Cross-Chain Security and Program Lifecycle

Trace an EVM-to-Solana token or message transfer through a cross-chain interoperability protocol, including its source transaction, verification, and destination execution.

Design source-domain, sender, payload, finality, and replay-protection checks for a Solana program that receives messages from an EVM chain.

Use Anchor's `#[account(discriminator)]` to manage multiple account types within a single program.

Implement a versioning strategy for program state to facilitate data migrations.

Upgrade a deployed Solana program using the Solana CLI.

Manage the upgrade authority of a deployed program.

Explain common data migration strategies for upgrading program accounts.

Review a program for common security vulnerabilities like improper authority checks, account confusion, and integer overflows.