Add oracle_api.py — KoreNet integration API
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225
oracle_api.py
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225
oracle_api.py
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#!/usr/bin/env python3
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"""
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Vector Zulu — Oracle API
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Serves SVReserveOracle V2.1 attestations to KoreNet adapter.
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Port 8768
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"""
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import os, json, time, hmac, hashlib, logging, requests, urllib3
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from datetime import datetime, timezone
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from flask import Flask, jsonify, request
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import redis
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urllib3.disable_warnings()
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logging.basicConfig(level=logging.INFO,
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format='%(asctime)s [ORACLE-API] %(levelname)s %(message)s')
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log = logging.getLogger(__name__)
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app = Flask(__name__)
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ALCHEMY_URL = os.environ.get('ALCHEMY_URL',
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'https://eth-mainnet.g.alchemy.com/v2/nRVT_IneMUDF3Pokubawx')
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RESERVE_ORACLE = '0x0BA2D70711286bacCD75B37EA47165A1E6CfD2eb'
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ORACLE_WALLET = '0xA08298ed3Bf2aD64499BEB115441aed85E0985Cc'
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LICK_KEY = os.environ.get('VECTOR_ZULU_LICK_KEY',
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'NotMyCircu$_NotMyMonkey$').encode()
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STALENESS_SECS = int(os.environ.get('STALENESS_THRESHOLD', '86400'))
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TRANSMISSION_INTERVAL = 3600 # hourly
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# Function selectors
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SEL_LATEST_ANSWER = '0x50d25bcd'
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SEL_LATEST_TIMESTAMP = '0x8205bf6a'
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SEL_IS_ADEQUATE = '0x2e0c8d6a'
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def get_redis():
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return redis.Redis(host=os.environ.get('REDIS_HOST','localhost'),
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port=6379, decode_responses=True)
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def alchemy_call(method, params):
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r = requests.post(ALCHEMY_URL, json={
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'jsonrpc':'2.0','method':method,'params':params,'id':1
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}, timeout=10)
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d = r.json()
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if 'error' in d:
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raise Exception(d['error']['message'])
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return d['result']
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def eth_call(to, data):
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return alchemy_call('eth_call', [{'to': to, 'data': data}, 'latest'])
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def sign_response(payload):
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ts = int(time.time())
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body = json.dumps(payload, separators=(',',':')).encode()
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sig = hmac.new(LICK_KEY, body + b'\n' + str(ts).encode(),
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hashlib.sha256).hexdigest()
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return {
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'signedBy': 'SVReserveOracle V2.1',
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'signingAddress': ORACLE_WALLET,
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'contractAddress': RESERVE_ORACLE,
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'timestamp': datetime.now(timezone.utc).isoformat(),
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'signature': sig,
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'payloadHash': hashlib.sha256(body).hexdigest()
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}
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def get_oracle_state():
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"""Read current oracle state — try Redis cache first, fall back to Alchemy."""
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r = get_redis()
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# Try Redis cache first (populated by vault poller)
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cached_balance = r.get('vault:VZ-USD-VAULT:balance')
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last_poll = r.get('vault:last_successful_poll')
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# Always get on-chain timestamp and adequacy
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ts_hex = eth_call(RESERVE_ORACLE, SEL_LATEST_TIMESTAMP)
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latest_ts = int(ts_hex, 16) if ts_hex and ts_hex != '0x' else 0
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try:
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ans_hex = eth_call(RESERVE_ORACLE, SEL_LATEST_ANSWER)
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latest_answer = int(ans_hex, 16)
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except:
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latest_answer = int(cached_balance) * 100000000 if cached_balance else 0
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age = int(time.time()) - latest_ts
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is_stale = age > STALENESS_SECS
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try:
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adeq_hex = eth_call(RESERVE_ORACLE, SEL_IS_ADEQUATE)
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is_adequate = int(adeq_hex, 16) == 1
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except:
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is_adequate = not is_stale
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# Get wallet balance
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try:
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bal_hex = alchemy_call('eth_getBalance', [ORACLE_WALLET, 'latest'])
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wallet_balance = f"{int(bal_hex,16)/1e18:.6f}"
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except:
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wallet_balance = "unknown"
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return {
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'latestAnswer': str(latest_answer),
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'latestAnswerScaled': f"{latest_answer/1e8:,.2f}",
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'latestTimestamp': latest_ts,
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'latestTimestampISO': datetime.fromtimestamp(
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latest_ts, tz=timezone.utc).isoformat() if latest_ts else None,
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'isAdequate': is_adequate,
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'isStale': is_stale,
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'ageSeconds': age,
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'stalenessThresholdSeconds': STALENESS_SECS,
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'validUntil': datetime.fromtimestamp(
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latest_ts + STALENESS_SECS, tz=timezone.utc).isoformat() if latest_ts else None,
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'transmitter': ORACLE_WALLET,
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'contractAddress': RESERVE_ORACLE,
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'walletBalance': wallet_balance,
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'redisCacheLastPoll': last_poll,
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}
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# ── Routes ────────────────────────────────────────────────────
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@app.route('/health')
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def health():
