/
block_retrieve.go
307 lines (266 loc) · 8.61 KB
/
block_retrieve.go
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package api
import (
"math/big"
"gopkg.in/fatih/set.v0"
"github.com/bytom-gm/blockchain/query"
"github.com/bytom-gm/consensus/difficulty"
chainjson "github.com/bytom-gm/encoding/json"
"github.com/bytom-gm/errors"
"github.com/bytom-gm/protocol/bc"
"github.com/bytom-gm/protocol/bc/types"
)
// return best block hash
func (a *API) getBestBlockHash() Response {
blockHash := map[string]string{"block_hash": a.chain.BestBlockHash().String()}
return NewSuccessResponse(blockHash)
}
// return current block count
func (a *API) getBlockCount() Response {
blockHeight := map[string]uint64{"block_count": a.chain.BestBlockHeight()}
return NewSuccessResponse(blockHeight)
}
// BlockTx is the tx struct for getBlock func
type BlockTx struct {
ID bc.Hash `json:"id"`
Version uint64 `json:"version"`
Size uint64 `json:"size"`
TimeRange uint64 `json:"time_range"`
Inputs []*query.AnnotatedInput `json:"inputs"`
Outputs []*query.AnnotatedOutput `json:"outputs"`
StatusFail bool `json:"status_fail"`
MuxID bc.Hash `json:"mux_id"`
}
// BlockReq is used to handle getBlock req
type BlockReq struct {
BlockHeight uint64 `json:"block_height"`
BlockHash chainjson.HexBytes `json:"block_hash"`
}
// GetBlockResp is the resp for getBlock api
type GetBlockResp struct {
Hash *bc.Hash `json:"hash"`
Size uint64 `json:"size"`
Version uint64 `json:"version"`
Height uint64 `json:"height"`
PreviousBlockHash *bc.Hash `json:"previous_block_hash"`
Timestamp uint64 `json:"timestamp"`
Nonce uint64 `json:"nonce"`
Bits uint64 `json:"bits"`
Difficulty string `json:"difficulty"`
TransactionsMerkleRoot *bc.Hash `json:"transaction_merkle_root"`
TransactionStatusHash *bc.Hash `json:"transaction_status_hash"`
Transactions []*BlockTx `json:"transactions"`
}
// return block by hash/height
func (a *API) getBlock(ins BlockReq) Response {
block, err := a.getBlockHelper(ins)
if err != nil {
return NewErrorResponse(err)
}
blockHash := block.Hash()
txStatus, err := a.chain.GetTransactionStatus(&blockHash)
rawBlock, err := block.MarshalText()
if err != nil {
return NewErrorResponse(err)
}
resp := &GetBlockResp{
Hash: &blockHash,
Size: uint64(len(rawBlock)),
Version: block.Version,
Height: block.Height,
PreviousBlockHash: &block.PreviousBlockHash,
Timestamp: block.Timestamp,
Nonce: block.Nonce,
Bits: block.Bits,
Difficulty: difficulty.CalcWork(block.Bits).String(),
TransactionsMerkleRoot: &block.TransactionsMerkleRoot,
TransactionStatusHash: &block.TransactionStatusHash,
Transactions: []*BlockTx{},
}
for i, orig := range block.Transactions {
tx := &BlockTx{
ID: orig.ID,
Version: orig.Version,
Size: orig.SerializedSize,
TimeRange: orig.TimeRange,
Inputs: []*query.AnnotatedInput{},
Outputs: []*query.AnnotatedOutput{},
}
tx.StatusFail, err = txStatus.GetStatus(i)
if err != nil {
return NewSuccessResponse(resp)
}
resOutID := orig.ResultIds[0]
resOut, ok := orig.Entries[*resOutID].(*bc.Output)
if ok {
tx.MuxID = *resOut.Source.Ref
} else {
resRetire, _ := orig.Entries[*resOutID].(*bc.Retirement)
tx.MuxID = *resRetire.Source.Ref
}
for i := range orig.Inputs {
tx.Inputs = append(tx.Inputs, a.wallet.BuildAnnotatedInput(orig, uint32(i)))
}
for i := range orig.Outputs {
tx.Outputs = append(tx.Outputs, a.wallet.BuildAnnotatedOutput(orig, i))
}
resp.Transactions = append(resp.Transactions, tx)
}
return NewSuccessResponse(resp)
}
// GetRawBlockResp is resp struct for getRawBlock API
type GetRawBlockResp struct {
RawBlock *types.Block `json:"raw_block"`
}
func (a *API) getRawBlock(ins BlockReq) Response {
block, err := a.getBlockHelper(ins)
if err != nil {
return NewErrorResponse(err)
}
resp := GetRawBlockResp{RawBlock: block}
return NewSuccessResponse(resp)
}
// GetBlockHeaderResp is resp struct for getBlockHeader API
type GetBlockHeaderResp struct {
BlockHeader *types.BlockHeader `json:"block_header"`
Reward uint64 `json:"reward"`
}
func (a *API) getBlockHeader(ins BlockReq) Response {
