trainprotocol/contracts

Train is a permissionless, trustless cross-chain bridging protocol that enables seamless asset transfers across multiple blockchain networks without relying on third parties or oracles. It introduces an improved version of HTLC (PreHTLC) that supports multi-hop transactions, allowing bridging between chains that don't have direct solver connections. The protocol is actively developed with audited implementations for EVM, Solana, Starknet, and Fuel on the main branch, while other networks like Aptos, Bitcoin, and Sui are under active development in separate branches.