import logging import threading from datetime import date, datetime from ipaddress import IPv4Address from typing import Any, Callable, Dict from arrow import Arrow from flask import Flask, jsonify, request from flask.json import JSONEncoder from flask_cors import CORS from flask_jwt_extended import (JWTManager, create_access_token, create_refresh_token, get_jwt_identity, jwt_refresh_token_required, verify_jwt_in_request_optional) from werkzeug.security import safe_str_cmp from werkzeug.serving import make_server from freqtrade.__init__ import __version__ from freqtrade.constants import DATETIME_PRINT_FORMAT from freqtrade.rpc.rpc import RPC, RPCException from freqtrade.rpc.fiat_convert import CryptoToFiatConverter logger = logging.getLogger(__name__) BASE_URI = "/api/v1" class ArrowJSONEncoder(JSONEncoder): def default(self, obj): try: if isinstance(obj, Arrow): return obj.for_json() elif isinstance(obj, date): return obj.strftime("%Y-%m-%d") elif isinstance(obj, datetime): return obj.strftime(DATETIME_PRINT_FORMAT) iterable = iter(obj) except TypeError: pass else: return list(iterable) return JSONEncoder.default(self, obj) # Type should really be Callable[[ApiServer, Any], Any], but that will create a circular dependency def require_login(func: Callable[[Any, Any], Any]): def func_wrapper(obj, *args, **kwargs): verify_jwt_in_request_optional() auth = request.authorization if get_jwt_identity() or auth and obj.check_auth(auth.username, auth.password): return func(obj, *args, **kwargs) else: return jsonify({"error": "Unauthorized"}), 401 return func_wrapper # Type should really be Callable[[ApiServer], Any], but that will create a circular dependency def rpc_catch_errors(func: Callable[..., Any]): def func_wrapper(obj, *args, **kwargs): try: return func(obj, *args, **kwargs) except RPCException as e: logger.exception("API Error calling %s: %s", func.__name__, e) return obj.rest_error(f"Error querying {func.__name__}: {e}") return func_wrapper class ApiServer(RPC): """ This class runs api server and provides rpc.rpc functionality to it This class starts a non-blocking thread the api server runs within """ def check_auth(self, username, password): return (safe_str_cmp(username, self._config['api_server'].get('username')) and safe_str_cmp(password, self._config['api_server'].get('password'))) def __init__(self, freqtrade) -> None: """ Init the api server, and init the super class RPC :param freqtrade: Instance of a freqtrade bot :return: None """ super().__init__(freqtrade) self._config = freqtrade.config self.app = Flask(__name__) self._cors = CORS(self.app, resources={r"/api/*": { "supports_credentials": True, "origins": self._config['api_server'].get('CORS_origins', [])}} ) # Setup the Flask-JWT-Extended extension self.app.config['JWT_SECRET_KEY'] = self._config['api_server'].get( 'jwt_secret_key', 'super-secret') self.jwt = JWTManager(self.app) self.app.json_encoder = ArrowJSONEncoder # Register application handling self.register_rest_rpc_urls() if self._config.get('fiat_display_currency', None): self._fiat_converter = CryptoToFiatConverter() thread = threading.Thread(target=self.run, daemon=True) thread.start() def cleanup(self) -> None: logger.info("Stopping API Server") self.srv.shutdown() def run(self): """ Method that runs flask app in its own thread forever. Section to handle configuration and running of the Rest server also to check and warn if not bound to a loopback, warn on security risk. """ rest_ip = self._config['api_server']['listen_ip_address'] rest_port = self._config['api_server']['listen_port'] logger.info(f'Starting HTTP Server at {rest_ip}:{rest_port}') if not IPv4Address(rest_ip).is_loopback: logger.warning("SECURITY WARNING - Local Rest Server listening to external connections") logger.warning("SECURITY WARNING - This is insecure please set to your loopback," "e.g 127.0.0.1 in config.json") if not self._config['api_server'].get('password'): logger.warning("SECURITY WARNING - No password for local REST Server defined. " "Please make sure that this is intentional!") # Run the Server logger.info('Starting Local Rest Server.') try: self.srv = make_server(rest_ip, rest_port, self.app) self.srv.serve_forever() except Exception: logger.exception("Api server failed to start.") logger.info('Local Rest Server started.') def send_msg(self, msg: Dict[str, str]) -> None: """ We don't push to endpoints at the moment. Take a look at webhooks for that functionality. """ pass def rest_dump(self, return_value): """ Helper function to jsonify object for a webserver """ return jsonify(return_value) def rest_error(self, error_msg): return jsonify({"error": error_msg}), 502 def register_rest_rpc_urls(self): """ Registers flask app URLs that are calls to functonality in rpc.rpc. First two arguments passed are /URL and 'Label' Label can be used as a shortcut when refactoring :return: """ self.app.register_error_handler(404, self.page_not_found) # Actions to control the bot self.app.add_url_rule(f'{BASE_URI}/token/login', 'login', view_func=self._token_login, methods=['POST']) self.app.add_url_rule(f'{BASE_URI}/token/refresh', 'token_refresh', view_func=self._token_refresh, methods=['POST']) self.app.add_url_rule(f'{BASE_URI}/start', 'start', view_func=self._start, methods=['POST']) self.app.add_url_rule(f'{BASE_URI}/stop', 'stop', view_func=self._stop, methods=['POST']) self.app.add_url_rule(f'{BASE_URI}/stopbuy', 'stopbuy', view_func=self._stopbuy, methods=['POST']) self.app.add_url_rule(f'{BASE_URI}/reload_config', 'reload_config', view_func=self._reload_config, methods=['POST']) # Info commands self.app.add_url_rule(f'{BASE_URI}/balance', 'balance', view_func=self._balance, methods=['GET']) self.app.add_url_rule(f'{BASE_URI}/count', 'count', view_func=self._count, methods=['GET']) self.app.add_url_rule(f'{BASE_URI}/daily', 'daily', view_func=self._daily, methods=['GET']) self.app.add_url_rule(f'{BASE_URI}/edge', 'edge', view_func=self._edge, methods=['GET']) self.app.add_url_rule(f'{BASE_URI}/profit', 'profit', view_func=self._profit, methods=['GET']) self.app.add_url_rule(f'{BASE_URI}/performance', 'performance', view_func=self._performance, methods=['GET']) self.app.add_url_rule(f'{BASE_URI}/status', 'status', view_func=self._status, methods=['GET']) self.app.add_url_rule(f'{BASE_URI}/version', 'version', view_func=self._version, methods=['GET']) self.app.add_url_rule(f'{BASE_URI}/show_config', 'show_config', view_func=self._show_config, methods=['GET']) self.app.add_url_rule(f'{BASE_URI}/ping', 'ping', view_func=self._ping, methods=['GET']) self.app.add_url_rule(f'{BASE_URI}/trades', 'trades', view_func=self._trades, methods=['GET']) self.app.add_url_rule(f'{BASE_URI}/trades/', 'trades_delete', view_func=self._trades_delete, methods=['DELETE']) # Combined actions and infos self.app.add_url_rule(f'{BASE_URI}/blacklist', 'blacklist', view_func=self._blacklist, methods=['GET', 'POST']) self.app.add_url_rule(f'{BASE_URI}/whitelist', 'whitelist', view_func=self._whitelist, methods=['GET']) self.app.add_url_rule(f'{BASE_URI}/forcebuy', 'forcebuy', view_func=self._forcebuy, methods=['POST']) self.app.add_url_rule(f'{BASE_URI}/forcesell', 'forcesell', view_func=self._forcesell, methods=['POST']) # TODO: Implement the following # help (?) @require_login def page_not_found(self, error): """ Return "404 not found", 404. """ return self.rest_dump({ 'status': 'error', 'reason': f"There's no API call for {request.base_url}.", 'code': 404 }), 404 @require_login @rpc_catch_errors def _token_login(self): """ Handler for /token/login Returns a JWT token """ auth = request.authorization if auth and self.check_auth(auth.username, auth.password): keystuff = {'u': auth.username} ret = { 'access_token': create_access_token(identity=keystuff), 'refresh_token': create_refresh_token(identity=keystuff), } return self.rest_dump(ret) return jsonify({"error": "Unauthorized"}), 401 @jwt_refresh_token_required @rpc_catch_errors def _token_refresh(self): """ Handler for /token/refresh Returns a JWT token based on a JWT refresh token """ current_user = get_jwt_identity() new_token = create_access_token(identity=current_user, fresh=False) ret = {'access_token': new_token} return self.rest_dump(ret) @require_login @rpc_catch_errors def _start(self): """ Handler for /start. Starts