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ln: fix sweeping htlc output from remote ctx (timeout e.g. without htlc tx)

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Janus 2019-01-22 15:35:05 +01:00 • committed by ThomasV
parent e56e849505
commit 51bc02557d
1 changed files with 5 additions and 1 deletions
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6
electrum/lnsweep.py
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@ -362,6 +362,7 @@ def create_sweeptx_their_ctx_htlc(ctx: Transaction, witness_script: bytes, sweep
preimage: Optional[bytes], output_idx: int,
privkey: bytes, is_revocation: bool, cltv_expiry: int,
fee_per_kb: int=None) -> Optional[Transaction]:
assert type(cltv_expiry) is int
preimage = preimage or b'' # preimage is required iff (not is_revocation and htlc is offered)
val = ctx.outputs()[output_idx].value
sweep_inputs = [{
@ -381,7 +382,10 @@ def create_sweeptx_their_ctx_htlc(ctx: Transaction, witness_script: bytes, sweep
outvalue = val - fee
if outvalue <= dust_threshold(): return None
sweep_outputs = [TxOutput(TYPE_ADDRESS, sweep_address, outvalue)]
tx = Transaction.from_io(sweep_inputs, sweep_outputs, version=2, name=f'their_ctx_sweep_htlc_{ctx.txid()[:8]}_{output_idx}', cltv_expiry=cltv_expiry)
tx = Transaction.from_io(sweep_inputs, sweep_outputs, version=2
, name=f'their_ctx_sweep_htlc_{ctx.txid()[:8]}_{output_idx}'
# note that cltv_expiry, and therefore also locktime will be zero when breach!
, cltv_expiry=cltv_expiry, locktime=cltv_expiry)
sig = bfh(tx.sign_txin(0, privkey))
if not is_revocation: