add withdraw to bolt12, improve checks and naming

Author: riccardobl

api/payingAction/index.js

@@ -1,7 +1,7 @@
 import { LND_PATHFINDING_TIME_PREF_PPM, LND_PATHFINDING_TIMEOUT_MS } from '@/lib/constants'
 import { msatsToSats, satsToMsats, toPositiveBigInt } from '@/lib/format'
 import { Prisma } from '@prisma/client'
-import { payInvoice, parseInvoice } from '@/lib/invoices'
+import { payInvoice, parseInvoice } from '@/lib/boltInvoices'
 
 // paying actions are completely distinct from paid actions
 // and there's only one paying action: send

api/resolvers/wallet.js

@@ -12,7 +12,7 @@ import {
 import { amountSchema, validateSchema, withdrawlSchema, lnAddrSchema } from '@/lib/validate'
 import assertGofacYourself from './ofac'
 import assertApiKeyNotPermitted from './apiKey'
-import { bolt11Info, isBolt11 } from '@/lib/bolt11-info'
+import { bolt11Tags, isBolt11 } from '@/lib/bolt11-tags'
 import { bolt12Info } from '@/lib/bolt12-info'
 import { finalizeHodlInvoice } from '@/worker/wallet'
 import walletDefs from '@/wallets/server'
@@ -24,8 +24,10 @@ import validateWallet from '@/wallets/validate'
 import { canReceive } from '@/wallets/common'
 import performPaidAction from '../paidAction'
 import performPayingAction from '../payingAction'
-import { parseInvoice } from '@/lib/invoices'
+import { parseInvoice } from '@/lib/boltInvoices'
 import lnd from '@/api/lnd'
+import { isBolt12Offer } from '@/lib/bolt12'
+import { fetchBolt12InvoiceFromOffer } from '@/lib/lndk'
 
 function injectResolvers (resolvers) {
   console.group('injected GraphQL resolvers:')
@@ -369,7 +371,7 @@ const resolvers = {
         f = { ...f, ...f.other }
 
         if (f.bolt11) {
-          f.description = isBolt11(f.bolt11) ? bolt11Info(f.bolt11).description : bolt12Info(f.bolt11).description
+          f.description = isBolt11(f.bolt11) ? bolt11Tags(f.bolt11).description : bolt12Info(f.bolt11).description
         }
 
         switch (f.type) {
@@ -481,6 +483,7 @@ const resolvers = {
     },
     createWithdrawl: createWithdrawal,
     sendToLnAddr,
+    sendToBolt12Offer,
     cancelInvoice: async (parent, { hash, hmac }, { models, lnd, boss }) => {
       verifyHmac(hash, hmac)
       await finalizeHodlInvoice({ data: { hash }, lnd, models, boss })
@@ -940,7 +943,7 @@ export async function createWithdrawal (parent, { invoice, maxFee }, { me, model
     throw new GqlInputError('SN cannot pay an invoice that SN is proxying')
   }
 
-  return await performPayingAction({ invoice, maxFee, walletId: wallet?.id }, { me, models, lnd })
+  return await performPayingAction({ bolt11: invoice, maxFee, walletId: wallet?.id }, { me, models, lnd })
 }
 
 export async function sendToLnAddr (parent, { addr, amount, maxFee, comment, ...payer },
@@ -961,6 +964,18 @@ export async function sendToLnAddr (parent, { addr, amount, maxFee, comment, ...
   return await createWithdrawal(parent, { invoice: res.pr, maxFee }, { me, models, lnd, headers })
 }
 
+export async function sendToBolt12Offer (parent, { offer, amountSats, maxFee, comment }, { me, models, lnd, headers }) {
+  if (!me) {
+    throw new GqlAuthenticationError()
+  }
+  assertApiKeyNotPermitted({ me })
+  if (!isBolt12Offer(offer)) {
+    throw new GqlInputError('not a bolt12 offer')
+  }
+  const invoice = await fetchBolt12InvoiceFromOffer({ lnd, offer, msats: satsToMsats(amountSats), description: comment })
+  return await createWithdrawal(parent, { invoice, maxFee }, { me, models, lnd, headers })
+}
+
 export async function fetchLnAddrInvoice (
   { addr, amount, maxFee, comment, ...payer },
   {

api/typeDefs/wallet.js

@@ -78,6 +78,7 @@ const typeDefs = `
     createInvoice(amount: Int!): InvoiceOrDirect!
     createWithdrawl(invoice: String!, maxFee: Int!): Withdrawl!
     sendToLnAddr(addr: String!, amount: Int!, maxFee: Int!, comment: String, identifier: Boolean, name: String, email: String): Withdrawl!
+    sendToBolt12Offer(offer: String!, amountSats: Int!, maxFee: Int!, comment: String): Withdrawl!
     cancelInvoice(hash: String!, hmac: String!): Invoice!
     dropBolt11(hash: String!): Boolean
     removeWallet(id: ID!): Boolean

components/bolt11-info.js

@@ -1,12 +1,12 @@
 import AccordianItem from './accordian-item'
 import { CopyInput } from './form'
-import { bolt11Info, isBolt11 } from '@/lib/bolt11-info'
+import { bolt11Tags, isBolt11 } from '@/lib/bolt11-tags'
 import { bolt12Info } from '@/lib/bolt12-info'
 
 export default ({ bolt11, preimage, children }) => {
   let description, paymentHash
   if (bolt11) {
-    ({ description, payment_hash: paymentHash } = isBolt11(bolt11) ? bolt11Info(bolt11) : bolt12Info(bolt11))
+    ({ description, payment_hash: paymentHash } = isBolt11(bolt11) ? bolt11Tags(bolt11) : bolt12Info(bolt11))
   }
 
