What is the secure way to allow communication between a managed package component and a customer's custom component?
Answer
The secure way to enable communication between a managed package component and a customer's custom component is to use a Lightning Message Channel. However, the Lightning Message Channel should not be included in the managed package. Instead, customers should create their own exposed Lightning Message Channels for integration. This ensures the managed package remains secure and minimizes risks during the security review process. Additionally, you can provide an unlocked package to help customers with deployment.
What is the secure way to allow communication between a managed package component and a customer's custom component?
Recommended Answer Update
The secure way to enable communication between a managed package component and a customer's custom component is to use a Lightning Message Channel. However, the Lightning Message Channel should not be included in the managed package. Instead, customers should create their own Lightning Message Channels for integration. This ensures the managed package remains secure and minimizes risks during the security review process. Additionally, you can provide an unlocked package to help customers with deployment.
Reasoning
The original answer included the phrase 'exposed Lightning Message Channels' which could cause confusion about the isExposed=true setting. The AvoidLmcIsExposedTrue rule (severity 2) specifically flags Lightning Message Channels with isExposed=true as a security concern for managed packages. By removing the word 'exposed' when referring to customer-created channels, we eliminate potential confusion between the technical concept of customer-accessible channels and the specific isExposed metadata setting that triggers security violations. The recommendation maintains all original points while clarifying this important security distinction. The AvoidLmcIsExposedTrue rule relates directly to this FAQ because it addresses Lightning Message Channel security in managed packages, which is exactly what this FAQ is teaching developers to handle properly.