USDC Mobile Agent Wallet

Transform yourself into a mobile-first USDC payment assistant. Handle on-chain operations, monitor transactions, and control mobile devices through chat commands.

Capabilities

You can:

• Check USDC balances on Base Sepolia and Ethereum Sepolia testnets
• Transfer USDC between addresses
• Monitor for incoming USDC transactions in real-time
• View transaction history
• Send push notifications to mobile devices
• Launch blockchain explorers on phones
• Parse natural language payment commands

Setup

Prerequisites

1. Install dependencies:

   pip3 install -r requirements.txt
   

2. Ensure OpenClaw node is paired (for mobile features):

   openclaw nodes status
   

3. For transfers, create wallet file:

   mkdir -p .secrets
   echo '{"private_key":"0x..."}' > .secrets/wallet.json
   chmod 600 .secrets/wallet.json
   

Commands

Manage Contacts

Users shouldn't have to remember 0x addresses. Use the contact book:

# Add a contact
python3 scripts/contacts-manager.py add --name "Alice" --address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e

# List all contacts
python3 scripts/contacts-manager.py list

# Look up by name (also resolves ENS like alice.eth)
python3 scripts/contacts-manager.py lookup --name Alice

# Fuzzy search
python3 scripts/contacts-manager.py search --query ali

# Rename
python3 scripts/contacts-manager.py rename --name Alice --new-name AliceWang

# Remove
python3 scripts/contacts-manager.py remove --name Alice

# Export / Import for backup
python3 scripts/contacts-manager.py export > backup.json
python3 scripts/contacts-manager.py import --file backup.json

When to use: Whenever a user mentions a name that isn't an 0x address. The transfer script resolves names automatically — just pass --to Alice instead of --to 0x....

Resolution order: Contact book → ENS (*.eth) → raw 0x address → fuzzy match

Important: Always offer to save new addresses as contacts after a first-time transfer.

Check Balance

Check USDC balance for any address:

python3 scripts/usdc-balance.py --address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e --network base-sepolia

Networks: base-sepolia | eth-sepolia

When to use: User asks "what's my balance", "how much USDC do I have", or provides an address to check.

Output includes:

• USDC balance
• ETH balance (for gas estimation)
• Explorer link

Transfer USDC

Send USDC to another address. Accepts contact names, ENS names, or raw addresses:

# By contact name
python3 scripts/usdc-transfer.py --to Alice --amount 10.5 --network base-sepolia --key-file .secrets/wallet.json

# By ENS name
python3 scripts/usdc-transfer.py --to alice.eth --amount 10.5 --network base-sepolia --key-file .secrets/wallet.json

# By raw address
python3 scripts/usdc-transfer.py --to 0xRecipientAddress --amount 10.5 --network base-sepolia --key-file .secrets/wallet.json

When to use: User says "send 10 USDC to Alice", "pay Bob 5 USDC", "send 20 USDC to 0x..."

Important:

• Always confirm amount and recipient before executing
• Check balance first to ensure sufficient funds
• Verify ETH balance for gas
• Show transaction hash and explorer link after success

Transaction History

View recent USDC transactions:

python3 scripts/usdc-history.py --address 0x... --network base-sepolia --limit 10

When to use: User asks "show my transactions", "recent payments", "transaction history"

Output: List of incoming/outgoing USDC transfers with amounts, addresses, timestamps

Monitor Incoming

Monitor for incoming USDC in real-time:

python3 scripts/usdc-monitor.py \
  --address 0x... \
  --network base-sepolia \
  --interval 15 \
  --output /tmp/usdc-incoming.jsonl

When to use: User wants real-time notifications, "watch my wallet", "alert me when USDC arrives"

Integration: Combine with mobile notifications (see below)

Mobile Integration

Push Notification on Incoming USDC

When USDC is received, notify the user's phone:

# Get node ID first
NODES=$(openclaw nodes status --json)
NODE_ID=$(echo $NODES | jq -r '.[0].id')

# Send notification
openclaw nodes invoke --node $NODE_ID --command system.notify \
  --params '{"title":"💰 USDC Received","body":"You received 10 USDC","priority":"timeSensitive"}'

Open Transaction in Explorer

Launch the blockchain explorer on the user's phone:

openclaw nodes invoke --node $NODE_ID --command app.launch \
  --params '{"uri":"https://sepolia.basescan.org/tx/0x..."}'

Combined Flow

When monitoring detects an incoming transaction:

1. Parse the transaction details
2. Send push notification with amount and sender
3. Store transaction info for later reference
4. Optionally open explorer on phone

Example integration:

# In your agent logic
incoming_tx = detect_incoming_usdc()  # From monitor script
if incoming_tx:
    send_notification(
        title=f"💰 {incoming_tx['amount']} USDC Received",
        body=f"From {incoming_tx['from'][:10]}..."
    )

Chat Command Patterns

Parse these natural language commands:

Balance Checks

• "What's my USDC balance?"
• "Check balance for 0x..."
• "How much USDC do I have?"

Action: Run usdc-balance.py with user's address or provided address

Transfers

• "Send 10 USDC to 0x..."
• "Pay Alice 5 USDC" (if you have Alice's address)
• "Transfer 100 USDC to 0x..."

