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67 lines
1.7 KiB
67 lines
1.7 KiB
package identity
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import (
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"bytes"
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"errors"
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"github.com/harmony-one/harmony/proto"
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)
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// IdentityMessageTypeBytes is the number of bytes consensus message type occupies
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const IdentityMessageTypeBytes = 1
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// IdentityMessageType is the identity message type.
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type IdentityMessageType byte
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// Constants of IdentityMessageType.
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const (
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Identity IdentityMessageType = iota
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// TODO: add more types
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)
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// MessageType ...
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type MessageType int
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// Constants of MessageType.
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const (
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Register MessageType = iota
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Acknowledge
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)
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// Returns string name for the MessageType enum
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func (msgType MessageType) String() string {
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names := [...]string{
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"Register",
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"Acknowledge",
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}
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if msgType < Register || msgType > Acknowledge {
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return "Unknown"
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}
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return names[msgType]
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}
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// GetIdentityMessageType Get the identity message type from the identity message
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func GetIdentityMessageType(message []byte) (MessageType, error) {
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if len(message) < 1 {
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return 0, errors.New("Failed to get identity message type: no data available.")
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}
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return MessageType(message[0]), nil
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}
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// GetIdentityMessagePayload message payload from the identity message
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func GetIdentityMessagePayload(message []byte) ([]byte, error) {
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if len(message) < 2 {
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return []byte{}, errors.New("Failed to get identity message payload: no data available.")
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}
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return message[IdentityMessageTypeBytes:], nil
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}
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// Concatenate msgType as one byte with payload, and return the whole byte array
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func ConstructIdentityMessage(identityMessageType MessageType, payload []byte) []byte {
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byteBuffer := bytes.NewBuffer([]byte{byte(proto.Identity)})
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byteBuffer.WriteByte(byte(Identity))
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byteBuffer.WriteByte(byte(identityMessageType))
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byteBuffer.Write(payload)
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return byteBuffer.Bytes()
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}
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