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block.go
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block.go
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package services
import (
"context"
"fmt"
"math/big"
"sync"
"time"
"github.com/PositionExchange/posichain/hmy/tracers"
"github.com/PositionExchange/posichain/core"
"github.com/PositionExchange/posichain/core/state"
coreTypes "github.com/PositionExchange/posichain/core/types"
"github.com/coinbase/rosetta-sdk-go/server"
"github.com/coinbase/rosetta-sdk-go/types"
ethcommon "github.com/ethereum/go-ethereum/common"
lru "github.com/hashicorp/golang-lru"
"github.com/PositionExchange/posichain/core/rawdb"
hmytypes "github.com/PositionExchange/posichain/core/types"
"github.com/PositionExchange/posichain/core/vm"
"github.com/PositionExchange/posichain/eth/rpc"
"github.com/PositionExchange/posichain/hmy"
"github.com/PositionExchange/posichain/rosetta/common"
stakingTypes "github.com/PositionExchange/posichain/staking/types"
)
const (
// txTraceCacheSize is max number of transaction traces to keep cached
txTraceCacheSize = 1e5
)
// BlockAPI implements the server.BlockAPIServicer interface.
type BlockAPI struct {
hmy *hmy.Harmony
txTraceCache *lru.Cache
}
// NewBlockAPI creates a new instance of a BlockAPI.
func NewBlockAPI(hmy *hmy.Harmony) server.BlockAPIServicer {
traceCache, _ := lru.New(txTraceCacheSize)
return &BlockAPI{
hmy: hmy,
txTraceCache: traceCache,
}
}
// BlockMetadata ..
type BlockMetadata struct {
Epoch *big.Int `json:"epoch"`
}
// Block implements the /block endpoint
func (s *BlockAPI) Block(
ctx context.Context, request *types.BlockRequest,
) (response *types.BlockResponse, rosettaError *types.Error) {
if err := assertValidNetworkIdentifier(request.NetworkIdentifier, s.hmy.ShardID); err != nil {
return nil, err
}
var blk *hmytypes.Block
var currBlockID, prevBlockID *types.BlockIdentifier
if blk, rosettaError = getBlock(ctx, s.hmy, request.BlockIdentifier); rosettaError != nil {
return nil, rosettaError
}
currBlockID = &types.BlockIdentifier{
Index: blk.Number().Int64(),
Hash: blk.Hash().String(),
}
if blk.NumberU64() == 0 {
prevBlockID = currBlockID
} else {
prevBlock, err := s.hmy.BlockByNumber(ctx, rpc.BlockNumber(blk.Number().Int64()-1))
if err != nil {
return nil, common.NewError(common.CatchAllError, map[string]interface{}{
"message": err.Error(),
})
}
prevBlockID = &types.BlockIdentifier{
Index: prevBlock.Number().Int64(),
Hash: prevBlock.Hash().String(),
}
}
// Report any side effect transaction now as it can be computed & cached on block fetch.
transactions := []*types.Transaction{}
if s.containsSideEffectTransaction(ctx, blk) {
tx, rosettaError := s.getSideEffectTransaction(ctx, blk)
if rosettaError != nil {
return nil, rosettaError
}
transactions = append(transactions, tx)
}
metadata, err := types.MarshalMap(BlockMetadata{
Epoch: blk.Epoch(),
})
if err != nil {
return nil, common.NewError(common.CatchAllError, map[string]interface{}{
"message": err.Error(),
})
}
responseBlock := &types.Block{
BlockIdentifier: currBlockID,
ParentBlockIdentifier: prevBlockID,
Timestamp: blk.Time().Int64() * 1e3, // Timestamp must be in ms.
Transactions: transactions,
Metadata: metadata,
}
otherTransactions := []*types.TransactionIdentifier{}
for _, tx := range blk.Transactions() {
otherTransactions = append(otherTransactions, &types.TransactionIdentifier{
Hash: tx.Hash().String(),
})
}
for _, tx := range blk.StakingTransactions() {
otherTransactions = append(otherTransactions, &types.TransactionIdentifier{
Hash: tx.Hash().String(),
})
}
// Report cross-shard transaction payouts.
