73 lines
1.9 KiB
Rust
73 lines
1.9 KiB
Rust
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity 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 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. If not, see <http://www.gnu.org/licenses/>.
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//! General error types for use in ethcore.
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#![allow(missing_docs)]
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#![allow(unknown_lints)]
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#[macro_use]
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extern crate error_chain;
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extern crate ethcore_bigint as bigint;
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extern crate rlp;
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extern crate rustc_hex;
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use std::fmt;
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use rustc_hex::FromHexError;
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use rlp::DecoderError;
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use bigint::hash::H256;
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#[derive(Debug)]
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/// Error in database subsystem.
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pub enum BaseDataError {
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/// An entry was removed more times than inserted.
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NegativelyReferencedHash(H256),
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/// A committed value was inserted more than once.
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AlreadyExists(H256),
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}
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impl fmt::Display for BaseDataError {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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match *self {
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BaseDataError::NegativelyReferencedHash(hash) =>
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write!(f, "Entry {} removed from database more times than it was added.", hash),
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BaseDataError::AlreadyExists(hash) =>
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write!(f, "Committed key already exists in database: {}", hash),
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}
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}
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}
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impl std::error::Error for BaseDataError {
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fn description(&self) -> &str {
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"Error in database subsystem"
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}
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}
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error_chain! {
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types {
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UtilError, ErrorKind, ResultExt, Result;
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}
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foreign_links {
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Io(::std::io::Error);
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FromHex(FromHexError);
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Decoder(DecoderError);
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BaseData(BaseDataError);
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}
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}
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