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937 lines
27 KiB
937 lines
27 KiB
package types
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import (
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"bytes"
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"fmt"
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"strings"
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"sync"
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"time"
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"github.com/pkg/errors"
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"github.com/tendermint/tendermint/crypto"
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"github.com/tendermint/tendermint/crypto/merkle"
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"github.com/tendermint/tendermint/crypto/tmhash"
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"github.com/tendermint/tendermint/libs/bits"
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tmbytes "github.com/tendermint/tendermint/libs/bytes"
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tmmath "github.com/tendermint/tendermint/libs/math"
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"github.com/tendermint/tendermint/version"
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)
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const (
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// MaxHeaderBytes is a maximum header size (including amino overhead).
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MaxHeaderBytes int64 = 632
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// MaxAminoOverheadForBlock - maximum amino overhead to encode a block (up to
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// MaxBlockSizeBytes in size) not including it's parts except Data.
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// This means it also excludes the overhead for individual transactions.
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// To compute individual transactions' overhead use types.ComputeAminoOverhead(tx types.Tx, fieldNum int).
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//
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// Uvarint length of MaxBlockSizeBytes: 4 bytes
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// 2 fields (2 embedded): 2 bytes
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// Uvarint length of Data.Txs: 4 bytes
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// Data.Txs field: 1 byte
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MaxAminoOverheadForBlock int64 = 11
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)
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// Block defines the atomic unit of a Tendermint blockchain.
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type Block struct {
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mtx sync.Mutex
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Header `json:"header"`
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Data `json:"data"`
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Evidence EvidenceData `json:"evidence"`
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LastCommit *Commit `json:"last_commit"`
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}
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// ValidateBasic performs basic validation that doesn't involve state data.
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// It checks the internal consistency of the block.
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// Further validation is done using state#ValidateBlock.
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func (b *Block) ValidateBasic() error {
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if b == nil {
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return errors.New("nil block")
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}
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b.mtx.Lock()
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defer b.mtx.Unlock()
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if len(b.ChainID) > MaxChainIDLen {
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return fmt.Errorf("chainID is too long. Max is %d, got %d", MaxChainIDLen, len(b.ChainID))
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}
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if b.Height < 0 {
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return errors.New("negative Header.Height")
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} else if b.Height == 0 {
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return errors.New("zero Header.Height")
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}
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// NOTE: Timestamp validation is subtle and handled elsewhere.
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if err := b.LastBlockID.ValidateBasic(); err != nil {
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return fmt.Errorf("wrong Header.LastBlockID: %v", err)
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}
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// Validate the last commit and its hash.
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if b.Header.Height > 1 {
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if b.LastCommit == nil {
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return errors.New("nil LastCommit")
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}
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if err := b.LastCommit.ValidateBasic(); err != nil {
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return fmt.Errorf("wrong LastCommit: %v", err)
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}
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}
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if err := ValidateHash(b.LastCommitHash); err != nil {
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return fmt.Errorf("wrong Header.LastCommitHash: %v", err)
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}
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if !bytes.Equal(b.LastCommitHash, b.LastCommit.Hash()) {
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return fmt.Errorf("wrong Header.LastCommitHash. Expected %v, got %v",
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b.LastCommit.Hash(),
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b.LastCommitHash,
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)
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}
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// Validate the hash of the transactions.
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// NOTE: b.Data.Txs may be nil, but b.Data.Hash()
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// still works fine
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if err := ValidateHash(b.DataHash); err != nil {
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return fmt.Errorf("wrong Header.DataHash: %v", err)
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}
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if !bytes.Equal(b.DataHash, b.Data.Hash()) {
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return fmt.Errorf(
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"wrong Header.DataHash. Expected %v, got %v",
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b.Data.Hash(),
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b.DataHash,
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)
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}
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// Basic validation of hashes related to application data.
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// Will validate fully against state in state#ValidateBlock.
