#!/usr/bin/env python3 """ Emergency Boot Hardware Shim -- Reference Implementation Python I/O shim for the Geometry Emergency Boot Witness. Simulates the FPGA-based geometric scan, seed extraction, and emergency shell interface. Per Research Stack contract: - Lean owns all decisions (admissibility, gating, classification) - Python owns I/O (read JSON, write JSONL, call subprocess, format output) - This shim calls Lean via lake exe for decision logic and formats/stores results. Specification: GEOMETRY_EMERGENCY_BOOT_WITNESS_2026-04-08.md """ from __future__ import annotations import json import os import subprocess import sys from dataclasses import dataclass, asdict from enum import Enum, auto from typing import Optional, List, Dict, Any, Tuple # --------------------------------------------------------------------------- # Constants matching the Lean specification # --------------------------------------------------------------------------- AEM20940_THRESHOLD_MV = 60 # 60mV cold-start threshold TSM_WATCHDOWN_NS = 1 # 1ns watchdog countdown GALVANIC_ISOLATION_V = 350 # 350V isolation threshold CALCULATOR_POWER_MW = 100 # 100mW power consumption target MIN_BATTERY_PCT = 0.20 # 20% minimum charge SCAN_TIMEOUT_MS = 100 # 100ms scan target # Tiny IP Emergency Domain EMERGENCY_DOMAIN = 0x0D # Command opcodes OP_BOOT = 0x01 OP_SCAN = 0x02 OP_RECOVER = 0x03 OP_DIAG = 0x04 OP_STATUS = 0x05 OP_OPTICAL = 0x06 OP_FIBER = 0x07 OP_GRAPHENE = 0x08 OP_GAN = 0x09 OP_MEMRISTOR = 0x0A OP_VOLTAGE = 0x0B OP_EXIT = 0xFF # --------------------------------------------------------------------------- # Types # --------------------------------------------------------------------------- class BootPhase(Enum): idle = auto() power_fail = auto() calculator_mode = auto() scanning = auto() seed_ready = auto() reconstructing = auto() validated = auto() recovery_mode = auto() exiting = auto() class CommandResult(Enum): ok = auto() invalid = auto() busy = auto() error = auto() forbidden = auto() @dataclass class SolarPowerState: solar_input_voltage: float # V solar_input_current: float # mA power_generation: float # mW battery_level: float # 0-1 self_power_mode: bool @dataclass class PowerState: vcc_main: float # V watchdog_countdown: int # ns bridge_isolated: bool optical_path_priority: str # "hot" or "cold" active_hot_paths: int solar_state: SolarPowerState @dataclass class HexCoord: q: int r: int def to_spatial_hash(self) -> int: """Cantor pairing function.""" n = self.q + self.r k = self.r return (n * n + n + 2 * k) // 2 @dataclass class Capacitor: coord: HexCoord cap_class: str # "low", "medium", "high" topology: int # routing hash component dimensions: int # dimensional hash component @dataclass class StatusByte: power_ok: bool = False seed_valid: bool = False tsm_reconstructed: bool = False stark_valid: bool = False optical_path_hot: bool = True # True = hot priority outer_ring_healthy: bool = False em_neutrality_ok: bool = False voltage_comp_active: bool = False def encode(self) -> int: b = 0 if self.power_ok: b |= 0x01 if self.seed_valid: b |= 0x02 if self.tsm_reconstructed: b |= 0x04 if self.stark_valid: b |= 0x08 if not self.optical_path_hot: b |= 0x10 # inverted if self.outer_ring_healthy: b |= 0x20 if self.em_neutrality_ok: b |= 0x40 if self.voltage_comp_active: b |= 0x80 return b @classmethod def decode(cls, b: int) -> "StatusByte": return cls( power_ok=(b & 0x01) != 0, seed_valid=(b & 0x02) != 0, tsm_reconstructed=(b & 0x04) != 0, stark_valid=(b & 0x08) != 0, optical_path_hot=(b & 0x10) == 0, # inverted outer_ring_healthy=(b & 0x20) != 0, em_neutrality_ok=(b & 0x40) != 0, voltage_comp_active=(b & 0x80) != 0, ) # --------------------------------------------------------------------------- # Decision stubs (Lean owns decisions; these call Lean via subprocess) # --------------------------------------------------------------------------- def _call_lean_decision(function_name: str, args: List[str]) -> Tuple[bool, Any]: """Call a Lean decision function via lake exe. TODO(lean-port): Replace with direct Lean FFI when