multi: add new build tag integration

This commit adds a new build tag `integration` and removes the old tag
`rpctest` for clarity. Multiple unnecessary usages of `build !rpctest`
is also removed.

lncfg/protocol_integration.go

@@ -0,0 +1,83 @@
+//go:build integration
+
+package lncfg
+
+// ProtocolOptions is a struct that we use to be able to test backwards
+// compatibility of protocol additions, while defaulting to the latest within
+// lnd, or to enable experimental protocol changes.
+//
+// TODO(yy): delete this build flag to unify with `lncfg/protocol.go`.
+//
+//nolint:lll
+type ProtocolOptions struct {
+	// LegacyProtocol is a sub-config that houses all the legacy protocol
+	// options.  These are mostly used for integration tests as most modern
+	// nodes should always run with them on by default.
+	LegacyProtocol `group:"legacy" namespace:"legacy"`
+
+	// ExperimentalProtocol is a sub-config that houses any experimental
+	// protocol features that also require a build-tag to activate.
+	ExperimentalProtocol
+
+	// WumboChans should be set if we want to enable support for wumbo
+	// (channels larger than 0.16 BTC) channels, which is the opposite of
+	// mini.
+	WumboChans bool `long:"wumbo-channels" description:"if set, then lnd will create and accept requests for channels larger chan 0.16 BTC"`
+
+	// Anchors enables anchor commitments.
+	// TODO(halseth): transition itests to anchors instead!
+	Anchors bool `long:"anchors" description:"enable support for anchor commitments"`
+
+	// ScriptEnforcedLease enables script enforced commitments for channel
+	// leases.
+	//
+	// TODO: Move to experimental?
+	ScriptEnforcedLease bool `long:"script-enforced-lease" description:"enable support for script enforced lease commitments"`
+
+	// OptionScidAlias should be set if we want to signal the
+	// option-scid-alias feature bit. This allows scid aliases and the
+	// option-scid-alias channel-type.
+	OptionScidAlias bool `long:"option-scid-alias" description:"enable support for option_scid_alias channels"`
+
+	// OptionZeroConf should be set if we want to signal the zero-conf
+	// feature bit.
+	OptionZeroConf bool `long:"zero-conf" description:"enable support for zero-conf channels, must have option-scid-alias set also"`
+
+	// NoOptionAnySegwit should be set to true if we don't want to use any
+	// Taproot (and beyond) addresses for co-op closing.
+	NoOptionAnySegwit bool `long:"no-any-segwit" description:"disallow using any segiwt witness version as a co-op close address"`
+}
+
+// Wumbo returns true if lnd should permit the creation and acceptance of wumbo
+// channels.
+func (l *ProtocolOptions) Wumbo() bool {
+	return l.WumboChans
+}
+
+// NoAnchorCommitments returns true if we have disabled support for the anchor
+// commitment type.
+func (l *ProtocolOptions) NoAnchorCommitments() bool {
+	return !l.Anchors
+}
+
+// NoScriptEnforcementLease returns true if we have disabled support for the
+// script enforcement commitment type for leased channels.
+func (l *ProtocolOptions) NoScriptEnforcementLease() bool {
+	return !l.ScriptEnforcedLease
+}
+
+// ScidAlias returns true if we have enabled the option-scid-alias feature bit.
+func (l *ProtocolOptions) ScidAlias() bool {
+	return l.OptionScidAlias
+}
+
+// ZeroConf returns true if we have enabled the zero-conf feature bit.
+func (l *ProtocolOptions) ZeroConf() bool {
+	return l.OptionZeroConf
+}
+
+// NoAnySegwit returns true if we don't signal that we understand other newer
+// segwit witness versions for co-op close addresses.
+func (l *ProtocolOptions) NoAnySegwit() bool {
+	return l.NoOptionAnySegwit
+}