wehelpjs/lib/api/transports/http.js

wehelpjs is the JavaScript API Library for the WeYouMe blockchain

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.jsonRpc = jsonRpc;
exports.default = void 0;

var _crossFetch = _interopRequireDefault(require("cross-fetch"));

var _debug = _interopRequireDefault(require("debug"));

var _base = _interopRequireDefault(require("./base"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

const debug = (0, _debug.default)('wehelpjs:http');

class RPCError extends Error {
  constructor(rpcError) {
    super(rpcError.message);
    this.name = 'RPCError';
    this.code = rpcError.code;
    this.data = rpcError.data;
  }

}

function jsonRpc(uri, {
  method,
  id,
  params
}) {
  const payload = {
    id,
    jsonrpc: '2.0',
    method,
    params
  };
  return (0, _crossFetch.default)(uri, {
    body: JSON.stringify(payload),
    method: 'post',
    mode: 'cors',
    headers: {
      Accept: 'application/json, text/plain, */*',
      'Content-Type': 'application/json'
    }
  }).then(res => {
    if (!res.ok) {
      throw new Error(`HTTP ${res.status}: ${res.statusText}`);
    }

    return res.json();
  }).then(rpcRes => {
    if (rpcRes.id !== id) {
      throw new Error(`Invalid response id: ${rpcRes.id}`);
    }

    if (rpcRes.error) {
      throw new RPCError(rpcRes.error);
    }

    return rpcRes.result;
  });
}

class HttpTransport extends _base.default {
  send(api, data, callback) {
    if (this.options.useAppbaseApi) {
      api = 'condenser_api';
    }

    debug('wehelpjs::send', api, data);
    const id = data.id || this.id++;
    const params = [api, data.method, data.params];
    jsonRpc(this.options.uri, {
      method: 'call',
      id,
      params
    }).then(res => {
      if (typeof callback == 'function') {
        callback(null, res);
      }
    }, err => {
      if (typeof callback == 'function') {
        callback(err);
      }
    });
  }

}

exports.default = HttpTransport;