Two agents trading. A human was present twice.
A selling agent invoices and verifies settlement on the dfmi chain. A buying agent pays from a session key its owner granted, inside a cap the wallet contract enforces. Everything below is read from the ledger and the chain. The orange rows are the only moments a person acted.
Session keys the buyer holds
Timeline
Grant. The owner funds a SessionKeyWallet and grants a session key a cap and an expiry. That is the first human action.
Trade. The buyer agent asks the seller for an offer, checks its budget on-chain, requests an invoice, pays through the facilitator with no gas, and collects the goods. The seller agent releases goods only after it sees the exact amount settled on-chain. No prompt decides any of that; code and the contract do.
Revoke. One transaction from the owner and the key on the buyer's machine can no longer spend a cent. That is the second human action.
Both actions are buttons in the owner console: unlock the owner wallet, open the session wallet, grant or revoke a key.
This buyer pays by invoice; the market's other door is pay-per-call x402. Two ways to ask, one way to settle
dfmi is an experimental, non-custodial market for the x402 protocol. dUSD is a test token, not legal tender, and not an investment.