Term
Transaction hash (txid)
A transaction hash (also called txid or tx hash) is the unique cryptographic fingerprint of a specific blockchain transaction — a 64-character hexadecimal string used to look up and reference that exact transaction on a block explorer.
A transaction hash is a unique 32-byte identifier (typically shown as a 64-character hex string) that identifies a specific transaction on a blockchain. It is computed by hashing the transaction data itself, which means the hash changes if any part of the transaction changes. If two people send otherwise identical transactions, they will have different hashes because of differences in nonces, timestamps, or signatures.
The main practical use of a transaction hash is looking up a transaction on a block explorer — pasting the hash into mempool.space, Etherscan, Tronscan, or the equivalent takes you directly to that transaction's page, where you can see confirmation count, fee paid, addresses involved, and any smart-contract interactions.
When you send a swap deposit, your wallet will show a transaction hash immediately after signing. Keep it — you'll need it if you have to check status, contact support, or resolve any dispute about whether a deposit was made.
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