block.go
package types
import (
"bytes"
"errors"
"fmt"
"strings"
"time"
"github.com/gogo/protobuf/proto"
gogotypes "github.com/gogo/protobuf/types"
"github.com/tendermint/tendermint/crypto"
"github.com/tendermint/tendermint/crypto/merkle"
"github.com/tendermint/tendermint/crypto/tmhash"
"github.com/tendermint/tendermint/libs/bits"
tmbytes "github.com/tendermint/tendermint/libs/bytes"
tmmath "github.com/tendermint/tendermint/libs/math"
tmsync "github.com/tendermint/tendermint/libs/sync"
tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
tmversion "github.com/tendermint/tendermint/proto/tendermint/version"
"github.com/tendermint/tendermint/version"
)
const (
// MaxHeaderBytes is a maximum header size.
// NOTE: Because app hash can be of arbitrary size, the header is therefore not
// capped in size and thus this number should be seen as a soft max
MaxHeaderBytes int64 = 626
// MaxOverheadForBlock - maximum overhead to encode a block (up to
// MaxBlockSizeBytes in size) not including it's parts except Data.
// This means it also excludes the overhead for individual transactions.
//
// Uvarint length of MaxBlockSizeBytes: 4 bytes
// 2 fields (2 embedded): 2 bytes
// Uvarint length of Data.Txs: 4 bytes
// Data.Txs field: 1 byte
MaxOverheadForBlock int64 = 11
)
// Block defines the atomic unit of a Tendermint blockchain.
type Block struct {
mtx tmsync.Mutex
Header `json:"header"`
Data `json:"data"`
Evidence EvidenceData `json:"evidence"`
LastCommit *Commit `json:"last_commit"`
}
// ValidateBasic performs basic validation that doesn't involve state data.
// It checks the internal consistency of the block.
// Further validation is done using state#ValidateBlock.
func (b *Block) ValidateBasic() error {
if b == nil {
return errors.New("nil block")
}
b.mtx.Lock()
defer b.mtx.Unlock()
if err := b.Header.ValidateBasic(); err != nil {
return fmt.Errorf("invalid header: %w", err)
}
// Validate the last commit and its hash.
if b.LastCommit == nil {
return errors.New("nil LastCommit")
}
if err := b.LastCommit.ValidateBasic(); err != nil {
return fmt.Errorf("wrong LastCommit: %v", err)
}
if !bytes.Equal(b.LastCommitHash, b.LastCommit.Hash()) {
return fmt.Errorf("wrong Header.LastCommitHash. Expected %v, got %v",
b.LastCommit.Hash(),
b.LastCommitHash,
)
}
// NOTE: b.Data.Txs may be nil, but b.Data.Hash() still works fine.
if !bytes.Equal(b.DataHash, b.Data.Hash()) {
return fmt.Errorf(
"wrong Header.DataHash. Expected %v, got %v",
b.Data.Hash(),
b.DataHash,
)
}
// NOTE: b.Evidence.Evidence may be nil, but we're just looping.
for i, ev := range b.Evidence.Evidence {
if err := ev.ValidateBasic(); err != nil {
return fmt.Errorf("invalid evidence (#%d): %v", i, err)
}
}
if !bytes.Equal(b.EvidenceHash, b.Evidence.Hash()) {
return fmt.Errorf("wrong Header.EvidenceHash. Expected %v, got %v",
b.EvidenceHash,
b.Evidence.Hash(),
)
}
return nil
}
// fillHeader fills in any remaining header fields that are a function of the block data
func (b *Block) fillHeader() {
if b.LastCommitHash == nil {
b.LastCommitHash = b.LastCommit.Hash()
}
if b.DataHash == nil {
b.DataHash = b.Data.Hash()
}
if b.EvidenceHash == nil {
b.EvidenceHash = b.Evidence.Hash()
}
}
// Hash computes and returns the block hash.
// If the block is incomplete, block hash is nil for safety.
func (b *Block) Hash() tmbytes.HexBytes {
if b == nil {
return nil
}
b.mtx.Lock()
defer b.mtx.Unlock()
if b.LastCommit == nil {
return nil
}
b.fillHeader()
return b.Header.Hash()
}
// MakePartSet returns a PartSet containing parts of a serialized block.
// This is the form in which the block is gossipped to peers.
// CONTRACT: partSize is greater than zero.
func (b *Block) MakePartSet(partSize uint32) *PartSet {
if b == nil {
return nil
}
b.mtx.Lock()
defer b.mtx.Unlock()
pbb, err := b.ToProto()
if err != nil {
panic(err)
}
bz, err := proto.Marshal(pbb)
if err != nil {
panic(err)
}
return NewPartSetFromData(bz, partSize)
}
// HashesTo is a convenience function that checks if a block hashes to the given argument.
