This guide covers integration with major cross-chain bridge protocols and infrastructure platforms that enable seamless asset transfers and trading across multiple blockchain networks. These platforms are essential for multi-chain trading strategies and liquidity optimization.
from pt_exchanges import HopProtocolExchange
import web3
from web3 import Web3
import json
import time
from datetime import datetime
# Hop Protocol Configuration
HOP_CONFIG = {
'ethereum_rpc': 'https://mainnet.infura.io/v3/YOUR_INFURA_KEY',
'polygon_rpc': 'https://polygon-rpc.com',
'arbitrum_rpc': 'https://arb1.arbitrum.io/rpc',
'optimism_rpc': 'https://mainnet.optimism.io',
# Hop Bridge contracts per network
'bridges': {
'USDC': {
'ethereum': '0x3666f603Cc164936C1b87e207F36BDa3F2a45632',
'polygon': '0x25D8039bB044dC227f741a9e381CA4cEAE2E6aE8',
'arbitrum': '0x0e0E3d2C5c292161999474247956EF542caBF8dd',
'optimism': '0xa81D244A1814468C734E5b4101F7b9c0c577a8fC'
},
'USDT': {
'ethereum': '0x3E4a3a4796d16c0Cd582C382691998f7c06420B6',
'polygon': '0x8741Ba6225A6BF91f9D73531A98A89807857a2B1',
'arbitrum': '0x72209Fe68386b37A40d6bCA04f78356fd342491f',
'optimism': '0x46ae9BaB8CEA96610807a275EBD36616B284f6aD'
},
'ETH': {
'ethereum': '0xb8901acB165ed027E32754E0FFe830802919727f',
'polygon': '0xb98454270065A31D71Bf635F6F7Ee6A518dFb849',
'arbitrum': '0x3749C4f034022c39ecafFaBA182555d4508caCCC',
'optimism': '0x83f6244Bd87662118d96D9a6D44f09dffF14b30E'
}
},
# AMM addresses for each token bridge
'amm_pools': {
'USDC': {
'polygon': '0x76b22b8C1079A44F1211D867D68b1eda76a635A7',
'arbitrum': '0x10541b07d8Ad2647Dc6cD67abd4c03575dade261',
'optimism': '0x2ad09850b0CA4c7c1B33f5AcD6cBAbCaB5d6e796'
}
},
# Chain IDs
'chain_ids': {
'ethereum': 1,
'polygon': 137,
'arbitrum': 42161,
'optimism': 10,
'gnosis': 100
}
}
class HopProtocolExchange:
def __init__(self, config):
self.wallet_address = config['wallet_address']
self.private_key = config['private_key']
# Initialize multi-chain web3 connections
self.web3_connections = {}
for chain, rpc_url in HOP_CONFIG.items():
if chain.endswith('_rpc'):
chain_name = chain.replace('_rpc', '')
self.web3_connections[chain_name] = Web3(Web3.HTTPProvider(rpc_url))
# Load ABIs
self.bridge_abi = self.load_abi('hop_bridge')
self.amm_abi = self.load_abi('hop_amm')
self.erc20_abi = self.load_abi('erc20')
# Initialize bridge contracts for each chain and token
self.bridge_contracts = {}
self.amm_contracts = {}
for token, bridges in HOP_CONFIG['bridges'].items():
self.bridge_contracts[token] = {}
for chain, address in bridges.items():
if chain in self.web3_connections:
self.bridge_contracts[token][chain] = self.web3_connections[chain].eth.contract(
address=address,
abi=self.bridge_abi
)
def get_transfer_quote(self, token, from_chain, to_chain, amount):
"""Get quote for cross-chain transfer via Hop Protocol"""
if from_chain == 'ethereum':
# L1 to L2 transfer
return self.get_l1_to_l2_quote(token, to_chain, amount)
elif to_chain == 'ethereum':
# L2 to L1 transfer
return self.get_l2_to_l1_quote(token, from_chain, amount)
else:
# L2 to L2 transfer (via AMM)
return self.get_l2_to_l2_quote(token, from_chain, to_chain, amount)
def get_l1_to_l2_quote(self, token, to_chain, amount):
"""Get quote for L1 to L2 transfer"""
bridge = self.bridge_contracts[token]['ethereum']
try:
# Get transfer fee
relayer_fee = bridge.functions.getTransferFee(
HOP_CONFIG['chain_ids'][to_chain],
amount
).call()
# Calculate amount out (amount - relayer fee)
amount_out = max(0, amount - relayer_fee)
# Get gas estimate
gas_estimate = bridge.functions.sendToL2(
HOP_CONFIG['chain_ids'][to_chain],
self.wallet_address,
amount,
0, # amountOutMin
int(time.time()) + 3600, # deadline
self.wallet_address, # relayer
relayer_fee
).estimateGas({'from': self.wallet_address})
return {
'amount_in': amount,
'amount_out': amount_out,
'relayer_fee': relayer_fee,
'gas_estimate': gas_estimate,
'estimated_time': '10-20 minutes', # L1 to L2 typical time
'from_chain': 'ethereum',
'to_chain': to_chain,
'token': token
}
except Exception as e:
print(f"Error getting L1 to L2 quote: {e}")
return None
def get_l2_to_l1_quote(self, token, from_chain, amount):