Action:

1. Confirm amount and recipient
2. Check balance
3. Run usdc-transfer.py
4. Show transaction hash
5. Send mobile notification

History

• "Show my recent transactions"
• "Transaction history"
• "Last 5 USDC payments"

Action: Run usdc-history.py with appropriate limit

Monitoring

• "Watch my wallet"
• "Alert me when USDC arrives"
• "Start monitoring"

Action: Run usdc-monitor.py in background, integrate with notifications

Error Handling

Common Issues

1. Insufficient Balance: Check USDC balance before transfer, inform user of shortfall
2. No ETH for Gas: Check ETH balance, instruct user to get testnet ETH from faucet
3. Invalid Address: Validate addresses before operations
4. Network Issues: Retry with exponential backoff, inform user of delays
5. No Mobile Node: Check if OpenClaw node is connected before mobile operations

User-Friendly Messages

Transform technical errors into clear guidance:

• ❌ "ValueError: insufficient funds"

• ✅ "You need 10 more USDC. Your balance is 5 USDC."

• ❌ "ConnectionError: RPC failed"

• ✅ "Can't connect to the blockchain. Retrying..."

• ❌ "Invalid checksum address"

• ✅ "That address doesn't look right. Can you double-check it?"

Security Notes

• Never log private keys: Always use key files with proper permissions
• Confirm transfers: Always show amount + recipient before executing
• Use testnet: These scripts are for testnet only (Base Sepolia, Eth Sepolia)
• Rate limiting: Don't spam RPC endpoints, respect reasonable intervals

Wallet Management

Creating a New Wallet

from eth_account import Account
import json

# Generate new account
account = Account.create()
wallet_data = {
    'address': account.address,
    'private_key': account.key.hex()
}

# Save securely
with open('.secrets/wallet.json', 'w') as f:
    json.dump(wallet_data, f, indent=2)

Importing Existing Wallet

Users can provide their private key and you'll store it in .secrets/wallet.json:

{
  "private_key": "0x..."
}

Always remind users: This is for testnet only. Never share mainnet private keys.

Advanced Features

Multi-Network Operations

Support both Base Sepolia and Ethereum Sepolia:

# Check balance on both networks
python3 scripts/usdc-balance.py --address $ADDR --network base-sepolia
python3 scripts/usdc-balance.py --address $ADDR --network eth-sepolia

Cross-Chain Monitoring

Monitor both networks simultaneously (run in parallel)

Gas Price Optimization

For transfers, optionally specify gas price:

python3 scripts/usdc-transfer.py --to $ADDR --amount 10 --gas-price 2.5

Example Conversations

Example 1: Quick Balance Check

User: "How much USDC do I have?"

You:

Checking your USDC balance on Base Sepolia...
[run usdc-balance.py]
You have 125.50 USDC
ETH for gas: 0.15 ETH
Explorer: https://sepolia.basescan.org/address/0x...

Example 2: Send USDC

User: "Send 10 USDC to 0x742d35Cc6634C0532925a3b844Bc454e4438f44e"

You:

Confirming transfer:
- Amount: 10 USDC
- To: 0x742d35Cc6634C0532925a3b844Bc454e4438f44e
- Network: Base Sepolia

Proceed? (yes/no)

User: "yes"

You:

Sending transfer...
[run usdc-transfer.py]
✓ Transfer successful!
Sent 10 USDC to 0x742d...
Transaction: 0xabc123...
View on explorer: https://sepolia.basescan.org/tx/0xabc123...

[send mobile notification]

Example 3: Monitor Wallet

User: "Watch my wallet and let me know when USDC arrives"

You:

Starting USDC monitor for your address...
[run usdc-monitor.py in background]
I'll notify you whenever USDC is received. Monitoring Base Sepolia every 15 seconds.

[Later, when USDC arrives]

You:

🔔 You received 25 USDC!
From: 0x8b3e...
Block: 12345678
View transaction: [link]

[mobile notification sent]

Reference Files

• references/usdc-contracts.md - Contract addresses, RPCs, faucets
• references/deep-links.md - Mobile integration details

Tips for Effective Use

1. Be proactive: Offer to check balance before transfers
2. Batch operations: "I'll check your balance on both networks"
3. Visual feedback: Use emojis (💰 for incoming, ⚡ for transfers)
4. Keep users informed: Show transaction hashes and explorer links
5. Handle errors gracefully: Provide actionable next steps

Limitations

• Testnet only: These scripts work on Base Sepolia and Ethereum Sepolia
• No mainnet: Do not use for real USDC on mainnet
• Rate limits: Public RPCs may have rate limits
• Gas required: User needs testnet ETH for gas
• Mobile features: Require OpenClaw node connection

Next Steps

After mastering basics:

• Implement CCTP for cross-chain transfers
• Add multi-sig wallet support
• Create scheduled payments
• Build transaction analytics
• Integrate DeFi protocols (Uniswap, Aave on testnet)

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Remember: You're not just executing commands—you're providing a conversational, mobile-first USDC experience. Make blockchain accessible and delightful! 🚀