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if err := ValidateHash(b.ValidatorsHash); err != nil {
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return fmt.Errorf("wrong Header.ValidatorsHash: %v", err)
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}
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if err := ValidateHash(b.NextValidatorsHash); err != nil {
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return fmt.Errorf("wrong Header.NextValidatorsHash: %v", err)
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}
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if err := ValidateHash(b.ConsensusHash); err != nil {
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return fmt.Errorf("wrong Header.ConsensusHash: %v", err)
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}
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// NOTE: AppHash is arbitrary length
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if err := ValidateHash(b.LastResultsHash); err != nil {
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return fmt.Errorf("wrong Header.LastResultsHash: %v", err)
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}
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// Validate evidence and its hash.
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if err := ValidateHash(b.EvidenceHash); err != nil {
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return fmt.Errorf("wrong Header.EvidenceHash: %v", err)
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}
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// NOTE: b.Evidence.Evidence may be nil, but we're just looping.
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for i, ev := range b.Evidence.Evidence {
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if err := ev.ValidateBasic(); err != nil {
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return fmt.Errorf("invalid evidence (#%d): %v", i, err)
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}
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}
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if !bytes.Equal(b.EvidenceHash, b.Evidence.Hash()) {
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return fmt.Errorf("wrong Header.EvidenceHash. Expected %v, got %v",
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b.EvidenceHash,
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b.Evidence.Hash(),
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)
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}
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if len(b.ProposerAddress) != crypto.AddressSize {
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return fmt.Errorf("expected len(Header.ProposerAddress) to be %d, got %d",
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crypto.AddressSize, len(b.ProposerAddress))
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}
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return nil
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}
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// fillHeader fills in any remaining header fields that are a function of the block data
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func (b *Block) fillHeader() {
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if b.LastCommitHash == nil {
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b.LastCommitHash = b.LastCommit.Hash()
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}
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if b.DataHash == nil {
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b.DataHash = b.Data.Hash()
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}
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if b.EvidenceHash == nil {
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b.EvidenceHash = b.Evidence.Hash()
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}
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}
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// Hash computes and returns the block hash.
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// If the block is incomplete, block hash is nil for safety.
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func (b *Block) Hash() tmbytes.HexBytes {
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if b == nil {
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return nil
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}
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b.mtx.Lock()
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defer b.mtx.Unlock()
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if b.LastCommit == nil {
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return nil
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}
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b.fillHeader()
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return b.Header.Hash()
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}
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// MakePartSet returns a PartSet containing parts of a serialized block.
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// This is the form in which the block is gossipped to peers.
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// CONTRACT: partSize is greater than zero.
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func (b *Block) MakePartSet(partSize int) *PartSet {
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if b == nil {
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return nil
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}
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b.mtx.Lock()
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defer b.mtx.Unlock()
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// We prefix the byte length, so that unmarshaling
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// can easily happen via a reader.
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bz, err := cdc.MarshalBinaryLengthPrefixed(b)
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if err != nil {
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panic(err)
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}
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return NewPartSetFromData(bz, partSize)
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}
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// HashesTo is a convenience function that checks if a block hashes to the given argument.
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// Returns false if the block is nil or the hash is empty.
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func (b *Block) HashesTo(hash []byte) bool {
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if len(hash) == 0 {
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return false
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}
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if b == nil {
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return false
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}
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return bytes.Equal(b.Hash(), hash)
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}
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// Size returns size of the block in bytes.
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func (b *Block) Size() int {
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bz, err := cdc.MarshalBinaryBare(b)
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if err != nil {
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return 0
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}
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return len(bz)
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}
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// String returns a string representation of the block
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func (b *Block) String() string {
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return b.StringIndented("")
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}
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// StringIndented returns a string representation of the block
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func (b *Block) StringIndented(indent string) string {
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if b == nil {
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return "nil-Block"
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}
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return fmt.Sprintf(`Block{
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%s %v
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%s %v
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%s %v
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%s %v
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%s}#%v`,
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indent, b.Header.StringIndented(indent+" "),
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indent, b.Data.StringIndented(indent+" "),
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indent, b.Evidence.StringIndented(indent+" "),
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indent, b.LastCommit.StringIndented(indent+" "),
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indent, b.Hash())
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}
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// StringShort returns a shortened string representation of the block
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func (b *Block) StringShort() string {
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if b == nil {
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return "nil-Block"
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}
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return fmt.Sprintf("Block#%v", b.Hash())
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}
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//-----------------------------------------------------------
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// These methods are for Protobuf Compatibility
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// Marshal returns the amino encoding.
