Encoding the params in swaprouter function error

[brinal8055]

Hi, I am trying to use multicall function in Uniswap V3 using ethers.js. I am stuck in one problem, my transaction are failing (https://etherscan.io/tx/0xd3b876420f97db7ddaa6309e7fc561906303892319cbf830444023fc5ca9d522). At the moment I am using two function swapExactTokensfortokens and RefundEth. I am encoding both these functions with contract.interface.encodeFunctionData() and again encoding the encoded data with multicall function. I think the problem is because Uniswap is not able to decode the encoded function (swapExactTokensfortokens). Here's my code :

---

const swapRouterContract = new ethers.Contract(
V3SwapRouterAddress,
V3SwapRouterABI.concat(PeripheryPaymentsABI).concat(MulticallABI).concat(ERC20MinimalABI).concat(V2Router02ABI),

signer
)

const params1 = {
tokenIn: tokenInParsed,
tokenOut: tokenOutParsed,
fee: 3000,
recipient: WALLET_ADDRESS,
deadline: Math.floor(Date.now() / 1000) + (60 * 10),
amountIn: amountInParsed.toHexString(),
amountOutMinimum: 0,
sqrtPriceLimitX96: 0
}

        const encData1 = swapRouterContract.interface.encodeFunctionData("exactInputSingle", [params1])

        const encData2 = swapRouterContract.interface.encodeFunctionData("refundETH", [])

        const calls = [encData1, encData2]
        const encMultiCall = swapRouterContract.interface.encodeFunctionData("multicall", [calls])
        const txArgs = {
            to: V3SwapRouterAddress,
            from: WALLET_ADDRESS,
            data: encMultiCall,
            maxFeePerGas: maxFeePerGasGweiHex.toHexString(),
            maxPriorityFeePerGas: maxPriorityFeePerGasGweiHex.toHexString(),
            gasLimit: gasFee,
            value: ethers.utils.parseEther("0.01")
        }

        const tx = await signer.sendTransaction(txArgs)
        console.log('tx', tx)
        const receipt = await tx.wait()

---

Can anyone please suggest where am I wrong ??

[burgossrodrigo]

Try to debug this with tenderly. Doesn't see that something is wrong or the problem is related to the params.

[brinal8055]

Thank you for reply. I think the issue is with encoder.
const abi = ['function swapExactTokensForTokens(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts)' ]
const iface = new ethers.utils.inferface(abi)
iface.getSighash(" swapExactTokensForToken")
this function returns 0x8803dbee but it is suppose to be 0x42712a67 (I deduced it from another transaction using same method).

[ubuntutest]

unfortunately I could not understand your problem, and I have another one that you seem to have solved.
I can't concatenate the ERC20MinimalABI.json file, it gives me many errors, could you tell me how you did it or do you share a copy of your file?

[zkpunc]

You will not need "from: WALLET_ADDRESS" in txArgs, when you use signer.