improve per #973 (review)

Author: jseagrave21

neo/Prompt/Commands/Invoke.py

@@ -186,7 +186,8 @@ def TestInvokeContract(wallet, args, withdrawal_tx=None, from_addr=None, min_fee
             try:
                 i_args = []
                 for index, iarg in enumerate(contract.Code.ParameterList):
-                    param, abort = PromptUtils.verify_params(ContractParameterType(iarg), params[index])
+                    ptype = ContractParameterType(iarg)
+                    param, abort = PromptUtils.verify_params(ptype, params[index])
                     if abort:
                         return None, None, None, None, False
                     i_args.append(param)
@@ -195,6 +196,9 @@ def TestInvokeContract(wallet, args, withdrawal_tx=None, from_addr=None, min_fee
             except IndexError:
                 print(f"Check params. {len(contract.Code.ParameterList)} params specified and only {len(params)} given.")
                 return None, None, None, None, False
+            except Exception as e:
+                print("Could not parse param as %s : %s " % (ptype, e))
+                return None, None, None, None, False
         else:
             params.reverse()
 
@@ -470,7 +474,8 @@ def test_deploy_and_invoke(deploy_script, invoke_args, wallet,
             try:
                 i_args = []
                 for index, iarg in enumerate(contract_state.Code.ParameterList):
-                    param, abort = PromptUtils.verify_params(ContractParameterType(iarg), invoke_args[index])
+                    ptype = ContractParameterType(iarg)
+                    param, abort = PromptUtils.verify_params(ptype, invoke_args[index])
                     if abort:
                         return None, [], 0, None
                     i_args.append(param)
@@ -479,6 +484,9 @@ def test_deploy_and_invoke(deploy_script, invoke_args, wallet,
             except IndexError:
                 print(f"Check params. {len(contract_state.Code.ParameterList)} params specified and only {len(invoke_args)} given.")
                 return None, [], 0, None
+            except Exception as e:
+                print("Could not parse param as %s : %s " % (ptype, e))
+                return None, [], 0, None
         else:
             invoke_args.reverse()
 

neo/Prompt/Utils.py

@@ -322,15 +322,21 @@ def verify_params(ptype, param):
     elif ptype == ContractParameterType.ByteArray:
         if isinstance(param, str) and len(param) == 34 and param[0] == 'A':
             return Helper.AddrStrToScriptHash(param).Data, False
-        res = eval(param, {"__builtins__": {'bytearray': bytearray, 'bytes': bytes}}, {})
-        if isinstance(res, bytes):
-            return bytearray(res), False
-        return res, False
+        try:
+            res = eval(param, {"__builtins__": {'bytearray': bytearray, 'bytes': bytes}}, {})
+            if isinstance(res, bytes):
+                return bytearray(res), False
+            return res, False
+        except Exception:
+            raise Exception("Please provide a bytearray or bytes object")
 
     elif ptype == ContractParameterType.Array:
-        res = eval(param)
-        if isinstance(res, list):
-            return res, False
+        try:
+            res = eval(param)
+            if isinstance(res, list):
+                return res, False
+        except Exception:
+            pass
         raise Exception("Please provide a list")
     else:
         raise Exception("Unknown param type %s " % ptype.name)

neo/Prompt/test_utils.py

@@ -153,11 +153,13 @@ def test_parse_no_address(self):
         self.assertFalse(result)
 
     def test_gather_param(self):
+        # test string input
         with mock.patch('neo.Prompt.Utils.get_input_prompt', return_value='hello') as fake_prompt:
             result, abort = Utils.gather_param(0, ContractParameterType.String)
 
             self.assertEqual(result, 'hello')
 
+        # test integer input
         with mock.patch('neo.Prompt.Utils.get_input_prompt', return_value=1) as fake_prompt:
             result, abort = Utils.gather_param(0, ContractParameterType.Integer)
 
@@ -173,6 +175,7 @@ def test_gather_param(self):
 
             self.assertEqual(result, 1)
 
+        # test bytearray input
         with mock.patch('neo.Prompt.Utils.get_input_prompt', return_value="bytearray(b'abc')") as fake_prompt:
             result, abort = Utils.gather_param(0, ContractParameterType.ByteArray)
 
@@ -183,6 +186,14 @@ def test_gather_param(self):
 
             self.assertEqual(result, bytearray(b'abc'))
 
+        # test string input when expecting bytearray
+        with mock.patch('neo.Prompt.Utils.get_input_prompt', return_value="abc") as fake_prompt:
+            result, abort = Utils.gather_param(0, ContractParameterType.ByteArray, do_continue=False)
+
+            self.assertEqual(result, None)
+            self.assertEqual(abort, True)
+
+        # test boolean input
         with mock.patch('neo.Prompt.Utils.get_input_prompt', return_value="abc") as fake_prompt:
             result, abort = Utils.gather_param(0, ContractParameterType.Boolean)
 
@@ -199,6 +210,7 @@ def test_gather_param(self):
 
             self.assertEqual(result, bytearray(b'\xf9\x1dkp\x85\xdb|Z\xaf\t\xf1\x9e\xee\xc1\xca<\r\xb2\xc6\xec'))
 
+        # test array input
         with mock.patch('neo.Prompt.Utils.get_input_prompt', return_value='["a","b","c"]') as fake_prompt:
             result, abort = Utils.gather_param(0, ContractParameterType.Array)