeight > lastValidBlockHeight) { reject(new Error(Transaction expired: block height exceeded)); return; }

        const status = await connection.getSignatureStatus(txSignature);
        if (status && status.value) {
          if (status.value.confirmationStatus === 'confirmed' ||
              status.value.confirmationStatus === 'finalized') {
            resolve(status);
            return;
          }
        }

        retries++;
        if (retries >= maxRetries) {
          reject(new Error('Transaction confirmation timeout - not found

on chain')); return; }

        // Continue polling
        setTimeout(checkStatus, 1000);
      } catch (error) {
        setTimeout(checkStatus, 1000);
      }
    };

    checkStatus();
  });

  // Race both methods
  const result = await Promise.race([confirmationPromise,

statusCheckPromise]);

  // Verify transaction is really on chain
  const txStatus = await connection.getTransaction(txSignature, {
    commitment: 'confirmed',
  });

  if (!txStatus) {
    const status = await connection.getSignatureStatus(txSignature);
    if (!status || !status.value || !status.value.confirmationStatus) {
      throw new Error('Transaction not found on chain');
    }
  }

  return result;
} catch (error) {
  throw error;
}

}; I've tried many approaches:

Increased priority fees Different commitment levels ('processed', 'confirmed') Changed blockhash fetching strategies Added proper error handling and retries I also see this in my logs: Got blockhash: ABCDE12345... (valid until block 352651718) Current block height: 352651568 Added priority fee: 100000 microlamports Transaction sent: 5g7upHabZCYUjUUmuXATXbt1aMHCqzujvTEqq6WQymD7bcxzkWCE14zW KFfGAM2TWoSL8Km11mY8L1nhCZ8vGcen

Is there something wrong with my approach? Why would the transaction signature be valid but the transaction never shows up on-chain?

javascriptreactjsblockchainweb3jssolana Share Edit Follow asked 2 days ago Guy Fernando's user avatar Guy Fernando 1122 bronze badges New contributor Add a comment Related questions 3 Best practice of sending multiple dependent transaction [solana] [web3js] 9 Blockhash not found when sending transaction 4 Solana transaction not confirmed Load 4 more related questions Know someone who can answer? Share a link to this question via email, Twitter, or Facebook. Your Answer