Session Keys | How to tell which node has the session keys for your validator.

First, we will find the next public key associated with our validator. If you have recently changed your session keys then this may not be accurate. Next, we will check a node to see if the private key in the keystore corresponds to the public key for the validator.

Finding a node's next public key:

The output at the bottom is what we are looking for, this will list out each of the different keys. We will then ssh into our node and ask if it has any of these keys. We can do with this a curl command, you will just need to update the params. It will need a public key from above and the type of key it is.

curl http://127.0.0.1:9944 -H "Content-Type:application/json;charset=utf-8" -d   '{
  "jsonrpc":"2.0",
  "id":1,
  "method":"author_hasKey",
  "params": ["0x783134a08ea27221e873043cd0ee52a9f79c2eb14d5cd25afed24d7c82cb2246", "babe"]
}'

This will return a result either true or false, this lets us know if the node has the private keys:

{"jsonrpc":"2.0","result":true,"id":1}

{"jsonrpc":"2.0","result":false,"id":1}

More information on session keys:

https://docs.substrate.io/deploy/keys-and-network-operations/

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