Struct subcoin_script::TransactionSignatureChecker

pub struct TransactionSignatureChecker<'a> { /* private fields */ }

A SignatureChecker implementation for transactions.

Implementations

impl<'a> TransactionSignatureChecker<'a>

pub fn new(tx: &'a Transaction, input_index: usize, input_amount: u64) -> Self

Constructs a new instance of TransactionSignatureChecker.

Trait Implementations

impl SignatureChecker for TransactionSignatureChecker<'_>

fn check_lock_time(&self, lock_time: ScriptNum) -> bool

This function verifies that the transaction’s nLockTime field meets the conditions specified by the lock_time parameter.

The lock_time can represent either a block height or a Unix timestamp, depending on its value:

• If lock_time < 500,000,000, it is interpreted as a block height.
• If lock_time >= 500,000,000, it is interpreted as a Unix timestamp.

The lock is satisfied if:

1. The lock_time is of the same type (block height or timestamp) as the transaction’s nLockTime.
2. The lock_time is less than or equal to the transaction’s nLockTime.
3. The transaction’s nSequence field for the input is not set to the maximum value (0xFFFFFFFF), which would disable the time lock.

Arguments

• lock_time - The absolute time lock to check, represented as a [ScriptNum].

Returns

• true if the absolute time lock is satisfied.
• false otherwise.

fn check_sequence(&self, sequence: ScriptNum) -> bool

The lock is satisfied if:

1. The transaction’s version is at least 2 (BIP 68).
2. The sequence is of the same type (blocks or seconds) as the input’s nSequence.
3. The sequence is less than or equal to the input’s nSequence.

Arguments

• sequence - The relative time lock to check, represented as a [ScriptNum].

Returns

• true if the relative time lock is satisfied.
• false otherwise.

fn check_ecdsa_signature( &mut self, sig: &EcdsaSignature, pk: &PublicKey, script_pubkey: &Script, sig_version: SigVersion, ) -> Result<bool, SignatureError>

Checks an ECDSA signature in the context of a Bitcoin transaction.

fn check_schnorr_signature( &mut self, sig: &SchnorrSignature, pk: &XOnlyPublicKey, sig_version: SigVersion, exec_data: &ScriptExecutionData, ) -> Result<bool, SignatureError>

Checks a Schnorr signature in the context of a Bitcoin transaction.

fn verify_ecdsa_signature( &self, sig: &EcdsaSignature, msg: &Message, pk: &PublicKey, ) -> bool

Verifies an ECDSA signature against a message and public key.

fn verify_schnorr_signature( &self, sig: &SchnorrSignature, msg: &Message, pk: &XOnlyPublicKey, ) -> bool

Verifies a Schnorr signature against a message and public key.