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func (b *Block) Marshal() ([]byte, error) {
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return cdc.MarshalBinaryBare(b)
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}
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// MarshalTo calls Marshal and copies to the given buffer.
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func (b *Block) MarshalTo(data []byte) (int, error) {
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bs, err := b.Marshal()
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if err != nil {
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return -1, err
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}
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return copy(data, bs), nil
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}
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// Unmarshal deserializes from amino encoded form.
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func (b *Block) Unmarshal(bs []byte) error {
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return cdc.UnmarshalBinaryBare(bs, b)
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}
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//-----------------------------------------------------------------------------
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// MaxDataBytes returns the maximum size of block's data.
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//
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// XXX: Panics on negative result.
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func MaxDataBytes(maxBytes int64, valsCount, evidenceCount int) int64 {
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maxDataBytes := maxBytes -
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MaxAminoOverheadForBlock -
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MaxHeaderBytes -
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int64(valsCount)*MaxVoteBytes -
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int64(evidenceCount)*MaxEvidenceBytes
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if maxDataBytes < 0 {
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panic(fmt.Sprintf(
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"Negative MaxDataBytes. Block.MaxBytes=%d is too small to accommodate header&lastCommit&evidence=%d",
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maxBytes,
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-(maxDataBytes - maxBytes),
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))
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}
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return maxDataBytes
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}
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// MaxDataBytesUnknownEvidence returns the maximum size of block's data when
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// evidence count is unknown. MaxEvidencePerBlock will be used for the size
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// of evidence.
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//
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// XXX: Panics on negative result.
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func MaxDataBytesUnknownEvidence(maxBytes int64, valsCount int) int64 {
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_, maxEvidenceBytes := MaxEvidencePerBlock(maxBytes)
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maxDataBytes := maxBytes -
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MaxAminoOverheadForBlock -
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MaxHeaderBytes -
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int64(valsCount)*MaxVoteBytes -
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maxEvidenceBytes
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if maxDataBytes < 0 {
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panic(fmt.Sprintf(
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"Negative MaxDataBytesUnknownEvidence. Block.MaxBytes=%d is too small to accommodate header&lastCommit&evidence=%d",
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maxBytes,
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-(maxDataBytes - maxBytes),
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))
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}
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return maxDataBytes
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}
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//-----------------------------------------------------------------------------
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// Header defines the structure of a Tendermint block header.
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// NOTE: changes to the Header should be duplicated in:
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// - header.Hash()
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// - abci.Header
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// - /docs/spec/blockchain/blockchain.md
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type Header struct {
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// basic block info
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Version version.Consensus `json:"version"`
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ChainID string `json:"chain_id"`
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Height int64 `json:"height"`
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Time time.Time `json:"time"`
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// prev block info
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LastBlockID BlockID `json:"last_block_id"`
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// hashes of block data
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LastCommitHash tmbytes.HexBytes `json:"last_commit_hash"` // commit from validators from the last block
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DataHash tmbytes.HexBytes `json:"data_hash"` // transactions
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// hashes from the app output from the prev block
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ValidatorsHash tmbytes.HexBytes `json:"validators_hash"` // validators for the current block
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NextValidatorsHash tmbytes.HexBytes `json:"next_validators_hash"` // validators for the next block
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ConsensusHash tmbytes.HexBytes `json:"consensus_hash"` // consensus params for current block
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AppHash tmbytes.HexBytes `json:"app_hash"` // state after txs from the previous block
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// root hash of all results from the txs from the previous block
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LastResultsHash tmbytes.HexBytes `json:"last_results_hash"`
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// consensus info
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EvidenceHash tmbytes.HexBytes `json:"evidence_hash"` // evidence included in the block
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ProposerAddress Address `json:"proposer_address"` // original proposer of the block
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}
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// Populate the Header with state-derived data.
