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I want to automate the sell process of NFTs. It seems to me that the only backend wallet available right now is cardano-wallet. To run cardano-wallet I need to install cardano-node. If you investigate about cardano-node you always read about stake pools which seem to need 3 servers.
If I only want to use cardano-wallet for the purpose mentioned above (no stake pool) do I need 3 servers too?
You can run everything on one server. You can run cardano-node in the background and use cardano-wallet or cardano-cli from your application (just export the CARDANO_NODE_SOCKET_PATH environment variable to the node socket path).
You can run cardano-node in the background either as deamon or you can use something like docker to do it.
