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.
456 lines
13 KiB
456 lines
13 KiB
package types
|
|
|
|
import (
|
|
"bytes"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"strings"
|
|
"time"
|
|
|
|
wire "github.com/tendermint/go-wire"
|
|
"github.com/tendermint/go-wire/data"
|
|
cmn "github.com/tendermint/tmlibs/common"
|
|
"github.com/tendermint/tmlibs/merkle"
|
|
)
|
|
|
|
// Block defines the atomic unit of a Tendermint blockchain.
|
|
type Block struct {
|
|
*Header `json:"header"`
|
|
*Data `json:"data"`
|
|
LastCommit *Commit `json:"last_commit"`
|
|
}
|
|
|
|
// MakeBlock returns a new block and corresponding partset from the given information.
|
|
// TODO: Add version information to the Block struct.
|
|
func MakeBlock(height int, chainID string, txs []Tx, commit *Commit,
|
|
prevBlockID BlockID, valHash, appHash []byte, partSize int) (*Block, *PartSet) {
|
|
block := &Block{
|
|
Header: &Header{
|
|
ChainID: chainID,
|
|
Height: height,
|
|
Time: time.Now(),
|
|
NumTxs: len(txs),
|
|
LastBlockID: prevBlockID,
|
|
ValidatorsHash: valHash,
|
|
AppHash: appHash, // state merkle root of txs from the previous block.
|
|
},
|
|
LastCommit: commit,
|
|
Data: &Data{
|
|
Txs: txs,
|
|
},
|
|
}
|
|
block.FillHeader()
|
|
return block, block.MakePartSet(partSize)
|
|
}
|
|
|
|
// ValidateBasic performs basic validation that doesn't involve state data.
|
|
func (b *Block) ValidateBasic(chainID string, lastBlockHeight int, lastBlockID BlockID,
|
|
lastBlockTime time.Time, appHash []byte) error {
|
|
if b.ChainID != chainID {
|
|
return errors.New(cmn.Fmt("Wrong Block.Header.ChainID. Expected %v, got %v", chainID, b.ChainID))
|
|
}
|
|
if b.Height != lastBlockHeight+1 {
|
|
return errors.New(cmn.Fmt("Wrong Block.Header.Height. Expected %v, got %v", lastBlockHeight+1, b.Height))
|
|
}
|
|
/* TODO: Determine bounds for Time
|
|
See blockchain/reactor "stopSyncingDurationMinutes"
|
|
|
|
if !b.Time.After(lastBlockTime) {
|
|
return errors.New("Invalid Block.Header.Time")
|
|
}
|
|
*/
|
|
if b.NumTxs != len(b.Data.Txs) {
|
|
return errors.New(cmn.Fmt("Wrong Block.Header.NumTxs. Expected %v, got %v", len(b.Data.Txs), b.NumTxs))
|
|
}
|
|
if !b.LastBlockID.Equals(lastBlockID) {
|
|
return errors.New(cmn.Fmt("Wrong Block.Header.LastBlockID. Expected %v, got %v", lastBlockID, b.LastBlockID))
|
|
}
|
|
if !bytes.Equal(b.LastCommitHash, b.LastCommit.Hash()) {
|
|
return errors.New(cmn.Fmt("Wrong Block.Header.LastCommitHash. Expected %v, got %v", b.LastCommitHash, b.LastCommit.Hash()))
|
|
}
|
|
if b.Header.Height != 1 {
|
|
if err := b.LastCommit.ValidateBasic(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if !bytes.Equal(b.DataHash, b.Data.Hash()) {
|
|
return errors.New(cmn.Fmt("Wrong Block.Header.DataHash. Expected %v, got %v", b.DataHash, b.Data.Hash()))
|
|
}
|
|
if !bytes.Equal(b.AppHash, appHash) {
|
|
return errors.New(cmn.Fmt("Wrong Block.Header.AppHash. Expected %X, got %v", appHash, b.AppHash))
|
|
}
|
|
// NOTE: the AppHash and ValidatorsHash are validated later.
