After several posts analyzing what bills of exchange did, how governments killed them in 1914, what the parallel economy lacks without them, and what the engineering template for reconstruction looks like, it is time to name the project building it. Bitcredit runs electronic bills of exchange on Bitcoin, with a Chaumian ecash mint layer, a guarantee asset, and Nostr transport. This post maps the architecture. The series that follows will work through each component in detail.