Square POS changes

[kaloudis]

In our initial implementation, we were using Square's Order API which is meant mostly for web payments. When using Square Restaurants, checks are left open and not synced with the API until they are marked paid.

To trigger payment with ZEUS, servers must mark the payment as made with Other Payment Type and apply the note including the text 'Zeus', 'BTC', or 'Bitcoin' (case insensitive).

Tips now are only recorded in ZEUS as we cannot modify an order in the Square API once marked Completed -- which unfortunately is the only state we can send a check to. See

Other changes:

• Users can now set their tip amounts in BTC or sats, if they choose not to denominate in fiat
• Open and Paid orders are now split up
• Tip amounts are now displayed on the paid orders list
• Paid orders return recorded tip amounts and associated TX IDs or payment requests (on-chain v LN)
• Merchant now has the ability to disable tips (helpful if they are applying tip on the Square terminal / adding auto-gratuity)
• Merchants can now set their merchant name to appear in LN memos