Further python3 fixes

Author: vub

ethereum/abi.py

@@ -488,9 +488,9 @@ def decode_single(typ, data):
             l = big_endian_to_int(data[0:32])
             return data[32:][:l]
     elif base == 'uint':
-        return big_endian_to_int(data)
+        return big_endian_to_int(data) % 2**int(sub)
     elif base == 'int':
-        o = big_endian_to_int(data)
+        o = big_endian_to_int(data) % 2**int(sub)
         return (o - 2**int(sub)) if o >= 2**(int(sub) - 1) else o
     elif base == 'ureal':
         high, low = [int(x) for x in sub.split('x')]

ethereum/state.py

@@ -213,12 +213,12 @@ def reset_storage(self, addr):
         if addr in self.cache:
             for k in self.cache[addr]:
                 if k not in ACCOUNT_SPECIAL_PARAMS:
-                    self.set_storage(addr, k, '')
+                    self.set_storage(addr, k, b'')
         t = SecureTrie(Trie(self.trie.db))
         acct = self._get_account_unsafe(addr)
         t.root_hash = acct.storage
         for k in t.to_dict().keys():
-            self.set_storage(addr, k, '')
+            self.set_storage(addr, k, b'')
 
     # Commit the cache to the trie
     def commit(self, allow_empties=False):
@@ -281,7 +281,7 @@ def del_account(self, address):
         self.reset_storage(address)
         self.set_balance(address, 0)
         self.set_nonce(address, 0)
-        self.set_code(address, '')
+        self.set_code(address, b'')
         self.set_storage(address, 'deleted', True)
 
     def add_log(self, log):

ethereum/vm.py

@@ -227,7 +227,7 @@ def vm_execute(ext, msg, code):
                            'EXTCODECOPY'):
                 if len(compustate.memory) < 1024:
                     trace_data['memory'] = \
-                        b''.join([encode_hex(ascii_chr(x)) for x
+                        ''.join([encode_hex(ascii_chr(x)) for x
                                   in compustate.memory])
                 else:
                     trace_data['sha3memory'] = \