fix(bts): small fixes

Author: simusud

smartpy/bts/contracts/src/String.py

@@ -35,7 +35,7 @@ def split_btp_address(base):
     # with sp.else_():
     #     sp.failwith("Only one element")
 
-    return sp.pair(last.value, penultimate.value)
+    return sp.pair(penultimate.value, last.value)
 
 
 

smartpy/bts/contracts/src/bts_core.py

@@ -650,7 +650,7 @@ def transfer_fees(self, fa):
         self.only_bts_periphery()
         l = sp.local("l", sp.nat(0))
         sp.for item in self.data.coins_name:
-            sp.if self.data.aggregation_fee[item] != sp.nat(0):
+            sp.if self.data.aggregation_fee.get(item, default_value=sp.nat(0)) != sp.nat(0):
                 self.data.charged_coins[l.value] = item
                 self.data.charged_amounts[l.value] = self.data.aggregation_fee.get(item)
                 del self.data.aggregation_fee[item]