// Returns false if the block is nil or the hash is empty.
func (b *Block) HashesTo(hash []byte) bool {
if len(hash) == 0 {
return false
}
if b == nil {
return false
}
return bytes.Equal(b.Hash(), hash)
}
// Size returns size of the block in bytes.
func (b *Block) Size() int {
pbb, err := b.ToProto()
if err != nil {
return 0
}
return pbb.Size()
}
// String returns a string representation of the block
//
// See StringIndented.
func (b *Block) String() string {
return b.StringIndented("")
}
// StringIndented returns an indented String.
//
// Header
// Data
// Evidence
// LastCommit
// Hash
func (b *Block) StringIndented(indent string) string {
if b == nil {
return "nil-Block"
}
return fmt.Sprintf(`Block{
%s %v
%s %v
%s %v
%s %v
%s}#%v`,
indent, b.Header.StringIndented(indent+" "),
indent, b.Data.StringIndented(indent+" "),
indent, b.Evidence.StringIndented(indent+" "),
indent, b.LastCommit.StringIndented(indent+" "),
indent, b.Hash())
}
// StringShort returns a shortened string representation of the block.
func (b *Block) StringShort() string {
if b == nil {
return "nil-Block"
}
return fmt.Sprintf("Block#%X", b.Hash())
}
// ToProto converts Block to protobuf
func (b *Block) ToProto() (*tmproto.Block, error) {
if b == nil {
return nil, errors.New("nil Block")
}
pb := new(tmproto.Block)
pb.Header = *b.Header.ToProto()
pb.LastCommit = b.LastCommit.ToProto()
pb.Data = b.Data.ToProto()
protoEvidence, err := b.Evidence.ToProto()
if err != nil {
return nil, err
}
pb.Evidence = *protoEvidence
return pb, nil
}
// FromProto sets a protobuf Block to the given pointer.
// It returns an error if the block is invalid.
func BlockFromProto(bp *tmproto.Block) (*Block, error) {
if bp == nil {
return nil, errors.New("nil block")
}
b := new(Block)
h, err := HeaderFromProto(&bp.Header)
if err != nil {
return nil, err
}
b.Header = h
data, err := DataFromProto(&bp.Data)
if err != nil {
return nil, err
}
b.Data = data
if err := b.Evidence.FromProto(&bp.Evidence); err != nil {
return nil, err
}
if bp.LastCommit != nil {
lc, err := CommitFromProto(bp.LastCommit)
if err != nil {
return nil, err
}
b.LastCommit = lc
}
return b, b.ValidateBasic()
}
//-----------------------------------------------------------------------------
// MaxDataBytes returns the maximum size of block's data.
//
// XXX: Panics on negative result.
func MaxDataBytes(maxBytes, evidenceBytes int64, valsCount int) int64 {
maxDataBytes := maxBytes -
MaxOverheadForBlock -
MaxHeaderBytes -
MaxCommitBytes(valsCount) -
evidenceBytes
if maxDataBytes < 0 {
panic(fmt.Sprintf(
"Negative MaxDataBytes. Block.MaxBytes=%d is too small to accommodate header&lastCommit&evidence=%d",
maxBytes,
-(maxDataBytes - maxBytes),
))
}
return maxDataBytes
}
// MaxDataBytesNoEvidence returns the maximum size of block's data when
// evidence count is unknown. MaxEvidencePerBlock will be used for the size
// of evidence.
//
// XXX: Panics on negative result.
func MaxDataBytesNoEvidence(maxBytes int64, valsCount int) int64 {
maxDataBytes := maxBytes -
MaxOverheadForBlock -
MaxHeaderBytes -
MaxCommitBytes(valsCount)
if maxDataBytes < 0 {
panic(fmt.Sprintf(
"Negative MaxDataBytesUnknownEvidence. Block.MaxBytes=%d is too small to accommodate header&lastCommit&evidence=%d",
maxBytes,
-(maxDataBytes - maxBytes),
))
}
return maxDataBytes
}
//-----------------------------------------------------------------------------
// Header defines the structure of a Tendermint block header.
