feat(State Channels): Remove endpoint param (#391)

* feat(State Channels): Remove endpoint param

BREAKING CHANGE: Endpoint param is removed and no longer defaults to "/channel". This means that
"/channel" (or other path) must be appendend to url para

* Fix channel test

Author: mpowaga

es/channel/internal.js

@@ -40,11 +40,11 @@ const rpcCallbacks = new WeakMap()
 const pingTimeoutId = new WeakMap()
 const pongTimeoutId = new WeakMap()
 
-function channelURL (url, params, endpoint = 'channel') {
+function channelURL (url, params) {
   const paramString = R.join('&', R.values(R.mapObjIndexed((value, key) =>
     `${pascalToSnake(key)}=${encodeURIComponent(value)}`, params)))
 
-  return `${url}/${endpoint}?${paramString}`
+  return `${url}?${paramString}`
 }
 
 function emit (channel, ...args) {
@@ -198,10 +198,10 @@ function WebSocket (url, callbacks) {
 }
 
 async function initialize (channel, channelOptions) {
-  const optionsKeys = ['sign', 'endpoint', 'url']
+  const optionsKeys = ['sign', 'url']
   const params = R.pickBy(key => !optionsKeys.includes(key), channelOptions)
-  const { endpoint, url } = channelOptions
-  const wsUrl = channelURL(url, { ...params, protocol: 'json-rpc' }, endpoint)
+  const { url } = channelOptions
+  const wsUrl = channelURL(url, { ...params, protocol: 'json-rpc' })
 
   options.set(channel, channelOptions)
   fsm.set(channel, { handler: awaitingConnection })

test/integration/channel.js

@@ -24,7 +24,7 @@ import { unpackTx, buildTx } from '../../es/tx/builder'
 import { decode } from '../../es/tx/builder/helpers'
 import Channel from '../../es/channel'
 
-const wsUrl = process.env.WS_URL || 'ws://node:3014'
+const wsUrl = process.env.WS_URL || 'ws://node:3014/channel'
 
 plan('10000000000000000')