for _, cxReceipts := range blk.IncomingReceipts() {
for _, cxReceipt := range cxReceipts.Receipts {
otherTransactions = append(otherTransactions, &types.TransactionIdentifier{
Hash: cxReceipt.TxHash.String(),
})
}
}
return &types.BlockResponse{
Block: responseBlock,
OtherTransactions: otherTransactions,
}, nil
}
// BlockTransaction implements the /block/transaction endpoint
func (s *BlockAPI) BlockTransaction(
ctx context.Context, request *types.BlockTransactionRequest,
) (*types.BlockTransactionResponse, *types.Error) {
if err := assertValidNetworkIdentifier(request.NetworkIdentifier, s.hmy.ShardID); err != nil {
return nil, err
}
blk, rosettaError := getBlock(
ctx, s.hmy, &types.PartialBlockIdentifier{Hash: &request.BlockIdentifier.Hash},
)
if rosettaError != nil {
return nil, rosettaError
}
txHash := ethcommon.HexToHash(request.TransactionIdentifier.Hash)
txInfo, rosettaError := s.getTransactionInfo(ctx, blk, txHash)
if rosettaError != nil {
// If no transaction info is found, check for side effect case transaction.
response, rosettaError2 := s.sideEffectBlockTransaction(ctx, request)
if rosettaError2 != nil && rosettaError2.Code != common.TransactionNotFoundError.Code {
return nil, common.NewError(common.TransactionNotFoundError, map[string]interface{}{
"from_error": rosettaError2,
})
}
return response, rosettaError2
}
state, _, err := s.hmy.StateAndHeaderByNumber(ctx, rpc.BlockNumber(blk.NumberU64()))
if state == nil || err != nil {
return nil, common.NewError(common.BlockNotFoundError, map[string]interface{}{
"message": fmt.Sprintf("block state not found for block %v", blk.NumberU64()),
})
}
var transaction *types.Transaction
if txInfo.tx != nil && txInfo.receipt != nil {
contractInfo := &ContractInfo{}
if _, ok := txInfo.tx.(*hmytypes.Transaction); ok {
// check for contract related operations, if it is a plain transaction.
if txInfo.tx.To() != nil {
// possible call to existing contract so fetch relevant data
contractInfo.ContractCode = state.GetCode(*txInfo.tx.To())
contractInfo.ContractAddress = txInfo.tx.To()
} else {
// contract creation, so address is in receipt
contractInfo.ContractCode = state.GetCode(txInfo.receipt.ContractAddress)
contractInfo.ContractAddress = &txInfo.receipt.ContractAddress
}
contractInfo.ExecutionResult, rosettaError = s.getTransactionTrace(ctx, blk, txInfo)
if rosettaError != nil {
return nil, rosettaError
}
}
transaction, rosettaError = FormatTransaction(txInfo.tx, txInfo.receipt, contractInfo, true)
if rosettaError != nil {
return nil, rosettaError
}
} else if txInfo.cxReceipt != nil {
transaction, rosettaError = FormatCrossShardReceiverTransaction(txInfo.cxReceipt)
if rosettaError != nil {
return nil, rosettaError
}
} else {
return nil, &common.TransactionNotFoundError
}
return &types.BlockTransactionResponse{Transaction: transaction}, nil
}
// transactionInfo stores all related information for any transaction on the Harmony chain
// Note that some elements can be nil if not applicable
type transactionInfo struct {
tx hmytypes.PoolTransaction
txIndex uint64
receipt *hmytypes.Receipt
cxReceipt *hmytypes.CXReceipt
}
// getTransactionInfo given the block hash and transaction hash
func (s *BlockAPI) getTransactionInfo(
ctx context.Context, blk *hmytypes.Block, txHash ethcommon.Hash,
) (txInfo *transactionInfo, rosettaError *types.Error) {
// Look for all of the possible transactions
var index uint64
var plainTx *hmytypes.Transaction
var stakingTx *stakingTypes.StakingTransaction
plainTx, _, _, index = rawdb.ReadTransaction(s.hmy.ChainDb(), txHash)
if plainTx == nil {
stakingTx, _, _, index = rawdb.ReadStakingTransaction(s.hmy.ChainDb(), txHash)
// if there both normal and staking transactions, correct index offset.
index = index + uint64(blk.Transactions().Len())
}
cxReceipt, _, _, _ := rawdb.ReadCXReceipt(s.hmy.ChainDb(), txHash)
if plainTx == nil && stakingTx == nil && cxReceipt == nil {
return nil, &common.TransactionNotFoundError
}
var receipt *hmytypes.Receipt
receipts, err := s.hmy.GetReceipts(ctx, blk.Hash())
if err != nil {
return nil, common.NewError(common.CatchAllError, map[string]interface{}{
"message": err.Error(),
})
}
if int(index) < len(receipts) {
receipt = receipts[index]
if cxReceipt == nil && receipt.TxHash != txHash {
return nil, common.NewError(common.CatchAllError, map[string]interface{}{
"message": "unable to find correct receipt for transaction",
})
}
}
// Use pool transaction for concise formatting
var tx hmytypes.PoolTransaction
if stakingTx != nil {
tx = stakingTx
} else if plainTx != nil {
tx = plainTx
}
return &transactionInfo{
tx: tx,
txIndex: index,
receipt: receipt,
cxReceipt: cxReceipt,
}, nil
}
var (
// defaultTraceReExec is the number of blocks the tracer can go back and re-execute to produce historical state.
