diff --git a/examples/dapr-example/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts b/examples/dapr-example/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts
index e37a46cae..482dda298 100644
--- a/examples/dapr-example/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts
+++ b/examples/dapr-example/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts
@@ -14,8 +14,8 @@ export const getAllUsersCommandBuilder = userV1ServiceBuilder
   .addOutputSchema(userV1GetAllUsersOutputPayloadSchema)
   .exposeAsHttpEndpoint('GET', '/user')
   .setCommandFunction(async function (context, _payload, _parameter) {
-    const result: { users?: User[] } = await context.states.getState(StateStoreKey.Users)
-    const users = result.users || []
+    const result = (await context.states.getState(StateStoreKey.Users)) as { [StateStoreKey.Users]: User[] | undefined }
+    const users = result.users ?? []
 
     return users
   })
diff --git a/examples/dapr-example/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts b/examples/dapr-example/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts
index a1254ef4e..8d8e25d5f 100644
--- a/examples/dapr-example/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts
+++ b/examples/dapr-example/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts
@@ -16,8 +16,8 @@ export const getUserByIdCommandBuilder = userV1ServiceBuilder
   .addOutputSchema(userV1GetUserByIdOutputPayloadSchema)
   .exposeAsHttpEndpoint('GET', 'user/:userId')
   .setCommandFunction(async function (context, _payload, parameter) {
-    const result: { users?: User[] } = await context.states.getState(StateStoreKey.Users)
-    const users = result.users || []
+    const result = (await context.states.getState(StateStoreKey.Users)) as { [StateStoreKey.Users]: User[] | undefined }
+    const users = result.users ?? []
 
     const user = users.find((user) => (user.userId = parameter.userId))
 
diff --git a/examples/dapr-example/src/service/user/v1/command/signUp/signUpCommandBuilder.ts b/examples/dapr-example/src/service/user/v1/command/signUp/signUpCommandBuilder.ts
index a736b7d20..b44bbb80c 100644
--- a/examples/dapr-example/src/service/user/v1/command/signUp/signUpCommandBuilder.ts
+++ b/examples/dapr-example/src/service/user/v1/command/signUp/signUpCommandBuilder.ts
@@ -20,7 +20,7 @@ export const signUpCommandBuilder = userV1ServiceBuilder
   .addOutputSchema(userV1SignUpOutputPayloadSchema)
   .exposeAsHttpEndpoint('POST', 'user/signup')
   .setCommandFunction(async function (context, payload, _parameter) {
-    const result: { users?: User[] } = await context.states.getState(StateStoreKey.Users)
+    const result = (await context.states.getState(StateStoreKey.Users)) as { [StateStoreKey.Users]: User[] | undefined }
 
     if (result.users?.some((user) => user.email === payload.email)) {
       throw new HandledError(StatusCode.BadRequest, 'the user already exists')
@@ -31,7 +31,7 @@ export const signUpCommandBuilder = userV1ServiceBuilder
       userId: randomUUID(),
     }
 
-    const users = result.users || []
+    const users = result.users ?? []
     users.push(user)
 
     await context.states.setState(StateStoreKey.Users, users)
diff --git a/examples/fullexample/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts b/examples/fullexample/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts
index e37a46cae..482dda298 100644
--- a/examples/fullexample/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts
+++ b/examples/fullexample/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts
@@ -14,8 +14,8 @@ export const getAllUsersCommandBuilder = userV1ServiceBuilder
   .addOutputSchema(userV1GetAllUsersOutputPayloadSchema)
   .exposeAsHttpEndpoint('GET', '/user')
   .setCommandFunction(async function (context, _payload, _parameter) {
-    const result: { users?: User[] } = await context.states.getState(StateStoreKey.Users)
-    const users = result.users || []
+    const result = (await context.states.getState(StateStoreKey.Users)) as { [StateStoreKey.Users]: User[] | undefined }
+    const users = result.users ?? []
 
     return users
   })
diff --git a/examples/fullexample/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts b/examples/fullexample/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts
index a1254ef4e..8d8e25d5f 100644
--- a/examples/fullexample/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts
+++ b/examples/fullexample/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts
@@ -16,8 +16,8 @@ export const getUserByIdCommandBuilder = userV1ServiceBuilder
   .addOutputSchema(userV1GetUserByIdOutputPayloadSchema)
   .exposeAsHttpEndpoint('GET', 'user/:userId')
   .setCommandFunction(async function (context, _payload, parameter) {
-    const result: { users?: User[] } = await context.states.getState(StateStoreKey.Users)
-    const users = result.users || []
+    const result = (await context.states.getState(StateStoreKey.Users)) as { [StateStoreKey.Users]: User[] | undefined }
+    const users = result.users ?? []
 
     const user = users.find((user) => (user.userId = parameter.userId))
 
diff --git a/examples/fullexample/src/service/user/v1/command/signUp/signUpCommandBuilder.ts b/examples/fullexample/src/service/user/v1/command/signUp/signUpCommandBuilder.ts
index a736b7d20..b44bbb80c 100644
--- a/examples/fullexample/src/service/user/v1/command/signUp/signUpCommandBuilder.ts
+++ b/examples/fullexample/src/service/user/v1/command/signUp/signUpCommandBuilder.ts
@@ -20,7 +20,7 @@ export const signUpCommandBuilder = userV1ServiceBuilder
   .addOutputSchema(userV1SignUpOutputPayloadSchema)
   .exposeAsHttpEndpoint('POST', 'user/signup')
   .setCommandFunction(async function (context, payload, _parameter) {
-    const result: { users?: User[] } = await context.states.getState(StateStoreKey.Users)
+    const result = (await context.states.getState(StateStoreKey.Users)) as { [StateStoreKey.Users]: User[] | undefined }
 
     if (result.users?.some((user) => user.email === payload.email)) {
       throw new HandledError(StatusCode.BadRequest, 'the user already exists')
@@ -31,7 +31,7 @@ export const signUpCommandBuilder = userV1ServiceBuilder
       userId: randomUUID(),
     }
 
-    const users = result.users || []
+    const users = result.users ?? []
     users.push(user)
 
     await context.states.setState(StateStoreKey.Users, users)
diff --git a/examples/kubernetes/src/index.ts b/examples/kubernetes/src/index.ts
index 2a6a15a27..dca6d346a 100644
--- a/examples/kubernetes/src/index.ts
+++ b/examples/kubernetes/src/index.ts
@@ -44,7 +44,7 @@ const main = async () => {
   // set up the eventbridge and start the event bridge
   const eventBridge = new AmqpBridge({
     spanProcessor,
-    instanceId: process.env.HOSTNAME || getNewInstanceId(),
+    instanceId: process.env.HOSTNAME ?? getNewInstanceId(),
     url: process.env.AMQP_URL,
   })
   await eventBridge.start()
diff --git a/examples/mqtt-bridge/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts b/examples/mqtt-bridge/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts
index e37a46cae..482dda298 100644
--- a/examples/mqtt-bridge/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts
+++ b/examples/mqtt-bridge/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts
@@ -14,8 +14,8 @@ export const getAllUsersCommandBuilder = userV1ServiceBuilder
   .addOutputSchema(userV1GetAllUsersOutputPayloadSchema)
   .exposeAsHttpEndpoint('GET', '/user')
   .setCommandFunction(async function (context, _payload, _parameter) {
-    const result: { users?: User[] } = await context.states.getState(StateStoreKey.Users)
-    const users = result.users || []
+    const result = (await context.states.getState(StateStoreKey.Users)) as { [StateStoreKey.Users]: User[] | undefined }
+    const users = result.users ?? []
 
     return users
   })
diff --git a/examples/mqtt-bridge/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts b/examples/mqtt-bridge/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts
index a1254ef4e..8d8e25d5f 100644
--- a/examples/mqtt-bridge/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts
+++ b/examples/mqtt-bridge/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts
@@ -16,8 +16,8 @@ export const getUserByIdCommandBuilder = userV1ServiceBuilder
   .addOutputSchema(userV1GetUserByIdOutputPayloadSchema)
   .exposeAsHttpEndpoint('GET', 'user/:userId')
   .setCommandFunction(async function (context, _payload, parameter) {
-    const result: { users?: User[] } = await context.states.getState(StateStoreKey.Users)
-    const users = result.users || []
+    const result = (await context.states.getState(StateStoreKey.Users)) as { [StateStoreKey.Users]: User[] | undefined }
+    const users = result.users ?? []
 
     const user = users.find((user) => (user.userId = parameter.userId))
 
diff --git a/examples/mqtt-bridge/src/service/user/v1/command/signUp/signUpCommandBuilder.ts b/examples/mqtt-bridge/src/service/user/v1/command/signUp/signUpCommandBuilder.ts
index a736b7d20..b44bbb80c 100644
--- a/examples/mqtt-bridge/src/service/user/v1/command/signUp/signUpCommandBuilder.ts
+++ b/examples/mqtt-bridge/src/service/user/v1/command/signUp/signUpCommandBuilder.ts
@@ -20,7 +20,7 @@ export const signUpCommandBuilder = userV1ServiceBuilder
   .addOutputSchema(userV1SignUpOutputPayloadSchema)
   .exposeAsHttpEndpoint('POST', 'user/signup')
   .setCommandFunction(async function (context, payload, _parameter) {
-    const result: { users?: User[] } = await context.states.getState(StateStoreKey.Users)
+    const result = (await context.states.getState(StateStoreKey.Users)) as { [StateStoreKey.Users]: User[] | undefined }
 
     if (result.users?.some((user) => user.email === payload.email)) {
       throw new HandledError(StatusCode.BadRequest, 'the user already exists')
@@ -31,7 +31,7 @@ export const signUpCommandBuilder = userV1ServiceBuilder
       userId: randomUUID(),
     }
 
-    const users = result.users || []
+    const users = result.users ?? []
     users.push(user)
 
     await context.states.setState(StateStoreKey.Users, users)
diff --git a/examples/nats-bridge/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts b/examples/nats-bridge/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts
index e37a46cae..482dda298 100644
--- a/examples/nats-bridge/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts
+++ b/examples/nats-bridge/src/service/user/v1/command/getAllUsers/getAllUsersCommandBuilder.ts
@@ -14,8 +14,8 @@ export const getAllUsersCommandBuilder = userV1ServiceBuilder
   .addOutputSchema(userV1GetAllUsersOutputPayloadSchema)
   .exposeAsHttpEndpoint('GET', '/user')
   .setCommandFunction(async function (context, _payload, _parameter) {
-    const result: { users?: User[] } = await context.states.getState(StateStoreKey.Users)
-    const users = result.users || []
+    const result = (await context.states.getState(StateStoreKey.Users)) as { [StateStoreKey.Users]: User[] | undefined }
+    const users = result.users ?? []
 
     return users
   })
diff --git a/examples/nats-bridge/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts b/examples/nats-bridge/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts
index a1254ef4e..8d8e25d5f 100644
--- a/examples/nats-bridge/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts
+++ b/examples/nats-bridge/src/service/user/v1/command/getUserById/getUserByIdCommandBuilder.ts
@@ -16,8 +16,8 @@ export const getUserByIdCommandBuilder = userV1ServiceBuilder
   .addOutputSchema(userV1GetUserByIdOutputPayloadSchema)
   .exposeAsHttpEndpoint('GET', 'user/:userId')
   .setCommandFunction(async function (context, _payload, parameter) {
-    const result: { users?: User[] } = await context.states.getState(StateStoreKey.Users)
-    const users = result.users || []
+    const result = (await context.states.getState(StateStoreKey.Users)) as { [StateStoreKey.Users]: User[] | undefined }
+    const users = result.users ?? []
 
     const user = users.find((user) => (user.userId = parameter.userId))
 
diff --git a/examples/nats-bridge/src/service/user/v1/command/signUp/signUpCommandBuilder.ts b/examples/nats-bridge/src/service/user/v1/command/signUp/signUpCommandBuilder.ts
index a736b7d20..b44bbb80c 100644
--- a/examples/nats-bridge/src/service/user/v1/command/signUp/signUpCommandBuilder.ts
+++ b/examples/nats-bridge/src/service/user/v1/command/signUp/signUpCommandBuilder.ts
@@ -20,7 +20,7 @@ export const signUpCommandBuilder = userV1ServiceBuilder
   .addOutputSchema(userV1SignUpOutputPayloadSchema)
   .exposeAsHttpEndpoint('POST', 'user/signup')
   .setCommandFunction(async function (context, payload, _parameter) {
-    const result: { users?: User[] } = await context.states.getState(StateStoreKey.Users)
+    const result = (await context.states.getState(StateStoreKey.Users)) as { [StateStoreKey.Users]: User[] | undefined }
 
     if (result.users?.some((user) => user.email === payload.email)) {
       throw new HandledError(StatusCode.BadRequest, 'the user already exists')
@@ -31,7 +31,7 @@ export const signUpCommandBuilder = userV1ServiceBuilder
       userId: randomUUID(),
     }
 
