Daily Challenges
Test your skills with a new coding challenge every day. One attempt per day -- make it count.
How it works
- A new challenge drops every day at 00:00 UTC
- You get exactly 1 attempt per challenge -- no retries
- Earn XP based on difficulty and speed
- Compete on the speed leaderboard for bragging rights
Daily Challenge
intermediateImplement a Vault Withdraw Instruction
Build a withdraw instruction for a Solana vault program using Anchor. The instruction must validate the signer is the vault owner, check sufficient balance, and transfer SOL from the vault PDA back to the owner. All five test cases must pass.
150 XP1 attempt per day
New challenge in08:25:58
Past Challenges
Build a Token Swap CPI
Mon, Feb 23
20m 43s
PassedPDA Seed Derivation
Sun, Feb 22
14m 5s
PassedAnchor Error Handling
Sat, Feb 21
30m 0s
FailedSPL Token Transfer
Fri, Feb 20
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MissedAccount Constraints
Thu, Feb 19
10m 22s
PassedHello Solana Program
Wed, Feb 18
5m 12s
PassedKeypair Generation
Tue, Feb 17
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MissedSpeed Leaderboard
Today#WalletTimeTests
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33nPwQ...6aLm4:055/5
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58mKjY...1bQr6:074/5
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72wNfA...3yPk8:093/5
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10Ct4Wm...6fRa11:382/5