Скачать или смотреть Stop Writing Manual Checks: Anchor Constraints Explained

Anchor’s #[account(...)] constraints are one of the most powerful features for writing secure and maintainable Solana smart contracts — but many developers don’t use them to their full potential.

In this video, we break down every major account constraint: what it does, when to use it, and how it helps protect your logic. Whether you're building with PDAs, SPL tokens, or system accounts, you'll learn how to replace boilerplate with clean, declarative safety checks.

✅ Covers all 18 major constraints
✅ Real-world examples
✅ Bonus: Comparison table + best practices

Perfect for Solana devs using Anchor — beginner or advanced.

Timecodes:
00:00 Intro
01:30 #[account(signer)] constraint: Signature required
03:01 #[account(mut)]: Mutable account access
04:33 #[account(init)]: Create and initialize a new account
06:23 #[account(init_if_needed)]: Initialize only if absent
08:00 init vs init_if_needed
08:30 What is a PDA (Program Derived Address)?
09:32 #[account(seeds, bump)]: Enforce PDA derivation
11:19 #[account(has_one = target)]: Relationship enforcement
13:15 #[account(address = expr)]: Exact public key match
15:15 #[account(owner = expr)]: Program ownership verification
17:19 #[account(executable)]: Must be a Program
19:00 #[account(zero)]: Must be uninitialized
21:26 #[account(close = target)]: Send lamports on close
23:49 #[account(constraint = expr)]: Custom condition check
26:00 #[account(realloc)]: Resize account data
28:00 SPL Constraints: #[account(token::* / mint::* / associated_token::* / *::token_program = expr)]
30:00 #[instruction(...)]: Instruction arguments for account validation
32:00 Outro

#solana #anchor #rust #blockchaindevelopment #smartcontracts