Add README

EVerest · Feb 5, 2024 · 8a3b7db · 8a3b7db
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+# ZVT Feig Terminal
+
+The crate implements the application logic for using a Feig terminal in production.
+
+We assume that you interact with the Feig terminal over TCP/IP.
+
+The high level interface for interacting with the Feig terminal is implemented
+in [src/feig.rs](src/feig.rs). It provides good defaults for reading cards and
+allows you to begin, commit or cancel transactions.