BNB Smart Chain

BNB Smart Chain

Block Confirmations Guide

Block confirmations are crucial for ensuring transaction finality in Ethereum. This guide explains how confirmations work and how to implement them in your applications.

Understanding Confirmations

• What are block confirmations
• Why confirmations matter
• Recommended confirmation counts
• Finality in different networks (mainnet vs testnets)

Implementation Examples

1// Check number of confirmations
2const getConfirmations = async (txHash) => {
3	const tx = await web3.eth.getTransaction(txHash);
4	const currentBlock = await web3.eth.getBlockNumber();
5	return tx.blockNumber ? currentBlock - tx.blockNumber : 0;
6};
7 
8// Wait for specific number of confirmations
9const waitForConfirmations = async (txHash, confirmations = 6) => {
10	while ((await getConfirmations(txHash)) < confirmations) {
11		await new Promise((resolve) => setTimeout(resolve, 1000));
12	}
13	return true;
14};

Security Considerations

1. Different confirmation requirements for different transaction values
2. Handling chain reorganizations
3. Network-specific considerations
4. Monitoring confirmation progress

See also

• eth_getTransactionReceipt - Get transaction confirmation status
• Working with Blocks - General block handling
• Chain Reorganization Guide - Handling blockchain reorganizations