第3节：SendTx转账

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  1. 构造交易，转账0.01ETH
  2. 私钥签名
  3. 广播签名交易
package main

import (
    "context"
    "crypto/ecdsa"
    "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"

    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(10000000000000000) // in wei (0.01 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)
    }

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

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

    // https://testnet.bscscan.com/tx/0x07ed05b331dd9668fc4f80fee155d08a8d819194750b34469014adc368667070
    fmt.Printf("tx sent: %s", signedTx.Hash().Hex())
}

执行结果，点击查看

image-20221130151255527