예제 #1
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def test_fetcher_timeout():
    peer1, peer2 = create_peers()

    TX_LIST = [make_tx(i) for i in range(100)]

    @asyncio.coroutine
    def run_peer1():
        r = []
        yield from standards.initial_handshake(peer1, VERSION_MSG)
        next_message = peer1.new_get_next_message_f()
        t = yield from next_message()
        r.append(t)
        return r

    @asyncio.coroutine
    def run_peer2():
        r = []
        yield from standards.initial_handshake(peer2, VERSION_MSG_2)
        tx_fetcher = Fetcher(peer2)
        tx = yield from tx_fetcher.fetch(mi(TX_LIST[0].hash()), timeout=2)
        r.append(tx)
        return r

    f1 = asyncio.Task(run_peer1())
    f2 = asyncio.Task(run_peer2())

    asyncio.get_event_loop().run_until_complete(asyncio.wait([f1, f2]))

    r = f1.result()
    assert len(r) == 1
    assert r[0] == ("getdata", dict(items=(InvItem(ITEM_TYPE_TX, TX_LIST[0].hash()),)))

    r = f2.result()
    assert len(r) == 1
    assert r[0] == None
예제 #2
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def test_TxHandler_simple():
    # create some peers
    peer1_2, peer2_1 = create_handshaked_peers(ip1="127.0.0.1", ip2="127.0.0.2")
    peer1_3, peer3_1 = create_handshaked_peers(ip1="127.0.0.1", ip2="127.0.0.3")

    TX_LIST = [make_tx(i) for i in range(20)]

    @asyncio.coroutine
    def run_client(peer_list, tx_list):
        tx_store = {}
        inv_collector = InvCollector()
        tx_handler = TxHandler(inv_collector, tx_store)
        for tx in tx_list:
            tx_handler.add_tx(tx)
        for peer in peer_list:
            inv_collector.add_peer(peer)
            tx_handler.add_peer(peer)
        while len(tx_store) < 20:
            yield from asyncio.sleep(0.1)
        return tx_store

    f1 = asyncio.Task(run_client([peer1_2, peer1_3], []))
    f2 = asyncio.Task(run_client([peer2_1], TX_LIST[:10]))
    f3 = asyncio.Task(run_client([peer3_1], TX_LIST[10:]))

    done, pending = asyncio.get_event_loop().run_until_complete(asyncio.wait([f1, f2, f3], timeout=5.0))
    assert len(done) == 3
    assert len(pending) == 0
    for i in range(3):
        r = done.pop().result()
        assert len(r) == 20
        assert set(tx.hash() for tx in r.values()) == set(tx.hash() for tx in TX_LIST)
예제 #3
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def test_InvCollector():
    # create some peers
    peer1_2, peer2 = create_handshaked_peers()
    peer1_3, peer3 = create_handshaked_peers(ip1="127.0.0.1", ip2="127.0.0.3")
    peer1_4, peer4 = create_handshaked_peers(ip1="127.0.0.1", ip2="127.0.0.4")

    # peer1_* represents the local peer

    TX_LIST = [make_tx(i) for i in range(100)]

    @asyncio.coroutine
    def run_local_peer(inv_collector, inv_item_q):
        r = []
        while len(r) < 90:
            inv_item = yield from inv_item_q.get()
            v = yield from inv_collector.fetch(inv_item)
            r.append(v)
        return r

    @asyncio.coroutine
    def run_remote_peer(next_message, peer, txs):
        tx_db = dict((tx.hash(), tx) for tx in txs)
        r = []

        inv_items = [InvItem(ITEM_TYPE_TX, tx.hash()) for tx in txs]
        peer.send_msg("inv", items=inv_items)

        while True:
            t = yield from next_message()
            r.append(t)
            if t[0] == 'getdata':
                for inv_item in t[1]["items"]:
                    peer.send_msg("tx", tx=tx_db[inv_item.data])
        return r

    futures = []
    for peer, txs in [(peer2, TX_LIST[:30]), (peer3, TX_LIST[30:60]),
                      (peer4, TX_LIST[60:90])]:
        f = asyncio.Task(
            run_remote_peer(peer.new_get_next_message_f(), peer, txs))
        futures.append(f)