block, err := a.getBlockHelper(ins)
if err != nil {
return NewErrorResponse(err)
}
resp := &GetBlockHeaderResp{
BlockHeader: &block.BlockHeader,
Reward: block.Transactions[0].Outputs[0].Amount,
}
return NewSuccessResponse(resp)
}
func (a *API) getBlockHelper(ins BlockReq) (*types.Block, error) {
if len(ins.BlockHash) == 32 {
hash := hexBytesToHash(ins.BlockHash)
return a.chain.GetBlockByHash(&hash)
} else {
return a.chain.GetBlockByHeight(ins.BlockHeight)
}
}
func hexBytesToHash(hexBytes chainjson.HexBytes) bc.Hash {
b32 := [32]byte{}
copy(b32[:], hexBytes)
return bc.NewHash(b32)
}
// GetDifficultyResp is resp struct for getDifficulty API
type GetDifficultyResp struct {
BlockHash *bc.Hash `json:"hash"`
BlockHeight uint64 `json:"height"`
Bits uint64 `json:"bits"`
Difficulty string `json:"difficulty"`
}
func (a *API) getDifficulty(ins BlockReq) Response {
block, err := a.getBlockHelper(ins)
if err != nil {
return NewErrorResponse(err)
}
blockHash := block.Hash()
resp := &GetDifficultyResp{
BlockHash: &blockHash,
BlockHeight: block.Height,
Bits: block.Bits,
Difficulty: difficulty.CalcWork(block.Bits).String(),
}
return NewSuccessResponse(resp)
}
// getHashRateResp is resp struct for getHashRate API
type getHashRateResp struct {
BlockHash *bc.Hash `json:"hash"`
BlockHeight uint64 `json:"height"`
HashRate uint64 `json:"hash_rate"`
}
func (a *API) getHashRate(ins BlockReq) Response {
if len(ins.BlockHash) != 32 && len(ins.BlockHash) != 0 {
err := errors.New("Block hash format error.")
return NewErrorResponse(err)
}
if ins.BlockHeight == 0 {
ins.BlockHeight = a.chain.BestBlockHeight()
}
block, err := a.getBlockHelper(ins)
if err != nil {
return NewErrorResponse(err)
}
preBlock, err := a.chain.GetBlockByHash(&block.PreviousBlockHash)
if err != nil {
return NewErrorResponse(err)
}
diffTime := block.Timestamp - preBlock.Timestamp
if preBlock.Timestamp >= block.Timestamp {
diffTime = 1
}
hashCount := difficulty.CalcWork(block.Bits)
hashRate := new(big.Int).Div(hashCount, big.NewInt(int64(diffTime)))
blockHash := block.Hash()
resp := &getHashRateResp{
BlockHash: &blockHash,
BlockHeight: block.Height,
HashRate: hashRate.Uint64(),
}
return NewSuccessResponse(resp)
}
// MerkleBlockReq is used to handle getTxOutProof req
type MerkleBlockReq struct {
TxIDs []chainjson.HexBytes `json:"tx_ids"`
BlockHash chainjson.HexBytes `json:"block_hash"`
}
// GetMerkleBlockResp is resp struct for GetTxOutProof API
type GetMerkleBlockResp struct {
BlockHeader types.BlockHeader `json:"block_header"`
TxHashes []*bc.Hash `json:"tx_hashes"`
StatusHashes []*bc.Hash `json:"status_hashes"`
Flags []uint32 `json:"flags"`
MatchedTxIDs []*bc.Hash `json:"matched_tx_ids"`
}
func (a *API) getMerkleProof(ins MerkleBlockReq) Response {
blockReq := BlockReq{BlockHash: ins.BlockHash}
block, err := a.getBlockHelper(blockReq)
if err != nil {
return NewErrorResponse(err)
}
matchedTxs := getMatchedTx(block.Transactions, ins.TxIDs)
var matchedTxIDs []*bc.Hash
for _, tx := range matchedTxs {
matchedTxIDs = append(matchedTxIDs, &tx.ID)
}
hashes, compactFlags := types.GetTxMerkleTreeProof(block.Transactions, matchedTxs)
flags := make([]uint32, len(compactFlags))
for i, flag := range compactFlags {
flags[i] = uint32(flag)
}
blockHash := block.Hash()
statuses, err := a.chain.GetTransactionStatus(&blockHash)
if err != nil {
return NewErrorResponse(err)
}
statusHashes := types.GetStatusMerkleTreeProof(statuses.VerifyStatus, compactFlags)
resp := &GetMerkleBlockResp{
BlockHeader: block.BlockHeader,
TxHashes: hashes,
StatusHashes: statusHashes,
Flags: flags,
MatchedTxIDs: matchedTxIDs,
}
return NewSuccessResponse(resp)
}
func getMatchedTx(txs []*types.Tx, filterTxIDs []chainjson.HexBytes) []*types.Tx {
txIDSet := set.New()
for _, txID := range filterTxIDs {
hash := hexBytesToHash(txID)
txIDSet.Add(hash.String())
}
var matchedTxs []*types.Tx
for _, tx := range txs {
hashStr := tx.ID.String()
if txIDSet.Has(hashStr) {
matchedTxs = append(matchedTxs, tx)
}
}
return matchedTxs
}