54 lines
1.5 KiB
Rust
54 lines
1.5 KiB
Rust
// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity 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 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. If not, see <http://www.gnu.org/licenses/>.
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use util::hash::H256;
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use util::bytes::Bytes;
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use util::sha3::Hashable;
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use views::BlockView;
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#[derive(Default, Clone)]
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pub struct BlockFinalizer {
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parent_hash: H256
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}
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impl BlockFinalizer {
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pub fn fork(&self) -> Self {
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self.clone()
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}
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}
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pub trait CompleteBlock {
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fn complete(self, parent_hash: H256) -> Bytes;
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}
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pub struct Complete<'a, I> where I: 'a {
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pub iter: &'a mut I,
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pub finalizer: &'a mut BlockFinalizer,
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}
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impl<'a, I> Iterator for Complete<'a, I> where I: Iterator, <I as Iterator>::Item: CompleteBlock {
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type Item = Bytes;
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#[inline]
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fn next(&mut self) -> Option<Self::Item> {
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self.iter.next().map(|item| {
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let rlp = item.complete(self.finalizer.parent_hash.clone());
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self.finalizer.parent_hash = BlockView::new(&rlp).header_view().sha3();
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rlp
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})
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}
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}
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