Invoices README

invoice/README.md

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+# LNP/BP Invoice Library
+
+Library providing functionality for doing universal invoices covering Bitcoin,
+Lightning Network and RGB (on-chain and LN) according to LNPBP-38 standard.
+Supports address-, UTXO-, channel-, miniscript-descriptor- and PSBT-based
+invoices with such features as:
+- Paying arbitrary amounts (donations etc)
+- Recurrent payments
+- Per-item prices with multiple item orders
+- Expiration dates
+- Currency exchange rate requirements
+- Extended information about merchants, invoice details etc
+- Optional merchant signatures
+
+Read more on this invoices in 
+[slides](https://github.com/LNP-BP/FAQ/blob/master/Presentation%20slides/Universal%20LNP-BP%20invoices.pdf) 
+or watch [YouTube recording](https://www.youtube.com/watch?v=R1QudCywRGk) of one
+of LNP/BP Association development calls discussing universal invoices.