-    const users = result.users || []
+    const users = result.users ?? []
     users.push(user)
 
     await context.states.setState(StateStoreKey.Users, users)
diff --git a/examples/nats-bridge/src/types/StateStoreKey.enum.ts b/examples/nats-bridge/src/types/StateStoreKey.enum.ts
index a25d9271c..2d5e51b84 100644
--- a/examples/nats-bridge/src/types/StateStoreKey.enum.ts
+++ b/examples/nats-bridge/src/types/StateStoreKey.enum.ts
@@ -1,3 +1,3 @@
-export enum StateStoreKey {
-  Users = 'users',
-}
+export const StateStoreKey = {
+  Users: 'users',
+} as const
diff --git a/package.json b/package.json
index 764c898e4..1865168b9 100644
--- a/package.json
+++ b/package.json
@@ -5,8 +5,8 @@
   "scripts": {
     "start": "npm run dev -w examples/fullexample",
     "build": "npm run build --workspaces --if-present",
-    "lint": "eslint . --cache . --fix",
-    "lint:fix": "eslint . --cache .",
+    "lint": "eslint . --cache .",
+    "lint:fix": "eslint . --cache . --fix",
     "test": "vitest -c vite.config.all.ts",
     "test:unit": "vitest -c vite.config.ts",
     "test:integration": "vitest -c vite.config.integration.ts",
diff --git a/packages/amqpbridge/src/AmqpBridge.impl.ts b/packages/amqpbridge/src/AmqpBridge.impl.ts
index c7e5d5e50..7159a4c54 100644
--- a/packages/amqpbridge/src/AmqpBridge.impl.ts
+++ b/packages/amqpbridge/src/AmqpBridge.impl.ts
@@ -135,7 +135,7 @@ export class AmqpBridge extends EventBridgeBaseClass<AmqpBridgeConfig> implement
   async start() {
     await super.start()
     try {
-      this.connection = await amqplib.connect(this.config.url || getDefaultConfig().url, this.config.socketOptions)
+      this.connection = await amqplib.connect(this.config.url ?? getDefaultConfig().url, this.config.socketOptions)
     } catch (err) {
       this.emit(EventBridgeEventNames.EventbridgeConnectionError, err)
       this.logger.fatal({ err }, 'unable to connect to broker')
@@ -173,13 +173,13 @@ export class AmqpBridge extends EventBridgeBaseClass<AmqpBridgeConfig> implement
 
     this.logger.debug('ensured: default exchange')
     await this.channel.assertExchange(
-      this.config.exchangeName || getDefaultConfig().exchangeName,
+      this.config.exchangeName ?? getDefaultConfig().exchangeName,
       'headers',
       this.config.exchangeOptions,
     )
     const responseQueue = await this.channel.assertQueue('', { exclusive: true, autoDelete: true, durable: false })
     this.replyQueueName = responseQueue.queue
-    await this.channel.bindQueue(this.replyQueueName, this.config.exchangeName || getDefaultConfig().exchangeName, '', {
+    await this.channel.bindQueue(this.replyQueueName, this.config.exchangeName ?? getDefaultConfig().exchangeName, '', {
       'x-match': 'all',
       replyTo: this.replyQueueName,
     })
@@ -337,7 +337,7 @@ export class AmqpBridge extends EventBridgeBaseClass<AmqpBridgeConfig> implement
 
       const payload = await this.encodeContent(msg, contentType, contentEncoding)
 
-      await this.channel.publish(this.config.exchangeName || getDefaultConfig().exchangeName, '', payload, {
+      await this.channel.publish(this.config.exchangeName ?? getDefaultConfig().exchangeName, '', payload, {
         messageId: msg.id,
         timestamp: msg.timestamp,
         contentType,
@@ -446,7 +446,7 @@ export class AmqpBridge extends EventBridgeBaseClass<AmqpBridgeConfig> implement
 
         const content = await this.encodeContent(command, 'application/json', 'utf-8')
 
-        this.channel.publish(this.config.exchangeName || getDefaultConfig().exchangeName, '', content, {
+        this.channel.publish(this.config.exchangeName ?? getDefaultConfig().exchangeName, '', content, {
           messageId: command.id,
           timestamp: command.timestamp,
           correlationId: command.correlationId,
@@ -483,7 +483,7 @@ export class AmqpBridge extends EventBridgeBaseClass<AmqpBridgeConfig> implement
 
     const channel = await this.connection.createChannel()
 
-    const noAck = eventBridgeConfig.autoacknowledge === undefined ? true : eventBridgeConfig.autoacknowledge
+    const noAck = eventBridgeConfig.autoacknowledge ?? true
 
     channel.on('close', () => {
       this.healthy = false
@@ -498,7 +498,7 @@ export class AmqpBridge extends EventBridgeBaseClass<AmqpBridgeConfig> implement
     })
 
     const queue = await channel.assertQueue(queueName, { durable: !!eventBridgeConfig.durable, autoDelete: true })
-    await channel.bindQueue(queue.queue, this.config.exchangeName || getDefaultConfig().exchangeName, '', {
+    await channel.bindQueue(queue.queue, this.config.exchangeName ?? getDefaultConfig().exchangeName, '', {
       'x-match': 'all',
       messageType: EBMessageType.Command,
       receiverServiceName: address.serviceName,
@@ -575,7 +575,7 @@ export class AmqpBridge extends EventBridgeBaseClass<AmqpBridgeConfig> implement
 
                   const payload = await this.encodeContent(responseMessage, contentType, contentEncoding)
 
-                  this.channel?.publish(this.config.exchangeName || getDefaultConfig().exchangeName, '', payload, {
+                  this.channel?.publish(this.config.exchangeName ?? getDefaultConfig().exchangeName, '', payload, {
                     messageId: responseMessage.id,
                     timestamp: responseMessage.timestamp,
                     correlationId: msg.properties.correlationId,
@@ -686,7 +686,7 @@ export class AmqpBridge extends EventBridgeBaseClass<AmqpBridgeConfig> implement
     })
 
     const queue = await channel.assertQueue(queueName, queueOptions)
-    await channel.bindQueue(queue.queue, this.config.exchangeName || getDefaultConfig().exchangeName, '', {
+    await channel.bindQueue(queue.queue, this.config.exchangeName ?? getDefaultConfig().exchangeName, '', {
       'x-match': 'all',
       messageType: subscription.messageType,
       senderServiceName: subscription.sender?.serviceName,
diff --git a/packages/base-http-bridge/src/HttpEventBridge/HttpEventBridge.impl.ts b/packages/base-http-bridge/src/HttpEventBridge/HttpEventBridge.impl.ts
index 412f1ce5d..03dd0bd04 100644
--- a/packages/base-http-bridge/src/HttpEventBridge/HttpEventBridge.impl.ts
+++ b/packages/base-http-bridge/src/HttpEventBridge/HttpEventBridge.impl.ts
@@ -80,7 +80,7 @@ export class HttpEventBridge<CustomConfig extends HttpEventBridgeConfig>
       ...config,
     }
 
-    super(conf.name || 'HttpEventBridge', conf)
+    super(conf.name ?? 'HttpEventBridge', conf)
 
     this.client = client
 
diff --git a/packages/base-http-bridge/src/HttpEventBridge/getCommandHandler.impl.ts b/packages/base-http-bridge/src/HttpEventBridge/getCommandHandler.impl.ts
index 394299762..13b126c53 100644
--- a/packages/base-http-bridge/src/HttpEventBridge/getCommandHandler.impl.ts
+++ b/packages/base-http-bridge/src/HttpEventBridge/getCommandHandler.impl.ts
@@ -46,7 +46,7 @@ export const getCommandHandler = function (
       { kind: SpanKind.CONSUMER },
       parentContext,
       async (span) => {
-        const hostname = process.env.HOSTNAME || 'unknown'
+        const hostname = process.env.HOSTNAME ?? 'unknown'
         span.setAttribute(SemanticAttributes.HTTP_URL, c.req.url || '')
         span.setAttribute(SemanticAttributes.HTTP_METHOD, c.req.method || '')
         span.setAttribute(SemanticAttributes.HTTP_HOST, hostname)
diff --git a/packages/base-http-bridge/src/HttpEventBridge/getCommandHandlerRestApi.impl.ts b/packages/base-http-bridge/src/HttpEventBridge/getCommandHandlerRestApi.impl.ts
index 29de6a8ff..24b945570 100644
--- a/packages/base-http-bridge/src/HttpEventBridge/getCommandHandlerRestApi.impl.ts
+++ b/packages/base-http-bridge/src/HttpEventBridge/getCommandHandlerRestApi.impl.ts
@@ -46,7 +46,7 @@ export const getCommandHandlerRestApi = function (
       { kind: SpanKind.CONSUMER },
       parentContext,
       async (span) => {
-        const hostname = process.env.HOSTNAME || 'unknown'
+        const hostname = process.env.HOSTNAME ?? 'unknown'
         span.setAttribute(SemanticAttributes.HTTP_URL, c.req.url || '')
         span.setAttribute(SemanticAttributes.HTTP_METHOD, c.req.method || '')
         span.setAttribute(SemanticAttributes.HTTP_HOST, hostname)
@@ -67,7 +67,7 @@ export const getCommandHandlerRestApi = function (
 
           let body: unknown
           if (c.req.method === 'POST' || c.req.method === 'PUT' || c.req.method === 'PATCH') {
-            const contentType = metadata.expose.contentTypeRequest || 'application/json'
+            const contentType = metadata.expose.contentTypeRequest ?? 'application/json'
 
