Use different logger to make sure heartbeat is enabled

packages/pusher/src/heartbeat/heartbeat.test.ts

@@ -1,10 +1,11 @@
 import * as promiseUtilsModule from '@api3/promise-utils';
 
 import { config, parseHeartbeatLog } from '../../test/fixtures';
-import { logger } from '../logger';
 import * as stateModule from '../state';
 import { loadRawConfig } from '../validation/config';
 
+import { heartbeatLogger } from './logger';
+
 import { initiateHeartbeat, logHeartbeat, createHash } from '.';
 
 // eslint-disable-next-line jest/no-hooks
@@ -30,12 +31,12 @@ describe(logHeartbeat.name, () => {
   it('sends the correct heartbeat log', async () => {
     const state = stateModule.getInitialState(config);
     jest.spyOn(stateModule, 'getState').mockReturnValue(state);
-    jest.spyOn(logger, 'info');
+    jest.spyOn(heartbeatLogger, 'info').mockImplementation();
     jest.advanceTimersByTime(1000 * 3); // Advance time by 3 seconds to ensure the timestamp of the log is different from deployment timestamp.
 
     await logHeartbeat();
 
-    expect(logger.info).toHaveBeenCalledWith(expectedLogMessage);
+    expect(heartbeatLogger.info).toHaveBeenCalledWith(expectedLogMessage);
   });
 
   it('the heartbeat log can be parsed', () => {

packages/pusher/src/heartbeat/heartbeat.ts

@@ -5,6 +5,8 @@ import { logger } from '../logger';
 import { getState } from '../state';
 import { loadRawConfig } from '../validation/config';
 
+import { heartbeatLogger } from './logger';
+
 export const initiateHeartbeat = () => {
   logger.debug('Initiating heartbeat loop');
   setInterval(async () => {
@@ -47,8 +49,7 @@ export const logHeartbeat = async () => {
   const heartbeatSignature = await signHeartbeat(airnodeWallet, heartbeatPayload);
   const heartbeatLog = [...heartbeatPayload, heartbeatSignature].join(' - ');
 
-  // We ensure in config validation that INFO level logs are not disabled. The logs are sent to API3 for validation
-  // (that the data provider deployed deployed the correct configuration) and monitoring purposes (whether the instance
-  // is running).
-  logger.info(heartbeatLog);
+  // The logs are sent to API3 for validation (that the data provider deployed deployed the correct configuration) and
+  // monitoring purposes (whether the instance is running).
+  heartbeatLogger.info(heartbeatLog);
 };

packages/pusher/src/heartbeat/logger.ts

@@ -0,0 +1,15 @@
+import { createLogger } from '@api3/commons';
+
+import { loadEnv } from '../validation/env';
+
+// We need to load the environment variables before we can use the logger. Because we want the logger to always be
+// available, we load the environment variables as a side effect during the module import.
+const env = loadEnv();
+
+export const heartbeatLogger = createLogger({
+  colorize: env.LOG_COLORIZE,
+  format: env.LOG_FORMAT,
+  // We make sure the heartbeat logger is always enabled and logs all levels.
+  enabled: true,
+  minLevel: 'debug',
+});