Error: cannot estimate gas Pancake swap bot. #62
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This works const tx = await router.swapExactTokensForTokens( But now getting code: -32000, |
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I'm having the same issue |
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Were you able to solve this? |
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this gets me past the estimated gas issues |
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… On Wed, May 19, 2021 at 6:10 PM Martín Schere ***@***.***> wrote:
Were you able to solve this?
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But you are able to call |
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No I don’t care about that. I have hard coded the gas
…On Thu, May 20, 2021 at 7:43 AM Martín Schere ***@***.***> wrote:
But you are able to call getAmountsOut?
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Yes, but when I run your code I get the error in |
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You need to add BNB and WBNB in your test wallet
***************
const ethers = require(‘ethers’);
const addresses = {
WBNB: ‘0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c’,
BUSD: ‘0xe9e7cea3dedca5984780bafc599bd69add087d56’,
factory: ‘0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73’,
router: ‘0x10ed43c718714eb63d5aa57b78b54704e256024e’,
recipient: ‘’
}
//First address of this mnemonic must have enough BNB to pay for tx fess
const privateKey = ‘’;
const mygasPrice = ethers.utils.parseUnits(‘5’, ‘gwei’);
const provider = new ethers.providers.WebSocketProvider(‘wss://
muddy-young-frost.bsc.quiknode.pro/’);
const wallet = new ethers.Wallet(privateKey);
const account = wallet.connect(provider);
const factory = new ethers.Contract(
addresses.factory,
[‘event PairCreated(address indexed token0, address indexed token1, address
pair, uint)’],
account
);
const router = new ethers.Contract(
addresses.router,
[
‘function getAmountsOut(uint amountIn, address[] memory path) public view
returns (uint[] memory amounts)’,
‘function swapExactTokensForTokens(uint amountIn, uint amountOutMin,
address[] calldata path, address to, uint deadline) external returns
(uint[] memory amounts)’
],
account
);
const wbnb = new ethers.Contract(
addresses.WBNB,
[
‘function approve(address spender, uint amount) public returns(bool)’,
],
account
);
console.log(Before Approve);
const valueToapprove = ethers.utils.parseUnits(‘0.1’, ‘ether’);
const init = async () => {
const tx = await wbnb.approve(
router.address,
valueToapprove,
{
gasPrice: mygasPrice,
gasLimit: ‘162445’
}
);
console.log(After Approve);
const receipt = await tx.wait();
console.log(‘Transaction receipt’);
console.log(receipt);
}
factory.on(‘PairCreated’, async (token0, token1, pairAddress) => {
console.log(after factory.on:);
console.log( New pair detected ================= token0: ${token0} token1:
${token1} pairAddress: ${pairAddress} );
//The quote currency needs to be WBNB (we will pay with WBNB)
let tokenIn, tokenOut;
if(token0 === addresses.WBNB) {
tokenIn = token0;
tokenOut = token1;
}
if(token1 == addresses.WBNB) {
tokenIn = token1;
tokenOut = token0;
}
//The quote currency is not WBNB
if(typeof tokenIn === ‘undefined’) {
return;
}
//We buy for 0.1 BNB of the new token
//ethers was originally created for Ethereum, both also work for BSC
//‘ether’ === ‘bnb’ on BSC
console.log(line 87);
const amountIn = ethers.utils.parseUnits(‘0.01’, ‘ether’);
const amounts = await router.getAmountsOut(amountIn, [tokenIn, tokenOut]);
//Our execution price will be a bit different, we need some flexbility
const amountOutMin = amounts[1].sub(amounts[1].div(10));
console.log(line 92);
console.log( Buying new token ================= tokenIn: ${amountIn}
${tokenIn} (WBNB) tokenOut: ${amountOutMin} ${tokenOut} );
console.log(line 101);
const tx = await router.swapExactTokensForTokens(
amountIn,
amountOutMin,
[tokenIn, tokenOut],
addresses.recipient,
Math.floor(Date.now() / 1000) + 60 * 20, // 20 minutes from the current
Unix time
{
gasPrice: mygasPrice,
gasLimit: 162445
}
);
console.log(line 117);
const receipt = await tx.wait();
console.log(‘Transaction receipt’);
console.log(receipt);
});
init();
…On Thu, May 20, 2021 at 8:18 AM Martín Schere ***@***.***> wrote:
Yes, but when I run your code I get the error in getAmountsOut like I do
when I run mine
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Thank you. It very helpful for me :) I'm a developer but stuck after 2 hours research |
Hi, I am facing the same issue, and I have transferred a small amount of WBNB and definitely have BNB in my wallet. However, I am still getting this error. Currently setting mygasFee as
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Okay I added different gas prices for the approval and swap request, and the transaction went through, but I am still receiving a |
I am looking to add .gasLimit and or .gasPrice to solve the estimate gas error..
I get the WBNB approval to work but then the script errors with estimate gas during the swap
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