funman300
21a81ad63c
Multi-agent pass over the store subsystem, 11 agents, findings run through three
adversarial verifiers. Full writeup in docs/plan-2026-08-05-store-subsystem.md.
THE REAL DISCARD TABLE IS RECOVERED. quick_sell() paid an invented rating tier
(600/300/150/50) that was wrong for every single card. The real table is
fcc_discardcoins in the client's own game DB, 141 rows keyed (cardtype, level, rare),
read out of the running client and verified 22/22 against live items:
value = round_half_up(rating * price / 100)
level = 3 if rating >= 75, 2 if 65..74, else 1 (0x180141e8a..0x180141ea3,
derived from rating, NOT a wire field)
cardtype = FUN_1800d8330(cardsubtypeid), decoded from its jump table and checked
across every subtype 0..599 with zero disagreements
A 94-rated gold rare is 752, not 600. A 76 rare is 608, not 150. A 55 bronze is 17,
not 50.
This also closes a disagreement nobody had noticed: the CLIENT already computes and
displays the correct value locally whenever our discardValue (atom 0xd7) is 0 or
absent. FUN_18013fe00 stores our value at item +0x38 and the guard at 0x180141025
skips the local computation when it is non-zero. So the screen has been showing the
real number while the server paid a made-up one, on every quick sell ever made.
Verified beyond what the report claimed, because a missing table row pays ZERO and
that would be a regression the old flat tier could not produce: across all 236 items
in the live profile, 230 map to cardtype 1 and 6 to cardtype 6, and NOT ONE would pay
0 coins. Table reproduces at 141 rows and the worked example lands exactly.
ZERO WIRE CHANGE, FUT_DISCARD_TABLE default off. Nothing new is sent; only the coin
figure the server credits moves. This is the patch worth defaulting on after one
in-game check, which is simply quick-selling a card and seeing the coins paid match
the value the card was already displaying.
THE GROUPING BUG IS NOT IN CARDSDLL, and the fix ranked first would have wasted a
launch. Live in the running client all three display groups own exactly the right
pack, there is exactly one copy of each pack record in 4 GiB, and nothing we send is
mis-parsed. The parsed model is correct and the Scaleform layer picks the wrong pack
when turning a tile click into a category id. displayGroupAssetId is served as 1/5/6
while the screen's category field reads 3, and group tiles carry a hardcoded
CATEGORY_ID of 0. Confirmed by direct read: ordinal 3, assetId 6, i.e. Premium, while
the last click was Gold.
The heap map that made this possible, all scoped to one pid: display-group vector
control block, 3 elements of 0x108; group record fields at +0x00 sortPriority,
+0x04 displayGroupAssetId, +0x40 a one-element pack vector; inner pack record 0x1a8
with packType at +0x38, ids at +0x70/+0xac, price at +0xa0, quantities at +0xc0..+0xd0.
extPrice SHOULD BE DELETED, not corrected. Both sub-parsers read only
externalPriceId; amount and currency are discarded. Sending the key at all creates an
"mtx" currency row that switches on a real-money price line the client can never fill
offline, which is the literal "or %1s" on every tile.
A WORRY NOBODY HAD RAISED, and I confirmed it from our own logs: the client has sent
packId 6 on every purchase it has ever made, four for four tonight and six for six
across history. We have never observed a successful buy of anything but Premium Gold.
Also settled: FUT_STORE_DISPLAYGROUP=0 is the right resting state, argued from
mechanism rather than from history; FUT_USERINFO=packs stays off because the
unopened-pack counter is client-mutable and the flag ladder silently drops squadList;
POST /user is a latent hard freeze that has never fired because the client never
issues that POST.
Honest coverage: the ActionScript layer is unread by everyone and every remaining
store mystery lives there.
Live: 439 contract checks pass, market suite passes, both flags off.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
86 lines
2.9 KiB
Python
86 lines
2.9 KiB
Python
"""DIMENSION 1 / query 1.
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HYPOTHESIS: a CardsDLL function converts the 0x158 pack deser records into
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0x1a8 pack model records grouped into 0x108 display-group records, and a
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second function resolves a display group back to a pack at render time. If
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the resolver keys on a field that collides between our two GOLD packs
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(packType), that explains Gold-group -> Premium-Gold.
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CONTROL: FUN_1800150d0 is documented as walking the pack array and comparing
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displayGroup.value against the literal "mypacks" at 0x1801ec008. Decompiling it
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with the same helper proves the helper works and shows the house style of a
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group filter. Every "not present" claim below prints len(src) first.
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"""
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import traceback
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OUT = "/tmp/claude-1000/-home-alex-Documents-OpenFUT/8e521ca1-ca3e-4138-bb96-df1744dd1d30/scratchpad/store/q1_out.txt"
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buf = []
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def P(*a):
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s = " ".join(str(x) for x in a)
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buf.append(s)
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print(s)
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try:
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P("=" * 78)
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P("A. CONTROL: FUN_1800150d0, the documented mypacks filter")
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P("=" * 78)
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s = dec(0x1800150d0)
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P("len(src) =", len(s))
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P(s)
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P("=" * 78)
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P("B. FUN_1801340e0 (0x108 vector grow) - full decompile + callers")
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P("=" * 78)
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s = dec(0x1801340e0)
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P("len(src) =", len(s))
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P(s)
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P("--- callers of 0x1801340e0 ---")
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for f in callers(0x1801340e0):
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P(" ", f.getName(), hex(int(f.getEntryPoint().getOffset())))
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P("=" * 78)
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P("C. FUN_180132180 (0x158) - callers only")
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P("=" * 78)
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for f in callers(0x180132180):
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P(" ", f.getName(), hex(int(f.getEntryPoint().getOffset())))
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P("=" * 78)
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P("D. callers of the pack element deser 0x18013af30")
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P("=" * 78)
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for f in callers(0x18013af30):
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P(" ", f.getName(), hex(int(f.getEntryPoint().getOffset())))
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P("=" * 78)
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P("E. where does imm 0x1a8 appear? (the live pack model record size)")
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P("=" * 78)
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# scan .text for the 32-bit immediate 0xa8 0x01 0x00 0x00 in instructions
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import java.lang as _jl # noqa
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from ghidra.program.model.address import AddressSet # noqa
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cnt = 0
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it = listing.getInstructions(True)
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hits = []
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while it.hasNext():
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ins = it.next()
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for i in range(ins.getNumOperands()):
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for o in ins.getOpObjects(i):
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try:
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v = int(o.getValue())
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except Exception:
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continue
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if v == 0x1a8:
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hits.append((int(ins.getAddress().getOffset()), str(ins)))
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P("0x1a8 immediate occurrences:", len(hits))
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seen = {}
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for a, t in hits:
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f = fm.getFunctionContaining(addr(a))
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n = f.getName() if f else "?"
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seen.setdefault(n, []).append((hex(a), t))
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for n in sorted(seen, key=lambda k: -len(seen[k])):
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P(" %-28s x%d %s" % (n, len(seen[n]), seen[n][:4]))
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except Exception:
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P(traceback.format_exc())
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open(OUT, "w").write("\n".join(buf))
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print("WROTE", OUT)
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