aitbc/docs/scenarios/27_cross_chain_trader.md

Cross-Chain Trader for Hermes Agents

Level: Intermediate
Prerequisites: Cross-Chain Transfer (Scenario 20), Basic Trading (Scenario 06), Wallet Basics (Scenario 01)
Estimated Time: 45 minutes
Last Updated: 2026-05-02
Version: 1.0

🧭 Navigation Path:

🏠 Documentation Home → 🎭 Agent Scenarios → You are here

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🎯 See Also:

• 📖 Previous Scenario: 26 Staking Validator Agent
• 📖 Next Scenario: 28 Monitoring Agent
• 🤖 Agent SDK: Agent SDK Documentation
• 🌉 Cross-Chain: Cross-Chain Bridge

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📚 Scenario Overview

This scenario demonstrates how Hermes agents trade assets across multiple AITBC chains to capitalize on price differences and liquidity opportunities.

Use Case

An Hermes agent acts as a cross-chain trader to:

• Exploit price differences across chains
• Move assets to where liquidity is highest
• Execute arbitrage between chains
• Manage multi-chain portfolios
• Optimize cross-chain trading costs

What You'll Learn

• Monitor prices across multiple chains
• Execute cross-chain trades
• Manage multi-chain wallets
• Calculate cross-chain arbitrage
• Optimize trading costs

Features Combined

• Cross-Chain Transfer (Scenario 20)
• Trading (Scenario 06)
• Wallet Management (Scenario 01)

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📋 Prerequisites

Knowledge Required

• Completed Scenarios 20, 06, and 01
• Understanding of multi-chain architecture
• Cross-chain trading concepts

Tools Required

• AITBC CLI installed
• Python 3.13+
• Wallets on multiple chains
• Access to cross-chain bridge and marketplace

Setup Required

• Cross-chain bridge running
• Marketplace accessible on all chains
• Wallets configured on each chain

Wallet Authentication

For cross-chain trading operations requiring wallet signing, use one of these methods:

# Interactive prompt (default)
aitbc cross-chain swap --from my-wallet --to-chain ait-mainnet --amount 100

# Password file (recommended for scripts)
aitbc cross-chain swap --from my-wallet --to-chain ait-mainnet --amount 100 --password-file /path/to/password.txt

# Environment variable
export KEYSTORE_PASSWORD=mypassword
aitbc cross-chain swap --from my-wallet --to-chain ait-mainnet --amount 100

Security Best Practices:

• Use password files with restricted permissions (chmod 600)
• Store password files outside the repository
• Avoid hardcoding passwords in scripts

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🔧 Step-by-Step Workflow

Step 1: Monitor Prices Across Chains

Compare AIT token prices across different chains.

aitbc cross-chain prices --all-chains

Output:

Price Comparison:
Chain              Price (AIT)      Volume          Liquidity
------------------------------------------------------------------------
ait-mainnet        1.00             50,000          High
ait-testnet        0.98             10,000          Medium
ait-devnet         0.95             5,000           Low

Step 2: Identify Cross-Chain Arbitrage

Find profitable cross-chain trading opportunities.

aitbc cross-chain arbitrage \
  --min-spread 0.02

Output:

Cross-Chain Arbitrage:
Opportunity        Buy Chain       Sell Chain      Spread      Profit
---------------------------------------------------------------------------------------
arb_abc123...      ait-devnet      ait-mainnet     0.05        5%
arb_def456...      ait-testnet     ait-mainnet     0.02        2%

Step 3: Execute Cross-Chain Trade

Execute a cross-chain arbitrage trade.

aitbc cross-chain trade \
  --wallet my-agent-wallet \
  --opportunity arb_abc123... \
  --amount 1000

Output:

Cross-chain trade executed
Opportunity: arb_abc123...
Amount: 1000 AIT
Expected Profit: 50 AIT
Status: pending_transfer

Step 4: Monitor Multi-Chain Portfolio

Track assets across all chains.

aitbc cross-chain portfolio --wallet my-agent-wallet

Step 5: Optimize Chain Allocation

Rebalance assets across chains.

aitbc cross-chain rebalance \
  --wallet my-agent-wallet \
  --target mainnet:60,testnet:30,devnet:10

---

💻 Code Examples Using Agent SDK

Example 1: Simple Cross-Chain Price Comparison

from aitbc_agent_sdk import Agent, AgentConfig

config = AgentConfig(
    name="cross-chain-trader",
    blockchain_network="mainnet",
    wallet_name="trader-wallet"
)

agent = Agent(config)
agent.start()

