package wire

import (
	"io"
)

// MsgVerAck defines a bitcoin verack message which is used for a peer to acknowledge a version message (MsgVersion)
// after it has used the information to negotiate parameters. It implements the Message interface. This message has no
// payload.
type MsgVerAck struct{}

// BtcDecode decodes r using the bitcoin protocol encoding into the receiver. This is part of the Message interface
// implementation.
func (msg *MsgVerAck) BtcDecode(r io.Reader, pver uint32, enc MessageEncoding) (e error) {
	return nil
}

// BtcEncode encodes the receiver to w using the bitcoin protocol encoding. This is part of the Message interface
// implementation.
func (msg *MsgVerAck) BtcEncode(w io.Writer, pver uint32, enc MessageEncoding) (e error) {
	return nil
}

// Command returns the protocol command string for the message.  This is part of the Message interface implementation.
func (msg *MsgVerAck) Command() string {
	return CmdVerAck
}

// MaxPayloadLength returns the maximum length the payload can be for the receiver. This is part of the Message
// interface implementation.
func (msg *MsgVerAck) MaxPayloadLength(pver uint32) uint32 {
	return 0
}

// NewMsgVerAck returns a new bitcoin verack message that conforms to the Message interface.
func NewMsgVerAck() *MsgVerAck {
	return &MsgVerAck{}
}