FA-60665 / Loyalty points ledgers / Member archive

Partner miles conversion: bonus base · case 05

Bonus miles are computed on points, over- or under-paying on non 1:1 ratios.

Member previewVariant 5 · 3 implementations · 7 checks per implementation

Case contract

Input {pts, block, min_pts, num, den, bonus_bp, threshold}. Usable points = pts floored to a block; usable below min_pts returns {"error"}. Miles = floor(usable*num/den). If usable >= threshold, bonus miles = floor(miles*bonus_bp/10000). Leftover points stay in the account. Return {used, miles, bonus, leftover}.

Why this case matters

Member point balances, statements and the program liability depend on this ledger rule.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
normal	`{"bonus": 3000, "leftover": 755, "miles": 9000, "used": 12000}`	`{"bonus": 2250, "leftover": 755, "miles": 9000, "used": 12000}`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.