api.js

'use strict';

const assert = require('bsert');
const EventEmitter = require('events');
const WEB3 = require('web3-eth');
const {endpoint} = require('./constants');

/**
 * API
 * @alias module:API
 */

class API extends EventEmitter {
  /**
   * Create a API.
   * @constructor
   * @param {Object} options
   */

  constructor(options) {
    super();

    this.options = new APIOptions(options);
    this.eth = this.options.eth;

   }
}

class APIOptions {
  /**
   * APIOptions
   * @alias module:API.APIOptions
   * @constructor
   * @param {Object} options
   */

  constructor(options) {

    this.options = options;
    this.eth = new WEB3(new WEB3.providers.HttpProvider(endpoint));

    if (options)
      this.fromOptions(options);
 }

  /**
   * Inject properties from object.
   * @private
   * @param {Object} options
   * @returns {APIOptions}
   */

  fromOptions(options) {
    assert(options);

    this.eth = options.eth;

    if (options.eth != null) {
      assert(typeof options.eth === 'object');
      this.eth = options.eth;
    }

    return this;
  }

  /**
   * Instantiate http options from object.
   * @param {Object} options
   * @returns {APIOptions}
   */

  static fromOptions(options) {
    return new this().fromOptions(options);
  }
}

/**
 * Helpers
 */

function enforce(value, msg) {
  if (!value) {
    const err = new Error(msg);
    err.statusCode = 400;
    throw err;
  }
}

/*
 * Expose
 */

module.exports = API;