mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Squirrel
64 lines
1.8 KiB
Rust
64 lines
1.8 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2017-2021 Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// tag::description[]
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//! Generic implementations of Extrinsic/Header/Block.
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// end::description[]
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mod unchecked_extrinsic;
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mod era;
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mod checked_extrinsic;
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mod header;
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mod block;
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mod digest;
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#[cfg(test)]
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mod tests;
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pub use self::unchecked_extrinsic::{UncheckedExtrinsic, SignedPayload};
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pub use self::era::{Era, Phase};
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pub use self::checked_extrinsic::CheckedExtrinsic;
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pub use self::header::Header;
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pub use self::block::{Block, SignedBlock, BlockId};
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pub use self::digest::{
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Digest, DigestItem, DigestItemRef, OpaqueDigestItemId, ChangesTrieSignal,
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};
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use crate::codec::Encode;
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use sp_std::prelude::*;
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fn encode_with_vec_prefix<T: Encode, F: Fn(&mut Vec<u8>)>(encoder: F) -> Vec<u8> {
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let size = ::sp_std::mem::size_of::<T>();
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let reserve = match size {
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0..=0b00111111 => 1,
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0b01000000..=0b00111111_11111111 => 2,
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_ => 4,
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};
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let mut v = Vec::with_capacity(reserve + size);
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v.resize(reserve, 0);
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encoder(&mut v);
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// need to prefix with the total length to ensure it's binary compatible with
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// Vec<u8>.
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let mut length: Vec<()> = Vec::new();
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length.resize(v.len() - reserve, ());
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length.using_encoded(|s| {
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v.splice(0..reserve, s.iter().cloned());
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});
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v
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}
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