On the whole, this all seems like a good strategy, and for what I understand of the system, I'm entirely on board. Couple comments:
On 01/23/2014 02:37 PM, Erik Huelsmann wrote:
On Thu, Jan 23, 2014 at 3:48 AM, Chris Travers <..hidden..> wrote:
One new consideration: Bitcoin. I just attended a talk yesterday that really made me see the value of digital currencies in terms of fraud prevention -- compared to credit cards, it's a much, much better deal and far less risky for merchants. But its value, obviously, fluctuates dramatically at any time.1. We need to be able to handle arbitrary two-currency or even three currency transactions. For example, if one has one's books in USD and transferring money from a GBP to an EUR account, this must be supported.Right. What's more, I'd like the design (although possibly not the immediate implementation) to allow for assets to be held in non-base currencies. E.g. to hold a USD current account in a company which is EUR based. Part of this requirement is the need to be able to revalue the asset -- report it as having a different current value than the value that it had when the posting was originally created.
2. We need to be able to handle per-transaction exchangerates.Right. I'd say that we need a per-date default exchange-rate as well -- one that's picked up if no other exchange rate is specified.To me, this requirement solves the following use-cases:- different banks (or bank and credit card) with different exchange rates for the same currencies on the same date- FX transaction reversal of a transaction in a closed period with a currency different from the current default
At least being able to store and report on accounts stored in BTC would be an easy way to become an early accounting system with support for it... then we could add a digital wallet support later as an add-on or something... See some of my thoughts here: http://www.freelock.com/blog/john-locke/2014-01/bitcoin-future-e-commerceNot sure I agree with this one. If we make the web service interface essentially extend an ORM to http, we can use http requests for testing. It's pretty easy to put together a generic test harness that would allow us to test requests and responses, aside from any UI issues. By "functional" do you mean functions in the database, or functional forms for user input? If the first, ok. If the last, I would like to see the REST interface use exactly the same code as the form handlers -- the form handlers just providing an HTML client layer that shares the same business logic.
* A functional interface (before a webservice interface), so we get per posting/transaction integrity checks in place
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