             body = contentType.toLowerCase() === 'application/json' ? await c.req.json() : await c.req.text()
           }
@@ -79,8 +79,8 @@ export const getCommandHandlerRestApi = function (
             messageType: EBMessageType.Command,
             correlationId: '',
             timestamp: Date.now(),
-            contentType: metadata.expose.contentTypeResponse || 'application/json',
-            contentEncoding: metadata.expose.contentEncodingResponse || 'utf-8',
+            contentType: metadata.expose.contentTypeResponse ?? 'application/json',
+            contentEncoding: metadata.expose.contentEncodingResponse ?? 'utf-8',
             otp: serializeOtp(),
             receiver: {
               ...address,
@@ -131,7 +131,7 @@ export const getCommandHandlerRestApi = function (
               statusText: getErrorMessageForCode(status),
               headers: {
                 'content-type': `${metadata.expose.contentTypeResponse} || 'application/json'; charset=${
-                  metadata.expose.contentEncodingResponse || 'utf-8'
+                  metadata.expose.contentEncodingResponse ?? 'utf-8'
                 }`,
               },
             })
@@ -154,7 +154,7 @@ export const getCommandHandlerRestApi = function (
             statusText: getErrorMessageForCode(status),
             headers: {
               'content-type': `${metadata.expose.contentTypeResponse} || 'application/json'; charset=${
-                metadata.expose.contentEncodingResponse || 'utf-8'
+                metadata.expose.contentEncodingResponse ?? 'utf-8'
               }`,
             },
           })
diff --git a/packages/base-http-bridge/src/HttpEventBridge/getSubscriptionHandler.impl.ts b/packages/base-http-bridge/src/HttpEventBridge/getSubscriptionHandler.impl.ts
index 12ca0298f..3d7c7a883 100644
--- a/packages/base-http-bridge/src/HttpEventBridge/getSubscriptionHandler.impl.ts
+++ b/packages/base-http-bridge/src/HttpEventBridge/getSubscriptionHandler.impl.ts
@@ -32,7 +32,7 @@ export const getSubscriptionHandler = function (
       { kind: SpanKind.CONSUMER },
       parentContext,
       async (span) => {
-        const hostname = process.env.HOSTNAME || 'unknown'
+        const hostname = process.env.HOSTNAME ?? 'unknown'
         span.setAttribute(SemanticAttributes.HTTP_URL, c.req.url || '')
         span.setAttribute(SemanticAttributes.HTTP_METHOD, c.req.method || '')
         span.setAttribute(SemanticAttributes.HTTP_HOST, hostname)
diff --git a/packages/cli/src/helper/installInfo.ts b/packages/cli/src/helper/installInfo.ts
index dffbf0ec0..7b40f9c32 100644
--- a/packages/cli/src/helper/installInfo.ts
+++ b/packages/cli/src/helper/installInfo.ts
@@ -67,8 +67,8 @@ const getServiceVersions = (startFolder: string, serviceName: string) => {
         service.version = parseInt(versionInfo[1])
         service.path = path.join(serviceName, path.basename(file))
 
-        service.builderFile = getBuilderFile(name) || ''
-        service.serviceFile = getServiceFile(name) || ''
+        service.builderFile = getBuilderFile(name) ?? ''
+        service.serviceFile = getServiceFile(name) ?? ''
       }
     } else {
       const infoName = path.basename(file)
diff --git a/packages/core/src/DefaultLogger/DefaultLogger.impl.ts b/packages/core/src/DefaultLogger/DefaultLogger.impl.ts
index 24909c370..9bb5afd61 100644
--- a/packages/core/src/DefaultLogger/DefaultLogger.impl.ts
+++ b/packages/core/src/DefaultLogger/DefaultLogger.impl.ts
@@ -62,7 +62,7 @@ export class DefaultLogger extends Logger implements ILogger {
     const parameter: LoggerOptions = {
       ...options,
       name: undefined,
-      module: options.module || options.name || prefix.join('-'),
+      module: options.module ?? options.name ?? prefix.join('-'),
     }
 
     const child = this.log.child(parameter)
diff --git a/packages/core/src/HttpClient/HttpClient.impl.ts b/packages/core/src/HttpClient/HttpClient.impl.ts
index db1add6d7..a4829c657 100644
--- a/packages/core/src/HttpClient/HttpClient.impl.ts
+++ b/packages/core/src/HttpClient/HttpClient.impl.ts
@@ -42,7 +42,7 @@ export class HttpClient<CustomConfig extends Record<string, unknown> = {}> imple
     const name = config.name ?? this.name
     this.name = name
 
-    const logger = config.logger?.getChildLogger({ name }) || initLogger(config.logLevel, { name })
+    const logger = config.logger?.getChildLogger({ name }) ?? initLogger(config.logLevel, { name })
 
     this.config = {
       logger,
@@ -137,7 +137,7 @@ export class HttpClient<CustomConfig extends Record<string, unknown> = {}> imple
 
     const url = new URL(fullPath, this.baseUrl)
 
-    for (const [key, value] of Object.entries(options?.query || {})) {
+    for (const [key, value] of Object.entries(options?.query ?? {})) {
       url.searchParams.set(key, value)
     }
 
diff --git a/packages/core/src/SubscriptionDefinitionBuilder/SubscriptionDefinitionBuilder.impl.ts b/packages/core/src/SubscriptionDefinitionBuilder/SubscriptionDefinitionBuilder.impl.ts
index 0ec8cd954..8595addf6 100644
--- a/packages/core/src/SubscriptionDefinitionBuilder/SubscriptionDefinitionBuilder.impl.ts
+++ b/packages/core/src/SubscriptionDefinitionBuilder/SubscriptionDefinitionBuilder.impl.ts
@@ -787,11 +787,11 @@ export class SubscriptionDefinitionBuilder<
       throw new Error(`SubscriptionDefinitionBuilder: missing function implementation for ${this.subscriptionName}`)
     }
 
-    const inputPayloadSchema: Schema | undefined = this.hooks.transformInput?.transformInputSchema || this.inputSchema
+    const inputPayloadSchema: Schema | undefined = this.hooks.transformInput?.transformInputSchema ?? this.inputSchema
     const inputParameterSchema: Schema | undefined =
-      this.hooks.transformInput?.transformParameterSchema || this.parameterSchema
+      this.hooks.transformInput?.transformParameterSchema ?? this.parameterSchema
     const outputPayloadSchema: Schema | undefined =
-      this.hooks.transformOutput?.transformOutputSchema || this.outputSchema
+      this.hooks.transformOutput?.transformOutputSchema ?? this.outputSchema
 
     const eventBridgeConfig: Complete<DefinitionEventBridgeConfig> = {
       durable: this.durable,
diff --git a/packages/core/src/core/ConfigStore/ConfigStoreBaseClass.impl.ts b/packages/core/src/core/ConfigStore/ConfigStoreBaseClass.impl.ts
index 1e0e4a340..6649e5623 100644
--- a/packages/core/src/core/ConfigStore/ConfigStoreBaseClass.impl.ts
+++ b/packages/core/src/core/ConfigStore/ConfigStoreBaseClass.impl.ts
@@ -26,7 +26,7 @@ export abstract class ConfigStoreBaseClass<ConfigStoreConfigType extends Record<
   cache: ConfigStoreCacheMap = new Map()
 
   constructor(name: string, config: StoreBaseConfig<ConfigStoreConfigType>) {
-    const logger = config?.logger || initLogger(config?.logLevel)
+    const logger = config?.logger ?? initLogger(config?.logLevel)
     this.logger = logger.getChildLogger({ name })
 
     this.name = name
diff --git a/packages/core/src/core/Error/HandledError.impl.ts b/packages/core/src/core/Error/HandledError.impl.ts
index f8a56fe06..0ce93c45a 100644
--- a/packages/core/src/core/Error/HandledError.impl.ts
+++ b/packages/core/src/core/Error/HandledError.impl.ts
@@ -16,7 +16,7 @@ export class HandledError extends Error {
     public traceId?: TraceId,
   ) {
     /* Calling the constructor of the parent class (Error) and passing the message. */
-    super(message || getErrorMessageForCode(errorCode))
+    super(message ?? getErrorMessageForCode(errorCode))
     Error.captureStackTrace(this, this.constructor)
 
     Object.setPrototypeOf(this, HandledError.prototype)
@@ -52,7 +52,7 @@ export class HandledError extends Error {
       t = err.traceId
     }
 
-    const error = new HandledError(errorCode || StatusCode.InternalServerError, err.message, data, traceId || t)
+    const error = new HandledError(errorCode ?? StatusCode.InternalServerError, err.message, data, traceId ?? t)
     error.stack = err.stack
     error.cause = err.cause
     return error
@@ -67,7 +67,7 @@ export class HandledError extends Error {
       status: this.errorCode,
       message: this.message,
       data: this.data,
-      traceId: this.traceId || traceId,
+      traceId: this.traceId ?? traceId,
     })
 
     return errorResponse
diff --git a/packages/core/src/core/Error/UnhandledError.impl.ts b/packages/core/src/core/Error/UnhandledError.impl.ts
index 616be0fc8..a4648cd36 100644
--- a/packages/core/src/core/Error/UnhandledError.impl.ts
+++ b/packages/core/src/core/Error/UnhandledError.impl.ts
@@ -17,7 +17,7 @@ export class UnhandledError extends Error {
     public data?: unknown,
     public traceId?: TraceId,
   ) {
-    super(message || getErrorMessageForCode(errorCode))
+    super(message ?? getErrorMessageForCode(errorCode))
     Error.captureStackTrace(this, this.constructor)
 
     Object.setPrototypeOf(this, UnhandledError.prototype)
@@ -48,7 +48,7 @@ export class UnhandledError extends Error {
     if (err instanceof HandledError || err instanceof UnhandledError) {
       t = err.traceId
     }
-    const error = new UnhandledError(errorCode || StatusCode.InternalServerError, err.message, data, traceId || t)
+    const error = new UnhandledError(errorCode ?? StatusCode.InternalServerError, err.message, data, traceId ?? t)
     error.stack = err.stack
     error.cause = err.cause
     return error
diff --git a/packages/core/src/core/EventBridge/EventBridgeBaseClass.impl.ts b/packages/core/src/core/EventBridge/EventBridgeBaseClass.impl.ts
index c369c70ec..32b4bc373 100644
--- a/packages/core/src/core/EventBridge/EventBridgeBaseClass.impl.ts
+++ b/packages/core/src/core/EventBridge/EventBridgeBaseClass.impl.ts
@@ -30,19 +30,19 @@ export class EventBridgeBaseClass<ConfigType> extends GenericEventEmitter<EventB
   constructor(name: string, config: EventBridgeConfig<ConfigType>) {
     super()
     this.name = name
-    const logger = config?.logger || initLogger(config?.logLevel)
+    const logger = config?.logger ?? initLogger(config?.logLevel)
     this.logger = logger.getChildLogger({ name })
 
-    this.instanceId = config.instanceId || getNewInstanceId()
+    this.instanceId = config.instanceId ?? getNewInstanceId()
     this.config = {
       logger: logger.getChildLogger({ name }),
       instanceId: this.instanceId,
-      defaultCommandTimeout: config.defaultCommandTimeout || 30000,
+      defaultCommandTimeout: config.defaultCommandTimeout ?? 30000,
       spanProcessor: undefined,
       ...config,
     }
 
-    this.defaultCommandTimeout = config.defaultCommandTimeout || 30000
+    this.defaultCommandTimeout = config.defaultCommandTimeout ?? 30000
 
     const resource = Resource.default().merge(
       new Resource({
diff --git a/packages/core/src/core/SecretStore/SecretStoreBaseClass.impl.ts b/packages/core/src/core/SecretStore/SecretStoreBaseClass.impl.ts
index 4a51a212c..4ff93dcee 100644
--- a/packages/core/src/core/SecretStore/SecretStoreBaseClass.impl.ts
+++ b/packages/core/src/core/SecretStore/SecretStoreBaseClass.impl.ts
@@ -26,7 +26,7 @@ export abstract class SecretStoreBaseClass<SecretStoreConfigType extends Record<
   cache: SecretStoreCacheMap = new Map()
 
   constructor(name: string, config: StoreBaseConfig<SecretStoreConfigType>) {
-    const logger = config?.logger || initLogger(config?.logLevel)
+    const logger = config?.logger ?? initLogger(config?.logLevel)
     this.logger = logger.getChildLogger({ name })
 
     this.name = name
diff --git a/packages/core/src/core/Service/Service.impl.ts b/packages/core/src/core/Service/Service.impl.ts
index 6c7bc8e6f..d0b5aaf7d 100644
--- a/packages/core/src/core/Service/Service.impl.ts
+++ b/packages/core/src/core/Service/Service.impl.ts
@@ -670,7 +670,7 @@ export class Service<ConfigType = unknown> extends ServiceBaseClass implements S
           },
         )
 
