Differences

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--- islandsintherift:finance [2020/06/02 22:35] – created sam
+++ islandsintherift:finance [2020/06/02 23:20] – [Allowances] sam
@@ Line 36: / Line 36: @@
 ==== Allowances ====
-Sometimes it's useful to be able to draw an allowance, such as for expenses
+Sometimes it's useful to be able to draw an allowance, such as for expenses, from multiple systems. Rather than moving the entire account, the user has a card with a cryptographically signed script on it, which controls how much can be withdrawn from a generic account. When the user enters the system, they sign on and the bank updates the card to record that it is registered with that system.
+They can then use the card according to the rules on it. For example, they might be allowed to withdraw Cr1,000 a month, so that's what they will be limited to.
+A history of transactions is stored on the card, probably using some form of blockchain. This means you can't withdraw in one system, then go to a second system and withdraw there to avoid any limits - the card knows what you've done and where, and will upload that information to the new bank.