I know how Bitcoin works, but I am new to Bitcoin development. I want to develop a bitcoin client as a side project for learning purposes, and on reading I came across Bitcoin Core. My question is, are all the currently available wallets and clients built on top of the Bitcoin Core, or is there any other way of building them from scratch?
The answer that you are looking for is yes.
Setting up Bitcoin Core on your local server or remote server that will give you four executable files depending on your system used, it will be bitcoind, bitcoin-cli, bitcoin-tx, and bitcoin-qt and these are the executable files that your client use to interact with the bitcoin network. As an example, you need to create a bitcoin.conf file to accept JSON-RPC commands. Just take not e of the
rpcauth cookie that is needed in the bitcoin.conf file if you do not want to be driven insane trying to find out why you cannot interact with the daemon.
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