-        if (Object.keys(command.hooks.afterGuard || {}).length) {
+        if (Object.keys(command.hooks.afterGuard ?? {}).length) {
           const guards = command.hooks.afterGuard
 
           await this.startActiveSpan(command.commandName + '.afterGuardHooks', {}, undefined, async () => {
@@ -893,7 +893,7 @@ export class Service<ConfigType = unknown> extends ServiceBaseClass implements S
             },
           )
 
-          if (Object.keys(subscription.hooks.afterGuard || {}).length) {
+          if (Object.keys(subscription.hooks.afterGuard ?? {}).length) {
             const guards = subscription.hooks.afterGuard
 
             await this.startActiveSpan(subscription.subscriptionName + '.afterGuardHooks', {}, undefined, async () => {
diff --git a/packages/core/src/core/Service/ServiceBaseClass/ServiceBaseClass.impl.ts b/packages/core/src/core/Service/ServiceBaseClass/ServiceBaseClass.impl.ts
index d023e43a9..8ed8a1334 100644
--- a/packages/core/src/core/Service/ServiceBaseClass/ServiceBaseClass.impl.ts
+++ b/packages/core/src/core/Service/ServiceBaseClass/ServiceBaseClass.impl.ts
@@ -110,8 +110,8 @@ export class ServiceBaseClass extends GenericEventEmitter<ServiceEvents> {
    */
   getTracer(name?: string, version?: string) {
     return this.traceProvider.getTracer(
-      name || this.serviceInfo.serviceName,
-      version || this.serviceInfo.serviceVersion,
+      name ?? this.serviceInfo.serviceName,
+      version ?? this.serviceInfo.serviceVersion,
     )
   }
 
diff --git a/packages/core/src/core/StateStore/StateStoreBaseClass.impl.ts b/packages/core/src/core/StateStore/StateStoreBaseClass.impl.ts
index b914ea800..a27d07641 100644
--- a/packages/core/src/core/StateStore/StateStoreBaseClass.impl.ts
+++ b/packages/core/src/core/StateStore/StateStoreBaseClass.impl.ts
@@ -22,7 +22,7 @@ export abstract class StateStoreBaseClass<StateStoreConfigType extends Record<st
   name: string
 
   constructor(name: string, config: StoreBaseConfig<StateStoreConfigType>) {
-    const logger = config?.logger || initLogger(config?.logLevel)
+    const logger = config?.logger ?? initLogger(config?.logLevel)
     this.logger = logger.getChildLogger({ name })
 
     this.name = name
diff --git a/packages/core/src/core/helper/createErrorResponse.impl.ts b/packages/core/src/core/helper/createErrorResponse.impl.ts
index c92902223..a2db28a0f 100644
--- a/packages/core/src/core/helper/createErrorResponse.impl.ts
+++ b/packages/core/src/core/helper/createErrorResponse.impl.ts
@@ -31,7 +31,7 @@ export const createErrorResponse = (
     errorTraceId = error.traceId
   }
 
-  const traceId = originalEBMessage.traceId || errorTraceId || getNewTraceId()
+  const traceId = originalEBMessage.traceId ?? errorTraceId ?? getNewTraceId()
 
   const errorResponse: Readonly<CommandErrorResponse> = Object.freeze({
     id: originalEBMessage.id,
diff --git a/packages/core/src/core/helper/createSuccessResponse.impl.ts b/packages/core/src/core/helper/createSuccessResponse.impl.ts
index dc6d7c350..8443ef4ba 100644
--- a/packages/core/src/core/helper/createSuccessResponse.impl.ts
+++ b/packages/core/src/core/helper/createSuccessResponse.impl.ts
@@ -24,7 +24,7 @@ export const createSuccessResponse = <T>(
   const successResponse: CommandSuccessResponse<T> = Object.freeze({
     id: originalEBMessage.id,
     correlationId: originalEBMessage.correlationId,
-    traceId: originalEBMessage.traceId || getNewTraceId(),
+    traceId: originalEBMessage.traceId ?? getNewTraceId(),
     principalId: originalEBMessage.principalId,
     tenantId: originalEBMessage.tenantId,
     contentType,
diff --git a/packages/core/src/helper/string/convertToCamelCase.impl.ts b/packages/core/src/helper/string/convertToCamelCase.impl.ts
index c6690c0c6..b4e25f935 100644
--- a/packages/core/src/helper/string/convertToCamelCase.impl.ts
+++ b/packages/core/src/helper/string/convertToCamelCase.impl.ts
@@ -11,6 +11,6 @@ export const convertToCamelCase = (str: string): string => {
     str
       .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
       ?.map((x) => x.slice(0, 1).toUpperCase() + x.slice(1).toLowerCase())
-      .join('') || str
+      .join('') ?? str
   return s.slice(0, 1).toLowerCase() + s.slice(1)
 }
diff --git a/packages/core/src/helper/string/convertToKebabCase.impl.ts b/packages/core/src/helper/string/convertToKebabCase.impl.ts
index 62470ff08..383ee3fac 100644
--- a/packages/core/src/helper/string/convertToKebabCase.impl.ts
+++ b/packages/core/src/helper/string/convertToKebabCase.impl.ts
@@ -10,4 +10,4 @@ export const convertToKebabCase = (str: string): string =>
   str
     .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
     ?.map((x) => x.toLowerCase())
-    .join('-') || str
+    .join('-') ?? str
diff --git a/packages/core/src/helper/string/convertToPascalCase.impl.ts b/packages/core/src/helper/string/convertToPascalCase.impl.ts
index 9a6c1b41f..9a6055fa5 100644
--- a/packages/core/src/helper/string/convertToPascalCase.impl.ts
+++ b/packages/core/src/helper/string/convertToPascalCase.impl.ts
@@ -10,4 +10,4 @@ export const convertToPascalCase = (str: string): string =>
   str
     .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
     ?.map((x) => x.charAt(0).toUpperCase() + x.slice(1).toLowerCase())
-    .join('') || str
+    .join('') ?? str
diff --git a/packages/core/src/helper/string/convertToSnakeCase.impl.ts b/packages/core/src/helper/string/convertToSnakeCase.impl.ts
index 2c7e8a4eb..33da530fb 100644
--- a/packages/core/src/helper/string/convertToSnakeCase.impl.ts
+++ b/packages/core/src/helper/string/convertToSnakeCase.impl.ts
@@ -10,4 +10,4 @@ export const convertToSnakeCase = (str: string): string =>
   str
     .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
     ?.map((x) => x.toLowerCase())
-    .join('_') || str
+    .join('_') ?? str
diff --git a/packages/core/src/mocks/getCommandTransformContext.mock.ts b/packages/core/src/mocks/getCommandTransformContext.mock.ts
index 517515ebc..4c608aa01 100644
--- a/packages/core/src/mocks/getCommandTransformContext.mock.ts
+++ b/packages/core/src/mocks/getCommandTransformContext.mock.ts
@@ -18,17 +18,17 @@ export const getCommandTransformContextMock = <MessagePayloadType = unknown, Mes
   const logger = getLoggerMock(sandbox)
   const stubs = {
     logger: logger.stubs,
-    wrapInSpan: sandbox?.stub() || stub(),
-    startActiveSpan: sandbox?.stub() || stub(),
-    getSecret: sandbox?.stub() || stub(),
-    setSecret: sandbox?.stub() || stub(),
-    removeSecret: sandbox?.stub() || stub(),
-    getConfig: sandbox?.stub() || stub(),
-    setConfig: sandbox?.stub() || stub(),
-    removeConfig: sandbox?.stub() || stub(),
-    getState: sandbox?.stub() || stub(),
-    setState: sandbox?.stub() || stub(),
-    removeState: sandbox?.stub() || stub(),
+    wrapInSpan: sandbox?.stub() ?? stub(),
+    startActiveSpan: sandbox?.stub() ?? stub(),
+    getSecret: sandbox?.stub() ?? stub(),
+    setSecret: sandbox?.stub() ?? stub(),
+    removeSecret: sandbox?.stub() ?? stub(),
+    getConfig: sandbox?.stub() ?? stub(),
+    setConfig: sandbox?.stub() ?? stub(),
+    removeConfig: sandbox?.stub() ?? stub(),
+    getState: sandbox?.stub() ?? stub(),
+    setState: sandbox?.stub() ?? stub(),
+    removeState: sandbox?.stub() ?? stub(),
   }
 
   const message = getCommandMessageMock({
diff --git a/packages/core/src/mocks/getEventBridge.mock.ts b/packages/core/src/mocks/getEventBridge.mock.ts
index e727d6781..de63cf116 100644
--- a/packages/core/src/mocks/getEventBridge.mock.ts
+++ b/packages/core/src/mocks/getEventBridge.mock.ts
@@ -9,16 +9,16 @@ import type { EventBridge } from '../core/index.js'
  * @group Unit test helper
  */
 export const getEventBridgeMock = (sandbox?: SinonSandbox): { mock: EventBridge; stubs: Record<string, SinonStub> } => {
-  const emitMessage = sandbox?.stub() || stub()
-  const registerCommand = sandbox?.stub() || stub()
-  const registerSubscription = sandbox?.stub() || stub()
-  const unregisterCommand = sandbox?.stub() || stub()
-  const unregisterSubscription = sandbox?.stub() || stub()
-  const invoke = sandbox?.stub() || stub()
-  const start = sandbox?.stub() || stub()
-  const isReady = sandbox?.stub().resolves(true) || stub().resolves(true)
-  const isHealthy = sandbox?.stub().resolves(true) || stub().resolves(true)
-  const destroy = sandbox?.stub().resolves() || stub().resolves()
+  const emitMessage = sandbox?.stub() ?? stub()
+  const registerCommand = sandbox?.stub() ?? stub()
+  const registerSubscription = sandbox?.stub() ?? stub()
+  const unregisterCommand = sandbox?.stub() ?? stub()
+  const unregisterSubscription = sandbox?.stub() ?? stub()
+  const invoke = sandbox?.stub() ?? stub()
+  const start = sandbox?.stub() ?? stub()
+  const isReady = sandbox?.stub().resolves(true) ?? stub().resolves(true)
+  const isHealthy = sandbox?.stub().resolves(true) ?? stub().resolves(true)
+  const destroy = sandbox?.stub().resolves() ?? stub().resolves()
 
   const mock: EventBridge = {
     name: 'EventBridgeMock',
diff --git a/packages/core/src/mocks/getLogger.mock.ts b/packages/core/src/mocks/getLogger.mock.ts
index 9179453a3..688b01f36 100644
--- a/packages/core/src/mocks/getLogger.mock.ts
+++ b/packages/core/src/mocks/getLogger.mock.ts
@@ -9,12 +9,12 @@ import type { Logger } from '../core/index.js'
  * @group Unit test helper
  */
 export const getLoggerMock = (sandbox?: SinonSandbox) => {
-  const info = sandbox?.stub() || stub()
-  const error = sandbox?.stub() || stub()
-  const warn = sandbox?.stub() || stub()
-  const debug = sandbox?.stub() || stub()
-  const trace = sandbox?.stub() || stub()
-  const fatal = sandbox?.stub() || stub()
+  const info = sandbox?.stub() ?? stub()
+  const error = sandbox?.stub() ?? stub()
+  const warn = sandbox?.stub() ?? stub()
+  const debug = sandbox?.stub() ?? stub()
+  const trace = sandbox?.stub() ?? stub()
+  const fatal = sandbox?.stub() ?? stub()
 
