import BigNumber from "bignumber.js";

// https://github.com/MikeMcl/bignumber.js
// https://blog.csdn.net/shenxianhui1995/article/details/103985434
export class TokenAmount {
  public wei: BigNumber;

  public decimals: number;
  public _decimals: BigNumber;

  constructor(
    wei: number | string | BigNumber,
    decimals: number = 0,
    isWei = true
  ) {
    this.decimals = decimals;
    this._decimals = new BigNumber(10).exponentiatedBy(decimals);

    if (isWei) {
      this.wei = new BigNumber(wei);
    } else {
      this.wei = new BigNumber(wei).multipliedBy(this._decimals);
    }
  }

  toWei() {
    return this.wei;
  }

  fixed() {
    return this.wei.dividedBy(this._decimals).toFixed(this.decimals);
  }
}