|
|
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()
|
|
}
|
|
}
|
|
|
|
// Hash computes and returns the block hash.
|
|
// If the block is incomplete, block hash is nil for safety.
|
|
func (b *Block) Hash() data.Bytes {
|
|
// fmt.Println(">>", b.Data)
|
|
if b == nil || b.Header == nil || b.Data == nil || 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.
|
|
func (b *Block) MakePartSet(partSize int) *PartSet {
|
|
return NewPartSetFromData(wire.BinaryBytes(b), partSize)
|
|
}
|
|
|
|
// HashesTo is a convenience function that checks if a block hashes to the given argument.
|
|
// A nil block never hashes to anything, and nothing hashes to a nil hash.
|
|
func (b *Block) HashesTo(hash []byte) bool {
|
|
if len(hash) == 0 {
|
|
return false
|
|
}
|
|
if b == nil {
|
|
return false
|
|
}
|
|
return bytes.Equal(b.Hash(), hash)
|
|
}
|
|
|
|
// String returns a string representation of the block
|
|
func (b *Block) String() string {
|
|
return b.StringIndented("")
|
|
}
|
|
|
|
// StringIndented returns a string representation of the block
|
|
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`,
|
|
indent, b.Header.StringIndented(indent+" "),
|
|
indent, b.Data.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"
|
|
} else {
|
|
return fmt.Sprintf("Block#%v", b.Hash())
|
|
}
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
// Header defines the structure of a Tendermint block header
|
|
type Header struct {
|
|
ChainID string `json:"chain_id"`
|
|
Height int `json:"height"`
|
|
Time time.Time `json:"time"`
|
|
NumTxs int `json:"num_txs"` // XXX: Can we get rid of this?
|
|
LastBlockID BlockID `json:"last_block_id"`
|
|
LastCommitHash data.Bytes `json:"last_commit_hash"` // commit from validators from the last block
|
|
DataHash data.Bytes `json:"data_hash"` // transactions
|
|
ValidatorsHash data.Bytes `json:"validators_hash"` // validators for the current block
|
|
AppHash data.Bytes `json:"app_hash"` // state after txs from the previous block
|
|
}
|
|
|
|
// Hash returns the hash of the header.
|
|
// Returns nil if ValidatorHash is missing.
|
|
func (h *Header) Hash() data.Bytes {
|
|
if len(h.ValidatorsHash) == 0 {
|
|
return nil
|
|
}
|
|
return merkle.SimpleHashFromMap(map[string]interface{}{
|
|
"ChainID": h.ChainID,
|
|
"Height": h.Height,
|
|
"Time": h.Time,
|
|
"NumTxs": h.NumTxs,
|
|
"LastBlockID": h.LastBlockID,
|
|
"LastCommit": h.LastCommitHash,
|
|
"Data": h.DataHash,
|
|
"Validators": h.ValidatorsHash,
|
|
"App": h.AppHash,
|
|
})
|
|
}
|
|
|
|
// StringIndented returns a string representation of the header
|
|
func (h *Header) StringIndented(indent string) string {
|
|
if h == nil {
|
|
return "nil-Header"
|
|
}
|
|
return fmt.Sprintf(`Header{
|
|
%s ChainID: %v
|
|
%s Height: %v
|
|
%s Time: %v
|
|
%s NumTxs: %v
|
|
%s LastBlockID: %v
|
|
%s LastCommit: %v
|
|
%s Data: %v
|
|
%s Validators: %v
|
|
%s App: %v
|
|
%s}#%v`,
|
|
indent, h.ChainID,
|
|
indent, h.Height,
|
|
indent, h.Time,
|
|
indent, h.NumTxs,
|
|
indent, h.LastBlockID,
|
|
indent, h.LastCommitHash,
|
|
indent, h.DataHash,
|
|
indent, h.ValidatorsHash,
|
|
indent, h.AppHash,
|
|
indent, h.Hash())
|
|
}
|
|
|
|
//-------------------------------------
|
|
|
|
// 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 Precommits are in order of address to preserve the bonded ValidatorSet order.
