Unable to build mobile (android) library

[yzernik]

Background

I am trying to build the Lndmobile.aar file to use in my Android app. I tried to follow the instructions here: https://github.com/lightningnetwork/lnd/blob/master/mobile/README.md

I was able to run the "make android" command, and it exited with exit code 0. It generated the files in /root/go/src/github.com/lightningnetwork/lnd/mobile/. The Lndmobile.aar and Lndmobile-sources.jar are both created.

The Start method of Lndmobile is missing. It shows a comment in it's place:

// Code generated by gobind. DO NOT EDIT.

// Java class lndmobile.Lndmobile is a proxy for talking to a Go program.
//
//   autogenerated by gobind -lang=java github.com/lightningnetwork/lnd/mobile
package lndmobile;

import go.Seq;

public abstract class Lndmobile {
	static {
		Seq.touch(); // for loading the native library
		_init();
	}
	
	private Lndmobile() {} // uninstantiable
	
	// touch is called from other bound packages to initialize this package
	public static void touch() {}
	
	private static native void _init();
	
	
	
	// skipped function Start with unsupported parameter or return types
	
}

Your environment

• version of lnd: v0.10.1-beta
• which operating system (uname -a on *Nix): ubuntu:20.04
• version of btcd, bitcoind, or other backend: None
• any other relevant environment details: I was able to run "make android" directly on my host machine, and in a Docker container. I got the same output for both.

Steps to reproduce

https://github.com/yzernik/lnd-mobile-docker

Expected behaviour

The Lndmobile.aar file should be generated correctly. When I import it into Android Studio, I should be able to call the "Start" method:

Lndmobile.start("--bitcoin.active --bitcoin.node=neutrino --bitcoin.testnet --no-macaroons", new StartCallback());

Actual behaviour

The Lndmobile.aar file is not generated correctly. When I import it into Android Studio, I am unable to call the "Start" method, because the "Start" method does not exist.

[cfromknecht]

@yzernik there has been some recent shuffling around the entry point for lnd, are you able to find the most recent version for which things do compile, e.g. 0.10?

[halseth]

Doesnt compile:

/src/github.com/lightningnetwork/lnd/mobile/bindings.go:70:21: not enough arguments in call to lnd.Main
	have (lnd.ListenerCfg)
	want (*lnd.Config, lnd.ListenerCfg, <-chan struct {})
/src/github.com/lightningnetwork/lnd/mobile/bindings.go:87:45: not enough arguments in call to lnd.WalletUnlockerAuthOptions
	have ()
	want (*lnd.Config)

[guggero]

The changes mentioned above were introduced in master and v0.10.2 (which is still in RC at this moment).
@yzernik if you go back to lnd v0.10.0-beta it should compile. We will fix the mobile code to be compatible with v0.11.0 once it's out.