FA-57211 / Auction allocation rules / Open access

Bilateral confirmation: buyer confirmation author · case 01

Seller-authored confirmation can bind the buyer.

Verified by executionVariant 1 · 11 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Seller-authored confirmation can bind the buyer.

THE FAILURE

Seller-authored confirmation can bind the buyer.

Unsuccessful approach: The attempted repair uses x["buyer_signer"]==x["buyer"]; the explicit regression cases demonstrate that this still violates the stipulated auction rule.

Case contract

After an auction allocation, buyer and seller confirmations reserve a specific trade version. A trade is final only when both parties confirm the same proposed version; rejection releases reservations but does not erase executed trades. Match identity differs from party identity. Named decision buyer-confirmation-author: For buyer confirmation author, apply the stipulated decision x["buyer_signer"]==x["buyer"] and x["buyer_accept"].

Why this case matters

Offline administrative auction model for software failure analysis.

1 / The failure

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(x):
    v0 = x["buyer_accept"] and x["seller_accept"]
    v1 = x["buyer_version"]==x["seller_version"]==x["version"]
    v2 = x["held"] if x["rejected"] and not x["executed"] else 0
    v3 = max(0,x["held"]-x["fill"])
    v4 = x["buyer_accept"]
    v5 = (x["seller_signer"]==x["seller"] or x["seller_signer"] in x["seller_delegates"]) and x["seller_accept"]
    v6 = 0 if x["match_id"]==x["last_match"] else x["fill"]
    v7 = x["reversed"] and x["executed"]
    v8 = x["held"] if x["timeout"] and not x["executed"] else 0
    v9 = [m for m in x["matched"] if m not in x["reported"]]
    return {'both-party-confirmation':v0,'same-proposal-version':v1,'rejection-release':v2,'partial-fill-reservation':v3,'buyer-confirmation-author':v4,'seller-delegate-authorization':v5,'execution-match-replay':v6,'reversal-execution-guard':v7,'timeout-release-guard':v8,'unreported-match-output':v9}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('wrong buyer signer', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 's', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [False, False, False, False, False]), ('both current / wrong buyer signer', {'version': 2, 'buyer_version': 2, 'seller_version': 2, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 's', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [False, False, False, False, False]), ('buyer rejects', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': False, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [False, False, False, False, False]), ('both current / buyer rejects', {'version': 2, 'buyer_version': 2, 'seller_version': 2, 'buyer_accept': False, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [False, False, False, False, False]), ('normal contract', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True]), ('both current', {'version': 2, 'buyer_version': 2, 'seller_version': 2, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True]), ('seller rejects', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': False, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True]), ('trade rejected', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': True, 'rejected': True, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True]), ('already executed', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': True, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True]), ('wrong seller signer', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 'b', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True]), ('match replay', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm1', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True])]
def vary(value):
 if type(value) is int: return value*N
 if isinstance(value,list): return [vary(v) for v in value]
 if isinstance(value,dict): return {k:(v if k in ['count', 'delivery_index', 'disputed', 'maximum_set', 'minimum_set', 'stage', 'threshold', 'waived'] else vary(v)) for k,v in value.items()}
 return value
for label, request, expected in fixtures:
 check(label, solve(vary(request))['buyer-confirmation-author'], expected[N-1])
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
wrong buyer signer	`True`	`False`	Failed
both current / wrong buyer signer	`True`	`False`	Failed
buyer rejects	`False`	`False`	Passed
both current / buyer rejects	`False`	`False`	Passed
normal contract	`True`	`True`	Passed
both current	`True`	`True`	Passed
seller rejects	`True`	`True`	Passed
trade rejected	`True`	`True`	Passed
already executed	`True`	`True`	Passed
wrong seller signer	`True`	`True`	Passed
match replay	`True`	`True`	Passed

