removed require for reading bws.config and added BWS_CONFIG environment variable

Author: MicahMaphet

packages/bitcore-wallet-service/src/config.ts

@@ -1,8 +1,8 @@
+import fs from 'fs';
 import _ from 'lodash';
-import { logger } from './lib/logger';
 
 const Config = (): any => {
-  let defaultConfig = {
+  const defaultConfig = {
     basePath: '/bws/api',
     disableLogs: false,
     port: 3232,
@@ -474,23 +474,41 @@ const Config = (): any => {
     //   whitelist: []
     // },
   };
+  
+  const configPath = process.env.BWS_CONFIG || 'bws.config.js';
 
-  // Override default values with bws.config.js' values, if present
+  if (!fs.existsSync(configPath)) {
+    throw new Error(`No bitcore config exists at ${configPath}`);
+  }
+
+  const bitcoreConfigStat = fs.statSync(configPath);
+  if (bitcoreConfigStat.isDirectory()) {
+    throw new Error(`Provided bitcore config path: ${configPath} is a directory`);
+  }
+
+  let rawConfig;
   try {
-    // eslint-disable-next-line @typescript-eslint/no-require-imports
-    const bwsConfig = require('../../bws.config');
-    defaultConfig = _.merge(defaultConfig, bwsConfig);
-  } catch {
-    logger.info('bws.config.js not found, using default configuration values');
+    rawConfig = fs.readFileSync(configPath).toString();
+  } catch (error) {
+    throw new Error(`Error in loading bitcore config\nFound file at ${configPath}\n${error}`);
   }
 
+  let config;
+  try {
+    config = JSON.parse(rawConfig);
+  } catch (error) {
+    throw new Error(`Error in parsing bitcore config\nFound and loaded file at ${configPath}\n${error}`);
+  }
+
+  config = _.merge(defaultConfig, config);
+
   if (process.env.SENDGRID_API_KEY) {
     // override the config value in bws.config.js with env var
-    defaultConfig.emailOpts.sendGridApiKey = process.env.SENDGRID_API_KEY;
+    config.emailOpts.sendGridApiKey = process.env.SENDGRID_API_KEY;
   }
   if (process.env.MAILERSEND_API_KEY) {
     // override the config value in bws.config.js with env var
-    defaultConfig.emailOpts.mailerSendApiKey = process.env.MAILERSEND_API_KEY;
+    config.emailOpts.mailerSendApiKey = process.env.MAILERSEND_API_KEY;
   }
 
   return defaultConfig;