Refactors to fix hard-coded token symbols.

apps/cic-ussd/cic_ussd/conversions.py

@@ -24,7 +24,7 @@ def from_wei(value: int) -> float:
     """This function converts values in Wei to a token in the cic network.
     :param value: Value in Wei
     :type value: int
-    :return: SRF equivalent of value in Wei
+    :return: platform's default token equivalent of value in Wei
     :rtype: float
     """
     value = float(value) / 1e+6
@@ -33,9 +33,9 @@ def from_wei(value: int) -> float:
 
 def to_wei(value: int) -> int:
     """This functions converts values from a token in the cic network to Wei.
-    :param value: Value in SRF
+    :param value: Value in platform's default token
     :type value: int
-    :return: Wei equivalent of value in SRF
+    :return: Wei equivalent of value in platform's default token
     :rtype: int
     """
     return int(value * 1e+6)

apps/cic-ussd/cic_ussd/state_machine/logic/transaction.py

@@ -12,6 +12,7 @@ from cic_ussd.chain import Chain
 from cic_ussd.db.models.account import AccountStatus, Account
 from cic_ussd.operations import save_to_in_memory_ussd_session_data
 from cic_ussd.phone_number import get_user_by_phone_number
+from cic_ussd.processor import retrieve_token_symbol
 from cic_ussd.redis import create_cached_data_key, get_cached_data
 from cic_ussd.transactions import OutgoingTransactionProcessor
 
@@ -124,14 +125,18 @@ def process_transaction_request(state_machine_data: Tuple[str, dict, Account]):
     """
     user_input, ussd_session, user = state_machine_data
 
+    # retrieve token symbol
+    chain_str = Chain.spec.__str__()
+
     # get user from phone number
     recipient_phone_number = ussd_session.get('session_data').get('recipient_phone_number')
     recipient = get_user_by_phone_number(phone_number=recipient_phone_number)
     to_address = recipient.blockchain_address
     from_address = user.blockchain_address
     amount = int(ussd_session.get('session_data').get('transaction_amount'))
-    chain_str = Chain.spec.__str__()
+    token_symbol = retrieve_token_symbol(chain_str=chain_str)
+
     outgoing_tx_processor = OutgoingTransactionProcessor(chain_str=chain_str,
                                                          from_address=from_address,
                                                          to_address=to_address)
-    outgoing_tx_processor.process_outgoing_transfer_transaction(amount=amount)
+    outgoing_tx_processor.process_outgoing_transfer_transaction(amount=amount, token_symbol=token_symbol)

apps/cic-ussd/cic_ussd/transactions.py

@@ -120,7 +120,7 @@ class OutgoingTransactionProcessor:
         self.from_address = from_address
         self.to_address = to_address
 
-    def process_outgoing_transfer_transaction(self, amount: int, token_symbol='SRF'):
+    def process_outgoing_transfer_transaction(self, amount: int, token_symbol: str):
         """This function initiates standard transfers between one account to another
         :param amount: The amount of tokens to be sent
         :type amount: int