@raydium-io/raydium-sdk-v2/src/raydium/launchpad/curve/func.ts

An SDK for building applications on top of Raydium.

import BN from "bn.js";
import Decimal from "decimal.js";


export class MathLaunch {
  static _Q64 = new Decimal(new BN(1).shln(64).toString())

  static _multipler(decimals: number) {
    return new Decimal(10).pow(decimals)
  }

  static getPrice({priceX64, decimalA, decimalB}: {priceX64: BN, decimalA: number, decimalB: number}){
    const priceWithDecimals = new Decimal(priceX64.toString()).div(this._Q64)
    const price = priceWithDecimals.mul(this._multipler(decimalA)).div(this._multipler(decimalB))

    return price
  }

  static getPriceX64({price, decimalA, decimalB}: {price: Decimal, decimalA: number, decimalB: number}) {
    const priceWithDecimals = price.mul(this._multipler(decimalB)).div(this._multipler(decimalA))
    const priceX64 = new BN(priceWithDecimals.mul(this._Q64).toFixed(0))
    return priceX64
  }
}

export function checkPoolToAmm({supply, totalFundRaisingB, totalLockedAmount, totalSellA, migrateType ,decimalsA}: {
  supply: BN, totalSellA: BN, totalLockedAmount: BN, totalFundRaisingB: BN, migrateType: 'amm' | 'cpmm', decimalsA: number,
}) {
  const migrateAmountA = supply.sub(totalSellA).sub(totalLockedAmount)
  const liquidity = new BN(new Decimal(migrateAmountA.mul(totalFundRaisingB).toString()).sqrt().toFixed(0))

  if (migrateType === 'amm') {
    if (liquidity.gt(new BN(10).pow(new BN(decimalsA)))) return true
  } else if (migrateType === 'cpmm') {
    if (liquidity.gt(new BN(100))) return true
  } else {
    throw Error('migrate type error')
  }

  return false
}