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Architecture · easy

8. Instruction Data and Serialization Formats

Borsh vs Bytemuck vs Zero-Copy serialization payloads.

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Instructions passed to Solana programs contain a program ID, an array of AccountMeta declarations (pubkey, is_signer, is_writable), and a raw byte payload. Borsh and Bytemuck are standard serialization formats across different frameworks.

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Check your understanding

  1. 1. What binary serialization format is traditionally standard in Solana and Anchor?

  2. 2. What does AccountMeta specify for each account passed to an instruction?

  3. 3. Why must read/write accounts be declared upfront in transactions?

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