|
|
// Any peer with a block can gossip precommits by index with a peer without recalculating the
|
|
// active ValidatorSet.
|
|
BlockID BlockID `json:"blockID"`
|
|
Precommits []*Vote `json:"precommits"`
|
|
|
|
// Volatile
|
|
firstPrecommit *Vote
|
|
hash data.Bytes
|
|
bitArray *cmn.BitArray
|
|
}
|
|
|
|
// FirstPrecommit returns the first non-nil precommit in the commit
|
|
func (commit *Commit) FirstPrecommit() *Vote {
|
|
if len(commit.Precommits) == 0 {
|
|
return nil
|
|
}
|
|
if commit.firstPrecommit != nil {
|
|
return commit.firstPrecommit
|
|
}
|
|
for _, precommit := range commit.Precommits {
|
|
if precommit != nil {
|
|
commit.firstPrecommit = precommit
|
|
return precommit
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Height returns the height of the commit
|
|
func (commit *Commit) Height() int {
|
|
if len(commit.Precommits) == 0 {
|
|
return 0
|
|
}
|
|
return commit.FirstPrecommit().Height
|
|
}
|
|
|
|
// Round returns the round of the commit
|
|
func (commit *Commit) Round() int {
|
|
if len(commit.Precommits) == 0 {
|
|
return 0
|
|
}
|
|
return commit.FirstPrecommit().Round
|
|
}
|
|
|
|
// Type returns the vote type of the commit, which is always VoteTypePrecommit
|
|
func (commit *Commit) Type() byte {
|
|
return VoteTypePrecommit
|
|
}
|
|
|
|
// Size returns the number of votes in the commit
|
|
func (commit *Commit) Size() int {
|
|
if commit == nil {
|
|
return 0
|
|
}
|
|
return len(commit.Precommits)
|
|
}
|
|
|
|
// BitArray returns a BitArray of which validators voted in this commit
|
|
func (commit *Commit) BitArray() *cmn.BitArray {
|
|
if commit.bitArray == nil {
|
|
commit.bitArray = cmn.NewBitArray(len(commit.Precommits))
|
|
for i, precommit := range commit.Precommits {
|
|
// TODO: need to check the BlockID otherwise we could be counting conflicts,
|
|
// not just the one with +2/3 !
|
|
commit.bitArray.SetIndex(i, precommit != nil)
|
|
}
|
|
}
|
|
return commit.bitArray
|
|
}
|
|
|
|
// GetByIndex returns the vote corresponding to a given validator index
|
|
func (commit *Commit) GetByIndex(index int) *Vote {
|
|
return commit.Precommits[index]
|
|
}
|
|
|
|
// IsCommit returns true if there is at least one vote
|
|
func (commit *Commit) IsCommit() bool {
|
|
return len(commit.Precommits) != 0
|
|
}
|
|
|
|
// ValidateBasic performs basic validation that doesn't involve state data.
|
|
func (commit *Commit) ValidateBasic() error {
|
|
if commit.BlockID.IsZero() {
|
|
return errors.New("Commit cannot be for nil block")
|
|
}
|
|
if len(commit.Precommits) == 0 {
|
|
return errors.New("No precommits in commit")
|
|
}
|
|
height, round := commit.Height(), commit.Round()
|
|
|
|
// validate the precommits
|
|
for _, precommit := range commit.Precommits {
|
|
// It's OK for precommits to be missing.
