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+#+title: BrmInv/BrmBar Rewrite
+
+* Meeting Minutes
+
+** 2025-04-17 - Initial brainsorming
+
+- atendees:
+  - joe
+  - TMA
+  - mrtvolka
+  - specz
+- use-cases
+  - end-user is buying goods for cash
+    - if they are not a member, they can start a "cash transaction" (see below)
+    - if they are a member, they can use their credit account
+      - member can initiate "transaction" (intent to buy one or more items)
+	- selects item, count, more items...
+	- confirms transaction
+    - if there is no stock left, ALERT (to user, weekly reports to rada@?)
+      - perhaps ask the user to perform single-product inventory check
+  - inventory check by administrator
+  - member can credit their account
+  - member can debit their account
+  - inventory stock-in by administrator
+  - upload of receipts
+  - transfer between accounts
+- components
+  - HW & SW: POS
+  - application server
+  - database
+    - reliable HW
+    - off-site on-line replication
+    - application server has only read-only access to tables
+    - all operations are implemented as stored functions which have the rights to modify data
+  - administration
+    - stock-in
+    - inventory check
+- now we need a prototype of the UI
+- database
+  - improvements:
+    - schema version support
+    - add currency trading account to account type type
+  - migrate everything to stored functions
+    - Account.py
+      - 41:create_account
+      - 70:add_barcode
+      - 74:rename
+    - Currency.py
+      - 32:create
+      - 71:update_sell_rate
+      - 73:update_buy_rate
+    - Shop.py
+      - 27:sell
+      - 41:sell_for_cash (only different description)
+      - 55:undo_sale
+      - 69:add_credit
+      - 75:withdraw_credit
+      - 81:transfer_credit
+      - 85:buy_for_cash
+      - 97:receipt_to_credit
+      - 160:fix_inventory
+      - 186:fix_cash
+      - 206:consolidate
+      - 221:undo
+- next steps:
+  - install latest Ubuntu LTS on Raspberry Pi and industrial SD card
+  - migrate postgresql to current version in the distribution
+  - run the original brmbar3 in container and pass pgsql socket to it