// NOTE: changes to the Header should be duplicated in:
// - header.Hash()
// - abci.Header
// - https://github.com/tendermint/tendermint/blob/v0.34.x/spec/blockchain/blockchain.md
type Header struct {
// basic block info
Version tmversion.Consensus `json:"version"`
ChainID string `json:"chain_id"`
Height int64 `json:"height"`
Time time.Time `json:"time"`
// prev block info
LastBlockID BlockID `json:"last_block_id"`
// hashes of block data
LastCommitHash tmbytes.HexBytes `json:"last_commit_hash"` // commit from validators from the last block
DataHash tmbytes.HexBytes `json:"data_hash"` // transactions
// hashes from the app output from the prev block
ValidatorsHash tmbytes.HexBytes `json:"validators_hash"` // validators for the current block
NextValidatorsHash tmbytes.HexBytes `json:"next_validators_hash"` // validators for the next block
ConsensusHash tmbytes.HexBytes `json:"consensus_hash"` // consensus params for current block
AppHash tmbytes.HexBytes `json:"app_hash"` // state after txs from the previous block
// root hash of all results from the txs from the previous block
// see `deterministicResponseDeliverTx` to understand which parts of a tx is hashed into here
LastResultsHash tmbytes.HexBytes `json:"last_results_hash"`
// consensus info
EvidenceHash tmbytes.HexBytes `json:"evidence_hash"` // evidence included in the block
ProposerAddress Address `json:"proposer_address"` // original proposer of the block
}
// Populate the Header with state-derived data.
// Call this after MakeBlock to complete the Header.
func (h *Header) Populate(
version tmversion.Consensus, chainID string,
timestamp time.Time, lastBlockID BlockID,
valHash, nextValHash []byte,
consensusHash, appHash, lastResultsHash []byte,
proposerAddress Address,
) {
h.Version = version
h.ChainID = chainID
h.Time = timestamp
h.LastBlockID = lastBlockID
h.ValidatorsHash = valHash
h.NextValidatorsHash = nextValHash
h.ConsensusHash = consensusHash
h.AppHash = appHash
h.LastResultsHash = lastResultsHash
h.ProposerAddress = proposerAddress
}
// ValidateBasic performs stateless validation on a Header returning an error
// if any validation fails.
//
// NOTE: Timestamp validation is subtle and handled elsewhere.
func (h Header) ValidateBasic() error {
if h.Version.Block != version.BlockProtocol {
return fmt.Errorf("block protocol is incorrect: got: %d, want: %d ", h.Version.Block, version.BlockProtocol)
}
if len(h.ChainID) > MaxChainIDLen {
return fmt.Errorf("chainID is too long; got: %d, max: %d", len(h.ChainID), MaxChainIDLen)
}
if h.Height < 0 {
return errors.New("negative Height")
} else if h.Height == 0 {
return errors.New("zero Height")
}
if err := h.LastBlockID.ValidateBasic(); err != nil {
return fmt.Errorf("wrong LastBlockID: %w", err)
}
if err := ValidateHash(h.LastCommitHash); err != nil {
return fmt.Errorf("wrong LastCommitHash: %v", err)
}
if err := ValidateHash(h.DataHash); err != nil {
return fmt.Errorf("wrong DataHash: %v", err)
}
if err := ValidateHash(h.EvidenceHash); err != nil {
return fmt.Errorf("wrong EvidenceHash: %v", err)
}
if len(h.ProposerAddress) != crypto.AddressSize {
return fmt.Errorf(
"invalid ProposerAddress length; got: %d, expected: %d",
len(h.ProposerAddress), crypto.AddressSize,
)
}
// Basic validation of hashes related to application data.
// Will validate fully against state in state#ValidateBlock.
if err := ValidateHash(h.ValidatorsHash); err != nil {
return fmt.Errorf("wrong ValidatorsHash: %v", err)
}
if err := ValidateHash(h.NextValidatorsHash); err != nil {
return fmt.Errorf("wrong NextValidatorsHash: %v", err)
}
if err := ValidateHash(h.ConsensusHash); err != nil {
return fmt.Errorf("wrong ConsensusHash: %v", err)
}
// NOTE: AppHash is arbitrary length
if err := ValidateHash(h.LastResultsHash); err != nil {
return fmt.Errorf("wrong LastResultsHash: %v", err)
}
return nil
}
// Hash returns the hash of the header.
// It computes a Merkle tree from the header fields
// ordered as they appear in the Header.
// Returns nil if ValidatorHash is missing,
// since a Header is not valid unless there is
// a ValidatorsHash (corresponding to the validator set).
func (h *Header) Hash() tmbytes.HexBytes {
if h == nil || len(h.ValidatorsHash) == 0 {
return nil
}
hbz, err := h.Version.Marshal()
if err != nil {
return nil
}
pbt, err := gogotypes.StdTimeMarshal(h.Time)
if err != nil {
return nil
}
pbbi := h.LastBlockID.ToProto()
bzbi, err := pbbi.Marshal()
if err != nil {
return nil
}
return merkle.HashFromByteSlices([][]byte{
hbz,
cdcEncode(h.ChainID),
cdcEncode(h.Height),
pbt,
bzbi,
cdcEncode(h.LastCommitHash),
cdcEncode(h.DataHash),
cdcEncode(h.ValidatorsHash),
cdcEncode(h.NextValidatorsHash),
cdcEncode(h.ConsensusHash),
cdcEncode(h.AppHash),
cdcEncode(h.LastResultsHash),
cdcEncode(h.EvidenceHash),
cdcEncode(h.ProposerAddress),
})
}
// StringIndented returns an indented string representation of the header.