   const mock: Logger = {
     info,
diff --git a/packages/core/src/mocks/getSubscriptionContext.mock.ts b/packages/core/src/mocks/getSubscriptionContext.mock.ts
index 2012129a3..47535b58c 100644
--- a/packages/core/src/mocks/getSubscriptionContext.mock.ts
+++ b/packages/core/src/mocks/getSubscriptionContext.mock.ts
@@ -37,14 +37,14 @@ export const getSubscriptionContextMock = <Invokes = {}, EmitListType = {}>(
           traceFlags: 0,
         }
       },
-      setAttribute: sandbox?.stub() || stub(),
-      setAttributes: sandbox?.stub() || stub(),
-      addEvent: sandbox?.stub() || stub(),
-      setStatus: sandbox?.stub() || stub(),
-      updateName: sandbox?.stub() || stub(),
-      end: sandbox?.stub() || stub(),
+      setAttribute: sandbox?.stub() ?? stub(),
+      setAttributes: sandbox?.stub() ?? stub(),
+      addEvent: sandbox?.stub() ?? stub(),
+      setStatus: sandbox?.stub() ?? stub(),
+      updateName: sandbox?.stub() ?? stub(),
+      end: sandbox?.stub() ?? stub(),
       isRecording: () => true,
-      recordException: (sandbox?.stub() || stub()).callsFake((err: any) => {
+      recordException: (sandbox?.stub() ?? stub()).callsFake((err: any) => {
         // eslint-disable-next-line no-console
         console.error(err)
       }),
@@ -95,7 +95,7 @@ export const getSubscriptionContextMock = <Invokes = {}, EmitListType = {}>(
             serviceTarget: name,
           }
           if (!invokeMocks[na.serviceName][na.serviceVersion][na.serviceTarget]) {
-            invokeMocks[na.serviceName][na.serviceVersion][na.serviceTarget] = sandbox?.stub() || stub()
+            invokeMocks[na.serviceName][na.serviceVersion][na.serviceTarget] = sandbox?.stub() ?? stub()
 
             invokeMocks[na.serviceName][na.serviceVersion][na.serviceTarget].rejects(
               new Error(
@@ -109,28 +109,28 @@ export const getSubscriptionContextMock = <Invokes = {}, EmitListType = {}>(
     }) as TFaux
   }
 
-  const eventList = Object.keys(emitList || {}).reduce((prev, current) => {
+  const eventList = Object.keys(emitList ?? {}).reduce((prev, current) => {
     return {
       ...prev,
-      [current]: sandbox?.stub() || stub().resolves(),
+      [current]: sandbox?.stub() ?? stub().resolves(),
     }
   }, {}) as FromEmitToOtherType<EmitListType, SinonStub>
 
   const stubs = {
     logger: logger.stubs,
     emit: eventList,
-    invoke: sandbox?.stub() || stub(),
-    wrapInSpan: sandbox?.stub() || stub(),
-    startActiveSpan: sandbox?.stub() || stub(),
-    getSecret: sandbox?.stub() || stub(),
-    setSecret: sandbox?.stub() || stub(),
-    removeSecret: sandbox?.stub() || stub(),
-    getConfig: sandbox?.stub() || stub(),
-    setConfig: sandbox?.stub() || stub(),
-    removeConfig: sandbox?.stub() || stub(),
-    getState: sandbox?.stub() || stub(),
-    setState: sandbox?.stub() || stub(),
-    removeState: sandbox?.stub() || stub(),
+    invoke: sandbox?.stub() ?? stub(),
+    wrapInSpan: sandbox?.stub() ?? stub(),
+    startActiveSpan: sandbox?.stub() ?? stub(),
+    getSecret: sandbox?.stub() ?? stub(),
+    setSecret: sandbox?.stub() ?? stub(),
+    removeSecret: sandbox?.stub() ?? stub(),
+    getConfig: sandbox?.stub() ?? stub(),
+    setConfig: sandbox?.stub() ?? stub(),
+    removeConfig: sandbox?.stub() ?? stub(),
+    getState: sandbox?.stub() ?? stub(),
+    setState: sandbox?.stub() ?? stub(),
+    removeState: sandbox?.stub() ?? stub(),
     service: getInvokeProxy<FromInvokeToOtherType<Invokes, SinonStub>>(),
   }
 
diff --git a/packages/core/src/mocks/getSubscriptionTransformContext.mock.ts b/packages/core/src/mocks/getSubscriptionTransformContext.mock.ts
index 5a0810827..1abff6847 100644
--- a/packages/core/src/mocks/getSubscriptionTransformContext.mock.ts
+++ b/packages/core/src/mocks/getSubscriptionTransformContext.mock.ts
@@ -13,17 +13,17 @@ export const getSubscriptionTransformContextMock = (message: EBMessage, sandbox?
   const logger = getLoggerMock(sandbox)
   const stubs = {
     logger: logger.stubs,
-    wrapInSpan: sandbox?.stub() || stub(),
-    startActiveSpan: sandbox?.stub() || stub(),
-    getSecret: sandbox?.stub() || stub(),
-    setSecret: sandbox?.stub() || stub(),
-    removeSecret: sandbox?.stub() || stub(),
-    getConfig: sandbox?.stub() || stub(),
-    setConfig: sandbox?.stub() || stub(),
-    removeConfig: sandbox?.stub() || stub(),
-    getState: sandbox?.stub() || stub(),
-    setState: sandbox?.stub() || stub(),
-    removeState: sandbox?.stub() || stub(),
+    wrapInSpan: sandbox?.stub() ?? stub(),
+    startActiveSpan: sandbox?.stub() ?? stub(),
+    getSecret: sandbox?.stub() ?? stub(),
+    setSecret: sandbox?.stub() ?? stub(),
+    removeSecret: sandbox?.stub() ?? stub(),
+    getConfig: sandbox?.stub() ?? stub(),
+    setConfig: sandbox?.stub() ?? stub(),
+    removeConfig: sandbox?.stub() ?? stub(),
+    getState: sandbox?.stub() ?? stub(),
+    setState: sandbox?.stub() ?? stub(),
+    removeState: sandbox?.stub() ?? stub(),
   }
 
   const mock: SubscriptionTransformFunctionContext = {
diff --git a/packages/core/src/mocks/messages/getCommandErrorMessage.mock.ts b/packages/core/src/mocks/messages/getCommandErrorMessage.mock.ts
index cedfaab7f..bf9abdeba 100644
--- a/packages/core/src/mocks/messages/getCommandErrorMessage.mock.ts
+++ b/packages/core/src/mocks/messages/getCommandErrorMessage.mock.ts
@@ -18,7 +18,7 @@ export const getCommandErrorMessageMock = (
   input?: Partial<CommandErrorResponse>,
   commandMessage?: Command,
 ): Readonly<CommandErrorResponse> => {
-  const cmdMessage: Readonly<Command<unknown, unknown>> = commandMessage || getCommandMessageMock()
+  const cmdMessage: Readonly<Command<unknown, unknown>> = commandMessage ?? getCommandMessageMock()
 
   const successResponse: Readonly<CommandErrorResponse> = Object.freeze({
     ...createErrorResponse(getNewInstanceId(), cmdMessage, error?.errorCode, error),
diff --git a/packages/core/src/mocks/messages/getCommandMessage.mock.ts b/packages/core/src/mocks/messages/getCommandMessage.mock.ts
index 286a920bd..2a0bbb92f 100644
--- a/packages/core/src/mocks/messages/getCommandMessage.mock.ts
+++ b/packages/core/src/mocks/messages/getCommandMessage.mock.ts
@@ -44,7 +44,7 @@ export const getCommandMessageMock = <Payload = unknown, Parameter = unknown>(
     },
     payload: {
       payload: input?.payload?.payload as Payload,
-      parameter: (input?.payload?.parameter || {}) as Parameter,
+      parameter: (input?.payload?.parameter ?? {}) as Parameter,
     },
     ...input,
   })
diff --git a/packages/core/src/mocks/messages/getCommandSuccessMessage.mock.ts b/packages/core/src/mocks/messages/getCommandSuccessMessage.mock.ts
index 18dd937f1..0758627d6 100644
--- a/packages/core/src/mocks/messages/getCommandSuccessMessage.mock.ts
+++ b/packages/core/src/mocks/messages/getCommandSuccessMessage.mock.ts
@@ -12,10 +12,10 @@ export const getCommandSuccessMessageMock = <PayloadType>(
   input?: Partial<CommandSuccessResponse<PayloadType>>,
   commandMessage?: Command,
 ): Readonly<CommandSuccessResponse<PayloadType>> => {
-  const cmdMessage: Readonly<Command<unknown, unknown>> = commandMessage || getCommandMessageMock()
+  const cmdMessage: Readonly<Command<unknown, unknown>> = commandMessage ?? getCommandMessageMock()
 
   const successResponse: Readonly<CommandSuccessResponse<PayloadType>> = Object.freeze({
-    ...createSuccessResponse(commandMessage?.receiver.instanceId || getNewInstanceId(), cmdMessage, payload),
+    ...createSuccessResponse(commandMessage?.receiver.instanceId ?? getNewInstanceId(), cmdMessage, payload),
     ...input,
   })
 
diff --git a/packages/core/src/zodOpenApi/zodOpenApi.impl.ts b/packages/core/src/zodOpenApi/zodOpenApi.impl.ts
index c36c28fc3..2367ecce0 100644
--- a/packages/core/src/zodOpenApi/zodOpenApi.impl.ts
+++ b/packages/core/src/zodOpenApi/zodOpenApi.impl.ts
@@ -24,7 +24,7 @@ interface ParsingArgs<T> {
 }
 
 export function extendApi<T extends OpenApiZodAny>(schema: T, SchemaObject: SchemaObject = {}): T {
-  schema.metaOpenApi = Object.assign(schema.metaOpenApi || {}, SchemaObject)
+  schema.metaOpenApi = Object.assign(schema.metaOpenApi ?? {}, SchemaObject)
   return schema
 }
 
diff --git a/packages/dapr-sdk/src/DaprClient/DaprClient.impl.ts b/packages/dapr-sdk/src/DaprClient/DaprClient.impl.ts
index f505eacee..88a847094 100644
--- a/packages/dapr-sdk/src/DaprClient/DaprClient.impl.ts
+++ b/packages/dapr-sdk/src/DaprClient/DaprClient.impl.ts
@@ -17,25 +17,25 @@ import { DAPR_API_VERSION } from '../types/index.js'
 export class DaprClient extends HttpClient<EventBridgeConfig<DaprEventBridgeConfig>> implements HttpEventBridgeClient {
   getInternalPathForSubscription(address: EBMessageAddress) {
     // [baseUrl]/v1.0/invoke/app-user-v1/method/purista/subscription/[subscription-name]
-    return join(this.config.pathPrefix || 'purista', 'subscription', convertToKebabCase(address.serviceTarget))
+    return join(this.config.pathPrefix ?? 'purista', 'subscription', convertToKebabCase(address.serviceTarget))
   }
 
   getInternalPathForCommand(address: EBMessageAddress) {
     // [baseUrl]/v1.0/invoke/user-v1/method/purista/command/[command-name]
-    return join(this.config.pathPrefix || 'purista', 'command', convertToKebabCase(address.serviceTarget))
+    return join(this.config.pathPrefix ?? 'purista', 'command', convertToKebabCase(address.serviceTarget))
   }
 
   getApiPathForCommand(addess: EBMessageAddress, metadata: HttpExposedServiceMeta) {
     // [baseUrl]/api/v1/[command expose.http.path]
-    return join(this.config.apiPrefix || 'api', `v${addess.serviceVersion}`, metadata.expose.http.path)
+    return join(this.config.apiPrefix ?? 'api', `v${addess.serviceVersion}`, metadata.expose.http.path)
   }
 
   async invoke(command: Command, headers?: Record<string, string>, timeout?: number): Promise<CommandResponse> {
     // [baseUrl]/v1.0/invoke/user-v1/method/purista/command/[commandName]
     const path = join(
-      this.config.clientConfig?.daprApiVersion || DAPR_API_VERSION,
+      this.config.clientConfig?.daprApiVersion ?? DAPR_API_VERSION,
       'invoke',
-      `${this.config.clientConfig?.appPrefix || ''}${convertToKebabCase(
+      `${this.config.clientConfig?.appPrefix ?? ''}${convertToKebabCase(
         command.receiver.serviceName,
       )}-v${convertToKebabCase(command.receiver.serviceVersion)}`,
       'method',
@@ -51,9 +51,9 @@ export class DaprClient extends HttpClient<EventBridgeConfig<DaprEventBridgeConf
     }
 
     const path = join(
-      this.config.clientConfig?.daprApiVersion || DAPR_API_VERSION,
+      this.config.clientConfig?.daprApiVersion ?? DAPR_API_VERSION,
       'publish',
-      this.config.clientConfig?.pubSubName || 'pubsub',
+      this.config.clientConfig?.pubSubName ?? 'pubsub',
       message.eventName,
     )
 
