Support multiple instances

[sterlu]

Currently, it doesn't seem possible to instantiate the package for multiple networks within the same execution context. I wanted to move the routing packages and logic to the backend and provide a service that routes a swap on a given network/rpc, but I believe re-initing the curve package if 2+ requests come in simultaneously might create an issue. Perhaps it would be better to export the whole class rather that a singleton instance? I understand this would require a refactor since the curve instance is imported directly from the module, but it might be worth considering?

[Macket]

Make sense. Maybe will implement later

[olivbau]

Any news on this issue?
Is there a workaround?