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package consensus
import (
"errors"
"fmt"
"github.com/gogo/protobuf/proto"
cstypes "github.com/tendermint/tendermint/consensus/types"
"github.com/tendermint/tendermint/libs/bits"
tmmath "github.com/tendermint/tendermint/libs/math"
"github.com/tendermint/tendermint/p2p"
tmcons "github.com/tendermint/tendermint/proto/tendermint/consensus"
tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
"github.com/tendermint/tendermint/types"
)
// MsgToProto takes a consensus message type and returns the proto defined consensus message
func MsgToProto(msg Message) (*tmcons.Message, error) {
if msg == nil {
return nil, errors.New("consensus: message is nil")
}
var pb tmcons.Message
switch msg := msg.(type) {
case *NewRoundStepMessage:
pb = tmcons.Message{
Sum: &tmcons.Message_NewRoundStep{
NewRoundStep: &tmcons.NewRoundStep{
Height: msg.Height,
Round: msg.Round,
Step: uint32(msg.Step),
SecondsSinceStartTime: msg.SecondsSinceStartTime,
LastCommitRound: msg.LastCommitRound,
},
},
}
case *NewValidBlockMessage:
pbPartSetHeader := msg.BlockPartSetHeader.ToProto()
pbBits := msg.BlockParts.ToProto()
pb = tmcons.Message{
Sum: &tmcons.Message_NewValidBlock{
NewValidBlock: &tmcons.NewValidBlock{
Height: msg.Height,
Round: msg.Round,
BlockPartSetHeader: pbPartSetHeader,
BlockParts: pbBits,
IsCommit: msg.IsCommit,
},
},
}
case *ProposalMessage:
pbP := msg.Proposal.ToProto()
pb = tmcons.Message{
Sum: &tmcons.Message_Proposal{
Proposal: &tmcons.Proposal{
Proposal: *pbP,
},
},
}
case *ProposalPOLMessage:
pbBits := msg.ProposalPOL.ToProto()
pb = tmcons.Message{
Sum: &tmcons.Message_ProposalPol{
ProposalPol: &tmcons.ProposalPOL{
Height: msg.Height,
ProposalPolRound: msg.ProposalPOLRound,
ProposalPol: *pbBits,
},
},
}
case *BlockPartMessage:
parts, err := msg.Part.ToProto()
if err != nil {
return nil, fmt.Errorf("msg to proto error: %w", err)
}
pb = tmcons.Message{
Sum: &tmcons.Message_BlockPart{
BlockPart: &tmcons.BlockPart{
Height: msg.Height,
Round: msg.Round,
Part: *parts,
},
},
}
case *VoteMessage:
vote := msg.Vote.ToProto()
pb = tmcons.Message{
Sum: &tmcons.Message_Vote{
Vote: &tmcons.Vote{
Vote: vote,
},
},
}
case *HasVoteMessage:
pb = tmcons.Message{
Sum: &tmcons.Message_HasVote{
HasVote: &tmcons.HasVote{
Height: msg.Height,
Round: msg.Round,
Type: msg.Type,
Index: msg.Index,
},
},
}
case *VoteSetMaj23Message:
bi := msg.BlockID.ToProto()
pb = tmcons.Message{
Sum: &tmcons.Message_VoteSetMaj23{
VoteSetMaj23: &tmcons.VoteSetMaj23{
Height: msg.Height,
Round: msg.Round,
Type: msg.Type,
BlockID: bi,
},
},
}
case *VoteSetBitsMessage:
bi := msg.BlockID.ToProto()
bits := msg.Votes.ToProto()
vsb := &tmcons.Message_VoteSetBits{
VoteSetBits: &tmcons.VoteSetBits{
Height: msg.Height,
Round: msg.Round,
Type: msg.Type,
BlockID: bi,
},
}
if bits != nil {
vsb.VoteSetBits.Votes = *bits
}
pb = tmcons.Message{
Sum: vsb,
}
default:
return nil, fmt.Errorf("consensus: message not recognized: %T", msg)
}
return &pb, nil
}
