Principle of cross-chain message passing

Cross-chain messaging typically involves the following steps:

1. Message generation: Generate information or transactions that need to be transmitted on the source chain.

2. Message signature: Sign the generated message to ensure its authenticity and integrity.

3. message transmission:Transmit the signed message to the target chain.

4. Message verification: Verify the authenticity and integrity of the message on the target chain.

5. Message processing: Process the verified message on the target chain and perform corresponding operations.