At this level
com.publicdomainrelay.temp.market.receipts ยท 2- com.publicdomainrelay.temp.market.receipts.free record Proof-of-grant receipt minted by the bidder in response to a GET against the bids.free url. No payment is involved; the receipt is the bidder's verifiable record that it agreed to provide the resource for free. Returned (by AT-URI + CID) to the requester, which uses it as the payload of the higher-level com.publicdomainrelay.temp.market.accept so the bidder can verify the grant before provisioning. The free counterpart of com.publicdomainrelay.temp.market.receipts.x402.
- com.publicdomainrelay.temp.market.receipts.x402 record Proof-of-payment receipt minted by the bidder in response to a successful x402-gated GET against the bids.x402 url. Returned (by AT-URI + CID) to the requester, which uses it as the payload of the higher-level com.publicdomainrelay.temp.market.accept so the bidder can verify payment before provisioning.