reorg code, integration publish/subscribe working, still some TODOs

blockchain/transaction.js

@@ -0,0 +1,18 @@
+const Payment = require('./payment');
+const Integration = require('./integration');
+const SensorRegistration = require('./sensor-registration');
+const BrokerRegistration = require('./broker-registration');
+
+class Transaction {
+  constructor(transaction, type) {
+    this.transaction = transaction;
+    this.verify = type.verify;
+    this.type = type;
+  }
+
+  static mapId(type) {
+    return type.name();
+  }
+};
+
+module.exports = Transaction;