lnsocket

A minimal C library for connecting to the lightning network
git clone git://jb55.com/lnsocket
Log | Files | Refs | Submodules | README | LICENSE

commit f78d736727aae7a7a9d2e2946fbe67f90f1a96e8
parent 6babf06527f7c819c4c43964a28c7c82c471a9dc
Author: William Casarin <jb55@jb55.com>
Date:   Tue, 22 Mar 2022 12:31:14 -0700

distribute web build

Signed-off-by: William Casarin <jb55@jb55.com>

Diffstat:
MMakefile | 4++++
MREADME.md | 2++
Adist/js/lnsocket.js | 391+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Adist/js/lnsocket.wasm | 0
4 files changed, 397 insertions(+), 0 deletions(-)

diff --git a/Makefile b/Makefile @@ -167,6 +167,10 @@ dist-node: node @mkdir -p dist/node cp target/node/lnsocket.wasm target/node/lnsocket.js dist/node +dist-js: js + @mkdir -p dist/js + cp target/js/lnsocket.wasm target/js/lnsocket.js dist/js + install-all: install install-js check: test diff --git a/README.md b/README.md @@ -35,6 +35,8 @@ This will build `lnsocket.a`, `libsodium.a` and `libsecp256k1.a` under ### WASM/JS/Web +There are packaged versions of the js build under [dist/js](dist/js) + $ make js This will build `lnsocket.js` and `lnsocket.wasm` in `target/js` so that you diff --git a/dist/js/lnsocket.js b/dist/js/lnsocket.js @@ -0,0 +1,391 @@ + +var Module = (() => { + var _scriptDir = typeof document !== 'undefined' && document.currentScript ? document.currentScript.src : undefined; + + return ( +function(Module) { + Module = Module || {}; + +var Module=typeof Module!="undefined"?Module:{};var readyPromiseResolve,readyPromiseReject;Module["ready"]=new Promise(function(resolve,reject){readyPromiseResolve=resolve;readyPromiseReject=reject});Module.getRandomValue=function(){const window_="object"===typeof window?window:this;const crypto_=typeof window_.crypto!=="undefined"?window_.crypto:window_.msCrypto;let randomBytesNode;if(!crypto_){randomBytesNode=require("crypto").randomBytes;fn=randomValuesNode}else{fn=randomValuesStandard}function randomValuesNode(){return randomBytesNode(1)[0]>>>0}function randomValuesStandard(){var buf=new Uint32Array(1);crypto_.getRandomValues(buf);return buf[0]>>>0}return fn}();var moduleOverrides=Object.assign({},Module);var arguments_=[];var thisProgram="./this.program";var quit_=(status,toThrow)=>{throw toThrow};var ENVIRONMENT_IS_WEB=true;var ENVIRONMENT_IS_WORKER=false;var scriptDirectory="";function locateFile(path){if(Module["locateFile"]){return Module["locateFile"](path,scriptDirectory)}return scriptDirectory+path}var read_,readAsync,readBinary,setWindowTitle;if(ENVIRONMENT_IS_WEB||ENVIRONMENT_IS_WORKER){if(ENVIRONMENT_IS_WORKER){scriptDirectory=self.location.href}else if(typeof document!="undefined"&&document.currentScript){scriptDirectory=document.currentScript.src}if(_scriptDir){scriptDirectory=_scriptDir}if(scriptDirectory.indexOf("blob:")!==0){scriptDirectory=scriptDirectory.substr(0,scriptDirectory.replace(/[?#].*/,"").lastIndexOf("/")+1)}else{scriptDirectory=""}{read_=(url=>{var xhr=new XMLHttpRequest;xhr.open("GET",url,false);xhr.send(null);return xhr.responseText});if(ENVIRONMENT_IS_WORKER){readBinary=(url=>{var xhr=new XMLHttpRequest;xhr.open("GET",url,false);xhr.responseType="arraybuffer";xhr.send(null);return new Uint8Array(xhr.response)})}readAsync=((url,onload,onerror)=>{var xhr=new 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Build with -s ASSERTIONS=1 for more info.";var e=new WebAssembly.RuntimeError(what);readyPromiseReject(e);throw e}var dataURIPrefix="data:application/octet-stream;base64,";function isDataURI(filename){return filename.startsWith(dataURIPrefix)}var wasmBinaryFile;wasmBinaryFile="lnsocket.wasm";if(!isDataURI(wasmBinaryFile)){wasmBinaryFile=locateFile(wasmBinaryFile)}function getBinary(file){try{if(file==wasmBinaryFile&&wasmBinary){return new Uint8Array(wasmBinary)}if(readBinary){return readBinary(file)}else{throw"both async and sync fetching of the wasm