109 lines
3.1 KiB
Go
109 lines
3.1 KiB
Go
package lnwire
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import (
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"fmt"
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"io"
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"github.com/roasbeef/btcd/btcec"
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)
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// SingleFundingSignComplete is the message Bob sends to Alice which delivers
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// a signature for Alice's version of the commitment transaction. After thie
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// message is received and processed by Alice, she is free to broadcast the
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// funding transaction.
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type SingleFundingSignComplete struct {
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// ChannelID serves to uniquely identify the future channel created by
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// the initiated single funder workflow.
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ChannelID uint64
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// CommitSignature is Bobs's signature for Alice's version of the
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// commitment transaction.
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CommitSignature *btcec.Signature
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}
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// NewSingleFundingSignComplete creates a new empty SingleFundingSignComplete
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// message.
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func NewSingleFundingSignComplete(chanID uint64,
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sig *btcec.Signature) *SingleFundingSignComplete {
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return &SingleFundingSignComplete{
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ChannelID: chanID,
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CommitSignature: sig,
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}
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}
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// Decode deserializes the serialized SingleFundingSignComplete stored in the
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// passed io.Reader into the target SingleFundingComplete using the
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// deserialization rules defined by the passed protocol version.
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//
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// This is part of the lnwire.Message interface.
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func (c *SingleFundingSignComplete) Decode(r io.Reader, pver uint32) error {
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// ChannelID (8)
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// CommitmentSignature (73)
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err := readElements(r,
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&c.ChannelID,
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&c.CommitSignature)
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if err != nil {
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return err
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}
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return nil
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}
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// Encode serializes the target SingleFundingSignComplete into the passed
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// io.Writer implementation. Serialization will observe the rules defined by
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// the passed protocol version.
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//
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// This is part of the lnwire.Message interface.
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func (c *SingleFundingSignComplete) Encode(w io.Writer, pver uint32) error {
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err := writeElements(w,
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c.ChannelID,
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c.CommitSignature)
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if err != nil {
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return err
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}
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return nil
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}
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// Command returns the uint32 code which uniquely identifies this message as a
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// SingleFundingSignComplete on the wire.
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//
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// This is part of the lnwire.Message interface.
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func (c *SingleFundingSignComplete) Command() uint32 {
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return CmdSingleFundingSignComplete
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}
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// MaxPayloadLength returns the maximum allowed payload length for a
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// SingleFundingComplete. This is calculated by summing the max length of all
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// the fields within a SingleFundingResponse. The final breakdown
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// is: 8 + 73 = 81
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//
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// This is part of the lnwire.Message interface.
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func (c *SingleFundingSignComplete) MaxPayloadLength(uint32) uint32 {
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return 81
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}
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// Validate examines each populated field within the SingleFundingComplete for
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// field sanity.
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//
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// This is part of the lnwire.Message interface.
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func (s *SingleFundingSignComplete) Validate() error {
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if s.CommitSignature == nil {
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return fmt.Errorf("commitment signature must be non-nil")
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}
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// We're good!
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return nil
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}
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// String returns the string representation of the SingleFundingSignComplete.
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//
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// This is part of the lnwire.Message interface.
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func (c *SingleFundingSignComplete) String() string {
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return fmt.Sprintf("\n--- Begin FundingSignComplete ---\n") +
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fmt.Sprintf("ChannelID:\t\t%d\n", c.ChannelID) +
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fmt.Sprintf("CommitSignature\t\t%s\n", c.CommitSignature) +
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fmt.Sprintf("--- End FundingSignComplete ---\n")
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}
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