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    // Copyright 2015-2017 Parity Technologies (UK) Ltd.
    // This file is part of Parity.

    // Parity 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.

    // Parity 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 Parity.  If not, see <http://www.gnu.org/licenses/>.

    use util::{Address, U256, Bytes};

    /// Transaction request coming from RPC
    #[derive(Debug, Clone, Default, Eq, PartialEq, Hash)]
    pub struct TransactionRequest {
    	/// Sender
    	pub from: Option<Address>,
    	/// Recipient
    	pub to: Option<Address>,
    	/// Gas Price
    	pub gas_price: Option<U256>,
    	/// Gas
    	pub gas: Option<U256>,
    	/// Value of transaction in wei
    	pub value: Option<U256>,
    	/// Additional data sent with transaction
    	pub data: Option<Bytes>,
    	/// Transaction's nonce
    	pub nonce: Option<U256>,
    	/// Delay until this block if specified.
    	pub min_block: Option<u64>,
    }

    /// Transaction request coming from RPC with default values filled in.
    #[derive(Debug, Clone, Default, Eq, PartialEq, Hash)]
    pub struct FilledTransactionRequest {
    	/// Sender
    	pub from: Address,
    	/// Indicates if the sender was filled by default value.
    	pub used_default_from: bool,
    	/// Recipient
    	pub to: Option<Address>,
    	/// Gas Price
    	pub gas_price: U256,
    	/// Gas
    	pub gas: U256,
    	/// Value of transaction in wei
    	pub value: U256,
    	/// Additional data sent with transaction
    	pub data: Bytes,
    	/// Transaction's nonce
    	pub nonce: Option<U256>,
    	/// Delay until this block if specified.
    	pub min_block: Option<u64>,
    }

    impl From<FilledTransactionRequest> for TransactionRequest {
    	fn from(r: FilledTransactionRequest) -> Self {
    		TransactionRequest {
    			from: Some(r.from),
    			to: r.to,
    			gas_price: Some(r.gas_price),
    			gas: Some(r.gas),
    			value: Some(r.value),
    			data: Some(r.data),
    			nonce: r.nonce,
    			min_block: r.min_block,
    		}
    	}
    }

    /// Call request
    #[derive(Debug, Default, PartialEq)]
    pub struct CallRequest {
    	/// From
    	pub from: Option<Address>,
    	/// To
    	pub to: Option<Address>,
    	/// Gas Price
    	pub gas_price: Option<U256>,
    	/// Gas
    	pub gas: Option<U256>,
    	/// Value
    	pub value: Option<U256>,
    	/// Data
    	pub data: Option<Vec<u8>>,
    	/// Nonce
    	pub nonce: Option<U256>,
    }

    /// Confirmation object
    #[derive(Debug, Clone, Eq, PartialEq, Hash)]
    pub struct ConfirmationRequest {
    	/// Id of this confirmation
    	pub id: U256,
    	/// Payload to confirm
    	pub payload: ConfirmationPayload,
    }

    /// Payload to confirm in Trusted Signer
    #[derive(Debug, Clone, Eq, PartialEq, Hash)]
    pub enum ConfirmationPayload {
    	/// Transaction
    	SendTransaction(FilledTransactionRequest),
    	/// Sign Transaction
    	SignTransaction(FilledTransactionRequest),
    	/// Sign request
    	Signature(Address, Bytes),
    	/// Decrypt request
    	Decrypt(Address, Bytes),
    }

    impl ConfirmationPayload {
    	pub fn sender(&self) -> Address {
    		match *self {
    			ConfirmationPayload::SendTransaction(ref request) => request.from,
    			ConfirmationPayload::SignTransaction(ref request) => request.from,
    			ConfirmationPayload::Signature(ref address, _) => *address,
    			ConfirmationPayload::Decrypt(ref address, _) => *address,
    		}
    	}
    }

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