rename shared package to common

common/intercept_handler.go

@@ -0,0 +1,65 @@
+package common
+
+import (
+	"fmt"
+
+	"github.com/breez/lspd/lightning"
+	"github.com/btcsuite/btcd/wire"
+)
+
+type InterceptAction int
+
+const (
+	INTERCEPT_RESUME              InterceptAction = 0
+	INTERCEPT_RESUME_WITH_ONION   InterceptAction = 1
+	INTERCEPT_FAIL_HTLC_WITH_CODE InterceptAction = 2
+	INTERCEPT_IGNORE              InterceptAction = 3
+)
+
+type InterceptFailureCode uint16
+
+var (
+	FAILURE_TEMPORARY_CHANNEL_FAILURE            InterceptFailureCode = 0x1007
+	FAILURE_AMOUNT_BELOW_MINIMUM                 InterceptFailureCode = 0x100B
+	FAILURE_INCORRECT_CLTV_EXPIRY                InterceptFailureCode = 0x100D
+	FAILURE_TEMPORARY_NODE_FAILURE               InterceptFailureCode = 0x2002
+	FAILURE_UNKNOWN_NEXT_PEER                    InterceptFailureCode = 0x400A
+	FAILURE_INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS InterceptFailureCode = 0x400F
+)
+
+type InterceptRequest struct {
+	// Identifier that uniquely identifies this htlc.
+	// For cln, that's hash of the next onion or the shared secret.
+	Identifier         string
+	Scid               lightning.ShortChannelID
+	PaymentHash        []byte
+	IncomingAmountMsat uint64
+	OutgoingAmountMsat uint64
+	IncomingExpiry     uint32
+	OutgoingExpiry     uint32
+}
+
+func (r *InterceptRequest) PaymentId() string {
+	return fmt.Sprintf("%s|%x", r.Scid.ToString(), r.PaymentHash)
+}
+
+func (r *InterceptRequest) HtlcId() string {
+	return r.Identifier
+}
+
+type InterceptResult struct {
+	Action             InterceptAction
+	FailureCode        InterceptFailureCode
+	Destination        []byte
+	AmountMsat         uint64
+	FeeMsat            *uint64
+	TotalAmountMsat    uint64
+	ChannelPoint       *wire.OutPoint
+	Scid               lightning.ShortChannelID
+	PaymentSecret      []byte
+	UseLegacyOnionBlob bool
+}
+
+type InterceptHandler interface {
+	Intercept(req InterceptRequest) InterceptResult
+}