OApp Composing

A composed message refers to an OApp that invokes the LayerZero Endpoint method sendCompose to deliver a composed call to another application on the destination chain via lzCompose.

This pattern demonstrates horizontal composability, which differs from vertical composability in that the external call is now containerized as a new message packet; enabling the application to ensure that certain receipt logic remains separate from the external call itself.

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Since each composable call is created as a separate message packet via lzCompose, this pattern can be extended for as many steps as your application needs (B1 -> B2 -> B3, etc).