Chainlink Cross-Chain Interoperability Protocol

• TokenTransfer Smart Contract

This contract contains the TokenTransfer smart contract built using Solidity and Chainlink's Cross-Chain Interoperability Protocol (CCIP). The contract allows transferring tokens across multiple blockchains using Chainlink's router.

Features

• Cross-Chain Token Transfer: Transfer ERC20 tokens across different blockchains using Chainlink's CCIP.
• Fee Payment Options: Supports paying fees with LINK tokens or native chain currency.
• Allowlisted Chains: Only transfers to specified allowlisted chains are allowed.
• Receiver Validation: Ensures the receiver address is valid before executing a transfer.
• Owner Access Control: The contract owner can manage allowlisted chains and execute transfers.

Installation

To use or develop this project, follow these steps:

1. Clone the repository:

   git clone https://github.com/anurag-iitk/chainlink-ccip.git
   cd chainlink-ccip

2. Install Foundry:

   Foundry is a blazing fast, portable, and modular toolkit for Ethereum application development written in Rust. If you don't have Foundry installed, you can install it here.

   curl -L https://foundry.paradigm.xyz | bash
   foundryup

3. Install Dependencies:

   forge install

4. Compile Contracts:

   forge build

5. Run Tests:

   forge test

6. Deploy

    forge script script/TokenTransfer.s.sol --rpc-url <your_rpc_url> --private-key 
    <your_private_key>

Usage

1. Deploy Contract: Deploy the contract to the desired blockchain network using your preferred method (Remix, Hardhat, etc.).

2. Add Allowlisted Chains: Use the allowlistDestinationChain function to specify the chains to which tokens can be transferred.

3. Transfer Tokens:

   • Use transferTokensPayLINK for transfers paying fees in LINK tokens.
   • Use transferTokensPayNative for transfers paying fees in the native chain currency.

4. Withdraw: Withdraw any remaining tokens or ETH in the contract using the withdraw or withdrawToken functions.

Acknowledgments

• Chainlink
• Foundry
• OpenZeppelin

For more information, visit the project repository.

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