docs(Lock): enhance contract documentation

[turkaturki]

Documentation has been added to Lock.sol to make it easier to understand for others. The contract, its variables, constructor, event, and functions are now documented with clear explanations

Summary by CodeRabbit

• New Features
  • Added a time-locked wallet contract that holds funds until a specified future date.
  • Enforces owner-only withdrawals and prevents access before the unlock time.
  • Automatically transfers the full balance to the owner upon eligible withdrawal.
  • Emits a withdrawal event with amount and timestamp for transparency.
  • Validates unlock time during deployment to prevent invalid schedules.

[coderabbitai]

Walkthrough

Implements a functional Solidity Lock contract: adds storage for unlockTime and owner, a Withdrawal event, a constructor enforcing future unlock time and owner assignment, and a withdraw function with time and owner checks that emits an event and transfers the full balance to the owner.

Changes

Cohort / File(s)	Summary
Solidity Lock contract contracts/Lock.sol	Implemented time-locked withdrawal logic: added unlockTime, owner, Withdrawal event; constructor validates future unlock timestamp and sets owner; withdraw enforces time and ownership, emits event, and transfers full balance to owner. Replaced placeholders with working logic.

Sequence Diagram(s)

sequenceDiagram
  autonumber
  actor Deployer
  participant Lock as Lock Contract

  rect rgb(235, 245, 255)
  Note over Deployer,Lock: Deployment
  Deployer->>Lock: new Lock(unlockTime)
  alt unlockTime <= block.timestamp
    Lock-->>Deployer: revert("Unlock time should be in the future")
  else valid time
    Lock->>Lock: set unlockTime, owner = msg.sender
    Lock-->>Deployer: deployed
  end
  end

  rect rgb(240, 255, 240)
  Note over Deployer,Lock: Withdrawal
  participant Owner as Owner (deployer)
  Owner->>Lock: withdraw()
  alt block.timestamp < unlockTime
    Lock-->>Owner: revert("Too early")
  else not owner
    Lock-->>Owner: revert("Only owner")
  else ok
    Lock->>Owner: emit Withdrawal(balance, now)
    Lock->>Owner: transfer full balance
  end
  end

Loading

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

I nudge the clock with twitchy cheer,
A vault of coins I guard so dear—
Tick, tock, hop! the time draws near;
When suns align, the path is clear.
With one swift thump, funds disappear—
Back to my burrow: safe and clear! 🐇💰

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title Check	⚠️ Warning	The pull request title suggests only documentation updates for the Lock contract, but the changes introduce core functional logic for time‐locked withdrawals, state updates, and access control rather than purely enhancing comments, making the title misleading.	Rename the title to reflect the primary change, for example “feat(Lock): implement time-locked withdrawal logic and add documentation,” or split documentation and functional changes into separate pull requests.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

✨ Finishing touches

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch doc/lock

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 5bfe7f2 and fbcc6e6.

📒 Files selected for processing (1)

• contracts/Lock.sol (2 hunks)

🔇 Additional comments (1)

contracts/Lock.sol (1)

3-37: Documentation updates improve readability

The new contract, state variable, event, and constructor comments accurately mirror the logic and make the flow much easier to follow.

Tip

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