Program Lifecycle, Auditing, and Security

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.

Use Anchor's account constraints to mitigate common security risks like re-initialization and type confusion attacks.