Add websocket doc.

README.md

@@ -2,4 +2,4 @@
 
 [restapi.md](./restapi.md)
 
-[WIP][websocket.md](./websocket.md)
+[websocket.md](./websocket.md)

websocket.md

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+# Websocket Stream for Bilaxy
+
+#### wss://bilaxy.com/stream
+Returns three types of data: depth, ticker, and trade.
+
+**Parameters:**
+
+Name | Type | Required | Description
+--------|--------|--------|--------
+symbol | integer | true | Specify trade pair ID.
+
+**Response:**
+
+Name | Type | Description
+--------|--------|--------
+symbol | integer | Specify trade pair ID.
+method | string | `depth` or `ticker` or `trade`.
+result | object | The result types of different methods are different, see below for details.
+
+- depth data
+
+Name | Type | Description
+--------|--------|--------
+ts | integer | timestamp.
+b | array | Buy order depth data.The first item is `price`, the second item is `amount`, and the third item is `total`. Sort by descending price.
+a | array | Sell order depth data.The first item is `price`, the second item is `amount`, and the third item is `total`. Sort by ascending price.
+```
+{
+  "symbol": "113",
+  "method": "depth",
+  "result": {
+    "ts": 1575612035641,
+    "b": [
+      [
+        7391.3,
+        1.921714,
+        14203.9646882
+      ],
+      [
+        7391.29,
+        0.435503,
+        3218.9289688699996
+      ]
+    ],
+    "a": [
+      [
+        7393.7,
+        0.021128,
+        156.2140936
+      ],
+      [
+        7393.76,
+        0.52667,
+        3894.0715792
+      ]
+    ]
+  }
+}
+```
+- 24 hour ticker data
+
+Name | Type | Description
+--------|--------|--------
+ts | integer | timestamp.
+c | decimal | Closing price.
+h | decimal | Highest price.
+l | decimal | Lowest price.
+v | decimal | Quote trade volume.
+rf | decimal | Price rise and fall. 
+```
+{
+  "symbol": "113",
+  "method": "ticker",
+  "result": {
+    "ts": 1575612419775,
+    "c": 7383.43,
+    "h": 7483.39,
+    "l": 7263.4,
+    "v": 59360.895796,
+    "rf": 0.012122
+  }
+}
+```
+- Orders traded data
+
+Name | Type | Description
+--------|--------|--------
+ts | integer | timestamp.
+id | integer | Order id.
+p | decimal | Price.
+q | decimal | Amount(Quote Volume).
+buy | boolean | Is buy or sell.
+```
+{
+  "symbol": "113",
+  "method": "trade",
+  "result": [
+    {
+      "ts": 1575613541609,
+      "id": 266369580,
+      "p": 7372.07,
+      "q": 0.102602,
+      "buy": true
+    },
+    {
+      "ts": 1575613541598,
+      "id": 266369578,
+      "p": 7372.02,
+      "q": 0.27376,
+      "buy": true
+    }
+  ]
+}
+```