openethereum/ethcore/vm/src/tests.rs

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// Copyright 2015-2018 Parity Technologies (UK) Ltd.
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// 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 std::sync::Arc;
use std::collections::{HashMap, HashSet};
use ethereum_types::{U256, H256, Address};
use bytes::Bytes;
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use {
CallType, Schedule, EnvInfo,
ReturnData, Ext, ContractCreateResult, MessageCallResult,
CreateContractAddress, Result, GasLeft,
};
use hash::keccak;
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use error::TrapKind;
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pub struct FakeLogEntry {
pub topics: Vec<H256>,
pub data: Bytes
}
#[derive(PartialEq, Eq, Hash, Debug)]
pub enum FakeCallType {
Call, Create
}
#[derive(PartialEq, Eq, Hash, Debug)]
pub struct FakeCall {
pub call_type: FakeCallType,
pub create_scheme: Option<CreateContractAddress>,
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pub gas: U256,
pub sender_address: Option<Address>,
pub receive_address: Option<Address>,
pub value: Option<U256>,
pub data: Bytes,
pub code_address: Option<Address>,
}
/// Fake externalities test structure.
///
/// Can't do recursive calls.
#[derive(Default)]
pub struct FakeExt {
pub store: HashMap<H256, H256>,
pub suicides: HashSet<Address>,
pub calls: HashSet<FakeCall>,
pub sstore_clears: i128,
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pub depth: usize,
pub blockhashes: HashMap<U256, H256>,
pub codes: HashMap<Address, Arc<Bytes>>,
pub logs: Vec<FakeLogEntry>,
pub info: EnvInfo,
pub schedule: Schedule,
pub balances: HashMap<Address, U256>,
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pub tracing: bool,
pub is_static: bool,
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}
// similar to the normal `finalize` function, but ignoring NeedsReturn.
pub fn test_finalize(res: Result<GasLeft>) -> Result<U256> {
match res {
Ok(GasLeft::Known(gas)) => Ok(gas),
Ok(GasLeft::NeedsReturn{..}) => unimplemented!(), // since ret is unimplemented.
Err(e) => Err(e),
}
}
impl FakeExt {
/// New fake externalities
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pub fn new() -> Self {
FakeExt::default()
}
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/// New fake externalities with byzantium schedule rules
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pub fn new_byzantium() -> Self {
let mut ext = FakeExt::default();
ext.schedule = Schedule::new_byzantium();
ext
}
/// New fake externalities with constantinople schedule rules
pub fn new_constantinople() -> Self {
let mut ext = FakeExt::default();
ext.schedule = Schedule::new_constantinople();
ext
}
/// Alter fake externalities to allow wasm
pub fn with_wasm(mut self) -> Self {
self.schedule.wasm = Some(Default::default());
self
}
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}
impl Ext for FakeExt {
fn initial_storage_at(&self, _key: &H256) -> Result<H256> {
Ok(H256::new())
}
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fn storage_at(&self, key: &H256) -> Result<H256> {
Ok(self.store.get(key).unwrap_or(&H256::new()).clone())
}
fn set_storage(&mut self, key: H256, value: H256) -> Result<()> {
self.store.insert(key, value);
Ok(())
}
fn exists(&self, address: &Address) -> Result<bool> {
Ok(self.balances.contains_key(address))
}
fn exists_and_not_null(&self, address: &Address) -> Result<bool> {
Ok(self.balances.get(address).map_or(false, |b| !b.is_zero()))
}
fn origin_balance(&self) -> Result<U256> {
unimplemented!()
}
fn balance(&self, address: &Address) -> Result<U256> {
Ok(self.balances[address])
}
fn blockhash(&mut self, number: &U256) -> H256 {
self.blockhashes.get(number).unwrap_or(&H256::new()).clone()
}
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fn create(
&mut self,
gas: &U256,
value: &U256,
code: &[u8],
address: CreateContractAddress,
_trap: bool,
) -> ::std::result::Result<ContractCreateResult, TrapKind> {
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self.calls.insert(FakeCall {
call_type: FakeCallType::Create,
create_scheme: Some(address),
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gas: *gas,
sender_address: None,
receive_address: None,
value: Some(*value),
data: code.to_vec(),
code_address: None
});
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// TODO: support traps in testing.
Ok(ContractCreateResult::Failed)
}
fn call(
&mut self,
gas: &U256,
sender_address: &Address,
receive_address: &Address,
value: Option<U256>,
data: &[u8],
code_address: &Address,
_call_type: CallType,
_trap: bool,
) -> ::std::result::Result<MessageCallResult, TrapKind> {
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self.calls.insert(FakeCall {
call_type: FakeCallType::Call,
create_scheme: None,
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gas: *gas,
sender_address: Some(sender_address.clone()),
receive_address: Some(receive_address.clone()),
value: value,
data: data.to_vec(),
code_address: Some(code_address.clone())
});
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// TODO: support traps in testing.
Ok(MessageCallResult::Success(*gas, ReturnData::empty()))
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}
fn extcode(&self, address: &Address) -> Result<Option<Arc<Bytes>>> {
Ok(self.codes.get(address).cloned())
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}
fn extcodesize(&self, address: &Address) -> Result<Option<usize>> {
Ok(self.codes.get(address).map(|c| c.len()))
}
fn extcodehash(&self, address: &Address) -> Result<Option<H256>> {
Ok(self.codes.get(address).map(|c| keccak(c.as_ref())))
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}
fn log(&mut self, topics: Vec<H256>, data: &[u8]) -> Result<()> {
self.logs.push(FakeLogEntry {
topics: topics,
data: data.to_vec()
});
Ok(())
}
fn ret(self, _gas: &U256, _data: &ReturnData, _apply_state: bool) -> Result<U256> {
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unimplemented!();
}
fn suicide(&mut self, refund_address: &Address) -> Result<()> {
self.suicides.insert(refund_address.clone());
Ok(())
}
fn schedule(&self) -> &Schedule {
&self.schedule
}
fn env_info(&self) -> &EnvInfo {
&self.info
}
fn depth(&self) -> usize {
self.depth
}
fn is_static(&self) -> bool {
self.is_static
}
fn add_sstore_refund(&mut self, value: usize) {
self.sstore_clears += value as i128;
}
fn sub_sstore_refund(&mut self, value: usize) {
self.sstore_clears -= value as i128;
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}
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fn trace_next_instruction(&mut self, _pc: usize, _instruction: u8, _gas: U256) -> bool {
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self.tracing
}
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}