"""Get quote for L2 to L1 transfer"""
bridge = self.bridge_contracts[token][from_chain]
try:
# For L2 to L1, there are two options:
# 1. Fast exit via AMM (more expensive but faster)
# 2. Canonical exit (cheaper but slower, 7 days for optimistic rollups)
# Get AMM quote for fast exit
amm_address = HOP_CONFIG['amm_pools'][token].get(from_chain)
if amm_address:
amm_contract = self.web3_connections[from_chain].eth.contract(
address=amm_address,
abi=self.amm_abi
)
# Get AMM swap quote (hToken to canonical token)
dy = amm_contract.functions.calculateSwap(
1, # hToken index
0, # canonical token index
amount
).call()
fast_exit_amount = dy
fast_exit_time = '15-30 minutes'
else:
fast_exit_amount = 0
fast_exit_time = 'Not available'
# Calculate canonical exit (no fees but long wait)
canonical_amount = amount # No fees for canonical exit
canonical_time = '7 days' # Challenge period
return {
'amount_in': amount,
'fast_exit': {
'amount_out': fast_exit_amount,
'estimated_time': fast_exit_time,
'method': 'AMM'
},
'canonical_exit': {
'amount_out': canonical_amount,
'estimated_time': canonical_time,
'method': 'Native bridge'
},
'from_chain': from_chain,
'to_chain': 'ethereum',
'token': token
}
except Exception as e:
print(f"Error getting L2 to L1 quote: {e}")
return None
def get_l2_to_l2_quote(self, token, from_chain, to_chain, amount):
"""Get quote for L2 to L2 transfer via AMM"""
bridge = self.bridge_contracts[token][from_chain]
amm_address = HOP_CONFIG['amm_pools'][token].get(from_chain)
if not amm_address:
return None
try:
# Get transfer root for destination chain
transfer_root = bridge.functions.getTransferRoot(
HOP_CONFIG['chain_ids'][to_chain]
).call()
# Calculate fees for L2 to L2 transfer
bonder_fee = bridge.functions.getBonderFee(
HOP_CONFIG['chain_ids'][to_chain],
amount
).call()
amount_after_fees = amount - bonder_fee
return {
'amount_in': amount,
'amount_out': amount_after_fees,
'bonder_fee': bonder_fee,
'estimated_time': '5-15 minutes',
'from_chain': from_chain,
'to_chain': to_chain,
'token': token,
'method': 'L2-to-L2 via AMM'
}
except Exception as e:
print(f"Error getting L2 to L2 quote: {e}")
return None
def execute_transfer(self, token, from_chain, to_chain, amount, quote, method='fast'):
"""Execute cross-chain transfer via Hop Protocol"""
bridge = self.bridge_contracts[token][from_chain]
web3_conn = self.web3_connections[from_chain]
# Approve token spending
if token != 'ETH':
token_address = self.get_token_address(token, from_chain)
self.ensure_token_approval(token_address, amount, bridge.address, from_chain)
try:
if from_chain == 'ethereum':
# L1 to L2 transfer
tx = self.execute_l1_to_l2_transfer(token, to_chain, amount, quote)
elif to_chain == 'ethereum':
# L2 to L1 transfer
tx = self.execute_l2_to_l1_transfer(token, from_chain, amount, quote, method)
else:
# L2 to L2 transfer
tx = self.execute_l2_to_l2_transfer(token, from_chain, to_chain, amount, quote)
print(f"Hop transfer initiated: {tx}")
return tx
except Exception as e:
print(f"Error executing transfer: {e}")
return None
def execute_l1_to_l2_transfer(self, token, to_chain, amount, quote):
"""Execute L1 to L2 transfer"""
bridge = self.bridge_contracts[token]['ethereum']
web3_conn = self.web3_connections['ethereum']
transaction = bridge.functions.sendToL2(
HOP_CONFIG['chain_ids'][to_chain],
self.wallet_address,
amount,
int(quote['amount_out'] * 0.95), # 5% slippage tolerance
int(time.time()) + 3600, # 1 hour deadline
self.wallet_address, # relayer
quote['relayer_fee']
).build_transaction({
'from': self.wallet_address,
'gas': quote['gas_estimate'],
'gasPrice': web3_conn.eth.gas_price,
'nonce': web3_conn.eth.get_transaction_count(self.wallet_address),
'value': amount if token == 'ETH' else 0
})
signed_tx = web3_conn.eth.account.sign_transaction(transaction, self.private_key)
tx_hash = web3_conn.eth.send_raw_transaction(signed_tx.rawTransaction)
receipt = web3_conn.eth.wait_for_transaction_receipt(tx_hash)
return receipt
def execute_l2_to_l1_transfer(self, token, from_chain, amount, quote, method='fast'):
"""Execute L2 to L1 transfer"""
bridge = self.bridge_contracts[token][from_chain]
