Error: Transaction failed CALL_EXCEPTION

[Suvanch]

Hi everyone!

I try to interact with uniswap and I face this error :
CALL_EXCEPTION (Error):

Error: transaction failed [ See: https://links.ethers.org/v5-errors-CALL_EXCEPTION ] (transactionHash="0xb17177588c1966e8597697cbcfff21257418bfa05162a351a60ca84ca1770fb1", transaction={"nonce":72,"gasPrice":{"type":"BigNumber","hex":"0x012a05f200"},"gasLimit":{"type":"BigNumber","hex":"0x04baf0"},"to":"0x10ED43C718714eb63d5aA57B78B54704E256024E","value":{"type":"BigNumber","hex":"0x00"},"data":"0x38ed1d56","chainId":56,"v":147,"r":"0x59b106d731f738ecffa30cd28fd339337ea9c46d60b665b251ef4def405d8649","s":"0x168ea064959487fc2c176de9731cc1fd47490ba7573857f08ba8869ec33d39ce","from":"0x3f9Ad8DB31A64813C3F97B02fc49959B123880BE","hash":"0xb17177588c1966e8597697cbcfff21257418bfa05162a351a60ca84ca1770fb1","type":null,"confirmations":0}, receipt={"to":"0x10ED43C718714eb63d5aA57B78B54704E256024E","from":"0x3f9Ad8DB31A64813C3F97B02fc49959B123880BE","contractAddress":null,"transactionIndex":42,"gasUsed":{"type":"BigNumber","hex":"0x8883"},"logsBloom":"0x0000","blockHash":"0x1b92db603ba6abfe1188cff561c1986d82ad9bad6a83cf9165a7d5a5c80f0ff0","transactionHash":"0xb17177588c1966e8597697cbcfff21257418bfa05162a351a60ca84ca1770fb1","logs":[],"blockNumber":20415450,"confirmations":1,"cumulativeGasUsed":{"type":"BigNumber","hex":"0x3dfed7"},"status":0,"type":0,"byzantium":true}, code=CALL_EXCEPTION, version=providers/5.6.8)
    at Logger.makeError (C:\Users\suvan\Desktop\New folder\TarzanBot\node_modules\@ethersproject\logger\lib\index.js:233:21)
    at Logger.throwError (C:\Users\suvan\Desktop\New folder\TarzanBot\node_modules\@ethersproject\logger\lib\index.js:242:20)
    at WebSocketProvider.<anonymous> (C:\Users\suvan\Desktop\New folder\TarzanBot\node_modules\@ethersproject\providers\lib\base-provider.js:1683:36)
    at step (C:\Users\suvan\Desktop\New folder\TarzanBot\node_modules\@ethersproject\providers\lib\base-provider.js:48:23)
    at Object.next (C:\Users\suvan\Desktop\New folder\TarzanBot\node_modules\@ethersproject\providers\lib\base-provider.js:29:53)
    at fulfilled (C:\Users\suvan\Desktop\New folder\TarzanBot\node_modules\@ethersproject\providers\lib\base-provider.js:20:58) {

reason: 'transaction failed',
  code: 'CALL_EXCEPTION',
  transactionHash: '0xb17177588c1966e8597697cbcfff21257418bfa05162a351a60ca84ca1770fb1',
  transaction: {
    nonce: 72,
    gasPrice: BigNumber { _hex: '0x012a05f200', _isBigNumber: true },
    gasLimit: BigNumber { _hex: '0x04baf0', _isBigNumber: true },
    to: '0x10ED43C718714eb63d5aA57B78B54704E256024E',
    value: BigNumber { _hex: '0x00', _isBigNumber: true },
    data: '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',
    chainId: 56,
    v: 147,
    r: '0x59b106d731f738ecffa30cd28fd339337ea9c46d60b665b251ef4def405d8649',
    s: '0x168ea064959487fc2c176de9731cc1fd47490ba7573857f08ba8869ec33d39ce',
    from: '0x3f9Ad8DB31A64813C3F97B02fc49959B123880BE',
    hash: '0xb17177588c1966e8597697cbcfff21257418bfa05162a351a60ca84ca1770fb1',
    type: null,
    confirmations: 0,
    wait: [Function (anonymous)]
  },
  receipt: {
    to: '0x10ED43C718714eb63d5aA57B78B54704E256024E',
    from: '0x3f9Ad8DB31A64813C3F97B02fc49959B123880BE',
    contractAddress: null,
    transactionIndex: 42,
    gasUsed: BigNumber { _hex: '0x8883', _isBigNumber: true },
    logsBloom: '0x0',
    blockHash: '0x1b92db603ba6abfe1188cff561c1986d82ad9bad6a83cf9165a7d5a5c80f0ff0',
    transactionHash: '0xb17177588c1966e8597697cbcfff21257418bfa05162a351a60ca84ca1770fb1',
    logs: [],
    blockNumber: 20415450,
    confirmations: 1,
    cumulativeGasUsed: BigNumber { _hex: '0x3dfed7', _isBigNumber: true },
    status: 0,
    type: 0,
    byzantium: true
  }
}

It happens when I call the swapExactTokensForTokens method. I searched for hours but I didn't understand what is and where is the issue. The approve function works but when I call swapExactTokensForTokens it fails.

Could you please help me?
My code :

const routerContract = new ethers.Contract(
    router,
    [
        'function getAmountsOut(uint amountIn, address[] memory path) public view returns(uint[] memory amounts)',
        'function swapExactETHForTokensSupportingFeeOnTransferTokens(uint256 amountOutMin,address[] path,address to,uint256 deadline )',
        'function swapExactTokensForTokens(uint amountIn,uint amountOutMin,address[] calldata path,address to,uint deadline) '
    ],
    signer
);


const bnbContract = new ethers.Contract(
    WBNB,
    [
        'function approve(address spender, uint256 amount) external returns (bool)'
    ],
    signer
) 
   const BNBamountIn = ethers.utils.parseUnits('.01', 18);
    let amounts = await routerContract.getAmountsOut(BNBamountIn, [WBNB, BUSD]);
    var amountOutMin = amounts[1].sub(amounts[1].div(10));

    console.log(ethers.utils.formatEther(BNBamountIn));
    console.log(ethers.utils.formatEther(amountOutMin));

    
    const approveTx = await bnbContract.approve(
        router,
        BNBamountIn
    );
    let reciept = await approveTx.wait();
    console.log(reciept);
    const swapTx = await routerContract.swapExactTokensForTokens(
        BNBamountIn,
        amountOutMin,
        [WBNB, BUSD],
        ME,
        Math.floor(Date.now() / 1000) + 60 * 20,
        {
            gasPrice: provider.getGasPrice(),
            gasLimit: 310000,
        }
    )

    

    let receipt = await swapTx.wait();
    console.log(receipt);
    

[zemse]

Just checked your tx on tenderly. It seems the issue is that the source wallet does not have enough WBNB funds.

[Anatolyjs]

did you find a solution to this problem?