str -> bytes fix

Author: vbuterin

ethereum/common.py

@@ -56,7 +56,7 @@ def calc_difficulty(parent, timestamp, config=default_config):
     return o
 
 # Given a parent state, initialize a block with the given arguments
-def mk_block_from_prevstate(chain, state=None, timestamp=None, coinbase='\x35'*20, extra_data='moo ha ha says the laughing cow.'):
+def mk_block_from_prevstate(chain, state=None, timestamp=None, coinbase=b'\x35'*20, extra_data='moo ha ha says the laughing cow.'):
     state = state or chain.state
     blk = Block(BlockHeader())
     now = timestamp or chain.time()

ethereum/meta.py

@@ -42,7 +42,7 @@ def apply_block(state, block):
 def make_head_candidate(chain, txqueue=None,
                         parent=None,
                         timestamp=None,
-                        coinbase='\x35'*20,
+                        coinbase=b'\x35'*20,
                         extra_data='moo ha ha says the laughing cow.',
                         min_gasprice=0):
     log.info('Creating head candidate')

ethereum/tests/test_chain.py

@@ -55,7 +55,7 @@ def mine_on_chain(chain, parent=None, transactions=[], coinbase=None, timestamp=
         txqueue.add_transaction(t)
     parent_timestamp = parent.timestamp if parent else chain.state.timestamp
     hc, _ = meta.make_head_candidate(chain, txqueue, parent,
-                             timestamp or parent_timestamp + 1, coinbase or '\x00'*20)
+                             timestamp or parent_timestamp + 1, coinbase or b'\x00'*20)
     assert hc.difficulty == 1
     m = ethpow.Miner(hc)
     rounds = 100