chore: fix MsgExternalTransfer

Author: achilleas-kal

examples/chain_client/30_ExternalTransfer.py

@@ -44,7 +44,7 @@ async def main() -> None:
         source_subaccount_id=subaccount_id,
         destination_subaccount_id=dest_subaccount_id,
         amount=100,
-        denom="inj"
+        denom="INJ"
     )
 
     # build sim tx

pyinjective/composer.py

@@ -603,12 +603,19 @@ def MsgExternalTransfer(
         amount: int,
         denom: str,
     ):
+        peggy_denom, decimals = Denom.load_peggy_denom(self.network, denom)
+        be_amount = amount_to_backend(amount, decimals)
+        logging.debug(
+            "Loaded send symbol {} ({}) with decimals = {}".format(
+                denom, peggy_denom, decimals
+            )
+        )
 
         return injective_exchange_tx_pb.MsgExternalTransfer(
             sender=sender,
             source_subaccount_id=source_subaccount_id,
             destination_subaccount_id=destination_subaccount_id,
-            amount=self.Coin(amount=amount, denom=denom),
+            amount=self.Coin(amount=be_amount, denom=peggy_denom),
         )
 
     def MsgBid(self, sender: str, bid_amount: float, round: float):