Payment links and invoices take a chain argument, Base or Arc testnet, and
pay_link settles on whichever chain the link was created on. Adds Arc to the
chain registry as a pay-only entry, so the x402 client and the pay tools share
one provider. my_wallet now names the gas asset per chain, since Arc bills gas
in USDC rather than ETH.
Subscriptions stay on Base. The contract is deployed on Arc but no indexer or
keeper runs there, so a subscription would never charge; the tools reject that
chain instead of writing the offer to Base.
Adds the merchant surface on Base: create payment links and itemized
invoices, publish subscription offers, read the dashboard, manage API keys
and signed webhooks. Adds the payer side too, so an agent can settle a link
or invoice in USDC on-chain and manage its own subscriptions.
Funds settle to the QIAN_KEY wallet, which signs a short-lived session. The
subscribe approval covers three periods rather than an unlimited amount.
Comments trimmed to one-liners before publish.
Qian