lnd backend implementation for iOS

This commit adds an lnd ("LndMobile") backend for the iOS build.
It supports all lnd RPC calls the wallet uses, however it's currently
missing some native module functions (src/lndmobile/LndMobile.d.ts specify these).

Scheduled sync job is not included in this iteration.

.gitignore

@@ -73,3 +73,7 @@ google-services.json
 
 # iOS
 /ios/Pods
+
+# Lnd binaries
+android/lndmobile/Lndmobile.aar
+ios/Lndmobile.framework

README.md

@@ -22,7 +22,7 @@ powered by lnd and Neutrino SPV.
 - [x] Scheduled sync of chain background job
 - [x] Local channel backup
 - [x] [LNURL](https://github.com/btcontract/lnurl-rfc) support (all sub-protocols: pay, channel, auth and withdraw)
-- [x] Channel backup to Google Drive
+- [x] Channel backup to Google Drive (Android) and iCloud (iOS)
 - [x] [WebLN](https://webln.dev/) browser
 - [x] Support for [Multi-Part Payments (MPP)](https://lightning.engineering/posts/2020-05-07-mpp/)
 - [x] Integrated Tor support
@@ -57,11 +57,12 @@ To start the application:
 
 ### iOS
 
-_The iPhone/iOS version is still work in progress and is not yet stable nor fully working._
+_The iPhone/iOS version is still work in progress._
 
 To build the iOS version, macOS is required. You also need an Apple Developer account, although you do not need to be enrolled in the Developer Program.
 
 - Install [XCode](https://developer.apple.com/xcode/), [Node](https://nodejs.org) and [Yarn](https://classic.yarnpkg.com/)
+- Build lnd for iOS by following the steps in [build-ios-framework.md](build-ios-framework.md)
 - Install Node packages: `yarn`
 - Generate proto files: `yarn gen-proto`
 - Install CocoaPods libs: `cd ios && pod install`
@@ -74,7 +75,7 @@ To build the iOS version, macOS is required. You also need an Apple Developer ac
 
 To start the application:
 - Run: `yarn start-metro`
-- Run: `yarn ios:mainnet-fakelnd-debug`
+- Run: `yarn ios:mainnet-debug --device "<your device name>"` or build from XCode
 
 ## Commit and Code-Style