A simple C library for sending messages over the lightning network

Overview
lnsocket
========

A simple C library for sending messages over the lightning network

Work in progress!

Thanks to Rusty and the clightning project for much of this code, I have
adapted it to be more library friendly. I've removed references to tal, Rusty's
hierarchical allocator. The library only allocates once and uses that chunk of
memory for all operations.


Motivation
----------

I wanted a way to send custom messages to my lightning node, such as RPC.
Building this as a simple C library will allow you to speak the lightning
network in native applications, like on mobile. I have not tested this on iOS
yet but that is planned and is the motivating use case.


Dependencies
------------

You'll need libtool/autoconf/automake for the libsodium/secp256k1 submodules,
but otherwise there are no dependencies


Building
--------

make


Examples
--------

* See test.c for a ping/pong example

* See rpc.c for an RPC example

Contributing
------------

Send patches to [email protected]:

$ git config format.subjectPrefix 'PATCH lnsocket'
$ git config sendemail.to 'William Casarin 
  '
$ git send-email --annotate HEAD^

See 
  https://git-send-email.io/ for configuring your mailer

 
Comments
  • Websockets not connecting

    Websockets not connecting

    Hey, I have tried connecting to my node in the browser via WebSocket and it refuses to connect for some reason. It works great via Node JS, but not in the browser.

    I have also tried using lnlink and I get the same error. Is there anything special that needs to be done with port forwarding for the WS connection to work?

    opened by aaronbarnardsound 10
  • make js: emcc error

    make js: emcc error

    $ make js
    ...
    emcc --pre-js lnsocket_pre.js -s ENVIRONMENT=web -s MODULARIZE -flto -s 'EXPORTED_FUNCTIONS=["_malloc", "_free"]' -s EXPORTED_RUNTIME_METHODS=ccall,cwrap -Wall -Os -Ideps/secp256k1/include -Ideps/libsodium/src/libsodium/include -Ideps -Wl,-whole-archive target/js/libsecp256k1.a target/js/libsodium.a target/js/lnsocket.a -Wl,-no-whole-archive -o target/tmp/js/lnsocket.js
    emcc: error: setting `EXPORTED_RUNTIME_METHODS` expects `<class 'list'>` but got `<class 'str'>`
    make: *** [Makefile:203: target/tmp/js/lnsocket.js] Error 1
    
    opened by jsarenik 3
  • add tor proxy support to connect on onion endpoint

    add tor proxy support to connect on onion endpoint

    Add tor proxy support to connect on clightning node through onion endpoint.

    For test with tor, pass tor socks5 istance on lnrpc.c:

    	if (!(ok = lnsocket_connect(ln, nodeid, host, "127.0.0.1:9050")))
    		goto done;
    
    opened by lvaccaro 2
  • Add rust bindings

    Add rust bindings

    Use bindgen to add rust bindings at lnsocket C library.

    Generate rust bindings and target library with:

    make rust
    

    In rust/lib.rs, I open a demo socket connection to my experimental local node.

    I am not a rust expert, so I open MR for feedbacks.

    NOTE: on arm64 platform, the code failed to compile: it expects a *mut u8 instead *mut i8 on CStr::from_ptr().

    opened by lvaccaro 2
  • cannot open output file test: Is a directory

    cannot open output file test: Is a directory

    $ make
    ...
    cc test.o
    cc   test.o   -o test
    /usr/bin/ld: cannot open output file test: Is a directory
    collect2: error: ld returned 1 exit status
    make: *** [<builtin>: test] Error 1
    
    opened by jsarenik 2
  • getting a build error running `make`

    getting a build error running `make`

    ld test
    cc -Wall -Os -Ideps/secp256k1/include -Ideps/libsodium/src/libsodium/include -Ideps test.o sha256.o hkdf.o hmac.o sha512.o lnsocket.o error.o handshake.o crypto.o bigsize.o commando.o bech32.o libsecp256k1.a libsodium.a lnsocket.a  -o test
    /usr/bin/ld: handshake.o: in function `lnsocket_act_two':
    handshake.c:(.text+0x3c3): undefined reference to `secp256k1_ecdh'
    /usr/bin/ld: handshake.c:(.text+0x53a): undefined reference to `secp256k1_ecdh'
    /usr/bin/ld: handshake.o: in function `act_one_initiator_prep':
    handshake.c:(.text+0x6dc): undefined reference to `secp256k1_ecdh'
    collect2: error: ld returned 1 exit status
    make: *** [Makefile:170: test] Error 1
    
    opened by niftynei 2
  • rust: fix library build inside cargo command

    rust: fix library build inside cargo command

    Updates to build lnsocket library through cargo and archive it in a rust package.

    Tested on https://github.com/lvaccaro/btctipserver/blob/62aaddac37b0a7ee4a18d6e90e7276e2f6351440/Cargo.toml#L31

    opened by lvaccaro 1
  • Pure JS client

    Pure JS client

    @ShahanaFarooqui wrote a pure-js commando client here: https://github.com/ShahanaFarooqui/CLN-Commando-Client

    I should just switch to that instead of using the C wasm build.

    opened by jb55 1
  • Decrypt Error

    Decrypt Error

    When sending multiple RPC requests at once I get the following errors:

    Screen Shot 2022-07-27 at 8 38 06 pm

    When the requests are made separately waiting for each one to complete they all work perfectly, but when fired off at the same time the above error occurs.

    I could just wait for each request to receive a response before sending the next one except in the case of long running requests such as waitinvoice which would block other requests for long periods, so it would be nice to be able to send requests in parallel if possible.

    opened by aaronbarnardsound 6
  • Static Key

    Static Key

    Is it possible to have a static public key so that the remote node can limit the rune to that key? Or does a new key need to be created every time it is initialised with the gen_key method?

    opened by aaronbarnardsound 11
Releases(v0.3.2)
Owner
William Casarin
William Casarin
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