feat: add marketplace metrics, privacy features, and service registry endpoints
- Add Prometheus metrics for marketplace API throughput and error rates with new dashboard panels - Implement confidential transaction models with encryption support and access control - Add key management system with registration, rotation, and audit logging - Create services and registry routers for service discovery and management - Integrate ZK proof generation for privacy-preserving receipts - Add metrics instru
This commit is contained in:
oib
474
research/prototypes/rollups/zk_rollup.py
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474
research/prototypes/rollups/zk_rollup.py
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"""
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ZK-Rollup Implementation for AITBC
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Provides scalability through zero-knowledge proof aggregation
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"""
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import asyncio
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import json
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import hashlib
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import time
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from datetime import datetime, timedelta
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from typing import Dict, List, Optional, Tuple
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from dataclasses import dataclass, asdict
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from enum import Enum
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import logging
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import random
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logging.basicConfig(level=logging.INFO)
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logger = logging.getLogger(__name__)
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class RollupStatus(Enum):
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"""Rollup status"""
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ACTIVE = "active"
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PROVING = "proving"
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COMMITTED = "committed"
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FINALIZED = "finalized"
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@dataclass
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class RollupTransaction:
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"""Transaction within rollup"""
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tx_hash: str
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from_address: str
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to_address: str
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amount: int
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gas_limit: int
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gas_price: int
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nonce: int
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data: str = ""
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timestamp: datetime = None
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def __post_init__(self):
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if self.timestamp is None:
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self.timestamp = datetime.utcnow()
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@dataclass
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class RollupBatch:
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"""Batch of transactions with ZK proof"""
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batch_id: int
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transactions: List[RollupTransaction]
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merkle_root: str
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zk_proof: str
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previous_state_root: str
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new_state_root: str
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timestamp: datetime
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status: RollupStatus = RollupStatus.ACTIVE
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@dataclass
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class AccountState:
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"""Account state in rollup"""
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address: str
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balance: int
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nonce: int
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storage_root: str
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class ZKRollup:
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"""ZK-Rollup implementation"""
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def __init__(self, layer1_address: str):
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self.layer1_address = layer1_address
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self.current_batch_id = 0
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self.pending_transactions: List[RollupTransaction] = []
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self.batches: Dict[int, RollupBatch] = {}
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self.account_states: Dict[str, AccountState] = {}
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self.status = RollupStatus.ACTIVE
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# Rollup parameters
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self.max_batch_size = 1000
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self.batch_interval = 60 # seconds
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self.proving_time = 30 # seconds (simulated)
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logger.info(f"Initialized ZK-Rollup at {layer1_address}")
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def deposit(self, address: str, amount: int) -> str:
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"""Deposit funds from Layer 1 to rollup"""
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# Create deposit transaction
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deposit_tx = RollupTransaction(
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tx_hash=self._generate_tx_hash("deposit", address, amount),
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from_address=self.layer1_address,
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to_address=address,
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amount=amount,
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gas_limit=21000,
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gas_price=0,
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nonce=len(self.pending_transactions),
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data="deposit"
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)
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# Update account state
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if address not in self.account_states:
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self.account_states[address] = AccountState(
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address=address,
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balance=0,
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nonce=0,
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storage_root=""
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)
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self.account_states[address].balance += amount
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logger.info(f"Deposited {amount} to {address}")
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return deposit_tx.tx_hash
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def submit_transaction(
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self,
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from_address: str,
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to_address: str,
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amount: int,
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gas_limit: int = 21000,
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gas_price: int = 20 * 10**9,
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data: str = ""
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) -> str:
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"""Submit transaction to rollup"""
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# Validate sender
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if from_address not in self.account_states:
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raise ValueError(f"Account {from_address} not found")
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sender_state = self.account_states[from_address]
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# Check balance
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total_cost = amount + (gas_limit * gas_price)
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if sender_state.balance < total_cost:
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raise ValueError("Insufficient balance")
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# Create transaction
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tx = RollupTransaction(
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tx_hash=self._generate_tx_hash("transfer", from_address, to_address, amount),
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from_address=from_address,
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to_address=to_address,
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amount=amount,
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gas_limit=gas_limit,
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gas_price=gas_price,
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nonce=sender_state.nonce,
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data=data
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)
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# Add to pending
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self.pending_transactions.append(tx)
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# Update nonce
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sender_state.nonce += 1
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logger.info(f"Submitted transaction {tx.tx_hash[:8]} from {from_address} to {to_address}")