web3_conn = self.web3_connections[from_chain]
if method == 'fast' and quote['fast_exit']['amount_out'] > 0:
# Use AMM for fast exit
amm_address = HOP_CONFIG['amm_pools'][token][from_chain]
amm_contract = web3_conn.eth.contract(address=amm_address, abi=self.amm_abi)
# First send to L2 AMM
send_tx = bridge.functions.send(
HOP_CONFIG['chain_ids'][from_chain], # Same chain (to AMM)
self.wallet_address,
amount,
0, # bonderFee (none for same chain)
int(time.time()) + 1800, # 30 min deadline
0 # transferNonce
).build_transaction({
'from': self.wallet_address,
'gas': 300000,
'gasPrice': web3_conn.eth.gas_price,
'nonce': web3_conn.eth.get_transaction_count(self.wallet_address)
})
signed_tx = web3_conn.eth.account.sign_transaction(send_tx, self.private_key)
tx_hash = web3_conn.eth.send_raw_transaction(signed_tx.rawTransaction)
receipt = web3_conn.eth.wait_for_transaction_receipt(tx_hash)
return receipt
else:
# Use canonical bridge (7 day wait)
withdraw_tx = bridge.functions.withdraw(
self.wallet_address,
amount,
'0x', # transferRootHash (empty for direct withdrawal)
0 # transferIdTreeIndex
).build_transaction({
'from': self.wallet_address,
'gas': 200000,
'gasPrice': web3_conn.eth.gas_price,
'nonce': web3_conn.eth.get_transaction_count(self.wallet_address)
})
signed_tx = web3_conn.eth.account.sign_transaction(withdraw_tx, self.private_key)
tx_hash = web3_conn.eth.send_raw_transaction(signed_tx.rawTransaction)
receipt = web3_conn.eth.wait_for_transaction_receipt(tx_hash)
return receipt
# Initialize Hop Protocol
hop = HopProtocolExchange({
'wallet_address': 'your_wallet_address',
'private_key': 'your_private_key'
})
# LI.FI Protocol Configuration
LIFI_CONFIG = {
'api_base': 'https://li.quest/v1',
'widget_url': 'https://transferto.xyz/embed',
'supported_chains': [
'ethereum', 'polygon', 'arbitrum', 'optimism', 'avalanche',
'fantom', 'bsc', 'gnosis', 'moonbeam', 'celo', 'fuse',
'cronos', 'evmos', 'milkomeda', 'moonriver', 'boba',
'aurora', 'harmony', 'syscoin', 'velas', 'metis'
],
'chain_ids': {
'ethereum': 1, 'polygon': 137, 'arbitrum': 42161, 'optimism': 10,
'avalanche': 43114, 'fantom': 250, 'bsc': 56, 'gnosis': 100,
'moonbeam': 1284, 'celo': 42220, 'fuse': 122, 'cronos': 25
}
}
class LiFiExchange:
def __init__(self, config):
self.wallet_address = config['wallet_address']
self.private_key = config['private_key']
self.api_key = config.get('api_key') # Optional for rate limits
# Initialize web3 connections for major chains
self.web3_connections = {
'ethereum': Web3(Web3.HTTPProvider(config['ethereum_rpc'])),
'polygon': Web3(Web3.HTTPProvider(config['polygon_rpc'])),
'arbitrum': Web3(Web3.HTTPProvider(config['arbitrum_rpc'])),
'avalanche': Web3(Web3.HTTPProvider(config['avalanche_rpc']))
}
def get_chains(self):
"""Get all supported chains from LI.FI"""
try:
response = requests.get(f"{LIFI_CONFIG['api_base']}/chains")
if response.status_code == 200:
chains = response.json()
return {
chain['key']: {
'id': chain['id'],
'name': chain['name'],
'coin': chain['nativeCurrency']['symbol'],
'logo': chain['logoURI'],
'rpc_urls': chain.get('metamask', {}).get('rpcUrls', []),
'block_explorer': chain.get('metamask', {}).get('blockExplorerUrls', [])
}
for chain in chains['chains']
}
except Exception as e:
print(f"Error fetching chains: {e}")
return {}
def get_tokens(self, chain_key):
"""Get supported tokens for a specific chain"""
try:
chain_id = LIFI_CONFIG['chain_ids'].get(chain_key)
if not chain_id:
return {}
response = requests.get(f"{LIFI_CONFIG['api_base']}/tokens", params={'chains': chain_id})
if response.status_code == 200:
data = response.json()
tokens = data.get('tokens', {}).get(str(chain_id), [])
return {
token['symbol']: {
'address': token['address'],
'decimals': token['decimals'],
'name': token['name'],
'logo': token.get('logoURI'),
'price_usd': token.get('priceUSD', 0)
}
for token in tokens
}
except Exception as e:
print(f"Error fetching tokens: {e}")
return {}
def get_quote(self, from_chain, to_chain, from_token, to_token, amount, from_address=None):
"""Get cross-chain swap quote via LI.FI aggregator"""
from_chain_id = LIFI_CONFIG['chain_ids'][from_chain]
