CcyConv.jl

What it is

A Julia package that converts one currency into another by walking a graph of exchange rates, including routes with several hops. The default search looks for the path with the smallest product of rates and refuses to visit a currency twice, which also covers graphs that contain arbitrage cycles. A custom context can leave the topology in place and fill rates lazily from a live source such as a public exchange endpoint. Quantitative developers who already have quotes, or who can fetch them, are the audience, because the package does not ship a rate feed, and graphs with more than 64 currencies fall back to a slower exhaustive search.