去掉 Action.js 里对 ActionXxx 的引入，这样还是会造成循环引入的。

index.js

@@ -3,7 +3,7 @@ const ActionTransfer = require('./ActionTransfer.js')
 const ActionStore = require('./ActionStore.js')
 const ActionMultisig = require('./ActionMultisig.js')
 const ActionLockProof = require('./ActionLockProof.js')
-const ActionTac = require('./ActionTac.js')
+// const ActionTac = require('./ActionTac.js')
 
 module.exports = {
 //	Action,