add erc20 and modify basic chain folder

src/basic_chain/js/message.js

@@ -0,0 +1,24 @@
+'use strict';
+
+var MessageType = {
+    Connection: 0,
+    Block: 1,
+    Transaction: 2,
+    PrePrepare: 3,
+    Prepare: 4,
+    Commit: 5,
+    Sync: 6,
+    SyncBlock: 7
+};
+
+module.exports = {
+    type: MessageType,
+    connection: (data) => { return { type: MessageType.Connection, data: data }; },
+    block: (data) => { return { type: MessageType.Block, data: data }; },
+    preprepare: (data) => { return { type: MessageType.PrePrepare, data: data }; },
+    prepare: (data) => { return { type: MessageType.Prepare, data: data }; },
+    commit: (data) => { return { type: MessageType.Commit, data: data }; },
+    transaction: (data) => { return { type: MessageType.Transaction, data: data }; },
+    sync: (data) => { return { type: MessageType.Sync, data: data }; },
+    sync_block: (data) => { return { type: MessageType.SyncBlock, data: data }; }
+};