傳統型的交易系統大多採用主從式架構設計，以應用程式與資料庫的結合為主，應用程式負責邏輯，資料庫則儲存資料。區塊鏈與智能合約的出現讓交易方式有了變化，透過智能合約能結合程式邏輯與資料的狀態，讓即時交易能夠運作在區塊鏈的環境中。
本篇論文提出一套基於區塊鏈與卡夫卡訊息佇列的即時交易系統，結合分散式與集中式系統的優點，使用以以太坊為基礎獨立出來的Quorum開發環境作為區塊鏈網路，星際檔案系統作為分散式資料庫。
本論文實作即時交易售票系統，透過智能合約處理取得票券的流程，再透過第三方支付進行付款，最後回到伺服器上的活動管理系統，產生票券，即可完成購票流程，透過區塊鏈的方式讓售票系統的售票邏輯與票務流程，分開於智能合約與傳統網頁系統上執行，利用智能合約整合程式邏輯與資料庫的優勢，讓售票系統有更快的反應速度。

Most of the traditional transaction systems adopt the client-server architecture design, which is based on the combination of application-side and database. The application is responsible for program logic and the database stores data. The emergence of blockchain and smart contracts has changed the way making transaction is done. Smart contracts can combine program logic with the state of the data, allowing instant transactions to operate in a blockchain environment.
This paper proposes a real-time trading system based on blockchain and Kafka messages. Combining the advantages of decentralized and centralized systems, the Quorum development environment based on Ethereum is used as a blockchain network. The inter-planet file system acts as a decentralized database.
This paper is also implemented as a real-time ticketing system. The process of obtaining tickets through smart contract processing, payment through third-party payment, and finally returning to the event management system on the server to generate tickets, the ticket purchase process can be completed. The blockchain approach allows the ticketing system's ticketing logic and ticketing process to be performed separately from smart contracts and traditional web systems, using smart contracts to integrate program logic and database advantages, allowing the ticketing system to react more quickly.

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