企業はAIとブロックチェーンをどのように組み合わせてよりスマートな自動化を実現しているか

import json
from web3 import Web3
from openai import OpenAI

# Initialize web3 provider and client
w3 = Web3(Web3.HTTPProvider("https://sepolia.infura.io/v3/YOUR_PROJECT_ID"))
openai_client = OpenAI(api_key="YOUR_OPENAI_API_KEY")

# Smart Contract details
CONTRACT_ABI = json.loads('[{"inputs":[{"internalType":"string","name":"milestone","type":"string"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"triggerPayout","outputs":[],"stateMutability":"nonpayable","type":"function"}]')
CONTRACT_ADDRESS = "0xdeADBeef74222222222222222222222222222222"
agent_contract = w3.eth.contract(address=CONTRACT_ADDRESS, abi=CONTRACT_ABI)

# Private key stored in HSM/KMS for signing transactions
SENDER_ADDRESS = "0x1234567890123456789012345678901234567890"
PRIVATE_KEY = "0xYOUR_SECURE_AGENT_PRIVATE_KEY"

def analyze_telemetry_and_payout(telemetry_data: str):
    """
    Step 1: Use LLM to analyze unstructured cold-chain telemetry data.
    """
    prompt = f"""
    Analyze the following logistics telemetry log for a cold-chain pharmaceutical shipment.
    Determine if the temperature remained strictly below 8 degrees Celsius at all times.
    
    Telemetry Log:
    {telemetry_data}
    
    Output your decision as a valid JSON object with the keys:
    - 'passed_compliance': true/false
    - 'highest_recorded_temp': float
    - 'justification': string (brief summary)
    """
    
    response = openai_client.chat.completions.create(
        model="gpt-4o-mini",
        messages=[{"role": "user", "content": prompt}],
        response_format={"type": "json_object"}
    )
    
    analysis = json.loads(response.choices[0].message.content)
    print("AI Analysis Result:", json.dumps(analysis, indent=2))
    
    # Step 2: If compliance passes, trigger the blockchain smart contract payout
    if analysis["passed_compliance"]:
        trigger_blockchain_transaction("Milestone_Delivery_1", True)
    else:
        trigger_blockchain_transaction("Milestone_Delivery_1", False)

def trigger_blockchain_transaction(milestone: str, approved: bool):
    """
    Step 3: Construct, sign, and broadcast the transaction to the Ethereum network.
    """
    print(f"Constructing transaction: Milestone={milestone}, Approved={approved}...")
    
    # Build transaction dictionary
    tx = agent_contract.functions.triggerPayout(milestone, approved).build_transaction({
        'chainId': 11155111,  # Sepolia Testnet
        'gas': 100000,
        'maxFeePerGas': w3.to_wei('50', 'gwei'),
        'maxPriorityFeePerGas': w3.to_wei('2', 'gwei'),
        'nonce': w3.eth.get_transaction_count(SENDER_ADDRESS),
    })
    
    # Sign transaction with agent's private key
    signed_tx = w3.eth.account.sign_transaction(tx, private_key=PRIVATE_KEY)
    
    # Broadcast the transaction to the blockchain
    tx_hash = w3.eth.send_raw_transaction(signed_tx.raw_transaction)
    print(f"Transaction successfully broadcast! TX Hash: {w3.to_hex(tx_hash)}")
    
    # Wait for block confirmation
    receipt = w3.eth.wait_for_transaction_receipt(tx_hash)
    print(f"Transaction confirmed in block {receipt['blockNumber']} with status {receipt['status']}")

# Mock cold-chain telemetry payload
telemetry_log = """
[2026-06-21 12:00:00] Temp: 4.2 C - Status: OK
[2026-06-21 14:00:00] Temp: 5.1 C - Status: OK
[2026-06-21 16:00:00] Temp: 6.8 C - Status: OK
[2026-06-21 18:00:00] Temp: 7.2 C - Status: OK
"""

if __name__ == "__main__":
    analyze_telemetry_and_payout(telemetry_log)