![](/img/trans.png)
[英]How can I Transfer ERC20 tokens from a smart contract without transfer to base account
[英]ERC-20 Token transfer problem: execution reverted: ERC20: transfer from the zero address
我最近一直在努力學習有關智能合約的知識,但是當我試圖了解代幣轉移的工作原理時,我遇到了這個問題。 || 執行恢復:ERC20:從零地址轉移 || (羅普森網絡)
編碼:
import (
"context"
"crypto/ecdsa"
"fmt"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethclient"
"golang.org/x/crypto/sha3"
"log"
"math/big"
)
func main() {
client, err := ethclient.Dial("https://ropsten.infura.io/v3")
if err != nil {
panic(err)
}
chainID, _ := client.NetworkID(context.Background())
privateKey, err := crypto.HexToECDSA("280a5fb7d2eef8c7956f4e6754c82a46f30496e43f50be4c8a457ef4e45fb1f4")
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(0)
toAddress := common.HexToAddress("0x0cFd37C2A1c9d0B8833fFE5a772003a350B5Be3f")
tokenAddress := common.HexToAddress("0x4f1c3F4D89826f27204769Af1617540c219E3A62")
transferFnSignature := []byte("transfer(address,uint256)")
hash := sha3.NewLegacyKeccak256()
hash.Write(transferFnSignature)
methodID := hash.Sum(nil)[:4]
fmt.Println(hexutil.Encode(methodID))
paddedAddress := common.LeftPadBytes(toAddress.Bytes(),32)
fmt.Println(hexutil.Encode(paddedAddress))
amount := new(big.Int)
amount.SetString("10000000000000000000", 10)
paddedAmount := common.LeftPadBytes(amount.Bytes(), 32)
fmt.Println(hexutil.Encode(paddedAmount))
var data []byte
data = append(data, methodID...)
data = append(data, paddedAddress...)
data = append(data, paddedAmount...)
gasLimit, err := client.EstimateGas(context.Background(), ethereum.CallMsg{
To: &tokenAddress,
Data: data,
})
if err != nil {
log.Fatal(err)
}
gasPrice, err := client.SuggestGasPrice(context.Background())
if err != nil {
log.Fatal(err)
}
fmt.Println(gasLimit)
tx := types.NewTx(&types.LegacyTx{
Nonce: nonce,
GasPrice: gasPrice,
Gas: gasLimit,
To: &tokenAddress,
Value: value,
Data: data,
V: nil,
R: nil,
S: nil,
})
signedTx, err := types.SignTx(tx, types.NewEIP155Signer(chainID),privateKey)
if err != nil {
log.Fatal(err)
}
err = client.SendTransaction(context.Background(), signedTx)
if err != nil {
log.Fatal(err)
}
fmt.Printf("TOKEN TX SENT! || %s ||", signedTx.Hash().Hex())
}
代幣地址是我的合約地址,fromAddress 是我持有 10000 個代幣的錢包,toAddress 是一個普通錢包。 我在這里錯過了什么?
顯然問題出在gasLimit上。 將 gasLimit 更改為gasLimit := uint64(200000)
並且它起作用了。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.