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https://github.com/sarahm44/solidity-joint-account

Solidity smart contract that accepts two user addresses for a joint savings account.
https://github.com/sarahm44/solidity-joint-account

ethereum ethereum-blockchain ethereum-contract fintech solidity solidity-contracts solidity-language

Last synced: 19 days ago
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Solidity smart contract that accepts two user addresses for a joint savings account.

Host: GitHub
URL: https://github.com/sarahm44/solidity-joint-account
Owner: sarahm44
Created: 2022-08-10T10:22:19.000Z (over 2 years ago)
Default Branch: main
Last Pushed: 2022-08-10T11:45:30.000Z (over 2 years ago)
Last Synced: 2025-01-26T05:18:42.609Z (20 days ago)
Topics: ethereum, ethereum-blockchain, ethereum-contract, fintech, solidity, solidity-contracts, solidity-language
Language: Solidity
Homepage:
Size: 2.39 MB
Stars: 0
Watchers: 2
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md

Awesome Lists containing this project

README

        # Solidity Smart Contract - Joint Savings Account

![](images/20-5-challenge-image.png)

## Table of Contents

- [Table of Contents](#table-of-contents)

- [Overview](#overview)

  * [Relevant Files](#relevant-files)

- [Steps Completed](#steps-completed)

  * [1. Create a Joint Savings Account Contract in Solidity](#1-create-a-joint-savings-account-contract-in-solidity)

  * [2. Compile and Deploy Contract in the JavaScript VM](#2-compile-and-deploy-contract-in-the-javascript-vm)

  * [3. Interact with Deployed Smart Contract](#3-interact-with-deployed-smart-contract)

- [Tech Stack](#tech-stack)

## Overview

I created a Solidity smart contract that accepts two user addresses, to automate the creation of joint savings accounts. These two addresses will be able to control a joint savings account. 

The smart contract uses ether management functions to implement a financial institution’s requirements for providing the features of the joint savings account. These features will consist of the ability to deposit and withdraw funds from the account.

### Relevant Files

See the file [joint_savings.sol](joint_savings.sol) containing the smart contract.

The folder ['execution_results'](execution_results) contains images confirming the deposit and withdrawal transactions designed to test the `JointSavings` functionality in the Remix VM (London) worked as expected.

## Steps Completed

The steps I completed are as follows:

1. Created a joint savings account contract in Solidity

2. Compiled and deployed the contract in the Remix VM (London) 

3. Interacted with the deployed smart contract

### 1. Create a Joint Savings Account Contract in Solidity

I created the smart contract for a joint savings account in Solidity. See part of the contract in the image below:

![](images/contract.png)

The full contract can be found in [joint_savings.sol](joint_savings.sol).

### 2. Compile and Deploy Contract in the JavaScript VM

I compiled the smart contract as shown below:

![](images/compile_and_run.png)

I then deployed the contract, as shown below:

![](images/deploy.png)

### 3. Interact with Deployed Smart Contract

Once the contract was deployed, I tested its functionality.

#### Use 'setAccounts' Function

I used the `setAccounts` function to define the authorized Ethereum addresses that will be able to withdraw funds from the contract:

![](execution_results/set_accounts.png)

#### Test Deposit Functionality

I tested the deposit functionality of the smart contract by sending the following amounts of ether. After each transaction, I used the `contractBalance` function to verify that the funds were added to the contract.

##### Transaction 1: Send 1 ether as wei.

![](execution_results/1_ether.png)

![](execution_results/1_ether_balance.png)

##### Transaction 2: Send 10 ether as wei.

![](execution_results/10_ether.png)

![](execution_results/10_ether_balance.png)

##### Transaction 3: Send 5 ether.

![](execution_results/5_ether.png)

![](execution_results/5_ether_balance.png)

I used the website [Ethereum Unit Converter](https://eth-converter.com/) to assist doing the conversions of ether to wei.

#### Test Withdrawal Functionality

Once I'd successfully deposited funds into the contract, I tested the contract’s withdrawal functionality. 

##### Withdraw 5 ether into `accountOne`

![](execution_results/5_ether_withdraw.png)

![](execution_results/5_ether_withdraw_bal.png)

##### Withdraw 10 ether into `accountTwo`

![](execution_results/10_ether_withdraw.png)

![](execution_results/5_ether_withdraw_bal.png)

##### Use the `lastToWithdraw` and `lastWithdrawAmount` functions to verify that the address and amount were correct

![](execution_results/last_to_withdraw.png)

![](execution_results/last_withdraw_amount.png)

## Tech Stack

Tech used includes:

* [Remix IDE](https://remix.ethereum.org/)

* [Ethereum Unit Converter](https://eth-converter.com/)