highperfocused/lnd
1
0
Fork 0
mirror of https://github.com/lightningnetwork/lnd.git synced 2025-07-12 22:22:36 +02:00
Code Issues Packages Projects Releases Wiki Activity

input+lnwallet: use individual commit weight calculations for channel type

Browse Source 
Based on the channel type, the commitment weight will be calculated.
This commit is contained in:
Johan T. Halseth
2020-03-06 16:11:46 +01:00
parent 1f28bd8086
commit ea94dbbe34
3 changed files with 44 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
input/size.go
View File

@ -122,6 +122,12 @@ const (
// - PkScript (P2WPKH)
CommitmentKeyHashOutput = 8 + 1 + P2WPKHSize
// CommitmentAnchorOutput 43 bytes
// - Value: 8 bytes
// - VarInt: 1 byte (PkScript length)
// - PkScript (P2WSH)
CommitmentAnchorOutput = 8 + 1 + P2WSHSize
// HTLCSize 43 bytes
// - Value: 8 bytes
// - VarInt: 1 byte (PkScript length)
@ -159,9 +165,32 @@ const (
// WitnessCommitmentTxWeight 224 weight
WitnessCommitmentTxWeight = WitnessHeaderSize + WitnessSize
// BaseAnchorCommitmentTxSize 225 + 43 * num-htlc-outputs bytes
// - Version: 4 bytes
// - WitnessHeader <---- part of the witness data
// - CountTxIn: 1 byte
// - TxIn: 41 bytes
// FundingInput
// - CountTxOut: 3 byte
// - TxOut: 4*43 + 43 * num-htlc-outputs bytes
// OutputPayingToThem,
// OutputPayingToUs,
// AnchorPayingToThem,
// AnchorPayingToUs,
// ....HTLCOutputs...
// - LockTime: 4 bytes
BaseAnchorCommitmentTxSize = 4 + 1 + FundingInputSize + 3 +
2*CommitmentDelayOutput + 2*CommitmentAnchorOutput + 4
// BaseAnchorCommitmentTxWeight 900 weight
BaseAnchorCommitmentTxWeight = witnessScaleFactor * BaseAnchorCommitmentTxSize
// CommitWeight 724 weight
CommitWeight = BaseCommitmentTxWeight + WitnessCommitmentTxWeight
// AnchorCommitWeight 1124 weight
AnchorCommitWeight = BaseAnchorCommitmentTxWeight + WitnessCommitmentTxWeight
// HTLCWeight 172 weight
HTLCWeight = witnessScaleFactor * HTLCSize