@@ -62,7 +62,7 @@ export class DaprClient extends HttpClient<EventBridgeConfig<DaprEventBridgeConf
 
   async isSidecarAvailable() {
     try {
-      const path = join(this.config.clientConfig?.daprApiVersion || DAPR_API_VERSION, 'metadata')
+      const path = join(this.config.clientConfig?.daprApiVersion ?? DAPR_API_VERSION, 'metadata')
       const result = await this.get(path)
       return !!result
     } catch (e) {
diff --git a/packages/dapr-sdk/src/DaprClient/getDefaultClientConfig.impl.ts b/packages/dapr-sdk/src/DaprClient/getDefaultClientConfig.impl.ts
index 0c31fadf7..a1088bf7f 100644
--- a/packages/dapr-sdk/src/DaprClient/getDefaultClientConfig.impl.ts
+++ b/packages/dapr-sdk/src/DaprClient/getDefaultClientConfig.impl.ts
@@ -2,8 +2,8 @@ import { DAPR_API_VERSION, DEFAULT_DAPR_HOST, DEFAULT_DAPR_PORT } from '../types
 
 export const getDefaultClientConfig = () => {
   return {
-    daprHost: process.env.DAPR_HOST || DEFAULT_DAPR_HOST,
-    daprPort: process.env.DAPR_HTTP_PORT || DEFAULT_DAPR_PORT,
+    daprHost: process.env.DAPR_HOST ?? DEFAULT_DAPR_HOST,
+    daprPort: process.env.DAPR_HTTP_PORT ?? DEFAULT_DAPR_PORT,
     daprApiToken: undefined,
     isKeepAlive: true,
     pubSubName: 'pubsub',
diff --git a/packages/dapr-sdk/src/DaprConfigStore/DaprConfigStore.impl.ts b/packages/dapr-sdk/src/DaprConfigStore/DaprConfigStore.impl.ts
index d80e727ae..1891f46fe 100644
--- a/packages/dapr-sdk/src/DaprConfigStore/DaprConfigStore.impl.ts
+++ b/packages/dapr-sdk/src/DaprConfigStore/DaprConfigStore.impl.ts
@@ -17,7 +17,7 @@ export class DaprConfigStore extends ConfigStoreBaseClass<DaprConfigStoreConfig>
   private client: HttpClient<DaprClientConfig>
 
   constructor(config?: StoreBaseConfig<DaprConfigStoreConfig>) {
-    super(config?.configStoreName || 'DaprConfigStore', { ...config })
+    super(config?.configStoreName ?? 'DaprConfigStore', { ...config })
     const logger = this.logger
     const conf = {
       configStoreName: 'configStore',
@@ -56,7 +56,7 @@ export class DaprConfigStore extends ConfigStoreBaseClass<DaprConfigStoreConfig>
   ): Promise<ObjectWithKeysFromStringArray<ConfigNames>> {
     const fetchConfigFromStore = async (configName: string) => {
       const path = join(
-        this.config.clientConfig?.daprApiToken || DAPR_API_VERSION,
+        this.config.clientConfig?.daprApiToken ?? DAPR_API_VERSION,
         'configuration',
         this.config.configStoreName as string,
       )
diff --git a/packages/dapr-sdk/src/DaprEventBridge/DaprEventBridge.impl.ts b/packages/dapr-sdk/src/DaprEventBridge/DaprEventBridge.impl.ts
index efdeda630..b1ccff5c8 100644
--- a/packages/dapr-sdk/src/DaprEventBridge/DaprEventBridge.impl.ts
+++ b/packages/dapr-sdk/src/DaprEventBridge/DaprEventBridge.impl.ts
@@ -49,7 +49,7 @@ export class DaprEventBridge extends HttpEventBridge<DaprEventBridgeConfig> impl
       ...config,
     }
 
-    const logger = conf.logger || initLogger(config.logLevel, { name: conf.name || 'DaprEventBridge' })
+    const logger = conf.logger ?? initLogger(config.logLevel, { name: conf.name || 'DaprEventBridge' })
 
     const clientConfig = conf.clientConfig
 
diff --git a/packages/dapr-sdk/src/DaprEventBridge/getDefaultConfig.impl.ts b/packages/dapr-sdk/src/DaprEventBridge/getDefaultConfig.impl.ts
index 1a9eba8d6..c789392dd 100644
--- a/packages/dapr-sdk/src/DaprEventBridge/getDefaultConfig.impl.ts
+++ b/packages/dapr-sdk/src/DaprEventBridge/getDefaultConfig.impl.ts
@@ -5,7 +5,7 @@ export const getDefaultConfig = () => {
 
   return {
     name: 'DaprEventBridge',
-    serverHost: process.env.SERVER_HOST || '127.0.0.1',
+    serverHost: process.env.SERVER_HOST ?? '127.0.0.1',
     serverPort,
     pathPrefix: 'purista',
     apiPrefix: 'api',
diff --git a/packages/dapr-sdk/src/DaprSecretStore/DaprSecretStore.impl.ts b/packages/dapr-sdk/src/DaprSecretStore/DaprSecretStore.impl.ts
index 5e77bc9c8..113db017f 100644
--- a/packages/dapr-sdk/src/DaprSecretStore/DaprSecretStore.impl.ts
+++ b/packages/dapr-sdk/src/DaprSecretStore/DaprSecretStore.impl.ts
@@ -18,7 +18,7 @@ export class DaprSecretStore extends SecretStoreBaseClass<DaprSecretStoreConfig>
   private client: HttpClient<DaprClientConfig>
 
   constructor(config?: StoreBaseConfig<DaprSecretStoreConfig>) {
-    super(config?.secretStoreName || 'DaprSecretStore', { ...config })
+    super(config?.secretStoreName ?? 'DaprSecretStore', { ...config })
     const logger = this.logger
     const conf = {
       secretStoreName: 'secretStore',
@@ -57,7 +57,7 @@ export class DaprSecretStore extends SecretStoreBaseClass<DaprSecretStoreConfig>
   ): Promise<ObjectWithKeysFromStringArray<SecretNames, string | undefined>> {
     const fetchSecretFromStore = async (secretName: string) => {
       const path = join(
-        this.config.clientConfig?.daprApiToken || DAPR_API_VERSION,
+        this.config.clientConfig?.daprApiToken ?? DAPR_API_VERSION,
         'secrets',
         this.config.secretStoreName as string,
         secretName,
diff --git a/packages/dapr-sdk/src/DaprStateStore/DaprStateStore.impl.ts b/packages/dapr-sdk/src/DaprStateStore/DaprStateStore.impl.ts
index e4aa9b3a4..d9c095b3d 100644
--- a/packages/dapr-sdk/src/DaprStateStore/DaprStateStore.impl.ts
+++ b/packages/dapr-sdk/src/DaprStateStore/DaprStateStore.impl.ts
@@ -16,7 +16,7 @@ export class DaprStateStore extends StateStoreBaseClass<DaprStateStoreConfig> {
   private client: HttpClient<DaprClientConfig>
 
   constructor(config?: StoreBaseConfig<DaprStateStoreConfig>) {
-    super(config?.stateStoreName || 'DaprStateStore', { ...config })
+    super(config?.stateStoreName ?? 'DaprStateStore', { ...config })
     const logger = this.logger
     const conf = {
       stateStoreName: 'stateStore',
@@ -55,7 +55,7 @@ export class DaprStateStore extends StateStoreBaseClass<DaprStateStoreConfig> {
   ): Promise<ObjectWithKeysFromStringArray<StateNames>> {
     const fetchStatesFromStore = async (stateName: string) => {
       const path = join(
-        this.config.clientConfig?.daprApiToken || DAPR_API_VERSION,
+        this.config.clientConfig?.daprApiToken ?? DAPR_API_VERSION,
         'state',
         this.config.stateStoreName as string,
         stateName,
@@ -73,7 +73,7 @@ export class DaprStateStore extends StateStoreBaseClass<DaprStateStoreConfig> {
     const returnValue: Record<string, string> = {}
 
     stateNames.forEach((value, index) => {
-      returnValue[value] = result[index] as string
+      returnValue[value] = result[index]
     })
 
     return returnValue as ObjectWithKeysFromStringArray<StateNames>
@@ -81,7 +81,7 @@ export class DaprStateStore extends StateStoreBaseClass<DaprStateStoreConfig> {
 
   protected async setStateImpl(stateName: string, stateValue: unknown) {
     const path = join(
-      this.config.clientConfig?.daprApiToken || DAPR_API_VERSION,
+      this.config.clientConfig?.daprApiToken ?? DAPR_API_VERSION,
       'state',
       this.config.stateStoreName as string,
     )
@@ -98,7 +98,7 @@ export class DaprStateStore extends StateStoreBaseClass<DaprStateStoreConfig> {
 
   protected async removeStateImpl(stateName: string) {
     const path = join(
-      this.config.clientConfig?.daprApiToken || DAPR_API_VERSION,
+      this.config.clientConfig?.daprApiToken ?? DAPR_API_VERSION,
       'state',
       this.config.stateStoreName as string,
       stateName,
diff --git a/packages/hono-http-server/src/helper/addPathToOpenApi.ts b/packages/hono-http-server/src/helper/addPathToOpenApi.ts
index 015c8a28b..46d865b95 100644
--- a/packages/hono-http-server/src/helper/addPathToOpenApi.ts
+++ b/packages/hono-http-server/src/helper/addPathToOpenApi.ts
@@ -21,16 +21,16 @@ export const addPathToOpenApi = (
 
   const method = expose.http.method.toLowerCase() as 'put' | 'post' | 'patch' | 'get' | 'delete'
 
-  const requestContentType = expose.contentTypeRequest || 'application/json'
-  const _requestEncodingType = expose.contentEncodingRequest || 'utf-8'
+  const requestContentType = expose.contentTypeRequest ?? 'application/json'
+  const _requestEncodingType = expose.contentEncodingRequest ?? 'utf-8'
 
-  const responseContentType = expose.contentTypeResponse || 'application/json'
-  const responseEncodingType = expose.contentEncodingResponse || 'utf-8'
+  const responseContentType = expose.contentTypeResponse ?? 'application/json'
+  const responseEncodingType = expose.contentEncodingResponse ?? 'utf-8'
 
   const traceIdParameter: ParameterObject = {
     in: 'header',
     required: false,
-    name: config.traceHeaderField || 'x-trace-id',
+    name: config.traceHeaderField ?? 'x-trace-id',
     schema: { type: 'string' },
     example: '022bcd32-0a7c-4635-90ce-7940d0b9793f',
     description: 'TraceID which can be used by business logic',
@@ -44,13 +44,13 @@ export const addPathToOpenApi = (
     description: 'see: https://www.w3.org/TR/trace-context/#traceparent-header-field-values',
   }
 
