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// Copyright 2015-2020 Parity Technologies (UK) Ltd.
// This file is part of OpenEthereum.

// OpenEthereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// OpenEthereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.

//! Local Accounts checker

use std::collections::HashSet;

use ethereum_types::Address;

/// Local accounts checker
pub trait LocalAccounts: Send + Sync {
    /// Returns true if given address should be considered local account.
    fn is_local(&self, &Address) -> bool;
}

impl LocalAccounts for HashSet<Address> {
    fn is_local(&self, address: &Address) -> bool {
        self.contains(address)
    }
}

impl<A, B> LocalAccounts for (A, B)
where
    A: LocalAccounts,
    B: LocalAccounts,
{
    fn is_local(&self, address: &Address) -> bool {
        self.0.is_local(address) || self.1.is_local(address)
    }
}