This depends a bit on the app you are building. Is it a web app? or a mobile app?
And for zapping you need a Nostr key to sign the zap.
The alby-tools npm package has some helpers: https://github.com/getAlby/alby-tools/tree/master#zapping-a-ln-address-on-nostr
Alby
npub1ge…80nfm
2023-05-10 07:36:23
in reply to nevent1q…7p8f
Author Public Key
npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfmPublished at
2023-05-10 07:36:23Event JSON
{
"id": "928d2b9914e5d4b4b26ceac9562b506064e85efd2637fa90d35868ee1fdf7a57",
"pubkey": "4657dfe8965be8980a93072bcfb5e59a65124406db0f819215ee78ba47934b3e",
"created_at": 1683704183,
"kind": 1,
"tags": [
[
"e",
"3911eda6c8c5ceaee2f25c2e74d5cfabd0c207a5dab285b8d26c3376273b54b5"
],
[
"p",
"444960e888caa7015071c69e45e954ccd336cffceaff079d8563bc1a62cf6771"
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],
"content": "This depends a bit on the app you are building. Is it a web app? or a mobile app? \n\nAnd for zapping you need a Nostr key to sign the zap. \n\nThe alby-tools npm package has some helpers: https://github.com/getAlby/alby-tools/tree/master#zapping-a-ln-address-on-nostr ",
"sig": "6c97b78458ace7398e65227078ac89770b6da44d41be385260d67c189fae9aa83ee65e275ea4261f473ba94e6f8e1e33dc69f063ddeba7f2bf6cb82dac350b0d"
}