ipld-eth-server/pkg/geth/converters/rpc/transaction_converter.go
2018-05-04 10:54:00 -05:00

91 lines
2.7 KiB
Go

package rpc
import (
"context"
"log"
"strings"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/types"
"golang.org/x/sync/errgroup"
"github.com/vulcanize/vulcanizedb/pkg/core"
vulcCommon "github.com/vulcanize/vulcanizedb/pkg/geth/converters/common"
)
type Client interface {
TransactionSender(ctx context.Context, tx *types.Transaction, block common.Hash, index uint) (common.Address, error)
TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error)
}
type RpcTransactionConverter struct {
client Client
}
func NewRpcTransactionConverter(client Client) *RpcTransactionConverter {
return &RpcTransactionConverter{client: client}
}
func (rtc *RpcTransactionConverter) ConvertTransactionsToCore(gethBlock *types.Block) ([]core.Transaction, error) {
var g errgroup.Group
coreTransactions := make([]core.Transaction, len(gethBlock.Transactions()))
for gethTransactionIndex, gethTransaction := range gethBlock.Transactions() {
//https://golang.org/doc/faq#closures_and_goroutines
transaction := gethTransaction
transactionIndex := uint(gethTransactionIndex)
g.Go(func() error {
from, err := rtc.client.TransactionSender(context.Background(), transaction, gethBlock.Hash(), transactionIndex)
if err != nil {
log.Println("transaction sender: ", err)
return err
}
coreTransaction := transToCoreTrans(transaction, &from)
coreTransaction, err = appendReceiptToTransaction(rtc.client, coreTransaction)
if err != nil {
log.Println("receipt: ", err)
return err
}
coreTransactions[transactionIndex] = coreTransaction
return nil
})
}
if err := g.Wait(); err != nil {
log.Println("transactions: ", err)
return coreTransactions, err
}
return coreTransactions, nil
}
func appendReceiptToTransaction(client Client, transaction core.Transaction) (core.Transaction, error) {
gethReceipt, err := client.TransactionReceipt(context.Background(), common.HexToHash(transaction.Hash))
if err != nil {
return transaction, err
}
receipt := vulcCommon.ToCoreReceipt(gethReceipt)
transaction.Receipt = receipt
return transaction, nil
}
func transToCoreTrans(transaction *types.Transaction, from *common.Address) core.Transaction {
data := hexutil.Encode(transaction.Data())
return core.Transaction{
Hash: transaction.Hash().Hex(),
Nonce: transaction.Nonce(),
To: strings.ToLower(addressToHex(transaction.To())),
From: strings.ToLower(addressToHex(from)),
GasLimit: transaction.Gas(),
GasPrice: transaction.GasPrice().Int64(),
Value: transaction.Value().String(),
Data: data,
}
}
func addressToHex(to *common.Address) string {
if to == nil {
return ""
}
return to.Hex()
}