Transaction ID (TXID)
The unique identifier of a transaction, typically the double SHA-256 hash of its serialized data.
- Type
- blockchaintechnical
- Also known as
- Tx HashTransaction Hash
The TXID is computed from the serialized transaction data. Malleability fixes (SegWit on BTC) reduce cases where IDs change. Users reference TXIDs to track confirmations in block explorers.
"After broadcasting, Bob shared the TXID so the merchant could monitor confirmations in a block explorer."
Related Terms
Transaction
→The fundamental unit of data exchange on a blockchain, representing transfers of cryptocurrency or executions of smart contracts.
SHA-256
→A cryptographic hash function used extensively in cryptocurrencies like Bitcoin (BTC) and Bitcoin Cash (BCH).
Block Explorer
→A website or tool for viewing blockchain data like transactions, addresses, and blocks.
All terms and definitions may update as the Cryptionary improves.
