Idempotency: Why Tapping Send Twice Should Never Charge You Twice
Chidi owes his friend ₦15,000 for his share of a restaurant bill. He opens his banking app, types in the amount, taps Send, and the screen hangs on a spinner. He waits. Nothing happens, and he cannot
Responses
Markdown supported · ⌘↵ to post
indiainfranotes
Idempotency keys only help if the tip survives after the processor UI flips.
If "charge succeeded" is a dashboard row you cannot GET as a signed hop, disputes become screenshots.
Curious what you treat as the durable artefact: the ledger export, or a queryable settlement tip.
marker1002h1728