openethereum/evmbin/src/main.rs

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// Copyright 2015, 2016 Ethcore (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/>.
//! Parity EVM interpreter binary.
#![warn(missing_docs)]
#![allow(dead_code)]
extern crate ethcore;
extern crate rustc_serialize;
extern crate docopt;
#[macro_use]
extern crate ethcore_util as util;
mod ext;
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use std::sync::Arc;
use std::time::{Instant, Duration};
use std::str::FromStr;
use docopt::Docopt;
use util::{U256, FromHex, Uint, Bytes};
use ethcore::evm::{Factory, VMType, Finalize};
use ethcore::action_params::ActionParams;
const USAGE: &'static str = r#"
EVM implementation for Parity.
Copyright 2016 Ethcore (UK) Limited
Usage:
evmbin stats [options]
evmbin [-h | --help]
Transaction options:
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--code CODE Contract code as hex (without 0x)
--input DATA Input data as hex (without 0x)
--gas GAS Supplied gas as hex (without 0x)
General options:
-h, --help Display this message and exit.
"#;
fn main() {
let args: Args = Docopt::new(USAGE).and_then(|d| d.decode()).unwrap_or_else(|e| e.exit());
let mut params = ActionParams::default();
params.gas = args.gas();
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params.code = Some(Arc::new(args.code()));
params.data = args.data();
let result = run_vm(params);
println!("Gas used: {:?}", result.gas_used);
println!("Output: {:?}", result.output);
println!("Time: {}.{:.9}s", result.time.as_secs(), result.time.subsec_nanos());
}
/// Execute VM with given `ActionParams`
pub fn run_vm(params: ActionParams) -> ExecutionResults {
let initial_gas = params.gas;
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let factory = Factory::new(VMType::Interpreter, 1024);
let mut vm = factory.create(params.gas);
let mut ext = ext::FakeExt::default();
let start = Instant::now();
let gas_left = vm.exec(params, &mut ext).finalize(ext).expect("OK");
let duration = start.elapsed();
ExecutionResults {
gas_used: initial_gas - gas_left,
output: Vec::new(),
time: duration,
}
}
/// VM execution results
pub struct ExecutionResults {
/// Used gas
pub gas_used: U256,
/// Output as bytes
pub output: Vec<u8>,
/// Time Taken
pub time: Duration,
}
#[derive(Debug, RustcDecodable)]
struct Args {
cmd_stats: bool,
flag_code: Option<String>,
flag_gas: Option<String>,
flag_input: Option<String>,
}
impl Args {
pub fn gas(&self) -> U256 {
self.flag_gas
.clone()
.and_then(|g| U256::from_str(&g).ok())
.unwrap_or_else(|| !U256::zero())
}
pub fn code(&self) -> Bytes {
self.flag_code
.clone()
.and_then(|c| c.from_hex().ok())
.unwrap_or_else(|| die("Code is required."))
}
pub fn data(&self) -> Option<Bytes> {
self.flag_input
.clone()
.and_then(|d| d.from_hex().ok())
}
}
fn die(msg: &'static str) -> ! {
println!("{}", msg);
::std::process::exit(-1)
}