Staker Smart Contract

This repository contains a Solidity smart contract called Staker. The Staker contract allows users to stake Ether and trigger an external contract's function once a specified threshold is reached. The contract also includes a deadline, after which users can withdraw their stake if the threshold has not been met.

Features

• Stake Ether and track individual balances
• Set a threshold and deadline for triggering the external contract
• Execute the external contract's function if the deadline has passed and the threshold is met
• Withdraw the user's balance if the deadline has passed and the threshold has not been met
• Calculate the time left before the deadline

Usage

1. Deploy the ExampleExternalContract and note its address.
2. Deploy the Staker contract, passing the address of the ExampleExternalContract as a constructor argument.
3. Users can stake Ether by calling the stake() function or sending Ether directly to the contract.
4. After the deadline has passed, if the threshold is met, anyone can call the execute() function to trigger the external contract's function.
5. If the deadline has passed and the threshold has not been met, users can call the withdraw() function to retrieve their staked Ether.

Example

// Deploy the ExampleExternalContract
ExampleExternalContract exampleExternalContract = new ExampleExternalContract();

// Deploy the Staker contract with the address of the ExampleExternalContract
Staker staker = new Staker(address(exampleExternalContract));

// Stake Ether
staker.stake{value: 1 ether}();

// Execute the external contract's function after the deadline and if the threshold is met
staker.execute();

// Withdraw Ether if the deadline has passed and the threshold has not been met
staker.withdraw();