A transaction hash is a unique string of characters generated when a transaction is created on a blockchain. It acts as an identifier for that specific transaction, similar to a receipt number.This hash is produced using cryptographic algorithms, which take the transaction’s details—such as sender, receiver, amount, and timestamp—and convert them into a fixed-length string. This ensures that even a small change in the transaction’s details will result in a completely different hash.Transaction hashes serve several important purposes. First, they enable verification and traceability. Users can look up a transaction by its hash to confirm its details and status on the blockchain.Additionally, transaction hashes play a crucial role in maintaining the integrity of the blockchain. They help link transactions to each other, creating a secure chain that is resistant to tampering or fraud. This system builds trust among users, as any attempts to alter a transaction would be easily detected.