You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
278 lines
7.6 KiB
278 lines
7.6 KiB
package types
|
|
|
|
import (
|
|
"bytes"
|
|
"errors"
|
|
"fmt"
|
|
"time"
|
|
|
|
"github.com/tendermint/tendermint/crypto"
|
|
"github.com/tendermint/tendermint/internal/libs/protoio"
|
|
tmbytes "github.com/tendermint/tendermint/libs/bytes"
|
|
tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
|
|
)
|
|
|
|
const (
|
|
nilVoteStr string = "nil-Vote"
|
|
)
|
|
|
|
var (
|
|
ErrVoteUnexpectedStep = errors.New("unexpected step")
|
|
ErrVoteInvalidValidatorIndex = errors.New("invalid validator index")
|
|
ErrVoteInvalidValidatorAddress = errors.New("invalid validator address")
|
|
ErrVoteInvalidSignature = errors.New("invalid signature")
|
|
ErrVoteInvalidBlockHash = errors.New("invalid block hash")
|
|
ErrVoteNonDeterministicSignature = errors.New("non-deterministic signature")
|
|
ErrVoteNil = errors.New("nil vote")
|
|
ErrVoteInvalidExtension = errors.New("invalid vote extension")
|
|
)
|
|
|
|
type ErrVoteConflictingVotes struct {
|
|
VoteA *Vote
|
|
VoteB *Vote
|
|
}
|
|
|
|
func (err *ErrVoteConflictingVotes) Error() string {
|
|
return fmt.Sprintf("conflicting votes from validator %X", err.VoteA.ValidatorAddress)
|
|
}
|
|
|
|
func NewConflictingVoteError(vote1, vote2 *Vote) *ErrVoteConflictingVotes {
|
|
return &ErrVoteConflictingVotes{
|
|
VoteA: vote1,
|
|
VoteB: vote2,
|
|
}
|
|
}
|
|
|
|
// Address is hex bytes.
|
|
type Address = crypto.Address
|
|
|
|
// Vote represents a prevote, precommit, or commit vote from validators for
|
|
// consensus.
|
|
type Vote struct {
|
|
Type tmproto.SignedMsgType `json:"type"`
|
|
Height int64 `json:"height,string"`
|
|
Round int32 `json:"round"` // assume there will not be greater than 2_147_483_647 rounds
|
|
BlockID BlockID `json:"block_id"` // zero if vote is nil.
|
|
Timestamp time.Time `json:"timestamp"`
|
|
ValidatorAddress Address `json:"validator_address"`
|
|
ValidatorIndex int32 `json:"validator_index"`
|
|
Signature []byte `json:"signature"`
|
|
Extension []byte `json:"extension"`
|
|
ExtensionSignature []byte `json:"extension_signature"`
|
|
}
|
|
|
|
// CommitSig converts the Vote to a CommitSig.
|
|
func (vote *Vote) CommitSig() CommitSig {
|
|
if vote == nil {
|
|
return NewCommitSigAbsent()
|
|
}
|
|
|
|
var blockIDFlag BlockIDFlag
|
|
switch {
|
|
case vote.BlockID.IsComplete():
|
|
blockIDFlag = BlockIDFlagCommit
|
|
case vote.BlockID.IsNil():
|
|
blockIDFlag = BlockIDFlagNil
|
|
default:
|
|
panic(fmt.Sprintf("Invalid vote %v - expected BlockID to be either empty or complete", vote))
|
|
}
|
|
|
|
return CommitSig{
|
|
BlockIDFlag: blockIDFlag,
|
|
ValidatorAddress: vote.ValidatorAddress,
|
|
Timestamp: vote.Timestamp,
|
|
Signature: vote.Signature,
|
|
}
|
|
}
|
|
|
|
// VoteSignBytes returns the proto-encoding of the canonicalized Vote, for
|
|
// signing. Panics if the marshaling fails.
|
|
//
|
|
// The encoded Protobuf message is varint length-prefixed (using MarshalDelimited)
|
|
// for backwards-compatibility with the Amino encoding, due to e.g. hardware
|
|
// devices that rely on this encoding.
|
|
//
|
|
// See CanonicalizeVote
|
|
func VoteSignBytes(chainID string, vote *tmproto.Vote) []byte {
|
|
pb := CanonicalizeVote(chainID, vote)
|
|
bz, err := protoio.MarshalDelimited(&pb)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
return bz
|
|
}
|
|
|
|
func (vote *Vote) Copy() *Vote {
|
|
voteCopy := *vote
|
|
return &voteCopy
|
|
}
|
|
|
|
// String returns a string representation of Vote.
