anchor-security

Secure Anchor programs by enforcing signer constraints, validating account ownership, checking discriminators, and properly handling PDAs to prevent common Solana smart contract vulnerabilities during design, code review, and deployment.

During an Anchor code review, verify signer constraints, account relationships, owner validation, discriminators, initialization patterns, and CPI validation. Reviewing these areas ensures alignment with documented security patterns and prevents privilege escalation or account substitution attacks.

PDA handling and initialization patterns affect security by ensuring deterministic account derivation and preventing account reuse. Proper initialization with canonical seeds and bump seeds prevents attackers from hijacking uninitialized accounts or colliding PDA addresses in Anchor programs.

Validate CPI calls in Anchor by checking the calling program's ID, verifying signer privileges for invoked PDAs, and enforcing strict account constraints. Proper CPI validation prevents unauthorized cross-program invocations and protects against malicious program interactions.

Yes, this Anchor security guidance applies to production-grade Solana deployments. It consolidates patterns from the sealevel-attacks repository adapted for Anchor development, making it suitable for production hardening, security training, and professional smart contract assessments.

Anchor constraints provide strong account validation but require careful configuration of init patterns, owner checks, and discriminator verification. Limitations arise when custom validation logic bypasses framework constraints, requiring manual security reviews to catch edge cases not covered by default macros.