openethereum/ethcore/src/evm/wasm/call_args.rs

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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/>.
//! Wasm evm call arguments helper
use util::{U256, H160};
/// Input part of the wasm call descriptor
pub struct CallArgs {
/// Receiver of the transaction
pub address: [u8; 20],
/// Sender of the transaction
pub sender: [u8; 20],
/// Original transaction initiator
pub origin: [u8; 20],
/// Transfer value
pub value: [u8; 32],
/// call/create params
pub data: Vec<u8>,
}
impl CallArgs {
/// New contract call payload with known parameters
pub fn new(address: H160, sender: H160, origin: H160, value: U256, data: Vec<u8>) -> Self {
let mut descriptor = CallArgs {
address: [0u8; 20],
sender: [0u8; 20],
origin: [0u8; 20],
value: [0u8; 32],
data: data,
};
descriptor.address.copy_from_slice(&*address);
descriptor.sender.copy_from_slice(&*sender);
descriptor.origin.copy_from_slice(&*origin);
value.to_big_endian(&mut descriptor.value);
descriptor
}
/// Total call payload length in linear memory
pub fn len(&self) -> u32 {
self.data.len() as u32 + 92
}
}