42 lines
1.3 KiB
Rust
42 lines
1.3 KiB
Rust
// Copyright 2015-2017 Parity Technologies
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Common RLP traits
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use elastic_array::ElasticArray1024;
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use {DecoderError, UntrustedRlp, RlpStream};
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/// RLP decodable trait
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pub trait Decodable: Sized {
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/// Decode a value from RLP bytes
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fn decode(rlp: &UntrustedRlp) -> Result<Self, DecoderError>;
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}
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/// Structure encodable to RLP
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pub trait Encodable {
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/// Append a value to the stream
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fn rlp_append(&self, s: &mut RlpStream);
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/// Get rlp-encoded bytes for this instance
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fn rlp_bytes(&self) -> ElasticArray1024<u8> {
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let mut s = RlpStream::new();
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self.rlp_append(&mut s);
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s.drain()
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}
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}
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/// Trait for compressing and decompressing RLP by replacement of common terms.
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pub trait Compressible: Sized {
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/// Indicates the origin of RLP to be compressed.
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type DataType;
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/// Compress given RLP type using appropriate methods.
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fn compress(&self, t: Self::DataType) -> ElasticArray1024<u8>;
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/// Decompress given RLP type using appropriate methods.
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fn decompress(&self, t: Self::DataType) -> ElasticArray1024<u8>;
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}
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