# Gavin Andresen
# 2010-08-15 13:08:59
# https://bitcointalk.org/index.php?topic=819.msg9431#msg9431

Your proposal seems needlessly complicated. @p{par}

How about: @p{par}

The vending machine talks to a "Bitcoin+ Payment Verification Systems, Incorporated" server. @p{par}

The Bitcoin+ Payment Verification System is basically just a bitcoin node, with really fast international network connections and a little extra code to detect attempted double-spends.  If it detects a double-spend attempt, it rejects the transaction.  Otherwise, it accepts the transaction and blasts the transaction into the payment network over its really fast, as-low-latency-as-possible connections. @p{par}

If it later turns out that the transaction actually WAS invalid, Bitcoin+ Payment Verification Systems, Incorporated absorbs the cost of the fraud. @p{brk}
Bitcoin+ Payment Verification Systems, Incorporated, of course, charges the vending machine merchant a fee for providing such excellent service.  They're constantly competing with their arch-rivals, "Better Merchant Services, Incorporated" to balance latency, fees, and fraud to maximize profit. @p{brk}