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This is [BIP-21](https://github.com/bitcoin/bips/blob/master/bip-0021.mediawiki). Here's a URI generated by CashApp. ``` bitcoin:BC1QUWMFQ6FZ6C255Z79FE2LULT8FUNW4NRR7KVD8X?amount=0&lightning=LNBC1P3L97YTDQQPP5EN64V8DANNWTG0646WPRGFXJNSDFL7347DAS5YY0JNRST85566FSSP5CDMZVH46KJL4ZTDD0NP79UQUXUKJJSF8HH7V8A7VLLWWTHLDTTJS9QRSGQCQPCXQY8AYQRZJQV06K0M23T593PNGL0JT7N9WZNP64FQNGVCTZ7VTS8NQ4TUKVTLJQZVY7SQQ0NQQQVQQQQQQQQQQQQQQ9GRZJQTSJY9P55GDCEEVP36FVDMRKXQVZFHY8AK2TGC5ZGTJTRA9XLAZ97ZD99YQQ2DGQQ5QQQQQQQQQQQQQQ9GJK9HMURA6R9XAYSCGAXTD35FLZ9RS7TQFN3AZCT3EPHT7UDK8373M57NDSSZR8RMUVKCUWCXCQ2R44MZ5JFCC0L8HTF75NQ7YYZT94GQSCJVPD ``` It's an onchain address, but has the lightning invoice included as parameter. Any wallet that knows how to read the lightning parameter can do so. But otherwise it will be treated as on-chain and the lightning argument will be ignored.