BTC Mining Calculator

gistfile1.md

BitCoin Mining Calcuator

• Code:

    float price =nowBean.getPrice();  
    float elecPriceFloat = nowBean.getElecPrice(); 
    float deviceCostFloat = nowBean.getDeviceCost();
    float currency = nowBean.getCurrency();
    String unitString = "";
    
    // /
    BigDecimal difficulty = new
                BigDecimal(nowBean.getDifficulty());
  
    // common
    BigDecimal gToBigDecimal = new
                BigDecimal(1000).pow(3);
    BigDecimal twoPow32 = new      
                BigDecimal("4294967296");
  
    //
    BigDecimal coinPrice = new BigDecimal(price);
  
    // / G unit
    BigDecimal calAbility = new 
                BigDecimal(nowBean.getCalability());
  
    BigDecimal blockTimeSecond = 
                difficulty.multiply(twoPow32).divide(
    		    calAbility.multiply(gToBigDecimal),  
    		    DECIMAL_SCALE,
    		BigDecimal.ROUND_DOWN);
    BigDecimal blockTimeHour = 
                blockTimeSecond.divide(new     
                BigDecimal(3600),
    		DECIMAL_SCALE, BigDecimal.ROUND_DOWN);
  
    // input
    BigDecimal deviceCost = new 
                BigDecimal(deviceCostFloat);
  
    BigDecimal elecPrice = new 
                BigDecimal(elecPriceFloat);
  
    // w unit
    BigDecimal devicePower = new 
                BigDecimal(nowBean.getDevicePower());
    BigDecimal devicePowerInKw =  
                devicePower.divide(new 
                 BigDecimal(1000),
    		DECIMAL_SCALE, BigDecimal.ROUND_DOWN);
  
    // output
    BigDecimal deviceCostPerG = 
                deviceCost.divide(calAbility,
    		DECIMAL_SCALE, BigDecimal.ROUND_DOWN);
    BigDecimal elecCostPerG =  
              devicePowerInKw.multiply(elecPrice)
              .divide(calAbility, DECIMAL_SCALE,   
           BigDecimal.ROUND_DOWN);
  
    BigDecimal coinPerDay = (new BigDecimal(25)
    	       .multiply(new 
    	       BigDecimal(24))).divide(blockTimeHour,
    		DECIMAL_SCALE, BigDecimal.ROUND_DOWN);
  
    BigDecimal moneyPerDay = 
              coinPerDay.multiply(coinPrice);
  
    //  about time distance
    BigDecimal diffChangeCycle = new BigDecimal(
    		nowBean.getDiffChangeCycle());
    // 
    BigDecimal diffGrowPercent = new BigDecimal(
    		nowBean.getDiffGrowPercent());
  
    //  local logic
    long nextDiffTimeInSecond = 
                Long.parseLong(nowBean
    		.getNextDifficultyTime());
  
    long nextDiffTimeInDay = nextDiffTimeInSecond / 
                  3600 / 24;
  
    BigDecimal nextDiffTime = new 
             BigDecimal(nextDiffTimeInDay);
  
    BigDecimal elecCostPerDay = 
             elecPrice.multiply(devicePowerInKw)
    		.multiply(new BigDecimal(24));
  

• Explain

    输入变量：
      算力
      btc价格
      电价
      设备价格
      汇率
      
    btc变量：
      难度
      
    算法：
      区块时间 = 难度 * 2^32 / 算力
      每日获取的币 = 24小时 / 区块时间 * 每个区块得到的币
      设备成本 = 设备价格 / 算力
      电力成本 = 电力价格 / 算力
      每日净利润 = 每日获取的币 * btc价格 - 每日电力成本
      回本时间 = 设备成本 / 每日净利润
      
    
  

• 附加说明

  1.关于每个区块得到的币：

    目前为25个币/区块，以后会进行调整，但调整周期较长，目前不考虑这种情况
  

  2.关于难度调整：

    对于btc,难度调整的周期为11天左右，具体周期会浮动，目前未找到相应算法，所以以11天作为周期
  

• 参考

  1.比特币基础教学之：BLOCK产生难度及挖矿

  2.Bitcoinwidsom BTC Calculator