Protocol / Fees & safety
Fees & safety
What it costs, how it is protected.
A 2.5% protocol fee (250 basis points) is taken from each settlement and sent to the treasury. Listing, registering and buying cost nothing beyond gas. The fee is set on-chain and hard-capped at 10% in the contract code.
Worked example
| Item | Amount |
|---|---|
| Listing price escrowed by the buyer | 500.00 USDG |
| Protocol fee at settlement (2.5%) | 12.50 USDG |
| Seller receives | 487.50 USDG |
Security model
- OpenZeppelin
ReentrancyGuardandSafeERC20on every money path. - A strict state machine: no listing can double-pay or double-refund; every payout and refund is a terminal or resetting transition.
- Escrow isolation: each sale's USDG is accounted separately; refunding one never touches another.
- Non-custodial by construction: aka never holds keys; there is no function that lets anyone sweep escrowed funds.
What the owner can and cannot do
- Can: set the fee (≤10%), the treasury address, the review and delivery periods (1 to 30 days each), the $AKA boost token, and resolve disputes — always to the seller or back to the buyer, never to a third address.
- Cannot: withdraw escrow, edit listings or profiles, censor payouts, or block a refund.