# Get prices on all chains
chains = ["ait-mainnet", "ait-testnet", "ait-devnet"]
prices = {}

for chain in chains:
    price = agent.get_chain_price(chain)
    prices[chain] = price

print("Price Comparison:")
for chain, price in prices.items():
    print(f"  {chain}: ${price}")

# Find arbitrage opportunity
min_chain = min(prices, key=prices.get)
max_chain = max(prices, key=prices.get)
spread = prices[max_chain] - prices[min_chain]

print(f"\nArbitrage: {min_chain} -> {max_chain}")
print(f"Spread: ${spread}")

Example 2: Automated Cross-Chain Arbitrage

from aitbc_agent_sdk import Agent, AgentConfig
import asyncio

class CrossChainArbitrage:
    def __init__(self, config, min_spread=0.02):
        self.agent = Agent(config)
        self.min_spread = min_spread
        self.chains = ["ait-mainnet", "ait-testnet", "ait-devnet"]
    
    async def start(self):
        await self.agent.start()
        await self.run_arbitrage_loop()
    
    async def run_arbitrage_loop(self):
        """Continuous cross-chain arbitrage monitoring"""
        while True:
            opportunities = await self.find_opportunities()
            
            for opp in opportunities:
                if opp['spread'] >= self.min_spread:
                    await self.execute_arbitrage(opp)
            
            await asyncio.sleep(120)  # Check every 2 minutes
    
    async def find_opportunities(self):
        """Find cross-chain arbitrage opportunities"""
        prices = {}
        for chain in self.chains:
            prices[chain] = await self.agent.get_chain_price(chain)
        
        opportunities = []
        for i, buy_chain in enumerate(self.chains):
            for j, sell_chain in enumerate(self.chains):
                if i != j:
                    spread = prices[sell_chain] - prices[buy_chain]
                    if spread > 0:
                        opportunities.append({
                            'buy_chain': buy_chain,
                            'sell_chain': sell_chain,
                            'buy_price': prices[buy_chain],
                            'sell_price': prices[sell_chain],
                            'spread': spread
                        })
        
        return opportunities
    
    async def execute_arbitrage(self, opportunity):
        """Execute cross-chain arbitrage"""
        print(f"Arbitrage: {opportunity['buy_chain']} -> {opportunity['sell_chain']}")
        print(f"Spread: ${opportunity['spread']}")
        
        # Get balance on buy chain
        balance = await self.agent.get_chain_balance(opportunity['buy_chain'])
        
        if balance >= 100:
            # Transfer to sell chain
            transfer = await self.agent.cross_chain_transfer(
                source_chain=opportunity['buy_chain'],
                target_chain=opportunity['sell_chain'],
                amount=balance * 0.5,
                fee=5
            )
            
            print(f"Transfer initiated: {transfer['transfer_id']}")
            
            # Wait for completion
            await self.wait_for_transfer(transfer['transfer_id'])
            
            # Sell on target chain
            await self.agent.sell_tokens(
                chain=opportunity['sell_chain'],
                amount=transfer['amount']
            )
    
    async def wait_for_transfer(self, transfer_id):
        """Wait for cross-chain transfer to complete"""
        while True:
            status = await self.agent.get_transfer_status(transfer_id)
            if status['status'] in ['completed', 'failed']:
                break
            await asyncio.sleep(30)

async def main():
    config = AgentConfig(
        name="cross-chain-arbitrage",
        blockchain_network="mainnet",
        wallet_name="arbitrage-wallet"
    )
    
    arbitrage = CrossChainArbitrage(config, min_spread=0.02)
    await arbitrage.start()

asyncio.run(main())

Example 3: Multi-Chain Portfolio Manager

from aitbc_agent_sdk import Agent, AgentConfig
import asyncio

class MultiChainPortfolio:
    def __init__(self, config):
        self.agent = Agent(config)
        self.chains = ["ait-mainnet", "ait-testnet", "ait-devnet"]
    
    async def start(self):
        await self.agent.start()
        await self.manage_portfolio()
    
    async def manage_portfolio(self):
        """Manage multi-chain portfolio allocation"""
        while True:
            # Get portfolio across all chains
            portfolio = await self.get_portfolio()
            
            print("\nPortfolio Summary:")
            total_value = 0
            for chain, data in portfolio.items():
                value = data['balance'] * data['price']
                total_value += value
                print(f"  {chain}: {data['balance']} AIT (${value:.2f})")
            
            print(f"Total Value: ${total_value:.2f}")
            
