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Merge pull request #640 from xmatthias/ccxt-obj-slippage 

[cxxt][2/2] Add columns for slippage detection
This commit is contained in:
Michael Egger 2018-05-12 13:56:15 +02:00 committed by GitHub
parent 01b6a0eb53 58425993da
commit edd840ac35
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4 changed files with 165 additions and 5 deletions
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13
docs/sql_cheatsheet.md
View File

@ -32,9 +32,12 @@ CREATE TABLE trades (
exchange VARCHAR NOT NULL,
pair VARCHAR NOT NULL,
is_open BOOLEAN NOT NULL,
fee FLOAT NOT NULL,
fee_open FLOAT NOT NULL,
fee_close FLOAT NOT NULL,
open_rate FLOAT,
open_rate_requested FLOAT,
close_rate FLOAT,
close_rate_requested FLOAT,
close_profit FLOAT,
stake_amount FLOAT NOT NULL,
amount FLOAT,
@ -71,13 +74,13 @@ WHERE id=31;
```sql
INSERT
INTO trades (exchange, pair, is_open, fee, open_rate, stake_amount, amount, open_date)
VALUES ('BITTREX', 'BTC_<COIN>', 1, 0.0025, <open_rate>, <stake_amount>, <amount>, '<datetime>')
INTO trades (exchange, pair, is_open, fee_open, fee_close, open_rate, stake_amount, amount, open_date)
VALUES ('BITTREX', 'BTC_<COIN>', 1, 0.0025, 0.0025, <open_rate>, <stake_amount>, <amount>, '<datetime>')
```
**Example:**
```sql
INSERT INTO trades (exchange, pair, is_open, fee, open_rate, stake_amount, amount, open_date) VALUES ('BITTREX', 'BTC_ETC', 1, 0.0025, 0.00258580, 0.002, 0.7715262081, '2017-11-28 12:44:24.000000')
INSERT INTO trades (exchange, pair, is_open, fee_open, fee_close, open_rate, stake_amount, amount, open_date) VALUES ('BITTREX', 'BTC_ETC', 1, 0.0025, 0.0025, 0.00258580, 0.002, 0.7715262081, '2017-11-28 12:44:24.000000')
```
## Fix wrong fees in the table
@ -87,4 +90,4 @@ If your DB was created before
```sql
UPDATE trades SET fee=0.0025 WHERE fee=0.005;
```
```

2
freqtrade/freqtradebot.py
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@ -330,6 +330,7 @@ class FreqtradeBot(object):
fee_open=fee,
fee_close=fee,
open_rate=buy_limit,
open_rate_requested=buy_limit,
open_date=datetime.utcnow(),
exchange=exchange.get_id(),
open_order_id=order_id
@ -538,6 +539,7 @@ class FreqtradeBot(object):
# Execute sell and update trade record
order_id = exchange.sell(str(trade.pair), limit, trade.amount)['id']
trade.open_order_id = order_id
trade.close_rate_requested = limit
fmt_exp_profit = round(trade.calc_profit_percent(rate=limit) * 100, 2)
profit_trade = trade.calc_profit(rate=limit)

53
freqtrade/persistence.py
View File

@ -15,6 +15,8 @@ from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm.scoping import scoped_session
from sqlalchemy.orm.session import sessionmaker
from sqlalchemy.pool import StaticPool
from sqlalchemy import inspect
logger = logging.getLogger(__name__)
@ -50,12 +52,61 @@ def init(config: dict, engine: Optional[Engine] = None) -> None:
Trade.session = session()
Trade.query = session.query_property()
_DECL_BASE.metadata.create_all(engine)
check_migrate(engine)
# Clean dry_run DB
if _CONF.get('dry_run', False) and _CONF.get('dry_run_db', False):
clean_dry_run_db()
def has_column(columns, searchname: str) -> bool:
return len(list(filter(lambda x: x["name"] == searchname, columns))) == 1
def check_migrate(engine) -> None:
"""
Checks if migration is necessary and migrates if necessary
"""
inspector = inspect(engine)
cols = inspector.get_columns('trades')
if not has_column(cols, 'fee_open'):
# Schema migration necessary
engine.execute("alter table trades rename to trades_bak")
# let SQLAlchemy create the schema as required
_DECL_BASE.metadata.create_all(engine)
# Copy data back - following the correct schema
engine.execute("""insert into trades
(id, exchange, pair, is_open, fee_open, fee_close, open_rate,
open_rate_requested, close_rate, close_rate_requested, close_profit,
stake_amount, amount, open_date, close_date, open_order_id)
select id, lower(exchange),
case
when instr(pair, '_') != 0 then
substr(pair, instr(pair, '_') + 1) || '/' ||
substr(pair, 1, instr(pair, '_') - 1)
else pair
end
pair,
is_open, fee fee_open, fee fee_close,
open_rate, null open_rate_requested, close_rate,
null close_rate_requested, close_profit,
stake_amount, amount, open_date, close_date, open_order_id
from trades_bak
""")
# Reread columns - the above recreated the table!
inspector = inspect(engine)
cols = inspector.get_columns('trades')
if not has_column(cols, 'open_rate_requested'):
engine.execute("alter table trades add open_rate_requested float")
if not has_column(cols, 'close_rate_requested'):
engine.execute("alter table trades add close_rate_requested float")
def cleanup() -> None:
"""
Flushes all pending operations to disk.
