Smart-account buyers

import { deploySmartAccount, addTokenRule, payFromSmartAccount } from "./smart-account";

// One-time setup: deploy an OpenZeppelin account and scope a session key to a token, under a budget.
const account = await deploySmartAccount(funder); // funder is a funded G... keypair; it pays the deploy only
const tokenRuleId = await addTokenRule({ funder, account, token, spendingLimit: 50_000_000n });

// Pay a seller from the C... account. token, payTo and amount come from the seller's 402 challenge.
const result = await payFromSmartAccount({
  facilitatorUrl: "https://facilitator.rail402.dev",
  simSource: funder, // only used to simulate and build; the facilitator re-sources and pays the fee
  account,
  tokenRuleId,
  token,   // accepts.asset
  payTo,   // accepts.payTo
  amount: "5000000", // atomic units
});

if (result.ok) console.log(result.transaction); // settled from the C... address