1  import { BigNumber, BigNumberish } from 'ethers';
 2  import { formatUnits } from 'ethers/lib/utils';
 3  
 4  export class FixedPointDecimal {
 5    private readonly _value: BigNumber;
 6  
 7    constructor(_value: BigNumberish, private readonly _decimals: number) {
 8      this._value = BigNumber.from(_value);
 9    }
10  
11    get value() {
12      return this._value;
13    }
14  
15    get decimals() {
16      return this._decimals;
17    }
18  
19    add(value: FixedPointDecimal) {
20      return new FixedPointDecimal(this._value.add(value._value), this._decimals);
21    }
22  
23    eq(value: FixedPointDecimal) {
24      return this._value.eq(value._value);
25    }
26  
27    format() {
28      return formatUnits(this._value, this._decimals);
29    }
30  }