What is a transaction hash (TXID)?

A transaction ID (TXID) is an identifier used to look up a particular blockchain transaction. Wallets may call it a “transaction hash” or “tx hash.” It is derived from transaction data and provides a reference for finding the record in a block explorer.

Transaction hash vs. wallet address

Example

A wallet address identifies a sending or receiving destination; a TXID identifies the transaction. Two separate transfers to the same address have separate transaction IDs. Searching the address brings up its activity, while searching a TXID opens a particular transaction.

An exchange withdrawal request number is not necessarily a transaction hash. It may be an internal reference for a request that has not reached the network. Keep these fields separate when support asks for the onchain transaction ID.

Does a TXID prove that a payment is complete?

No. On Ethereum, for example, the hash is generated before the transaction enters a block. The record may still be pending or may show a failure. To assess completion, check the correct network, recipient, amount and confirmation or execution status together.

After locating the ID, the TXID transaction-tracking guide explains how to check status, recipient and amount.

A TXID is not a private key and does not grant spending authority on its own. Sharing it can expose the public addresses and amounts associated with the transaction, so consider the privacy implications.