func (h *Header) StringIndented(indent string) string {
if h == nil {
return "nil-Header"
}
return fmt.Sprintf(`Header{
%s Version: %v
%s ChainID: %v
%s Height: %v
%s Time: %v
%s LastBlockID: %v
%s LastCommit: %v
%s Data: %v
%s Validators: %v
%s NextValidators: %v
%s App: %v
%s Consensus: %v
%s Results: %v
%s Evidence: %v
%s Proposer: %v
%s}#%v`,
indent, h.Version,
indent, h.ChainID,
indent, h.Height,
indent, h.Time,
indent, h.LastBlockID,
indent, h.LastCommitHash,
indent, h.DataHash,
indent, h.ValidatorsHash,
indent, h.NextValidatorsHash,
indent, h.AppHash,
indent, h.ConsensusHash,
indent, h.LastResultsHash,
indent, h.EvidenceHash,
indent, h.ProposerAddress,
indent, h.Hash())
}
// ToProto converts Header to protobuf
func (h *Header) ToProto() *tmproto.Header {
if h == nil {
return nil
}
return &tmproto.Header{
Version: h.Version,
ChainID: h.ChainID,
Height: h.Height,
Time: h.Time,
LastBlockId: h.LastBlockID.ToProto(),
ValidatorsHash: h.ValidatorsHash,
NextValidatorsHash: h.NextValidatorsHash,
ConsensusHash: h.ConsensusHash,
AppHash: h.AppHash,
DataHash: h.DataHash,
EvidenceHash: h.EvidenceHash,
LastResultsHash: h.LastResultsHash,
LastCommitHash: h.LastCommitHash,
ProposerAddress: h.ProposerAddress,
}
}
// FromProto sets a protobuf Header to the given pointer.
// It returns an error if the header is invalid.
func HeaderFromProto(ph *tmproto.Header) (Header, error) {
if ph == nil {
return Header{}, errors.New("nil Header")
}
h := new(Header)
bi, err := BlockIDFromProto(&ph.LastBlockId)
if err != nil {
return Header{}, err
}
h.Version = ph.Version
h.ChainID = ph.ChainID
h.Height = ph.Height
h.Time = ph.Time
h.Height = ph.Height
h.LastBlockID = *bi
h.ValidatorsHash = ph.ValidatorsHash
h.NextValidatorsHash = ph.NextValidatorsHash
h.ConsensusHash = ph.ConsensusHash
h.AppHash = ph.AppHash
h.DataHash = ph.DataHash
h.EvidenceHash = ph.EvidenceHash
h.LastResultsHash = ph.LastResultsHash
h.LastCommitHash = ph.LastCommitHash
h.ProposerAddress = ph.ProposerAddress
return *h, h.ValidateBasic()
}
//-------------------------------------
// BlockIDFlag indicates which BlockID the signature is for.
type BlockIDFlag byte
const (
// BlockIDFlagAbsent - no vote was received from a validator.
BlockIDFlagAbsent BlockIDFlag = iota + 1
// BlockIDFlagCommit - voted for the Commit.BlockID.
BlockIDFlagCommit
// BlockIDFlagNil - voted for nil.
BlockIDFlagNil
)
const (
// Max size of commit without any commitSigs -> 82 for BlockID, 8 for Height, 4 for Round.
MaxCommitOverheadBytes int64 = 94
// Commit sig size is made up of 64 bytes for the signature, 20 bytes for the address,
// 1 byte for the flag and 14 bytes for the timestamp
MaxCommitSigBytes int64 = 109
)
// CommitSig is a part of the Vote included in a Commit.
type CommitSig struct {
BlockIDFlag BlockIDFlag `json:"block_id_flag"`
ValidatorAddress Address `json:"validator_address"`
Timestamp time.Time `json:"timestamp"`
Signature []byte `json:"signature"`
}
// NewCommitSigForBlock returns new CommitSig with BlockIDFlagCommit.
func NewCommitSigForBlock(signature []byte, valAddr Address, ts time.Time) CommitSig {
return CommitSig{
BlockIDFlag: BlockIDFlagCommit,
ValidatorAddress: valAddr,
Timestamp: ts,
Signature: signature,
}
}
func MaxCommitBytes(valCount int) int64 {
// From the repeated commit sig field
var protoEncodingOverhead int64 = 2
return MaxCommitOverheadBytes + ((MaxCommitSigBytes + protoEncodingOverhead) * int64(valCount))
}
// NewCommitSigAbsent returns new CommitSig with BlockIDFlagAbsent. Other
// fields are all empty.