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// Call this after MakeBlock to complete the Header.
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func (h *Header) Populate(
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version version.Consensus, chainID string,
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timestamp time.Time, lastBlockID BlockID,
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valHash, nextValHash []byte,
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consensusHash, appHash, lastResultsHash []byte,
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proposerAddress Address,
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) {
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h.Version = version
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h.ChainID = chainID
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h.Time = timestamp
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h.LastBlockID = lastBlockID
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h.ValidatorsHash = valHash
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h.NextValidatorsHash = nextValHash
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h.ConsensusHash = consensusHash
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h.AppHash = appHash
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h.LastResultsHash = lastResultsHash
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h.ProposerAddress = proposerAddress
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}
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// Hash returns the hash of the header.
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// It computes a Merkle tree from the header fields
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// ordered as they appear in the Header.
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// Returns nil if ValidatorHash is missing,
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// since a Header is not valid unless there is
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// a ValidatorsHash (corresponding to the validator set).
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func (h *Header) Hash() tmbytes.HexBytes {
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if h == nil || len(h.ValidatorsHash) == 0 {
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return nil
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}
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return merkle.SimpleHashFromByteSlices([][]byte{
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cdcEncode(h.Version),
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cdcEncode(h.ChainID),
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cdcEncode(h.Height),
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cdcEncode(h.Time),
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cdcEncode(h.LastBlockID),
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cdcEncode(h.LastCommitHash),
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cdcEncode(h.DataHash),
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cdcEncode(h.ValidatorsHash),
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cdcEncode(h.NextValidatorsHash),
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cdcEncode(h.ConsensusHash),
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cdcEncode(h.AppHash),
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cdcEncode(h.LastResultsHash),
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cdcEncode(h.EvidenceHash),
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cdcEncode(h.ProposerAddress),
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})
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}
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// StringIndented returns a string representation of the header
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func (h *Header) StringIndented(indent string) string {
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if h == nil {
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return "nil-Header"
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}
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return fmt.Sprintf(`Header{
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%s Version: %v
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%s ChainID: %v
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%s Height: %v
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%s Time: %v
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%s LastBlockID: %v
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%s LastCommit: %v
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%s Data: %v
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%s Validators: %v
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%s NextValidators: %v
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%s App: %v
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%s Consensus: %v
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%s Results: %v
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%s Evidence: %v
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%s Proposer: %v
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%s}#%v`,
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indent, h.Version,
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indent, h.ChainID,
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indent, h.Height,
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indent, h.Time,
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indent, h.LastBlockID,
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indent, h.LastCommitHash,
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indent, h.DataHash,
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indent, h.ValidatorsHash,
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indent, h.NextValidatorsHash,
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indent, h.AppHash,
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indent, h.ConsensusHash,
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indent, h.LastResultsHash,
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indent, h.EvidenceHash,
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indent, h.ProposerAddress,
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indent, h.Hash())
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}
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//-------------------------------------
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// BlockIDFlag indicates which BlockID the signature is for.
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type BlockIDFlag byte
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const (
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// BlockIDFlagAbsent - no vote was received from a validator.
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BlockIDFlagAbsent BlockIDFlag = iota + 1
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// BlockIDFlagCommit - voted for the Commit.BlockID.
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BlockIDFlagCommit
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// BlockIDFlagNil - voted for nil.
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BlockIDFlagNil
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)
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// CommitSig is a part of the Vote included in a Commit.
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type CommitSig struct {
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BlockIDFlag BlockIDFlag `json:"block_id_flag"`
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ValidatorAddress Address `json:"validator_address"`
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Timestamp time.Time `json:"timestamp"`
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Signature []byte `json:"signature"`
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}
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// NewCommitSigForBlock returns new CommitSig with BlockIDFlagCommit.
