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| // Copyright 2019-2021 Parity Technologies (UK) Ltd. | ||
| // This file is part of substrate-desub. | ||
| // | ||
| // substrate-desub 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. | ||
| // | ||
| // substrate-desub 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 substrate-desub. If not, see <http://www.gnu.org/licenses/>. | ||
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| //! Copy of this: https://substrate.dev/rustdocs/latest/pallet_identity/enum.Data.html | ||
| //! For the purpose of Decoding the Data field. | ||
| //! Because of the specificity/complexity of decoding: | ||
| //! - `BoundedVec` includes private tuple fields with no getters so Serde `remote` does not work | ||
| //! - `Data` has a special way of encoding/decoding | ||
| //! Data impl is copied over and must be maintaned against substrate master. | ||
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| use codec::{Decode, Encode}; | ||
| use serde::{Serialize, Deserialize}; | ||
| use std::iter::once; | ||
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| /// Either underlying data blob if it is at most 32 bytes, or a hash of it. If the data is greater | ||
| /// than 32-bytes then it will be truncated when encoding. | ||
| /// | ||
| /// Can also be `None`. | ||
| #[derive(Clone, Eq, PartialEq, Debug, Serialize, Deserialize)] | ||
| pub enum Data { | ||
| /// No data here. | ||
| None, | ||
| /// The data is stored directly. | ||
| Raw(Vec<u8>), | ||
| /// Only the Blake2 hash of the data is stored. The preimage of the hash may be retrieved | ||
| /// through some hash-lookup service. | ||
| BlakeTwo256([u8; 32]), | ||
| /// Only the SHA2-256 hash of the data is stored. The preimage of the hash may be retrieved | ||
| /// through some hash-lookup service. | ||
| Sha256([u8; 32]), | ||
| /// Only the Keccak-256 hash of the data is stored. The preimage of the hash may be retrieved | ||
| /// through some hash-lookup service. | ||
| Keccak256([u8; 32]), | ||
| /// Only the SHA3-256 hash of the data is stored. The preimage of the hash may be retrieved | ||
| /// through some hash-lookup service. | ||
| ShaThree256([u8; 32]), | ||
| } | ||
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| impl Decode for Data { | ||
| fn decode<I: codec::Input>(input: &mut I) -> Result<Self, codec::Error> { | ||
| let b = input.read_byte()?; | ||
| Ok(match b { | ||
| 0 => Data::None, | ||
| n @ 1 ..= 33 => { | ||
| let mut r = vec![0u8; n as usize - 1]; | ||
| input.read(&mut r[..])?; | ||
| Data::Raw(r) | ||
| } | ||
| 34 => Data::BlakeTwo256(<[u8; 32]>::decode(input)?), | ||
| 35 => Data::Sha256(<[u8; 32]>::decode(input)?), | ||
| 36 => Data::Keccak256(<[u8; 32]>::decode(input)?), | ||
| 37 => Data::ShaThree256(<[u8; 32]>::decode(input)?), | ||
| _ => return Err(codec::Error::from("invalid leading byte")), | ||
| }) | ||
| } | ||
| } | ||
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| impl Encode for Data { | ||
| fn encode(&self) -> Vec<u8> { | ||
| match self { | ||
| Data::None => vec![0u8; 1], | ||
| Data::Raw(ref x) => { | ||
| let l = x.len().min(32); | ||
| let mut r = vec![l as u8 + 1; l + 1]; | ||
| r[1..].copy_from_slice(&x[..l as usize]); | ||
| r | ||
| } | ||
| Data::BlakeTwo256(ref h) => once(34u8).chain(h.iter().cloned()).collect(), | ||
| Data::Sha256(ref h) => once(35u8).chain(h.iter().cloned()).collect(), | ||
| Data::Keccak256(ref h) => once(36u8).chain(h.iter().cloned()).collect(), | ||
| Data::ShaThree256(ref h) => once(37u8).chain(h.iter().cloned()).collect(), | ||
| } | ||
| } | ||
| } | ||
| impl codec::EncodeLike for Data {} | ||
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| impl Default for Data { | ||
| fn default() -> Self { | ||
| Self::None | ||
| } | ||
| } | ||
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