async def test_server_version(protocol, writer, method):
params = ["obelisk 42", [SERVER_PROTO_MIN, SERVER_PROTO_MAX]]
expect = {"result": [f"obelisk {VERSION}", SERVER_PROTO_MAX]}
data = await protocol.server_version(writer, {"params": params})
assert_equal(data["result"], expect["result"])
params = ["obelisk", "0.0"]
expect = JsonRPCError.protonotsupported()
data = await protocol.server_version(writer, {"params": params})
assert_equal(data, expect)
params = ["obelisk"]
expect = JsonRPCError.invalidparams()
data = await protocol.server_version(writer, {"params": params})
assert_equal(data, expect)
async def server_version(self, writer, query): # pylint: disable=W0613
"""Method: server.version
Identify the client to the server and negotiate the protocol version.
"""
if "params" not in query or len(query["params"]) != 2:
return JsonRPCError.invalidparams()
client_ver = query["params"][1]
if isinstance(client_ver, list):
client_min, client_max = client_ver[0], client_ver[1]
else:
client_min = client_max = client_ver
version = min(client_max, SERVER_PROTO_MAX)
if version < max(client_min, SERVER_PROTO_MIN):
return JsonRPCError.protonotsupported()
return {"result": [f"obelisk {VERSION}", version]}