to_chain_id = LIFI_CONFIG['chain_ids'][to_chain]
# Get token information
from_tokens = self.get_tokens(from_chain)
to_tokens = self.get_tokens(to_chain)
from_token_info = from_tokens.get(from_token)
to_token_info = to_tokens.get(to_token)
if not from_token_info or not to_token_info:
raise ValueError("Token not supported on specified chain")
# Convert amount to token units
amount_in_units = int(amount * (10 ** from_token_info['decimals']))
params = {
'fromChain': from_chain_id,
'toChain': to_chain_id,
'fromToken': from_token_info['address'],
'toToken': to_token_info['address'],
'fromAmount': str(amount_in_units),
'fromAddress': from_address or self.wallet_address,
'toAddress': self.wallet_address,
'options': {
'bridges': ['hop', 'connext', 'across', 'stargate', 'anyswap', 'cbridge'],
'exchanges': ['1inch', 'paraswap', '0x', 'dodo', 'openocean'],
'allowSwitchChain': True,
'integrator': 'powertrader-ai'
}
}
try:
response = requests.post(
f"{LIFI_CONFIG['api_base']}/quote",
json=params,
headers={'Content-Type': 'application/json'}
)
if response.status_code == 200:
quote_data = response.json()
return {
'id': quote_data['id'],
'type': quote_data['type'],
'tool': quote_data['tool'],
'from_chain': from_chain,
'to_chain': to_chain,
'from_token': from_token,
'to_token': to_token,
'from_amount': amount,
'to_amount': float(quote_data['estimate']['toAmount']) / (10 ** to_token_info['decimals']),
'from_amount_usd': quote_data['estimate']['fromAmountUSD'],
'to_amount_usd': quote_data['estimate']['toAmountUSD'],
'gas_cost_usd': quote_data['estimate']['gasCosts'][0]['amountUSD'],
'execution_duration': quote_data['estimate']['executionDuration'],
'approval': quote_data.get('transactionRequest'),
'routes': quote_data.get('includedSteps', []),
'slippage': quote_data['estimate']['slippage'],
'fee_cost_usd': quote_data['estimate']['feeCosts'][0]['amountUSD'] if quote_data['estimate']['feeCosts'] else 0
}
except Exception as e:
print(f"Error getting quote: {e}")
return None
def execute_transfer(self, quote):
"""Execute cross-chain transfer using LI.FI route"""
if not quote:
raise ValueError("Invalid quote provided")
from_chain = quote['from_chain']
web3_conn = self.web3_connections.get(from_chain)
if not web3_conn:
raise ValueError(f"No web3 connection for chain: {from_chain}")
try:
# Get execution steps
steps_response = requests.get(
f"{LIFI_CONFIG['api_base']}/status",
params={'bridge': quote['id']}
)
if steps_response.status_code != 200:
raise ValueError("Failed to get execution steps")
execution_data = steps_response.json()
# Execute each step
for step_idx, step in enumerate(execution_data['steps']):
print(f"Executing step {step_idx + 1}/{len(execution_data['steps'])}: {step['type']}")
if step['type'] == 'swap':
# On-chain swap step
tx_result = self.execute_swap_step(step, web3_conn)
elif step['type'] == 'cross':
# Cross-chain bridge step
tx_result = self.execute_bridge_step(step, web3_conn)
if not tx_result:
raise ValueError(f"Step {step_idx + 1} failed")
print(f"Step {step_idx + 1} completed: {tx_result}")
return {
'success': True,
'quote_id': quote['id'],
'execution_steps': len(execution_data['steps']),
'final_transaction': tx_result
}
except Exception as e:
print(f"Error executing transfer: {e}")
return {'success': False, 'error': str(e)}
def execute_swap_step(self, step, web3_conn):
"""Execute on-chain swap step"""
tx_data = step['transactionRequest']
transaction = {
'from': self.wallet_address,
'to': tx_data['to'],
'data': tx_data['data'],
'value': int(tx_data.get('value', '0x0'), 16),
'gas': int(tx_data.get('gasLimit', '0x0'), 16),
'gasPrice': web3_conn.eth.gas_price,
'nonce': web3_conn.eth.get_transaction_count(self.wallet_address)
}
signed_tx = web3_conn.eth.account.sign_transaction(transaction, self.private_key)
tx_hash = web3_conn.eth.send_raw_transaction(signed_tx.rawTransaction)
receipt = web3_conn.eth.wait_for_transaction_receipt(tx_hash)
return receipt.transactionHash.hex()
def execute_bridge_step(self, step, web3_conn):
"""Execute cross-chain bridge step"""
tx_data = step['transactionRequest']
# Similar to swap step but may require additional monitoring
transaction = {
