Anchor Errors

9 pages in this section.

How Anchor programs fail with #[error_code] and require!, emit structured events, budget logs, and become decodable for clients.

Explainer Errors Events Logging Anchor Errors Events

#[error_code] & require!

Learn to declare custom error codes in Anchor using #[error_code] enums and assert conditions with require! macros for client-decodable failures.

Rust Errors Events Logging Anchor Error Code Require

Custom Error Messages

Define custom error messages for Rust enum variants using #[msg("..."). Learn to map error codes in client-side applications and ensure stability.

Rust Errors Events Logging Anchor Errors Messages

Events with emit!

Learn to use #[event] types and the emit! macro to write structured logs for indexers. Understand when to use events and how they work.

Rust Errors Events Logging Anchor Events Emit

emit_cpi! & Self-CPI Events

Rust Errors Events Logging Anchor Emit Cpi Events

Logging & CU Cost

Rust Errors Events Logging Anchor Logging Compute

Client-Side Error Decoding

Rust Errors Events Logging Anchor Client Typescript

Errors & Events Best Practices

Learn best practices for creating observable and debuggable Anchor programs using typed errors, structured events, and minimal logging.

Rust Errors Events Logging Anchor Best Practices List

Anchor Errors Highlights Summary

A single-page roundup of every highlight bullet from the 8 pages in the Anchor Errors section, grouped by source page so you can scan all 46 takeaways without opening each article individually.

Highlights Summary Errors Events Logging Anchor

Anchor Errors

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Anchor Errors