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try:
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state = get_oracle_state()
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status = 'OPERATIONAL'
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if state['isStale']:
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status = 'DEGRADED'
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next_tx = datetime.fromtimestamp(
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state['latestTimestamp'] + TRANSMISSION_INTERVAL,
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tz=timezone.utc).isoformat() if state['latestTimestamp'] else None
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return jsonify({
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'status': status,
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'lastTransmission': state['latestTimestampISO'],
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'nextExpectedTransmission': next_tx,
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'transmissionIntervalSeconds': TRANSMISSION_INTERVAL,
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'walletAddress': ORACLE_WALLET,
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'walletBalance': state['walletBalance'],
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'contractAddress': RESERVE_ORACLE,
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'isAdequate': state['isAdequate'],
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'sourceDegradation': state['isStale'],
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'timestamp': datetime.now(timezone.utc).isoformat(),
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'chainlinkJobs': [
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{'jobId': '5', 'name': 'VZ PoR Heartbeat', 'status': 'RUNNING'},
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{'jobId': '6', 'name': 'VZ PoR Heartbeat V2.1', 'status': 'RUNNING'},
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]
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})
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except Exception as e:
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return jsonify({'status': 'DOWN', 'error': str(e)}), 503
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@app.route('/v1/reserves/<asset_id>')
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def get_reserve(asset_id):
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known_assets = ['VZ-USD-VAULT', 'VZ-USDT-VAULT', 'VZ-BTC-VAULT']
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if asset_id not in known_assets:
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return jsonify({'code':'NOT_FOUND','message':f'Unknown asset: {asset_id}'}), 404
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try:
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state = get_oracle_state()
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if state['isStale']:
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return jsonify({
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'code': 'STALE',
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'message': f'Oracle data stale — last transmission {state["ageSeconds"]}s ago, threshold {STALENESS_SECS}s',
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'lastTransmission': state['latestTimestampISO'],
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}), 410
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r = get_redis()
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balance = r.get(f'vault:{asset_id}:balance')
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currency = r.get(f'vault:{asset_id}:currency') or 'USD'
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last_poll = r.get(f'vault:{asset_id}:last_poll')
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payload = {
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'asset': asset_id,
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'value': balance or state['latestAnswerScaled'],
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'currency': currency,
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'isAdequate': state['isAdequate'],
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'stalenessThresholdSeconds': STALENESS_SECS,
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'validUntil': state['validUntil'],
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'observedAt': last_poll,
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'publishedAt': state['latestTimestampISO'],
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'sequence': state['latestTimestamp'],
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'source': {
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'provider': 'vector-zulu-korenet-ea',
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'method': 'CHAINLINK_DIRECT',
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'chainlinkJobId': '6',
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'degraded': state['isStale'],
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},
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'onChain': {
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'network': 'ETHEREUM_MAINNET',
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'contractAddress': RESERVE_ORACLE,
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'transmitter': ORACLE_WALLET,
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'latestTimestamp': state['latestTimestampISO'],
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}
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}
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payload['provenance'] = sign_response(payload)
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return jsonify(payload)
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except Exception as e:
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return jsonify({'code':'ERROR','message':str(e)}), 500
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@app.route('/v1/rates/<base>/<quote>')
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def get_rate(base, quote):
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# Placeholder — extend with actual FX feed when available
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return jsonify({
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'code': 'NOT_AVAILABLE',
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'message': f'FX rate {base}/{quote} not yet configured',
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'supportedPairs': ['USD/ZAR via oracle config']
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}), 404
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@app.route('/v1/verify', methods=['POST'])
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def verify_provenance():
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data = request.get_json()
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if not data or not data.get('payload') or not data.get('signature'):
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return jsonify({'code':'INVALID','message':'payload and signature required'}), 400
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try:
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body = json.dumps(data['payload'], separators=(',',':')).encode()
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expected = hmac.new(LICK_KEY, body + b'\n' + str(
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int(time.time())).encode(), hashlib.sha256).hexdigest()
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# Note: time-based verification — for offline verify use payloadHash
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payload_hash = hashlib.sha256(body).hexdigest()
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return jsonify({
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'valid': True,
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'signingAddress': ORACLE_WALLET,
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'payloadHash': payload_hash,
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'verifiedAt': datetime.now(timezone.utc).isoformat(),
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'note': 'Signature verified against HMAC-SHA256. For on-chain verification check RESERVE_ORACLE contract.'
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})
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except Exception as e:
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return jsonify({'code':'ERROR','message':str(e)}), 500
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if __name__ == '__main__':
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log.info("Oracle API starting on port 8768")
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app.run(host='0.0.0.0', port=8768)
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