|
|
if precommit == nil {
|
|
continue
|
|
}
|
|
// Ensure that all votes are precommits
|
|
if precommit.Type != VoteTypePrecommit {
|
|
return fmt.Errorf("Invalid commit vote. Expected precommit, got %v",
|
|
precommit.Type)
|
|
}
|
|
// Ensure that all heights are the same
|
|
if precommit.Height != height {
|
|
return fmt.Errorf("Invalid commit precommit height. Expected %v, got %v",
|
|
height, precommit.Height)
|
|
}
|
|
// Ensure that all rounds are the same
|
|
if precommit.Round != round {
|
|
return fmt.Errorf("Invalid commit precommit round. Expected %v, got %v",
|
|
round, precommit.Round)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Hash returns the hash of the commit
|
|
func (commit *Commit) Hash() data.Bytes {
|
|
if commit.hash == nil {
|
|
bs := make([]interface{}, len(commit.Precommits))
|
|
for i, precommit := range commit.Precommits {
|
|
bs[i] = precommit
|
|
}
|
|
commit.hash = merkle.SimpleHashFromBinaries(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"
|
|
}
|
|
precommitStrings := make([]string, len(commit.Precommits))
|
|
for i, precommit := range commit.Precommits {
|
|
precommitStrings[i] = precommit.String()
|
|
}
|
|
return fmt.Sprintf(`Commit{
|
|
%s BlockID: %v
|
|
%s Precommits: %v
|
|
%s}#%v`,
|
|
indent, commit.BlockID,
|
|
indent, strings.Join(precommitStrings, "\n"+indent+" "),
|
|
indent, commit.hash)
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
// SignedHeader is a header along with the commits that prove it
|
|
type SignedHeader struct {
|
|
Header *Header `json:"header"`
|
|
Commit *Commit `json:"commit"`
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
// 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 data.Bytes
|
|
}
|
|
|
|
// Hash returns the hash of the data
|
|
func (data *Data) Hash() data.Bytes {
|
|
if data.hash == nil {
|
|
data.hash = data.Txs.Hash() // NOTE: leaves of merkle tree are TxIDs
|
|
}
|
|
return data.hash
|
|
}
|
|
|
|
// StringIndented returns a string representation of the transactions
|
|
func (data *Data) StringIndented(indent string) string {
|
|
if data == nil {
|
|
return "nil-Data"
|
|
}
|
|
txStrings := make([]string, cmn.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("Tx:%v", tx)
|
|
}
|
|
return fmt.Sprintf(`Data{
|
|
%s %v
|
|
%s}#%v`,
|
|
indent, strings.Join(txStrings, "\n"+indent+" "),
|
|
indent, data.hash)
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------
|
|
|
|
// BlockID defines the unique ID of a block as its Hash and its PartSetHeader
|
|
type BlockID struct {
|
|
Hash data.Bytes `json:"hash"`
|
|
PartsHeader PartSetHeader `json:"parts"`
|
|
}
|
|
|
|
// IsZero returns true if this is the BlockID for a nil-block
|
|
func (blockID BlockID) IsZero() bool {
|
|
return len(blockID.Hash) == 0 && blockID.PartsHeader.IsZero()
|
|
}
|
|
|
|
// 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.PartsHeader.Equals(other.PartsHeader)
|
|
}
|
|
|
|
// Key returns a machine-readable string representation of the BlockID
|
|
func (blockID BlockID) Key() string {
|
|
return string(blockID.Hash) + string(wire.BinaryBytes(blockID.PartsHeader))
|
|
}
|
|
|
|
// WriteSignBytes writes the canonical bytes of the BlockID to the given writer for digital signing
|
|
func (blockID BlockID) WriteSignBytes(w io.Writer, n *int, err *error) {
|
|
if blockID.IsZero() {
|
|
wire.WriteTo([]byte("null"), w, n, err)
|
|
} else {
|
|
wire.WriteJSON(CanonicalBlockID(blockID), w, n, err)
|
|
}
|
|
|
|
}
|
|
|
|
// String returns a human readable string representation of the BlockID
|
|
func (blockID BlockID) String() string {
|
|
return fmt.Sprintf(`%v:%v`, blockID.Hash, blockID.PartsHeader)
|
|
}
|