FA-84473 / Betting odds conversion / Member archive

Half-win leg settled as a full win or as half the price · case 03

Parlays with a half-won Asian leg are over- or under-paid.

Member previewVariant 3 · 3 implementations · 9 checks per implementation

Case contract

Accumulator settlement. legs rows are [decimal price, result] with results win, lose, push, void, half-win (half the stake wins at the price, half is refunded: factor (1 + d) / 2) and half-lose (half refunded: factor 1/2). push and void legs have factor 1, win factor d, lose makes the whole bet lose. Return [combined factor rounded half up to four decimals as a string, payout in cents rounded down].

Why this case matters

Settlement engines must collapse pushed, voided and Asian half results inside multiples.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
boundary half-win leg	`["4.0000", 4000]`	`["3.0000", 3000]`	Failed

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