@dojima-wallet/connection/lib/swap_utils/output.ts

Initialise and connection for layer 1&2 blockchain

import { PoolData } from "./types";

// Calculate swap output with slippage
export const calcSwapOutput = (
  inputAmount: number,
  pool: PoolData,
  toDoj: boolean
): number => {
  // formula: (inputAmount * inputBalance * outputBalance) / (inputAmount + inputBalance) ^ 2
  const inputBalance = toDoj
    ? Number(pool.balance_asset)
    : Number(pool.balance_doj); // input is asset if toDoj
  const outputBalance = toDoj
    ? Number(pool.balance_doj)
    : Number(pool.balance_asset); // output is doj if toDoj
  const numerator = inputAmount * inputBalance * outputBalance;
  const denominator = Math.pow(inputAmount + inputBalance, 2);
  const result = numerator / denominator;
  return result;
};

export const calcDoubleSwapOutput = (
  inputAmount: number,
  pool1: PoolData,
  pool2: PoolData
): number => {
  // formula: calcSwapOutput(pool1) => calcSwapOutput(pool2)
  const r = calcSwapOutput(inputAmount, pool1, true);
  const output = calcSwapOutput(r, pool2, false);
  return output;
};