const util = require('util');
const Web3 = require('web3');
const utils = require('j7/utils');
const event = require('j7/event');
const sync = require("j7/sync");
const log = require("j7/log");
const metaFactory = require('./metadata/factory');
const C = require("./C");

class BlockChain {

  constructor() {
    this.netId = 0;
  }

  async initInstance(user, address, jsonUrl) {
    const json = utils.readJsonFromFile(jsonUrl);
    return new this.web3.eth.Contract(
      json.abi,
      address,
      { from: user }
    );
  }

  async init() {
    this.web3 = new Web3(metaFactory.getWeb3Conf()['block_server']);
    this.web3.eth.handleRevert = true;
    for (const data of metaFactory.getContracts()) {
      this[`${data.name}Instance`] = await this.initInstance
      (metaFactory.getUserAddress(), data.address, data.json);
    }
    event.emitEvent(C.BC_INITIALIZED_EVENT);
  }

  async getNetId() {
    return await this.web3.eth.getChainId();
  }

}

module.exports = new BlockChain();