PrecomputedTransactionData

Cached per-transaction data that speeds up repeated script verification — most importantly, the BIP-341 sighash components a taproot spend uses (hashPrevouts, hashAmounts, hashScriptPubkeys, hashSequences, hashOutputs) that would otherwise be recomputed for every input.

final class PrecomputedTransactionData

Overview

Construct once per transaction, then reuse across every verify(amount:transaction:precomputedData:inputIndex:flags:) call for that transaction. For non-taproot verification the spentOutputs argument is optional; for taproot it is required.

Wraps the opaque btck_PrecomputedTransactionData type; deinit calls btck_precomputed_transaction_data_destroy when the last Swift reference drops.

Topics

Initializers

init(transaction: Transaction, spentOutputs: [TransactionOutput]?) throws
Creates precomputed data for script verification.