func NewCommitSigAbsent() CommitSig {
return CommitSig{
BlockIDFlag: BlockIDFlagAbsent,
}
}
// ForBlock returns true if CommitSig is for the block.
func (cs CommitSig) ForBlock() bool {
return cs.BlockIDFlag == BlockIDFlagCommit
}
// Absent returns true if CommitSig is absent.
func (cs CommitSig) Absent() bool {
return cs.BlockIDFlag == BlockIDFlagAbsent
}
// CommitSig returns a string representation of CommitSig.
//
// 1. first 6 bytes of signature
// 2. first 6 bytes of validator address
// 3. block ID flag
// 4. timestamp
func (cs CommitSig) String() string {
return fmt.Sprintf("CommitSig{%X by %X on %v @ %s}",
tmbytes.Fingerprint(cs.Signature),
tmbytes.Fingerprint(cs.ValidatorAddress),
cs.BlockIDFlag,
CanonicalTime(cs.Timestamp))
}
// BlockID returns the Commit's BlockID if CommitSig indicates signing,
// otherwise - empty BlockID.
func (cs CommitSig) BlockID(commitBlockID BlockID) BlockID {
var blockID BlockID
switch cs.BlockIDFlag {
case BlockIDFlagAbsent:
blockID = BlockID{}
case BlockIDFlagCommit:
blockID = commitBlockID
case BlockIDFlagNil:
blockID = BlockID{}
default:
panic(fmt.Sprintf("Unknown BlockIDFlag: %v", cs.BlockIDFlag))
}
return blockID
}
// ValidateBasic performs basic validation.
func (cs CommitSig) ValidateBasic() error {
switch cs.BlockIDFlag {
case BlockIDFlagAbsent:
case BlockIDFlagCommit:
case BlockIDFlagNil:
default:
return fmt.Errorf("unknown BlockIDFlag: %v", cs.BlockIDFlag)
}
switch cs.BlockIDFlag {
case BlockIDFlagAbsent:
if len(cs.ValidatorAddress) != 0 {
return errors.New("validator address is present")
}
if !cs.Timestamp.IsZero() {
return errors.New("time is present")
}
if len(cs.Signature) != 0 {
return errors.New("signature is present")
}
default:
if len(cs.ValidatorAddress) != crypto.AddressSize {
return fmt.Errorf("expected ValidatorAddress size to be %d bytes, got %d bytes",
crypto.AddressSize,
len(cs.ValidatorAddress),
)
}
// NOTE: Timestamp validation is subtle and handled elsewhere.
if len(cs.Signature) == 0 {
return errors.New("signature is missing")
}
if len(cs.Signature) > MaxSignatureSize {
return fmt.Errorf("signature is too big (max: %d)", MaxSignatureSize)
}
}
return nil
}
// ToProto converts CommitSig to protobuf
func (cs *CommitSig) ToProto() *tmproto.CommitSig {
if cs == nil {
return nil
}
return &tmproto.CommitSig{
BlockIdFlag: tmproto.BlockIDFlag(cs.BlockIDFlag),
ValidatorAddress: cs.ValidatorAddress,
Timestamp: cs.Timestamp,
Signature: cs.Signature,
}
}
// FromProto sets a protobuf CommitSig to the given pointer.
// It returns an error if the CommitSig is invalid.
func (cs *CommitSig) FromProto(csp tmproto.CommitSig) error {
cs.BlockIDFlag = BlockIDFlag(csp.BlockIdFlag)
cs.ValidatorAddress = csp.ValidatorAddress
cs.Timestamp = csp.Timestamp
cs.Signature = csp.Signature
return cs.ValidateBasic()
}
//-------------------------------------
// Commit contains the evidence that a block was committed by a set of validators.
// NOTE: Commit is empty for height 1, but never nil.
type Commit struct {
// NOTE: The signatures are in order of address to preserve the bonded
// ValidatorSet order.
// Any peer with a block can gossip signatures by index with a peer without
// recalculating the active ValidatorSet.
Height int64 `json:"height"`
Round int32 `json:"round"`
BlockID BlockID `json:"block_id"`
Signatures []CommitSig `json:"signatures"`
// Memoized in first call to corresponding method.
// NOTE: can't memoize in constructor because constructor isn't used for
// unmarshaling.
hash tmbytes.HexBytes
bitArray *bits.BitArray
}
// NewCommit returns a new Commit.
func NewCommit(height int64, round int32, blockID BlockID, commitSigs []CommitSig) *Commit {
return &Commit{
Height: height,
Round: round,
BlockID: blockID,
Signatures: commitSigs,
}
}
// CommitToVoteSet constructs a VoteSet from the Commit and validator set.