TradeThread in bot if stopped. """ msg = self._rpc_start() return self.rest_dump(msg) @require_login @rpc_catch_errors def _stop(self): """ Handler for /stop. Stops TradeThread in bot if running """ msg = self._rpc_stop() return self.rest_dump(msg) @require_login @rpc_catch_errors def _stopbuy(self): """ Handler for /stopbuy. Sets max_open_trades to 0 and gracefully sells all open trades """ msg = self._rpc_stopbuy() return self.rest_dump(msg) @rpc_catch_errors def _ping(self): """ simple poing version """ return self.rest_dump({"status": "pong"}) @require_login @rpc_catch_errors def _version(self): """ Prints the bot's version """ return self.rest_dump({"version": __version__}) @require_login @rpc_catch_errors def _show_config(self): """ Prints the bot's version """ return self.rest_dump(self._rpc_show_config()) @require_login @rpc_catch_errors def _reload_config(self): """ Handler for /reload_config. Triggers a config file reload """ msg = self._rpc_reload_config() return self.rest_dump(msg) @require_login @rpc_catch_errors def _count(self): """ Handler for /count. Returns the number of trades running """ msg = self._rpc_count() return self.rest_dump(msg) @require_login @rpc_catch_errors def _daily(self): """ Returns the last X days trading stats summary. :return: stats """ timescale = request.args.get('timescale', 7) timescale = int(timescale) stats = self._rpc_daily_profit(timescale, self._config['stake_currency'], self._config.get('fiat_display_currency', '') ) return self.rest_dump(stats) @require_login @rpc_catch_errors def _edge(self): """ Returns information related to Edge. :return: edge stats """ stats = self._rpc_edge() return self.rest_dump(stats) @require_login @rpc_catch_errors def _profit(self): """ Handler for /profit. Returns a cumulative profit statistics :return: stats """ stats = self._rpc_trade_statistics(self._config['stake_currency'], self._config.get('fiat_display_currency') ) return self.rest_dump(stats) @require_login @rpc_catch_errors def _performance(self): """ Handler for /performance. Returns a cumulative performance statistics :return: stats """ stats = self._rpc_performance() return self.rest_dump(stats) @require_login @rpc_catch_errors def _status(self): """ Handler for /status. Returns the current status of the trades in json format """ try: results = self._rpc_trade_status() return self.rest_dump(results) except RPCException: return self.rest_dump([]) @require_login @rpc_catch_errors def _balance(self): """ Handler for /balance. Returns the current status of the trades in json format """ results = self._rpc_balance(self._config['stake_currency'], self._config.get('fiat_display_currency', '')) return self.rest_dump(results) @require_login @rpc_catch_errors def _trades(self): """ Handler for /trades. Returns the X last trades in json format """ limit = int(request.args.get('limit', 0)) results = self._rpc_trade_history(limit) return self.rest_dump(results) @require_login @rpc_catch_errors def _trades_delete(self, tradeid): """ Handler for DELETE /trades/ endpoint. Removes the trade from the database (tries to cancel open orders first!) get: param: tradeid: Numeric trade-id assigned to the trade. """ result = self._rpc_delete(tradeid) return self.rest_dump(result) @require_login @rpc_catch_errors def _whitelist(self): """ Handler for /whitelist. """ results = self._rpc_whitelist() return self.rest_dump(results) @require_login @rpc_catch_errors def _blacklist(self): """ Handler for /blacklist. """ add = request.json.get("blacklist", None) if request.method == 'POST' else None results = self._rpc_blacklist(add) return self.rest_dump(results) @require_login @rpc_catch_errors def _forcebuy(self): """ Handler for /forcebuy. """ asset = request.json.get("pair") price = request.json.get("price", None) trade = self._rpc_forcebuy(asset, price) if trade: return self.rest_dump(trade.to_json()) else: return self.rest_dump({"status": f"Error buying pair {asset}."}) @require_login @rpc_catch_errors def _forcesell(self): """ Handler for /forcesell. """ tradeid = request.json.get("tradeid") results = self._rpc_forcesell(tradeid) return self.rest_dump(results)