action=initiate to initiate the swap on the source chain. The create order endpoint returns chain-specific signing data — sign it and submit here. The relayer broadcasts the transaction on the user’s behalf, making the process gasless.
typed_data with EIP-712 domain and message fields. Sign this using eth_signTypedData_v4.Supported on all EVM chains (Ethereum, Arbitrum, Base, etc.) and Tron.The HTLC action to execute on the order.
initiate, redeem, refund, instant-refund Initiate the swap on the source chain. The request body is chain-specific — refer to the Initiate section above for EVM, Solana, and Starknet request formats.