Three bearer-authed endpoints and gogobee can work the border: poll what's
waiting, claim a row, report what happened to the money. The storage layer
underneath was already done; this is the transport, and deliberately nothing
more.
All three are idempotent, because the thing on the other end of them is a
retrying queue and the thing they move is money. A verdict delivered three
times creates chips once. A rejected buy-in moves nothing and clears the
pending amount so it stops eating the table cap. A cash-out gogobee couldn't
pay gives the chips back rather than vanishing them from both sides.
A verdict for a row Pete has never heard of is a 400, not a shrug: gogobee has
by then moved real euros against it, and no amount of retrying invents the
missing row. Under the contract the adventure seam set, a 400 parks it in
gogobee's queue where a human can find it.
