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Steel · hard

61. Steel: AccountValidation Trait

Fluent validation chains.

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Steel provides an `AccountValidation` trait with fluent helpers like `is_signer()`, `is_writable()`, `has_owner()`, and `has_seeds()`.

rust
user_info
    .is_signer()?
    .is_writable()?
    .has_owner(&program_id)?;

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  1. 1. How does Steel structure account security checks?

  2. 2. What does has_owner(&id) return in Steel if the owner mismatches?

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