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lnwallet: properly handle HTLC settles in channel state-machine

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We no longer track HTLC’s by their r-hash within the log into the
index, as we may have multiple HTLC’s that can be redeemed by the same
pre-image. Instead we now use a separate index which is keyed by a
log-index.

Additionally, the SettleHTLC method now also returns the index of the
HTLC being settled which allows the remote party to quickly locate the
HTLC within their log.

This commit also introduces a few trace/debug log messages which will
likely be pruned in the near future
This commit is contained in:
Olaoluwa Osuntokun
2016-07-12 17:35:51 -07:00
parent 06f062e678
commit 7dea354711
3 changed files with 56 additions and 33 deletions
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3
lnwallet/script_utils.go
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@@ -348,7 +348,8 @@ func senderHtlcSpendTimeout(commitScript []byte, outputAmt btcutil.Amount,
// OP_ENDIF
// <sender key> OP_CHECKSIG
// OP_ENDIF
// TODO(roasbeef): rename these to sender vs receiver?
// TODO(roasbeef): go back to revocation keys in the HTLC outputs?
// * also could combine pre-image with their key?
func receiverHTLCScript(absoluteTimeout, relativeTimeout uint32, senderKey,
receiverKey *btcec.PublicKey, revokeHash, paymentHash []byte) ([]byte, error) {