Negative values for account balance about ledger

[jdupas22]

Hey Agallan ! Yes it's possible to have account with negative values, there is a mapping system with some rules you can use to allow this, and soon you'll be able to do apply some rules 'per transaction' if you want to allow overdraft on some accounts !

Here's one example :

You can use the endpoint PUT /mappings
https://docs.formance.com/oss/ledger/reference/api#tag/mapping/operation/updateMapping

with this kind of body :
{ "contracts": [ { "account": "banks:account:*", "expr": { "$or": [ {"$gte": ["$balance", 0]}, {"$lte": ["$balance", 0]}, ] } } ] }

Of course, you hsould update the 'account' value depending of your needs ! Let me know if that answers your question :) And sorry for the delay !

[edwardmp]

@jdupas22 we are interested in this too, do you have an example Numscript that shows how to allow overdrafting on a transaction level? Could not find it in the docs.

[jdupas22]

Hey Edward ! Sorry for the delay ! Yes of course !

send [USD/2 500] (
  source = @foo allowing overdraft up to [USD/2 100]
  destination = @world
)