Verifies that a PCZT matches the original transaction request before signing. Important security check when the PCZT was handled by a third party.
Signature
function verify_before_signing(
pczt: WasmPczt,
payments: WasmPayment[],
expected_change: WasmExpectedTxOut[]
): void // Throws on failure
func VerifyBeforeSigning(
pczt *Pczt,
payments []Payment,
expectedChange []ExpectedTxOut,
) error
fun verifyBeforeSigning(
pczt: Pczt,
payments: List<Payment>,
expectedChange: List<ExpectedTxOut>
) // Throws on failure
Parameters
Original payments (same as passed to propose_transaction)
Example
// Get actual change from PCZT
const info = t2z.inspect_pczt(pczt.to_hex());
const paymentTotal = payments.reduce((sum, p) => sum + p.amount, 0n);
const changeAmount = BigInt(info.total_orchard_output) - paymentTotal;
// Build expected change
const expectedChange = changeAmount > 0n
? [new t2z.WasmExpectedTxOut(changeAddress, changeAmount)]
: [];
// Verify
t2z.verify_before_signing(pczt, payments, expectedChange);
When to Use
- PCZT came from another system
- Hardware wallet workflow
- Multi-party transaction construction
May be skipped when you created the PCZT yourself.
See Also
