Java BigDecimal getBtcToBuy(BigDecimal ask, BigDecimal bid, BigDecimal fee, BigDecimal scalpAmount)

Description

Get the amount of BTC that needs to be bought after selling the scalpped amount: x = A*N*(1-F) / B Where: A = Ask N = Scalp amount F = Transaction fees B = Bid

License

Open Source License

Declaration

public static BigDecimal getBtcToBuy(BigDecimal ask, BigDecimal bid,
        BigDecimal fee, BigDecimal scalpAmount) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.math.BigDecimal;

import java.math.RoundingMode;

public class Main {
    /**/*from   ww  w  .  j a  va2  s  .com*/
     * Get the amount of BTC that needs to be bought after selling the scalpped amount:
     * 
     * x = A*N*(1-F) / B
     * 
     * Where:
     *  
     * A = Ask
     * N = Scalp amount
     * F = Transaction fees
     * B = Bid
     * 
     * @return
     */
    public static BigDecimal getBtcToBuy(BigDecimal ask, BigDecimal bid,
            BigDecimal fee, BigDecimal scalpAmount) {
        BigDecimal one = new BigDecimal(1);
        BigDecimal oneMinusFee = one.subtract(fee);
        BigDecimal btcToBuy = ask.multiply(scalpAmount)
                .multiply(oneMinusFee).divide(bid, 8, RoundingMode.FLOOR);

        return btcToBuy;
    }
}

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