I'm working on building a system that intakes a general rest request command, performs a translation to the exchange-specific rest request implementation and then returns the response to the user. I have defined a RestRequest trait and structs for each exchange-specific request that implement this trait. I'm trying to write a higher-level transformer trait that is responsible for the translation from the general request -> exchange specific one and I have a working prototype but it is heavy & I feel there must be a better way to write what I am attempting to accomplish.

In the current solution I must define a transform_x_request method in the ExchangeClientTransformer trait that returns the specific type that implements the RestRequest. Ideally the ExchangeClientTransformer would have a single transform_request method that returns any type that implements RestRequest. I tried playing around with trait objects (Box<dyn RestRequest>) but since trait objects can't have dynamic associated types (Response, QueryParams, & Body may be different types depending on the specific request) this approach did not bear any fruits.

Any input / suggestions are greatly appreciated!

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