Node infrastructure is a service provider layer for businesses that hold and operate cryptocurrencies assets. The platform-as-a-service provides customers a rich interface to interact with nodes in various crypto networks. 

A non-custodial wallet is a place that offers various financial services while the user owns full custody of the assets by holding the private key. This essay surveys: Functionalities of the non-custodial wallet; Why the user cares about it; Available options provided to the user in existing wallet products; Most importantly, what does/would a best-in-class implementation look like.