openethereum/ethcore/src/error.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/>.
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//! General error types for use in ethcore.
use util::*;
use header::BlockNumber;
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use basic_types::LogBloom;
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use client::Error as ClientError;
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pub use types::executed::ExecutionError;
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#[derive(Debug, PartialEq)]
/// Errors concerning transaction processing.
pub enum TransactionError {
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/// Transaction is already imported to the queue
AlreadyImported,
/// Transaction is not valid anymore (state already has higher nonce)
Old,
/// Transaction has too low fee
/// (there is already a transaction with the same sender-nonce but higher gas price)
TooCheapToReplace,
/// Transaction was not imported to the queue because limit has been reached.
LimitReached,
/// Transaction's gas price is below threshold.
InsufficientGasPrice {
/// Minimal expected gas price
minimal: U256,
/// Transaction gas price
got: U256,
},
/// Sender doesn't have enough funds to pay for this transaction
InsufficientBalance {
/// Senders balance
balance: U256,
/// Transaction cost
cost: U256,
},
/// Transactions gas is higher then current gas limit
GasLimitExceeded {
/// Current gas limit
limit: U256,
/// Declared transaction gas
got: U256,
},
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/// Transaction's gas limit (aka gas) is invalid.
InvalidGasLimit(OutOfBounds<U256>),
/// Transaction is invalid for some other reason.
DAORescue,
}
impl fmt::Display for TransactionError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::TransactionError::*;
let msg = match *self {
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AlreadyImported => "Already imported".into(),
Old => "No longer valid".into(),
TooCheapToReplace => "Gas price too low to replace".into(),
LimitReached => "Transaction limit reached".into(),
InsufficientGasPrice { minimal, got } =>
format!("Insufficient gas price. Min={}, Given={}", minimal, got),
InsufficientBalance { balance, cost } =>
format!("Insufficient balance for transaction. Balance={}, Cost={}",
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balance, cost),
GasLimitExceeded { limit, got } =>
format!("Gas limit exceeded. Limit={}, Given={}", limit, got),
InvalidGasLimit(ref err) => format!("Invalid gas limit. {}", err),
DAORescue => "Transaction is invalid due to the DAO rescue.".into(),
};
f.write_fmt(format_args!("Transaction error ({})", msg))
}
}
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#[derive(Debug, PartialEq, Eq)]
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/// Errors concerning block processing.
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pub enum BlockError {
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/// Block has too many uncles.
TooManyUncles(OutOfBounds<usize>),
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/// Extra data is of an invalid length.
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ExtraDataOutOfBounds(OutOfBounds<usize>),
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/// Seal is incorrect format.
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InvalidSealArity(Mismatch<usize>),
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/// Block has too much gas used.
TooMuchGasUsed(OutOfBounds<U256>),
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/// Uncles hash in header is invalid.
InvalidUnclesHash(Mismatch<H256>),
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/// An uncle is from a generation too old.
UncleTooOld(OutOfBounds<BlockNumber>),
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/// An uncle is from the same generation as the block.
UncleIsBrother(OutOfBounds<BlockNumber>),
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/// An uncle is already in the chain.
UncleInChain(H256),
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/// An uncle has a parent not in the chain.
UncleParentNotInChain(H256),
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/// State root header field is invalid.
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InvalidStateRoot(Mismatch<H256>),
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/// Gas used header field is invalid.
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InvalidGasUsed(Mismatch<U256>),
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/// Transactions root header field is invalid.
InvalidTransactionsRoot(Mismatch<H256>),
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/// 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>),
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/// 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>),
/// Some low-level aspect of the seal is incorrect.
InvalidSeal,
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/// Gas limit header field is invalid.
InvalidGasLimit(OutOfBounds<U256>),
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/// Receipts trie root header field is invalid.
InvalidReceiptsRoot(Mismatch<H256>),
/// Timestamp header field is invalid.
InvalidTimestamp(OutOfBounds<u64>),
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/// Log bloom header field is invalid.
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InvalidLogBloom(Mismatch<LogBloom>),
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/// 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>),
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/// Number field of header is invalid.
InvalidNumber(Mismatch<BlockNumber>),
/// Block number isn't sensible.
RidiculousNumber(OutOfBounds<BlockNumber>),
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/// Parent given is unknown.
UnknownParent(H256),
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/// Uncle parent given is unknown.
