Foundry Merkle Airdrop

Overview

The Foundry Merkle Airdrop project is designed to distribute ERC-20 tokens efficiently and securely using Merkle tree proofs. This ensures that only eligible addresses can claim their tokens and prevents duplicate claims.

Features

• Merkle Tree Proofs: Efficient verification of eligible claims.
• Secure Claims: Ensures each address can only claim once.
• EIP-712 Integration: Utilizes EIP-712 for structured data hashing and signing.

Contract Details

MerkleAirdrop.sol

The core contract of the project is MerkleAirdrop.sol, which handles the airdrop functionality. Key components include:

• Constructor: Initializes the contract with the Merkle root and the ERC-20 token to be airdropped.
• createLeaf: Creates a Merkle tree leaf from an address and amount.
• claim: Allows an eligible address to claim their tokens if they provide a valid Merkle proof and signature.
• getMessageHash: Returns the hash of the claim message.
• getAirDropToken: Returns the token being airdropped.
• getMerkleRoot: Returns the Merkle root used for the airdrop.
• _isValidSignature: Validates the signature of the claim.

Errors

• MerkleAridrop__InvalidProof: Thrown when an invalid Merkle proof is provided.
• MerkleAridrop__AlreadyClaimed: Thrown when an address tries to claim tokens more than once.
• MerkleAirdrop__InvalidSignature: Thrown when an invalid signature is provided.

Events

• Claim: Emitted when a successful claim is made.

Setup and Installation

1. Clone the Repository:

   git clone https://github.com/your-username/foundry-merkle-airdrop.git
   cd foundry-merkle-airdrop

2. Install Foundry: Follow the instructions to install Foundry from the official Foundry repository.

3. Build the Project:

   forge build

Testing

To run the tests, use the following command:

forge test