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I would like some assist understanding a finer level of BIP21 URIs. Is there a required order for the parameters? I am not very skilled with the idea of ABNF grammar, so I am having bother understanding.
For instance, I do know that is legitimate.
bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?quantity=20.3&label=Luke-Jr
And I do know this legitimate:
bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?quantity=20.3&label=Luke-Jr&optionalparam=blahblahblah
However is that this legitimate?
bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W?optionalparam=blahblahblah&quantity=20.3&label=Luke-Jr
Very particularly, should the order of parameters at all times be quantity, label, message, after which elective params? Or is it OK to incorporate elective params earlier than the quantity?
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