280 lines
7.4 KiB
Rust
280 lines
7.4 KiB
Rust
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
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// This file is part of Parity Ethereum.
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// Parity Ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity Ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity Ethereum. If not, see <http://www.gnu.org/licenses/>.
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use std::{
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collections::{HashMap, HashSet},
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sync::Arc,
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};
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use bytes::Bytes;
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use error::TrapKind;
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use ethereum_types::{Address, H256, U256};
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use hash::keccak;
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use CallType;
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use ContractCreateResult;
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use CreateContractAddress;
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use EnvInfo;
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use Ext;
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use GasLeft;
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use MessageCallResult;
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use Result;
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use ReturnData;
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use Schedule;
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pub struct FakeLogEntry {
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pub topics: Vec<H256>,
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pub data: Bytes,
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}
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#[derive(PartialEq, Eq, Hash, Debug)]
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pub enum FakeCallType {
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Call,
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Create,
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}
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#[derive(PartialEq, Eq, Hash, Debug)]
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pub struct FakeCall {
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pub call_type: FakeCallType,
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pub create_scheme: Option<CreateContractAddress>,
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pub gas: U256,
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pub sender_address: Option<Address>,
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pub receive_address: Option<Address>,
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pub value: Option<U256>,
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pub data: Bytes,
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pub code_address: Option<Address>,
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}
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/// Fake externalities test structure.
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///
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/// Can't do recursive calls.
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#[derive(Default)]
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pub struct FakeExt {
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pub store: HashMap<H256, H256>,
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pub suicides: HashSet<Address>,
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pub calls: HashSet<FakeCall>,
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pub sstore_clears: i128,
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pub depth: usize,
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pub blockhashes: HashMap<U256, H256>,
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pub codes: HashMap<Address, Arc<Bytes>>,
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pub logs: Vec<FakeLogEntry>,
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pub info: EnvInfo,
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pub schedule: Schedule,
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pub balances: HashMap<Address, U256>,
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pub tracing: bool,
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pub is_static: bool,
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chain_id: u64,
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}
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// similar to the normal `finalize` function, but ignoring NeedsReturn.
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pub fn test_finalize(res: Result<GasLeft>) -> Result<U256> {
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match res {
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Ok(GasLeft::Known(gas)) => Ok(gas),
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Ok(GasLeft::NeedsReturn { .. }) => unimplemented!(), // since ret is unimplemented.
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Err(e) => Err(e),
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}
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}
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impl FakeExt {
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/// New fake externalities
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pub fn new() -> Self {
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FakeExt::default()
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}
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/// New fake externalities with byzantium schedule rules
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pub fn new_byzantium() -> Self {
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let mut ext = FakeExt::default();
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ext.schedule = Schedule::new_byzantium();
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ext
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}
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/// New fake externalities with constantinople schedule rules
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pub fn new_constantinople() -> Self {
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let mut ext = FakeExt::default();
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ext.schedule = Schedule::new_constantinople();
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ext
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}
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/// New fake externalities with Istanbul schedule rules
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pub fn new_istanbul() -> Self {
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let mut ext = FakeExt::default();
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ext.schedule = Schedule::new_istanbul();
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ext
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}
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/// New fake externalities with Berlin schedule rules
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pub fn new_berlin() -> Self {
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let mut ext = FakeExt::default();
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ext.schedule = Schedule::new_berlin();
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ext
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}
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/// Alter fake externalities to allow wasm
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pub fn with_wasm(mut self) -> Self {
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self.schedule.wasm = Some(Default::default());
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self
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}
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/// Set chain ID
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pub fn with_chain_id(mut self, chain_id: u64) -> Self {
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self.chain_id = chain_id;
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self
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}
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}
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impl Ext for FakeExt {
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fn initial_storage_at(&self, _key: &H256) -> Result<H256> {
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Ok(H256::new())
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}
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fn storage_at(&self, key: &H256) -> Result<H256> {
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Ok(self.store.get(key).unwrap_or(&H256::new()).clone())
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}
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fn set_storage(&mut self, key: H256, value: H256) -> Result<()> {
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self.store.insert(key, value);
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Ok(())
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}
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fn exists(&self, address: &Address) -> Result<bool> {
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Ok(self.balances.contains_key(address))
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}
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fn exists_and_not_null(&self, address: &Address) -> Result<bool> {
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Ok(self.balances.get(address).map_or(false, |b| !b.is_zero()))
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}
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fn origin_balance(&self) -> Result<U256> {
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unimplemented!()
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}
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fn balance(&self, address: &Address) -> Result<U256> {
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Ok(self.balances[address])
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}
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fn blockhash(&mut self, number: &U256) -> H256 {
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self.blockhashes.get(number).unwrap_or(&H256::new()).clone()
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}
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fn create(
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&mut self,
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gas: &U256,
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value: &U256,
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code: &[u8],
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address: CreateContractAddress,
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_trap: bool,
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) -> ::std::result::Result<ContractCreateResult, TrapKind> {
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self.calls.insert(FakeCall {
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call_type: FakeCallType::Create,
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create_scheme: Some(address),
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gas: *gas,
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sender_address: None,
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receive_address: None,
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value: Some(*value),
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data: code.to_vec(),
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code_address: None,
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});
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// TODO: support traps in testing.
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Ok(ContractCreateResult::Failed)
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}
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fn call(
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&mut self,
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gas: &U256,
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sender_address: &Address,
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receive_address: &Address,
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value: Option<U256>,
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data: &[u8],
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code_address: &Address,
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_call_type: CallType,
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_trap: bool,
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) -> ::std::result::Result<MessageCallResult, TrapKind> {
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self.calls.insert(FakeCall {
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call_type: FakeCallType::Call,
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create_scheme: None,
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gas: *gas,
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sender_address: Some(sender_address.clone()),
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receive_address: Some(receive_address.clone()),
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value: value,
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data: data.to_vec(),
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code_address: Some(code_address.clone()),
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});
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// TODO: support traps in testing.
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Ok(MessageCallResult::Success(*gas, ReturnData::empty()))
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}
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fn extcode(&self, address: &Address) -> Result<Option<Arc<Bytes>>> {
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Ok(self.codes.get(address).cloned())
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}
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fn extcodesize(&self, address: &Address) -> Result<Option<usize>> {
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Ok(self.codes.get(address).map(|c| c.len()))
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}
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fn extcodehash(&self, address: &Address) -> Result<Option<H256>> {
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Ok(self.codes.get(address).map(|c| keccak(c.as_ref())))
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}
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fn log(&mut self, topics: Vec<H256>, data: &[u8]) -> Result<()> {
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self.logs.push(FakeLogEntry {
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topics,
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data: data.to_vec(),
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});
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Ok(())
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}
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fn ret(self, _gas: &U256, _data: &ReturnData, _apply_state: bool) -> Result<U256> {
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unimplemented!();
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}
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fn suicide(&mut self, refund_address: &Address) -> Result<()> {
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self.suicides.insert(refund_address.clone());
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Ok(())
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}
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fn schedule(&self) -> &Schedule {
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&self.schedule
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}
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fn env_info(&self) -> &EnvInfo {
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&self.info
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}
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fn chain_id(&self) -> u64 {
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self.chain_id
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}
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fn depth(&self) -> usize {
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self.depth
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}
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fn is_static(&self) -> bool {
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self.is_static
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}
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fn add_sstore_refund(&mut self, value: usize) {
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self.sstore_clears += value as i128;
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}
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fn sub_sstore_refund(&mut self, value: usize) {
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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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}
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}
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