Time-Unlocked ERC20 Vesting Contract

This project implements a smart contract for time-based vesting of ERC20 tokens. It allows a payer to deposit tokens into the contract, which are then gradually unlocked for withdrawal by a designated receiver over a specified period.

Features

• Single payer deposits ERC20 tokens
• Tokens are unlocked linearly over a specified number of days
• Receiver can withdraw unlocked tokens daily
• Immutable vesting schedule once deposit is made
• Prevents over-withdrawal of tokens

Getting Started

Prerequisites

• Solidity 0.8.25
• OpenZeppelin Contracts library
• Foundry

Installation

1. Clone the repository:

   git clone https://github.com/yourusername/erc20-vesting-contract.git
   

2. Install dependencies:

   forge build
   

Usage

1. Deploy the VestingContract to your chosen network.
2. Call the deposit function as the payer to initiate the vesting schedule.
3. The receiver can call withdraw function to claim unlocked tokens.

Testing

Run the test suite:

forge test

Security Considerations

• The contract has been designed with security best practices in mind.
• Follow CEI (Checks-Effects-Interactions) pattern to prevent reentrancy.
• Careful consideration has been given to prevent precision loss in calculations.
• Proper checks are implemented for amounts and time-based conditions.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Disclaimer

This smart contract is provided as-is. Users should conduct their own security audit before using it in a production environment.

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