package lnwire import ( "fmt" "io" "github.com/roasbeef/btcd/btcec" ) // SingleFundingSignComplete is the message Bob sends to Alice which delivers // a signature for Alice's version of the commitment transaction. After this // message is received and processed by Alice, she is free to broadcast the // funding transaction. type SingleFundingSignComplete struct { // ChannelID serves to uniquely identify the future channel created by // the initiated single funder workflow. ChannelID uint64 // CommitSignature is Bobs's signature for Alice's version of the // commitment transaction. CommitSignature *btcec.Signature } // NewSingleFundingSignComplete creates a new empty SingleFundingSignComplete // message. func NewSingleFundingSignComplete(chanID uint64, sig *btcec.Signature) *SingleFundingSignComplete { return &SingleFundingSignComplete{ ChannelID: chanID, CommitSignature: sig, } } // Decode deserializes the serialized SingleFundingSignComplete stored in the // passed io.Reader into the target SingleFundingComplete using the // deserialization rules defined by the passed protocol version. // // This is part of the lnwire.Message interface. func (c *SingleFundingSignComplete) Decode(r io.Reader, pver uint32) error { // ChannelID (8) // CommitmentSignature (73) err := readElements(r, &c.ChannelID, &c.CommitSignature) if err != nil { return err } return nil } // Encode serializes the target SingleFundingSignComplete into the passed // io.Writer implementation. Serialization will observe the rules defined by // the passed protocol version. // // This is part of the lnwire.Message interface. func (c *SingleFundingSignComplete) Encode(w io.Writer, pver uint32) error { err := writeElements(w, c.ChannelID, c.CommitSignature) if err != nil { return err } return nil } // Command returns the uint32 code which uniquely identifies this message as a // SingleFundingSignComplete on the wire. // // This is part of the lnwire.Message interface. func (c *SingleFundingSignComplete) Command() uint32 { return CmdSingleFundingSignComplete } // MaxPayloadLength returns the maximum allowed payload length for a // SingleFundingComplete. This is calculated by summing the max length of all // the fields within a SingleFundingResponse. The final breakdown // is: 8 + 73 = 81 // // This is part of the lnwire.Message interface. func (c *SingleFundingSignComplete) MaxPayloadLength(uint32) uint32 { return 81 } // Validate examines each populated field within the SingleFundingComplete for // field sanity. // // This is part of the lnwire.Message interface. func (s *SingleFundingSignComplete) Validate() error { if s.CommitSignature == nil { return fmt.Errorf("commitment signature must be non-nil") } // We're good! return nil }