// Panics if signatures from the commit can't be added to the voteset.
// Inverse of VoteSet.MakeCommit().
func CommitToVoteSet(chainID string, commit *Commit, vals *ValidatorSet) *VoteSet {
voteSet := NewVoteSet(chainID, commit.Height, commit.Round, tmproto.PrecommitType, vals)
for idx, commitSig := range commit.Signatures {
if commitSig.Absent() {
continue // OK, some precommits can be missing.
}
added, err := voteSet.AddVote(commit.GetVote(int32(idx)))
if !added || err != nil {
panic(fmt.Sprintf("Failed to reconstruct LastCommit: %v", err))
}
}
return voteSet
}
// GetVote converts the CommitSig for the given valIdx to a Vote.
// Returns nil if the precommit at valIdx is nil.
// Panics if valIdx >= commit.Size().
func (commit *Commit) GetVote(valIdx int32) *Vote {
commitSig := commit.Signatures[valIdx]
return &Vote{
Type: tmproto.PrecommitType,
Height: commit.Height,
Round: commit.Round,
BlockID: commitSig.BlockID(commit.BlockID),
Timestamp: commitSig.Timestamp,
ValidatorAddress: commitSig.ValidatorAddress,
ValidatorIndex: valIdx,
Signature: commitSig.Signature,
}
}
// VoteSignBytes returns the bytes of the Vote corresponding to valIdx for
// signing.
//
// The only unique part is the Timestamp - all other fields signed over are
// otherwise the same for all validators.
//
// Panics if valIdx >= commit.Size().
//
// See VoteSignBytes
func (commit *Commit) VoteSignBytes(chainID string, valIdx int32) []byte {
v := commit.GetVote(valIdx).ToProto()
return VoteSignBytes(chainID, v)
}
// Type returns the vote type of the commit, which is always VoteTypePrecommit
// Implements VoteSetReader.
func (commit *Commit) Type() byte {
return byte(tmproto.PrecommitType)
}
// GetHeight returns height of the commit.
// Implements VoteSetReader.
func (commit *Commit) GetHeight() int64 {
return commit.Height
}
// GetRound returns height of the commit.
// Implements VoteSetReader.
func (commit *Commit) GetRound() int32 {
return commit.Round
}
// Size returns the number of signatures in the commit.
// Implements VoteSetReader.
func (commit *Commit) Size() int {
if commit == nil {
return 0
}
return len(commit.Signatures)
}
// BitArray returns a BitArray of which validators voted for BlockID or nil in this commit.
// Implements VoteSetReader.
func (commit *Commit) BitArray() *bits.BitArray {
if commit.bitArray == nil {
commit.bitArray = bits.NewBitArray(len(commit.Signatures))
for i, commitSig := range commit.Signatures {
// TODO: need to check the BlockID otherwise we could be counting conflicts,
// not just the one with +2/3 !
commit.bitArray.SetIndex(i, !commitSig.Absent())
}
}
return commit.bitArray
}
// GetByIndex returns the vote corresponding to a given validator index.
// Panics if `index >= commit.Size()`.
// Implements VoteSetReader.
func (commit *Commit) GetByIndex(valIdx int32) *Vote {
return commit.GetVote(valIdx)
}
// IsCommit returns true if there is at least one signature.
// Implements VoteSetReader.
func (commit *Commit) IsCommit() bool {
return len(commit.Signatures) != 0
}
// ValidateBasic performs basic validation that doesn't involve state data.
// Does not actually check the cryptographic signatures.
func (commit *Commit) ValidateBasic() error {
if commit.Height < 0 {
return errors.New("negative Height")
}
if commit.Round < 0 {
return errors.New("negative Round")
}
if commit.Height >= 1 {
if commit.BlockID.IsZero() {
return errors.New("commit cannot be for nil block")
}
if len(commit.Signatures) == 0 {
return errors.New("no signatures in commit")
}
for i, commitSig := range commit.Signatures {
if err := commitSig.ValidateBasic(); err != nil {
return fmt.Errorf("wrong CommitSig #%d: %v", i, err)
}
}
}
return nil
}
// Hash returns the hash of the commit
func (commit *Commit) Hash() tmbytes.HexBytes {
if commit == nil {
return nil
}
if commit.hash == nil {
bs := make([][]byte, len(commit.Signatures))
for i, commitSig := range commit.Signatures {
pbcs := commitSig.ToProto()
bz, err := pbcs.Marshal()
if err != nil {
panic(err)
}
bs[i] = bz
}
commit.hash = merkle.HashFromByteSlices(bs)
}
return commit.hash
}
// StringIndented returns a string representation of the commit.
