import Web3 from 'web3';
import { BN } from 'ethereumjs-util';

export const SAMPLE_GAS = 1000000;

export class ChainCommon {
  private web3: Web3;

  constructor(web3: Web3) {
    this.web3 = web3;
  }

  public async checkEthEnough(gas: string, address?: string) {
    address = address || jc.wallet.currentAccAddr;
    let gasPrice = await this.web3.eth.getGasPrice();
    console.log('gasPrice: ' + new BN(gasPrice));
    let balance = await this.web3.eth.getBalance(address);
    console.log('eth balance: ' + new BN(balance));
    return new BN(balance).gte(new BN(gasPrice).mul(new BN(gas)));
  }

  public async getBalance(address?: string) {
    address = address || jc.wallet.currentAccAddr;

    let balance = await this.web3.eth.getBalance(address);
    return balance;
  }
}