    inv_collector = InvCollector()
    [inv_collector.add_peer(peer) for peer in [peer1_2, peer1_3, peer1_4]]

    f = asyncio.Task(
        run_local_peer(inv_collector, inv_collector.new_inv_item_queue()))
    done, pending = asyncio.get_event_loop().run_until_complete(
        asyncio.wait([f], timeout=5.0))
    r = done.pop().result()
    assert len(r) == 90
    assert [tx.hash() for tx in r] == [tx.hash() for tx in TX_LIST[:90]]
def test_InvCollector():
    # create some peers
    peer1_2, peer2 = create_handshaked_peers()
    peer1_3, peer3 = create_handshaked_peers(ip1="127.0.0.1", ip2="127.0.0.3")
    peer1_4, peer4 = create_handshaked_peers(ip1="127.0.0.1", ip2="127.0.0.4")

    # peer1_* represents the local peer

    TX_LIST = [make_tx(i) for i in range(100)]

    @asyncio.coroutine
    def run_local_peer(inv_collector, inv_item_q):
        r = []
        while len(r) < 90:
            inv_item = yield from inv_item_q.get()
            v = yield from inv_collector.fetch(inv_item)
            r.append(v)
        return r

    @asyncio.coroutine
    def run_remote_peer(next_message, peer, txs):
        tx_db = dict((tx.hash(), tx) for tx in txs)
        r = []

        inv_items = [InvItem(ITEM_TYPE_TX, tx.hash()) for tx in txs]
        peer.send_msg("inv", items=inv_items)

        while True:
            t = yield from next_message()
            r.append(t)
            if t[0] == "getdata":
                for inv_item in t[1]["items"]:
                    peer.send_msg("tx", tx=tx_db[inv_item.data])
        return r

    futures = []
    for peer, txs in [(peer2, TX_LIST[:30]), (peer3, TX_LIST[30:60]), (peer4, TX_LIST[60:90])]:
        f = asyncio.Task(run_remote_peer(peer.new_get_next_message_f(), peer, txs))
        futures.append(f)

    inv_collector = InvCollector()
    [inv_collector.add_peer(peer) for peer in [peer1_2, peer1_3, peer1_4]]

    f = asyncio.Task(run_local_peer(inv_collector, inv_collector.new_inv_item_queue()))
    done, pending = asyncio.get_event_loop().run_until_complete(asyncio.wait([f], timeout=5.0))
    r = done.pop().result()
    assert len(r) == 90
    assert [tx.hash() for tx in r] == [tx.hash() for tx in TX_LIST[:90]]
예제 #5
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def test_InvCollector_simple():
    # create some peers
    peer1_2, peer2 = create_handshaked_peers()

    # peer1_2 represents the local peer

    TX_LIST = [make_tx(i) for i in range(10)]

    @asyncio.coroutine
    def run_local_peer(peer_list):
        inv_collector = InvCollector()
        for peer in peer_list:
            inv_collector.add_peer(peer)
        r = []
        inv_item_q = inv_collector.new_inv_item_queue()
        while len(r) < 10:
            inv_item = yield from inv_item_q.get()
            v = yield from inv_collector.fetch(inv_item)
            r.append(v)
        return r

    @asyncio.coroutine
    def run_remote_peer(next_message, peer, txs):
        tx_db = dict((tx.hash(), tx) for tx in txs)
        r = []

        inv_items = [InvItem(ITEM_TYPE_TX, tx.hash()) for tx in txs]
        peer.send_msg("inv", items=inv_items)

        while True:
            t = yield from next_message()
            r.append(t)
            if t[0] == 'getdata':
                for inv_item in t[1]["items"]:
                    peer.send_msg("tx", tx=tx_db[inv_item.data])
        return r

    f1 = asyncio.Task(run_local_peer([peer1_2]))
    f2 = asyncio.Task(
        run_remote_peer(peer2.new_get_next_message_f(), peer2, TX_LIST))
    done, pending = asyncio.get_event_loop().run_until_complete(
        asyncio.wait([f1], timeout=3.0))
    r = done.pop().result()
    assert len(r) == 10
    assert [tx.hash() for tx in r] == [tx.hash() for tx in TX_LIST]
def test_InvCollector_simple():
    # create some peers
    peer1_2, peer2 = create_handshaked_peers()

