Add configurable regex pattern for Sentry's ingoreErrors to match on. (…

…#293)

This will ignore 404, validation and permissions errors from being sent to Sentry.

config/config.js

@@ -13,7 +13,7 @@ module.exports = Object.freeze({
   web3Rpc: process.env.WEB3_RPC,
   nodePrivateKey: process.env.WEB3_NODEPRIVATEKEY,
   sentryDSN: process.env.SENTRY_DSN,
-
+  sentryIgnoreRegex: process.env.SENTRY_IGNORE_ERRORS_REGEX,
   // Required, one or more hosts delimited with comma, e.g
   // 'mongo1:27107,mongo2:27017'
   mongoHosts: process.env.MONGO_HOSTS,

dev.env

@@ -11,4 +11,5 @@ export BUNDLE_SIZE_LIMIT="16384"
 export WEB3_DEPLOYER_PRIVATEKEY="0x4d5db4107d237df6a3d58ee5f70ae63d73d7658d4026f2eefd2f204c81682cb7"
 export DEFAULT_STAKE="10000000000000000000000"
 export SENTRY_DSN=""
+export SENTRY_IGNORE_ERRORS_REGEX='^(NotFoundError|ValidationError|JsonValidationError|PermissionError)'
 export LOW_FUNDS_WARNING=1000

src/workers/server_worker.js

@@ -40,7 +40,11 @@ export default class ServerWorker extends Worker {
   async work() {
     this.logger.info('starting server');
 
-    Sentry.init({dsn: this.config.sentryDSN, environment: process.env.NODE_ENV});
+    Sentry.init({
+      dsn: this.config.sentryDSN,
+      environment: process.env.NODE_ENV,
+      ignoreErrors: this.config.sentryIgnoreRegex ? new RegExp(this.config.sentryIgnoreRegex) : []
+    });
 
     this.collectMetricsInterval = promClient.collectDefaultMetrics({timeout: 10000});
     const app = express();