-  const securitySchema = Object.keys(openApiBuilder.rootDoc.components?.securitySchemes || {}).map((name) => ({
+  const securitySchema = Object.keys(openApiBuilder.rootDoc.components?.securitySchemes ?? {}).map((name) => ({
     [name]: [],
   }))
 
   const okCode = expose.outputPayload?.type ? StatusCode.OK : StatusCode.NoContent
 
-  const errorCodes: Set<StatusCode> = new Set([...(expose.http.openApi?.additionalStatusCodes || [])])
+  const errorCodes: Set<StatusCode> = new Set([...(expose.http.openApi?.additionalStatusCodes ?? [])])
 
   if (expose.http.openApi?.isSecure) {
     errorCodes.add(StatusCode.Unauthorized)
diff --git a/packages/hono-http-server/src/helper/getParameterDefinition.ts b/packages/hono-http-server/src/helper/getParameterDefinition.ts
index 9c0c460b7..7828ed807 100644
--- a/packages/hono-http-server/src/helper/getParameterDefinition.ts
+++ b/packages/hono-http-server/src/helper/getParameterDefinition.ts
@@ -35,7 +35,7 @@ export const getParameterDefinition = (path: string, parameterschema?: SchemaObj
       name,
       required,
       schema,
-      description: schema?.description || schema?.title,
+      description: schema?.description ?? schema?.title,
     }
   })
 }
diff --git a/packages/hono-http-server/src/helper/getQueryDefintion.ts b/packages/hono-http-server/src/helper/getQueryDefintion.ts
index e59b5a43c..36450bccc 100644
--- a/packages/hono-http-server/src/helper/getQueryDefintion.ts
+++ b/packages/hono-http-server/src/helper/getQueryDefintion.ts
@@ -29,7 +29,7 @@ export const getQueryDefintion = (
       name,
       required,
       schema,
-      description: schema?.description || schema?.title,
+      description: schema?.description ?? schema?.title,
     }
   })
 }
diff --git a/packages/httpserver/src/service/httpServer/v1/HttpServerClass.impl.ts b/packages/httpserver/src/service/httpServer/v1/HttpServerClass.impl.ts
index 58f80b2ce..7cf98a671 100644
--- a/packages/httpserver/src/service/httpServer/v1/HttpServerClass.impl.ts
+++ b/packages/httpserver/src/service/httpServer/v1/HttpServerClass.impl.ts
@@ -160,7 +160,7 @@ export class HttpServerClass<ConfigType extends HttpServerServiceV1ConfigRaw> ex
       }
     }
 
-    const apiBasePath = posix.join(this.config.apiMountPath || 'api', '/v*')
+    const apiBasePath = posix.join(this.config.apiMountPath ?? 'api', '/v*')
 
     this.server?.all(apiBasePath, async (request, reply) => {
       const parentContext = propagation.extract(context.active(), request.headers)
@@ -172,7 +172,7 @@ export class HttpServerClass<ConfigType extends HttpServerServiceV1ConfigRaw> ex
         addHeaders(span, reply)
 
         const match = (request.params as Record<string, string>)['*']
-        const path = posix.join(this.config.apiMountPath || 'api', `v${match}`)
+        const path = posix.join(this.config.apiMountPath ?? 'api', `v${match}`)
 
         const route = this.routes.find(request.method as Methods, path)
         const firstHandler = route.handlers[0]
diff --git a/packages/httpserver/src/service/httpServer/v1/routes/openapi/getOpenApiJson.impl.ts b/packages/httpserver/src/service/httpServer/v1/routes/openapi/getOpenApiJson.impl.ts
index b754c9d0e..dfb20fc27 100644
--- a/packages/httpserver/src/service/httpServer/v1/routes/openapi/getOpenApiJson.impl.ts
+++ b/packages/httpserver/src/service/httpServer/v1/routes/openapi/getOpenApiJson.impl.ts
@@ -17,13 +17,13 @@ import { OPENAPI_DEFAULT_INFO } from '../../httpServerServiceConfig.js'
  * @returns A route definition for the openApi.json file
  */
 export const getOpenApiJson = function (this: HttpServerClass<HttpServerServiceV1ConfigRaw>): RouteOptions {
-  const paths: Record<string, Record<string, unknown>> = this.config.openApi?.paths || {}
+  const paths: Record<string, Record<string, unknown>> = this.config.openApi?.paths ?? {}
 
   const p = (this.config.openApi?.path ? this.config.openApi.path : this.config.apiMountPath) as string
   const url = posix.join(p, '/openapi.json')
 
   const info = { ...OPENAPI_DEFAULT_INFO, ...this.config.openApi?.info }
-  const servers = this.config.openApi?.servers || [
+  const servers = this.config.openApi?.servers ?? [
     { url: `${this.config.fastify?.https ? 'https' : 'http'}://${this.config.domain}:${this.config.port}` },
   ]
   const components = this.config.openApi?.components
@@ -135,7 +135,7 @@ export const getOpenApiJson = function (this: HttpServerClass<HttpServerServiceV
           name,
           required,
           schema,
-          description: schema?.description || schema?.title,
+          description: schema?.description ?? schema?.title,
         }
       })
 
@@ -165,9 +165,9 @@ export const getOpenApiJson = function (this: HttpServerClass<HttpServerServiceV
             name,
             required,
             schema,
-            description: schema?.description || schema?.title,
+            description: schema?.description ?? schema?.title,
           }
-        }) || []
+        }) ?? []
 
       let path = definition.path
       routeParams.forEach((pathParamName) => {
@@ -180,7 +180,7 @@ export const getOpenApiJson = function (this: HttpServerClass<HttpServerServiceV
       if (['POST', 'PATCH', 'PUT'].includes(definition.method)) {
         requestBody = {
           content: {
-            [expose.contentTypeRequest || 'application/json']: {
+            [expose.contentTypeRequest ?? 'application/json']: {
               schema: expose.inputPayload,
             },
           },
@@ -289,7 +289,7 @@ export const getOpenApiJson = function (this: HttpServerClass<HttpServerServiceV
       const traceIdParameter: ParameterObject = {
         in: 'header',
         required: false,
-        name: this.config.traceHeaderField || 'x-trace-id',
+        name: this.config.traceHeaderField ?? 'x-trace-id',
         schema: { type: 'string' },
         example: '022bcd32-0a7c-4635-90ce-7940d0b9793f',
         description: 'TraceID which can be used by business logic',
@@ -318,7 +318,7 @@ export const getOpenApiJson = function (this: HttpServerClass<HttpServerServiceV
             [expose.outputPayload ? 200 : 204]: {
               description: definition.openApi?.description,
               content: {
-                [expose.contentTypeResponse || 'application/json']: {
+                [expose.contentTypeResponse ?? 'application/json']: {
                   schema: expose.outputPayload,
                 },
               },
diff --git a/packages/httpserver/src/service/httpServer/v1/subscription/serviceCommandsToRestApi/serviceCommandsToRestApiSubscriptionBuilder.ts b/packages/httpserver/src/service/httpServer/v1/subscription/serviceCommandsToRestApi/serviceCommandsToRestApiSubscriptionBuilder.ts
index df5e20d6c..ed9c499b2 100644
--- a/packages/httpserver/src/service/httpServer/v1/subscription/serviceCommandsToRestApi/serviceCommandsToRestApiSubscriptionBuilder.ts
+++ b/packages/httpserver/src/service/httpServer/v1/subscription/serviceCommandsToRestApi/serviceCommandsToRestApiSubscriptionBuilder.ts
@@ -38,7 +38,7 @@ export const serviceCommandsToRestApiSubscriptionBuilder = httpServerV1ServiceBu
     const serviceName = message.sender.serviceName
     const method = data.http.method
     const apiMountPath = this.config.apiMountPath
-    const url = posix.join(apiMountPath || '/api', `v${version}`, data.http.path)
+    const url = posix.join(apiMountPath ?? '/api', `v${version}`, data.http.path)
 
     data.http.path = url
 
@@ -46,8 +46,8 @@ export const serviceCommandsToRestApiSubscriptionBuilder = httpServerV1ServiceBu
       data.http.openApi.operationId = convertToSnakeCase(`${serviceName}_v${version}_${data.http.openApi.operationId}`)
     }
 
-    const contentType = data.contentTypeResponse || 'application/json'
-    const contentEncoding = data.contentEncodingResponse || 'utf-8'
+    const contentType = data.contentTypeResponse ?? 'application/json'
+    const contentEncoding = data.contentEncodingResponse ?? 'utf-8'
 
     const getHandler = () => {
       return async (request: FastifyRequest, reply: FastifyReply, parameter: Record<string, unknown>) => {
diff --git a/packages/k8s-sdk/src/getHttpServer.impl.ts b/packages/k8s-sdk/src/getHttpServer.impl.ts
index 5b3d02974..d1f9adf26 100644
--- a/packages/k8s-sdk/src/getHttpServer.impl.ts
+++ b/packages/k8s-sdk/src/getHttpServer.impl.ts
@@ -21,12 +21,12 @@ import { puristaVersion } from './version.js'
 export const getHttpServer = (input: GetHttpServerConfig, name = 'K8sHttpHelperServer') => {
   const { healthFn, services, hostname, apiMountPath } = input
 
-  const hostnameWithFallback = hostname || process.env.HOSTNAME
+  const hostnameWithFallback = hostname ?? process.env.HOSTNAME
 
   const logger = input.logger.getChildLogger({ name, puristaVersion, hostname: hostnameWithFallback })
   const app = new Hono()
 
-  if (input.enableHttpCompression || input.enableHttpCompression === undefined) {
+  if (input.enableHttpCompression ?? input.enableHttpCompression === undefined) {
     app.use('*', compress())
   }
 
diff --git a/packages/mqttbridge/src/MqttEventBridge.ts b/packages/mqttbridge/src/MqttEventBridge.ts
index e01148f21..0789af264 100644
--- a/packages/mqttbridge/src/MqttEventBridge.ts
+++ b/packages/mqttbridge/src/MqttEventBridge.ts
@@ -74,7 +74,7 @@ export class MqttBridge extends EventBridgeBaseClass<MqttBridgeConfig> implement
     const conf = {
       ...getDefaultMqttBridgeConfig(),
       ...config,
-      clientId: config?.clientId || config?.instanceId || getNewInstanceId(),
+      clientId: config?.clientId ?? config?.instanceId ?? getNewInstanceId(),
     }
     super('MqttBridge', conf)
   }
diff --git a/packages/mqttbridge/src/handler/getCommandHandler.impl.ts b/packages/mqttbridge/src/handler/getCommandHandler.impl.ts
index cd1c4223a..50ce1c706 100644
--- a/packages/mqttbridge/src/handler/getCommandHandler.impl.ts
+++ b/packages/mqttbridge/src/handler/getCommandHandler.impl.ts
@@ -67,7 +67,7 @@ export const getCommandHandler = (
                   ...result.sender,
                   instanceId: this.instanceId,
                 },
-                otp: result.otp || serializeOtp(),
+                otp: result.otp ?? serializeOtp(),
               }
 
               subSpan.setAttribute(PuristaSpanTag.SenderServiceName, responseMessage.sender.serviceName)
diff --git a/packages/mqttbridge/src/handler/handleCommandResponse.impl.ts b/packages/mqttbridge/src/handler/handleCommandResponse.impl.ts
index 9f7ae966e..72ea9084a 100644
--- a/packages/mqttbridge/src/handler/handleCommandResponse.impl.ts
+++ b/packages/mqttbridge/src/handler/handleCommandResponse.impl.ts
@@ -38,7 +38,7 @@ export const handleCommandResponse: IncomingMessageFunction = async function (me
         return
       }
 
