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Merge pull request #3821 from halseth/pluggable-anchors-lnwallet

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[anchor] pluggable anchor commitments
This commit is contained in:
Olaoluwa Osuntokun authored and GitHub committed 2020-03-09 19:49:05 -07:00
2 parents f29169e7d6 b7885dbbae
commit 3dda93e30d
37 files changed
+1848 -604
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input/size.go
+76 -33
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@@ -132,6 +132,12 @@ 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)
@@ -169,9 +175,32 @@ 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
@@ -183,6 +212,23 @@ const (
// which will transition an incoming HTLC to the delay-and-claim state.
HtlcSuccessWeight = 703
// HtlcConfirmedScriptOverhead is the extra length of an HTLC script
// that requires confirmation before it can be spent. These extra bytes
// is a result of the extra CSV check.
HtlcConfirmedScriptOverhead = 3
// HtlcTimeoutWeightConfirmed is the weight of the HTLC timeout
// transaction which will transition an outgoing HTLC to the
// delay-and-claim state, for the confirmed HTLC outputs. It is 3 bytes
// larger because of the additional CSV check in the input script.
HtlcTimeoutWeightConfirmed = HtlcTimeoutWeight + HtlcConfirmedScriptOverhead
// HtlcSuccessWeightCOnfirmed is the weight of the HTLC success
// transaction which will transition an incoming HTLC to the
// delay-and-claim state, for the confirmed HTLC outputs. It is 3 bytes
// larger because of the cdditional CSV check in the input script.
HtlcSuccessWeightConfirmed = HtlcSuccessWeight + HtlcConfirmedScriptOverhead
// MaxHTLCNumber is the maximum number HTLCs which can be included in a
// commitment transaction. This limit was chosen such that, in the case
// of a contract breach, the punishment transaction is able to sweep
@@ -223,7 +269,23 @@ const (
// - witness_script (to_local_script)
ToLocalPenaltyWitnessSize = 1 + 1 + 73 + 1 + 1 + ToLocalScriptSize
// AcceptedHtlcScriptSize 139 bytes
// ToRemoteConfirmedScriptSize 37 bytes
// - OP_DATA: 1 byte
// - to_remote_key: 33 bytes
// - OP_CHECKSIGVERIFY: 1 byte
// - OP_1: 1 byte
// - OP_CHECKSEQUENCEVERIFY: 1 byte
ToRemoteConfirmedScriptSize = 1 + 33 + 1 + 1 + 1
// ToRemoteConfirmedWitnessSize 113 bytes
// - number_of_witness_elements: 1 byte
// - sig_length: 1 byte
// - sig: 73 bytes
// - witness_script_length: 1 byte
// - witness_script (to_remote_delayed_script)
ToRemoteConfirmedWitnessSize = 1 + 1 + 73 + 1 + ToRemoteConfirmedScriptSize
// AcceptedHtlcScriptSize 142 bytes
// - OP_DUP: 1 byte
// - OP_HASH160: 1 byte
// - OP_DATA: 1 byte (RIPEMD160(SHA256(revocationkey)) length)
@@ -257,11 +319,14 @@ const (
// - OP_DROP: 1 byte
// - OP_CHECKSIG: 1 byte
// - OP_ENDIF: 1 byte
// - OP_1: 1 byte // These 3 extra bytes are used for both confirmed and regular
// - OP_CSV: 1 byte // HTLC script types. The size won't be correct in all cases,
// - OP_DROP: 1 byte // but it is just an upper bound used for fee estimation in any case.
// - OP_ENDIF: 1 byte
AcceptedHtlcScriptSize = 3*1 + 20 + 5*1 + 33 + 7*1 + 20 + 4*1 +
33 + 5*1 + 4 + 5*1
33 + 5*1 + 4 + 8*1
// AcceptedHtlcTimeoutWitnessSize 216
// AcceptedHtlcTimeoutWitnessSize 219
// - number_of_witness_elements: 1 byte
// - sender_sig_length: 1 byte
// - sender_sig: 73 bytes
@@ -270,20 +335,7 @@ const (
// - witness_script: (accepted_htlc_script)
AcceptedHtlcTimeoutWitnessSize = 1 + 1 + 73 + 1 + 1 + AcceptedHtlcScriptSize
// AcceptedHtlcSuccessWitnessSize 322 bytes
// - number_of_witness_elements: 1 byte
// - nil_length: 1 byte
// - sig_alice_length: 1 byte
// - sig_alice: 73 bytes
// - sig_bob_length: 1 byte
// - sig_bob: 73 bytes
// - preimage_length: 1 byte
// - preimage: 32 bytes
// - witness_script_length: 1 byte
// - witness_script (accepted_htlc_script)
AcceptedHtlcSuccessWitnessSize = 1 + 1 + 73 + 1 + 73 + 1 + 32 + 1 + AcceptedHtlcScriptSize
// AcceptedHtlcPenaltyWitnessSize 249 bytes
// AcceptedHtlcPenaltyWitnessSize 252 bytes
// - number_of_witness_elements: 1 byte
// - revocation_sig_length: 1 byte
// - revocation_sig: 73 bytes
@@ -293,7 +345,7 @@ const (
// - witness_script (accepted_htlc_script)
AcceptedHtlcPenaltyWitnessSize = 1 + 1 + 73 + 1 + 33 + 1 + AcceptedHtlcScriptSize
// OfferedHtlcScriptSize 133 bytes
// OfferedHtlcScriptSize 136 bytes
// - OP_DUP: 1 byte
// - OP_HASH160: 1 byte
// - OP_DATA: 1 byte (RIPEMD160(SHA256(revocationkey)) length)
@@ -324,22 +376,13 @@ const (
// - OP_EQUALVERIFY: 1 byte
// - OP_CHECKSIG: 1 byte
// - OP_ENDIF: 1 byte
// - OP_1: 1 byte
// - OP_CSV: 1 byte
// - OP_DROP: 1 byte
// - OP_ENDIF: 1 byte
OfferedHtlcScriptSize = 3*1 + 20 + 5*1 + 33 + 10*1 + 33 + 5*1 + 20 + 4*1
OfferedHtlcScriptSize = 3*1 + 20 + 5*1 + 33 + 10*1 + 33 + 5*1 + 20 + 7*1
// OfferedHtlcTimeoutWitnessSize 285 bytes
// - number_of_witness_elements: 1 byte
// - nil_length: 1 byte
// - sig_alice_length: 1 byte
// - sig_alice: 73 bytes
// - sig_bob_length: 1 byte
// - sig_bob: 73 bytes
// - nil_length: 1 byte
// - witness_script_length: 1 byte
// - witness_script (offered_htlc_script)
OfferedHtlcTimeoutWitnessSize = 1 + 1 + 1 + 73 + 1 + 73 + 1 + 1 + OfferedHtlcScriptSize
// OfferedHtlcSuccessWitnessSize 317 bytes
// OfferedHtlcSuccessWitnessSize 320 bytes
// - number_of_witness_elements: 1 byte
// - nil_length: 1 byte
// - receiver_sig_length: 1 byte
@@ -352,7 +395,7 @@ const (
// - witness_script (offered_htlc_script)
OfferedHtlcSuccessWitnessSize = 1 + 1 + 1 + 73 + 1 + 73 + 1 + 32 + 1 + OfferedHtlcScriptSize
// OfferedHtlcPenaltyWitnessSize 243 bytes
// OfferedHtlcPenaltyWitnessSize 246 bytes
// - number_of_witness_elements: 1 byte
// - revocation_sig_length: 1 byte
// - revocation_sig: 73 bytes