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Architecture · easy

6. Program Derived Addresses (PDAs)

Deterministic addresses without private keys.

1 min read3 questionsup to 50 XPtopic 6/100

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PDAs are 32-byte addresses derived deterministically from a set of seeds and a program ID that do not lie on the Ed25519 elliptic curve (they have no corresponding private key). Only the owning program can sign on behalf of its PDAs using invoke_signed.

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.

Scoring

  • · Up to 30 XP from quiz accuracy.
  • · +15 XP for a perfect first attempt.
  • · +5 XP while a 3-day streak is running.
  • · 75% or higher marks the topic complete.

Check your understanding

  1. 1. What distinguishes a PDA from a normal wallet address?

  2. 2. Who can sign transactions for a Program Derived Address?

  3. 3. What is the bump seed in a PDA?

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