feat: zap (#107)

src/lib/lightning.ts

@@ -0,0 +1,32 @@
+import { TProfile } from '@/types'
+import { Invoice } from '@getalby/lightning-tools'
+import { isEmail } from './common'
+
+export function getAmountFromInvoice(invoice: string): number {
+  const _invoice = new Invoice({ pr: invoice }) // TODO: need to validate
+  return _invoice.satoshi
+}
+
+export function formatAmount(amount: number) {
+  if (amount < 1000) return amount
+  if (amount < 1000000) return `${Math.round(amount / 100) / 10}k`
+  return `${Math.round(amount / 100000) / 10}M`
+}
+
+export function getLightningAddressFromProfile(profile: TProfile) {
+  // Some clients have incorrectly filled in the positions for lud06 and lud16
+  const { lud16: a, lud06: b } = profile
+  let lud16: string | undefined
+  let lud06: string | undefined
+  if (a && isEmail(a)) {
+    lud16 = a
+  } else if (b && isEmail(b)) {
+    lud16 = b
+  } else if (b && b.startsWith('lnurl')) {
+    lud06 = b
+  } else if (a && a.startsWith('lnurl')) {
+    lud06 = a
+  }
+
+  return lud16 || lud06 || undefined
+}