'from': self.wallet_address,
'to': tx_data['to'],
'data': tx_data['data'],
'value': int(tx_data.get('value', '0x0'), 16),
'gas': int(tx_data.get('gasLimit', '0x0'), 16),
'gasPrice': web3_conn.eth.gas_price,
'nonce': web3_conn.eth.get_transaction_count(self.wallet_address)
}
signed_tx = web3_conn.eth.account.sign_transaction(transaction, self.private_key)
tx_hash = web3_conn.eth.send_raw_transaction(signed_tx.rawTransaction)
receipt = web3_conn.eth.wait_for_transaction_receipt(tx_hash)
# Monitor bridge completion
self.monitor_bridge_completion(step, receipt.transactionHash.hex())
return receipt.transactionHash.hex()
def monitor_bridge_completion(self, bridge_step, tx_hash):
"""Monitor cross-chain bridge completion"""
bridge_id = bridge_step.get('bridgeId') or bridge_step.get('tool')
print(f"Monitoring bridge completion for {bridge_id}...")
max_attempts = 60 # 30 minutes with 30s intervals
attempt = 0
while attempt < max_attempts:
try:
status_response = requests.get(
f"{LIFI_CONFIG['api_base']}/status",
params={
'bridge': bridge_id,
'txHash': tx_hash
}
)
if status_response.status_code == 200:
status_data = status_response.json()
if status_data['status'] == 'DONE':
print(f"✅ Bridge completed successfully")
return True
elif status_data['status'] == 'FAILED':
print(f"❌ Bridge failed: {status_data.get('message', 'Unknown error')}")
return False
else:
print(f"BRIDGE: Bridge status: {status_data['status']}")
except Exception as e:
print(f"Error monitoring bridge: {e}")
time.sleep(30)
attempt += 1
print(f"⏰ Bridge monitoring timeout")
return False
def get_gas_recommendations(self, chain):
"""Get gas price recommendations for a chain"""
try:
web3_conn = self.web3_connections.get(chain)
if not web3_conn:
return None
current_gas = web3_conn.eth.gas_price
# Simple gas price strategy (can be enhanced with external APIs)
return {
'slow': int(current_gas * 0.8),
'standard': current_gas,
'fast': int(current_gas * 1.2),
'instant': int(current_gas * 1.5)
}
except Exception as e:
print(f"Error getting gas recommendations: {e}")
return None
# Initialize LI.FI
lifi = LiFiExchange({
'wallet_address': 'your_wallet_address',
'private_key': 'your_private_key',
'ethereum_rpc': 'https://mainnet.infura.io/v3/YOUR_KEY',
'polygon_rpc': 'https://polygon-rpc.com',
'arbitrum_rpc': 'https://arb1.arbitrum.io/rpc',
'avalanche_rpc': 'https://api.avax.network/ext/bc/C/rpc'
})
def cross_chain_yield_optimization():
"""
Optimize yield across multiple chains using cross-chain infrastructure
"""
print("🌐 Cross-Chain Yield Optimization Strategy")
print("=" * 45)
# Step 1: Analyze yield opportunities across chains
yield_opportunities = {
'ethereum': {
'aave_usdc': 4.2,
'compound_usdc': 3.8,
'maker_dsr': 3.3
},
'polygon': {
'aave_usdc': 6.8,
'quickswap_usdc_matic': 12.5,
'curve_3pool': 8.2
},
'arbitrum': {
'aave_usdc': 5.5,
'radiant_usdc': 9.2,
'gmx_glp': 15.8
},
'avalanche': {
'aave_usdc': 7.1,
'traderjoe_avax_usdc': 18.3,
'benqi_usdc': 6.2
},
'optimism': {
'aave_usdc': 5.8,
'velodrome_usdc_op': 14.7,
'lyra_staking': 12.1
}
}
# Step 2: Factor in bridge costs and time
bridge_costs = {
'ethereum': {'cost': 0, 'time': 0}, # Base chain
'polygon': {'cost': 0.1, 'time': 15}, # 0.1% cost, 15 min
'arbitrum': {'cost': 0.05, 'time': 20}, # 0.05% cost, 20 min
'avalanche': {'cost': 0.15, 'time': 25}, # 0.15% cost, 25 min
'optimism': {'cost': 0.05, 'time': 18} # 0.05% cost, 18 min
}
# Step 3: Calculate net APY after bridge costs
current_chain = 'ethereum'
current_balance = 50000 # $50k USDC on Ethereum
net_yields = {}
for chain, opportunities in yield_opportunities.items():
if chain == current_chain:
# No bridge cost for current chain
net_yields[chain] = {
protocol: apy for protocol, apy in opportunities.items()
}
else:
# Factor in bridge costs (annualized)
bridge_cost_annual = bridge_costs[chain]['cost'] * (365 / 30) # Assuming monthly rebalancing
net_yields[chain] = {
protocol: apy - bridge_cost_annual
for protocol, apy in opportunities.items()
}
# Step 4: Find optimal opportunities
best_opportunities = []
for chain, opportunities in net_yields.items():
for protocol, net_apy in opportunities.items():