@ -88,7 +139,9 @@ class Trade(_DECL_BASE):
fee_open = Column(Float, nullable=False, default=0.0)
fee_close = Column(Float, nullable=False, default=0.0)
open_rate = Column(Float)
open_rate_requested = Column(Float)
close_rate = Column(Float)
close_rate_requested = Column(Float)
close_profit = Column(Float)
stake_amount = Column(Float, nullable=False)
amount = Column(Float)

102
freqtrade/tests/test_persistence.py
View File

@ -375,3 +375,105 @@ def test_clean_dry_run_db(default_conf, fee):
# We have now only the prod
assert len(Trade.query.filter(Trade.open_order_id.isnot(None)).all()) == 1
def test_migrate_old(default_conf, fee):
"""
Test Database migration(starting with old pairformat)
"""
amount = 103.223
create_table_old = """CREATE TABLE IF NOT EXISTS "trades" (
id INTEGER NOT NULL,
exchange VARCHAR NOT NULL,
pair VARCHAR NOT NULL,
is_open BOOLEAN NOT NULL,
fee FLOAT NOT NULL,
open_rate FLOAT,
close_rate FLOAT,
close_profit FLOAT,
stake_amount FLOAT NOT NULL,
amount FLOAT,
open_date DATETIME NOT NULL,
close_date DATETIME,
open_order_id VARCHAR,
PRIMARY KEY (id),
CHECK (is_open IN (0, 1))
);"""
insert_table_old = """INSERT INTO trades (exchange, pair, is_open, fee,
open_rate, stake_amount, amount, open_date)
VALUES ('BITTREX', 'BTC_ETC', 1, {fee},
0.00258580, {stake}, {amount},
'2017-11-28 12:44:24.000000')
""".format(fee=fee.return_value,
stake=default_conf.get("stake_amount"),
amount=amount
)
engine = create_engine('sqlite://')
# Create table using the old format
engine.execute(create_table_old)
engine.execute(insert_table_old)
# Run init to test migration
init(default_conf, engine)
assert len(Trade.query.filter(Trade.id == 1).all()) == 1
trade = Trade.query.filter(Trade.id == 1).first()
assert trade.fee_open == fee.return_value
assert trade.fee_close == fee.return_value
assert trade.open_rate_requested is None
assert trade.close_rate_requested is None
assert trade.is_open == 1
assert trade.amount == amount
assert trade.stake_amount == default_conf.get("stake_amount")
assert trade.pair == "ETC/BTC"
assert trade.exchange == "bittrex"
def test_migrate_new(default_conf, fee):
"""
Test Database migration (starting with new pairformat)
"""
amount = 103.223
create_table_old = """CREATE TABLE IF NOT EXISTS "trades" (
id INTEGER NOT NULL,
exchange VARCHAR NOT NULL,
pair VARCHAR NOT NULL,
is_open BOOLEAN NOT NULL,
fee FLOAT NOT NULL,
open_rate FLOAT,
close_rate FLOAT,
close_profit FLOAT,
stake_amount FLOAT NOT NULL,
amount FLOAT,
open_date DATETIME NOT NULL,
close_date DATETIME,
open_order_id VARCHAR,
PRIMARY KEY (id),
CHECK (is_open IN (0, 1))
);"""
insert_table_old = """INSERT INTO trades (exchange, pair, is_open, fee,
open_rate, stake_amount, amount, open_date)
VALUES ('binance', 'ETC/BTC', 1, {fee},
0.00258580, {stake}, {amount},
'2019-11-28 12:44:24.000000')
""".format(fee=fee.return_value,
stake=default_conf.get("stake_amount"),
amount=amount
)
engine = create_engine('sqlite://')
# Create table using the old format
engine.execute(create_table_old)
engine.execute(insert_table_old)
# Run init to test migration
init(default_conf, engine)
assert len(Trade.query.filter(Trade.id == 1).all()) == 1
trade = Trade.query.filter(Trade.id == 1).first()
assert trade.fee_open == fee.return_value
assert trade.fee_close == fee.return_value
assert trade.open_rate_requested is None
assert trade.close_rate_requested is None
assert trade.is_open == 1
assert trade.amount == amount
assert trade.stake_amount == default_conf.get("stake_amount")
assert trade.pair == "ETC/BTC"
assert trade.exchange == "binance"