   return (

fragments/wallet.js

@@ -121,6 +121,13 @@ export const SEND_TO_LNADDR = gql`
     }
 }`
 
+export const SEND_TO_BOLT12_OFFER = gql`
+  mutation sendToBolt12Offer($offer: String!, $amountSats: Int!, $maxFee: Int!, $comment: String) {
+    sendToBolt12Offer(offer: $offer, amountSats: $amountSats, maxFee: $maxFee, comment: $comment) {
+      id
+    }
+}`
+
 export const REMOVE_WALLET =
 gql`
 mutation removeWallet($id: ID!) {

lib/bech32b12.js

@@ -1,21 +1,24 @@
+// bech32 without the checksum
+//   used for bolt12
+
 const ALPHABET = 'qpzry9x8gf2tvdw0s3jn54khce6mua7l'
 
 export function decode (str) {
+  if (str.length > 2048) throw new Error('input is too long')
   const b5s = []
   for (const char of str) {
     const i = ALPHABET.indexOf(char)
-    if (i === -1) throw new Error('Invalid bech32 character')
+    if (i === -1) throw new Error('invalid bech32 character')
     b5s.push(i)
   }
   const b8s = Buffer.from(converBits(b5s, 5, 8, false))
   return b8s
 }
 
 export function encode (b8s) {
+  if (b8s.length > 2048) throw new Error('input is too long')
   const b5s = converBits(b8s, 8, 5, true)
-  const str = []
-  for (const b5 of b5s) str.push(ALPHABET[b5])
-  return str.join('')
+  return b5s.map(b5 => ALPHABET[b5]).join('')
 }
 
 function converBits (data, frombits, tobits, pad) {

lib/bolt11-info.js renamed to lib/bolt11-tags.js

@@ -4,7 +4,7 @@ export function isBolt11 (request) {
   return request.startsWith('lnbc') || request.startsWith('lntb') || request.startsWith('lntbs') || request.startsWith('lnbcrt')
 }
 
-export function bolt11Info (bolt11) {
+export function bolt11Tags (bolt11) {
   if (!isBolt11(bolt11)) throw new Error('not a bolt11 invoice')
   return decode(bolt11).tagsObject
 }

lib/bolt11.js

@@ -1,8 +1,11 @@
 /* eslint-disable camelcase */
 import { payViaPaymentRequest, parsePaymentRequest } from 'ln-service'
+import { bolt11InvoiceSchema } from './validate'
 
 export function isBolt11 (request) {
-  return request.startsWith('lnbc') || request.startsWith('lntb') || request.startsWith('lntbs') || request.startsWith('lnbcrt')
+  if (!request.startsWith('lnbc') && !request.startsWith('lntb') && !request.startsWith('lntbs') && !request.startsWith('lnbcrt')) return false
+  bolt11InvoiceSchema.validateSync(request)
+  return true
 }
 
 export async function parseBolt11 ({ request }) {

lib/bolt12-info.js

@@ -1,6 +1,10 @@
 import { deserializeTLVStream } from './tlv'
 import * as bech32b12 from '@/lib/bech32b12'
 
+const TYPE_DESCRIPTION = 10n
+const TYPE_PAYER_NOTE = 89n
+const TYPE_PAYMENT_HASH = 168n
+
 export function isBolt12 (invoice) {
   return invoice.startsWith('lni1') || invoice.startsWith('lno1')
 }
@@ -9,20 +13,21 @@ export function bolt12Info (bolt12) {
   if (!isBolt12(bolt12)) throw new Error('not a bolt12 invoice or offer')
   const buf = bech32b12.decode(bolt12.substring(4)/* remove lni1 or lno1 prefix */)
   const tlv = deserializeTLVStream(buf)
-  const INFO_TYPES = {
-    description: 10n,
-    payment_hash: 168n
-  }
+
   const info = {
     description: '',
     payment_hash: ''
   }
+
   for (const { type, value } of tlv) {
-    if (type === INFO_TYPES.description) {
-      info.description = value.toString()
-    } else if (type === INFO_TYPES.payment_hash) {
+    if (type === TYPE_DESCRIPTION) {
+      info.description = value.toString() || info.description
+    } else if (type === TYPE_PAYER_NOTE) {
+      info.description = value.toString() || info.description
+    } else if (type === TYPE_PAYMENT_HASH) {
       info.payment_hash = value.toString('hex')
     }
   }
+
   return info
 }

lib/bolt12.js

@@ -1,13 +1,18 @@
 /* eslint-disable camelcase */
 
 import { payViaBolt12PaymentRequest, parseBolt12Request } from '@/lib/lndk'
+import { bolt12OfferSchema, bolt12InvoiceSchema } from './validate'
 
 export function isBolt12Offer (invoice) {
-  return invoice.startsWith('lno1')
+  if (!invoice.startsWith('lno1')) return false
+  bolt12OfferSchema.validateSync(invoice)
+  return true
 }
 
 export function isBolt12Invoice (invoice) {
-  return invoice.startsWith('lni1')
+  if (!invoice.startsWith('lni1')) return false
+  bolt12InvoiceSchema.validateSync(invoice)
+  return true
 }
 
 export function isBolt12 (invoice) {
@@ -19,7 +24,7 @@ export async function payBolt12 ({ lnd, request: invoice, max_fee }) {
   return await payViaBolt12PaymentRequest({ lnd, request: invoice, max_fee })
 }
 
-export function parseBolt12 ({ lnd, request: invoice }) {
+export async function parseBolt12 ({ lnd, request: invoice }) {
   if (!isBolt12Invoice(invoice)) throw new Error('not a bolt12 request')
-  return parseBolt12Request({ lnd, request: invoice })
+  return await parseBolt12Request({ lnd, request: invoice })
 }