openethereum/src/error.rs

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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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#[derive(Debug, PartialEq, Eq)]
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pub struct Mismatch<T: fmt::Debug> {
pub expected: T,
pub found: T,
}
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#[derive(Debug, PartialEq, Eq)]
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pub struct OutOfBounds<T: fmt::Debug> {
pub min: Option<T>,
pub max: Option<T>,
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pub found: T,
}
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/// Result of executing the transaction.
#[derive(PartialEq, Debug)]
pub enum ExecutionError {
/// 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: U256, gas_used: U256, gas: U256 },
/// Returned when transaction nonce does not match state nonce.
InvalidNonce { expected: U256, is: U256 },
/// Returned when cost of transaction (value + gas_price * gas) exceeds
/// current sender balance.
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NotEnoughCash { required: U512, is: U512 },
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/// Returned when internal evm error occurs.
Internal
}
#[derive(Debug)]
pub enum TransactionError {
InvalidGasLimit(OutOfBounds<U256>),
}
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#[derive(Debug, PartialEq, Eq)]
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pub enum BlockError {
TooManyUncles(OutOfBounds<usize>),
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UncleWrongGeneration,
ExtraDataOutOfBounds(OutOfBounds<usize>),
InvalidSealArity(Mismatch<usize>),
TooMuchGasUsed(OutOfBounds<U256>),
InvalidUnclesHash(Mismatch<H256>),
UncleTooOld(OutOfBounds<BlockNumber>),
UncleIsBrother(OutOfBounds<BlockNumber>),
UncleInChain(H256),
UncleParentNotInChain(H256),
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InvalidStateRoot(Mismatch<H256>),
InvalidGasUsed(Mismatch<U256>),
InvalidTransactionsRoot(Mismatch<H256>),
InvalidDifficulty(Mismatch<U256>),
InvalidGasLimit(OutOfBounds<U256>),
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InvalidReceiptsStateRoot(Mismatch<H256>),
InvalidTimestamp(OutOfBounds<u64>),
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InvalidLogBloom(Mismatch<LogBloom>),
InvalidBlockNonce(Mismatch<H256>),
InvalidParentHash(Mismatch<H256>),
InvalidNumber(OutOfBounds<BlockNumber>),
UnknownParent(H256),
UnknownUncleParent(H256),
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}
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#[derive(Debug)]
pub enum ImportError {
Bad(Error),
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AlreadyInChain,
AlreadyQueued,
}
impl From<Error> for ImportError {
fn from(err: Error) -> ImportError {
ImportError::Bad(err)
}
}
/// Result of import block operation.
pub type ImportResult = Result<(), ImportError>;
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#[derive(Debug)]
/// General error type which should be capable of representing all errors in ethcore.
pub enum Error {
Util(UtilError),
Block(BlockError),
UnknownEngineName(String),
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Execution(ExecutionError),
Transaction(TransactionError),
}
impl From<TransactionError> for Error {
fn from(err: TransactionError) -> Error {
Error::Transaction(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))
}
}
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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);*/