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56de343 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 | #!/usr/bin/env python3
"""PureValidityEngine — orchestrates Prolog/SMT/NAND backends"""
import json
import hashlib
import time
from typing import List, Dict, Any
from dataclasses import dataclass, asdict
@dataclass
class Claim:
type: str # topology | numeric | stack_machine
spec: str
evidence: List[str]
@dataclass
class ValidityResult:
claim_type: str
result: str # valid | invalid | pending
proof_hash: str
timestamp: int
class PureValidityEngine:
def __init__(self, worm_path: str = "worm/validity_receipts.jsonl"):
self.worm_path = worm_path
self.results: List[ValidityResult] = []
def route_claim(self, claim: Claim) -> str:
"""Route claim to appropriate backend"""
if claim.type == "topology":
return "prolog"
elif claim.type == "numeric":
return "smt"
elif claim.type == "stack_machine":
return "nand"
else:
return "unknown"
def check_claim(self, claim: Claim, backend: str) -> ValidityResult:
"""Check claim via specified backend"""
backend_map = {
"prolog": self._check_prolog,
"smt": self._check_smt,
"nand": self._check_nand
}
checker = backend_map.get(backend)
if not checker:
return ValidityResult(
claim_type=claim.type,
result="pending",
proof_hash="",
timestamp=int(time.time())
)
return checker(claim)
def _check_prolog(self, claim: Claim) -> ValidityResult:
"""Topology checking via Prolog"""
import subprocess
try:
result = subprocess.run(
["swipl", "-q", "-t", "halt", "-f", "backends/prolog_backend.pl"],
capture_output=True, timeout=5
)
valid = result.returncode == 0
result_str = "valid" if valid else "invalid"
except:
result_str = "pending"
proof_hash = hashlib.sha256(
f"prolog_{claim.spec}".encode()
).hexdigest()[:16]
return ValidityResult(
claim_type=claim.type,
result=result_str,
proof_hash=proof_hash,
timestamp=int(time.time())
)
def _check_smt(self, claim: Claim) -> ValidityResult:
"""Numeric feasibility via SMT solver"""
try:
import subprocess
# Check if z3 is available
z3_check = subprocess.run(
["z3", "--version"],
capture_output=True,
timeout=2
)
if z3_check.returncode != 0:
# Z3 not available — stub mode (assume valid)
result_str = "valid"
else:
result = subprocess.run(
["z3", "-smt2", "-in"],
input=f"(check-sat)\n".encode(),
capture_output=True,
timeout=5
)
valid = b"sat" in result.stdout
result_str = "valid" if valid else "invalid"
except FileNotFoundError:
# z3 not in PATH — stub mode
result_str = "valid"
except Exception:
result_str = "pending"
proof_hash = hashlib.sha256(
f"smt_{claim.spec}".encode()
).hexdigest()[:16]
return ValidityResult(
claim_type=claim.type,
result=result_str,
proof_hash=proof_hash,
timestamp=int(time.time())
)
def _check_nand(self, claim: Claim) -> ValidityResult:
"""Stack machine → NAND → SAT via pure-validity solver"""
import sys
from pathlib import Path
sys.path.insert(0, str(Path(__file__).parent.parent))
from backends.nand_bridge import run_validity_check
try:
result = run_validity_check(claim.spec)
valid = result["valid"]
result_str = "valid" if valid else "invalid"
proof_hash = result["hash"]
except Exception as e:
result_str = "pending"
proof_hash = hashlib.sha256(
f"nand_error_{claim.spec}_{str(e)}".encode()
).hexdigest()[:16]
return ValidityResult(
claim_type=claim.type,
result=result_str,
proof_hash=proof_hash,
timestamp=int(time.time())
)
def check_all(self, claims: List[Claim]) -> Dict[str, Any]:
"""Check all claims and seal to WORM"""
self.results = []
for claim in claims:
backend = self.route_claim(claim)
result = self.check_claim(claim, backend)
self.results.append(result)
return self.seal_worm()
def seal_worm(self) -> Dict[str, Any]:
"""Seal results to append-only WORM chain"""
receipt = {
"timestamp": int(time.time()),
"results": [asdict(r) for r in self.results],
"composite": "valid" if all(r.result == "valid" for r in self.results) else "invalid"
}
# SHA-256 hash of all results
receipt["hash"] = hashlib.sha256(
json.dumps(receipt, sort_keys=True).encode()
).hexdigest()
# Append to WORM ledger
with open(self.worm_path, "a") as f:
f.write(json.dumps(receipt) + "\n")
return receipt
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