UnknownUncleParent(H256),
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}
impl fmt::Display for BlockError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::BlockError::*;
let msg = match *self {
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TooManyUncles(ref oob) => format!("Block has too many uncles. {}", oob),
ExtraDataOutOfBounds(ref oob) => format!("Extra block data too long. {}", oob),
InvalidSealArity(ref mis) => format!("Block seal in incorrect format: {}", mis),
TooMuchGasUsed(ref oob) => format!("Block has too much gas used. {}", oob),
InvalidUnclesHash(ref mis) => format!("Block has invalid uncles hash: {}", mis),
UncleTooOld(ref oob) => format!("Uncle block is too old. {}", oob),
UncleIsBrother(ref oob) => format!("Uncle from same generation as block. {}", oob),
UncleInChain(ref hash) => format!("Uncle {} already in chain", hash),
UncleParentNotInChain(ref hash) => format!("Uncle {} has a parent not in the chain", hash),
InvalidStateRoot(ref mis) => format!("Invalid state root in header: {}", mis),
InvalidGasUsed(ref mis) => format!("Invalid gas used in header: {}", mis),
InvalidTransactionsRoot(ref mis) => format!("Invalid transactions root in header: {}", mis),
DifficultyOutOfBounds(ref oob) => format!("Invalid block difficulty: {}", oob),
InvalidDifficulty(ref mis) => format!("Invalid block difficulty: {}", mis),
MismatchedH256SealElement(ref mis) => format!("Seal element out of bounds: {}", mis),
InvalidProofOfWork(ref oob) => format!("Block has invalid PoW: {}", oob),
InvalidSeal => "Block has invalid seal.".into(),
InvalidGasLimit(ref oob) => format!("Invalid gas limit: {}", oob),
InvalidReceiptsRoot(ref mis) => format!("Invalid receipts trie root in header: {}", mis),
InvalidTimestamp(ref oob) => format!("Invalid timestamp in header: {}", oob),
InvalidLogBloom(ref oob) => format!("Invalid log bloom in header: {}", oob),
InvalidParentHash(ref mis) => format!("Invalid parent hash: {}", mis),
InvalidNumber(ref mis) => format!("Invalid number in header: {}", mis),
RidiculousNumber(ref oob) => format!("Implausible block number. {}", oob),
UnknownParent(ref hash) => format!("Unknown parent: {}", hash),
UnknownUncleParent(ref hash) => format!("Unknown uncle parent: {}", hash),
};
f.write_fmt(format_args!("Block error ({})", msg))
}
}
#[derive(Debug, PartialEq)]
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/// Import to the block queue result
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pub enum ImportError {
/// Already in the block chain.
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AlreadyInChain,
/// Already in the block queue.
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AlreadyQueued,
/// Already marked as bad from a previous import (could mean parent is bad).
KnownBad,
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}
impl fmt::Display for ImportError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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let msg = match *self {
ImportError::AlreadyInChain => "block already in chain",
ImportError::AlreadyQueued => "block already in the block queue",
ImportError::KnownBad => "block known to be bad",
};
f.write_fmt(format_args!("Block import error ({})", msg))
}
}
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#[derive(Debug)]
/// General error type which should be capable of representing all errors in ethcore.
pub enum Error {
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/// Client configuration error.
Client(ClientError),
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/// Error concerning a utility.
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Util(UtilError),
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/// Error concerning block processing.
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Block(BlockError),
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/// Unknown engine given.
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UnknownEngineName(String),
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/// Error concerning EVM code execution.
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Execution(ExecutionError),
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/// Error concerning transaction processing.
Transaction(TransactionError),
/// Error concerning block import.
Import(ImportError),
/// PoW hash is invalid or out of date.
PowHashInvalid,
/// The value of the nonce or mishash is invalid.
PowInvalid,
/// Error concerning TrieDBs
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Trie(TrieError),
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::Client(ref err) => f.write_fmt(format_args!("{}", err)),
Error::Util(ref err) => f.write_fmt(format_args!("{}", err)),
Error::Block(ref err) => f.write_fmt(format_args!("{}", err)),
Error::Execution(ref err) => f.write_fmt(format_args!("{}", err)),
Error::Transaction(ref err) => f.write_fmt(format_args!("{}", err)),
Error::Import(ref err) => f.write_fmt(format_args!("{}", err)),
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Error::UnknownEngineName(ref name) =>
f.write_fmt(format_args!("Unknown engine name ({})", name)),
Error::PowHashInvalid => f.write_str("Invalid or out of date PoW hash."),
Error::PowInvalid => f.write_str("Invalid nonce or mishash"),
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Error::Trie(ref err) => f.write_fmt(format_args!("{}", err)),
}
}
}
/// Result of import block operation.
pub type ImportResult = Result<H256, Error>;
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impl From<ClientError> for Error {
fn from(err: ClientError) -> Error {
Error::Client(err)
}
}
impl From<TransactionError> for Error {
fn from(err: TransactionError) -> Error {
Error::Transaction(err)
}
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}
impl From<ImportError> for Error {
fn from(err: ImportError) -> Error {
Error::Import(err)
}
}
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impl From<BlockError> for Error {
fn from(err: BlockError) -> Error {
Error::Block(err)
}
}
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impl From<ExecutionError> for Error {
fn from(err: ExecutionError) -> Error {
Error::Execution(err)
}
}
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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))
}
}
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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))
}
}
impl From<TrieError> for Error {
fn from(err: TrieError) -> Error {
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Error::Trie(err)
}
}
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// 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);*/