binance {"code":-1013,"msg":"Invalid price."}

• OS: macosx
• Programming Language version: python
• CCXT version: 1.18.412
• Exchange: binance
• Method: create_limit_sell_order

Cxxt is working very well (limit buy/sell orders) on many pairs (with different price precisions) but I have issues with some pairs like BTT/BTC SC/BTC.

So I tried to harcode the price I provide to ccxt in order to see where this {“code”:-1013,“msg”:“Invalid price.”} error is coming from

With harcoded price: 0.00000125

Price is truncated in the request: price=0.000001 (working but wrong price) Request: POST https://api.binance.com/api/v3/order {'X-MBX-APIKEY': ‘xxxx’, 'Content-Type': 'application/x-www-form-urlencoded', 'User-Agent': 'python-requests/2.19.1', 'Accept-Encoding': 'gzip, deflate'} timestamp=xxxx&recvWindow=5000&symbol=BTTBTC&quantity=6491&type=LIMIT&side=SELL&newOrderRespType=RESULT&price=0.000001&timeInForce=GTC&signature=xxxxx

With harcoded price: 0.00000025

Price is truncated in the request: price=0 (failing) Request: POST https://api.binance.com/api/v3/order {'X-MBX-APIKEY': ‘xxx’, 'Content-Type': 'application/x-www-form-urlencoded', 'User-Agent': 'python-requests/2.19.1', 'Accept-Encoding': 'gzip, deflate'} timestamp=xxxx&recvWindow=5000&symbol=BTTBTC&quantity=6491&type=LIMIT&side=SELL&newOrderRespType=RESULT&price=0&timeInForce=GTC&signature=xxxx Response: POST https://api.binance.com/api/v3/order 400 (...) {"code":-1013,"msg":"Invalid price."}

it’s looks like price_to_precision is not working correctly. What you see in the two request is what is return by this method (I tested manually myself)

EDIT: orders are now working by changing part of this ccxt code: https://github.com/0slab/ccxt/blob/master/python/ccxt/binance.py#L799

[odemolliens]

    def price_to_precision(self, symbol, price):
        print("price_to_precision:",price,"  ROUND:",ROUND, "   market",self.markets[symbol]['precision']['price'], "     precision:",self.precisionMode )
        return self.decimal_to_precision(price, ROUND, self.markets[symbol]['precision']['price'], self.precisionMode)

I added a log in base/exchange.py and looks like your internal parameters are always good:

price_to_precision: 0,0000002   ROUND: 1    market 8      precision: 2
Formatted price STEP1 0.0000002
price_to_precision: 0,0000002   ROUND: 1    market 8      precision: 2
Formatted price STEP1.1 0.0000002
price_to_precision: 0,0000002   ROUND: 1    market 8      precision: 2
Formatted price STEP2 0

I will work on the snippet in coming days, it require some works 😉

[odemolliens]

Hello @kroitor,

You right my github fork was not up to date. This is now the case, I tried again without my fix and this is what I get (as proof, I added a printed value “test_416” in my fork to check that I’m using the last version"):

2019-03-30 18:12:56,736 - BOT - INFO - API call: Sell amount 8312.0 at price 0.00000020. test_416

Request: POST https://api.binance.com/api/v3/order {'X-MBX-APIKEY': 'xxx', 'Content-Type': 'application/x-www-form-urlencoded', 'User-Agent': 'python-requests/2.19.1', 'Accept-Encoding': 'gzip, deflate'} timestamp=xxxx&recvWindow=5000&symbol=BTTBTC&quantity=8312&type=LIMIT&side=SELL&newOrderRespType=RESULT&price=0&timeInForce=GTC&signature=xxxx

Response: POST https://api.binance.com/api/v3/order 400 (...) {"code":-1013,"msg":"Invalid price."}

2019-03-30 18:12:57,250 - BOT - WARNING - Unable to sell trade: Could not create limit sell order on market BTT/BTC.Tried to sell amount 8312.0 at rate 0.00000020 .Message: binance {"code":-1013,"msg":"Invalid price."}

So to make my code working, I need to replace this line: https://github.com/ccxt/ccxt/blob/master/python/ccxt/binance.py#L799

With that: https://github.com/0slab/ccxt/blob/master/python/ccxt/binance.py#L800