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Blockchain · hard

49. Auditing Rust On-chain Code

Common vulnerability classes.

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Audit for missing account ownership and signer checks, unchecked arithmetic in release builds, integer casts that truncate, and unvalidated PDA seeds. Use checked arithmetic, assert invariants explicitly, and keep instruction handlers small enough to reason about.

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  1. 1. Release-build arithmetic overflow…

  2. 2. Every passed account must be…

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