highperfocused/lnd
1
0
Fork 0
mirror of https://github.com/lightningnetwork/lnd.git synced 2025-10-10 23:42:44 +02:00
Code Issues Packages Projects Releases Wiki Activity

input: introduce Signature iface

Browse Source 
This commit introduces the Signature interface which will be used by our
witness construction methods instead of passing in raw byte slices. This
will be used later to inject various kinds of mock signatures, e.g.
73-byte signatures for simulating worst-case witness weight.
This commit is contained in:
Conner Fromknecht
2020-04-05 17:06:14 -07:00
parent 2b2c8b5a10
commit 37dffb225a
3 changed files with 37 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
input/script_utils.go
View File

@@ -23,6 +23,13 @@ var (
SequenceLockTimeSeconds = uint32(1 << 22)
)
// Signature is an interface for objects that can populate signatures during
// witness construction.
type Signature interface {
// Serialize returns a DER-encoded ECDSA signature.
Serialize() []byte
}
// WitnessScriptHash generates a pay-to-witness-script-hash public key script
// paying to a version 0 witness program paying to the passed redeem script.
func WitnessScriptHash(witnessScript []byte) ([]byte, error) {
@@ -343,7 +350,7 @@ func SenderHtlcSpendRedeem(signer Signer, signDesc *SignDescriptor,
// HTLC to activate the time locked covenant clause of a soon to be expired
// HTLC. This script simply spends the multi-sig output using the
// pre-generated HTLC timeout transaction.
func SenderHtlcSpendTimeout(receiverSig []byte,
func SenderHtlcSpendTimeout(receiverSig Signature,
receiverSigHash txscript.SigHashType, signer Signer,
signDesc *SignDescriptor, htlcTimeoutTx *wire.MsgTx) (
wire.TxWitness, error) {
@@ -359,7 +366,7 @@ func SenderHtlcSpendTimeout(receiverSig []byte,
// original OP_CHECKMULTISIG.
witnessStack := wire.TxWitness(make([][]byte, 5))
witnessStack[0] = nil
witnessStack[1] = append(receiverSig, byte(receiverSigHash))
witnessStack[1] = append(receiverSig.Serialize(), byte(receiverSigHash))
witnessStack[2] = append(sweepSig, byte(signDesc.HashType))
witnessStack[3] = nil
witnessStack[4] = signDesc.WitnessScript
@@ -508,7 +515,7 @@ func ReceiverHTLCScript(cltvExpiry uint32, senderHtlcKey,
// signed has a relative timelock delay enforced by its sequence number. This
// delay give the sender of the HTLC enough time to revoke the output if this
// is a breach commitment transaction.
func ReceiverHtlcSpendRedeem(senderSig []byte,
func ReceiverHtlcSpendRedeem(senderSig Signature,
senderSigHash txscript.SigHashType, paymentPreimage []byte,
signer Signer, signDesc *SignDescriptor, htlcSuccessTx *wire.MsgTx) (
wire.TxWitness, error) {
@@ -527,7 +534,7 @@ func ReceiverHtlcSpendRedeem(senderSig []byte,
// order to consume the extra pop within OP_CHECKMULTISIG.
witnessStack := wire.TxWitness(make([][]byte, 5))
witnessStack[0] = nil
witnessStack[1] = append(senderSig, byte(senderSigHash))
witnessStack[1] = append(senderSig.Serialize(), byte(senderSigHash))
witnessStack[2] = append(sweepSig, byte(signDesc.HashType))
witnessStack[3] = paymentPreimage
witnessStack[4] = signDesc.WitnessScript