openethereum/ethcore/src/error.rs
2016-02-15 18:01:52 +03:00

223 lines
6.4 KiB
Rust

// 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/>.
//! General error types for use in ethcore.
use util::*;
use header::BlockNumber;
use basic_types::LogBloom;
/// Result of executing the transaction.
#[derive(PartialEq, Debug)]
pub enum ExecutionError {
/// Returned when there gas paid for transaction execution is
/// lower than base gas required.
NotEnoughBaseGas {
/// Absolute minimum gas required.
required: U256,
/// Gas provided.
got: U256
},
/// Returned when block (gas_used + gas) > gas_limit.
///
/// If gas =< gas_limit, upstream may try to execute the transaction
/// in next block.
BlockGasLimitReached {
/// Gas limit of block for transaction.
gas_limit: U256,
/// Gas used in block prior to transaction.
gas_used: U256,
/// Amount of gas in block.
gas: U256
},
/// Returned when transaction nonce does not match state nonce.
InvalidNonce {
/// Nonce expected.
expected: U256,
/// Nonce found.
got: U256
},
/// Returned when cost of transaction (value + gas_price * gas) exceeds
/// current sender balance.
NotEnoughCash {
/// Minimum required balance.
required: U512,
/// Actual balance.
got: U512
},
/// Returned when internal evm error occurs.
Internal
}
#[derive(Debug)]
/// Errors concerning transaction proessing.
pub enum TransactionError {
/// Transaction's gas limit (aka gas) is invalid.
InvalidGasLimit(OutOfBounds<U256>),
}
#[derive(Debug, PartialEq, Eq)]
/// Errors concerning block processing.
pub enum BlockError {
/// Block has too many uncles.
TooManyUncles(OutOfBounds<usize>),
/// Extra data is of an invalid length.
ExtraDataOutOfBounds(OutOfBounds<usize>),
/// Seal is incorrect format.
InvalidSealArity(Mismatch<usize>),
/// Block has too much gas used.
TooMuchGasUsed(OutOfBounds<U256>),
/// Uncles hash in header is invalid.
InvalidUnclesHash(Mismatch<H256>),
/// An uncle is from a generation too old.
UncleTooOld(OutOfBounds<BlockNumber>),
/// An uncle is from the same generation as the block.
UncleIsBrother(OutOfBounds<BlockNumber>),
/// An uncle is already in the chain.
UncleInChain(H256),
/// An uncle has a parent not in the chain.
UncleParentNotInChain(H256),
/// State root header field is invalid.
InvalidStateRoot(Mismatch<H256>),
/// Gas used header field is invalid.
InvalidGasUsed(Mismatch<U256>),
/// Transactions root header field is invalid.
InvalidTransactionsRoot(Mismatch<H256>),
/// Difficulty is out of range; this can be used as an looser error prior to getting a definitive
/// value for difficulty. This error needs only provide bounds of which it is out.
DifficultyOutOfBounds(OutOfBounds<U256>),
/// Difficulty header field is invalid; this is a strong error used after getting a definitive
/// value for difficulty (which is provided).
InvalidDifficulty(Mismatch<U256>),
/// Seal element of type H256 (max_hash for Ethash, but could be something else for
/// other seal engines) is out of bounds.
MismatchedH256SealElement(Mismatch<H256>),
/// Proof-of-work aspect of seal, which we assume is a 256-bit value, is invalid.
InvalidProofOfWork(OutOfBounds<U256>),
/// Gas limit header field is invalid.
InvalidGasLimit(OutOfBounds<U256>),
/// Receipts trie root header field is invalid.
InvalidReceiptsRoot(Mismatch<H256>),
/// Timestamp header field is invalid.
InvalidTimestamp(OutOfBounds<u64>),
/// Log bloom header field is invalid.
InvalidLogBloom(Mismatch<LogBloom>),
/// Parent hash field of header is invalid; this is an invalid error indicating a logic flaw in the codebase.
/// TODO: remove and favour an assert!/panic!.
InvalidParentHash(Mismatch<H256>),
/// Number field of header is invalid.
InvalidNumber(Mismatch<BlockNumber>),
/// Block number isn't sensible.
RidiculousNumber(OutOfBounds<BlockNumber>),
/// Parent given is unknown.
UnknownParent(H256),
/// Uncle parent given is unknown.
UnknownUncleParent(H256),
}
#[derive(Debug)]
/// Import to the block queue result
pub enum ImportError {
/// Bad block detected
Bad(Option<Error>),
/// Already in the block chain
AlreadyInChain,
/// Already in the block queue
AlreadyQueued,
/// Unknown parent
UnknownParent,
}
impl From<Error> for ImportError {
fn from(err: Error) -> ImportError {
ImportError::Bad(Some(err))
}
}
/// Result of import block operation.
pub type ImportResult = Result<H256, ImportError>;
#[derive(Debug)]
/// General error type which should be capable of representing all errors in ethcore.
pub enum Error {
/// Error concerning a utility.
Util(UtilError),
/// Error concerning block processing.
Block(BlockError),
/// Unknown engine given.
UnknownEngineName(String),
/// Error concerning EVM code execution.
Execution(ExecutionError),
/// Error concerning transaction processing.
Transaction(TransactionError),
}
impl From<TransactionError> for Error {
fn from(err: TransactionError) -> Error {
Error::Transaction(err)
}
}
impl From<BlockError> for Error {
fn from(err: BlockError) -> Error {
Error::Block(err)
}
}
impl From<ExecutionError> for Error {
fn from(err: ExecutionError) -> Error {
Error::Execution(err)
}
}
impl From<CryptoError> for Error {
fn from(err: CryptoError) -> Error {
Error::Util(UtilError::Crypto(err))
}
}
impl From<DecoderError> for Error {
fn from(err: DecoderError) -> Error {
Error::Util(UtilError::Decoder(err))
}
}
impl From<UtilError> for Error {
fn from(err: UtilError) -> Error {
Error::Util(err)
}
}
impl From<IoError> for Error {
fn from(err: IoError) -> Error {
Error::Util(From::from(err))
}
}
// TODO: uncomment below once https://github.com/rust-lang/rust/issues/27336 sorted.
/*#![feature(concat_idents)]
macro_rules! assimilate {
($name:ident) => (
impl From<concat_idents!($name, Error)> for Error {
fn from(err: concat_idents!($name, Error)) -> Error {
Error:: $name (err)
}
}
)
}
assimilate!(FromHex);
assimilate!(BaseData);*/