Python utils.sha3函数代码示例

def test_genesis_hash(genesis_fixture):
    set_db()
    genesis = blocks.genesis()
    """
    YP: https://raw.githubusercontent.com/ethereum/latexpaper/master/Paper.tex
    0256 , SHA3RLP(), 0160 , stateRoot, 0256 , 2**22 , 0, 0, 1000000, 0, 0, (),
    SHA3(42), (), ()

    Where 0256 refers to the parent and state and transaction root hashes,
    a 256-bit hash which is all zeroes;
    0160 refers to the coinbase address,
    a 160-bit hash which is all zeroes;
    2**22 refers to the difficulty;
    0 refers to the timestamp (the Unix epoch);
    () refers to the extradata and the sequences of both uncles and
    transactions, all empty.
    SHA3(42) refers to the SHA3 hash of a byte array of length one whose first
    and only byte is of value 42.
    SHA3RLP() values refer to the hashes of the transaction and uncle lists
    in RLP
    both empty.
    The proof-of-concept series include a development premine, making the state
    root hash some value stateRoot. The latest documentation should be
    consulted for the value of the state root.
    """

    h256 = '\00' * 32
    sr = genesis_fixture['genesis_state_root'].decode('hex')
    genesis_block_defaults = [
        ["prevhash", "bin", h256],  # h256()
        ["uncles_hash", "bin", utils.sha3(rlp.encode([]))],  # sha3EmptyList
        ["coinbase", "addr", "0" * 40],  # h160()
        ["state_root", "trie_root", sr],  # stateRoot
        ["tx_list_root", "trie_root", trie.BLANK_ROOT],  # h256()
        ["difficulty", "int", 2 ** 22],  # c_genesisDifficulty
        ["number", "int", 0],  # 0
        ["min_gas_price", "int", 0],  # 0
        ["gas_limit", "int", 10 ** 6],  # 10**6 for genesis
        ["gas_used", "int", 0],  # 0
        ["timestamp", "int", 0],  # 0
        ["extra_data", "bin", ""],  # ""
        ["nonce", "bin", utils.sha3(chr(42))],  # sha3(bytes(1, 42));
    ]

    cpp_genesis_block = rlp.decode(
        genesis_fixture['genesis_rlp_hex'].decode('hex'))
    cpp_genesis_header = cpp_genesis_block[0]

    for i, (name, typ, genesis_default) in enumerate(genesis_block_defaults):
        assert utils.decoders[typ](cpp_genesis_header[i]) == genesis_default
        assert getattr(genesis, name) == genesis_default

    assert genesis.hex_hash() == genesis_fixture['genesis_hash']

    assert genesis.hex_hash() == utils.sha3(
        genesis_fixture['genesis_rlp_hex'].decode('hex')
    ).encode('hex')

def test_genesis_hash():
    set_db()
    genesis = blocks.genesis()
    """
    cpp: https://github.com/ethereum/cpp-ethereum/libethereum/BlockInfo.cpp#L64
    h256() << sha3EmptyList << h160() << stateRoot << h256() << c_genesisDifficulty << 0 << 0 << 1000000 << 0 << (uint)0 << string() << sha3(bytes(1, 42));

    PoC5 etherpad: https://ethereum.etherpad.mozilla.org/11
    Genesis block is: ( B32(0, 0, ...), B32(sha3(B())), B20(0, 0, ...), B32(stateRoot), B32(0, 0, ...), P(2^22), P(0), P(0), P(1000000), P(0), P(0) << B() << B32(sha3(B(42))) )

    Genesis hash: 69a7356a245f9dc5b865475ada5ee4e89b18f93c06503a9db3b3630e88e9fb4e

    YP: https://raw.githubusercontent.com/ethereum/latexpaper/master/Paper.tex
    0256 , SHA3RLP(), 0160 , stateRoot, 0256 , 2**22 , 0, 0, 1000000, 0, 0, (), SHA3(42), (), ()

    Where 0256 refers to the parent and state and transaction root hashes, 
    a 256-bit hash which is all zeroes; 
    0160 refers to the coinbase address, 
    a 160-bit hash which is all zeroes; 
    2**22 refers to the difficulty; 
    0 refers to the timestamp (the Unix epoch); 
    () refers to the extradata and the sequences of both uncles and transactions, all empty. 
    SHA3(42) refers to the SHA3 hash of a byte array of length one whose first
    and only byte is of value 42. 
    SHA3RLP() values refer to the hashes of the transaction and uncle lists in RLP, 
    both empty.
    The proof-of-concept series include a development premine, making the state root 
    hash some value stateRoot. The latest documentation should be consulted for 
    the value of the state root.
    """