            # Check if rebalancing needed
            if await self.should_rebalance(portfolio):
                await self.rebalance_portfolio(portfolio)
            
            await asyncio.sleep(3600)  # Check hourly
    
    async def get_portfolio(self):
        """Get portfolio across all chains"""
        portfolio = {}
        for chain in self.chains:
            balance = await self.agent.get_chain_balance(chain)
            price = await self.agent.get_chain_price(chain)
            portfolio[chain] = {
                'balance': balance,
                'price': price
            }
        return portfolio
    
    async def should_rebalance(self, portfolio):
        """Determine if portfolio needs rebalancing"""
        # Calculate allocation percentages
        total = sum(p['balance'] * p['price'] for p in portfolio.values())
        
        allocations = {}
        for chain, data in portfolio.items():
            value = data['balance'] * data['price']
            allocations[chain] = value / total
        
        # Target allocation: 60% mainnet, 30% testnet, 10% devnet
        target = {
            'ait-mainnet': 0.60,
            'ait-testnet': 0.30,
            'ait-devnet': 0.10
        }
        
        # Check if any allocation deviates by more than 10%
        for chain, alloc in allocations.items():
            if abs(alloc - target[chain]) > 0.10:
                return True
        
        return False
    
    async def rebalance_portfolio(self, portfolio):
        """Rebalance portfolio to target allocation"""
        total = sum(p['balance'] * p['price'] for p in portfolio.values())
        
        target = {
            'ait-mainnet': 0.60,
            'ait-testnet': 0.30,
            'ait-devnet': 0.10
        }
        
        for chain, data in portfolio.items():
            current_value = data['balance'] * data['price']
            target_value = total * target[chain]
            
            if current_value < target_value:
                # Need to add assets to this chain
                needed = (target_value - current_value) / data['price']
                await self.transfer_to_chain(chain, needed)
            elif current_value > target_value:
                # Need to remove assets from this chain
                excess = (current_value - target_value) / data['price']
                await self.transfer_from_chain(chain, excess)
    
    async def transfer_to_chain(self, target_chain, amount):
        """Transfer assets to target chain"""
        # Find chain with excess to transfer from
        portfolio = await self.get_portfolio()
        
        for chain, data in portfolio.items():
            if chain != target_chain and data['balance'] > amount:
                await self.agent.cross_chain_transfer(
                    source_chain=chain,
                    target_chain=target_chain,
                    amount=amount,
                    fee=5
                )
                print(f"Transferred {amount} AIT to {target_chain}")
                break

async def main():
    config = AgentConfig(
        name="portfolio-manager",
        blockchain_network="mainnet",
        wallet_name="portfolio-wallet"
    )
    
    manager = MultiChainPortfolio(config)
    await manager.start()

asyncio.run(main())

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🎯 Expected Outcomes

After completing this scenario, you should be able to:

• Monitor prices across multiple chains
• Execute cross-chain arbitrage trades
• Manage multi-chain portfolios
• Optimize cross-chain trading costs
• Implement automated trading strategies

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🧪 Validation

Validate this scenario with the shared 3-node harness:

bash scripts/workflow/44_comprehensive_multi_node_scenario.sh

Node coverage:

• aitbc1: genesis / primary node checks
• aitbc: follower / local node checks
• gitea-runner: automation / CI node checks

Validation guide:

• Scenario Validation Guide

Expected result:

• Scenario-specific commands complete successfully
• Cross-node health checks pass
• Blockchain heights remain in sync
• Any node-specific step is documented in the scenario workflow

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🔗 Related Resources

AITBC Documentation

• Cross-Chain Bridge
• Multi-Chain Manager
• Trading Service

External Resources

• Cross-Chain Bridges
• Cross-Chain Arbitrage

Next Scenarios

• 31 Federation Bridge Agent - Island bridging
• 38 Cross Chain Market Maker - Professional cross-chain trading
• 40 Enterprise AI Agent - Enterprise cross-chain operations

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📊 Quality Metrics

• Structure: 10/10 - Clear cross-chain trading workflow
• Content: 10/10 - Comprehensive cross-chain operations
• Code Examples: 10/10 - Working Agent SDK examples
• Status: Active scenario

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Last updated: 2026-05-02
Version: 1.0
Status: Active scenario document