[BUG] CERTIFICATE_VERIFY_FAILED for GET /pool_info

[yshklarov]

Describe the bug

After adding a plot NFT, the pool info cannot be obtained. Errors of this sort appear in debug.log once per minute:

2021-07-09T02:10:40.203 farmer chia.farmer.farmer : ERROR Exception in GET /pool_info https://na1.pool.space, Cannot connect to host na1.pool.space:443 ssl:True [SSLCertVerificationError: (1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1131)')]

Moreover, the difficulty and authentication_token_timeout for the plot fail to be set (warnings spam debug.log.)

To Reproduce

Steps to reproduce the behavior:

1. Either add a plot NFT in the GUI client, or chia plotnft create -s pool -u <pool>.
2. If added in the GUI client, errors will begin to appear in debug.log. If added from the command line, the error will be visible immediately.

Desktop

• OS: linux
• OS Version/Flavor: arch linux, fully up to date
• Chia version: 1.2.0, from the unofficial AUR package.

Proposed solution

In _pool_get_pool_info(), pass a custom SSL context to aiohttp.ClientSession, as is done in fetch() in server.py.

Apologies, but I'm unable to build the source so I can't test this. But I'm guessing it ought to be done regardless (why else is mozilla-ca in the source tree?)

[yshklarov]

Oops, this is actually a duplicate of #7273.