    h256 = "\x00" * 32
    sr = CPP_PoC5_GENESIS_STATE_ROOT_HEX_HASH.decode('hex')
    genisi_block_defaults = [
        ["prevhash", "bin", h256],  # h256()
        ["uncles_hash", "bin", utils.sha3(rlp.encode([]))],  # sha3EmptyList
        ["coinbase", "addr", "0" * 40],  # h160()
        ["state_root", "trie_root", sr],  # stateRoot
        ["tx_list_root", "trie_root", h256],  # h256()
        ["difficulty", "int", 2 ** 22],  # c_genesisDifficulty
        ["number", "int", 0],  # 0
        ["min_gas_price", "int", 0],  # 0
        ["gas_limit", "int", 1000000],  # 1000000
        ["gas_used", "int", 0],  # 0
        ["timestamp", "int", 0],  # 0
        ["extra_data", "bin", ""],  # ""
        ["nonce", "bin", utils.sha3(chr(42))],  # sha3(bytes(1, 42));
    ]

    cpp_genesis_block = rlp.decode(CPP_PoC5_GENESIS_HEX.decode('hex'))
    cpp_genesis_header = cpp_genesis_block[0]

    for i, (name, typ, genesis_default) in enumerate(genisi_block_defaults):
        # print name, repr(getattr(genesis, name)),  repr(genesis_default)
        assert utils.decoders[typ](cpp_genesis_header[i]) == genesis_default
        assert getattr(genesis, name) == genesis_default
    assert genesis.hex_hash() == CPP_PoC5_GENESIS_HEX_HASH

def bad(n=21):
    # Build n levels
    t = trie.Trie(s.db)
    accum = ''
    for i in range(n):
        for j in range(1,16):
            k = accum + '%X'%j
            if len(k) % 2 != 0: k += '0'
            k = zpadr(k.decode('hex'))
            print k.encode('hex')
            t.update(k,utils.sha3('cow'))
        accum += '%X'%0
    k = zpadr(accum.decode('hex'))
    t.update(k,utils.sha3('cow'))
    return t

def create_default_config():
    config = ConfigParser.ConfigParser()
    # set some defaults, which may be overwritten
    config.add_section('network')
    config.set('network', 'listen_host', '0.0.0.0')
    config.set('network', 'listen_port', '30303')
    config.set('network', 'num_peers', '5')
    config.set('network', 'remote_port', '30303')
    config.set('network', 'remote_host', '')
    config.set('network', 'client_id', Packeter.CLIENT_ID)
    config.set('network', 'node_id', sha3(str(uuid.uuid1())).encode('hex'))

    config.add_section('api')
    config.set('api', 'listen_host', '127.0.0.1')
    config.set('api', 'listen_port', '30203')

    config.add_section('misc')
    config.set('misc', 'verbosity', '1')
    config.set('misc', 'config_file', None)
    config.set('misc', 'logging', None)
    config.set('misc', 'data_dir', data_dir.path)
    config.set('misc', 'mining', '10')

    config.add_section('wallet')
    config.set('wallet', 'coinbase', '0' * 40)

    return config

def test_status():
    p = get_packeter()
    total_difficulty = 1000
    head_hash = utils.sha3('head')
    genesis_hash = utils.sha3('genesis')
    msg = p.dump_Status(total_difficulty, head_hash, genesis_hash)
    success, res = p.load_packet(msg)
    assert success
    _, _, cmd, data, remain = res
    assert cmd == 'Status'
    assert idec(data[0]) == packeter.Packeter.ETHEREUM_PROTOCOL_VERSION
    assert idec(data[1]) == packeter.Packeter.NETWORK_ID
    assert idec(data[2]) == total_difficulty
    assert data[3] == head_hash
    assert data[4] == genesis_hash
    return

 def create_wrapper(msg):
     ext.set_balance(msg.sender, ext.get_balance(msg.sender) - msg.value)
     sender = msg.sender.decode('hex') if len(msg.sender) == 40 else msg.sender
     nonce = u.encode_int(ext._block.get_nonce(msg.sender))
     addr = u.sha3(rlp.encode([sender, nonce]))[12:].encode('hex')
     hexdata = msg.data.extract_all().encode('hex')
     apply_message_calls.append(dict(gasLimit=msg.gas, value=msg.value,
                                     destination='', data=hexdata))
     return 1, msg.gas, addr

def _recv_Blocks(self, data):
    print("RECEIVED", len(data))
    for x in reversed(data):
        enc = rlp.encode(x)
        #tb = blocks.TransientBlock(enc)
        #print tb
        self.blk_counter += 1
        fh.write(enc.encode('hex') + '\n') # LOG line
        h = utils.sha3(enc)
        print('received block %s %d' % (h.encode('hex'), self.blk_counter))
    request(self,h)

