orca.ts

  public async calculateSwapPrice(poolAddress: PublicKey): Promise<Big> {
    // calculate swap for normal orca lp pool
    try {
      const [pool, poolParameters, tokenA, tokenB] = this.getPool(poolAddress);

      const quote = await pool.getQuote(
        tokenA,
        new Decimal(1), // swap amount of tokenA to tokenB
        new Decimal(0.5) // allowable slippage
      );
      const rate = quote.getRate();
      return fromDecimal(rate);
    } catch (error: any) {
      if (!(error instanceof FailedToFindOrcaPool)) {
        throw error;
      }
    }
    // calculate swap for whirlpool
    const pool = await this.whirlpool.getPool(poolAddress, true);
    if (!pool) {
      throw new Error(`Failed to find Orca LP Pool for ${poolAddress}`);
    }
    const poolData = pool.getData();
    const tokenA: TokenInfo = pool.getTokenAInfo();
    const tokenB: TokenInfo = pool.getTokenBInfo();
    const price = PriceMath.sqrtPriceX64ToPrice(
      poolData.sqrtPrice,
      tokenA.decimals,
      tokenB.decimals
    );

    return fromDecimal(price);
  }