best_opportunities.append({
'chain': chain,
'protocol': protocol,
'net_apy': net_apy,
'bridge_time': bridge_costs[chain]['time'],
'bridge_cost': bridge_costs[chain]['cost']
})
# Sort by net APY
best_opportunities.sort(key=lambda x: x['net_apy'], reverse=True)
print("Top 5 Cross-Chain Yield Opportunities:")
for i, opp in enumerate(best_opportunities[:5], 1):
print(f" {i}. {opp['protocol']} on {opp['chain']}")
print(f" Net APY: {opp['net_apy']:.1f}%")
print(f" Bridge Cost: {opp['bridge_cost']:.2f}%")
print(f" Bridge Time: {opp['bridge_time']} minutes")
print()
# Step 5: Execute optimal strategy
target_opportunity = best_opportunities[0]
if target_opportunity['net_apy'] > 8 and target_opportunity['chain'] != current_chain:
print(f"🎯 Executing cross-chain migration to {target_opportunity['chain']}")
# Bridge assets to target chain
bridge_result = execute_cross_chain_migration(
from_chain=current_chain,
to_chain=target_opportunity['chain'],
amount=current_balance,
target_protocol=target_opportunity['protocol']
)
if bridge_result['success']:
print(f"✅ Successfully migrated to {target_opportunity['chain']}")
print(f"Expected APY increase: {target_opportunity['net_apy'] - 4.2:.1f}%") # Assuming 4.2% on Ethereum
else:
print(f"❌ Migration failed: {bridge_result['error']}")
else:
print(f"Current position optimal, staying on {current_chain}")
def execute_cross_chain_migration(from_chain, to_chain, amount, target_protocol):
"""Execute cross-chain asset migration for yield optimization"""
print(f"🌉 Migrating ${amount:,.0f} USDC from {from_chain} to {to_chain}")
try:
# Step 1: Get optimal bridge route
quote = lifi.get_quote(
from_chain=from_chain,
to_chain=to_chain,
from_token='USDC',
to_token='USDC',
amount=amount
)
if not quote:
return {'success': False, 'error': 'No bridge route available'}
print(f"Bridge quote: ${quote['to_amount']:,.2f} USDC (${quote['fee_cost_usd']:.2f} fees)")
print(f"Estimated time: {quote['execution_duration']} seconds")
# Step 2: Execute bridge transfer
bridge_result = lifi.execute_transfer(quote)
if not bridge_result['success']:
return {'success': False, 'error': f"Bridge failed: {bridge_result['error']}"}
# Step 3: Deploy to target protocol on destination chain
destination_amount = quote['to_amount']
deployment_result = deploy_to_target_protocol(
to_chain,
target_protocol,
destination_amount
)
return {
'success': True,
'bridge_tx': bridge_result['final_transaction'],
'deployment_tx': deployment_result,
'final_amount': destination_amount
}
except Exception as e:
return {'success': False, 'error': str(e)}
def deploy_to_target_protocol(chain, protocol, amount):
"""Deploy assets to target yield protocol on destination chain"""
print(f"🎯 Deploying ${amount:,.2f} to {protocol} on {chain}")
# Protocol deployment mapping
protocol_deployments = {
'aave_usdc': lambda: deploy_to_aave(chain, 'USDC', amount),
'quickswap_usdc_matic': lambda: deploy_to_quickswap_lp(chain, amount),
'traderjoe_avax_usdc': lambda: deploy_to_traderjoe_lp(chain, amount),
'gmx_glp': lambda: deploy_to_gmx_glp(amount),
'velodrome_usdc_op': lambda: deploy_to_velodrome(chain, amount)
}
deployment_func = protocol_deployments.get(protocol)
if deployment_func:
return deployment_func()
else:
print(f"❌ Unknown protocol: {protocol}")
return None
def deploy_to_aave(chain, asset, amount):
"""Deploy to Aave lending on target chain"""
# This would integrate with the Aave exchange implementation
# from the DeFi lending platforms guide
print(f"Deploying to Aave {asset} lending on {chain}")
return f"0x{'a' * 64}" # Mock transaction hash
def deploy_to_quickswap_lp(chain, amount):
"""Deploy to QuickSwap LP on Polygon"""
# This would integrate with QuickSwap LP from Layer 2 DEX guide
print(f"Deploying to QuickSwap USDC-MATIC LP on {chain}")
return f"0x{'b' * 64}" # Mock transaction hash
def cross_chain_arbitrage_strategy():
"""
Execute arbitrage opportunities across different chains
"""
print("⚡ Cross-Chain Arbitrage Strategy")
print("=" * 30)
# Step 1: Monitor prices across chains
assets_to_monitor = ['ETH', 'USDC', 'USDT', 'WBTC']
chains_to_check = ['ethereum', 'polygon', 'arbitrum', 'avalanche', 'optimism']
