FA-84485 / Betting odds conversion / Member archive

Parlay payout rounded up or to nearest cent · case 05

Fractional-cent payouts are rounded up, overpaying the customer.

Member previewVariant 5 · 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
control payout rounds down	`["1.3300", 443]`	`["1.3300", 442]`	Failed

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