withdrawal-timer

This smart contract is a safe where you can put your ETH, and if something happens to you, someone you allowed (allowedAddress) will be able to withdraw the ETH after a certain amount of time.

1. The owner deploys the contract with a certain amount of ETH

2. The allowed address (or the owner) requests a withdraw

The requester choose the amount to withdraw and need to pay 0.1ETH to prevent spam request.

3. Once the timer for this request his over

The allowed address (or the owner) can withdraw the amount knowing the request id.

At any time, the owner can:

• cancel a withdraw request.
• change the timer (will be effective only for new requests).
• change the allowed address.

Feedback received

• You should always work with ETH in units of Wei(the conversion from Eth to Wei can be made from the front-end)
• I see a few way to reduce gas too (like uint -> uint8 or uint64)
• public functions could be external too
• There is an argument for allowing the existing allowed address to change the allowed address
• There's also an argument that the owner should be able to withdraw immediately
• the allowed address could be an argument inside the constructor instead of being hardcoded
• You could use the Ownable lib from Open Zeppelin instead of having your own stuff