I’m ready to wrap up the next milestone of my app by completing the payment feature. The focus is clear: • Finish the Payment Integration module with Cryptocurrency support. • Connect to a reputable crypto gateway or direct wallet API so users can pay seamlessly. • Handle transaction creation, confirmation callbacks, and error states. • Implement secure key storage and basic fraud-prevention checks. • Provide environment-specific configs (testnet and mainnet) along with concise setup docs. I’ll review the work against functional tests that prove a user can initiate, confirm, and see their crypto payment reflected in the app’s order status screen. If you have recent experience integrating Bitcoin, Ethereum, or similar coins using common libraries or SDKs, let’s get this milestone shipped.