August 2019
Intermediate to advanced
486 pages
13h 52m
English
Content preview from Mastering Blockchain Programming with Solidity
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Transaction hash
A user doesn't have to set the transaction hash field. A transaction hash is assigned to every transaction when it contains valid transaction fields and is broadcast to the Ethereum blockchain. The transaction ID is the SHA-256 hash of the signed transaction data. Using this transaction ID, we can track the status of the transaction and can cancel or drop the transaction before it gets executed.