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lnwallet: introduce GetDustSum method to calculate worst-case dust sum

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It over-estimates the local or remote commitment's dust sum by
counting all updates in both updateLogs that are dust using the
trimmed-to-dust mechanism if applicable. The over-estimation is done
because ensuring an accurate counting is a trade-off between code
simplicity and accuracy.
This commit is contained in:
eugene
2021-09-28 11:34:10 -04:00
parent 34cb9357ee
commit 7d16e58b5c
4 changed files with 255 additions and 18 deletions
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8
lnwallet/commitment.go
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@@ -440,7 +440,7 @@ func (cb *CommitmentBuilder) createUnsignedCommitmentTx(ourBalance,
numHTLCs := int64(0)
for _, htlc := range filteredHTLCView.ourUpdates {
if htlcIsDust(
if HtlcIsDust(
cb.chanState.ChanType, false, isOurs, feePerKw,
htlc.Amount.ToSatoshis(), dustLimit,
) {
@@ -450,7 +450,7 @@ func (cb *CommitmentBuilder) createUnsignedCommitmentTx(ourBalance,
numHTLCs++
}
for _, htlc := range filteredHTLCView.theirUpdates {
if htlcIsDust(
if HtlcIsDust(
cb.chanState.ChanType, true, isOurs, feePerKw,
htlc.Amount.ToSatoshis(), dustLimit,
) {
@@ -529,7 +529,7 @@ func (cb *CommitmentBuilder) createUnsignedCommitmentTx(ourBalance,
// purposes of sorting.
cltvs := make([]uint32, len(commitTx.TxOut))
for _, htlc := range filteredHTLCView.ourUpdates {
if htlcIsDust(
if HtlcIsDust(
cb.chanState.ChanType, false, isOurs, feePerKw,
htlc.Amount.ToSatoshis(), dustLimit,
) {
@@ -546,7 +546,7 @@ func (cb *CommitmentBuilder) createUnsignedCommitmentTx(ourBalance,
cltvs = append(cltvs, htlc.Timeout)
}
for _, htlc := range filteredHTLCView.theirUpdates {
if htlcIsDust(
if HtlcIsDust(
cb.chanState.ChanType, true, isOurs, feePerKw,
htlc.Amount.ToSatoshis(), dustLimit,
) {