🏦 SimpleBank Solidity Task

Welcome to the SimpleBank smart contract challenge! This is a beginner-friendly Solidity assignment meant to help you practice writing and understanding a smart contract with state variables, mappings, and ether transfers.

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📄 Overview

You’ve been given a Solidity contract file SimpleBank.sol that has some blanks (marked with // TODO: ____). Your job is to:

• Fill in the missing parts of the contract.
• Make sure it compiles and deploys correctly on Remix IDE.
• Push your completed code to your GitHub fork and raise a PR.

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🧑‍💻 Task Checklist

1. Create a fork of this repository

   Go to the top-right of this repo page and click the Fork button. This will create your own copy of the repo.

2. Clone your fork locally

   Open your terminal and run the following:

   git clone https://github.com/YOUR_USERNAME/SimpleBank.git
   cd SimpleBank

3. Create a new branch with your name

   Replace your_name with your actual name:

   git checkout -b your_name

4. Fill in the blanks in the smart contract

   Open SimpleBank.sol in your favorite editor. You will see lines like:

   // TODO: Declare a public variable 'owner' of type address
   address public ____;

   Replace the ____ with the correct code. Repeat this for all TODOs.

5. Test the smart contract in Remix IDE

   • Go to https://remix.ethereum.org
   • Create a new file called SimpleBank.sol
   • Paste your modified contract code into it
   • Compile it (select Solidity compiler 0.8.x)
   • Deploy and test all functions:
     • Deposit ether
     • Withdraw ether
     • View balances
     • Call contractBalance() as the owner

   ✅ Once everything works correctly, continue.

6. Push your branch to GitHub

   git add .
   git commit -m "Filled blanks in SimpleBank by your_name"
   git push origin your_name

7. Create a Pull Request

   • Go to your forked repository on GitHub
   • Click "Compare & pull request"
   • Set:
     • Base repository = original repository you forked from
     • Base branch = main
     • Compare branch = your branch (your_name)
   • Title the PR as your name (e.g., Ayesha or Rohan Singh)
   • Submit the PR

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✏️ Sample Replacements

If you're unsure how to fill the blanks, here’s a small example:

address public owner;
mapping(address => uint) public balances;
require(msg.sender == owner, "Not the owner");
balances[msg.sender] += msg.value;
return balances[msg.sender];

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📚 Helpful Resources

• Solidity Official Docs
• Remix IDE
• Learn Solidity by Example

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🏁 Submission Format

• A pull request from a branch with your name
• Contract should be tested and working on Remix
• Your name must be the title of the PR

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Good luck and have fun learning Solidity! 🚀💻