第4节：SendRawTx转账

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  1. 构建交易
  2. 交易签名
  3. rlp解码成bytes
  4. rlp解码成string
  5. 发送rawTx
package main

import (
    "context"
    "crypto/ecdsa"
    "encoding/hex"
    "fmt"
    "log"
    "math/big"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/ethclient"
    "github.com/ethereum/go-ethereum/rlp"

    utils "code/main/utils"
)

func main() {
    client, err := ethclient.Dial(utils.BscTestnetRpc)
    if err != nil {
        log.Fatal(err)
    }

    privateKey, err := crypto.HexToECDSA(utils.HardhatPrivateKey)
    if err != nil {
        log.Fatal(err)
    }

    publicKey := privateKey.Public()
    publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey)
    if !ok {
        log.Fatal("cannot assert type: publicKey is not of type *ecdsa.PublicKey")
    }

    fromAddress := crypto.PubkeyToAddress(*publicKeyECDSA)
    nonce, err := client.PendingNonceAt(context.Background(), fromAddress)
    if err != nil {
        log.Fatal(err)
    }

    value := big.NewInt(100000000000000) // in wei (0.001 eth)
    gasLimit := uint64(21000)            // in units
    gasPrice, err := client.SuggestGasPrice(context.Background())
    if err != nil {
        log.Fatal(err)
    }

    toAddress := common.HexToAddress("0xE8191108261f3234f1C2acA52a0D5C11795Aef9E")
    var data []byte
    tx := types.NewTransaction(nonce, toAddress, value, gasLimit, gasPrice, data)

    chainID, err := client.NetworkID(context.Background())
    if err != nil {
        log.Fatal(err)
    }

    signedTx, err := types.SignTx(tx, types.NewEIP155Signer(chainID), privateKey)
    if err != nil {
        log.Fatal(err)
    }

    fmt.Println("signedTx:", signedTx)

    // *********** 以下内容不同 ！！************
    // 解析交易，获取rawTxData
    ts := types.Transactions{signedTx}
    rawTxBytes, _ := rlp.EncodeToBytes(ts[0])
    rawTxHex := hex.EncodeToString(rawTxBytes)
    fmt.Printf("rawTxHex Encode:\n", rawTxHex) // f86...772

    // 广播交易 rawTxData
    rawTxBytesDecode, err := hex.DecodeString(rawTxHex)
    fmt.Printf("rawTxHex Decode:\n", rawTxBytesDecode)

    txNew := new(types.Transaction)
    rlp.DecodeBytes(rawTxBytesDecode, &txNew)

    err = client.SendTransaction(context.Background(), txNew)
    if err != nil {
        log.Fatal(err)
    }

    // https://testnet.bscscan.com/tx/0xe5e6f9397365298f131a2e51aa5b85bb7a7deb8b2864417f926a9cc271156220
    fmt.Printf("txNew sent: %s", txNew.Hash().Hex())
}

执行结果，点击查看

image-20221130154339000