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package types
import (
"errors"
"fmt"
"io"
"github.com/tendermint/tendermint/account"
"github.com/tendermint/tendermint/binary"
. "github.com/tendermint/tendermint/common"
"github.com/tendermint/tendermint/config"
)
var (
ErrVoteUnexpectedStep = errors.New("Unexpected step")
ErrVoteInvalidAccount = errors.New("Invalid round vote account")
ErrVoteInvalidSignature = errors.New("Invalid round vote signature")
ErrVoteInvalidBlockHash = errors.New("Invalid block hash")
)
type ErrVoteConflictingSignature struct {
VoteA *Vote
VoteB *Vote
}
func (err *ErrVoteConflictingSignature) Error() string {
return "Conflicting round vote signature"
}
// Represents a prevote, precommit, or commit vote from validators for consensus.
// Commit votes get aggregated into the next block's Validaiton.
// See the whitepaper for details.
type Vote struct {
Height uint `json:"height"`
Round uint `json:"round"`
Type byte `json:"type"`
BlockHash []byte `json:"block_hash"` // empty if vote is nil.
BlockParts PartSetHeader `json:"block_parts"` // zero if vote is nil.
Signature account.SignatureEd25519 `json:"signature"`
}
// Types of votes
const (
VoteTypePrevote = byte(0x01)
VoteTypePrecommit = byte(0x02)
VoteTypeCommit = byte(0x03)
)
func (vote *Vote) WriteSignBytes(w io.Writer, n *int64, err *error) {
// We hex encode the network name so we don't deal with escaping issues.
binary.WriteTo([]byte(Fmt(`{"network":"%X"`, config.App().GetString("network"))), w, n, err)
binary.WriteTo([]byte(Fmt(`,"vote":{"block_hash":"%X","block_parts":%v`, vote.BlockHash, vote.BlockParts)), w, n, err)
binary.WriteTo([]byte(Fmt(`,"height":%v,"round":%v,"type":%v}}`, vote.Height, vote.Round, vote.Type)), w, n, err)
}
func (vote *Vote) Copy() *Vote {
voteCopy := *vote
return &voteCopy
}
func (vote *Vote) String() string {
var typeString string
switch vote.Type {
case VoteTypePrevote:
typeString = "Prevote"
case VoteTypePrecommit:
typeString = "Precommit"
case VoteTypeCommit:
typeString = "Commit"
default:
panic("Unknown vote type")
}
return fmt.Sprintf("Vote{%v/%02d/%v(%v) %X#%v %v}", vote.Height, vote.Round, vote.Type, typeString, Fingerprint(vote.BlockHash), vote.BlockParts, vote.Signature)
}