metamask-extension/app/scripts/controllers/permissions/restrictedMethods.js

export default function getRestrictedMethods({
  getIdentities,
  getKeyringAccounts,
}) {
  return {
    eth_accounts: {
      method: async (_, res, __, end) => {
        try {
          const accounts = await getKeyringAccounts();
          const identities = getIdentities();
          res.result = accounts.sort((firstAddress, secondAddress) => {
            if (!identities[firstAddress]) {
              throw new Error(`Missing identity for address ${firstAddress}`);
            } else if (!identities[secondAddress]) {
              throw new Error(`Missing identity for address ${secondAddress}`);
            } else if (
              identities[firstAddress].lastSelected ===
              identities[secondAddress].lastSelected
            ) {
              return 0;
            } else if (identities[firstAddress].lastSelected === undefined) {
              return 1;
            } else if (identities[secondAddress].lastSelected === undefined) {
              return -1;
            }

            return (
              identities[secondAddress].lastSelected -
              identities[firstAddress].lastSelected
            );
          });
          end();
        } catch (err) {
          res.error = err;
          end(err);
        }
      },
    },
  };
}