BuyMeaCoffee

📝The BuyMeacoffe smart contract is written in Solidity and allows users to buy ☕️ coffee in exchange for a certain amount of Ether 💰. The contract records the total number of coffees purchased, the available Ether balance and the owner's address. Users can buy coffee by sending a message and respecting a minimum cost. Upon purchase, the contract stores the coffee information in a data structure and transfers the corresponding amount to the contract owner. Once the purchase has been made, an event is issued to inform the participants. 😊

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;


contract BuyMeacoffe {

    uint public numberOfCoffees;
    uint public balance;
    address payable public owner;
    

    event BuyCoffee(
        address indexed sender,
        string message,
        uint amount,
        uint timestamp
    );

    constructor() payable {
        owner = payable(msg.sender);
    }

    struct Coffee {
        address sender;
        string message;
        uint timestamp;
        
    }

    Coffee [] coffee;

    function getCoffee() external view returns (Coffee [] memory) {
        return coffee;
    }

    function getTotalCoffee() external view returns(uint){ 
        return numberOfCoffees;
    }

    function getBalance()external view returns (uint) {
        return balance;
    }

    function buyCoffee(string memory _message) external payable {
        
        uint minimumCost = 0.001 ether;
        uint _timestamp = block.timestamp;
        uint _amount = msg.value;
        require(bytes(_message).length !=0,"The message cannot be empty");
        require(msg.value>=minimumCost, "You must send at least 0.001 ether");

        numberOfCoffees += 1;
        balance+=_amount;
        coffee.push(Coffee(msg.sender,_message,_timestamp));
 
        (bool sent,) = owner.call{value: _amount}("");
        require(sent, "Failure to send coffee");

        emit BuyCoffee(msg.sender,_message,_amount,_timestamp);

    }
  
}