Как получить расчетный газ перед отправкой транзакции?
Как получить «расчетный газ» с помощью функции swapExactETHForTokens? Как показано в метамаске (прежде, чем можно будет принять покупку)
Умная сеть Binance (BSC)
Из контракта pancakeswap (https://bscscan.com/address/0x10ed43c718714eb63d5aa57b78b54704e256024e#writeContract) в функции номер 10 вы можете покупать токены с помощью swapExactETHForTokens, а в функции номер 14 вы можете продавать токены с помощью swapExact
Когда вы пытаетесь совершить транзакцию, когда хотите купить или продать, и это невозможно, тогда выясняется, что расходы на плату за газ составляют «0,3» или «0,4», что указывает на наличие ошибки (и очевидно не надо принимать)
В этом примере это связано с тем, что я пытаюсь купить токены, когда в токене НЕ определена цена / у него нет ликвидности в BNB, поэтому отображается плата за газ в размере 0,3 миллиарда долларов (ошибка)
Я автоматизировал "покупать" и "продавать" через BOT, который, используя функции, упомянутые выше, помогает мне выполнять эти процессы. Как мне получить это значение «предполагаемого газа», как показано в примере в «Метамаске»? но используя web3 или эфиры!
Я пробовал "EstimateGas" в эфирах, но он возвращает нормальное значение газа, а не такое, как в примере с метамаской 0,3 млрд.
let test = async () => {
const provider_ = new ethers.providers.WebSocketProvider(data.Wss_Nodo); //Nodo Private
let tokenAbi_ = [{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint256","name":"_decimals","type":"uint256"},{"internalType":"uint256","name":"_supply","type":"uint256"},{"internalType":"uint256","name":"_txFee","type":"uint256"},{"internalType":"uint256","name":"_burnFee","type":"uint256"},{"internalType":"uint256","name":"_charityFee","type":"uint256"},{"internalType":"address","name":"_FeeAddress","type":"address"},{"internalType":"address","name":"tokenOwner","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"FeeAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_BURN_FEE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_CHARITY_FEE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_TAX_FEE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tAmount","type":"uint256"}],"name":"deliver","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"excludeAccount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"includeAccount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"isCharity","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"isExcluded","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tAmount","type":"uint256"},{"internalType":"bool","name":"deductTransferFee","type":"bool"}],"name":"reflectionFromToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"setAsCharityAccount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"rAmount","type":"uint256"}],"name":"tokenFromReflection","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalBurn","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalCharity","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalFees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_txFee","type":"uint256"},{"internalType":"uint256","name":"_burnFee","type":"uint256"},{"internalType":"uint256","name":"_charityFee","type":"uint256"}],"name":"updateFee","outputs":[],"stateMutability":"nonpayable","type":"function"}];
const address_ = "0x3A7bf1305D0561b4E0363E6a262096c77C7CB5Db"; //My Wallet Test
const erc20 = new ethers.Contract(address_, tokenAbi_, provider_);
const recipient = "0x36953b5ec00a13edceceb3af258d034913d2a79d"; //Token Test
const estimation = await erc20.estimateGas.transfer(recipient, 100);
console.log(estimation) // BigNumber { _hex: '0x5444', _isBigNumber: true } (21572)
}
Видно я делаю не так :( Помогите, пожалуйста !!
2 ответа
я использую web3 для оценки газа, он работает только тогда, когда я переношу токены из кошелька в другой, но при тестировании на чеканке я получаю сообщение об ошибке:
let estimated_gas = await web3.eth.estimateGas({
'from': WalletAddress,
'to': ContractAddress,
'value': web3.utils.toHex(web3.utils.toWei('0.0035', 'ether')),
'data': contract.methods.mint.encodeABI(),
"gasPrice": web3.utils.toHex(gas_fee),
});
и я получаю эту ошибку:
Error: Returned error: execution reverted: Value below required mint fee for the amount
не уверен, что я делаю неправильно
Для совершения свопа вы должны оценитьГаз за своп, а не за перевод как вы сделали!