htlcswitch: create dynamic commit negotiation state machine api

Author: ProofOfKeags

htlcswitch/dyncomm_negotiator.go

@@ -0,0 +1,86 @@
+package htlcswitch
+
+import (
+	"github.com/btcsuite/btcd/btcec/v2"
+	"github.com/btcsuite/btcd/btcutil"
+	"github.com/lightningnetwork/lnd/fn"
+	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
+	"github.com/lightningnetwork/lnd/lnwire"
+)
+
+type DynUpdate func(*lnwire.DynPropose)
+
+func WithDustLimit(amt btcutil.Amount) DynUpdate {
+	return func(dp *lnwire.DynPropose) {
+		dp.DustLimit = fn.Some(amt)
+	}
+}
+
+func WithMaxValueInFlight(amt lnwire.MilliSatoshi) DynUpdate {
+	return func(dp *lnwire.DynPropose) {
+		dp.MaxValueInFlight = fn.Some(amt)
+	}
+}
+
+func WithChannelReserve(amt btcutil.Amount) DynUpdate {
+	return func(dp *lnwire.DynPropose) {
+		dp.ChannelReserve = fn.Some(amt)
+	}
+}
+
+func WithCsvDelay(blks uint16) DynUpdate {
+	return func(dp *lnwire.DynPropose) {
+		dp.CsvDelay = fn.Some(blks)
+	}
+}
+
+func WithMaxAcceptedHTLCs(max uint16) DynUpdate {
+	return func(dp *lnwire.DynPropose) {
+		dp.MaxAcceptedHTLCs = fn.Some(max)
+	}
+}
+
+func WithFundingKey(key btcec.PublicKey) DynUpdate {
+	return func(dp *lnwire.DynPropose) {
+		dp.FundingKey = fn.Some(key)
+	}
+}
+
+func WithChannelType(ty lnwire.ChannelType,
+	rate chainfee.SatPerKWeight) DynUpdate {
+
+	return func(dp *lnwire.DynPropose) {
+		dp.ChannelType = fn.Some(ty)
+		dp.KickoffFeerate = fn.Some(rate)
+	}
+}
+
+type dyncommNegotiator struct {}
+
+type DynResponse = fn.Either[lnwire.DynAck, lnwire.DynReject]
+
+func (*dyncommNegotiator) recvDynPropose(msg lnwire.DynPropose) (
+	DynResponse, error) {
+
+	panic("NOT IMPLEMENTED: dyncommNegotiator.recvDynPropose")
+}
+
+func (*dyncommNegotiator) recvDynAck(msg lnwire.DynAck) (lnwire.DynPropose,
+	error) {
+
+	panic("NOT IMPLEMENTED: dyncommNegotiator.recvDynAck")
+}
+
+func (*dyncommNegotiator) recvDynReject(msg lnwire.DynReject) error {
+	panic("NOT IMPLEMENTED: dyncommNegotiator.recvDynReject")
+}
+
+func (*dyncommNegotiator) sendDynPropose(
+	updates ...DynUpdate) lnwire.DynPropose {
+
+	panic("NOT IMPLEMENTED: dyncommNegotiator.sendDynPropose")
+}
+
+func (*dyncommNegotiator) reset() {
+	panic("NOT IMPLEMENTED: dyncommNegotiator.reset")
+}