modbender ClawPay — Escrow Payments for AI Agents
You can send and receive trustless escrow payments on Solana using ClawPay. This skill handles the full payment lifecycle: locking funds, confirming delivery, releasing payments, and checking receipts.
Setup
First, check if clawpay is installed:
pip3 show clawpay
If not installed:
pip3 install clawpay
The user's Solana wallet keypair is required. Check for it at the path in the SOLANA_KEYPAIR_PATH environment variable, or look for common locations:
~/wallet.json~/.config/solana/id.json~/projects/clawpay/program-keypair.json
If no keypair is found, ask the user to provide one or generate one with solana-keygen new --outfile ~/wallet.json.
How ClawPay Works
ClawPay is a time-locked escrow protocol on Solana. Every payment follows this flow:
- T0 — Lock: Buyer locks SOL into an escrow account
- T1 — Deliver: Seller must deliver before the deadline, or funds auto-refund to buyer
- T2 — Verify: Buyer confirms delivery, or funds auto-release to seller after the window
- Settle: 98% goes to seller, 1% to ClawPay, 1% to referrer (if any)
- Receipt: Cryptographic receipt minted on-chain for both parties
No trust required between agents. The timeline enforces everything.
Core Operations
Pay Another Agent (Create Escrow)
When asked to pay an agent or buy a service:
from clawpay import Client
from solders.keypair import Keypair
from solders.pubkey import Pubkey
keypair = Keypair.from_json(open("KEYPAIR_PATH").read())
client = Client(keypair)
escrow = client.create_escrow(
seller=Pubkey.from_string("SELLER_PUBKEY"),
amount_sol=AMOUNT,
delivery_secs=DELIVERY_TIME, # seconds until delivery deadline
verification_secs=VERIFICATION_TIME # seconds for dispute window (min 10)
)
print(f"Escrow created: {escrow.address}")
print(f"Amount: {escrow.amount_sol} SOL")
print(f"Delivery deadline: {escrow.t1}")
print(f"Verification ends: {escrow.t2}")
Default values if not specified:
delivery_secs: 600 (10 minutes)verification_secs: 30 (30 seconds)amount_sol: Ask the user — never assume an amount
Confirm Delivery (As Seller)
When you've completed a service and need to confirm delivery:
from clawpay import Client
from solders.keypair import Keypair
from solders.pubkey import Pubkey
keypair = Keypair.from_json(open("KEYPAIR_PATH").read())
client = Client(keypair)
escrow_address = Pubkey.from_string("ESCROW_ADDRESS")
client.confirm_delivery(escrow_address, keypair)
print("Delivery confirmed. Waiting for verification window.")
Release Funds (After Verification)
After the verification window passes, anyone can trigger release:
client.auto_release(Pubkey.from_string("ESCROW_ADDRESS"))
print("Funds released to seller.")
Refund (Missed Delivery Deadline)
If the seller missed the delivery deadline:
client.auto_refund(Pubkey.from_string("ESCROW_ADDRESS"))
print("Funds refunded to buyer.")
Check Escrow Status
escrow = client.get_escrow(Pubkey.from_string("ESCROW_ADDRESS"))
print(f"Status: {escrow.status}")
print(f"Amount: {escrow.amount_sol} SOL")
print(f"Delivered: {escrow.delivered}")
print(f"Released: {escrow.released}")
Check Agent Reputation (Receipts)
receipts = client.get_receipts(Pubkey.from_string("AGENT_PUBKEY"))
print(f"Total transactions: {len(receipts)}")
for r in receipts:
outcome = ["released", "refunded", "disputed"][r.outcome]
print(f" #{r.receipt_index}: {r.amount_sol} SOL — {outcome}")
Important Constraints
- Minimum escrow: 0.05 SOL
- Maximum escrow: 10.0 SOL
- Minimum verification window: 10 seconds
- Maximum delivery time: 30 days
- Fee: 2% on settlement (1% ClawPay + 1% referrer)
- Network: Solana Mainnet (default) or Devnet
Guardrails
- NEVER create an escrow without confirming the amount with the user first
- NEVER send funds without verifying the seller's public key
- Always display the escrow address after creation — the user needs it
- Always check escrow status before attempting release or refund
- If a keypair file is not found, ask the user — do not guess
- Report all errors clearly, especially insufficient balance errors
- When checking reputation, mention both successful and failed transactions for honesty
Verification
After any transaction, you can verify on Solana Explorer:
- Program: https://explorer.solana.com/address/F2nwkN9i2kUDgjfLwHwz2zPBXDxLDFjzmmV4TXT6BWeD
- Transaction: https://explorer.solana.com/tx/TRANSACTION_SIGNATURE