arbitrage_opportunities = []
for asset in assets_to_monitor:
prices = {}
# Get prices on each chain (simplified - would use price feeds)
for chain in chains_to_check:
prices[chain] = get_asset_price(asset, chain)
# Find price differences
min_price_chain = min(prices, key=prices.get)
max_price_chain = max(prices, key=prices.get)
price_diff_percentage = (prices[max_price_chain] - prices[min_price_chain]) / prices[min_price_chain] * 100
if price_diff_percentage > 0.5: # Minimum 0.5% opportunity
# Factor in bridge costs
bridge_cost = get_bridge_cost(min_price_chain, max_price_chain, asset)
net_profit_percentage = price_diff_percentage - bridge_cost
if net_profit_percentage > 0.2: # Profitable after costs
arbitrage_opportunities.append({
'asset': asset,
'buy_chain': min_price_chain,
'sell_chain': max_price_chain,
'buy_price': prices[min_price_chain],
'sell_price': prices[max_price_chain],
'gross_profit_pct': price_diff_percentage,
'bridge_cost_pct': bridge_cost,
'net_profit_pct': net_profit_percentage,
'estimated_bridge_time': estimate_bridge_time(min_price_chain, max_price_chain)
})
if arbitrage_opportunities:
# Sort by net profit
arbitrage_opportunities.sort(key=lambda x: x['net_profit_pct'], reverse=True)
print("🎯 Cross-Chain Arbitrage Opportunities Found:")
for i, opp in enumerate(arbitrage_opportunities[:3], 1):
print(f" {i}. {opp['asset']}: Buy on {opp['buy_chain']} @ ${opp['buy_price']:.4f}")
print(f" Sell on {opp['sell_chain']} @ ${opp['sell_price']:.4f}")
print(f" Gross Profit: {opp['gross_profit_pct']:.2f}%")
print(f" Bridge Cost: {opp['bridge_cost_pct']:.2f}%")
print(f" Net Profit: {opp['net_profit_pct']:.2f}%")
print(f" Bridge Time: {opp['estimated_bridge_time']} minutes")
print()
# Execute best opportunity
best_opportunity = arbitrage_opportunities[0]
if best_opportunity['net_profit_pct'] > 1: # Only execute if >1% net profit
execute_cross_chain_arbitrage(best_opportunity)
else:
print("No profitable cross-chain arbitrage opportunities found")
def execute_cross_chain_arbitrage(opportunity):
"""Execute cross-chain arbitrage trade"""
asset = opportunity['asset']
buy_chain = opportunity['buy_chain']
sell_chain = opportunity['sell_chain']
# Determine trade size based on available capital and market depth
trade_size_usd = min(10000, get_available_capital(buy_chain)) # Max $10k or available capital
trade_size_tokens = trade_size_usd / opportunity['buy_price']
print(f"🚀 Executing {asset} arbitrage: ${trade_size_usd:,.0f} ({trade_size_tokens:.4f} {asset})")
print(f"Route: {buy_chain} → {sell_chain}")
try:
# Step 1: Buy asset on cheaper chain
buy_result = buy_asset_on_chain(buy_chain, asset, trade_size_usd)
if not buy_result['success']:
print(f"❌ Buy failed on {buy_chain}: {buy_result['error']}")
return
actual_tokens_bought = buy_result['tokens_received']
print(f"✅ Bought {actual_tokens_bought:.4f} {asset} on {buy_chain}")
# Step 2: Bridge to sell chain
bridge_quote = lifi.get_quote(
from_chain=buy_chain,
to_chain=sell_chain,
from_token=asset,
to_token=asset,
amount=actual_tokens_bought
)
if not bridge_quote:
print(f"❌ No bridge route available")
return
bridge_result = lifi.execute_transfer(bridge_quote)
if not bridge_result['success']:
print(f"❌ Bridge failed: {bridge_result['error']}")
return
tokens_after_bridge = bridge_quote['to_amount']
print(f"✅ Bridged {tokens_after_bridge:.4f} {asset} to {sell_chain}")
# Step 3: Sell on expensive chain
sell_result = sell_asset_on_chain(sell_chain, asset, tokens_after_bridge)
if not sell_result['success']:
print(f"❌ Sell failed on {sell_chain}: {sell_result['error']}")
return
final_usd_received = sell_result['usd_received']
print(f"✅ Sold for ${final_usd_received:,.2f} on {sell_chain}")
# Step 4: Calculate actual profit
total_profit = final_usd_received - trade_size_usd
profit_percentage = (total_profit / trade_size_usd) * 100
print(f"\n💰 Arbitrage Results:")
print(f" Initial Investment: ${trade_size_usd:,.2f}")
print(f" Final Amount: ${final_usd_received:,.2f}")
print(f" Profit: ${total_profit:,.2f} ({profit_percentage:.2f}%)")
if total_profit > 0:
print(f"✅ Arbitrage successful!")