    # peer1_2 represents the local peer

    TX_LIST = [make_tx(i) for i in range(10)]

    @asyncio.coroutine
    def run_local_peer(peer_list):
        inv_collector = InvCollector()
        for peer in peer_list:
            inv_collector.add_peer(peer)
        r = []
        inv_item_q = inv_collector.new_inv_item_queue()
        while len(r) < 10:
            inv_item = yield from inv_item_q.get()
            v = yield from inv_collector.fetch(inv_item)
            r.append(v)
        return r

    @asyncio.coroutine
    def run_remote_peer(next_message, peer, txs):
        tx_db = dict((tx.hash(), tx) for tx in txs)
        r = []

        inv_items = [InvItem(ITEM_TYPE_TX, tx.hash()) for tx in txs]
        peer.send_msg("inv", items=inv_items)

        while True:
            t = yield from next_message()
            r.append(t)
            if t[0] == "getdata":
                for inv_item in t[1]["items"]:
                    peer.send_msg("tx", tx=tx_db[inv_item.data])
        return r

    f1 = asyncio.Task(run_local_peer([peer1_2]))
    f2 = asyncio.Task(run_remote_peer(peer2.new_get_next_message_f(), peer2, TX_LIST))
    done, pending = asyncio.get_event_loop().run_until_complete(asyncio.wait([f1], timeout=3.0))
    r = done.pop().result()
    assert len(r) == 10
    assert [tx.hash() for tx in r] == [tx.hash() for tx in TX_LIST]
예제 #7
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def test_fetcher_timeout():
    peer1, peer2 = create_peers()

    TX_LIST = [make_tx(i) for i in range(100)]

    @asyncio.coroutine
    def run_peer1():
        r = []
        yield from standards.initial_handshake(peer1, VERSION_MSG)
        next_message = peer1.new_get_next_message_f()
        t = yield from next_message()
        r.append(t)
        return r

    @asyncio.coroutine
    def run_peer2():
        r = []
        yield from standards.initial_handshake(peer2, VERSION_MSG_2)
        tx_fetcher = Fetcher(peer2)
        tx = yield from tx_fetcher.fetch(mi(TX_LIST[0].hash()), timeout=2)
        r.append(tx)
        return r

    f1 = asyncio.Task(run_peer1())
    f2 = asyncio.Task(run_peer2())

    asyncio.get_event_loop().run_until_complete(asyncio.wait([f1, f2]))

    r = f1.result()
    assert len(r) == 1
    assert r[0] == ('getdata',
                    dict(items=(InvItem(ITEM_TYPE_TX, TX_LIST[0].hash()), )))

    r = f2.result()
    assert len(r) == 1
    assert r[0] == None
예제 #8
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def test_TxCollector_retry():
    # create some peers
    peer1_2, peer2 = create_handshaked_peers()
    peer1_3, peer3 = create_handshaked_peers(ip1="127.0.0.1", ip2="127.0.0.3")

    TX_LIST = [make_tx(i) for i in range(10)]
    TX_LIST.sort(key=lambda tx: tx.id())

    @asyncio.coroutine
    def run_remote_peer(peer, txs, in_db_count, delay):
        # this peer will immediately advertise the ten transactions
        # But when they are requested, it will only send one,
        # and "notfound" eight.
        yield from asyncio.sleep(delay)
        tx_db = dict((tx.hash(), tx) for tx in txs[:in_db_count])
        r = []

        inv_items = [InvItem(ITEM_TYPE_TX, tx.hash()) for tx in txs]
        peer.send_msg("inv", items=inv_items)

        next_message = peer.new_get_next_message_f()

        while True:
            t = yield from next_message()
            r.append(t)
            if t[0] == 'getdata':
                found = []
                not_found = []
                yield from asyncio.sleep(0.1)
                for inv_item in t[1]["items"]:
                    if inv_item.data in tx_db:
                        found.append(tx_db[inv_item.data])
                    else:
                        not_found.append(inv_item)
                if not_found:
                    if len(not_found) == 9:
                        not_found = not_found[:8]
                    peer.send_msg("notfound", items=not_found)
                for tx in found:
                    peer.send_msg("tx", tx=tx)
        return r

    @asyncio.coroutine
    def run_local_peer(peer_list, r):
        inv_collector = InvCollector()
        for peer in peer_list:
            inv_collector.add_peer(peer)
        inv_item_q = inv_collector.new_inv_item_queue()

        @asyncio.coroutine
        def _do_fetch(inv_collector, inv_item, r):
            v = yield from inv_collector.fetch(inv_item, peer_timeout=3.0)
            if v:
                r.append(v)

        # keep a strong reference to these tasks
        tasks = []
        for i in range(10):
            inv_item = yield from inv_item_q.get()
            tasks.append(asyncio.Task(_do_fetch(inv_collector, inv_item, r)))
        while len(r) < 10:
            yield from asyncio.sleep(0.1)
        return r

    f2 = asyncio.Task(run_remote_peer(peer2, TX_LIST, 1, 0.2))
    f3 = asyncio.Task(run_remote_peer(peer3, TX_LIST, 10, 1.0))

    r = []
    f = asyncio.Task(run_local_peer([peer1_2, peer1_3], r))
    done, pending = asyncio.get_event_loop().run_until_complete(
        asyncio.wait([f], timeout=7.5))

    assert len(done) == 1
    #r = done.pop().result()
    assert len(r) == 10
    assert set(tx.hash() for tx in r) == set(tx.hash() for tx in TX_LIST)
예제 #9
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def test_TxCollector_notfound():
    peer1_2, peer2 = create_handshaked_peers()

    TX_LIST = [make_tx(i) for i in range(10)]

    @asyncio.coroutine
    def run_peer_2(peer, txs):
        # this peer will immediately advertise five transactions
        # But when they are requested, it will say they are "notfound".
        # Then it will sleep 0.25 s, then advertise one transaction,
        # then send it when requested.
        next_message = peer.new_get_next_message_f()

        tx_db = dict((tx.hash(), tx) for tx in txs[5:])
        r = []

        inv_items = [InvItem(ITEM_TYPE_TX, tx.hash()) for tx in txs]
        peer.send_msg("inv", items=inv_items)

        while 1:
            t = yield from next_message()
            r.append(t)
            if t[0] == 'getdata':
                found = []
                not_found = []
                for inv_item in t[1]["items"]:
                    if inv_item.data in tx_db:
                        found.append(tx_db[inv_item.data])
                    else:
                        not_found.append(inv_item)
                if not_found:
                    peer.send_msg("notfound", items=not_found)
                for tx in found:
                    peer.send_msg("tx", tx=tx)

        return r

    @asyncio.coroutine
    def run_local_peer(peer_list):
        inv_collector = InvCollector()
        for peer in peer_list:
            inv_collector.add_peer(peer)
        r = []
        inv_item_q = inv_collector.new_inv_item_queue()
        while len(r) < 5:
            yield from asyncio.sleep(0.1)
            inv_item = yield from inv_item_q.get()
            try:
                v = yield from asyncio.wait_for(inv_collector.fetch(inv_item),
                                                timeout=0.5)
                if v:
                    r.append(v)
            except asyncio.TimeoutError:
                pass
        return r

    f2 = asyncio.Task(run_peer_2(peer2, TX_LIST))

    f = asyncio.Task(run_local_peer([peer1_2]))
    done, pending = asyncio.get_event_loop().run_until_complete(
        asyncio.wait([f], timeout=7.5))
    r = done.pop().result()
    assert len(r) == 5
    assert [tx.hash() for tx in r] == [tx.hash() for tx in TX_LIST[5:]]
예제 #10
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def test_fetcher():
    peer1, peer2 = create_peers()

    TX_LIST = [make_tx(i) for i in range(100)]

    from pycoinnet.message import pack_from_data

    msg_data = pack_from_data("tx", tx=TX_LIST[0])

    item1 = [InvItem(1, TX_LIST[0].hash())]
    item2 = [InvItem(1, TX_LIST[i].hash()) for i in range(2)]
    msg_data = pack_from_data("getdata", items=item1)
    msg_data = pack_from_data("getdata", items=item2)
    msg_data = pack_from_data("notfound", items=item1)
    msg_data = pack_from_data("notfound", items=item2)

    @asyncio.coroutine
    def run_peer1():
        r = []

        yield from standards.initial_handshake(peer1, VERSION_MSG)
        next_message = peer1.new_get_next_message_f()

        t = yield from next_message()
        r.append(t)
        peer1.send_msg("tx", tx=TX_LIST[0])

        t = yield from next_message()
        r.append(t)
        peer1.send_msg("notfound", items=[InvItem(ITEM_TYPE_TX, TX_LIST[1].hash())])

        t = yield from next_message()
        r.append(t)
        peer1.send_msg("tx", tx=TX_LIST[2])

        t = yield from next_message()
        r.append(t)
        items = [InvItem(ITEM_TYPE_TX, TX_LIST[3].hash())]
        items.append([InvItem(ITEM_TYPE_TX, TX_LIST[5].hash())])
        peer1.send_msg("notfound", items=items)
        peer1.send_msg("tx", tx=TX_LIST[4])

        return r

    @asyncio.coroutine
    def run_peer2():
        r = []
        yield from standards.initial_handshake(peer2, VERSION_MSG_2)
        tx_fetcher = Fetcher(peer2)

        tx = yield from tx_fetcher.fetch(mi(TX_LIST[0].hash()), timeout=5)
        r.append(tx)

        tx = yield from tx_fetcher.fetch(mi(TX_LIST[1].hash()))
        r.append(tx)

        tx = yield from tx_fetcher.fetch(mi(TX_LIST[2].hash()))
        r.append(tx)

        f1 = asyncio.Task(tx_fetcher.fetch(mi(TX_LIST[3].hash())))
        f2 = asyncio.Task(tx_fetcher.fetch(mi(TX_LIST[4].hash())))
        f3 = asyncio.Task(tx_fetcher.fetch(mi(TX_LIST[5].hash())))
        yield from asyncio.wait([f1, f2, f3])

        r.append(f1.result())
        r.append(f2.result())
        r.append(f3.result())

        return r

    f1 = asyncio.Task(run_peer1())
    f2 = asyncio.Task(run_peer2())

    asyncio.get_event_loop().run_until_complete(asyncio.wait([f1, f2]))

    r = f1.result()
    assert len(r) == 4
    assert r[0] == ("getdata", dict(items=(InvItem(ITEM_TYPE_TX, TX_LIST[0].hash()),)))
    assert r[1] == ("getdata", dict(items=(InvItem(ITEM_TYPE_TX, TX_LIST[1].hash()),)))
    assert r[2] == ("getdata", dict(items=(InvItem(ITEM_TYPE_TX, TX_LIST[2].hash()),)))
    assert r[3] == ("getdata", dict(items=tuple(InvItem(ITEM_TYPE_TX, TX_LIST[i].hash()) for i in range(3, 6))))

    r = f2.result()
    assert len(r) == 6
    assert r[0].hash() == TX_LIST[0].hash()
    assert r[1] == None
    assert r[2].hash() == TX_LIST[2].hash()
    assert r[3] == None
    assert r[4].hash() == TX_LIST[4].hash()
    assert r[5] == None
def test_TxCollector_retry():
    # create some peers
    peer1_2, peer2 = create_handshaked_peers()
    peer1_3, peer3 = create_handshaked_peers(ip1="127.0.0.1", ip2="127.0.0.3")

    TX_LIST = [make_tx(i) for i in range(10)]
    TX_LIST.sort(key=lambda tx: tx.id())

    @asyncio.coroutine
    def run_remote_peer(peer, txs, in_db_count, delay):
        # this peer will immediately advertise the ten transactions
        # But when they are requested, it will only send one,
        # and "notfound" eight.
        yield from asyncio.sleep(delay)
        tx_db = dict((tx.hash(), tx) for tx in txs[:in_db_count])
        r = []

        inv_items = [InvItem(ITEM_TYPE_TX, tx.hash()) for tx in txs]
        peer.send_msg("inv", items=inv_items)

        next_message = peer.new_get_next_message_f()

        while True:
            t = yield from next_message()
            r.append(t)
            if t[0] == "getdata":
                found = []
                not_found = []
                yield from asyncio.sleep(0.1)
                for inv_item in t[1]["items"]:
                    if inv_item.data in tx_db:
                        found.append(tx_db[inv_item.data])
                    else:
                        not_found.append(inv_item)
                if not_found:
                    if len(not_found) == 9:
                        not_found = not_found[:8]
                    peer.send_msg("notfound", items=not_found)
                for tx in found:
                    peer.send_msg("tx", tx=tx)
        return r

    @asyncio.coroutine
    def run_local_peer(peer_list, r):
        inv_collector = InvCollector()
        for peer in peer_list:
            inv_collector.add_peer(peer)
        inv_item_q = inv_collector.new_inv_item_queue()

        @asyncio.coroutine
        def _do_fetch(inv_collector, inv_item, r):
            v = yield from inv_collector.fetch(inv_item, peer_timeout=3.0)
            if v:
                r.append(v)

        # keep a strong reference to these tasks
        tasks = []
        for i in range(10):
            inv_item = yield from inv_item_q.get()
            tasks.append(asyncio.Task(_do_fetch(inv_collector, inv_item, r)))
        while len(r) < 10:
            yield from asyncio.sleep(0.1)
        return r

    f2 = asyncio.Task(run_remote_peer(peer2, TX_LIST, 1, 0.2))
    f3 = asyncio.Task(run_remote_peer(peer3, TX_LIST, 10, 1.0))

    r = []
    f = asyncio.Task(run_local_peer([peer1_2, peer1_3], r))
    done, pending = asyncio.get_event_loop().run_until_complete(asyncio.wait([f], timeout=7.5))

    assert len(done) == 1
    # r = done.pop().result()
    assert len(r) == 10
    assert set(tx.hash() for tx in r) == set(tx.hash() for tx in TX_LIST)
def test_TxCollector_notfound():
    peer1_2, peer2 = create_handshaked_peers()

    TX_LIST = [make_tx(i) for i in range(10)]

    @asyncio.coroutine
    def run_peer_2(peer, txs):
        # this peer will immediately advertise five transactions
        # But when they are requested, it will say they are "notfound".
        # Then it will sleep 0.25 s, then advertise one transaction,
        # then send it when requested.
        next_message = peer.new_get_next_message_f()

        tx_db = dict((tx.hash(), tx) for tx in txs[5:])
        r = []

        inv_items = [InvItem(ITEM_TYPE_TX, tx.hash()) for tx in txs]
        peer.send_msg("inv", items=inv_items)

        while 1:
            t = yield from next_message()
            r.append(t)
            if t[0] == "getdata":
                found = []
                not_found = []
                for inv_item in t[1]["items"]:
                    if inv_item.data in tx_db:
                        found.append(tx_db[inv_item.data])
                    else:
                        not_found.append(inv_item)
                if not_found:
                    peer.send_msg("notfound", items=not_found)
                for tx in found:
                    peer.send_msg("tx", tx=tx)

        return r

    @asyncio.coroutine
    def run_local_peer(peer_list):
        inv_collector = InvCollector()
        for peer in peer_list:
            inv_collector.add_peer(peer)
        r = []
        inv_item_q = inv_collector.new_inv_item_queue()
        while len(r) < 5:
            yield from asyncio.sleep(0.1)
            inv_item = yield from inv_item_q.get()
            try:
                v = yield from asyncio.wait_for(inv_collector.fetch(inv_item), timeout=0.5)
                if v:
                    r.append(v)
            except asyncio.TimeoutError:
                pass
        return r

    f2 = asyncio.Task(run_peer_2(peer2, TX_LIST))

    f = asyncio.Task(run_local_peer([peer1_2]))
    done, pending = asyncio.get_event_loop().run_until_complete(asyncio.wait([f], timeout=7.5))
    r = done.pop().result()
    assert len(r) == 5
    assert [tx.hash() for tx in r] == [tx.hash() for tx in TX_LIST[5:]]
예제 #13
0
def test_fetcher():
    peer1, peer2 = create_peers()

    TX_LIST = [make_tx(i) for i in range(100)]

    from pycoinnet.message import pack_from_data
    msg_data = pack_from_data("tx", tx=TX_LIST[0])

    item1 = [InvItem(1, TX_LIST[0].hash())]
    item2 = [InvItem(1, TX_LIST[i].hash()) for i in range(2)]
    msg_data = pack_from_data("getdata", items=item1)
    msg_data = pack_from_data("getdata", items=item2)
    msg_data = pack_from_data("notfound", items=item1)
    msg_data = pack_from_data("notfound", items=item2)

    @asyncio.coroutine
    def run_peer1():
        r = []

        yield from standards.initial_handshake(peer1, VERSION_MSG)
        next_message = peer1.new_get_next_message_f()

        t = yield from next_message()
        r.append(t)
        peer1.send_msg("tx", tx=TX_LIST[0])

        t = yield from next_message()
        r.append(t)
        peer1.send_msg("notfound",
                       items=[InvItem(ITEM_TYPE_TX, TX_LIST[1].hash())])

        t = yield from next_message()
        r.append(t)
        peer1.send_msg("tx", tx=TX_LIST[2])

        t = yield from next_message()
        r.append(t)
        items = [InvItem(ITEM_TYPE_TX, TX_LIST[3].hash())]
        items.append([InvItem(ITEM_TYPE_TX, TX_LIST[5].hash())])
        peer1.send_msg("notfound", items=items)
        peer1.send_msg("tx", tx=TX_LIST[4])

        return r

    @asyncio.coroutine
    def run_peer2():
        r = []
        yield from standards.initial_handshake(peer2, VERSION_MSG_2)
        tx_fetcher = Fetcher(peer2)

        tx = yield from tx_fetcher.fetch(mi(TX_LIST[0].hash()), timeout=5)
        r.append(tx)

        tx = yield from tx_fetcher.fetch(mi(TX_LIST[1].hash()))
        r.append(tx)

        tx = yield from tx_fetcher.fetch(mi(TX_LIST[2].hash()))
        r.append(tx)

        f1 = asyncio.Task(tx_fetcher.fetch(mi(TX_LIST[3].hash())))
        f2 = asyncio.Task(tx_fetcher.fetch(mi(TX_LIST[4].hash())))
        f3 = asyncio.Task(tx_fetcher.fetch(mi(TX_LIST[5].hash())))
        yield from asyncio.wait([f1, f2, f3])

        r.append(f1.result())
        r.append(f2.result())
        r.append(f3.result())

        return r

    f1 = asyncio.Task(run_peer1())
    f2 = asyncio.Task(run_peer2())

    asyncio.get_event_loop().run_until_complete(asyncio.wait([f1, f2]))

    r = f1.result()
    assert len(r) == 4
    assert r[0] == ('getdata',
                    dict(items=(InvItem(ITEM_TYPE_TX, TX_LIST[0].hash()), )))
    assert r[1] == ('getdata',
                    dict(items=(InvItem(ITEM_TYPE_TX, TX_LIST[1].hash()), )))
    assert r[2] == ('getdata',
                    dict(items=(InvItem(ITEM_TYPE_TX, TX_LIST[2].hash()), )))
    assert r[3] == ('getdata',
                    dict(items=tuple(
                        InvItem(ITEM_TYPE_TX, TX_LIST[i].hash())
                        for i in range(3, 6))))

    r = f2.result()
    assert len(r) == 6
    assert r[0].hash() == TX_LIST[0].hash()
    assert r[1] == None
    assert r[2].hash() == TX_LIST[2].hash()
    assert r[3] == None
    assert r[4].hash() == TX_LIST[4].hash()
    assert r[5] == None