Asset/Currency as exchange properties

[cxkoda]

Hi again,

I noticed that the asset/currency pair is set as an exchange property. This means that strategies will only be able to trade on one pair and use information respective to that. Was this a conscious design choice?
If not, I would argue that it would be better to let it fall into a strategy's responsibility to decide on what pair to trade, e.g. by initialising a generic strategy with the pair i want it to trade or having a strategy that is optimised for a certain set of (multiple) coins.

Anyway, for now I implemented a quick pair class and pulled the pair dependency out of the exchange, for you to have a look.
Tell me what you think.

Cheers

[nicolasbonnici]

This is a good idea, I used to rewrite this project using PHP8 and Symfony, in this other project I have a Market entity which only contain an exchange reference and the base and quote assets pair to support multi exchange feature.