fix: linting errors after rebase with latest master

Author: zone117x

src/api/init.ts

@@ -53,7 +53,7 @@ export async function startApiServer(
   app.use(
     expressWinston.logger({
       winstonInstance: logger,
-      metaField: null!,
+      metaField: (null as unknown) as string,
     })
   );
 
@@ -98,7 +98,7 @@ export async function startApiServer(
   app.use(
     expressWinston.errorLogger({
       winstonInstance: logger,
-      metaField: null!,
+      metaField: (null as unknown) as string,
       blacklistedMetaFields: ['trace', 'os', 'process'],
     })
   );

src/datastore/postgres-store.ts

@@ -674,7 +674,7 @@ export class PgDataStore extends (EventEmitter as { new (): DataStoreEventEmitte
     const clientConfig = getPgClientConfig();
 
     const initTimer = stopwatch();
-    let connectionError: Error;
+    let connectionError: Error | undefined;
     let connectionOkay = false;
     do {
       const client = new Client(clientConfig);
@@ -698,7 +698,7 @@ export class PgDataStore extends (EventEmitter as { new (): DataStoreEventEmitte
       }
     } while (initTimer.getElapsed() < 10000);
     if (!connectionOkay) {
-      connectionError = connectionError! ?? new Error('Error connecting to database');
+      connectionError = connectionError ?? new Error('Error connecting to database');
       throw connectionError;
     }
 
@@ -1588,7 +1588,7 @@ export class PgDataStore extends (EventEmitter as { new (): DataStoreEventEmitte
           recipient: row.recipient,
           asset_identifier: row.asset_identifier,
           event_type: DbEventTypeId.NonFungibleTokenAsset,
-          value: row.value!,
+          value: row.value as Buffer,
         };
         return event;
       } else {

src/event-stream/event-server.ts

@@ -305,7 +305,7 @@ export async function startEventServer(
   });
 
   const server = await new Promise<Server>(resolve => {
-    const server = app.listen(eventPort, eventHost!, () => resolve(server));
+    const server = app.listen(eventPort, eventHost as string, () => resolve(server));
   });
 
   const addr = server.address();