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FA-57231 / Auction allocation rules / Open access

Bilateral confirmation: timeout release guard · case 01

Confirmation timeout releases a completed trade reservation.

Verified by executionVariant 1 · 10 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Confirmation timeout releases a completed trade reservation.

VERIFIED REPAIR

For timeout release guard, apply the stipulated decision x["held"] if x["timeout"] and not x["executed"] else 0.

Unsuccessful approach: The attempted repair uses x["held"] if not x["executed"] else 0; 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 timeout-release-guard: For timeout release guard, apply the stipulated decision x["held"] if x["timeout"] and not x["executed"] else 0.

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_signer"]==x["buyer"] and 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"] 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 = [('already executed / confirmation timeout', {'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': True, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0])]
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))['timeout-release-guard'], 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 fixtureActualExpectedOutcome
already executed / confirmation timeout50Failed
normal contract00Passed
both current00Passed
buyer rejects00Passed
seller rejects00Passed
trade rejected00Passed
already executed00Passed
wrong buyer signer00Passed
wrong seller signer00Passed
match replay00Passed

SHA-256 / 93d43365945004d2e10899c79d8d2ba5cf410c4faf25e5ac64fa79bf633af427

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"] and 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 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 = [('already executed / confirmation timeout', {'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': True, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0])]
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))['timeout-release-guard'], 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 fixtureActualExpectedOutcome
already executed / confirmation timeout00Passed
normal contract50Failed
both current50Failed
buyer rejects50Failed
seller rejects50Failed
trade rejected50Failed
already executed00Passed
wrong buyer signer50Failed
wrong seller signer50Failed
match replay50Failed

SHA-256 / 3e47098cad258e745c4d16aa3a90fc853d018c472062988cf99634b02a1ecf12

3 / The verified repair

Exit 0
"""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"] and 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 = [('already executed / confirmation timeout', {'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': True, 'reported': ['m1'], 'matched': ['m1', 'm2'], 'seller_delegates': ['agent']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0]), ('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']}, [0, 0, 0, 0, 0])]
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))['timeout-release-guard'], 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 fixtureActualExpectedOutcome
already executed / confirmation timeout00Passed
normal contract00Passed
both current00Passed
buyer rejects00Passed
seller rejects00Passed
trade rejected00Passed
already executed00Passed
wrong buyer signer00Passed
wrong seller signer00Passed
match replay00Passed

SHA-256 / 37b7137e9d665654dac999217ada2e545dab705702492682e131b135a6f4d247

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 2026-09-29T14:46:14.661017+00:00.

Case digest / 9915a24dda603ed072374f078aa0d0ff024ddf89ac25afff951af065926c6524