Train Contract

Overview

The Train Contract enables secure, atomic cross-chain swaps.

Features

Secure Swaps: Trustless cross-chain transactions.
EIP-712 Signatures: Off-chain message verification.
Event-Based Tracking: Real-time updates.
Timelock & Hashlock: Ensures safe fund handling.

Functions

commit(...) - Lock funds.
lock(...) - Lock funds with a hashlock.
addLock(...) - Update an HTLC with a new hashlock and timelock.
addLockSig(...) - Add a hashlock using a signed message.
redeem(Id, secret) - Claim funds with a secret.
refund(Id) - Reclaim expired funds.

Events

TokenCommitted: Funds locked.
TokenLocked: Hashlock added.
TokenLockAdded: Additional lock applied.
TokenRedeemed: Swap completed.
TokenRefunded: Funds refunded.

Usage

Deploy with Solidity 0.8.23 and OpenZeppelin. Use Hardhat, Foundry, or Remix.

Security

Use secure hash functions (sha256).
Set appropriate timelock durations.
Sign off-chain messages with secure private keys.

License

Released under MIT License.