Blockchains are one solution for secure distributed interaction, but security vulnerabilities have already been exposed in existing programs. Obsidian, a new blockchain programming language, seeks to prevent some of these vulnerabilities using typestate and linearity. We evaluate the current design of Obsidian by implementing a blockchain application for parametric insurance as a case study. We compare this implementation to one written in Solidity, and find that Obsidian can provide stronger safety guarantees.