func (commit *Commit) StringIndented(indent string) string {
if commit == nil {
return "nil-Commit"
}
commitSigStrings := make([]string, len(commit.Signatures))
for i, commitSig := range commit.Signatures {
commitSigStrings[i] = commitSig.String()
}
return fmt.Sprintf(`Commit{
%s Height: %d
%s Round: %d
%s BlockID: %v
%s Signatures:
%s %v
%s}#%v`,
indent, commit.Height,
indent, commit.Round,
indent, commit.BlockID,
indent,
indent, strings.Join(commitSigStrings, "\n"+indent+" "),
indent, commit.hash)
}
// ToProto converts Commit to protobuf
func (commit *Commit) ToProto() *tmproto.Commit {
if commit == nil {
return nil
}
c := new(tmproto.Commit)
sigs := make([]tmproto.CommitSig, len(commit.Signatures))
for i := range commit.Signatures {
sigs[i] = *commit.Signatures[i].ToProto()
}
c.Signatures = sigs
c.Height = commit.Height
c.Round = commit.Round
c.BlockID = commit.BlockID.ToProto()
return c
}
// FromProto sets a protobuf Commit to the given pointer.
// It returns an error if the commit is invalid.
func CommitFromProto(cp *tmproto.Commit) (*Commit, error) {
if cp == nil {
return nil, errors.New("nil Commit")
}
var (
commit = new(Commit)
)
bi, err := BlockIDFromProto(&cp.BlockID)
if err != nil {
return nil, err
}
sigs := make([]CommitSig, len(cp.Signatures))
for i := range cp.Signatures {
if err := sigs[i].FromProto(cp.Signatures[i]); err != nil {
return nil, err
}
}
commit.Signatures = sigs
commit.Height = cp.Height
commit.Round = cp.Round
commit.BlockID = *bi
return commit, commit.ValidateBasic()
}
//-----------------------------------------------------------------------------
// Data contains the set of transactions included in the block
type Data struct {
// Txs that will be applied by state @ block.Height+1.
// NOTE: not all txs here are valid. We're just agreeing on the order first.
// This means that block.AppHash does not include these txs.
Txs Txs `json:"txs"`
// Volatile
hash tmbytes.HexBytes
}
// Hash returns the hash of the data
func (data *Data) Hash() tmbytes.HexBytes {
if data == nil {
return (Txs{}).Hash()
}
if data.hash == nil {
data.hash = data.Txs.Hash() // NOTE: leaves of merkle tree are TxIDs
}
return data.hash
}
// StringIndented returns an indented string representation of the transactions.
func (data *Data) StringIndented(indent string) string {
if data == nil {
return "nil-Data"
}
txStrings := make([]string, tmmath.MinInt(len(data.Txs), 21))
for i, tx := range data.Txs {
if i == 20 {
txStrings[i] = fmt.Sprintf("... (%v total)", len(data.Txs))
break
}
txStrings[i] = fmt.Sprintf("%X (%d bytes)", tx.Hash(), len(tx))
}
return fmt.Sprintf(`Data{
%s %v
%s}#%v`,
indent, strings.Join(txStrings, "\n"+indent+" "),
indent, data.hash)
}
// ToProto converts Data to protobuf
func (data *Data) ToProto() tmproto.Data {
tp := new(tmproto.Data)
if len(data.Txs) > 0 {
txBzs := make([][]byte, len(data.Txs))
for i := range data.Txs {
txBzs[i] = data.Txs[i]
}
tp.Txs = txBzs
}
return *tp
}
// DataFromProto takes a protobuf representation of Data &
// returns the native type.
func DataFromProto(dp *tmproto.Data) (Data, error) {
if dp == nil {
return Data{}, errors.New("nil data")
}
data := new(Data)
if len(dp.Txs) > 0 {
txBzs := make(Txs, len(dp.Txs))
for i := range dp.Txs {
txBzs[i] = Tx(dp.Txs[i])
}
data.Txs = txBzs
} else {
data.Txs = Txs{}
}
return *data, nil
}
//-----------------------------------------------------------------------------
// EvidenceData contains any evidence of malicious wrong-doing by validators
type EvidenceData struct {
Evidence EvidenceList `json:"evidence"`
// Volatile. Used as cache
hash tmbytes.HexBytes
byteSize int64
}
// Hash returns the hash of the data.
func (data *EvidenceData) Hash() tmbytes.HexBytes {
if data.hash == nil {
data.hash = data.Evidence.Hash()
}
return data.hash
}
// ByteSize returns the total byte size of all the evidence
func (data *EvidenceData) ByteSize() int64 {
if data.byteSize == 0 && len(data.Evidence) != 0 {
pb, err := data.ToProto()
if err != nil {
panic(err)
}
data.byteSize = int64(pb.Size())
}
return data.byteSize
}
// StringIndented returns a string representation of the evidence.
