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myarbrough@oreilly.com 2014-11-18 05:44:05 -08:00
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@ -28,7 +28,7 @@ image::images/msbt_0201.png["Bitcoin Overview"]
[[cup_of_coffee]]
==== Buying a Cup of Coffee
((("transactions", id="ix_ch02-asciidoc1", range="startofrange")))((("transactions","simple example of", id="ix_ch02-asciidoc2", range="startofrange")))Alice, introduced in the previous chapter, is a new user who has just acquired her first bitcoin. In <<getting_first_bitcoin>>, Alice met with her friend Joe to exchange some cash for bitcoin. The transaction created by Joe funded Alice's wallet with 0.10 BTC. Now Alice will make her first retail transaction, buying a cup of coffee at Bob's coffee shop in Palo Alto, California. Bob's coffee shop recently started accepting bitcoin payments, by adding a bitcoin option to his point-of-sale system. The prices at Bob's Cafe are listed in the local currency (US dollars), but at the register customers have the option of paying in either dollars or bitcoin. Alice places her order for a cup of coffee and Bob enters the transaction at the register. The point-of-sale system will convert the total price from US dollars to bitcoins at the prevailing market rate and display the prices in both currencies, as well as show a QR code containing a _payment request_ for this transaction (see <<payment-request-QR>>):
((("transactions", id="ix_ch02-asciidoc1", range="startofrange")))((("transactions","simple example of", id="ix_ch02-asciidoc2", range="startofrange")))Alice, introduced in the previous chapter, is a new user who has just acquired her first bitcoin. In <<getting_first_bitcoin>>, Alice met with her friend Joe to exchange some cash for bitcoin. The transaction created by Joe funded Alice's wallet with 0.10 BTC. Now Alice will make her first retail transaction, buying a cup of coffee at Bob's coffee shop in Palo Alto, California. Bob's coffee shop recently started accepting bitcoin payments, by adding a bitcoin option to his point-of-sale system. The prices at Bob's Cafe are listed in the local currency (US dollars), but at the register, customers have the option of paying in either dollars or bitcoin. Alice places her order for a cup of coffee and Bob enters the transaction at the register. The point-of-sale system will convert the total price from US dollars to bitcoins at the prevailing market rate and display the prices in both currencies, as well as show a QR code containing a _payment request_ for this transaction (see <<payment-request-QR>>):
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@ -59,7 +59,7 @@ A description for the payment: "Purchase at Bob's Cafe"
[TIP]
====
((("QR codes","payment requests as")))Unlike a QR code that simply contains a destination bitcoin address, a "payment request" is a QR-encoded URL that contains a destination address, a payment amount, and a generic description such as "Bob's Cafe." This allows a bitcoin wallet application to prefill the information used to send the payment while showing a human-readable description to the user. You can scan the QR code with a bitcoin wallet application to see what Alice would see.
((("QR codes","payment requests as")))Unlike a QR code that simply contains a destination bitcoin address, a payment request is a QR-encoded URL that contains a destination address, a payment amount, and a generic description such as "Bob's Cafe." This allows a bitcoin wallet application to prefill the information used to send the payment while showing a human-readable description to the user. You can scan the QR code with a bitcoin wallet application to see what Alice would see.
====
Bob says "That's one-dollar-fifty, or fifteen millibits."