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)
        }
      },
    },
  }
}