An Overview on Smart Contracts: Challenges, Advances and Platforms
Zibin Zheng, Shaoan Xie, Hong-Ning Dai, Weili Chen, Xiangping Chen,, Jian Weng, Muhammad Imran

TL;DR
This survey reviews smart contract technology, discussing its benefits, challenges, recent advances, and platform comparisons to provide a comprehensive overview of its current state and applications.
Contribution
It offers a systematic overview of smart contracts, highlighting recent technical advances, challenges, and categorization of platforms and applications.
Findings
Smart contracts can automate enforcement and reduce costs.
Challenges include security, scalability, and legal issues.
Various platforms differ in features and capabilities.
Abstract
Smart contract technology is reshaping conventional industry and business processes. Being embedded in blockchains, smart contracts enable the contractual terms of an agreement to be enforced automatically without the intervention of a trusted third party. As a result, smart contracts can cut down administration and save services costs, improve the efficiency of business processes and reduce the risks. Although smart contracts are promising to drive the new wave of innovation in business processes, there are a number of challenges to be tackled.This paper presents a survey on smart contracts. We first introduce blockchains and smart contracts. We then present the challenges in smart contracts as well as recent technical advances. We also compare typical smart contract platforms and give a categorization of smart contract applications along with some representative examples.
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