failed"}}catch(err){abort(err)}}function getBinaryPromise(){if(!wasmBinary&&(ENVIRONMENT_IS_WEB||ENVIRONMENT_IS_WORKER)){if(typeof fetch=="function"){return fetch(wasmBinaryFile,{credentials:"same-origin"}).then(function(response){if(!response["ok"]){throw"failed to load wasm binary file at '"+wasmBinaryFile+"'"}return response["arrayBuffer"]()}).catch(function(){return getBinary(wasmBinaryFile)})}}return 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filename",line,func?UTF8ToString(func):"unknown function"])}function _abort(){abort("")}var readAsmConstArgsArray=[];function readAsmConstArgs(sigPtr,buf){readAsmConstArgsArray.length=0;var ch;buf>>=2;while(ch=HEAPU8[sigPtr++]){var readAsmConstArgsDouble=ch<105;if(readAsmConstArgsDouble&&buf&1)buf++;readAsmConstArgsArray.push(readAsmConstArgsDouble?HEAPF64[buf++>>1]:HEAP32[buf]);++buf}return readAsmConstArgsArray}function _emscripten_asm_const_int(code,sigPtr,argbuf){var args=readAsmConstArgs(sigPtr,argbuf);return ASM_CONSTS[code].apply(null,args)}function _emscripten_memcpy_big(dest,src,num){HEAPU8.copyWithin(dest,src,src+num)}function abortOnCannotGrowMemory(requestedSize){abort("OOM")}function _emscripten_resize_heap(requestedSize){var oldSize=HEAPU8.length;requestedSize=requestedSize>>>0;abortOnCannotGrowMemory(requestedSize)}var SYSCALLS={buffers:[null,[],[]],printChar:function(stream,curr){var 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___wasm_call_ctors=Module["___wasm_call_ctors"]=function(){return(___wasm_call_ctors=Module["___wasm_call_ctors"]=Module["asm"]["j"]).apply(null,arguments)};var _malloc=Module["_malloc"]=function(){return(_malloc=Module["_malloc"]=Module["asm"]["k"]).apply(null,arguments)};var _free=Module["_free"]=function(){return(_free=Module["_free"]=Module["asm"]["l"]).apply(null,arguments)};var _lnsocket_make_default_initmsg=Module["_lnsocket_make_default_initmsg"]=function(){return(_lnsocket_make_default_initmsg=Module["_lnsocket_make_default_initmsg"]=Module["asm"]["n"]).apply(null,arguments)};var _lnsocket_encrypt=Module["_lnsocket_encrypt"]=function(){return(_lnsocket_encrypt=Module["_lnsocket_encrypt"]=Module["asm"]["o"]).apply(null,arguments)};var _lnsocket_decrypt=Module["_lnsocket_decrypt"]=function(){return(_lnsocket_decrypt=Module["_lnsocket_decrypt"]=Module["asm"]["p"]).apply(null,arguments)};var _lnsocket_decrypt_header=Module["_lnsocket_decrypt_header"]=function(){return(_lnsocket_decrypt_header=Module["_lnsocket_decrypt_header"]=Module["asm"]["q"]).apply(null,arguments)};var _lnsocket_make_ping_msg=Module["_lnsocket_make_ping_msg"]=function(){return(_lnsocket_make_ping_msg=Module["_lnsocket_make_ping_msg"]=Module["asm"]["r"]).apply(null,arguments)};var _lnsocket_msgbuf=Module["_lnsocket_msgbuf"]=function(){return(_lnsocket_msgbuf=Module["_lnsocket_msgbuf"]=Module["asm"]["s"]).apply(null,arguments)};var _lnsocket_create=Module["_lnsocket_create"]=function(){return(_lnsocket_create=Module["_lnsocket_create"]=Module["asm"]["t"]).apply(null,arguments)};var _lnsocket_destroy=Module["_lnsocket_destroy"]=function(){return(_lnsocket_destroy=Module["_lnsocket_destroy"]=Module["asm"]["u"]).apply(null,arguments)};var _lnsocket_secp=Module["_lnsocket_secp"]=function(){return(_lnsocket_secp=Module["_lnsocket_secp"]=Module["asm"]["v"]).apply(null,arguments)};var _lnsocket_genkey=Module["_lnsocket_genkey"]=function(){return(_lnsocket_genkey=Module["_lnsocket_genkey"]=Module["asm"]["w"]).apply(null,arguments)};var _lnsocket_print_errors=Module["_lnsocket_print_errors"]=function(){return(_lnsocket_print_errors=Module["_lnsocket_print_errors"]=Module["asm"]["x"]).apply(null,arguments)};var _lnsocket_act_two=Module["_lnsocket_act_two"]=function(){return(_lnsocket_act_two=Module["_lnsocket_act_two"]=Module["asm"]["y"]).apply(null,arguments)};var _commando_make_rpc_msg=Module["_commando_make_rpc_msg"]=function(){return(_commando_make_rpc_msg=Module["_commando_make_rpc_msg"]=Module["asm"]["z"]).apply(null,arguments)};var _lnsocket_act_one=Module["_lnsocket_act_one"]=function(){return(_lnsocket_act_one=Module["_lnsocket_act_one"]=Module["asm"]["A"]).apply(null,arguments)};var stackSave=Module["stackSave"]=function(){return(stackSave=Module["stackSave"]=Module["asm"]["B"]).apply(null,arguments)};var stackRestore=Module["stackRestore"]=function(){return(stackRestore=Module["stackRestore"]=Module["asm"]["C"]).apply(null,arguments)};var stackAlloc=Module["stackAlloc"]=function(){return(stackAlloc=Module["stackAlloc"]=Module["asm"]["D"]).apply(null,arguments)};Module["ccall"]=ccall;Module["cwrap"]=cwrap;var calledRun;dependenciesFulfilled=function runCaller(){if(!calledRun)run();if(!calledRun)dependenciesFulfilled=runCaller};function run(args){args=args||arguments_;if(runDependencies>0){return}preRun();if(runDependencies>0){return}function doRun(){if(calledRun)return;calledRun=true;Module["calledRun"]=true;if(ABORT)return;initRuntime();readyPromiseResolve(Module);if(Module["onRuntimeInitialized"])Module["onRuntimeInitialized"]();postRun()}if(Module["setStatus"]){Module["setStatus"]("Running...");setTimeout(function(){setTimeout(function(){Module["setStatus"]("")},1);doRun()},1)}else{doRun()}}Module["run"]=run;if(Module["preInit"]){if(typeof Module["preInit"]=="function")Module["preInit"]=[Module["preInit"]];while(Module["preInit"].length>0){Module["preInit"].pop()()}}run(); + + + return Module.ready +} +); +})(); +if (typeof exports === 'object' && typeof module === 'object') + module.exports = Module; +else if (typeof define === 'function' && define['amd']) + define([], function() { return Module; }); +else if (typeof exports === 'object') + exports["Module"] = Module; + +async function lnsocket_init() { + const module = await Module() + + function SocketImpl(host) { + if (!(this instanceof SocketImpl)) + return new SocketImpl(host) + + if (typeof WebSocket !== 'undefined') { + console.log("WebSocket", typeof WebSocket) + const ok = host.startsWith("ws://") || host.startsWith("wss://") + if (!ok) + throw new Error("host must start with ws:// or wss://") + const ws = new WebSocket(host) + ws.ondata = function(fn) { + ws.onmessage = (v) => { + const data = v.data.arrayBuffer() + fn(data) + } + } + return ws + } + + // + // we're in nodejs + // + const net = require('net') + let [hostname,port] = host.split(":") + port = +port || 9735 + const socket = net.createConnection(port, hostname, () => { + socket.emit("open") + }) + socket.addEventListener = socket.on.bind(socket) + + if (socket.onmessage) + throw new Error("socket already has onmessage?") + + socket.ondata = (fn) => { + socket.on('data', fn) + } + + socket.close = () => { + socket.destroy() + } + + if (socket.send) + throw new Error("socket already has send?") + + socket.send = function socket_send(data) { + return new Promise((resolve, reject) => { + socket.write(data, resolve) + }); + } + + return socket + } + + const ACT_ONE_SIZE = 50 + const ACT_TWO_SIZE = 50 + const ACT_THREE_SIZE = 66 + const DEFAULT_TIMEOUT = 15000 + + const COMMANDO_REPLY_CONTINUES = 0x594b + const COMMANDO_REPLY_TERM = 0x594d + + const lnsocket_create = module.cwrap("lnsocket_create", "number") + const lnsocket_destroy = module.cwrap("lnsocket_destroy", "number") + const lnsocket_encrypt = module.cwrap("lnsocket_encrypt", "number", ["int", "array", "int", "int"]) + const lnsocket_decrypt = module.cwrap("lnsocket_decrypt", "number", ["int", "array", "int"]) + const lnsocket_decrypt_header = module.cwrap("lnsocket_decrypt_header", "number", ["number", "array"]) + const lnsocket_msgbuf = module.cwrap("lnsocket_msgbuf", "number", ["int"]) + const lnsocket_act_one = module.cwrap("lnsocket_act_one", "number", ["number", "string"]) + const lnsocket_act_two = module.cwrap("lnsocket_act_two", "number", ["number", "array"]) + const lnsocket_print_errors = module.cwrap("lnsocket_print_errors", "int") + const