Cooperative Close

lnwire/close_request.go

@@ -0,0 +1,86 @@
+package lnwire
+
+import (
+	"fmt"
+	"github.com/btcsuite/btcd/btcec"
+	"github.com/btcsuite/btcutil"
+
+	"io"
+)
+
+type CloseRequest struct {
+	ReservationID uint64
+
+	RequesterCloseSig *btcec.Signature //Requester's Commitment
+	Fee               btcutil.Amount
+}
+
+func (c *CloseRequest) Decode(r io.Reader, pver uint32) error {
+	//ReservationID (8)
+	//RequesterCloseSig (73)
+	//	First byte length then sig
+	//Fee (8)
+	err := readElements(r,
+		&c.ReservationID,
+		&c.RequesterCloseSig,
+		&c.Fee)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+//Creates a new CloseRequest
+func NewCloseRequest() *CloseRequest {
+	return &CloseRequest{}
+}
+
+//Serializes the item from the CloseRequest struct
+//Writes the data to w
+func (c *CloseRequest) Encode(w io.Writer, pver uint32) error {
+	//ReservationID
+	//RequesterCloseSig
+	//Fee
+	err := writeElements(w,
+		c.ReservationID,
+		c.RequesterCloseSig,
+		c.Fee)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (c *CloseRequest) Command() uint32 {
+	return CmdCloseRequest
+}
+
+func (c *CloseRequest) MaxPayloadLength(uint32) uint32 {
+	//8 + 73 + 8
+	return 89
+}
+
+//Makes sure the struct data is valid (e.g. no negatives or invalid pkscripts)
+func (c *CloseRequest) Validate() error {
+	//Fee must be greater than 0
+	if c.Fee < 0 {
+		return fmt.Errorf("Fee must be greater than zero.")
+	}
+	//We're good!
+	return nil
+}
+
+func (c *CloseRequest) String() string {
+	var serializedSig []byte
+	if c.RequesterCloseSig != nil && c.RequesterCloseSig.R != nil {
+		serializedSig = c.RequesterCloseSig.Serialize()
+	}
+
+	return fmt.Sprintf("\n--- Begin CloseRequest ---\n") +
+		fmt.Sprintf("ReservationID:\t\t%d\n", c.ReservationID) +
+		fmt.Sprintf("CloseSig\t\t%x\n", serializedSig) +
+		fmt.Sprintf("Fee:\t\t\t%d\n", c.Fee) +
+		fmt.Sprintf("--- End CloseRequest ---\n")
+}