Accepting Bitcoin payments: BIP21 URIs and payment QR codes

Andrew Dorokhov schedule 1 min read

A payment QR code encodes a URI as defined in open_in_new BIP 21 :

bitcoin:1GdK9UzpHBzqzX2A9JFP3Di4weBwqgmoQA?
amount=0.015&
label=Bob%27s%20Cafe&
message=Purchase%20at%20Bob%27s%20Cafe

Components:

Part	Example
Bitcoin address	`1GdK9UzpHBzqzX2A9JFP3Di4weBwqgmoQA`
Amount	`0.015`
Label	`Bob's Cafe`
Message	`Purchase at Bob's Cafe`

Unlike a QR that only contains an address, this payment URI includes amount and description so the wallet can prefill a clear payment screen for the user.

code

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