text: 
  const request = require('request-promise-native');
  const bitcoreLib = require('bitcore-lib');
  const secp256k1 = require('secp256k1');
  const stream = require('stream');
  const requestStream = require('request');
  const { URL } = require('url');
  
  const Client = function (params) {
    Object.assign(this, params);
  };
  
  Client.prototype.sign = function (params) {
    const { method, url, payload = {} } = params;
    const parsedUrl = new URL(url);
    const message = [method, parsedUrl.pathname + parsedUrl.search, JSON.stringify(payload)].join('|');
    const privateKey = this.authKey.bn.toBuffer({ size: 32 });
    const messageHash = bitcoreLib.crypto.Hash.sha256sha256(Buffer.from(message));
  
    return secp256k1.sign(messageHash, privateKey).signature.toString('hex');
  };
  
  Client.prototype.register = async function (params) {
    const { payload } = params;
    // allow you to overload the client's baseUrl
    const { baseUrl = this.baseUrl } = payload;
    const url = `${baseUrl}/wallet`;
    const signature = this.sign({ method: 'POST', url, payload });
    return request.post(url, {
      headers: { 'x-signature': signature },
      body: payload,
      json: true
    });
  };
  
  Client.prototype.getBalance = async function (params) {
    const { payload, pubKey } = params;
    const url = `${this.baseUrl}/wallet/${pubKey}/balance`;
  console.log('[client.js.37:url:]',url); //TODO
    const signature = this.sign({ method: 'GET', url, payload });
    return request.get(url, {
      headers: { 'x-signature': signature },
      body: payload,
      json: true
    });
  };
  
  
  Client.prototype.getCheckData = async function (params) {
    const { payload, pubKey } = params;
    const url = `${this.baseUrl}/wallet/${pubKey}/check`;
  console.log('WALLET CHECK ',url); //TODO
    const signature = this.sign({ method: 'GET', url, payload });
    return request.get(url, {
      headers: { 'x-signature': signature },
      body: payload,
      json: true
    });
  };
  
  
  Client.prototype.getAddressTxos = async function (params) {
    const { unspent, address } = params;
    const args = unspent ? `?unspent=${unspent}` : '';
    const url = `${this.baseUrl}/address/${address}${args}`;
    return request.get(url, {
      json: true
    });
  };
  
  Client.prototype.getTx = async function (params) {
    const { txid } = params;
    const url = `${this.baseUrl}/tx/${txid}`;
  console.log('[client.js.59:url:]',url); //TODO
    return request.get(url, {
      json: true
    });
  };
  
  
  
  Client.prototype.getCoins = async function (params) {
    const { payload, pubKey, includeSpent } = params;
  
    var extra ='';
    if (includeSpent) {
      extra = `?includeSpent=${includeSpent}`;
    }
    const url = `${this.baseUrl}/wallet/${pubKey}/utxos${extra}`;
    console.log('GET UTXOS:',url); //TODO
    const signature = this.sign({ method: 'GET', url, payload });
    return request.get(url, {
      headers: { 'x-signature': signature },
      body: payload,
      json: true
    });
  };
  
  Client.prototype.listTransactions = function(params) {
    const { pubKey, startBlock, startDate, endBlock, endDate, includeMempool } = params;
    let url = `${this.baseUrl}/wallet/${pubKey}/transactions?`;
    if (startBlock) {
      url += `startBlock=${startBlock}&`;
    }
    if (endBlock) {
      url += `endBlock=${endBlock}&`;
    }
    if (includeMempool) {
      url += 'includeMempool=true';
    }
    const signature = this.sign({ method: 'GET', url });
    console.log('[client.js.96:url:]',url); //TODO
    return requestStream.get(url, {
      headers: { 'x-signature': signature },
      json: true
    });
  };
  
  Client.prototype.importAddresses = async function(params) {
    const { payload, pubKey } = params;
    const url = `${this.baseUrl}/wallet/${pubKey}`;
  
    console.log('addAddresses:',url, payload); //TODO
    const signature = this.sign({ method: 'POST', url, payload});
    let h = { 'x-signature': signature};
    return request.post(url, {
      headers: h,
      body: payload,
      json: true
    });
  };
  
  
  
  Client.prototype.broadcast = async function (params) {
    const { payload } = params;
    const url = `${this.baseUrl}/tx/send`;
  console.log('[client.js.113:url:]',url); //TODO
    return request.post(url, { body: payload, json: true });
  };
  
  module.exports = Client;
  