available. For now, this is a stub that returns default values for development. """ # In a production system, this would call: # lake exe SemanticsCli --decision EmergencyBoot.function_name [args] # For the reference implementation, we return safe defaults. return True, None def power_failure_detected(power: PowerState) -> bool: """Detect power failure using AEM20940 + TSM + bridge conditions. Lean source: EmergencyBootState.powerFailureDetected """ vcc_mv = power.vcc_main * 1000.0 return ( vcc_mv < AEM20940_THRESHOLD_MV and power.watchdog_countdown <= 0 and power.bridge_isolated ) def self_power_sufficient(solar: SolarPowerState) -> bool: """Check if solar power generation exceeds consumption target. Lean source: EmergencyBootState.selfPowerSufficient """ return ( solar.power_generation >= CALCULATOR_POWER_MW and solar.battery_level >= MIN_BATTERY_PCT ) # --------------------------------------------------------------------------- # Emergency Boot Engine # --------------------------------------------------------------------------- class EmergencyBootEngine: """Simulated FPGA emergency boot controller. This Python shim models the hardware behavior described in the GEOMETRY_EMERGENCY_BOOT_WITNESS specification. It is regenerable from source and carries NO admissibility logic. """ def __init__(self, capacitors: List[Capacitor]): self.capacitors = capacitors self.phase = BootPhase.idle self.seed: Optional[int] = None self.augmented_seed: Optional[int] = None self.isa_word: Optional[int] = None self.power = PowerState( vcc_main=3.3, watchdog_countdown=1000, bridge_isolated=False, optical_path_priority="hot", active_hot_paths=0, solar_state=SolarPowerState( solar_input_voltage=2.5, solar_input_current=50.0, power_generation=125.0, battery_level=0.85, self_power_mode=False, ), ) # -- Power management ------------------------------------------------- def update_power(self, vcc: float, solar_v: float, solar_ma: float, battery: float, isolated: bool) -> None: """Update power state from sensor readings.""" self.power.vcc_main = vcc self.power.solar_state.solar_input_voltage = solar_v self.power.solar_state.solar_input_current = solar_ma self.power.solar_state.battery_level = battery self.power.bridge_isolated = isolated self.power.solar_state.power_generation = solar_v * solar_ma # mW approx if power_failure_detected(self.power): self._enter_emergency_mode() def _enter_emergency_mode(self) -> None: """Transition to emergency calculator mode on power failure.""" if self.phase == BootPhase.idle: self.phase = BootPhase.power_fail self.power.optical_path_priority = "hot" self.power.active_hot_paths = 16 self.power.solar_state.self_power_mode = True if self_power_sufficient(self.power.solar_state): self.phase = BootPhase.calculator_mode self._start_scan() # -- Geometric scan --------------------------------------------------- def _start_scan(self) -> None: """Begin FPGA geometric scan of capacitor array.""" if self.phase == BootPhase.calculator_mode: self.phase = BootPhase.scanning # Simulate scan completion (in FPGA this is hardware-timed) self._complete_scan() def _complete_scan(self) -> None: """Finish scan and assemble geometric seed.""" spatial_acc = 0 cap_acc = 0 topo_acc = 0 dim_acc = 0 for cap in self.capacitors: spatial_acc ^= cap.coord.to_spatial_hash() cap_bits = {"low": 0b00, "medium": 0b01, "high": 0b10}.get( cap.cap_class, 0 ) cap_acc ^= cap_bits topo_acc ^= cap.topology dim_acc ^= cap.dimensions # Fold to 128-bit seed using rotation seed = ((spatial_acc << 32) ^ spatial_acc) seed = ((cap_acc << 24) ^ seed) seed = ((topo_acc << 48) ^ seed) seed = ((dim_acc << 24) ^ seed) self.seed = seed & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF self.phase = BootPhase.seed_ready # -- Command interface ------------------------------------------------ def execute(self, opcode: int, payload: bytes = b"") -> Tuple[CommandResult, StatusByte, bytes]: """Execute an emergency boot command. Mirrors Lean: EmergencyBootShell.executeCommand """ status = self._build_status() if opcode == OP_STATUS: return