149 lines
4.3 KiB
Rust
149 lines
4.3 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 serde::{
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de::{Error, Visitor},
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Deserialize, Deserializer,
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};
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use std::fmt;
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use ethereum_types::H256;
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/// Type of derivation
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pub enum DerivationType {
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/// Soft - allow proof of parent
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Soft,
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/// Hard - does not allow proof of parent
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Hard,
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}
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/// Derivation request by hash
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#[allow(dead_code)]
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#[derive(Deserialize)]
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pub struct DeriveHash {
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hash: H256,
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#[serde(rename = "type")]
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d_type: DerivationType,
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}
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/// Node propertoes in hierarchical derivation request
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#[allow(dead_code)]
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#[derive(Deserialize)]
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pub struct DeriveHierarchicalItem {
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index: u64,
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#[serde(rename = "type")]
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d_type: DerivationType,
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}
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/// Hierarchical (index sequence) request
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pub type DeriveHierarchical = Vec<DeriveHierarchicalItem>;
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/// Generic derivate request
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pub enum Derive {
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/// Hierarchical (index sequence) request
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Hierarchical(DeriveHierarchical),
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/// Hash request
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Hash(DeriveHash),
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}
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impl From<DeriveHierarchical> for Derive {
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fn from(d: DeriveHierarchical) -> Self {
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Derive::Hierarchical(d)
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}
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}
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impl From<DeriveHash> for Derive {
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fn from(d: DeriveHash) -> Self {
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Derive::Hash(d)
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}
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}
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/// Error converting request data
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#[cfg(any(test, feature = "accounts"))]
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#[derive(Debug)]
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pub enum ConvertError {
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IndexOverlfow(u64),
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}
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impl Derive {
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/// Convert to account provider struct dealing with possible overflows
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#[cfg(any(test, feature = "accounts"))]
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pub fn to_derivation(self) -> Result<ethstore::Derivation, ConvertError> {
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Ok(match self {
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Derive::Hierarchical(drv) => ethstore::Derivation::Hierarchical({
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let mut members = Vec::<ethstore::IndexDerivation>::new();
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for h in drv {
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if h.index > ::std::u32::MAX as u64 {
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return Err(ConvertError::IndexOverlfow(h.index));
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}
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members.push(match h.d_type {
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DerivationType::Soft => ethstore::IndexDerivation {
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soft: true,
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index: h.index as u32,
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},
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DerivationType::Hard => ethstore::IndexDerivation {
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soft: false,
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index: h.index as u32,
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},
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});
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}
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members
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}),
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Derive::Hash(drv) => match drv.d_type {
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DerivationType::Soft => ethstore::Derivation::SoftHash(drv.hash.into()),
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DerivationType::Hard => ethstore::Derivation::HardHash(drv.hash.into()),
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},
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})
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}
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}
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impl<'a> Deserialize<'a> for DerivationType {
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fn deserialize<D>(deserializer: D) -> Result<DerivationType, D::Error>
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where
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D: Deserializer<'a>,
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{
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deserializer.deserialize_any(DerivationTypeVisitor)
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}
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}
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struct DerivationTypeVisitor;
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impl<'a> Visitor<'a> for DerivationTypeVisitor {
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type Value = DerivationType;
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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write!(formatter, "'hard' or 'soft'")
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}
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fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
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where
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E: Error,
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{
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match value {
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"soft" => Ok(DerivationType::Soft),
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"hard" => Ok(DerivationType::Hard),
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v => Err(Error::custom(format!("invalid derivation type: {:?}", v))),
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}
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}
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fn visit_string<E>(self, value: String) -> Result<Self::Value, E>
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where
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E: Error,
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{
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self.visit_str(value.as_ref())
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}
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}
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