Build a Time-Locked Wallet on Solana

🏆 Bounty: Build a Time-Locked Wallet on Solana

Prize Pool: 150 - 100 - 50 USDC

Duration: 7 days

Level: Beginner-friendly (Solana Program + simple Frontend)

🔧 Objective

Create a Solana smart contract and simple frontend for a Time-Locked Wallet:

• A user deposits SOL or USDC into a PDA account.

• Funds are locked until a specified unlock timestamp.

• After the unlock time, the user (or designated recipient) can withdraw the funds.

💡 Why It Matters

This is a basic building block for many on-chain use cases:

• Grants with release schedules

• DAO-controlled disbursements

• Trust funds or delayed payouts

• Parental wallets or time-based savings

✅ Deliverables

To qualify for the prize, your submission must include:

1. Solana Program (using Anchor)

• ✅ Instruction: initialize_lock(amount, unlock_timestamp)

• ✅ Instruction: withdraw()

• ✅ Program owns a PDA account that holds the locked funds

• ✅ Lock must be enforced on-chain (not just frontend)

2. Frontend

• ✅ Form to create a time-locked wallet (input: amount + unlock time)

• ✅ Display wallet state (amount locked, unlock date)

• ✅ Button to withdraw if eligible (should fail if too early)

• ✅ Works with Phantom or Backpack wallet
  

3. Public GitHub Repo

• ✅ Program folder (Anchor)

• ✅ Frontend folder (React or Svelte or HTML/JS)

• ✅ README.md with clear instructions to run both

• ✅ Optional: deploy to devnet and include test account/demo

🧪 Bonus (Not Required)

You’ll earn bonus points if you:

• Use USDC (SPL token) instead of just SOL

• Add a countdown timer to unlock in the UI

• Write a simple test using Mocha/Chai or Anchor CLI

🧠 Tips & Resources

• Anchor Book

• @solana/web3.js Docs

• Use @coral-xyz/anchor in frontend

• Reference: SystemProgram.transfer()