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return tx.tx_hash
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async def create_batch(self) -> Optional[RollupBatch]:
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"""Create a batch from pending transactions"""
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if len(self.pending_transactions) == 0:
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return None
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# Take transactions for batch
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batch_txs = self.pending_transactions[:self.max_batch_size]
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self.pending_transactions = self.pending_transactions[self.max_batch_size:]
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# Calculate previous state root
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previous_state_root = self._calculate_state_root()
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# Process transactions
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new_states = self.account_states.copy()
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for tx in batch_txs:
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# Skip if account doesn't exist (except for deposits)
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if tx.from_address not in new_states and tx.data != "deposit":
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continue
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# Process transaction
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if tx.data == "deposit":
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# Deposits already handled in deposit()
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continue
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else:
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# Regular transfer
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sender = new_states[tx.from_address]
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receiver = new_states.get(tx.to_address)
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if receiver is None:
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receiver = AccountState(
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address=tx.to_address,
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balance=0,
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nonce=0,
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storage_root=""
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)
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new_states[tx.to_address] = receiver
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# Transfer amount
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gas_cost = tx.gas_limit * tx.gas_price
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sender.balance -= (tx.amount + gas_cost)
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receiver.balance += tx.amount
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# Update states
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self.account_states = new_states
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new_state_root = self._calculate_state_root()
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# Create merkle root
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merkle_root = self._calculate_merkle_root(batch_txs)
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# Create batch
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batch = RollupBatch(
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batch_id=self.current_batch_id,
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transactions=batch_txs,
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merkle_root=merkle_root,
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zk_proof="", # Will be generated
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previous_state_root=previous_state_root,
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new_state_root=new_state_root,
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timestamp=datetime.utcnow(),
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status=RollupStatus.PROVING
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)
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self.batches[self.current_batch_id] = batch
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self.current_batch_id += 1
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logger.info(f"Created batch {batch.batch_id} with {len(batch_txs)} transactions")
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return batch
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async def generate_zk_proof(self, batch: RollupBatch) -> str:
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"""Generate ZK proof for batch (simulated)"""
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logger.info(f"Generating ZK proof for batch {batch.batch_id}")
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# Simulate proof generation time
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await asyncio.sleep(self.proving_time)
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# Generate mock proof
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proof_data = {
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"batch_id": batch.batch_id,
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"state_transition": f"{batch.previous_state_root}->{batch.new_state_root}",
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"transaction_count": len(batch.transactions),
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"timestamp": datetime.utcnow().isoformat()
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}
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proof = hashlib.sha256(json.dumps(proof_data, sort_keys=True).encode()).hexdigest()
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# Update batch
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batch.zk_proof = proof
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batch.status = RollupStatus.COMMITTED
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logger.info(f"Generated ZK proof for batch {batch.batch_id}")
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return proof
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async def submit_to_layer1(self, batch: RollupBatch) -> bool:
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"""Submit batch to Layer 1 (simulated)"""
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logger.info(f"Submitting batch {batch.batch_id} to Layer 1")
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# Simulate network delay
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await asyncio.sleep(5)
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# Simulate success
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batch.status = RollupStatus.FINALIZED
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logger.info(f"Batch {batch.batch_id} finalized on Layer 1")
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return True
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def withdraw(self, address: str, amount: int) -> str:
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"""Withdraw funds from rollup to Layer 1"""
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if address not in self.account_states:
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raise ValueError(f"Account {address} not found")
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if self.account_states[address].balance < amount:
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raise ValueError("Insufficient balance")
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# Create withdrawal transaction
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withdraw_tx = RollupTransaction(
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tx_hash=self._generate_tx_hash("withdraw", address, amount),
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from_address=address,
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to_address=self.layer1_address,
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amount=amount,
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gas_limit=21000,
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gas_price=0,
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nonce=self.account_states[address].nonce,
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data="withdraw"
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)
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# Update balance
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self.account_states[address].balance -= amount
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self.account_states[address].nonce += 1
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# Add to pending transactions
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self.pending_transactions.append(withdraw_tx)
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logger.info(f"Withdrawal of {amount} initiated for {address}")
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return withdraw_tx.tx_hash
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def get_account_balance(self, address: str) -> int:
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"""Get account balance in rollup"""
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if address not in self.account_states:
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return 0
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return self.account_states[address].balance
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def get_pending_count(self) -> int:
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"""Get number of pending transactions"""
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return len(self.pending_transactions)
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def get_batch_status(self, batch_id: int) -> Optional[RollupStatus]:
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"""Get status of a batch"""
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if batch_id not in self.batches:
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return None
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return self.batches[batch_id].status
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def get_rollup_stats(self) -> Dict:
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"""Get rollup statistics"""
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total_txs = sum(len(batch.transactions) for batch in self.batches.values())
