Implementation: Build Core Program Logic in Rust/Anchor — Forge College

Ready to convert your design mapping into a working Solana program? Implementing core program logic in Rust and Anchor is the pivotal step that turns architecture into runnable, testable on‑chain code.

What you'll learn
In this lesson you will implement the program's core instruction handlers, Anchor account structs, and serialization strategies to match your design constraints. You'll see concrete patterns for translating EVM storage and entrypoints into program-owned accounts and PDA-managed slices, decide between BorshSerialize/BorshDeserialize vs. Anchor account patterns, and wire explicit ownership rules, account sizes, and signer constraints. The lesson emphasizes writing robust error enums and guard clauses first, keeping Anchor handlers thin by delegating business logic to small pure helpers, and structuring modules for unit testing and reuse. By the end you'll have runnable Rust/Anchor modules you can compile locally and iterate on with automated test scaffolding.

Who this is for
Intermediate developers migrating smart contracts from EVM to Solana. You should be comfortable with Solidity/EVM concepts and know Rust basics and Anchor fundamentals.

Key topics covered
- Anchor instruction handlers: thin orchestration, constraint checks, and state writes
- Account serialization: BorshSerialize/BorshDeserialize vs. Anchor Account patterns, packed Vec of T, dynamic mappings
- PDA seeds, program-owned accounts, account sizes, and ownership/signature rules
- Error handling patterns: define error enums and guard clauses (fail-first)
- Modular code patterns: pure helpers, testable units, and reusable modules
- Atomic vs. multi-step transactions and migration preconditions

Start building reliable Solana programs that reflect your migration design and are easy to test and iterate. Learn more and enroll at https://www.forge.college/

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