// Only 1 block is needed to check for internal transactions
defaultTraceReExec = uint64(1)
// defaultTraceTimeout is the amount of time a transaction can execute
defaultTraceTimeout = (10 * time.Second).String()
// defaultTraceLogConfig is the log config of all traces
defaultTraceLogConfig = vm.LogConfig{
DisableMemory: false,
DisableStack: false,
DisableStorage: false,
Debug: false,
Limit: 0,
}
)
var ttLock *lru.Cache
func init() {
ttLock, _ = lru.New(10000)
}
// getTransactionTrace for the given txInfo.
func (s *BlockAPI) getTransactionTrace(
ctx context.Context, blk *hmytypes.Block, txInfo *transactionInfo,
) ([]*tracers.RosettaLogItem, *types.Error) {
cacheKey := blk.Hash().String() + txInfo.tx.Hash().String()
if value, ok := s.txTraceCache.Get(cacheKey); ok {
return value.([]*tracers.RosettaLogItem), nil
}
lock := &sync.Mutex{}
if ok, _ := ttLock.ContainsOrAdd(blk.Hash().String(), lock); ok {
if lockTmp, ok := ttLock.Get(blk.Hash().String()); ok {
lock = lockTmp.(*sync.Mutex)
} else {
lock = nil
}
}
if lock != nil {
lock.Lock()
defer lock.Unlock()
}
if value, ok := s.txTraceCache.Get(cacheKey); ok {
return value.([]*tracers.RosettaLogItem), nil
}
var blockError *types.Error
var foundResult []*tracers.RosettaLogItem
var tracer = "RosettaBlockTracer"
err := s.hmy.ComputeTxEnvEachBlockWithoutApply(blk, defaultTraceReExec, func(txIndex int, tx *coreTypes.Transaction, msg core.Message, vmctx vm.Context, statedb *state.DB) bool {
execResultInterface, err := s.hmy.TraceTx(ctx, msg, vmctx, statedb, &hmy.TraceConfig{
Tracer: &tracer,
LogConfig: &vm.LogConfig{
DisableMemory: true,
DisableStack: false,
DisableStorage: true,
Debug: false,
Limit: 0,
},
Timeout: &defaultTraceTimeout,
Reexec: &defaultTraceReExec,
})
if err != nil {
blockError = common.NewError(common.CatchAllError, map[string]interface{}{
"message": err.Error(),
})
return false
}
execResult, ok := execResultInterface.([]*tracers.RosettaLogItem)
if !ok {
blockError = common.NewError(common.CatchAllError, map[string]interface{}{
"message": "unknown tracer exec result type",
})
return false
}
if txInfo.tx.Hash().String() == tx.Hash().String() {
foundResult = execResult
}
cacheKey := blk.Hash().String() + tx.Hash().String()
s.txTraceCache.Add(cacheKey, execResult)
return true
})
if err != nil {
return nil, common.NewError(common.CatchAllError, map[string]interface{}{
"message": err.Error(),
})
}
if blockError != nil {
return nil, blockError
}
if foundResult == nil {
return nil, common.NewError(common.CatchAllError, map[string]interface{}{
"message": fmt.Errorf("transaction not found for block %#x", blk.Hash()),
})
}
return foundResult, nil
}
// getBlock ..
func getBlock(
ctx context.Context, hmy *hmy.Harmony, blockID *types.PartialBlockIdentifier,
) (blk *hmytypes.Block, rosettaError *types.Error) {
var err error
if blockID.Hash != nil {
requestBlockHash := ethcommon.HexToHash(*blockID.Hash)
blk, err = hmy.GetBlock(ctx, requestBlockHash)
} else if blockID.Index != nil {
blk, err = hmy.BlockByNumber(ctx, rpc.BlockNumber(*blockID.Index))
} else {
return nil, &common.BlockNotFoundError
}
if err != nil {
return nil, common.NewError(common.BlockNotFoundError, map[string]interface{}{
"message": err.Error(),
})
}
if blk == nil {
return nil, common.NewError(common.BlockNotFoundError, map[string]interface{}{
"message": "block not found for given block identifier",
})
}
return blk, nil
}