Create a mechanism to describe funding amount in dollars

Right now, it is assumed that every grant is for US$1000, which is used for our calculation on the homepage, and when we discuss things externally. With the increased number of international chapters, as well as some other, unique situations (split grants where 2 grants each receive $500 in a given month, or the proposed kids chapter which will be granting $100 per month), it is important to start capturing exactly how much is being granted by each project.

My proposal is to do a couple of things:

Give each chapter a default currency and amount in that currency (most US chapters would be dollars and 1,000, but a European chapter might be Euros and 1,000)
Every grant will store the currency and amount that it provided, as well as the equivalent amount in dollars (for historical and calculation purposes)
When the grant is marked as a winner, this field will be populated using the most current exchange rate into dollars

I know that this is a fairly US-centric approach, but short of storing all of the exchange rates every time we make a grant, this seems like a reasonable way of capturing that information. I am open to discussion though.

awesomefoundation / awesomebits

Create a mechanism to describe funding amount in dollars #95