|
|
//
|
|
// 1. validator index
|
|
// 2. first 6 bytes of validator address
|
|
// 3. height
|
|
// 4. round,
|
|
// 5. type byte
|
|
// 6. type string
|
|
// 7. first 6 bytes of block hash
|
|
// 8. first 6 bytes of signature
|
|
// 9. first 6 bytes of vote extension
|
|
// 10. timestamp
|
|
func (vote *Vote) String() string {
|
|
if vote == nil {
|
|
return nilVoteStr
|
|
}
|
|
|
|
var typeString string
|
|
switch vote.Type {
|
|
case tmproto.PrevoteType:
|
|
typeString = "Prevote"
|
|
case tmproto.PrecommitType:
|
|
typeString = "Precommit"
|
|
default:
|
|
panic("Unknown vote type")
|
|
}
|
|
|
|
return fmt.Sprintf("Vote{%v:%X %v/%02d/%v(%v) %X %X %X @ %s}",
|
|
vote.ValidatorIndex,
|
|
tmbytes.Fingerprint(vote.ValidatorAddress),
|
|
vote.Height,
|
|
vote.Round,
|
|
vote.Type,
|
|
typeString,
|
|
tmbytes.Fingerprint(vote.BlockID.Hash),
|
|
tmbytes.Fingerprint(vote.Signature),
|
|
tmbytes.Fingerprint(vote.Extension),
|
|
CanonicalTime(vote.Timestamp),
|
|
)
|
|
}
|
|
|
|
func (vote *Vote) Verify(chainID string, pubKey crypto.PubKey) error {
|
|
if !bytes.Equal(pubKey.Address(), vote.ValidatorAddress) {
|
|
return ErrVoteInvalidValidatorAddress
|
|
}
|
|
v := vote.ToProto()
|
|
if !pubKey.VerifySignature(VoteSignBytes(chainID, v), vote.Signature) {
|
|
return ErrVoteInvalidSignature
|
|
}
|
|
if vote.Extension != nil && !pubKey.VerifySignature(vote.Extension, vote.ExtensionSignature) {
|
|
return ErrVoteInvalidSignature
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// ValidateBasic performs basic validation.
|
|
func (vote *Vote) ValidateBasic() error {
|
|
if !IsVoteTypeValid(vote.Type) {
|
|
return errors.New("invalid Type")
|
|
}
|
|
|
|
if vote.Height < 0 {
|
|
return errors.New("negative Height")
|
|
}
|
|
|
|
if vote.Round < 0 {
|
|
return errors.New("negative Round")
|
|
}
|
|
|
|
// NOTE: Timestamp validation is subtle and handled elsewhere.
|
|
|
|
if err := vote.BlockID.ValidateBasic(); err != nil {
|
|
return fmt.Errorf("wrong BlockID: %w", err)
|
|
}
|
|
|
|
// BlockID.ValidateBasic would not err if we for instance have an empty hash but a
|
|
// non-empty PartsSetHeader:
|
|
if !vote.BlockID.IsNil() && !vote.BlockID.IsComplete() {
|
|
return fmt.Errorf("blockID must be either empty or complete, got: %v", vote.BlockID)
|
|
}
|
|
|
|
if len(vote.ValidatorAddress) != crypto.AddressSize {
|
|
return fmt.Errorf("expected ValidatorAddress size to be %d bytes, got %d bytes",
|
|
crypto.AddressSize,
|
|
len(vote.ValidatorAddress),
|
|
)
|
|
}
|
|
if vote.ValidatorIndex < 0 {
|
|
return errors.New("negative ValidatorIndex")
|
|
}
|
|
if len(vote.Signature) == 0 {
|
|
return errors.New("signature is missing")
|
|
}
|
|
|
|
if len(vote.Signature) > MaxSignatureSize {
|
|
return fmt.Errorf("signature is too big (max: %d)", MaxSignatureSize)
|
|
}
|
|
|
|
if len(vote.Extension) > 0 && len(vote.ExtensionSignature) == 0 {
|
|
return errors.New("vote extension signature is missing")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// ToProto converts the handwritten type to proto generated type
|
|
// return type, nil if everything converts safely, otherwise nil, error
|
|
func (vote *Vote) ToProto() *tmproto.Vote {
|
|
if vote == nil {
|
|
return nil
|
|
}
|
|
|
|
return &tmproto.Vote{
|
|
Type: vote.Type,
|
|
Height: vote.Height,
|
|
Round: vote.Round,
|
|
BlockID: vote.BlockID.ToProto(),
|
|
Timestamp: vote.Timestamp,
|
|
ValidatorAddress: vote.ValidatorAddress,
|
|
ValidatorIndex: vote.ValidatorIndex,
|
|
Signature: vote.Signature,
|
|
Extension: vote.Extension,
|
|
ExtensionSignature: vote.ExtensionSignature,
|
|
}
|
|
}
|
|
|
|
func VotesToProto(votes []*Vote) []*tmproto.Vote {
|
|
if votes == nil {
|
|
return nil
|
|
}
|
|
|
|
res := make([]*tmproto.Vote, 0, len(votes))
|
|
for _, vote := range votes {
|
|
v := vote.ToProto()
|
|
// protobuf crashes when serializing "repeated" fields with nil elements
|
|
if v != nil {
|
|
res = append(res, v)
|
|
}
|
|
}
|
|
return res
|
|
}
|
|
|
|
// FromProto converts a proto generetad type to a handwritten type
|
|
// return type, nil if everything converts safely, otherwise nil, error
|
|
func VoteFromProto(pv *tmproto.Vote) (*Vote, error) {
|
|
if pv == nil {
|
|
return nil, errors.New("nil vote")
|
|
}
|
|
|
|
blockID, err := BlockIDFromProto(&pv.BlockID)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
vote := new(Vote)
|
|
vote.Type = pv.Type
|
|
vote.Height = pv.Height
|
|
vote.Round = pv.Round
|
|
vote.BlockID = *blockID
|
|
vote.Timestamp = pv.Timestamp
|
|
vote.ValidatorAddress = pv.ValidatorAddress
|
|
vote.ValidatorIndex = pv.ValidatorIndex
|
|
vote.Signature = pv.Signature
|
|
vote.Extension = pv.Extension
|
|
vote.ExtensionSignature = pv.ExtensionSignature
|
|
|
|
return vote, vote.ValidateBasic()
|
|
}
|