Differences

This shows you the differences between two versions of the page.

--- islandsintherift:finance [2020/06/02 22:35] – created sam
+++ islandsintherift:finance [2020/06/02 23:13] – 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the entire account, the user has a card with a cryptographically signed script on it, which controls how much can be withdrawn from a generic account.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.
+Before they leave the system, they 'sign-off' from the bank, and the bank updates the card. Then they can move to a different system and sign on there. If they fail to sign off, then the new system will not recognise them, in order to prevent withdrawing from multiple systems.