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message.go
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message.go
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// Copyright © 2022 AMIS Technologies
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package refresh
import (
"github.com/getamis/alice/types"
"github.com/minio/blake2b-simd"
"google.golang.org/protobuf/proto"
)
func (m *Message) IsValid() bool {
switch m.Type {
case Type_Round1:
return m.GetRound1() != nil
case Type_Round2:
return m.GetRound2() != nil
case Type_Round3:
return m.GetRound3() != nil
}
return false
}
func (m *Message) GetMessageType() types.MessageType {
return types.MessageType(m.Type)
}
func (m *Message) EchoHash() ([]byte, error) {
echoMsg := m.GetEchoMessage()
if echoMsg == nil {
return nil, nil
}
// NOTE: there's an issue if there's a map field in the message
// https://developers.google.com/protocol-buffers/docs/encoding#implications
// Deterministic serialization only guarantees the same byte output for a particular binary.
bs, err := proto.Marshal(echoMsg.(*Message))
if err != nil {
return nil, err
}
got := blake2b.Sum256(bs)
return got[:], nil
}
func (m *Message) GetEchoMessage() types.Message {
mm := &Message{
Type: m.Type,
Id: m.Id,
}
switch m.Type {
case Type_Round1:
mm.Body = &Message_Round1{
Round1: &Round1Msg{
Commitment: m.GetRound1().GetCommitment(),
},
}
}
return nil
}