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func NewCommitSigForBlock(signature []byte, valAddr Address, ts time.Time) CommitSig {
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return CommitSig{
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BlockIDFlag: BlockIDFlagCommit,
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ValidatorAddress: valAddr,
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Timestamp: ts,
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Signature: signature,
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}
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}
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// NewCommitSigAbsent returns new CommitSig with BlockIDFlagAbsent. Other
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// fields are all empty.
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func NewCommitSigAbsent() CommitSig {
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return CommitSig{
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BlockIDFlag: BlockIDFlagAbsent,
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}
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}
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// Absent returns true if CommitSig is absent.
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func (cs CommitSig) Absent() bool {
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return cs.BlockIDFlag == BlockIDFlagAbsent
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}
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func (cs CommitSig) String() string {
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return fmt.Sprintf("CommitSig{%X by %X on %v @ %s}",
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tmbytes.Fingerprint(cs.Signature),
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tmbytes.Fingerprint(cs.ValidatorAddress),
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cs.BlockIDFlag,
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CanonicalTime(cs.Timestamp))
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}
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// BlockID returns the Commit's BlockID if CommitSig indicates signing,
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// otherwise - empty BlockID.
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func (cs CommitSig) BlockID(commitBlockID BlockID) BlockID {
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var blockID BlockID
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switch cs.BlockIDFlag {
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case BlockIDFlagAbsent:
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blockID = BlockID{}
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case BlockIDFlagCommit:
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blockID = commitBlockID
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case BlockIDFlagNil:
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blockID = BlockID{}
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default:
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panic(fmt.Sprintf("Unknown BlockIDFlag: %v", cs.BlockIDFlag))
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}
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return blockID
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}
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|
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// ValidateBasic performs basic validation.
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func (cs CommitSig) ValidateBasic() error {
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switch cs.BlockIDFlag {
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case BlockIDFlagAbsent:
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case BlockIDFlagCommit:
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case BlockIDFlagNil:
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default:
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return fmt.Errorf("unknown BlockIDFlag: %v", cs.BlockIDFlag)
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}
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switch cs.BlockIDFlag {
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case BlockIDFlagAbsent:
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if len(cs.ValidatorAddress) != 0 {
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return errors.New("validator address is present")
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}
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if !cs.Timestamp.IsZero() {
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return errors.New("time is present")
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}
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if len(cs.Signature) != 0 {
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return errors.New("signature is present")
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}
|
|
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
|
|
}
|
|
|
|
//-------------------------------------
|
|
|
|
// 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 int `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 int, 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, PrecommitType, vals)
|
|
for idx, commitSig := range commit.Signatures {
|
|
if commitSig.Absent() {
|
|
continue // OK, some precommits can be missing.
|
|
}
|
|
added, err := voteSet.AddVote(commit.GetVote(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 int) *Vote {
|
|
commitSig := commit.Signatures[valIdx]
|
|
return &Vote{
|
|
Type: PrecommitType,
|
|
Height: commit.Height,
|
|
Round: commit.Round,
|
|
BlockID: commitSig.BlockID(commit.BlockID),
|
|
Timestamp: commitSig.Timestamp,
|
|
ValidatorAddress: commitSig.ValidatorAddress,
|
|
ValidatorIndex: valIdx,
|
|
Signature: commitSig.Signature,
|
|
}
|
|
}
|
|
|
|
// VoteSignBytes constructs the SignBytes for the given CommitSig.
|
|
// The only unique part of the SignBytes is the Timestamp - all other fields
|
|
// signed over are otherwise the same for all validators.
|
|
// Panics if valIdx >= commit.Size().
|
|
func (commit *Commit) VoteSignBytes(chainID string, valIdx int) []byte {
|
|
return commit.GetVote(valIdx).SignBytes(chainID)
|
|
}
|
|
|
|
// Type returns the vote type of the commit, which is always VoteTypePrecommit
|
|
// Implements VoteSetReader.
