Transaction ID (TXID)

What is a Transaction ID?

A Transaction ID (TXID), also known as a transaction hash, is a unique identification number assigned to a specific transaction on the blockchain. It is a distinctive alphanumeric string that can be verified and added to the blockchain.

Every transaction added to the blockchain receives an individual TXID. This identifier is generated by applying a hash function to the transaction data, including the sender's address, recipient's address, and the amount of cryptocurrency being transferred.

On most blockchains, you can view any transaction in a block explorer by searching for its TXID. Transaction IDs are valuable tools for verifying transactions, retrieving transaction details, and troubleshooting transaction-related issues.

Examples of TXIDs

The First Bitcoin Transaction

The following is the TXID of the very first Bitcoin transaction, sent by Satoshi Nakamoto to Hal Finney:

F4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16

The Bitcoin Pizza Transaction

This is the TXID of the famous Bitcoin pizza transaction:

Cca7507897abc89628f450e8b1e0c6fca4ec3f7b34cccf55f3f531c659ff4d79

Bitcoin uses the SHA-256 (Secure Hash Algorithm 256-Bit) cryptographic hash function to generate TXIDs. This function takes transaction data as input and produces a 256-bit hash, which is represented as a 64-character hexadecimal number.

You can locate these transactions yourself by copying the TXID into a Bitcoin block explorer such as blockchain.com or blockchair.com.

Where to Find Your TXIDs

TXIDs are accessible through blockchain explorers, where all associated transaction details are publicly visible. This means that anyone can retrieve all information related to a specific transaction or address. While the identity of the sender or recipient is not directly disclosed, it is possible that this information could potentially be determined through other means.

Finding TXIDs on Centralized Exchanges

When you withdraw cryptocurrency from a centralized exchange (CEX), the platform displays the TXID of your withdrawal transaction. On major centralized exchanges, you can find this information in your transaction history. When you click on the TXID for a specific withdrawal, you will be directed to the corresponding transaction in the blockchain's block explorer.

If you have accidentally sent funds to an incorrect address or blockchain, the TXID in your withdrawal history is essential for verifying whether you can recover your funds. However, recovery cannot be guaranteed in all cases. It is advisable to contact the customer support team of the platform to which you transferred the funds for further assistance.

FAQ

What is Transaction ID (TXID)? What is its function?

Transaction ID (TXID) is a unique identifier for blockchain transactions. It tracks and verifies transaction existence and status on the network, serving as a reference code for confirming transaction details.

How to query and track a blockchain transaction TXID?

Find your TXID in your wallet transaction history. Use a blockchain explorer like Blockchain.com or Etherscan.io. Enter the TXID to view transaction details including amount, date, addresses, and confirmation status.

What is the difference between TXID and wallet address?

TXID is a unique identifier for a specific transaction, while a wallet address identifies the sender or receiver of funds. TXID tracks transactions, whereas wallet address identifies users.

Why is my transaction showing a TXID but hasn't been confirmed yet?

Your transaction showing a TXID means it has been broadcast to the network but is awaiting confirmation. Confirmation requires time as the network processes blocks. Network congestion or lower gas fees may slow confirmation. Wait for the required block confirmations for your blockchain.

How to verify if a TXID is valid and authentic?

Use a blockchain explorer to search the TXID. If it appears on the blockchain with transaction details, sender, receiver, and amount, it is valid and authentic. If not found, the TXID is invalid or fake.