func (data *EvidenceData) StringIndented(indent string) string {
if data == nil {
return "nil-Evidence"
}
evStrings := make([]string, tmmath.MinInt(len(data.Evidence), 21))
for i, ev := range data.Evidence {
if i == 20 {
evStrings[i] = fmt.Sprintf("... (%v total)", len(data.Evidence))
break
}
evStrings[i] = fmt.Sprintf("Evidence:%v", ev)
}
return fmt.Sprintf(`EvidenceData{
%s %v
%s}#%v`,
indent, strings.Join(evStrings, "\n"+indent+" "),
indent, data.hash)
}
// ToProto converts EvidenceData to protobuf
func (data *EvidenceData) ToProto() (*tmproto.EvidenceList, error) {
if data == nil {
return nil, errors.New("nil evidence data")
}
evi := new(tmproto.EvidenceList)
eviBzs := make([]tmproto.Evidence, len(data.Evidence))
for i := range data.Evidence {
protoEvi, err := EvidenceToProto(data.Evidence[i])
if err != nil {
return nil, err
}
eviBzs[i] = *protoEvi
}
evi.Evidence = eviBzs
return evi, nil
}
// FromProto sets a protobuf EvidenceData to the given pointer.
func (data *EvidenceData) FromProto(eviData *tmproto.EvidenceList) error {
if eviData == nil {
return errors.New("nil evidenceData")
}
eviBzs := make(EvidenceList, len(eviData.Evidence))
for i := range eviData.Evidence {
evi, err := EvidenceFromProto(&eviData.Evidence[i])
if err != nil {
return err
}
eviBzs[i] = evi
}
data.Evidence = eviBzs
data.byteSize = int64(eviData.Size())
return nil
}
//--------------------------------------------------------------------------------
// BlockID
type BlockID struct {
Hash tmbytes.HexBytes `json:"hash"`
PartSetHeader PartSetHeader `json:"parts"`
}
// Equals returns true if the BlockID matches the given BlockID
func (blockID BlockID) Equals(other BlockID) bool {
return bytes.Equal(blockID.Hash, other.Hash) &&
blockID.PartSetHeader.Equals(other.PartSetHeader)
}
// Key returns a machine-readable string representation of the BlockID
func (blockID BlockID) Key() string {
pbph := blockID.PartSetHeader.ToProto()
bz, err := pbph.Marshal()
if err != nil {
panic(err)
}
return fmt.Sprint(string(blockID.Hash), string(bz))
}
// ValidateBasic performs basic validation.
func (blockID BlockID) ValidateBasic() error {
// Hash can be empty in case of POLBlockID in Proposal.
if err := ValidateHash(blockID.Hash); err != nil {
return fmt.Errorf("wrong Hash")
}
if err := blockID.PartSetHeader.ValidateBasic(); err != nil {
return fmt.Errorf("wrong PartSetHeader: %v", err)
}
return nil
}
// IsZero returns true if this is the BlockID of a nil block.
func (blockID BlockID) IsZero() bool {
return len(blockID.Hash) == 0 &&
blockID.PartSetHeader.IsZero()
}
// IsComplete returns true if this is a valid BlockID of a non-nil block.
func (blockID BlockID) IsComplete() bool {
return len(blockID.Hash) == tmhash.Size &&
blockID.PartSetHeader.Total > 0 &&
len(blockID.PartSetHeader.Hash) == tmhash.Size
}
// String returns a human readable string representation of the BlockID.
//
// 1. hash
// 2. part set header
//
// See PartSetHeader#String
func (blockID BlockID) String() string {
return fmt.Sprintf(`%v:%v`, blockID.Hash, blockID.PartSetHeader)
}
// ToProto converts BlockID to protobuf
func (blockID *BlockID) ToProto() tmproto.BlockID {
if blockID == nil {
return tmproto.BlockID{}
}
return tmproto.BlockID{
Hash: blockID.Hash,
PartSetHeader: blockID.PartSetHeader.ToProto(),
}
}
// FromProto sets a protobuf BlockID to the given pointer.
// It returns an error if the block id is invalid.
func BlockIDFromProto(bID *tmproto.BlockID) (*BlockID, error) {
if bID == nil {
return nil, errors.New("nil BlockID")
}
blockID := new(BlockID)
ph, err := PartSetHeaderFromProto(&bID.PartSetHeader)
if err != nil {
return nil, err
}
blockID.PartSetHeader = *ph
blockID.Hash = bID.Hash
return blockID, blockID.ValidateBasic()
}