|
|
func (commit *Commit) Type() byte {
|
|
return byte(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() int {
|
|
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 int) *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.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 {
|
|
bs[i] = cdcEncode(commitSig)
|
|
}
|
|
commit.hash = merkle.SimpleHashFromByteSlices(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)
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
// SignedHeader is a header along with the commits that prove it.
|
|
// It is the basis of the lite client.
|
|
type SignedHeader struct {
|
|
*Header `json:"header"`
|
|
Commit *Commit `json:"commit"`
|
|
}
|
|
|
|
// ValidateBasic does basic consistency checks and makes sure the header
|
|
// and commit are consistent.
|
|
//
|
|
// NOTE: This does not actually check the cryptographic signatures. Make
|
|
// sure to use a Verifier to validate the signatures actually provide a
|
|
// significantly strong proof for this header's validity.
|
|
func (sh SignedHeader) ValidateBasic(chainID string) error {
|
|
// Make sure the header is consistent with the commit.
|
|
if sh.Header == nil {
|
|
return errors.New("signedHeader missing header")
|
|
}
|
|
if sh.Commit == nil {
|
|
return errors.New("signedHeader missing commit (precommit votes)")
|
|
}
|
|
|
|
// Check ChainID.
|
|
if sh.ChainID != chainID {
|
|
return fmt.Errorf("signedHeader belongs to another chain '%s' not '%s'",
|
|
sh.ChainID, chainID)
|
|
}
|
|
// Check Height.
|
|
if sh.Commit.Height != sh.Height {
|
|
return fmt.Errorf("signedHeader header and commit height mismatch: %v vs %v",
|
|
sh.Height, sh.Commit.Height)
|
|
}
|
|
// Check Hash.
|
|
hhash := sh.Hash()
|
|
chash := sh.Commit.BlockID.Hash
|
|
if !bytes.Equal(hhash, chash) {
|
|
return fmt.Errorf("signedHeader commit signs block %X, header is block %X",
|
|
chash, hhash)
|
|
}
|
|
// ValidateBasic on the Commit.
|
|
err := sh.Commit.ValidateBasic()
|
|
if err != nil {
|
|
return errors.Wrap(err, "commit.ValidateBasic failed during SignedHeader.ValidateBasic")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (sh SignedHeader) String() string {
|
|
return sh.StringIndented("")
|
|
}
|
|
|
|
// StringIndented returns a string representation of the SignedHeader.
|
|
func (sh SignedHeader) StringIndented(indent string) string {
|
|
return fmt.Sprintf(`SignedHeader{
|
|
%s %v
|
|
%s %v
|
|
%s}`,
|
|
indent, sh.Header.StringIndented(indent+" "),
|
|
indent, sh.Commit.StringIndented(indent+" "),
|
|
indent)
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
// 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 a 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)
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
// EvidenceData contains any evidence of malicious wrong-doing by validators
|
|
type EvidenceData struct {
|
|
Evidence EvidenceList `json:"evidence"`
|
|
|
|
// Volatile
|
|
hash tmbytes.HexBytes
|
|
}
|
|
|
|
// 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
|
|
}
|
|
|
|
// 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)
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------
|
|
|
|
// BlockID defines the unique ID of a block as its Hash and its PartSetHeader
|
|
type BlockID struct {
|
|
Hash tmbytes.HexBytes `json:"hash"`
|
|
PartsHeader 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.PartsHeader.Equals(other.PartsHeader)
|
|
}
|
|
|
|
// Key returns a machine-readable string representation of the BlockID
|
|
func (blockID BlockID) Key() string {
|
|
bz, err := cdc.MarshalBinaryBare(blockID.PartsHeader)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return 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.PartsHeader.ValidateBasic(); err != nil {
|
|
return fmt.Errorf("wrong PartsHeader: %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.PartsHeader.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.PartsHeader.Total > 0 &&
|
|
len(blockID.PartsHeader.Hash) == tmhash.Size
|
|
}
|
|
|
|
// String returns a human readable string representation of the BlockID
|
|
func (blockID BlockID) String() string {
|
|
return fmt.Sprintf(`%v:%v`, blockID.Hash, blockID.PartsHeader)
|
|
}
|