I'm working on a Substrate-based blockchain network. I need to verify if a user with a specific address (e.g., 5XDDFFDF...) has added a node to the network. Depending on the verification, I want to either allow or reject certain actions.
How can I programmatically check if an address has added a node to the network in Substrate?
The account and node are not bound.
To achieve this, you need to develop a pallet that can store this relationship.
When verification is needed, simply read the storage and check if the account exists in it.
By the way, I think you can use the existing pallet at https://github.com/paritytech/polkadot-sdk/blob/cc39edd5a84ce14f5a5bfbf3cb949086d18e2c87/substrate/frame/node-authorization/src/lib.rs#L100-L103. However, it provides more features. If you want something simple, it would be better to implement one yourself.
