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input: eliminate CSV trick for HTLC outputs

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This commit is contained in:
Olaoluwa Osuntokun 2023-05-24 21:13:41 -07:00
parent 6ce7f5d29e
commit 4733da5ccb
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GPG Key ID: 3BBD59E99B280306
1 changed files with 8 additions and 4 deletions
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12
input/script_utils.go
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@ -553,7 +553,7 @@ func SenderHTLCTapLeafTimeout(senderHtlcKey,
// OP_SIZE 32 OP_EQUALVERIFY OP_HASH160
// <RIPEMD160(payment_hash)> OP_EQUALVERIFY
// <remote_htlcpubkey> OP_CHECKSIG
// OP_CHECKSEQUENCEVERIFY
// 1 OP_CHECKSEQUENCEVERIFY OP_DROP
func SenderHTLCTapLeafSuccess(receiverHtlcKey *btcec.PublicKey,
paymentHash []byte) (txscript.TapLeaf, error) {
@ -574,7 +574,9 @@ func SenderHTLCTapLeafSuccess(receiverHtlcKey *btcec.PublicKey,
// after confirmation to properly sweep.
builder.AddData(schnorr.SerializePubKey(receiverHtlcKey))
builder.AddOp(txscript.OP_CHECKSIG)
builder.AddOp(txscript.OP_1)
builder.AddOp(txscript.OP_CHECKSEQUENCEVERIFY)
builder.AddOp(txscript.OP_DROP)
successLeafScript, err := builder.Script()
if err != nil {
@ -663,7 +665,7 @@ func senderHtlcTapScriptTree(senderHtlcKey, receiverHtlcKey,
// OP_SIZE 32 OP_EQUALVERIFY
// OP_HASH160 <RIPEMD160(payment_hash)> OP_EQUALVERIFY
// <remote_htlcpubkey> OP_CHECKSIG
// OP_CHECKSEQUENCEVERIFY
// 1 OP_CHECKSEQUENCEVERIFY OP_DROP
//
// The timeout path can be spent with a witness of (sender timeout):
//
@ -1070,7 +1072,7 @@ func ReceiverHtlcSpendTimeout(signer Signer, signDesc *SignDescriptor,
// timeout the HTLC after expiry:
//
// <sender_htlcpubkey> OP_CHECKSIG
// OP_CHECKSEQUENCEVERIFY
// 1 OP_CHECKSEQUENCEVERIFY OP_DROP
// <cltv_expiry> OP_CHECKLOCKTIMEVERIFY OP_DROP
func ReceiverHtlcTapLeafTimeout(senderHtlcKey *btcec.PublicKey,
cltvExpiry uint32) (txscript.TapLeaf, error) {
@ -1081,7 +1083,9 @@ func ReceiverHtlcTapLeafTimeout(senderHtlcKey *btcec.PublicKey,
// sender authorizing the spend (the timeout).
builder.AddData(schnorr.SerializePubKey(senderHtlcKey))
builder.AddOp(txscript.OP_CHECKSIG)
builder.AddOp(txscript.OP_1)
builder.AddOp(txscript.OP_CHECKSEQUENCEVERIFY)
builder.AddOp(txscript.OP_DROP)
// The second portion will ensure that the CLTV expiry on the spending
// transaction is correct.
@ -1191,7 +1195,7 @@ func receiverHtlcTapScriptTree(senderHtlcKey, receiverHtlcKey,
//
// - The timeout path:
// <remote_htlcpubkey> OP_CHECKSIG
// OP_CHECKSEQUENCEVERIFY
// 1 OP_CHECKSEQUENCEVERIFY OP_DROP
// <cltv_expiry> OP_CHECKLOCKTIMEVERIFY OP_DROP
//
// - Success path: