py-libp2p/tests/utils.py

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from contextlib import suppress
import asyncio
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import multiaddr
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from libp2p import new_node
async def cleanup():
pending = asyncio.all_tasks()
for task in pending:
task.cancel()
# Now we should await task to execute it's cancellation.
# Cancelled task raises asyncio.CancelledError that we can suppress:
with suppress(asyncio.CancelledError):
await task
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async def set_up_nodes_by_transport_opt(transport_opt_list):
nodes_list = []
for transport_opt in transport_opt_list:
node = await new_node(transport_opt=transport_opt)
await node.get_network().listen(multiaddr.Multiaddr(transport_opt[0]))
nodes_list.append(node)
return tuple(nodes_list)
async def echo_stream_handler(stream):
while True:
read_string = (await stream.read()).decode()
resp = "ack:" + read_string
await stream.write(resp.encode())
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async def perform_two_host_set_up_custom_handler(handler):
transport_opt_list = [["/ip4/127.0.0.1/tcp/0"], ["/ip4/127.0.0.1/tcp/0"]]
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(node_a, node_b) = await set_up_nodes_by_transport_opt(transport_opt_list)
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node_b.set_stream_handler("/echo/1.0.0", handler)
# Associate the peer with local ip address (see default parameters of Libp2p())
node_a.get_peerstore().add_addrs(node_b.get_id(), node_b.get_addrs(), 10)
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return node_a, node_b