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lnutil: add htlc witness_script templates for anchors

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extracted from https://github.com/spesmilo/electrum/pull/9628
This commit is contained in:
ThomasV
2025-03-12 16:41:45 +00:00
committed by SomberNight
parent 9d0cc6c4a3
commit 77c180f793
1 changed files with 81 additions and 59 deletions
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140
electrum/lnutil.py
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@@ -858,67 +858,89 @@ def make_received_htlc(
return script
WITNESS_TEMPLATE_OFFERED_HTLC = [
opcodes.OP_DUP,
opcodes.OP_HASH160,
OPPushDataGeneric(None),
opcodes.OP_EQUAL,
opcodes.OP_IF,
opcodes.OP_CHECKSIG,
opcodes.OP_ELSE,
OPPushDataGeneric(None),
opcodes.OP_SWAP,
opcodes.OP_SIZE,
OPPushDataGeneric(lambda x: x==1),
opcodes.OP_EQUAL,
opcodes.OP_NOTIF,
opcodes.OP_DROP,
opcodes.OP_2,
opcodes.OP_SWAP,
OPPushDataGeneric(None),
opcodes.OP_2,
opcodes.OP_CHECKMULTISIG,
opcodes.OP_ELSE,
opcodes.OP_HASH160,
OPPushDataGeneric(None),
opcodes.OP_EQUALVERIFY,
opcodes.OP_CHECKSIG,
opcodes.OP_ENDIF,
opcodes.OP_ENDIF,
]
def witness_template_offered_htlc(anchors):
return [
opcodes.OP_DUP,
opcodes.OP_HASH160,
OPPushDataGeneric(None),
opcodes.OP_EQUAL,
opcodes.OP_IF,
opcodes.OP_CHECKSIG,
opcodes.OP_ELSE,
OPPushDataGeneric(None),
opcodes.OP_SWAP,
opcodes.OP_SIZE,
OPPushDataGeneric(lambda x: x==1),
opcodes.OP_EQUAL,
opcodes.OP_NOTIF,
opcodes.OP_DROP,
opcodes.OP_2,
opcodes.OP_SWAP,
OPPushDataGeneric(None),
opcodes.OP_2,
opcodes.OP_CHECKMULTISIG,
opcodes.OP_ELSE,
opcodes.OP_HASH160,
OPPushDataGeneric(None),
opcodes.OP_EQUALVERIFY,
opcodes.OP_CHECKSIG,
opcodes.OP_ENDIF,
] + ([
opcodes.OP_1,
opcodes.OP_CHECKSEQUENCEVERIFY,
opcodes.OP_DROP,
] if anchors else [
]) + [
opcodes.OP_ENDIF,
]
WITNESS_TEMPLATE_RECEIVED_HTLC = [
opcodes.OP_DUP,
opcodes.OP_HASH160,
OPPushDataGeneric(None),
opcodes.OP_EQUAL,
opcodes.OP_IF,
opcodes.OP_CHECKSIG,
opcodes.OP_ELSE,
OPPushDataGeneric(None),
opcodes.OP_SWAP,
opcodes.OP_SIZE,
OPPushDataGeneric(lambda x: x==1),
opcodes.OP_EQUAL,
opcodes.OP_IF,
opcodes.OP_HASH160,
OPPushDataGeneric(None),
opcodes.OP_EQUALVERIFY,
opcodes.OP_2,
opcodes.OP_SWAP,
OPPushDataGeneric(None),
opcodes.OP_2,
opcodes.OP_CHECKMULTISIG,
opcodes.OP_ELSE,
opcodes.OP_DROP,
OPPushDataGeneric(None),
opcodes.OP_CHECKLOCKTIMEVERIFY,
opcodes.OP_DROP,
opcodes.OP_CHECKSIG,
opcodes.OP_ENDIF,
opcodes.OP_ENDIF,
]
WITNESS_TEMPLATE_OFFERED_HTLC = witness_template_offered_htlc(anchors=False)
WITNESS_TEMPLATE_OFFERED_HTLC_ANCHORS = witness_template_offered_htlc(anchors=True)
def witness_template_received_htlc(anchors):
return [
opcodes.OP_DUP,
opcodes.OP_HASH160,
OPPushDataGeneric(None),
opcodes.OP_EQUAL,
opcodes.OP_IF,
opcodes.OP_CHECKSIG,
opcodes.OP_ELSE,
OPPushDataGeneric(None),
opcodes.OP_SWAP,
opcodes.OP_SIZE,
OPPushDataGeneric(lambda x: x==1),
opcodes.OP_EQUAL,
opcodes.OP_IF,
opcodes.OP_HASH160,
OPPushDataGeneric(None),
opcodes.OP_EQUALVERIFY,
opcodes.OP_2,
opcodes.OP_SWAP,
OPPushDataGeneric(None),
opcodes.OP_2,
opcodes.OP_CHECKMULTISIG,
opcodes.OP_ELSE,
opcodes.OP_DROP,
OPPushDataGeneric(None),
opcodes.OP_CHECKLOCKTIMEVERIFY,
opcodes.OP_DROP,
opcodes.OP_CHECKSIG,
opcodes.OP_ENDIF,
] + ([
opcodes.OP_1,
opcodes.OP_CHECKSEQUENCEVERIFY,
opcodes.OP_DROP,
] if anchors else [
]) + [
opcodes.OP_ENDIF,
]
WITNESS_TEMPLATE_RECEIVED_HTLC = witness_template_received_htlc(anchors=False)
WITNESS_TEMPLATE_RECEIVED_HTLC_ANCHORS = witness_template_received_htlc(anchors=True)
def make_htlc_output_witness_script(