Use AMP invoices if you run LND. So you can create a reusable invoice with a fix amount.

Also as ek mentioned, you can use LNURL with a fix amount too. In LNbits create paylinks for that. You can use these extensions:

Stacker Saloon

saloon

Use AMP invoices if you run LND. So you can create a reusable invoice with a fix amount.

https://docs.lightning.engineering/lightning-network-tools/lnd/amp

Also as ek mentioned, you can use LNURL with a fix amount too. In LNbits create paylinks for that. You can use these extensions:
- https://extensions.lnbits.com/lnurlp
- https://extensions.lnbits.com/satspay
- https://extensions.lnbits.com/offlineshop

![](https://m.stacker.news/84481)