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lightning-client-js.js
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lightning-client-js.js
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//Credit to Shesek for "github:shesek/lightning-client-js".
//This is the main library, which enables connection with the c-lightning node
'use strict';
const path = require('path');
const net = require('net');
const fs = require('fs');
const debug = require('debug')('lightning-client');
const {EventEmitter} = require('events');
const JSONParser = require('jsonparse');
const LightningError = require('error/typed')({ type: 'lightning', message: 'lightning-client error' });
const methods = require('./methods');
const defaultRpcPath = path.join(require('os').homedir(), '.lightning')
, fStat = (...p) => fs.statSync(path.join(...p))
, fExists = (...p) => fs.existsSync(path.join(...p));
let somedata = '';
class LightningClient extends EventEmitter {
constructor(rpcPath=defaultRpcPath) {
global.logger.log("rpcPath -> " + rpcPath);
if (!path.isAbsolute(rpcPath)) {
throw new Error('The rpcPath must be an absolute path');
}
if (!fExists(rpcPath) || !fStat(rpcPath).isSocket()){
// network directory provided, use the lightning-rpc within it
if (fExists(rpcPath, 'lightning-rpc')) {
rpcPath = path.join(rpcPath, 'lightning-rpc');
}
// main data directory provided, default to using the bitcoin mainnet subdirectory
else if (fExists(rpcPath, 'bitcoin', 'lightning-rpc')) {
global.logger.error(`WARN: ${rpcPath}/lightning-rpc is missing, using the bitcoin mainnet subdirectory at ${rpcPath}/bitcoin instead.`)
rpcPath = path.join(rpcPath, 'bitcoin', 'lightning-rpc')
}
// or using the bitcoin testnet subdirectory
else if (fExists(rpcPath, 'testnet', 'lightning-rpc')) {
global.logger.error(`WARN: ${rpcPath}/lightning-rpc is missing, using the bitcoin testnet subdirectory at ${rpcPath}/testnet instead.`)
rpcPath = path.join(rpcPath, 'testnet', 'lightning-rpc')
}
// or using the bitcoin signet subdirectory
else if (fExists(rpcPath, 'signet', 'lightning-rpc')) {
global.logger.error(`WARN: ${rpcPath}/lightning-rpc is missing, using the bitcoin signet subdirectory at ${rpcPath}/signet instead.`)
rpcPath = path.join(rpcPath, 'signet', 'lightning-rpc')
}
// or using the bitcoin regtest subdirectory
else if (fExists(rpcPath, 'regtest', 'lightning-rpc')){
global.logger.error(`WARN: ${rpcPath}/lightning-rpc is missing, using the bitcoin regtest subdirectory at ${rpcPath}/regtest instead.`)
rpcPath = path.join(rpcPath, 'regtest', 'lightning-rpc')
}
}
global.logger.log(`Connecting to ${rpcPath}`);
super();
this.rpcPath = rpcPath;
this.reconnectWait = 0.5;
this.reconnectTimeout = null;
this.reqcount = 0;
this.parser = new JSONParser
const _self = this;
this.client = net.createConnection(rpcPath);
this.clientConnectionPromise = new Promise(resolve => {
_self.client.on('connect', () => {
global.logger.log(`Lightning client connected`);
_self.reconnectWait = 1;
resolve();
});
_self.client.on('end', () => {
console.log('Lightning client connection closed');
});
_self.client.on('error', error => {
global.logger.error(`Lightning client connection error`, error);
_self.emit('error', error);
_self.increaseWaitTime();
_self.reconnect();
});
});
this.client.on('data', data => _self._handledata(data));
this.parser.onValue = function(val) {
if (this.stack.length) return; // top-level objects only
debug('#%d <-- %O', val.id, val.error || val.result)
_self.emit('res:' + val.id, val);
}
}
increaseWaitTime() {
if (this.reconnectWait >= 16) {
this.reconnectWait = 16;
} else {
this.reconnectWait *= 2;
}
}
reconnect() {
const _self = this;
if (this.reconnectTimeout) {
return;
}
this.reconnectTimeout = setTimeout(() => {
global.logger.log('Trying to reconnect...');
_self.client.connect(_self.rpcPath);
_self.reconnectTimeout = null;
}, this.reconnectWait * 1000);
}
call(method, args = []) {
const _self = this;
const callInt = ++this.reqcount;
const sendObj = {
jsonrpc: "2.0",
method,
params: args,
id: ''+callInt
};
//global.logger.log('#%d --> %s', callInt, method);
//global.logger.log(args);
// Wait for the client to connect
return this.clientConnectionPromise
.then(() => new Promise((resolve, reject) => {
// Send the command
_self.client.write(JSON.stringify(sendObj));
// Wait for a response
this.once('res:' + callInt, res => res.error == null
? resolve(res.result)
: reject(LightningError(res.error))
);
}));
}
_handledata(data) {
if (typeof global.REST_PLUGIN_CONFIG === 'undefined') {
this.parser.write(data)
} else {
if(data.length && data.length > 0) {
somedata += data
}
if (somedata.length > 1 && somedata.slice(-2) === "\n\n") {
this.parser.write(somedata)
somedata = ''
}
}
}
}
const protify = s => s.replace(/-([a-z])/g, m => m[1].toUpperCase());
methods.forEach(k => {
LightningClient.prototype[protify(k)] = function (...args) {
return this.call(k, args);
};
});
module.exports = rpcPath => new LightningClient(rpcPath);
module.exports.LightningClient = LightningClient;
module.exports.LightningError = LightningError;