API Endpoints:
- GET  /payment_methods: Retrieves BID and ASK sets of active payment methods (pms).
- GET  /payment_methods_stream: Streams active payment methods.
- GET  /book?send_pms=<pm,pm,...>&receive_pms=<pm,pm,...>: Retrieves a map of orderbook entries filtered by payment methods.
- GET  /book?user_id=<u64>: Retrieves a map of orderbook entries filtered by user_id (maker).
- GET  /book_stream?...: Streams orderbook entries by send/receive_pms or user_id.
- GET* /orders: Retrieves an array of orders by user_id in JWT header or cookie.
- GET  /orders?user_id=<u64>: Retrieves an array of orders by user_id.
- GET  /orders?order_ids=<uuid,uuid,...>: Retrieves an array of orders by order_id.
- GET  /orders?upm_ids=[u64,u64,...]: Retrieves an array of orders by upm_ids.
- GET* /orders_stream: Streams orders by user_id in JWT header or cookie.
- GET* /user_balance: Gets user balance by user_id/uuid in query, user_id in JWT header or cookie.
- GET* /user_balance_stream: Streams user balance by user_id in JWT header or cookie.
- GET* /blocked_users: Retrieves an array of blocked users by user_id in JWT header or cookie.
- GET* /blocked_users_stream: Streams blocked users by user_id in JWT header or cookie.
- GET  /maker_stats?user_ids=<u64,u64,...>: Retrieves a map of user details for active makers, optionally taking user_ids.

* Authentication:
Use header 'Authorization: Bearer <token>' or cookie with token. Query params precede JWT.

API Admin Endpoints:
- GET  /recent_transactions?lookback=<millis>: Retrieves an array of recent transactions, max 24h.
- GET  /recent_transactions?request_ids=<uuid,uuid,...>: Retrieves an array of recent transactions by request_id, max 24h.
- POST /place_orders: Submits one or more orders for atomic execution.
- POST /delete_orders: Removes orders by user_id, ask_upms, bid_upms or order_id's. Returns an array of orders at their last state.
- POST /activate_orders: Activates orders by user_id, ask_upms, bid_upms or order_id's. Returns an array of orders.
- POST /deactivate_orders: Deactivates orders by user_id, ask_upms, bid_upms or order_ids. Returns an array of orders.
- POST /update_order_amounts: Updates order amounts by bid_upms, ask_upms, bid_upm_ids, ask_upm_ids or order_ids. Returns an array of orders after the change.
- POST /update_user_balance: Updates user native balance by user_id. Returns balance after update.
- POST /block_users: Temporarily prevents match between two users, sort agnostic.