CommandResult.ok, status, bytes([status.encode()]) if opcode == OP_BOOT: if self.phase in (BootPhase.seed_ready, BootPhase.recovery_mode): if self.seed is not None: seed_bytes = self.seed.to_bytes(16, "big") return CommandResult.ok, status, seed_bytes return CommandResult.forbidden, status, b"" if opcode == OP_SCAN: if self.phase in (BootPhase.scanning, BootPhase.seed_ready, BootPhase.recovery_mode): return CommandResult.ok, status, b"" # geometry witness omitted return CommandResult.forbidden, status, b"" if opcode == OP_DIAG: return CommandResult.ok, status, b"" # diagnostic results omitted if opcode == OP_EXIT: if self.phase == BootPhase.recovery_mode: self.phase = BootPhase.exiting return CommandResult.ok, status, b"" return CommandResult.forbidden, status, b"" # RECOVER, OPTICAL, FIBER, GRAPHENE, GAN, MEMRISTOR, VOLTAGE if self.phase == BootPhase.recovery_mode: return CommandResult.ok, status, b"" return CommandResult.forbidden, status, b"" def _build_status(self) -> StatusByte: """Build status byte from current state.""" return StatusByte( power_ok=self.power.vcc_main >= 0.060, seed_valid=self.seed is not None, tsm_reconstructed=self.isa_word is not None, stark_valid=self.phase in (BootPhase.validated, BootPhase.recovery_mode), optical_path_hot=self.power.optical_path_priority == "hot", outer_ring_healthy=self.phase not in (BootPhase.idle, BootPhase.power_fail), em_neutrality_ok=self.phase != BootPhase.idle, voltage_comp_active=self.phase == BootPhase.recovery_mode, ) # -- Receipt generation ----------------------------------------------- def generate_receipt(self) -> Dict[str, Any]: """Generate a JSON receipt of the current boot state. Receipts are JSONL hash-chained per Research Stack convention. This is a hardware witness receipt, not a compression receipt. """ return { "schema": "emergency_boot_witness_v1", "phase": self.phase.name, "seed_present": self.seed is not None, "power": { "vcc_main_v": self.power.vcc_main, "solar_generation_mw": self.power.solar_state.power_generation, "battery_level": self.power.solar_state.battery_level, "self_power_mode": self.power.solar_state.self_power_mode, }, "status": self._build_status().encode(), "capacitor_count": len(self.capacitors), } # --------------------------------------------------------------------------- # Main / CLI # --------------------------------------------------------------------------- def main() -> int: """Demo: run a simulated emergency boot sequence.""" # Create a sample 16-capacitor hexagonal lattice capacitors: List[Capacitor] = [] for q in range(-2, 3): for r in range(-2, 3): if abs(q + r) <= 2: cap_class = ["low", "medium", "high"][(q + r + 4) % 3] capacitors.append(Capacitor( coord=HexCoord(q, r), cap_class=cap_class, topology=(q * 17 + r) & 0xFF, dimensions=(abs(q) + abs(r)) & 0xFF, )) engine = EmergencyBootEngine(capacitors) print("=== Emergency Boot Witness Demo ===") print(f"Capacitor array: {len(capacitors)} units") print(f"Initial phase: {engine.phase.name}") # Simulate power failure (watchdog already expired) print("\n-- Power Failure Event --") engine.power.watchdog_countdown = 0 # TSM watchdog expired engine.update_power( vcc=0.010, # 10mV (below 60mV threshold) solar_v=2.5, solar_ma=60.0, battery=0.85, isolated=True, ) print(f"Phase after power failure: {engine.phase.name}") print(f"Self-power mode: {engine.power.solar_state.self_power_mode}") print(f"Optical priority: {engine.power.optical_path_priority}") # Execute STATUS command print("\n-- STATUS Command --") result, status, payload = engine.execute(OP_STATUS) print(f"Result: {result.name}") print(f"Status byte: 0x{status.encode():02X}") print(f" power_ok={status.power_ok}, seed_valid={status.seed_valid}") # Execute BOOT command print("\n-- BOOT Command --") result, status, payload = engine.execute(OP_BOOT) print(f"Result: {result.name}") if payload: print(f"Seed: 0x{int.from_bytes(payload, 'big'):032X}") # Generate receipt print("\n-- Receipt --") receipt = engine.generate_receipt() print(json.dumps(receipt, indent=2)) return 0 if __name__ == "__main__": sys.exit(main())