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ERC20 defines a standard for the creation of a specific type, called ERC20 token, one of the most widely adopted tokens on Ethereum. ERC20 tokens are transferred through dedicated transactions </div> <div> among Ethereum addresses, and managed by smart contracts. Smart contracts that manage ERC20 tokens have exhibited nondeterministic behaviour that has lead to issues of trust on its usage. </div> <div> <br/> </div> <div> In this talk, we discuss issues of nondeterminism of ERC20 smart contracts and provide an overview of the various attempts to overcome possible exploitation of such vulnerabilities in the deployment of ERC20 smart contract. We also illustrate that the main reason for the nondeterministic behaviour of ERC20 is its innate requirement of strong synchronization as compared to those of classical crypto-currencies. Treating ERC20 smart contract as a set of asynchronous interacting processes executing on a blockchain, we describe an approach that is common in classical programming language specification, and derive a set of conditions that need to be satisfied to achieve the required synchronization. We shall further indicate how such conditions can indeed be enforced in ERC20 smart contract. </div> </div> <div class="row lecture__section"> <h2>About this Lecture</h2> <span> <strong>Number of Slides: </strong> 60</span><br/> <span> <strong>Duration: </strong> 60 minutes </span><br/> <span> <strong>Languages Available: </strong> English</span><br/> <span> <strong>Last Updated: </strong> <span id="lecDate"></span> </span> </div> <div class="row lecture__section"> <h2>Request this Lecture</h2> <p>To request this particular lecture, please complete this <a href="https://services.acm.org/public/speakers/request_lecture.cfm?lecture_id=15252" target="_blank">online form.</a> </p> </div> <div class="row lecture__section"> <h2>Request a Tour</h2> <p>To request a tour with this speaker, please complete this <a href="https://services.acm.org/public/speakers/request_tour.cfm?lecturer_id=17694" target="_blank">online form.</a> </p> <p>All requests will be sent to ACM headquarters for 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