Remote RPC: enable https

[pinheadmz]

Closes #411

Reviewers can test by opening Bob in dev mode in REGTEST and configuring my hosted regtest node as the remote:

protocol: https
host: hns-contributor.dev
path:
Network Type: Regtest
port: 14037
API key: hellogoodbye-whatsmyname-123

There is one stupid hack here because in hsd WalletNode has no option for path so if pathname is set by user, we have to assemble a URL and pass that as the nodeURL option to WalletNode 🤷‍♂️

TODO:

• test with path: I'm having trouble setting up a reverse proxy for this just to test an alternate path
• clean up RPC config modal: the placeholders look like values and you have to re-type to enter data

LONG-TERM TODO: Allow self-signed cert pinning so remote rpc can connect over https without legacy CA

[pinheadmz]

Fun fact about this: since all the parameters are set with network defaults, if the user opens the modal and paste in the Bob Wallet API key and hits save, It will actually test connect to the internal full node, see the connection is valid and then proceed with remote RPC mode, which means shutting the internal node down! Resulting in a no connection error.

[rithvikvibhu]

test with path: I'm having trouble setting up a reverse proxy for this just to test an alternate path

Tried this and the HTTP part works (and Bob passes the RPC test), but websocket says 404 with this nginx config:

nodeclient error Error: Error during WebSocket handshake: Unexpected response code: 404
    at Socket.onError (/media/data/Projects/handshake/bob-wallet/node_modules/bsock/lib/socket.js:245:24)
    at Client.ws.onerror (/media/data/Projects/handshake/bob-wallet/node_modules/bsock/lib/socket.js:174:18)
    at Client.dispatchEvent (/media/data/Projects/handshake/bob-wallet/node_modules/bsock/vendor/faye-websocket.js:3179:30)
    at Client._emitError (/media/data/Projects/handshake/bob-wallet/node_modules/bsock/vendor/faye-websocket.js:3117:10)
    at Client.<anonymous> (/media/data/Projects/handshake/bob-wallet/node_modules/bsock/vendor/faye-websocket.js:2996:10)
    at Client.emit (node:events:402:35)
    at Client.emit (node:domain:475:12)
    at Client._failHandshake (/media/data/Projects/handshake/bob-wallet/node_modules/bsock/vendor/faye-websocket.js:769:10)
    at Client._validateHandshake (/media/data/Projects/handshake/bob-wallet/node_modules/bsock/vendor/faye-websocket.js:781:19)
    at Client.parse (/media/data/Projects/handshake/bob-wallet/node_modules/bsock/vendor/faye-websocket.js:748:10)

Start hsd with:

hsd --network regtest --no-dns --no-wallet --http-host 0.0.0.0 --api-key apikeyhere

nginx config:

server {
    listen 0.0.0.0:14137 ssl;
    listen [::]:14137 ssl;

    server_name hsd-regtest.htools.work;
    ssl_certificate     /etc/letsencrypt/live/hsd-regtest.htools.work/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/hsd-regtest.htools.work/privkey.pem;

    location /custompath/ {
        #rewrite /custompath/(.*) /$1 break;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header HOST $http_host;
        proxy_pass http://127.0.0.1:14037/;
        proxy_redirect off;
    }
}

Will get back to this later, leaving the config and error here.