{"app":"Cardano API Gateway","docs":"/docs","create_address":"POST /adress/create-new","wallet_ping":"GET /wallet/ping/","balance_master":"GET /wallet/master/balance  (master from SENDER_ADDR)","balance_by_address":"POST /wallet/balance  body: {\"address\": \"addr_...\"}","balance_get":"GET /wallet/{address}/balance  (address in URL path)","fee_utxos_debug":"GET /wallet/fee/utxos  (shows ADA-only sponsor chunks)","deposit":"POST /transaction/deposit  (master -> recipient)","transfer":"POST /transaction/transfer  (user -> user USDA)","transfer_ada":"POST /transaction/transfer-ada  (user -> user ADA)","cleanup_fee_usda":"POST /transaction/cleanup-fee-account  (fee -> master USDA, no body)"}