-      const correlationId = packet.properties?.correlationData?.toString() || message.correlationId
+      const correlationId = packet.properties?.correlationData?.toString() ?? message.correlationId
 
       const invocation = this.pendingInvocations.get(correlationId)
 
diff --git a/packages/mqttbridge/src/topic/TopicRouter.ts b/packages/mqttbridge/src/topic/TopicRouter.ts
index cec7fa48a..4a25dba1e 100644
--- a/packages/mqttbridge/src/topic/TopicRouter.ts
+++ b/packages/mqttbridge/src/topic/TopicRouter.ts
@@ -11,7 +11,7 @@ export class TopicRouter {
   counter = 1
 
   constructor(logger?: Logger) {
-    const log = logger || initLogger()
+    const log = logger ?? initLogger()
     this.logger = log.getChildLogger({ name: 'TopicRouter' })
   }
 
diff --git a/packages/mqttbridge/src/topic/getSubscriptionTopic.impl.ts b/packages/mqttbridge/src/topic/getSubscriptionTopic.impl.ts
index ba083ce29..b4e63c26c 100644
--- a/packages/mqttbridge/src/topic/getSubscriptionTopic.impl.ts
+++ b/packages/mqttbridge/src/topic/getSubscriptionTopic.impl.ts
@@ -10,17 +10,17 @@ type GetSubscriptionTopicFn = (this: MqttBridge, subscription: Subscription) =>
 export const getSubscriptionTopic: GetSubscriptionTopicFn = function (subscription) {
   return join(
     this.config.topicPrefix,
-    convertToSnakeCase(subscription.messageType || '+'),
-    convertToSnakeCase(subscription.principalId || '+'),
-    convertToSnakeCase(subscription.tenantId || '+'),
-    convertToSnakeCase(subscription.sender?.instanceId || '+'),
-    convertToSnakeCase(subscription.sender?.serviceName || '+'),
-    convertToSnakeCase(subscription.sender?.serviceVersion || '+'),
-    convertToSnakeCase(subscription.sender?.serviceTarget || '+'),
-    convertToSnakeCase(subscription.eventName || '+'),
-    convertToSnakeCase(subscription.receiver?.instanceId || '+'),
-    convertToSnakeCase(subscription.receiver?.serviceName || '+'),
-    convertToSnakeCase(subscription.receiver?.serviceVersion || '+'),
-    convertToSnakeCase(subscription.receiver?.serviceTarget || '+'),
+    convertToSnakeCase(subscription.messageType ?? '+'),
+    convertToSnakeCase(subscription.principalId ?? '+'),
+    convertToSnakeCase(subscription.tenantId ?? '+'),
+    convertToSnakeCase(subscription.sender?.instanceId ?? '+'),
+    convertToSnakeCase(subscription.sender?.serviceName ?? '+'),
+    convertToSnakeCase(subscription.sender?.serviceVersion ?? '+'),
+    convertToSnakeCase(subscription.sender?.serviceTarget ?? '+'),
+    convertToSnakeCase(subscription.eventName ?? '+'),
+    convertToSnakeCase(subscription.receiver?.instanceId ?? '+'),
+    convertToSnakeCase(subscription.receiver?.serviceName ?? '+'),
+    convertToSnakeCase(subscription.receiver?.serviceVersion ?? '+'),
+    convertToSnakeCase(subscription.receiver?.serviceTarget ?? '+'),
   )
 }
diff --git a/packages/mqttbridge/src/topic/getTopicName.impl.ts b/packages/mqttbridge/src/topic/getTopicName.impl.ts
index ad86e6d98..4fb357ee3 100644
--- a/packages/mqttbridge/src/topic/getTopicName.impl.ts
+++ b/packages/mqttbridge/src/topic/getTopicName.impl.ts
@@ -34,16 +34,16 @@ export const getTopicName: GetTopicNameFn = function (message: EBMessage) {
   return join(
     this.config.topicPrefix,
     convertToSnakeCase(message.messageType),
-    convertToSnakeCase(message.principalId || empty),
-    convertToSnakeCase(message.tenantId || empty),
+    convertToSnakeCase(message.principalId ?? empty),
+    convertToSnakeCase(message.tenantId ?? empty),
     convertToSnakeCase(message.sender.instanceId),
     convertToSnakeCase(message.sender.serviceName),
     convertToSnakeCase(message.sender.serviceVersion),
     convertToSnakeCase(message.sender.serviceTarget),
-    convertToSnakeCase(message.eventName || empty),
-    convertToSnakeCase((message as Command).receiver?.instanceId || empty),
-    convertToSnakeCase((message as Command).receiver?.serviceName || empty),
-    convertToSnakeCase((message as Command).receiver?.serviceVersion || empty),
-    convertToSnakeCase((message as Command).receiver?.serviceTarget || empty),
+    convertToSnakeCase(message.eventName ?? empty),
+    convertToSnakeCase((message as Command).receiver?.instanceId ?? empty),
+    convertToSnakeCase((message as Command).receiver?.serviceName ?? empty),
+    convertToSnakeCase((message as Command).receiver?.serviceVersion ?? empty),
+    convertToSnakeCase((message as Command).receiver?.serviceTarget ?? empty),
   )
 }
diff --git a/packages/natsbridge/src/handler/getCommandHandler.impl.ts b/packages/natsbridge/src/handler/getCommandHandler.impl.ts
index 5af945251..77243e535 100644
--- a/packages/natsbridge/src/handler/getCommandHandler.impl.ts
+++ b/packages/natsbridge/src/handler/getCommandHandler.impl.ts
@@ -7,7 +7,6 @@ import type {
   CommandSuccessResponse,
   DefinitionEventBridgeConfig,
   EBMessageAddress,
-  InstanceId,
 } from '@purista/core'
 import {
   deserializeOtp,
@@ -83,7 +82,7 @@ export const getCommandHandler = (
                   ...result.sender,
                   instanceId: this.instanceId,
                 },
-                otp: result.otp || serializeOtp(),
+                otp: result.otp ?? serializeOtp(),
               }
 
               subSpan.setAttribute(PuristaSpanTag.SenderServiceName, responseMessage.sender.serviceName)
@@ -107,7 +106,7 @@ export const getCommandHandler = (
                   receiverServiceName: responseMessage.receiver.serviceName,
                   receiverServiceVersion: responseMessage.receiver.serviceVersion,
                   receiverServiceTarget: responseMessage.receiver.serviceTarget,
-                  receiverInstanceId: responseMessage.receiver.instanceId as InstanceId,
+                  receiverInstanceId: responseMessage.receiver.instanceId,
                 })
 
                 if (responseMessage.eventName) {
@@ -137,8 +136,8 @@ export const getCommandHandler = (
 
               // emit the message 2nd time as event
               if (
-                this.config.commandResponsePublishTwice === 'always' ||
-                (responseMessage.eventName && this.config.commandResponsePublishTwice === 'eventOnly') ||
+                (this.config.commandResponsePublishTwice === 'always' ||
+                  (responseMessage.eventName && this.config.commandResponsePublishTwice === 'eventOnly')) ??
                 (isCommandErrorResponse(responseMessage) && this.config.commandResponsePublishTwice === 'eventAndError')
               ) {
                 const eventTopic = getTopicName.bind(this)(responseMessage)
diff --git a/packages/natsbridge/src/topic/getSubscriptionTopic.impl.ts b/packages/natsbridge/src/topic/getSubscriptionTopic.impl.ts
index ea0cbf6c2..a36a12985 100644
--- a/packages/natsbridge/src/topic/getSubscriptionTopic.impl.ts
+++ b/packages/natsbridge/src/topic/getSubscriptionTopic.impl.ts
@@ -8,17 +8,17 @@ type GetSubscriptionTopicFn = (this: NatsBridge, subscription: Subscription) =>
 export const getSubscriptionTopic: GetSubscriptionTopicFn = function (subscription) {
   return [
     this.config.topicPrefix,
-    convertToSnakeCase(subscription.messageType || '*'),
-    convertToSnakeCase(subscription.principalId || '*'),
-    convertToSnakeCase(subscription.tenantId || '*'),
-    convertToSnakeCase(subscription.sender?.instanceId || '*'),
-    convertToSnakeCase(subscription.sender?.serviceName || '*'),
-    convertToSnakeCase(subscription.sender?.serviceVersion || '*'),
-    convertToSnakeCase(subscription.sender?.serviceTarget || '*'),
-    convertToSnakeCase(subscription.eventName || '*'),
-    convertToSnakeCase(subscription.receiver?.instanceId || '*'),
-    convertToSnakeCase(subscription.receiver?.serviceName || '*'),
-    convertToSnakeCase(subscription.receiver?.serviceVersion || '*'),
-    convertToSnakeCase(subscription.receiver?.serviceTarget || '*'),
+    convertToSnakeCase(subscription.messageType ?? '*'),
+    convertToSnakeCase(subscription.principalId ?? '*'),
+    convertToSnakeCase(subscription.tenantId ?? '*'),
+    convertToSnakeCase(subscription.sender?.instanceId ?? '*'),
+    convertToSnakeCase(subscription.sender?.serviceName ?? '*'),
+    convertToSnakeCase(subscription.sender?.serviceVersion ?? '*'),
+    convertToSnakeCase(subscription.sender?.serviceTarget ?? '*'),
+    convertToSnakeCase(subscription.eventName ?? '*'),
+    convertToSnakeCase(subscription.receiver?.instanceId ?? '*'),
+    convertToSnakeCase(subscription.receiver?.serviceName ?? '*'),
+    convertToSnakeCase(subscription.receiver?.serviceVersion ?? '*'),
+    convertToSnakeCase(subscription.receiver?.serviceTarget ?? '*'),
   ].join('.')
 }
diff --git a/packages/natsbridge/src/topic/getTopicName.impl.ts b/packages/natsbridge/src/topic/getTopicName.impl.ts
index 46f472b27..0dae9fe26 100644
--- a/packages/natsbridge/src/topic/getTopicName.impl.ts
+++ b/packages/natsbridge/src/topic/getTopicName.impl.ts
@@ -21,16 +21,16 @@ export const getTopicName: GetTopicNameFn = function (message: EBMessage) {
   return [
     this.config.topicPrefix,
     convertToSnakeCase(message.messageType),
-    convertToSnakeCase(message.principalId || empty),
-    convertToSnakeCase(message.tenantId || empty),
-    convertToSnakeCase(message.sender.instanceId || empty),
+    convertToSnakeCase(message.principalId ?? empty),
+    convertToSnakeCase(message.tenantId ?? empty),
+    convertToSnakeCase(message.sender.instanceId ?? empty),
     convertToSnakeCase(message.sender.serviceName),
     convertToSnakeCase(message.sender.serviceVersion),
     convertToSnakeCase(message.sender.serviceTarget),
-    convertToSnakeCase(message.eventName || empty),
-    convertToSnakeCase((message as Command).receiver?.instanceId || empty),
-    convertToSnakeCase((message as Command).receiver?.serviceName || empty),
-    convertToSnakeCase((message as Command).receiver?.serviceVersion || empty),
-    convertToSnakeCase((message as Command).receiver?.serviceTarget || empty),
+    convertToSnakeCase(message.eventName ?? empty),
+    convertToSnakeCase((message as Command).receiver?.instanceId ?? empty),
+    convertToSnakeCase((message as Command).receiver?.serviceName ?? empty),
+    convertToSnakeCase((message as Command).receiver?.serviceVersion ?? empty),
+    convertToSnakeCase((message as Command).receiver?.serviceTarget ?? empty),
   ].join('.')
 }