Add encoded LNURL support

package.json

@@ -66,6 +66,7 @@
 		"expo-status-bar": "~1.6.0",
 		"expo-updates": "~0.18.17",
 		"i18next": "^23.7.8",
+		"js-lnurl": "^0.6.0",
 		"lottie-react-native": "5.1.6",
 		"nostr-tools": "^1.17.0",
 		"react": "^18.2.0",
@@ -152,7 +153,7 @@
 		"blind-signatures",
 		"lightning-network"
 	],
-	"version": "0.3.0",
+	"version": "0.3.1",
 	"license": "AGPL-3.0-only",
 	"bugs": {
 		"url": "https://github.com/cashubtc/eNuts/issues"

src/screens/Payment/Processing.tsx

@@ -14,7 +14,7 @@ import { addLnPaymentToHistory } from '@store/HistoryStore'
 import { addToHistory, updateLatestHistory } from '@store/latestHistoryEntries'
 import { getDefaultMint } from '@store/mintStore'
 import { globals } from '@styles'
-import { decodeLnInvoice, getInvoiceFromLnurl, isErr, isLnurl, isNum, uniqByIContacts } from '@util'
+import { decodeLnInvoice, getInvoiceFromLnurl, isErr, isLnurlAddress, isNum, uniqByIContacts } from '@util'
 import { autoMintSwap, checkFees, fullAutoMintSwap, getHighestBalMint, payLnInvoice, requestMint, sendToken } from '@wallet'
 import { useEffect, useMemo } from 'react'
 import { useTranslation } from 'react-i18next'
@@ -99,7 +99,7 @@ export default function ProcessingScreen({ navigation, route }: TProcessingPageP
 	const handleMelting = async () => {
 		let invoice = ''
 		// recipient can be a LNURL (address) or a LN invoice
-		if (recipient?.length && isLnurl(recipient)) {
+		if (recipient?.length && isLnurlAddress(recipient)) {
 			try {
 				invoice = await getInvoiceFromLnurl(recipient, +amount)
 				if (!invoice?.length) {

src/screens/Payment/Send/CoinSelection.tsx

@@ -12,7 +12,7 @@ import { useInitialURL } from '@src/context/Linking'
 import { useThemeContext } from '@src/context/Theme'
 import { NS } from '@src/i18n'
 import { globals } from '@styles'
-import { formatInt, formatMintUrl, formatSatStr, getSelectedAmount, isLnurl, isNum } from '@util'
+import { formatInt, formatMintUrl, formatSatStr, getSelectedAmount, isLnurlAddress, isNum } from '@util'
 import { useEffect, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import { ScrollView, View } from 'react-native'
@@ -60,7 +60,7 @@ export default function CoinSelectionScreen({ navigation, route }: TCoinSelectio
 
 	const getRecipient = () => {
 		if (recipient) {
-			return !isLnurl(recipient) ? truncateStr(recipient, 16) : recipient
+			return !isLnurlAddress(recipient) ? truncateStr(recipient, 16) : recipient
 		}
 		const npub = npubEncode(nostr?.contact?.hex ?? '')
 		const receiverName = getNostrUsername(nostr?.contact)

src/screens/Payment/Send/Inputfield.tsx

@@ -10,7 +10,7 @@ import { usePromptContext } from '@src/context/Prompt'
 import { useThemeContext } from '@src/context/Theme'
 import { NS } from '@src/i18n'
 import { globals } from '@styles'
-import { decodeLnInvoice, getStrFromClipboard, isErr, isLnInvoice, isLnurl, openUrl } from '@util'
+import { decodeLnInvoice, getStrFromClipboard, isErr, isLnInvoice, isLnurlAddress, openUrl } from '@util'
 import { checkFees } from '@wallet'
 import { createRef, useEffect, useState } from 'react'
 import { useTranslation } from 'react-i18next'
@@ -43,7 +43,7 @@ export default function InputfieldScreen({ navigation, route }: TMeltInputfieldP
 		if (!clipboard) { return }
 		setInput(clipboard)
 		// pasted LNURL address which does not need decoding
-		if (isLnurl(clipboard)) { return }
+		if (isLnurlAddress(clipboard)) { return }
 		// pasted LN invoice
 		await handleInvoicePaste(clipboard)
 	}
@@ -73,7 +73,7 @@ export default function InputfieldScreen({ navigation, route }: TMeltInputfieldP
 				openPromptAutoClose({ msg: isErr(e) ? e.message : t('deepLinkErr') }))
 		}
 		// user pasted a LNURL, we need to get the amount by the user
-		if (isLnurl(input)) {
+		if (isLnurlAddress(input)) {
 			return navigation.navigate('selectAmount', { mint, balance, isMelt: true, lnurl: input })
 		}
 		// not enough funds

src/screens/QRScan/index.tsx

@@ -14,6 +14,7 @@ import { NS } from '@src/i18n'
 import { getDefaultMint } from '@store/mintStore'
 import { globals, mainColors } from '@styles'
 import { decodeLnInvoice, extractStrFromURL, hasTrustedMint, isCashuToken, isNull, isStr, isUrl } from '@util'
+import { isLnurlEncoded } from '@util/lnurl'
 import { getTokenInfo } from '@wallet/proofs'
 import { BarCodeScanner, PermissionStatus } from 'expo-barcode-scanner'
 import { Camera, FlashMode } from 'expo-camera'
@@ -113,6 +114,11 @@ export default function QRScanPage({ navigation, route }: TQRScanPageProps) {
 		if (isUrl(data) && new URL(data).protocol === 'https:') {
 			return navigation.navigate('mint confirm', { mintUrl: data })
 		}
+		// handle LNURL
+		if (isLnurlEncoded(data)) {
+			// TODO decode and handle lnurl
+			return
+		}
 		// handle LN invoice
 		try {
 			const invoice = extractStrFromURL(data) || data

src/util/index.ts

@@ -164,7 +164,7 @@ export function vib(pattern?: number | number[]) {
 	Vibration.vibrate(pattern)
 }
 
-export function isLnurl(addr: string) {
+export function isLnurlAddress(addr: string) {
 	const [user, host] = addr.split('@')
 	return addr.includes('.')
 		&& addr.split('@').length === 2
@@ -182,7 +182,7 @@ export function hasTrustedMint(uMints: ({ mintUrl: string } | string)[], tMints:
 
 export async function getInvoiceFromLnurl(address: string, amount: number) {
 	try {
-		if (!isLnurl(address)) { throw new Error('invalid address') }
+		if (!isLnurlAddress(address)) { throw new Error('invalid address') }
 		const [user, host] = address.split('@')
 		amount *= 1000
 		const resp = await fetch(`https://${host}/.well-known/lnurlp/${user}`)

src/util/lnurl.ts

@@ -0,0 +1,21 @@
+export function isLnurlEncoded(str: string) {
+	str = str?.trim()
+	const uriPrefixes = [
+		'lightning:',
+		'lightning=',
+		'lightning://',
+		'lnurlp://',
+		'lnurlp=',
+		'lnurlp:',
+		'lnurl:',
+		'lnurl=',
+		'lnurl://',
+	]
+	for (const prefix of uriPrefixes) {
+		if (str?.length && str.startsWith(prefix)) {
+			str = str.slice(prefix.length).trim()
+			break
+		}
+	}
+	return str.toLowerCase().startsWith('lnurl1')
+}