SHA-256 / 2891e59abd63f642023178920c9d0b2e71db5a945ab4c8f493b47c4e8a0d32ef

2 / The unsuccessful fix

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(x):
    v0 = x["buyer_accept"] and x["seller_accept"]
    v1 = x["buyer_version"]==x["seller_version"]==x["version"]
    v2 = x["held"] if x["rejected"] and not x["executed"] else 0
    v3 = max(0,x["held"]-x["fill"])
    v4 = x["buyer_signer"]==x["buyer"]
    v5 = (x["seller_signer"]==x["seller"] or x["seller_signer"] in x["seller_delegates"]) and x["seller_accept"]
    v6 = 0 if x["match_id"]==x["last_match"] else x["fill"]
    v7 = x["reversed"] and x["executed"]
    v8 = x["held"] if x["timeout"] and not x["executed"] else 0
    v9 = [m for m in x["matched"] if m not in x["reported"]]
    return {'both-party-confirmation':v0,'same-proposal-version':v1,'rejection-release':v2,'partial-fill-reservation':v3,'buyer-confirmation-author':v4,'seller-delegate-authorization':v5,'execution-match-replay':v6,'reversal-execution-guard':v7,'timeout-release-guard':v8,'unreported-match-output':v9}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('wrong buyer signer', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 's', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [False, False, False, False, False]), ('both current / wrong buyer signer', {'version': 2, 'buyer_version': 2, 'seller_version': 2, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 's', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [False, False, False, False, False]), ('buyer rejects', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': False, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [False, False, False, False, False]), ('both current / buyer rejects', {'version': 2, 'buyer_version': 2, 'seller_version': 2, 'buyer_accept': False, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [False, False, False, False, False]), ('normal contract', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True]), ('both current', {'version': 2, 'buyer_version': 2, 'seller_version': 2, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True]), ('seller rejects', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': False, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True]), ('trade rejected', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': True, 'rejected': True, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True]), ('already executed', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': True, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True]), ('wrong seller signer', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 'b', 'match_id': 'm2', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True]), ('match replay', {'version': 2, 'buyer_version': 2, 'seller_version': 1, 'buyer_accept': True, 'seller_accept': True, 'rejected': False, 'executed': False, 'proposed': 5, 'held': 5, 'fill': 2, 'buyer': 'b', 'seller': 's', 'buyer_signer': 'b', 'seller_signer': 's', 'match_id': 'm1', 'last_match': 'm1', 'reversed': False, 'timeout': False, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [True, True, True, True, True])]
def vary(value):
 if type(value) is int: return value*N
 if isinstance(value,list): return [vary(v) for v in value]
 if isinstance(value,dict): return {k:(v if k in ['count', 'delivery_index', 'disputed', 'maximum_set', 'minimum_set', 'stage', 'threshold', 'waived'] else vary(v)) for k,v in value.items()}
 return value
for label, request, expected in fixtures:
 check(label, solve(vary(request))['buyer-confirmation-author'], expected[N-1])
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
wrong buyer signer	`False`	`False`	Passed
both current / wrong buyer signer	`False`	`False`	Passed
buyer rejects	`True`	`False`	Failed
both current / buyer rejects	`True`	`False`	Failed
normal contract	`True`	`True`	Passed
both current	`True`	`True`	Passed
seller rejects	`True`	`True`	Passed
trade rejected	`True`	`True`	Passed
already executed	`True`	`True`	Passed
wrong seller signer	`True`	`True`	Passed
match replay	`True`	`True`	Passed

SHA-256 / 2a2fbfe429690f874df6a8f8f58fde31c0aacff031057bf5a10b9de7ae6a7006

HELD IN THE MEMBER ARCHIVE

The verified repair and its recorded checks are member-only.

This mechanism has 11 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.

Every case sharing this mechanism uses the same contract and the same repair, so this one record is held back for all of them.

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

Verification & scope

Stipulated toy auction rules, not a venue specification, financial advice, optimization claim, or live trading implementation. Nonnegative integer inputs and internally aligned list fields only. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:46:14.451623+00:00.

Case digest / bf26ddfc24c71b53496f578c10e5a94362f2053fb7bb940171fe20c70fbebf29