else:
print(f"❌ Arbitrage resulted in loss")
return {
'success': True,
'profit_usd': total_profit,
'profit_percentage': profit_percentage,
'trades_executed': 3 # buy, bridge, sell
}
except Exception as e:
print(f"❌ Arbitrage execution failed: {e}")
return {'success': False, 'error': str(e)}
def monitor_cross_chain_opportunities():
"""Continuously monitor for cross-chain opportunities"""
print("🔍 Starting cross-chain opportunity monitoring...")
while True:
try:
# Run arbitrage detection
cross_chain_arbitrage_strategy()
# Run yield optimization check (less frequent)
if time.time() % 3600 < 300: # Every hour
cross_chain_yield_optimization()
# Wait before next check
time.sleep(300) # Check every 5 minutes
except Exception as e:
print(f"Error in monitoring: {e}")
time.sleep(600) # Wait 10 minutes on error
except KeyboardInterrupt:
print("Monitoring stopped by user")
break
# Helper functions (simplified implementations)
def get_asset_price(asset, chain):
"""Get current asset price on specific chain"""
# This would integrate with price oracles or DEX APIs
base_prices = {'ETH': 1800, 'USDC': 1.0, 'USDT': 0.999, 'WBTC': 28000}
# Add small random variations to simulate price differences
import random
price = base_prices.get(asset, 0)
variation = random.uniform(-0.02, 0.02) # ±2% variation
return price * (1 + variation)
def get_bridge_cost(from_chain, to_chain, asset):
"""Get estimated bridge cost as percentage"""
base_costs = {
('ethereum', 'polygon'): 0.1,
('ethereum', 'arbitrum'): 0.05,
('ethereum', 'avalanche'): 0.15,
('polygon', 'arbitrum'): 0.08,
('arbitrum', 'avalanche'): 0.12
}
return base_costs.get((from_chain, to_chain), 0.2) # Default 0.2%
def estimate_bridge_time(from_chain, to_chain):
"""Estimate bridge completion time in minutes"""
base_times = {
('ethereum', 'polygon'): 15,
('ethereum', 'arbitrum'): 20,
('ethereum', 'avalanche'): 25,
('polygon', 'arbitrum'): 18,
('arbitrum', 'avalanche'): 22
}
return base_times.get((from_chain, to_chain), 30) # Default 30 minutes
# Cross-Chain Infrastructure Configuration
HOP_PROTOCOL_ENABLED=true
HOP_ETHEREUM_RPC=https://mainnet.infura.io/v3/YOUR_INFURA_KEY
HOP_POLYGON_RPC=https://polygon-rpc.com
HOP_ARBITRUM_RPC=https://arb1.arbitrum.io/rpc
HOP_OPTIMISM_RPC=https://mainnet.optimism.io
LIFI_API_KEY=your_lifi_api_key
LIFI_ETHEREUM_RPC=https://mainnet.infura.io/v3/YOUR_INFURA_KEY
LIFI_POLYGON_RPC=https://polygon-rpc.com
LIFI_ARBITRUM_RPC=https://arb1.arbitrum.io/rpc
LIFI_AVALANCHE_RPC=https://api.avax.network/ext/bc/C/rpc
SYNAPSE_ENABLED=true
ACROSS_ENABLED=true
STARGATE_ENABLED=true
# Cross-Chain Strategy Parameters
CROSS_CHAIN_MIN_ARBITRAGE_PROFIT=0.5
CROSS_CHAIN_MAX_BRIDGE_TIME=30
CROSS_CHAIN_AUTO_REBALANCE=true
CROSS_CHAIN_YIELD_OPTIMIZATION_INTERVAL=86400
CROSS_CHAIN_MAX_SLIPPAGE=0.03
CROSS_CHAIN_GAS_OPTIMIZATION=true
# Bridge Preferences
PREFERRED_BRIDGES=hop,across,lifi,stargate
EMERGENCY_BRIDGE_FALLBACK=true
BRIDGE_MONITORING_ENABLED=true
This comprehensive cross-chain infrastructure documentation provides full integration capabilities for major bridge protocols with advanced cross-chain arbitrage and yield optimization strategies within PowerTraderAI+.