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unsigned_message.go
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unsigned_message.go
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// Copyright (C) 2019-2024, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package warp
import (
"fmt"
"github.com/ava-labs/avalanchego/ids"
"github.com/ava-labs/avalanchego/utils/hashing"
)
// UnsignedMessage defines the standard format for an unsigned Warp message.
type UnsignedMessage struct {
NetworkID uint32 `serialize:"true"`
SourceChainID ids.ID `serialize:"true"`
Payload []byte `serialize:"true"`
bytes []byte
id ids.ID
}
// NewUnsignedMessage creates a new *UnsignedMessage and initializes it.
func NewUnsignedMessage(
networkID uint32,
sourceChainID ids.ID,
payload []byte,
) (*UnsignedMessage, error) {
msg := &UnsignedMessage{
NetworkID: networkID,
SourceChainID: sourceChainID,
Payload: payload,
}
return msg, msg.Initialize()
}
// ParseUnsignedMessage converts a slice of bytes into an initialized
// *UnsignedMessage.
func ParseUnsignedMessage(b []byte) (*UnsignedMessage, error) {
msg := &UnsignedMessage{
bytes: b,
id: hashing.ComputeHash256Array(b),
}
_, err := Codec.Unmarshal(b, msg)
return msg, err
}
// Initialize recalculates the result of Bytes().
func (m *UnsignedMessage) Initialize() error {
bytes, err := Codec.Marshal(CodecVersion, m)
if err != nil {
return fmt.Errorf("couldn't marshal warp unsigned message: %w", err)
}
m.bytes = bytes
m.id = hashing.ComputeHash256Array(m.bytes)
return nil
}
// Bytes returns the binary representation of this message. It assumes that the
// message is initialized from either New, Parse, or an explicit call to
// Initialize.
func (m *UnsignedMessage) Bytes() []byte {
return m.bytes
}
// ID returns an identifier for this message. It assumes that the
// message is initialized from either New, Parse, or an explicit call to
// Initialize.
func (m *UnsignedMessage) ID() ids.ID {
return m.id
}
func (m *UnsignedMessage) String() string {
return fmt.Sprintf("UnsignedMessage(NetworkID = %d, SourceChainID = %s, Payload = %x)", m.NetworkID, m.SourceChainID, m.Payload)
}