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

export default function getRestrictedMethods (permissionsController) {
  return {

    'eth_accounts': {
      description: `View the addresses of the user's chosen accounts.`,
      method: (_, res, __, end) => {
        permissionsController.getKeyringAccounts()
          .then((accounts) => {
            res.result = accounts
            end()
          })
          .catch(
            (err) => {
              res.error = err
              end(err)
            }
          )
      },
    },
  }
}