Advanced features

The SDK supports advanced features that may be useful in specific use cases:

• Custom configuration enables fine-tuning the SDK behavior with various configuration options
• SOCKS5 proxy sends the connections the SDK opens through a SOCKS5 proxy, such as a local Tor daemon
• Custom leaf optimization allows defining the leaf optimization policy and controlling when it occurs in order to minimize payment latency
• Conditional payments are useful for implementing atomic cross-chain swaps
• Using an External Signer provides custom signing logic and enables integrating with hardware wallets, MPC protocols, or existing wallet infrastructure
• Managing webhooks delivers real-time notifications of wallet events, such as completed payments or on-chain deposits, to a URL you register
• Unilateral exit moves funds onto the Bitcoin blockchain without the Spark operators, as a safety net

If you're running the SDK on a server, see Running on a server.