SDK prepares data for old router

[just2102]

This has already been reported here in the old repo:
Uniswap/v3-sdk#199
here I'll provide a more detailed explanation of the bug because it literally took me a whole day to figure this out (thanks @allush for the issue)

The current SDK version ("@uniswap/v3-sdk": "^3.11.2") does not allow swaps for Router 2 because it does not allow to construct correct swapCallParameters.

Steps to reproduce:

import { abi as SWAP_ROUTER_ABI } from "@uniswap/v3-periphery/artifacts/contracts/SwapRouter.sol/SwapRouter.json";

    const options: SwapOptions = {
      slippageTolerance: new Percent(50, 10_000), // 50 bips, or 0.50%
      deadline: Math.floor(Date.now() / 1000) + 60 * 20, // 20 minutes from the current Unix time
      recipient: address,
    };

   const methodParameters = SwapRouter.swapCallParameters([uncheckedTrade], options);

    const tuple = {
      tokenIn: fromToken.address,
      tokenOut: toToken.address,
      fee: poolFee,
      recipient: address,
      amountIn: fromReadableAmount(amountIn, fromToken.decimals),
      deadline: options.deadline,
      amountOutMinimum: 0,
      sqrtPriceLimitX96: 0,
    };

    const customCalldata = encodeFunctionData({
      abi: SWAP_ROUTER_ABI,
      functionName: "exactInputSingle",
      args: [tuple],
    });

import { SWAP_ROUTER_02_ADDRESSES } from "@uniswap/sdk-core";
 const swapRouterAddress = SWAP_ROUTER_02_ADDRESSES(chainId);

    const result = await sendTransaction(wagmiConfig, {
      account: address,
      to: swapRouterAddress,
      value: BigInt(methodParameters.value),
      data: customCalldata,
    });

I use wagmi in this example, but it doesn't matter.
The fix to this would be to use the old SwapRouter (https://docs.uniswap.org/contracts/v3/reference/deployments/ethereum-deployments)
I didn't manage to get it working with the new SwapRouter 2 because of this error:

Versions used:
"@uniswap/sdk-core": "^5.0.0",
"@uniswap/v3-sdk": "^3.11.2",

[wade-liwei]

hey bro

Could you please give me an example about how to use the sdks universal router?

[karcreativeworks]

This issue is fixed in PR #196 but until it's verified & merged, you can copy the swaprouter.ts file manually into your repo to construct correct swapCallParameters ( especially for those who are working on base chain which only supports swaprouter02 )