45 lines
1.3 KiB
JavaScript
45 lines
1.3 KiB
JavaScript
import { createHash } from 'crypto'
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import { bech32 } from 'bech32'
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import { lnAddrSchema } from './validate'
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export function encodeLNUrl (url) {
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const words = bech32.toWords(Buffer.from(url.toString(), 'utf8'))
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return bech32.encode('lnurl', words, 1023)
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}
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export function lnurlPayMetadataString (username) {
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return JSON.stringify([[
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'text/plain',
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`Funding @${username} on stacker.news`
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], [
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'text/identifier',
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`${username}@stacker.news`
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]])
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}
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export function lnurlPayDescriptionHashForUser (username) {
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return lnurlPayDescriptionHash(lnurlPayMetadataString(username))
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}
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export function lnurlPayDescriptionHash (data) {
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return createHash('sha256').update(data).digest('hex')
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}
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export async function lnAddrOptions (addr) {
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await lnAddrSchema().fields.addr.validate(addr)
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const [name, domain] = addr.split('@')
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let protocol = 'https'
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if (process.env.NODE_ENV === 'development') {
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// support HTTP and HTTPS during development
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protocol = process.env.PUBLIC_URL.split('://')[0]
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}
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const req = await fetch(`${protocol}://${domain}/.well-known/lnurlp/${name}`)
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const res = await req.json()
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if (res.status === 'ERROR') {
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throw new Error(res.reason)
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}
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const { minSendable, maxSendable, ...leftOver } = res
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return { min: minSendable / 1000, max: maxSendable / 1000, ...leftOver }
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}
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