lnsocket_genkey = module.cwrap("lnsocket_genkey", "int") + const lnsocket_make_default_initmsg = module.cwrap("lnsocket_make_default_initmsg", "int", ["int", "int"]) + const lnsocket_make_ping_msg = module.cwrap("lnsocket_make_ping_msg", "int", ["int", "int", "int", "int"]) + const commando_make_rpc_msg = module.cwrap("commando_make_rpc_msg", "int", ["string", "string", "string", "number", "int", "int"]) + + function concat_u8_arrays(arrays) { + // sum of individual array lengths + let totalLength = arrays.reduce((acc, value) => + acc + (value.length || value.byteLength) + , 0); + + if (!arrays.length) return null; + + let result = new Uint8Array(totalLength); + + let length = 0; + for (let array of arrays) { + if (array instanceof ArrayBuffer) + result.set(new Uint8Array(array), length); + else + result.set(array, length); + + length += (array.length || array.byteLength); + } + + return result; + } + + function parse_msgtype(buf) { + return buf[0] << 8 | buf[1] + } + + function wasm_mem(ptr, size) { + return new Uint8Array(module.HEAPU8.buffer, ptr, size); + } + + function LNSocket(opts) { + if (!(this instanceof LNSocket)) + return new LNSocket(opts) + + this.opts = opts || { + timeout: DEFAULT_TIMEOUT + } + this.queue = [] + this.ln = lnsocket_create() + } + + LNSocket.prototype.queue_recv = function() { + let self = this + return new Promise((resolve, reject) => { + const checker = setInterval(() => { + const val = self.queue.shift() + if (val) { + clearInterval(checker) + resolve(val) + } else if (!self.connected) { + clearInterval(checker) + reject() + } + }, 5); + }) + } + + LNSocket.prototype.print_errors = function _lnsocket_print_errors() { + lnsocket_print_errors(this.ln) + } + + LNSocket.prototype.genkey = function _lnsocket_genkey() { + lnsocket_genkey(this.ln) + } + + LNSocket.prototype.act_one_data = function _lnsocket_act_one(node_id) { + const act_one_ptr = lnsocket_act_one(this.ln, node_id) + if (act_one_ptr === 0) + return null + return wasm_mem(act_one_ptr, ACT_ONE_SIZE) + } + + LNSocket.prototype.act_two = function _lnsocket_act_two(act2) { + const act_three_ptr = lnsocket_act_two(this.ln, new Uint8Array(act2)) + if (act_three_ptr === 0) { + this.print_errors() + return null + } + return wasm_mem(act_three_ptr, ACT_THREE_SIZE) + } + + LNSocket.prototype.connect = async function lnsocket_connect(node_id, host) { + await handle_connect(this, node_id, host) + + const act1 = this.act_one_data(node_id) + this.ws.send(act1) + const act2 = await this.read_all(ACT_TWO_SIZE) + if (act2.length != ACT_TWO_SIZE) { + throw new Error(`expected act2 to be ${ACT_TWO_SIZE} long, got ${act2.length}`) + } + const act3 = this.act_two(act2) + this.ws.send(act3) + } + + LNSocket.prototype.connect_and_init = async function _connect_and_init(node_id, host) { + await this.connect(node_id, host) + await this.perform_init() + } + + LNSocket.prototype.read_all = async function read_all(n) { + let count = 0 + let chunks = [] + if (!this.connected) + throw new Error("read_all: not connected") + while (true) { + let res = await this.queue_recv() + + const remaining = n - count + + if (res.byteLength > remaining) { + chunks.push(res.slice(0, remaining)) + this.queue.unshift(res.slice(remaining)) + break + } else if (res.byteLength === remaining) { + chunks.push(res) + break + } + + chunks.push(res) + count += res.byteLength + } + + return concat_u8_arrays(chunks) + } + + LNSocket.prototype.read_header = async function read_header() { + const header = await this.read_all(18) + if (header.length != 18) + throw new Error("Failed to read header") + return lnsocket_decrypt_header(this.ln, header) + } + + LNSocket.prototype.rpc = async function lnsocket_rpc(opts) { + const msg = this.make_commando_msg(opts) + this.write(msg) + const res = await this.read_all_rpc() + return JSON.parse(res) + } + + LNSocket.prototype.recv = async function