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CH02::Alice pays Bob: remove text about payment completion
Existing text claimed that Alice's unconfirmed transaction completed the payment to Bob, but Bob would be wise to wait for a $750 transaction to confirm. I think this is a problem resulting from a previous edit to the second-edition text where the example was changed from a cup of coffee at a cafe to a laptop. A cup of coffee is cheap and has no resale value, so the chance of fraud is small; a laptop is expensive and has significant resale value, making fraud a greater risk.
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@ -127,7 +127,7 @@ Alice uses her smartphone to scan the barcode on display. Her smartphone
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shows a payment for the correct amount to +Bob's Store+ and she selects Send to
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authorize the payment. Within a few seconds (about the same amount of
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time as a credit card authorization), Bob sees the transaction on the
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register, completing the transaction.
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register.
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In the following sections, we will examine this transaction in more
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detail. We'll see how Alice's wallet constructed it, how it was
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