How to assign a type to a list of required function arguments-CodePudding

I have the following code

  poolContract.on(
    "Swap",
    (sender, recipient, amount0, amount1, sqrtPriceX96, liquidity, tick) => {
      console.log({
        sender: sender,
        receipient: recipient,
        amount0: ethers.utils.formatUnits(amount0, 6),
        amount1: ethers.utils.formatUnits(amount1, 18),
        sqrtPriceX96: sqrtPriceX96,
        liquidity: liquidity,
        tick: tick,
      });
    }
  );

I want to assign this type to the function arguments:

export type Swap = {
  sender: string;
  recipient: string;
  amount0: BigNumber;
  amount1: BigNumber;
  sqrtPriceX96: BigNumber;
  liquidity: BigNumber;
  tick: number;
};

When I perform

  poolContract.on(
    "Swap",
    (swap: Swap) => {
      console.log({
        sender: sender,
        receipient: recipient,
        amount0: ethers.utils.formatUnits(amount0, 6),
        amount1: ethers.utils.formatUnits(amount1, 18),
        sqrtPriceX96: sqrtPriceX96,
        liquidity: liquidity,
        tick: tick,
      });
    }
  );

The type does not get assigned. What operation can I perform to assign the function arguments the Swap type.

CodePudding user response：

How was this poolContract get initialized? Its on function might not have the correct type assertion. For example, if your poolContract is created from a class Contract like this

class Contract {
   on: (name: string, fn: () => void)
}

The swap argument in your code will not be assigned to a type

CodePudding user response：

Its okay, what I ended up doing was declaring a const in the function and enforced the type as such:

      const swap: Swap = {
        sender: sender,
        recipient: recipient,
        amount0: amount0,
        amount1: amount1,
        sqrtPriceX96: sqrtPriceX96,
        liquidity: liquidity,
        tick: tick,
      };

The poolContract.on() function comes from an external library.