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Pinocchio · hard

49. Pinocchio: AccountInfo and Direct Borrowing

Zero-copy data and lamport mutation.

1 min read2 questionsup to 50 XPtopic 49/100

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Pinocchio's `AccountInfo` provides zero-copy access to `borrow_mut_data_unchecked()` and `borrow_mut_lamports_unchecked()`, avoiding runtime RefCell borrow flag overhead.

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Check your understanding

1. Why does Pinocchio offer unchecked borrow methods for account data?
Bypasses RefCell tracking to save compute units in validated contextsDisables Rust compilerTo allow data corruptionTo write to read-only accounts
2. Who is responsible for ensuring aliasing safety when using unchecked borrows in Pinocchio?
The developerThe Anchor macroThe validator runtimeThe client SDK

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