// 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/>.

//! ParitySigning rpc interface.
use jsonrpc_core::{BoxFuture, Result};
use jsonrpc_derive::rpc;

use ethereum_types::{H160, U256};
use v1::types::{Bytes, ConfirmationResponse, Either, TransactionRequest};

/// Signing methods implementation.
#[rpc(server)]
pub trait ParitySigning {
    /// RPC Metadata
    type Metadata;

    /// Given partial transaction request produces transaction with all fields filled in.
    /// Such transaction can be then signed externally.
    #[rpc(meta, name = "parity_composeTransaction")]
    fn compose_transaction(
        &self,
        _: Self::Metadata,
        _: TransactionRequest,
    ) -> BoxFuture<TransactionRequest>;

    /// Posts sign request asynchronously.
    /// Will return a confirmation ID for later use with check_transaction.
    #[rpc(meta, name = "parity_postSign")]
    fn post_sign(
        &self,
        _: Self::Metadata,
        _: H160,
        _: Bytes,
    ) -> BoxFuture<Either<U256, ConfirmationResponse>>;

    /// Posts transaction asynchronously.
    /// Will return a transaction ID for later use with check_transaction.
    #[rpc(meta, name = "parity_postTransaction")]
    fn post_transaction(
        &self,
        _: Self::Metadata,
        _: TransactionRequest,
    ) -> BoxFuture<Either<U256, ConfirmationResponse>>;

    /// Checks the progress of a previously posted request (transaction/sign).
    /// Should be given a valid send_transaction ID.
    #[rpc(name = "parity_checkRequest")]
    fn check_request(&self, _: U256) -> Result<Option<ConfirmationResponse>>;

    /// Decrypt some ECIES-encrypted message.
    /// First parameter is the address with which it is encrypted, second is the ciphertext.
    #[rpc(meta, name = "parity_decryptMessage")]
    fn decrypt_message(&self, _: Self::Metadata, _: H160, _: Bytes) -> BoxFuture<Bytes>;
}
