Python Forum

import time
import hmac
import urllib
import requests
import hashlib
import base64
import sys
import json

API_KEY = 'ac85417173...abdf98138e...02'
API_SECRET = 'KY9R6bgPfQeDr2kV...rwm4aoGk0EvQwU...eduafbsk'


def api_query( method, req = None ):
 if not req:
         req = {}
 print ("def api_query( method = " + method + ", req = " + str( req ) + " ):")
 time.sleep( 1 )
 public_set = set([ "GetCurrencies", "GetTradePairs", "GetMarkets", "GetMarket", "GetMarketHistory", "GetMarketOrders" ])
 private_set = set([ "GetBalance", "GetDepositAddress", "GetOpenOrders", "GetTradeHistory", "GetTransactions", "SubmitTrade", "CancelTrade", "SubmitTip" ])
 if method in public_set:
         url = "https://www.cryptopia.co.nz/api/" + method
         if req:
             for param in req:
                 url += '/' + str( param )
         r = requests.get( url )
 elif method in private_set:
         url = "https://www.cryptopia.co.nz/Api/" + method
         nonce = str( int( time.time() ) )
         post_data = json.dumps( req );
         m = hashlib.md5()
         m.update(post_data.encode('utf-8'))
         requestContentBase64String = base64.b64encode(m.digest())
         signature = API_KEY + "POST" + urllib.parse.quote_plus( url ).lower() + nonce + requestContentBase64String
         hmacsignature = base64.b64encode(hmac.new(base64.b64decode( API_SECRET ), signature, hashlib.sha256).digest())
         header_value = "amx " + API_KEY + ":" + hmacsignature + ":" + nonce
         headers = { 'Authorization': header_value, 'Content-Type':'application/json; charset=utf-8' }
         r = requests.post( url, data = post_data, headers = headers )
 response = r.text
 print ("( Response ): " + response)
 return response.replace("false","False").replace("true","True").replace('":null','":None' )


# Public:
# +
# print api_query("GetCurrencies")

# +
#print (api_query("GetMarket", [ 101, 6 ] ))
# {"Success":True,"Message":None,"Data":{"TradePairId":100,"Label":"DOT/BTC","AskPrice":0.00000020,"BidPrice":0.00000019,"Low":0.00000019,"High":0.00000021,"Volume":1263556.65136394,"LastPrice":0.00000019,"LastVolume":774.83684404,"BuyVolume":50896673.08961847,"SellVolume":33046510.52562918,"Change":0.0},"Error":None}

# Private:
print (api_query("GetBalance"))

# +
# print api_query("GetBalance", {'CurrencyId':2} )

(Jan-06-2018, 04:22 PM)wavic Wrote: [ -> ]base64.b64encode(m.digest()) returns bytes. You have to convert it to string.

requestContentBase64String = base64.b64encode(m.digest()).decode('utf-8')

(Jan-06-2018, 04:33 PM)wavic Wrote: [ -> ]line 33:

requestContentBase64String = base64.b64encode(m.digest()).decode('utf-8')

(Jan-06-2018, 05:16 PM)wavic Wrote: [ -> ]There is something with the API_SECRET value. See the altchars parameter.

(Jan-06-2018, 06:16 PM)wavic Wrote: [ -> ]Consider that base64.b64encode(hmac.new(base64.b64decode( API_SECRET ), signature, hashlib.sha256).digest()) will return bytes again. So you have to convert it to string. As before

(Jan-06-2018, 06:25 PM)Zhsv Wrote: [ -> ]

(Jan-06-2018, 06:16 PM)wavic Wrote: [ -> ]Consider that base64.b64encode(hmac.new(base64.b64decode( API_SECRET ), signature, hashlib.sha256).digest()) will return bytes again. So you have to convert it to string. As before

Thank you very much!
Now you will understand and change code.

 elif method in private_set:
         url = "https://www.cryptopia.co.nz/Api/" + method
         nonce = str( int( time.time() ) )
         post_data = json.dumps( req );
         m = hashlib.md5()
         m.update(post_data.encode('utf-8'))
         requestContentBase64String = base64.b64encode(m.digest()).decode('utf-8')
         signature = API_KEY + "POST" + urllib.parse.quote_plus( url ).lower() + nonce + requestContentBase64String
         hmacsignature = base64.b64encode(hmac.new(base64.b64decode( API_SECRET ), signature, hashlib.sha256).digest()).decode('utf-8')
         header_value = "amx " + API_KEY + ":" + hmacsignature + ":" + nonce
         headers = { 'Authorization': header_value, 'Content-Type':'application/json; charset=utf-8' }
         r = requests.post( url, data = post_data, headers = headers )
 response = r.text

Error:
def api_query( method = GetBalance, req = {} ):
Traceback (most recent call last):
  File "C:/Cloud/Cripto/3.py", line 53, in <module>
    print (api_query("GetBalance"))
  File "C:/Cloud/Cripto/3.py", line 35, in api_query
    hmacsignature = base64.b64encode(hmac.new(base64.b64decode( API_SECRET ), signature, hashlib.sha256).digest()).decode('utf-8')
  File "C:\Users\Сергей\AppData\Local\Programs\Python\Python36-32\lib\base64.py", line 87, in b64decode
    return binascii.a2b_base64(s)
binascii.Error: Incorrect padding
>>>