59 lines
1.7 KiB
Rust
59 lines
1.7 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::fmt;
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use serde::{Serialize, Serializer, Deserialize, Deserializer};
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use serde::de::{Error as SerdeError, Visitor};
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use super::Error;
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#[derive(Debug, PartialEq)]
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pub enum Version {
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V3,
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}
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impl Serialize for Version {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
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where S: Serializer {
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match *self {
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Version::V3 => serializer.serialize_u64(3)
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}
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}
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}
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impl<'a> Deserialize<'a> for Version {
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fn deserialize<D>(deserializer: D) -> Result<Version, D::Error>
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where D: Deserializer<'a> {
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deserializer.deserialize_any(VersionVisitor)
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}
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}
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struct VersionVisitor;
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impl<'a> Visitor<'a> for VersionVisitor {
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type Value = Version;
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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write!(formatter, "a valid key version identifier")
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}
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fn visit_u64<E>(self, value: u64) -> Result<Self::Value, E> where E: SerdeError {
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match value {
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3 => Ok(Version::V3),
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_ => Err(SerdeError::custom(Error::UnsupportedVersion))
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}
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}
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}
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