roundToDecimalPlaces 更新

[TzuHanLiang]

參考：

export const roundUp = (number: number, decimal: number, condition = false) => {
  if (SafeMath.eq(number, 0)) return `0.${'0'.repeat(decimal)}`;
  if (condition) {
    if (SafeMath.lt(number, 0)) {
      return `-${
        Math.ceil((Math.abs(number) + Number.EPSILON) * Math.pow(10, decimal)) /
        Math.pow(10, decimal)
      }`;
    } else if (SafeMath.gt(number, 0)) {
      return `${
        Math.floor((number + Number.EPSILON) * Math.pow(10, decimal)) /
        Math.pow(10, decimal)
      }`;
    }
  } else {
    return `${
      Math.ceil((number + Number.EPSILON) * Math.pow(10, decimal)) /
      Math.pow(10, decimal)
    }`;
  }
};

[arealclimber]

• condition=true (正數則捨去兩位小數之後的小數、負數則-0.01)

  • Long Close Price (Sell)
  • Short Open Price (Sell)
  • Long Close Value (Sell)
  • Long Open Value (Buy)
  • Short Open Value (Sell)
  • Short Close Value (Buy)
  • Liquidation Price for Long
  • PnL
  • Long/Short TP/SL bound
  • Expected Long/Short Profit
  • Expected Long/Short Loss

• condition=false （正數或負數都+0.01）

  • Long Open Price (Buy)
  • Short Close Price (Buy)
  • Liquidation Price for Short
  • Guaranteed stop fee
  • Required Margin

[arealclimber]

console.log('-3.411 floor', Math.floor((-3.411 + Number.EPSILON) * factor) / factor);
// -3.411 floor -3.42

console.log('-3.411 ceil', Math.ceil((-3.411 + Number.EPSILON) * factor) / factor);
// -3.411 ceil -3.41

console.log('3.411 floor', Math.floor((3.411 + Number.EPSILON) * factor) / factor);
// 3.411 floor 3.41

console.log('3.411 ceil', Math.ceil((3.411 + Number.EPSILON) * factor) / factor);
// 3.411 ceil 3.42

基於以上結果，小於零時將程式碼改成 return (Math.floor((Math.abs(number) + Number.EPSILON) * factor) / factor) * -1;

export const roundToDecimalPlaces = (
  number: number,
  decimal: number,
  condition = false
): number => {
  const factor = Math.pow(10, decimal);

  if (SafeMath.eq(number, 0)) {
    return Number(`0.${'0'.repeat(decimal)}`);
  }

  if (condition) {
    if (SafeMath.lt(number, 0)) {
      return (Math.floor((Math.abs(number) + Number.EPSILON) * factor) / factor) * -1;
    } else if (SafeMath.gt(number, 0)) {
      return Math.floor((number + Number.EPSILON) * factor) / factor;
    }
  }

  return Math.ceil((number + Number.EPSILON) * factor) / factor;
};

[TzuHanLiang]

ok

[arealclimber]

taking 3 hrs

[arealclimber]

改成 condition 打開就正數則捨去兩位小數之後的小數、負數則減掉0.01，而非直接無條件捨去

export const roundToDecimalPlaces = (
  number: number,
  decimal: number,
  condition = false
): number => {
  const factor = Math.pow(10, decimal);

  if (SafeMath.eq(number, 0)) {
    return Number(`0.${'0'.repeat(decimal)}`);
  }

  if (condition) {
    if (SafeMath.lt(number, 0)) {
      return (Math.ceil((Math.abs(number) + Number.EPSILON) * factor) / factor) * -1;
    } else if (SafeMath.gt(number, 0)) {
      return Math.floor((number + Number.EPSILON) * factor) / factor;
    }
  }

  return Math.ceil((number + Number.EPSILON) * factor) / factor;
};