// MsgFromProto takes a consensus proto message and returns the native go type
func MsgFromProto(msg *tmcons.Message) (Message, error) {
if msg == nil {
return nil, errors.New("consensus: nil message")
}
var pb Message
switch msg := msg.Sum.(type) {
case *tmcons.Message_NewRoundStep:
rs, err := tmmath.SafeConvertUint8(int64(msg.NewRoundStep.Step))
// deny message based on possible overflow
if err != nil {
return nil, fmt.Errorf("denying message due to possible overflow: %w", err)
}
pb = &NewRoundStepMessage{
Height: msg.NewRoundStep.Height,
Round: msg.NewRoundStep.Round,
Step: cstypes.RoundStepType(rs),
SecondsSinceStartTime: msg.NewRoundStep.SecondsSinceStartTime,
LastCommitRound: msg.NewRoundStep.LastCommitRound,
}
case *tmcons.Message_NewValidBlock:
pbPartSetHeader, err := types.PartSetHeaderFromProto(&msg.NewValidBlock.BlockPartSetHeader)
if err != nil {
return nil, fmt.Errorf("parts header to proto error: %w", err)
}
pbBits := new(bits.BitArray)
err = pbBits.FromProto(msg.NewValidBlock.BlockParts)
if err != nil {
return nil, fmt.Errorf("parts to proto error: %w", err)
}
pb = &NewValidBlockMessage{
Height: msg.NewValidBlock.Height,
Round: msg.NewValidBlock.Round,
BlockPartSetHeader: *pbPartSetHeader,
BlockParts: pbBits,
IsCommit: msg.NewValidBlock.IsCommit,
}
case *tmcons.Message_Proposal:
pbP, err := types.ProposalFromProto(&msg.Proposal.Proposal)
if err != nil {
return nil, fmt.Errorf("proposal msg to proto error: %w", err)
}
pb = &ProposalMessage{
Proposal: pbP,
}
case *tmcons.Message_ProposalPol:
pbBits := new(bits.BitArray)
err := pbBits.FromProto(&msg.ProposalPol.ProposalPol)
if err != nil {
return nil, fmt.Errorf("proposal PoL to proto error: %w", err)
}
pb = &ProposalPOLMessage{
Height: msg.ProposalPol.Height,
ProposalPOLRound: msg.ProposalPol.ProposalPolRound,
ProposalPOL: pbBits,
}
case *tmcons.Message_BlockPart:
parts, err := types.PartFromProto(&msg.BlockPart.Part)
if err != nil {
return nil, fmt.Errorf("blockpart msg to proto error: %w", err)
}
pb = &BlockPartMessage{
Height: msg.BlockPart.Height,
Round: msg.BlockPart.Round,
Part: parts,
}
case *tmcons.Message_Vote:
vote, err := types.VoteFromProto(msg.Vote.Vote)
if err != nil {
return nil, fmt.Errorf("vote msg to proto error: %w", err)
}
pb = &VoteMessage{
Vote: vote,
}
case *tmcons.Message_HasVote:
pb = &HasVoteMessage{
Height: msg.HasVote.Height,
Round: msg.HasVote.Round,
Type: msg.HasVote.Type,
Index: msg.HasVote.Index,
}
case *tmcons.Message_VoteSetMaj23:
bi, err := types.BlockIDFromProto(&msg.VoteSetMaj23.BlockID)
if err != nil {
return nil, fmt.Errorf("voteSetMaj23 msg to proto error: %w", err)
}
pb = &VoteSetMaj23Message{
Height: msg.VoteSetMaj23.Height,
Round: msg.VoteSetMaj23.Round,
Type: msg.VoteSetMaj23.Type,
BlockID: *bi,
}
case *tmcons.Message_VoteSetBits:
bi, err := types.BlockIDFromProto(&msg.VoteSetBits.BlockID)
if err != nil {
return nil, fmt.Errorf("block ID msg to proto error: %w", err)
}
bits := new(bits.BitArray)
err = bits.FromProto(&msg.VoteSetBits.Votes)
if err != nil {
