I’m going to provide a few rough thoughts based on murmurings from @kristofer & @ViktorZaunders in this thread. @lynnfoster or others may want to add more info below…
Short version: what you’re proposing (local food buyers clubs and cooperatively run grocery stores) is not only possible with the framework, it’s exactly the sort of use-case we’re designing for. And Holo-REA is ready to be used in that capacity.
We have also done some other prototypes in enterprise environments and have realised that the loosely coupled nature of our modules allows Holo-REA to solve for complex regulatory situations with strict privacy and accountability constraints, without requiring any code customisation or complex deployment. In the end it mostly comes down to app bundles or conductor config files. Eventually we could drive this via network setup wizards / config hApps.
Longer version:
There’s some new stuff in the example directory in our project repo which shows how to extend the core functionality with custom resource attributes or domain-specific knowledge systems. The former is what you need for adding per-resource metadata, the latter for functionality that applies to an entire classification of resources rather than individual items.
We think in at least 98% of use-cases these are the only customisations people will need. The resource attributes generally end up being pushed into related modules (one in particular seems in high demand; but we haven’t yet built a measurement DNA for storing IoT sensor data to be referenced in resource quality inspections). So probably in the majority of cases, it would just be knowledge system extensions.
These are queries like “find me all the types of beef in the supply chain that have an O- blood type”, which yield lists of ResourceSpecifications. You then query on the basis of these specifications to select sets of EconomicResources stored in Holo-REA economic ledger DNAs.
As to the other mixin zomes you’re identifying, yes! We will need those soon as well.
- Group agents
- mutual credit: we would probably do these with
ResourceClassificationsfor currency resources. You can then use the standardEconomicEventAPI to manage increments & decrements, see here.
Not sure what your needs are for these, if you could unpack more that would be interesting!
- group wallets
- shared budgets
- voting
- private transactions: would like to hear more. I think you could do these with private entries & the messaging API. Would also like to see QR codes for offline transactions.
I think upgradability is a core thing, and something I sense a strong need for. Without this, I can’t yet hand off Holochain apps to anyone knowing that their data will be safe moving forward… they need off-ramps to get them to future upgrades and bugfixes…
