Node.js Web3/NodeJ不使用Pancakeswapv2上的SwapexactTokensForth
我在BSC上为BNB卖一只象征性的兔子真的有问题。 以下是我所知道的有效方法Node.js Web3/NodeJ不使用Pancakeswapv2上的SwapexactTokensForth,node.js,web3js,binance-smart-chain,Node.js,Web3js,Binance Smart Chain,我在BSC上为BNB卖一只象征性的兔子真的有问题。 以下是我所知道的有效方法 检查津贴表明我已批准在PCSv2路由器上交易兔子 增加津贴也是有效的 花费BNB购买BUNNY works(swapExactETHforTokens) 在BSC扫描上手动写入合同也有效 不起作用的是swapExactTokensForETH——它消耗了一些汽油,但吐出了: “从传输失败”。。。原因:“事务失败”,代码:“调用\u异常” 下面是node.js脚本中失败的事务 现在我所做的所有研究都表明,这是因为我需要
const ethers = require('ethers');
const Web3 = require('web3');
const abi = require('human-standard-token-abi');
const {ChainId, Token, TokenAmount, Fetcher: v2Fetcher, Pair, Route, Trade, TradeType, Percent} = require('@pancakeswap-libs/sdk-v2');
const {JsonRpcProvider} = require("@ethersproject/providers");
const url = 'https://bsc-dataseed1.binance.org/';
const provider = new JsonRpcProvider('https://bsc-dataseed1.binance.org/');
const web3 = new Web3(url);
const secretKey = process.env.SECRETKEY;
const walletAddress = process.env.WALLETADDRESS;
const wallet = ethers.Wallet.fromMnemonic(secretKey);
const account = wallet.connect(provider);
const pcsRouterV2 = Web3.utils.toChecksumAddress('0x10ED43C718714eb63d5aA57B78B54704E256024E'); //v2 router
const routerV2 = new ethers.Contract (pcsRouterV2, [
'function getAmountsOut(uint amountIn, address[] memory path) public view returns (uint[] memory amounts)',
'function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts)',
'function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts)',
'function swapExactTokensForTokens(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts)'
], account );
const bunnyAddress = Web3.utils.toChecksumAddress('0xc9849e6fdb743d08faee3e34dd2d1bc69ea11a51');
const wbnbAddress = Web3.utils.toChecksumAddress('0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c'); // WBNB
const gasApprovalLimit = 100000;
const gasTradingLimit = 250000;
const gasPrice = 5;
const getAllowance = async (tickerTokenAddress, thisWalletAddress, liquidtyPoolRouter) => {
var contract = new web3.eth.Contract(abi, tickerTokenAddress);
let approvalLimit = await contract.methods.allowance(thisWalletAddress, liquidtyPoolRouter).call();
let decimals = await contract.methods.decimals().call();
// this comes back with 3 variables, an approval, an approval in token units and the decimals
return [approvalLimit, approvalLimit / (10 ** decimals), decimals];
}
const getApproval = async (thisTokenAddress, approvalAmount, thisDecimals, walletAccount, liquidtyPoolRouter, thisGasPrice = gasPrice, thisGasLimit = gasApprovalLimit) => {
console.log(`getting approval`);
let contract = new ethers.Contract(thisTokenAddress, abi, walletAccount);
let approveResponse = await contract.approve(
liquidtyPoolRouter,
ethers.utils.parseUnits(approvalAmount.toString(), thisDecimals),
{
gasLimit: thisGasLimit,
gasPrice: ethers.utils.parseUnits(thisGasPrice.toString(), 'gwei')
});
console.log(approveResponse);
}
const swapExactBNBForTokens = async (buyAddress, buyDecimals, tokensIn, tradeSlippage, thisGasPrice = gasPrice, thisGasLimit = gasTradingLimit) => {
let amountIn = ethers.utils.parseUnits(tokensIn.toString(), buyDecimals);
let amounts = await routerV2.getAmountsOut(amountIn, [wbnbAddress, buyAddress]);
let amountOutMin = amounts[1].sub(amounts[1].mul(tradeSlippage).div(100));
let tx = await routerV2.swapExactETHForTokens(
amountOutMin,
[wbnbAddress, buyAddress],
walletAddress,
Date.now() + 1000 * 60 * 10,
{
value: amountIn,
gasLimit: thisGasLimit,
gasPrice: ethers.utils.parseUnits(thisGasPrice.toString(), 'gwei')
}
)
console.log(`Transaction Submitted...`);
let receipt = await tx.wait();
console.log(receipt);
}
const swapExactTokensForBNB = async (sellAddress, sellDecimals, tokensIn, tradeSlippage, thisGasPrice = gasPrice, thisGasLimit = gasTradingLimit) => {
let amountIn = ethers.utils.parseUnits(tokensIn.toString(), sellDecimals);
let amounts = await routerV2.getAmountsOut(amountIn, [sellAddress, wbnbAddress]);
let amountOutMin = amounts[1].sub(amounts[1].mul(tradeSlippage).div(100));
let tx = await routerV2.swapExactTokensForETH(
amountIn,
amountOutMin,
[sellAddress, wbnbAddress],
walletAddress,
Date.now() + 1000 * 60 * 10,
{
gasLimit: thisGasLimit,
gasPrice: ethers.utils.parseUnits(thisGasPrice.toString(), 'gwei')
}
)
console.log(`Transaction Submitted...`);
let receipt = await tx.wait();
console.log(receipt);
}
// USAGE
// swapExactBNBForTokens(bunnyAddress, 18, 0.3, 2); // spending 0.3 BNB to buy BUNNY
// swapExactTokensForBNB(bunnyAddress, 18, 3, 2); // spending 3 BUNNY to buy BNB
getAllowance(bunnyAddress, walletAddress, pcsRouterV2).then((value) => {console.log('V2 ' + value);});
这是您在tx:3299718614161746000中提供的金额
这是您在successfultx:3299718614161745787中提供的金额,它的数量更少
因此,我认为您提供的金额不正确,超过了您的余额。这太令人尴尬了,非常感谢