CP-8525: Improve Android performance (polyfill promise with es6-promi…

…se) (#1293)

packages/core-mobile/app/services/sentry/SentryService.ts

@@ -16,6 +16,10 @@ const isAvailable =
 const init = (): void => {
   if (isAvailable) {
     Sentry.init({
+      // disabling promise patching since it is affecting app performance
+      // instead, we are patching promise ourselves with es6-promise
+      // TODO: renable patchGlobalPromise here https://ava-labs.atlassian.net/browse/CP-8616
+      patchGlobalPromise: false,
       dsn: Config.SENTRY_DSN,
       environment: Config.ENVIRONMENT,
       debug: false,

packages/core-mobile/package.json

@@ -92,6 +92,7 @@
     "crypto-browserify": "3.12.0",
     "date-fns": "2.28.0",
     "deprecated-react-native-prop-types": "2.3.0",
+    "es6-promise": "4.2.8",
     "eth-rpc-errors": "4.0.3",
     "ethers": "6.8.1",
     "events": "3.3.0",

packages/core-mobile/polyfills/index.js

@@ -1,3 +1,4 @@
+import './promise'
 import 'react-native-gesture-handler'
 import 'react-native-quick-crypto' // to override the global.crypto object
 import '@walletconnect/react-native-compat'

packages/core-mobile/polyfills/promise.js

@@ -0,0 +1,27 @@
+// there seems to be a performance issue with React Native's promise so we are polyfilling it with es6-promise
+// TODO: remove this polyfill and use bridgeless mode https://ava-labs.atlassian.net/browse/CP-8616
+const {
+  polyfillGlobal
+} = require('react-native/Libraries/Utilities/PolyfillFunctions')
+
+const Promise = require('es6-promise').Promise
+
+// es6-promise doesn't have allSettled by default
+Promise.allSettled =
+  Promise.allSettled ||
+  (promises =>
+    Promise.all(
+      promises.map(p =>
+        p
+          .then(value => ({
+            status: 'fulfilled',
+            value
+          }))
+          .catch(reason => ({
+            status: 'rejected',
+            reason
+          }))
+      )
+    ))
+
+polyfillGlobal('Promise', () => Promise)

yarn.lock

@@ -205,6 +205,7 @@ __metadata:
     date-fns: 2.28.0
     deprecated-react-native-prop-types: 2.3.0
     detox: 20.13.5
+    es6-promise: 4.2.8
     eslint: 8.50.0
     eslint-plugin-avalabs-mobile: "workspace:*"
     eth-rpc-errors: 4.0.3
@@ -12435,7 +12436,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"es6-promise@npm:^4.2.8":
+"es6-promise@npm:4.2.8, es6-promise@npm:^4.2.8":
   version: 4.2.8
   resolution: "es6-promise@npm:4.2.8"
   checksum: 95614a88873611cb9165a85d36afa7268af5c03a378b35ca7bda9508e1d4f1f6f19a788d4bc755b3fd37c8ebba40782018e02034564ff24c9d6fa37e959ad57d