72 lines
1.6 KiB
TypeScript
72 lines
1.6 KiB
TypeScript
import type { Event } from 'nostr-tools'
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import { SimplePool } from 'nostr-tools'
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const RELAY_URL = process.env.NEXT_PUBLIC_NOSTR_RELAY_URL || 'wss://relay.damus.io'
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/**
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* Check if user has paid for an article by looking for zap receipts
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*/
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export async function checkZapReceipt(
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pool: SimplePool,
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targetPubkey: string,
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targetEventId: string,
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amount: number,
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userPubkey: string
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): Promise<boolean> {
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if (!pool) {
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return false
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}
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return new Promise((resolve) => {
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const filters = [
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{
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kinds: [9735], // Zap receipt
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'#p': [targetPubkey],
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'#e': [targetEventId],
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authors: [userPubkey], // Filter by the payer's pubkey
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},
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]
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let resolved = false
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const sub = pool.sub([RELAY_URL], filters)
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sub.on('event', async (event: Event) => {
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if (resolved) return
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// Import verification service dynamically to avoid circular dependencies
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const { zapVerificationService } = await import('./zapVerification')
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// Verify the zap receipt signature and details
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const isValid = zapVerificationService.verifyZapReceiptForArticle(
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event,
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targetEventId,
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targetPubkey,
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userPubkey,
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amount
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)
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if (isValid) {
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resolved = true
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sub.unsub()
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resolve(true)
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}
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})
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sub.on('eose', () => {
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if (!resolved) {
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resolved = true
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sub.unsub()
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resolve(false)
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}
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})
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setTimeout(() => {
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if (!resolved) {
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resolved = true
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sub.unsub()
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resolve(false)
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}
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}, 3000)
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})
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}
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