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lnwallet: eliminate usage of LightningChannel.theirPrevPkScript

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This commit removes the theirPrevPkScript field from the
LightningChannel struct all together. It’s no longer needed as the more
fundamental mutation bug has been fixed within the channel state
machine.
This commit is contained in:
Olaoluwa Osuntokun 2017-04-11 21:38:55 -07:00
parent a3fd738491
commit 4cd277c8da
No known key found for this signature in database
GPG Key ID: 9CC5B105D03521A2
1 changed files with 7 additions and 30 deletions
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37
lnwallet/channel.go
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@ -276,7 +276,7 @@ func (c *commitment) toChannelDelta(ourCommit bool) (*channeldb.ChannelDelta, er
found bool
)
pkScript := p.theirPrevPkScript
pkScript := p.theirPkScript
if ourCommit {
pkScript = p.ourPkScript
}
@ -294,8 +294,8 @@ func (c *commitment) toChannelDelta(ourCommit bool) (*channeldb.ChannelDelta, er
}
}
if !found {
return 0, fmt.Errorf("could not find a matching " +
"output for the HTLC in the commitment transaction")
return 0, fmt.Errorf("unable to find htlc: script=%x, value=%v",
pkScript, p.Amount)
}
return idx, nil
@ -309,8 +309,8 @@ func (c *commitment) toChannelDelta(ourCommit bool) (*channeldb.ChannelDelta, er
if (ourCommit && htlc.isDustLocal) ||
(!ourCommit && htlc.isDustRemote) {
index = maxUint16
} else if index, err = locateOutputIndex(htlc); err != nil {
return nil, err
} else if index, err = locateOutputIndex(&htlc); err != nil {
return nil, fmt.Errorf("unable to find outgoing htlc: %v", err)
}
h := &channeldb.HTLC{
@ -328,8 +328,8 @@ func (c *commitment) toChannelDelta(ourCommit bool) (*channeldb.ChannelDelta, er
if (ourCommit && htlc.isDustLocal) ||
(!ourCommit && htlc.isDustRemote) {
index = maxUint16
} else if index, err = locateOutputIndex(htlc); err != nil {
return nil, err
} else if index, err = locateOutputIndex(&htlc); err != nil {
return nil, fmt.Errorf("unable to find incoming htlc: %v", err)
}
h := &channeldb.HTLC{
@ -2075,12 +2075,6 @@ func (lc *LightningChannel) SettleHTLC(preimage [32]byte) (uint64, error) {
lc.localUpdateLog.appendUpdate(pd)
// Since we will not be adding this HTLC to any commitment transaction
// anymore, we should properly set theirPrevPkScript so we can generate
// a valid ChannelDelta for a revoked remote commitment.
addEntry := lc.remoteUpdateLog.lookup(targetHTLC.Index)
addEntry.theirPrevPkScript = addEntry.theirPkScript
lc.rHashMap[paymentHash][0] = nil
lc.rHashMap[paymentHash] = lc.rHashMap[paymentHash][1:]
if len(lc.rHashMap[paymentHash]) == 0 {
@ -2117,12 +2111,6 @@ func (lc *LightningChannel) ReceiveHTLCSettle(preimage [32]byte, logIndex uint64
}
lc.remoteUpdateLog.appendUpdate(pd)
// Since we will not be adding this HTLC to any commitment transaction
// anymore, we should properly set theirPrevPkScript so we can generate
// a valid ChannelDelta for a revoked remote commitment.
htlc.theirPrevPkScript = htlc.theirPkScript
return nil
}
@ -2150,11 +2138,6 @@ func (lc *LightningChannel) FailHTLC(rHash [32]byte) (uint64, error) {
lc.localUpdateLog.appendUpdate(pd)
// Since we will not be adding this HTLC to any commitment transaction
// anymore, we should properly set theirPrevPkScript so we can generate
// a valid ChannelDelta for a revoked remote commitment.
addEntry.theirPrevPkScript = addEntry.theirPkScript
lc.rHashMap[rHash][0] = nil
lc.rHashMap[rHash] = lc.rHashMap[rHash][1:]
if len(lc.rHashMap[rHash]) == 0 {
@ -2187,11 +2170,6 @@ func (lc *LightningChannel) ReceiveFailHTLC(logIndex uint64) error {
lc.remoteUpdateLog.appendUpdate(pd)
// Since we will not be adding this HTLC to any commitment transaction
// anymore, we should properly set theirPrevPkScript so we can generate
// a valid ChannelDelta for a revoked remote commitment.
htlc.theirPrevPkScript = htlc.theirPkScript
return nil
}
@ -2282,7 +2260,6 @@ func (lc *LightningChannel) addHTLC(commitTx *wire.MsgTx, ourCommit bool,
if ourCommit {
paymentDesc.ourPkScript = htlcP2WSH
} else {
paymentDesc.theirPrevPkScript = paymentDesc.theirPkScript
paymentDesc.theirPkScript = htlcP2WSH
}