During the donation process, the source and flow of donated goods are not disclosed to the public in time. In this paper, we propose the donation tracing blockchain model (DTBM) to render the donation process open and transparent, by using blockchain with decentralization, traceability, and anti-tampering. However, the existing blockchain systems have a problem that the process of Delegated Proof of Stake (DPoS) consensus algorithm is easily controlled by a few nodes. To prevent the centralization and reduce the probability of malicious nodes being selected, we propose an improved DPoS consensus algorithm for DTBM. It adopts the K-means algorithm to select good nodes in the agent queue in advance. Experimental results show that the donation process is transparent and traceable in DTBM. And it also solves the problem of centralization and improves security.

在捐赠过程中，捐赠物品的来源和流动没有及时向公众披露。在本文中，我们提出了捐赠追踪区块链模型（DTBM），通过使用具有去中心化，可追溯性和防篡改功能的区块链来使捐赠过程公开透明。但是，现有的区块链系统存在一个问题，即委托权益证明（DPoS）共识算法的过程很容易由几个节点控制。为了防止集中化并减少恶意节点被选择的可能性，我们提出了一种用于DTBM的改进的DPoS共识算法。它采用K-means算法预先在代理队列中选择好节点。实验结果表明，该捐赠过程在DTBM中是透明且可追溯的。