Receiving Ether in Blockchain / Solidity - Mini Project: Build & Apply

Receiving Ether

📖 Scenario: You want to create a simple smart contract on the Ethereum blockchain that can receive Ether payments. This contract will hold the Ether sent to it and allow you to check its balance.

🎯 Goal: Build a Solidity smart contract that can receive Ether and keep track of the total Ether it has received.

📋 What You'll Learn

Create a contract named ReceiveEther

Add a receive function to accept Ether

Add a public function getBalance that returns the contract's Ether balance

💡 Why This Matters

🌍 Real World

Smart contracts often need to accept payments or donations in Ether. This project shows the simplest way to do that.

💼 Career

Understanding how to receive and manage Ether is essential for blockchain developers working on decentralized finance (DeFi) or payment systems.

1

Create the contract skeleton

Write a Solidity contract named ReceiveEther with the correct version pragma pragma solidity ^0.8.0;.

Blockchain / Solidity

pragma solidity ^0.8.0;

// Create contract ReceiveEther
contract ReceiveEther {
    
    // Your code here
}

Need a hint?

Start by declaring the Solidity version and the contract name.

2

Add the receive function

Inside the ReceiveEther contract, add a receive external payable function to accept Ether transfers.

Blockchain / Solidity

pragma solidity ^0.8.0;

contract ReceiveEther {
    
    // Add receive function to accept Ether
    receive() external payable {
        // Your code here
    }
}

Need a hint?

The receive function has no name and no arguments. It must be marked external and payable.

3

Add a function to get contract balance

Add a public view function named getBalance that returns the contract's current Ether balance as uint.

Blockchain / Solidity

pragma solidity ^0.8.0;

contract ReceiveEther {
    receive() external payable {
        // This function is intentionally left blank to accept Ether
    }

    // Add getBalance function to return contract balance
    function getBalance() public view returns (uint) {
        // Your code here
    }
}

Need a hint?

Use address(this).balance to get the contract's Ether balance.

4

Test the contract output

Write a comment showing how to call getBalance() to check the contract's Ether balance.

Blockchain / Solidity

pragma solidity ^0.8.0;

contract ReceiveEther {
    receive() external payable {
        // This function is intentionally left blank to accept Ether
    }

    function getBalance() public view returns (uint) {
        return address(this).balance;
    }
}

// Call getBalance() to see the contract's Ether balance
// Your code here

Need a hint?

Show a comment with example code calling getBalance().