PoolTogether v5 Hyperstructure - Arbitrage Bot, Optimal Amount Ins

pt-v5-arb-4-optimal-amount-in.ts

import { BigNumber, ethers } from 'ethers';
import { Contract } from 'ethers';
import { Provider } from '@ethersproject/providers';
import { getLiquidationPairComputeExactAmountInMulticall }
  from '@generationsoftware/pt-v5-autotasks-library';

const { amountIn, amountInMin, wantedAmountsIn } = await calculateAmountIn(
  readProvider,
  liquidationPairContract,
  originalMaxAmountOut,
  wantedAmountsOut,
);

// Calculates optimal input parameters for the swap call based on current
// state of the auction
const calculateAmountIn = async (
  readProvider: Provider,
  liquidationPairContract: Contract,
  originalMaxAmountOut: BigNumber,
  wantedAmountsOut: BigNumber[],
): Promise<{
  amountIn: BigNumber;
  amountInMin: BigNumber;
  wantedAmountsIn: BigNumber[];
}> => {
  let wantedAmountsIn = [];

  const amountIn: BigNumber = await liquidationPairContract
    .callStatic.computeExactAmountIn(originalMaxAmountOut);

  const amountInMin = ethers.constants.MaxInt256;

  wantedAmountsIn = await getLiquidationPairComputeExactAmountInMulticall(
    liquidationPairContract,
    wantedAmountsOut,
    readProvider,
  );

  return {
    amountIn,
    amountInMin,
    wantedAmountsIn,
  };
};