May 12
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Are you confident you can recover from a broken program upgrade on Solana? Planning versioning, tests, and rollback procedures before upgrading reduces real-world operational risk and makes incidents reproducible. What you'll learn This lesson shows how to design tests and rollback procedures for upgradeable Anchor programs and how to produce a concise debug report that proves an upgrade failure and its recovery. You will learn how Anchor's upgrade flow interacts with migration entrypoints and on-chain state, how to write a test that simulates a broken migration, and how to automate a rollback that restores both the previous program binary and expected state. The lesson covers test scaffolding in TypeScript, example migration code, and assertions that validate restoration integrity so you can run the sequence in a local harness. Who this is for Intermediate developers who know Anchor basics and Rust smart contract structure and who want to harden upgrade processes with TDD-style rollback plans and reproducible diagnostics. Key topics covered - Anchor upgrade flow and the role of migration entrypoints - Designing tests that reproduce broken migrations and assert failure modes - Implementing an automated rollback that restores program binary and state - Building a local test harness: deploy baseline, run broken migration, execute rollback - Writing a debug report with reproduction steps, diagnostics, and recovery proof - Practical tips: version control, migration checkpoints, and risk mitigation Get the templates and follow-up lessons at https://www.forge.college/