Merge pull request 'moved files' (#10) from mike/rpc_update into main

Reviewed-on: http://172.16.100.2:3000/mike/fastapi/pulls/10

scratch_folder/scratch_file

@@ -59,9 +59,7 @@ def checksumCheck(method, address):
 
     else:
         return False
-'''
 
-'''
             k = sha3.keccak_256()
             print("First 65: " + str(address_type[:-65]))
             print(hash64)
@@ -77,7 +75,7 @@ def checksumCheck(method, address):
 
 
 
-        '''
+        
         valid = re.compile(r"^(bc1|[13])[a-zA-HJ-NP-Z0-9]{25,39}$")
         if valid.match(address) is None:
             return False
@@ -181,3 +179,39 @@ def decode_monero_address(encoded):
 
     #print(binascii.hexlify(keccak256), checksum)
     return False
+
+
+
+# class
+class RPCXMR(object):
+    def __init__(self, url, user, password):
+        self._session = requests.Session()
+        self._url = url
+        self._user = user
+        self._pass = password
+        self._headers = {}
+
+    def call(self, rpcMethod, params):
+        payload = json.dumps({"method": rpcMethod, "params": params, "jsonrpc": "2.0"})
+        tries = 3
+        hadConnectionFailures = False
+        while True:
+            try:
+                response = self._session.post(self._url, headers=self._headers, data=payload, auth=HTTPDigestAuth(self._user, self._pass), timeout=15)
+            except requests.exceptions.ConnectionError:
+                tries -= 1
+                if tries == 0:
+                    raise Exception('Failed to connect for remote procedure call.')
+                hadFailedConnections = True
+                print("Couldn't connect for remote procedure call, will sleep for two seconds and then try again ({} more tries)".format(tries))
+                #time.sleep(2)
+            else:
+                if hadConnectionFailures:
+                    print('Connected for remote procedure call after retry.')
+                break
+        if not response.status_code in (200, 500):
+            raise Exception('RPC connection failure: ' + str(response.status_code) + ' ' + response.reason)
+        responseJSON = response.json()
+        if 'error' in responseJSON and responseJSON['error'] != None:
+            raise Exception('Error in RPC call: ' + str(responseJSON['error']))
+        return responseJSON['result']