Saving Vault

# 💸 SavingsVault – A Simple ETH Savings Vault on Flow

Network: Flow Testnet

Contract Address: 0xFe2D59D9F92A3959a44e9E5F5f1612b2BA697922](https://testnet.flowscan.org/account/0xFe2D59D9F92A3959a44e9E5F5f1612b2BA697922)

Language: Solidity ^0.8.20 (EVM-compatible)

License: MIT

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## 📘 Project Overview

SavingsVault is a decentralized vault contract designed to let users securely deposit and withdraw ETH without any complex setup or external dependencies.

This project demonstrates a minimalistic vault architecture that prioritizes simplicity, transparency, and user control over funds.

Built on Flow’s EVM-compatible environment, the vault provides a simple user flow:

- Deposit ETH directly or through a function call.

- Withdraw your full vault balance at any time.

- View your personal and total vault balances securely.

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## 🔗 Deployed Contract(s)

| Environment | Network | Contract Address | Description |

|--------------|----------|------------------|-------------|

| Testnet | Flow Testnet | 0xFe2D59D9F92A3959a44e9E5F5f1612b2BA697922](https://testnet.flowscan.org/account/0xFe2D59D9F92A3959a44e9E5F5f1612b2BA697922) | Main SavingsVault contract (ETH vault) |

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## ⚙️ Key Features

- 🔐 Self-custodial vault – each user controls their own funds

- 💰 Deposit and withdraw ETH (no input parameters)

- 🧱 No constructors / no imports – fully standalone Solidity contract

- 🧾 Emits events for all deposits and withdrawals

- 🚫 Reentrancy protection for secure withdrawals

- 🌍 Tested and deployed on Flow Testnet

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## 🧩 Core Functions

| Function | Description |

|-----------|-------------|

| deposit() | Deposit ETH into your personal vault balance. |

| withdrawAll() | Withdraw your entire saved balance in one transaction. |

| getMyBalance() | View your saved balance in wei. |

| totalVaultBalance() | Check total ETH held by the contract. |

| renounceOwnership() | Owner can remove themselves (optional). |

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## 🧠 Technical Details

- Solidity Version: ^0.8.20

- Dependencies: None (no imports)

- Constructor: None (owner initialized inline)

- Reentrancy Protection: Implemented via locked state variable

- Pattern Used: Checks-Effects-Interactions

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## 🧾 Events

| Event | Parameters | Description |

|--------|-------------|-------------|

| Deposit(address indexed user, uint256 amount) | user, amount | Emitted when a user deposits ETH. |

| Withdraw(address indexed user, uint256 amount) | user, amount | Emitted when a user withdraws ETH. |

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## 🚀 Quick Start (Testnet)

1. Connect to Flow Testnet.

2. Fund your wallet with testnet FLOW/ETH (depending on environment).

3. Interact with the contract using:

- Remix IDE

- Flow CLI

- Flow Playground (EVM mode)

### Example (via Remix)

```solidity

// Deposit 1 ETH

SavingsVault.deposit{value: 1 ether}();

// Withdraw all funds

SavingsVault.withdrawAll();

// Check your vault balance

SavingsVault.getMyBalance();