fix(lnd): use route hints from invoice when probing

package.json

@@ -322,6 +322,7 @@
     "bip21": "2.0.3",
     "bip39-en": "1.1.1",
     "bitcoinjs-lib": "5.1.7",
+    "bolt07": "1.5.0",
     "bolt11": "1.2.7",
     "coininfo": "https://github.com/LN-Zap/coininfo#d7ac7be9c9c4ee74dada187f7762a55887a9c6ca",
     "comlinkjs": "3.2.0",

renderer/reducers/payment/utils.js

@@ -1,6 +1,7 @@
 import config from 'config'
 import get from 'lodash/get'
 import cloneDeep from 'lodash/cloneDeep'
+import { chanNumber } from 'bolt07'
 import { getTag, decodePayReq, getNodeAlias, generatePreimage } from '@zap/utils/crypto'
 import { convert } from '@zap/utils/btc'
 import { getIntl } from '@zap/i18n'
@@ -184,12 +185,23 @@ export const prepareBolt11Probe = (payReq, feeLimit) => {
   const invoice = decodePayReq(payReq)
   const { millisatoshis, payeeNodeKey: pubkey } = invoice
 
+  // Extract route hints from the invoice.
+  const routingInfo = getTag(invoice, 'routing_info') || []
+  const hopHints = routingInfo.map(hint => ({
+    nodeId: hint.pubkey,
+    chanId: chanNumber({ id: hint.short_channel_id }).number,
+    feeBaseMsat: hint.fee_base_msat,
+    feeProportionalMillionths: hint.fee_proportional_millionths,
+    cltvExpiryDelta: hint.cltv_expiry_delta,
+  }))
+
   return {
     ...getPaymentConfig(),
     dest: Buffer.from(pubkey, 'hex'),
     feeLimitSat: feeLimit,
     amtMsat: millisatoshis,
     finalCltvDelta: getTag(invoice, 'min_final_cltv_expiry') || DEFAULT_CLTV_DELTA,
+    routeHints: [{ hopHints }],
   }
 }
 

yarn.lock

@@ -4810,6 +4810,11 @@ bluebird@^3.3.5, bluebird@^3.5.0, bluebird@^3.5.5:
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.2.tgz#9f229c15be272454ffa973ace0dbee79a1b0c36f"
   integrity sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==
 
+bn.js@5.1.1:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-5.1.1.tgz#48efc4031a9c4041b9c99c6941d903463ab62eb5"
+  integrity sha512-IUTD/REb78Z2eodka1QZyyEk66pciRcP6Sroka0aI3tG/iwIdYLrBD62RsubR7vqdt3WyX8p4jxeatzmRSphtA==
+
 bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.1.1, bn.js@^4.11.8, bn.js@^4.4.0:
   version "4.11.8"
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.8.tgz#2cde09eb5ee341f484746bb0309b3253b1b1442f"
@@ -4831,6 +4836,13 @@ body-parser@1.19.0:
     raw-body "2.4.0"
     type-is "~1.6.17"
 
+bolt07@1.5.0:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/bolt07/-/bolt07-1.5.0.tgz#4200e574226c7d540a36e6cce42a35c9f4ac0213"
+  integrity sha512-56MzzIej8xP5Ksl+8AwOSMkbFWX9HG3/3qG+2lwxpvkoUQJVUSjyj/JKx+6qaJdarv1XcpNbtGfpixCKIlI+sg==
+  dependencies:
+    bn.js "5.1.1"
+
 bolt11@1.2.7:
   version "1.2.7"
   resolved "https://registry.yarnpkg.com/bolt11/-/bolt11-1.2.7.tgz#75852e215aeb28d6ccd6dd7c721c09d8ccb40a88"