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total_accounts = len(self.account_states)
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total_balance = sum(state.balance for state in self.account_states.values())
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return {
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"current_batch_id": self.current_batch_id,
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"total_batches": len(self.batches),
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"total_transactions": total_txs,
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"pending_transactions": len(self.pending_transactions),
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"total_accounts": total_accounts,
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"total_balance": total_balance,
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"status": self.status.value
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}
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def _generate_tx_hash(self, *args) -> str:
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"""Generate transaction hash"""
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data = "|".join(str(arg) for arg in args)
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return hashlib.sha256(data.encode()).hexdigest()
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def _calculate_merkle_root(self, transactions: List[RollupTransaction]) -> str:
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"""Calculate merkle root of transactions"""
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if not transactions:
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return hashlib.sha256(b"").hexdigest()
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tx_hashes = []
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for tx in transactions:
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tx_data = {
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"from": tx.from_address,
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"to": tx.to_address,
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"amount": tx.amount,
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"nonce": tx.nonce
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}
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tx_hash = hashlib.sha256(json.dumps(tx_data, sort_keys=True).encode()).hexdigest()
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tx_hashes.append(tx_hash)
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# Build merkle tree
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while len(tx_hashes) > 1:
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next_level = []
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for i in range(0, len(tx_hashes), 2):
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left = tx_hashes[i]
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right = tx_hashes[i + 1] if i + 1 < len(tx_hashes) else left
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combined = hashlib.sha256((left + right).encode()).hexdigest()
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next_level.append(combined)
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tx_hashes = next_level
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return tx_hashes[0]
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def _calculate_state_root(self) -> str:
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"""Calculate state root"""
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if not self.account_states:
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return hashlib.sha256(b"").hexdigest()
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# Create sorted list of account states
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states = []
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for address, state in sorted(self.account_states.items()):
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state_data = {
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"address": address,
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"balance": state.balance,
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"nonce": state.nonce
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}
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state_hash = hashlib.sha256(json.dumps(state_data, sort_keys=True).encode()).hexdigest()
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states.append(state_hash)
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# Reduce to single root
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while len(states) > 1:
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next_level = []
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for i in range(0, len(states), 2):
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left = states[i]
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right = states[i + 1] if i + 1 < len(states) else left
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combined = hashlib.sha256((left + right).encode()).hexdigest()
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next_level.append(combined)
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states = next_level
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return states[0]
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async def run_rollup(self, duration_seconds: int = 300):
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"""Run rollup for specified duration"""
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logger.info(f"Running ZK-Rollup for {duration_seconds} seconds")
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start_time = time.time()
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batch_count = 0
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while time.time() - start_time < duration_seconds:
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# Create batch if enough transactions
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if len(self.pending_transactions) >= 10 or \
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(len(self.pending_transactions) > 0 and time.time() - start_time > 30):
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# Create and process batch
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batch = await self.create_batch()
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if batch:
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# Generate proof
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await self.generate_zk_proof(batch)
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# Submit to Layer 1
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await self.submit_to_layer1(batch)
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batch_count += 1
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# Small delay
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await asyncio.sleep(1)
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# Print stats
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stats = self.get_rollup_stats()
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logger.info(f"\n=== Rollup Statistics ===")
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logger.info(f"Batches processed: {batch_count}")
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logger.info(f"Total transactions: {stats['total_transactions']}")
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logger.info(f"Average TPS: {stats['total_transactions'] / duration_seconds:.2f}")
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logger.info(f"Total accounts: {stats['total_accounts']}")
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return stats
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async def main():
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"""Main function to run ZK-Rollup simulation"""
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logger.info("Starting ZK-Rollup Simulation")
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# Create rollup
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rollup = ZKRollup("0x1234...5678")
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# Create test accounts
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accounts = [f"user_{i:04d}" for i in range(100)]
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# Deposit initial funds
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for account in accounts[:50]:
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amount = random.randint(100, 1000) * 10**18
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rollup.deposit(account, amount)
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# Generate transactions
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logger.info("Generating test transactions...")
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for i in range(500):
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from_account = random.choice(accounts[:50])
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to_account = random.choice(accounts)
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amount = random.randint(1, 100) * 10**18
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try:
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rollup.submit_transaction(
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from_address=from_account,
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to_address=to_account,
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amount=amount,
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gas_limit=21000,
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gas_price=20 * 10**9
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)
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except ValueError as e:
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# Skip invalid transactions
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pass
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# Run rollup
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stats = await rollup.run_rollup(duration_seconds=60)
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# Print final stats
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logger.info("\n=== Final Statistics ===")
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for key, value in stats.items():
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logger.info(f"{key}: {value}")
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if __name__ == "__main__":
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asyncio.run(main())
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