FA-85978 / Game economy crafting balance / Member archive

Auction house fees: Deposit counts day blocks instead of half days · case 03

Long listings are undercharged by half.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Deposit = per_block * (hours//12) where per_block = max(1, floor(stack_value*15/100)). Sold: net = price - cut with cut = 5% of price rounded half up (deposit refunded). Expired: net = -deposit. Cancelled: net = -deposit - floor(bid*5/100) (bid defaults to 0). Returns {deposit, net} in copper.

Why this case matters

Game economies leak or destroy currency when one crafting or pricing rule is off by one boundary, rounding stage or state update; the defect is observable in exact integer outcomes.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
cancel with bid #1	`{"deposit": 6, "net": -25}`	`{"deposit": 12, "net": -31}`	Failed

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