Send RawTx
Last updated
Last updated
package main
import (
"context"
"encoding/hex"
"fmt"
"math/big"
// directory of the generated code using the provided relay.proto file
pb "github.com/BlockRazorinc/relay_example/protobuf"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/rlp"
"google.golang.org/grpc"
)
// auth will be used to verify the credential
type Authentication struct {
apiKey string
}
func (a *Authentication) GetRequestMetadata(context.Context, ...string) (map[string]string, error) {
return map[string]string{"apiKey": a.apiKey}, nil
}
func (a *Authentication) RequireTransportSecurity() bool {
return false
}
func main() {
// blockrazor relay endpoint address
blzrelayEndPoint := "ip:port"
// auth will be used to verify the credential
auth := Authentication{
"your auth token",
}
// open gRPC connection to BlockRazor relay
var err error
conn, err := grpc.Dial(blzrelayEndPoint, grpc.WithInsecure(), grpc.WithPerRPCCredentials(&auth), grpc.WithWriteBufferSize(0), grpc.WithInitialConnWindowSize(128*1024))
if err != nil {
fmt.Println("error: ", err)
return
}
// use the Gateway client connection interface.
client := pb.NewGatewayClient(conn)
// create context
ctx := context.Background()
// replace with your address
from_private_address := "42b565……44d05c"
to_public_address := "0x4321……3f1c66"
// replace with your transaction data
nonce := uint64(1)
toAddress := common.HexToAddress(to_public_address)
var data []byte
gasPrice := big.NewInt(1e9)
gasLimit := uint64(22000)
value := big.NewInt(0)
chainid := types.NewEIP155Signer(big.NewInt(56))
// create new transaction
tx := types.NewTransaction(nonce, toAddress, value, gasLimit, gasPrice, data)
privateKey, err := crypto.HexToECDSA(from_private_address)
if err != nil {
fmt.Println("fail to casting private key to ECDSA")
return
}
// sign transaction by private key
signedTx, err := types.SignTx(tx, chainid, privateKey)
if err != nil {
fmt.Println("fail to sign transaction")
return
}
// use rlp to encode your transaction
body, _ := rlp.EncodeToBytes([]types.Transaction{*signedTx})
// encode []byte to string
encode_tx := hex.EncodeToString(body)
// send raw tx by BlockRazor
res, err := client.SendTx(ctx, &pb.SendTxRequest{Transaction: encode_tx})
if err != nil {
fmt.Println("failed to send raw tx: ", err)
return
} else {
fmt.Println("raw tx sent by BlockRazor, tx hash is ", res.TxHash)
}
}curl <Endpoint_URL> \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_sendRawTransaction","params":["0x02f8……869514"],"id":1}'{
"tx_hash":"0x2944……b2188f"
}rpc error: code = Unknown desc = invalid transaction formatsyntax = "proto3";
package blockchain;
option go_package = "/Users/code/relay/grpcServer";
service Gateway {
rpc SendTx (SendTxRequest) returns (SendTxReply) {}
rpc SendTxs (SendTxsRequest) returns (SendTxsReply) {}
rpc NewTxs (TxsRequest) returns (stream TxsReply){}
rpc NewBlocks (BlocksRequest) returns (stream BlocksReply){}
}
message TxsRequest{
bool node_validation = 1;
}
message Tx{
bytes from = 1;
int64 timestamp = 2;
bytes raw_tx = 3;
}
message TxsReply{
Tx tx = 1;
}
message BlocksRequest{
bool node_validation = 1;
}
message BlockHeader{
string parent_hash = 1;
string sha3_uncles = 2;
string miner = 3;
string state_root = 4;
string transactions_root = 5;
string receipts_root = 6;
string logs_bloom = 7;
string difficulty = 8;
string number = 9;
uint64 gas_limit = 10;
uint64 gas_used = 11;
uint64 timestamp = 12;
bytes extra_data = 13;
string mix_hash = 14;
uint64 nonce = 15;
uint64 base_fee_per_gas = 16;
string withdrawals_root = 17;
uint64 blob_gas_used = 18;
uint64 excess_blob_gas = 19;
string parent_beacon_block_root = 20;
}
message NextValidator{
string block_height = 1;
string coinbase = 2;
}
message BlocksReply{
string hash = 1;
BlockHeader header = 2;
repeated NextValidator nextValidator = 3;
repeated Tx txs = 4;
}
message Transaction {
string content = 1;
}
message Transactions {
repeated Transaction transactions = 1;
}
message SendTxRequest {
string transaction = 1;
}
message SendTxsRequest {
string transactions = 1;
}
message SendTxReply {
string tx_hash = 1;
}
message SendTxsReply {
repeated string tx_hashs = 1;
}