def push_content(content, title, genesis, root_contract, usr):
    key, addr = usr
    nonce = get_nonce(genesis, addr)
    content_hash = utils.sha3(content)
    # push a transaction with a title.  recover title from blockchain
    tx_push = transactions.Transaction(nonce, 0, 10**12, 10000, root_contract, serpent.encode_datalist([1, content_hash, title])).sign(key)
    ans = processblock.apply_tx(genesis, tx_push)

    f = open('data/%s'%content_hash.encode('hex'), 'w')
    f.write(content)
    f.close()

    return content_hash

def genesis_fixture():
    """
    Read genesis block from fixtures.
    """
    genesis_fixture = None
    with open('fixtures/genesishashestest.json', 'r') as f:
        genesis_fixture = json.load(f)
    assert genesis_fixture is not None, "Could not read genesishashtest.json from fixtures. Make sure you did 'git submodule init'!"
    # FIXME: assert that link is uptodate
    for k in ('genesis_rlp_hex', 'genesis_state_root', 'genesis_hash', 'initial_alloc'):
        assert k in genesis_fixture
    assert utils.sha3(genesis_fixture['genesis_rlp_hex'].decode('hex')).encode('hex') ==\
        genesis_fixture['genesis_hash']
    return genesis_fixture

def deserialize_child(parent, rlpdata):
    """
    deserialization w/ replaying transactions
    """
    header_args, transaction_list, uncles = rlp.decode(rlpdata)
    assert len(header_args) == len(blocks.block_structure)
    kargs = dict(transaction_list=transaction_list, uncles=uncles)
    # Deserialize all properties
    for i, (name, typ, default) in enumerate(blocks.block_structure):
        kargs[name] = utils.decoders[typ](header_args[i])

    block = blocks.Block.init_from_parent(parent, kargs['coinbase'],
                                          extra_data=kargs['extra_data'],
                                          timestamp=kargs['timestamp'])
    block.finalize()  # this is the first potential state change
    # replay transactions
    for tx_lst_serialized, _state_root, _gas_used_encoded in transaction_list:

        tx = transactions.Transaction.create(tx_lst_serialized)
        logger.debug("data %r", tx.data)
        logger.debug('applying %r', tx)
        logger.debug('applying %r', tx.to_dict())
        logger.debug('block.gas_used before: %r', block.gas_used)
        success, output = processblock.apply_transaction(block, tx)
        logger.debug('block.gas_used after: %r', block.gas_used)
        logger.debug('success: %r', success)
        diff = utils.decode_int(_gas_used_encoded) - block.gas_used
        logger.debug("GAS_USED DIFF %r", diff)
        assert utils.decode_int(_gas_used_encoded) == block.gas_used
        assert _state_root.encode('hex') == block.state.root_hash.encode('hex')

    # checks
    assert block.prevhash == parent.hash
    assert block.tx_list_root == kargs['tx_list_root']
    assert block.gas_used == kargs['gas_used']
    assert block.gas_limit == kargs['gas_limit']
    assert block.timestamp == kargs['timestamp']
    assert block.difficulty == kargs['difficulty']
    assert block.number == kargs['number']
    assert block.extra_data == kargs['extra_data']
    assert utils.sha3(rlp.encode(block.uncles)) == kargs['uncles_hash']
    assert block.state.root_hash.encode(
        'hex') == kargs['state_root'].encode('hex')

    block.uncles_hash = kargs['uncles_hash']
    block.nonce = kargs['nonce']
    block.min_gas_price = kargs['min_gas_price']

    return block

def _get_block_before_tx(txhash):
    tx, blk = chain_manager.index.get_transaction(txhash.decode('hex'))
    # get the state we had before this transaction
    test_blk = Block.init_from_parent(blk.get_parent(),
                                        blk.coinbase,
                                        extra_data=blk.extra_data,
                                        timestamp=blk.timestamp,
                                        uncles=blk.uncles)
    pre_state = test_blk.state_root
    for i in range(blk.transaction_count):
        tx_lst_serialized, sr, _ = blk.get_transaction(i)
        if utils.sha3(rlp.encode(tx_lst_serialized)) == tx.hash:
            break
        else:
            pre_state = sr
    test_blk.state.root_hash = pre_state
    return test_blk, tx

    def before_feature(self, context, feature):
        '''
        .. note::

            `context.conf` is used instead of `context.config` because `config`
            is used internally in `context` by *behave*

        '''
        context.conf = conf = mock.MagicMock()
        node_id = sha3(str(uuid.uuid1())).encode('hex')
        tempdir = tempfile.mkdtemp()

        def get_side_effect(section, option):
            if section == 'network' and option == 'client_id':
                return 'client id'

            if section == 'network' and option == 'listen_host':
                return '0.0.0.0'

            if section == 'network' and option == 'node_id':
                return node_id

            if section == 'wallet' and option == 'coinbase':
                return '0'*40

            if section == 'misc' and option == 'data_dir':
                return tempdir

        def getint_side_effect(section, option):
            if section == 'network' and option == 'listen_port':
                return 1234

            if section == 'network' and option == 'num_peers':
                return 10

        conf.get.side_effect = get_side_effect
        conf.getint.side_effect = getint_side_effect

import serpent, json, random
from pyethereum import transactions, blocks, processblock,utils