return nil, fmt.Errorf("votes to proto error: %w", err)
}
pb = &VoteSetBitsMessage{
Height: msg.VoteSetBits.Height,
Round: msg.VoteSetBits.Round,
Type: msg.VoteSetBits.Type,
BlockID: *bi,
Votes: bits,
}
default:
return nil, fmt.Errorf("consensus: message not recognized: %T", msg)
}
if err := pb.ValidateBasic(); err != nil {
return nil, err
}
return pb, nil
}
// MustEncode takes the reactors msg, makes it proto and marshals it
// this mimics `MustMarshalBinaryBare` in that is panics on error
func MustEncode(msg Message) []byte {
pb, err := MsgToProto(msg)
if err != nil {
panic(err)
}
enc, err := proto.Marshal(pb)
if err != nil {
panic(err)
}
return enc
}
// WALToProto takes a WAL message and return a proto walMessage and error
func WALToProto(msg WALMessage) (*tmcons.WALMessage, error) {
var pb tmcons.WALMessage
switch msg := msg.(type) {
case types.EventDataRoundState:
pb = tmcons.WALMessage{
Sum: &tmcons.WALMessage_EventDataRoundState{
EventDataRoundState: &tmproto.EventDataRoundState{
Height: msg.Height,
Round: msg.Round,
Step: msg.Step,
},
},
}
case msgInfo:
consMsg, err := MsgToProto(msg.Msg)
if err != nil {
return nil, err
}
pb = tmcons.WALMessage{
Sum: &tmcons.WALMessage_MsgInfo{
MsgInfo: &tmcons.MsgInfo{
Msg: *consMsg,
PeerID: string(msg.PeerID),
},
},
}
case timeoutInfo:
pb = tmcons.WALMessage{
Sum: &tmcons.WALMessage_TimeoutInfo{
TimeoutInfo: &tmcons.TimeoutInfo{
Duration: msg.Duration,
Height: msg.Height,
Round: msg.Round,
Step: uint32(msg.Step),
},
},
}
case EndHeightMessage:
pb = tmcons.WALMessage{
Sum: &tmcons.WALMessage_EndHeight{
EndHeight: &tmcons.EndHeight{
Height: msg.Height,
},
},
}
default:
return nil, fmt.Errorf("to proto: wal message not recognized: %T", msg)
}
return &pb, nil
}
// WALFromProto takes a proto wal message and return a consensus walMessage and error
func WALFromProto(msg *tmcons.WALMessage) (WALMessage, error) {
if msg == nil {
return nil, errors.New("nil WAL message")
}
var pb WALMessage
switch msg := msg.Sum.(type) {
case *tmcons.WALMessage_EventDataRoundState:
pb = types.EventDataRoundState{
Height: msg.EventDataRoundState.Height,
Round: msg.EventDataRoundState.Round,
Step: msg.EventDataRoundState.Step,
}
case *tmcons.WALMessage_MsgInfo:
walMsg, err := MsgFromProto(&msg.MsgInfo.Msg)
if err != nil {
return nil, fmt.Errorf("msgInfo from proto error: %w", err)
}
pb = msgInfo{
Msg: walMsg,
PeerID: p2p.NodeID(msg.MsgInfo.PeerID),
}
case *tmcons.WALMessage_TimeoutInfo:
tis, err := tmmath.SafeConvertUint8(int64(msg.TimeoutInfo.Step))
// deny message based on possible overflow
if err != nil {
return nil, fmt.Errorf("denying message due to possible overflow: %w", err)
}
pb = timeoutInfo{
Duration: msg.TimeoutInfo.Duration,
Height: msg.TimeoutInfo.Height,
Round: msg.TimeoutInfo.Round,
Step: cstypes.RoundStepType(tis),
}
return pb, nil
case *tmcons.WALMessage_EndHeight:
pb := EndHeightMessage{
Height: msg.EndHeight.Height,
}
return pb, nil
default:
return nil, fmt.Errorf("from proto: wal message not recognized: %T", msg)
}
return pb, nil
}