aiohttp.client_exceptions.ClientConnectorCertificateError: Cannot connect to host localhost:58444 ssl:True [SSLCertVerificationError: (1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate signature failure (_ssl.c:1129)')]

[nyxynyx]

Hi, I started a full node (testnet7)

$ chia start node
Daemon not started yet
Starting daemon
chia_full_node: started

got it fully synced and then tried to use FullNodeRpcClient to connect to it to get the blockchain state.

        node_rpc_client = await FullNodeRpcClient.create(
            'localhost', uint16(58444), DEFAULT_ROOT_PATH, config
        )
                
        blockchain_state = await node_rpc_client.get_blockchain_state()

However this gives the error

  File "/home/x/test/test.py", line 55, in start
    blockchain_state = await node_rpc_client.get_blockchain_state()
  File "/opt/anaconda3/envs/chia/lib/python3.9/site-packages/chia/rpc/full_node_rpc_client.py", line 27, in get_blockchain_state
    response = await self.fetch("get_blockchain_state", {})
  File "/opt/anaconda3/envs/chia/lib/python3.9/site-packages/chia/rpc/rpc_client.py", line 41, in fetch
    async with self.session.post(self.url + path, json=request_json, ssl_context=self.ssl_context) as response:
  File "/opt/anaconda3/envs/chia/lib/python3.9/site-packages/aiohttp/client.py", line 1117, in __aenter__
    self._resp = await self._coro
  File "/opt/anaconda3/envs/chia/lib/python3.9/site-packages/aiohttp/client.py", line 520, in _request
    conn = await self._connector.connect(
  File "/opt/anaconda3/envs/chia/lib/python3.9/site-packages/aiohttp/connector.py", line 535, in connect
    proto = await self._create_connection(req, traces, timeout)
  File "/opt/anaconda3/envs/chia/lib/python3.9/site-packages/aiohttp/connector.py", line 892, in _create_connection
    _, proto = await self._create_direct_connection(req, traces, timeout)
  File "/opt/anaconda3/envs/chia/lib/python3.9/site-packages/aiohttp/connector.py", line 1051, in _create_direct_connection
    raise last_exc
  File "/opt/anaconda3/envs/chia/lib/python3.9/site-packages/aiohttp/connector.py", line 1020, in _create_direct_connection
    transp, proto = await self._wrap_create_connection(
  File "/opt/anaconda3/envs/chia/lib/python3.9/site-packages/aiohttp/connector.py", line 971, in _wrap_create_connection
    raise ClientConnectorCertificateError(req.connection_key, exc) from exc
aiohttp.client_exceptions.ClientConnectorCertificateError: Cannot connect to host localhost:58444 ssl:True [SSLCertVerificationError: (1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate signature failure (_ssl.c:1129)')]
ERROR:asyncio:Unclosed client session
client_session: <aiohttp.client.ClientSession object at 0x7f05c9313a60>

Any ideas how to solve the SSL problem?

Using chia 1.1.7.dev0 and ran export CHIA_ROOT="~/.chia/testnet7" before running any of the chia commands and before running the Python code above.

[BrandtH22]

@nyxynyx , since this ticket was opened a number of years ago without further comments it seems this issue has been resolved.
We will be closing this ticket but if we have closed this ticket in error do not hesitate to reach out to us again with any followup questions or comments.

Note - it appears in your code that you are creating a second instance of the full node rpc. You should only need to use post/get requests to get the data. Something like this: https://docs.chia.net/rpc#python

The best place to reach our support team is on Discord (https://discord.gg/chia) or by reopening this ticket.