NUM_ACCOUNTS=4

root_code = serpent.compile(open('zeroid.se').read())
root_key = utils.sha3('cow')
root_addr = utils.privtoaddr(root_key)

keys = {}

for x in range(NUM_ACCOUNTS):
  key  = utils.sha3(str(x+4))
  addr = utils.privtoaddr(key)
  keys[addr] = key

endowment = {root_addr: 10**18}

for x in keys:
  endowment[x] = 10**18

genesis = blocks.genesis(endowment)

tx1 = transactions.contract(0, 10**12, 100000, 0, root_code).sign(root_key)

result, contract = processblock.apply_transaction(genesis, tx1)

nonce=1

for address in keys:

def default_node_id():
    return sha3(str(uuid.uuid1())).encode('hex')

def create_config():

    config = ConfigParser.ConfigParser()
    # set some defaults, which may be overwritten
    config.add_section('network')
    config.set('network', 'listen_host', '0.0.0.0')
    config.set('network', 'listen_port', '30303')
    config.set('network', 'num_peers', '5')
    config.set('network', 'remote_port', '30303')
    config.set('network', 'remote_host', '')
    config.set('network', 'client_id', Packeter.CLIENT_ID)
    config.set('network', 'node_id', sha3(str(uuid.uuid1())).encode('hex'))

    config.add_section('api')
    config.set('api', 'listen_host', '127.0.0.1')
    config.set('api', 'listen_port', '30203')

    config.add_section('misc')
    config.set('misc', 'verbosity', '1')
    config.set('misc', 'config_file', None)
    config.set('misc', 'logging', None)
    config.set('misc', 'data_dir', data_dir.path)
    config.set('misc', 'mining', '10')

    config.add_section('wallet')
    config.set('wallet', 'coinbase', '0' * 40)

    usage = "usage: %prog [options]"
    parser = OptionParser(usage=usage,  version=Packeter.CLIENT_ID)
    parser.add_option(
        "-l", "--listen",
        dest="listen_port",
        default=config.get('network', 'listen_port'),
        help="<port>  Listen on the given port for incoming"
        " connected (default: 30303).")
    parser.add_option(
        "-a", "--address",
        dest="coinbase",
        help="Set the coinbase (mining payout) address",
        default=config.get('wallet', 'coinbase'))
    parser.add_option(
        "-d", "--data_dir",
        dest="data_dir",
        help="<path>  Load database from path (default: %s)" % config.get(
            'misc', 'data_dir'),
        default=config.get('misc', 'data_dir'))
    parser.add_option(
        "-r", "--remote",
        dest="remote_host",
        help="<host> Connect to remote host"
        " (try: 54.201.28.117 or 54.204.10.41)")
    parser.add_option(
        "-p", "--port",
        dest="remote_port",
        default=config.get('network', 'remote_port'),
        help="<port> Connect to remote port (default: 30303)"
    )
    parser.add_option(
        "-v", "--verbose",
        dest="verbosity",
        default=config.get('misc', 'verbosity'),
        help="<0 - 3>  Set the log verbosity from 0 to 3 (default: 1)")
    parser.add_option(
        "-m", "--mining",
        dest="mining",
        default=config.get('misc', 'mining'),
        help="<0 - 100> Percent CPU used for mining 0==off (default: 10)")
    parser.add_option(
        "-L", "--logging",
        dest="logging",
        default=config.get('misc', 'logging'),
        help="<logger1:LEVEL,logger2:LEVEL> set the console log level for"
        " logger1, logger2, etc. Empty loggername means root-logger,"
        " e.g. 'pyethereum.wire:DEBUG,:INFO'. Overrides '-v'")
    parser.add_option(
        "-x", "--peers",
        dest="num_peers",
        default=config.get('network', 'num_peers'),
        help="<number> Attempt to connect to given number of peers"
        "(default: 5)")
    parser.add_option("-C", "--config",
                      dest="config_file",
                      help="read coniguration")

    (options, args) = parser.parse_args()

    # set network options
    for attr in ('listen_port', 'remote_host', 'remote_port', 'num_peers'):
        config.set('network', attr, getattr(
            options, attr) or config.get('network', attr))
    # set misc options
    for attr in ('verbosity', 'config_file', 'logging', 'data_dir', 'mining'):
        config.set(
            'misc', attr, getattr(options, attr) or config.get('misc', attr))

    # set wallet options
    for attr in ('coinbase',):
        config.set(
            'wallet', attr, getattr(options, attr) or config.get('wallet', attr))

#.........这里部分代码省略.........