Buy Your Coffee with Bitcoin: Real-World Deployment of a Bitcoin Point of Sale Terminal
In this paper we discuss existing approaches for Bitcoin payments, as suitable for a small business for small-value transactions. We develop an evaluation framework utilizing security, usability, deployability criteria and examine several existing systems and tools. Following a requirements engineering approach, we designed and implemented a new Point of Sale (PoS) system that satisfies an optimal set of criteria within our evaluation framework. Our open source system, Aunja PoS, has been deployed in a real world café since October 2014.