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Architecture · easy

2. The Accounts Model

Understanding Solana's fundamental data unit.

1 min read3 questionsup to 50 XPtopic 2/100

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Everything in Solana is an Account. An account has a public key (address), a lamport balance, a byte array (data), an owner (the program ID that has exclusive rights to write to this account's data), and an executable boolean flag.

Only the program designated as the account's owner can modify its data or debit its lamport balance.

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
  4. 4. Read every explanation, even for the answers you got right.

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Check your understanding

  1. 1. Which entity has permission to mutate an account's data field?

  2. 2. What does the executable boolean indicate on an account?

  3. 3. Can a non-owning program credit lamports to an account?

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