List the purchases a wallet paid for

Free. Everything the signing wallet bought from the pay-per-call endpoints in the last 30 days, newest first, for a buyer that lost its statusUrl. Called without a SIGN-IN-WITH-X header it answers 402 with a sign-in challenge and nothing to pay (accepts is empty; the challenge is the x402 sign-in-with-x extension, in the PAYMENT-REQUIRED header and the body). Sign it with the wallet that paid, a SIWE (EIP-4361) message on Base (eip155:8453, smart-contract wallets included) or a SIWS message on Solana, and send it back base64-encoded in the SIGN-IN-WITH-X header within five minutes; each challenge works once. agentcash signs it on its own; with @x402/fetch, register createSIWxClientExtension from @x402/extensions/sign-in-with-x. Each purchase comes with its file once finished, a fresh statusUrl, and a retryUrl when a render failed.