lnsocket_recv() { + const msg = await this.read() + const msgtype = parse_msgtype(msg.slice(0,2)) + const res = [msgtype, msg.slice(2)] + return res + } + + LNSocket.prototype.read_all_rpc = async function read_all_rpc() { + let chunks = [] + while (true) { + const [typ, msg] = await this.recv() + switch (typ) { + case COMMANDO_REPLY_TERM: + chunks.push(msg.slice(8)) + return new TextDecoder().decode(concat_u8_arrays(chunks)); + case COMMANDO_REPLY_CONTINUES: + chunks.push(msg.slice(8)) + break + default: + console.log("got unknown type", typ) + continue + } + } + } + + LNSocket.prototype.make_commando_msg = function _lnsocket_make_commando_msg(opts) { + const buflen = 4096 + let len = 0; + const buf = module._malloc(buflen); + module.HEAPU8.set(Uint8Array, buf); + + const params = JSON.stringify(opts.params||{}) + if (!(len = commando_make_rpc_msg(opts.method, params, opts.rune, + 0, buf, buflen))) { + throw new Error("couldn't make commando msg"); + } + + const dat = wasm_mem(buf, len) + module._free(buf); + return dat + } + + LNSocket.prototype.make_ping_msg = function _lnsocket_make_ping_msg(num_pong_bytes=1, ignored_bytes=1) { + const buflen = 32 + let len = 0; + const buf = module._malloc(buflen); + module.HEAPU8.set(Uint8Array, buf); + + if (!(len = lnsocket_make_ping_msg(buf, buflen, num_pong_bytes, ignored_bytes))) + throw new Error("couldn't make ping msg"); + + const dat = wasm_mem(buf, len) + module._free(buf); + return dat + } + + LNSocket.prototype.encrypt = function _lnsocket_encrypt(dat) { + const len = lnsocket_encrypt(this.ln, dat, dat.length) + if (len === 0) { + this.print_errors() + throw new Error("encrypt error") + } + const enc = wasm_mem(lnsocket_msgbuf(this.ln), len) + return enc + } + + LNSocket.prototype.decrypt = function _lnsocket_decrypt(dat) { + const len = lnsocket_decrypt(this.ln, dat, dat.length) + if (len === 0) { + this.print_errors() + throw new Error("decrypt error") + } + return wasm_mem(lnsocket_msgbuf(this.ln), len) + } + + LNSocket.prototype.write = function _lnsocket_write(dat) { + this.ws.send(this.encrypt(dat)) + } + + LNSocket.prototype.read = async function _lnsocket_read() { + const size = await this.read_header() + const enc = await this.read_all(size+16) + return this.decrypt(enc) + } + + LNSocket.prototype.make_default_initmsg = function _lnsocket_make_default_initmsg() { + const buflen = 1024 + let len = 0; + const buf = module._malloc(buflen); + module.HEAPU8.set(Uint8Array, buf); + + if (!(len = lnsocket_make_default_initmsg(buf, buflen))) + throw new Error("couldn't make initmsg"); + + const dat = wasm_mem(buf, len) + module._free(buf); + return dat + } + + LNSocket.prototype.perform_init = async function lnsocket_connect() { + await this.read() + const our_init = this.make_default_initmsg() + this.write(our_init) + } + + LNSocket.prototype.ping_pong = async function lnsocket_ping_pong() { + const pingmsg = this.make_ping_msg() + this.write(pingmsg) + return await this.read() + } + + LNSocket.prototype.disconnect = function lnsocket_disconnect() { + if (this.connected === true && this.ws) { + this.ws.close() + return true + } + return false + } + + LNSocket.prototype.destroy = function _lnsocket_destroy() { + this.disconnect() + lnsocket_destroy(this.ln) + } + + function handle_connect(ln, node_id, host) { + const ws = new SocketImpl(host) + return new Promise((resolve, reject) => { + const timeout = ln.opts.timeout || DEFAULT_TIMEOUT + const timer = setTimeout(reject, timeout); + + ws.ondata((v) => { + ln.queue.push(v) + }); + + ws.addEventListener('open', function(ev) { + ln.ws = ws + ln.connected = true + clearTimeout(timer) + resolve(ws) + }); + + ws.addEventListener('close', function(ev) { + ln.connected = false + }); + }) + } + + return LNSocket +} + +Module.init = Module.lnsocket_init = lnsocket_init diff --git a/dist/js/lnsocket.wasm b/dist/js/lnsocket.wasm Binary files differ.