Replace RPC calls with runtime calls (#279)

* Updated contracts code to use runtime call

* Replace RPC calls with runtime calls

* system_accountNextIndex -> AccountNonceApi.account_nonce
* payment_queryInfo -> TransactionPaymentApi.query_info

* Bump scalecodec

Author: arjanz

requirements.txt

@@ -11,7 +11,7 @@ eth_utils>=1.3.0,<3
 pycryptodome>=3.11.0,<4
 PyNaCl>=1.0.1,<2
 
-scalecodec>=1.1.2,<1.2
+scalecodec>=1.1.3,<1.2
 py-sr25519-bindings>=0.2.0,<1
 py-ed25519-zebra-bindings>=1.0,<2
 py-bip39-bindings>=0.1.9,<1

setup.py

@@ -189,7 +189,7 @@
         'eth_utils>=1.3.0,<3',
         'pycryptodome>=3.11.0,<4',
         'PyNaCl>=1.0.1,<2',
-        'scalecodec>=1.1.2,<1.2',
+        'scalecodec>=1.1.3,<1.2',
         'py-sr25519-bindings>=0.2.0,<1',
         'py-ed25519-zebra-bindings>=1.0,<2',
         'py-bip39-bindings>=0.1.9,<1'

substrateinterface/base.py

@@ -1731,7 +1731,11 @@ def get_account_nonce(self, account_address) -> int:
         -------
         int
         """
-        response = self.rpc_request("system_accountNextIndex", [account_address])
+        if self.supports_rpc_method('state_call'):
+            nonce_obj = self.runtime_call("AccountNonceApi", "account_nonce", [account_address])
+            return nonce_obj.value
+        else:
+            response = self.rpc_request("system_accountNextIndex", [account_address])
         return response.get('result', 0)
 
     def generate_signature_payload(self, call: GenericCall, era=None, nonce: int = 0, tip: int = 0,
@@ -2143,27 +2147,36 @@ def get_payment_info(self, call: GenericCall, keypair: Keypair):
             signature=signature
         )
 
-        payment_info = self.rpc_request('payment_queryInfo', [str(extrinsic.data)])
+        if self.supports_rpc_method('state_call'):
+            extrinsic_len = self.runtime_config.create_scale_object('u32')
+            extrinsic_len.encode(len(extrinsic.data))
 
-        # convert partialFee to int
-        if 'result' in payment_info:
-            payment_info['result']['partialFee'] = int(payment_info['result']['partialFee'])
+            result = self.runtime_call("TransactionPaymentApi", "query_info", [extrinsic, extrinsic_len])
 
-            if type(payment_info['result']['weight']) is int:
-                # Transform format to WeightV2 if applicable as per https://github.com/paritytech/substrate/pull/12633
-                try:
-                    weight_obj = self.runtime_config.create_scale_object("sp_weights::weight_v2::Weight")
-                    if weight_obj is not None:
-                        payment_info['result']['weight'] = {
-                            'ref_time': payment_info['result']['weight'],
-                            'proof_size': 0
-                        }
-                except NotImplementedError:
-                    pass
-
-            return payment_info['result']
+            return result.value
         else:
-            raise SubstrateRequestException(payment_info['error']['message'])
+            # Backwards compatibility; deprecated RPC method
+            payment_info = self.rpc_request('payment_queryInfo', [str(extrinsic.data)])
+
+            # convert partialFee to int
+            if 'result' in payment_info:
+                payment_info['result']['partialFee'] = int(payment_info['result']['partialFee'])
+
+                if type(payment_info['result']['weight']) is int:
+                    # Transform format to WeightV2 if applicable as per https://github.com/paritytech/substrate/pull/12633
+                    try:
+                        weight_obj = self.runtime_config.create_scale_object("sp_weights::weight_v2::Weight")
+                        if weight_obj is not None:
+                            payment_info['result']['weight'] = {
+                                'ref_time': payment_info['result']['weight'],
+                                'proof_size': 0
+                            }
+                    except NotImplementedError:
+                        pass
+
+                return payment_info['result']
+            else:
+                raise SubstrateRequestException(payment_info['error']['message'])
 
     def get_type_registry(self, block_hash: str = None, max_recursion: int = 4) -> dict:
         """

substrateinterface/contracts.py

@@ -777,10 +777,6 @@ def read(self, keypair: Keypair, method: str, args: dict = None,
 
         input_data = self.metadata.generate_message_data(name=method, args=args)
 
-        # Check Weight format
-        # if self.substrate.config['is_weight_v2'] :
-        #     gas_limit = {'ref_time': gas_limit, 'proof_size': 100}
-
         if self.substrate.supports_rpc_method('state_call'):
             call_result = self.substrate.runtime_call("ContractsApi", "call", {
                 'dest': self.contract_address,

test/test_create_extrinsics.py

@@ -175,7 +175,7 @@ def test_payment_info(self):
             call_function='transfer',
             call_params={
                 'dest': 'EaG2CRhJWPb7qmdcJvy3LiWdh26Jreu9Dx6R1rXxPmYXoDk',
-                'value': 2 * 10 ** 3
+                'value': 2000
             }
         )
         payment_info = self.kusama_substrate.get_payment_info(call=call, keypair=keypair)