A short, opinionated field guide for the people — and the machines — that build software to move money. Three primitives — ValueType, TransferType, Exchange — that make most of payments legible and keep making sense as the rails underneath change. Its argument cuts against the grain: money is never replaced, only connected, and the connector gets paid. By Ben Milne, founder and CEO of Brale. 42 pages, 6×9. Free PDF.
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