openethereum/ethcore/src/extras.rs

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// Copyright 2015, 2016 Ethcore (UK) Ltd.
// This file is part of Parity.
// Parity 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.
// Parity 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 Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Blockchain DB extras.
use util::*;
use header::BlockNumber;
use receipt::Receipt;
use db::Key;
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/// Represents index of extra data in database
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#[derive(Copy, Debug, Hash, Eq, PartialEq, Clone)]
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pub enum ExtrasIndex {
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/// Block details index
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BlockDetails = 0,
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/// Block hash index
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BlockHash = 1,
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/// Transaction address index
TransactionAddress = 2,
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/// Block log blooms index
BlockLogBlooms = 3,
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/// Block blooms index
BlocksBlooms = 4,
/// Block receipts index
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BlockReceipts = 5,
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}
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fn with_index(hash: &H256, i: ExtrasIndex) -> H264 {
let mut slice = H264::from_slice(hash);
slice[32] = i as u8;
slice
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}
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pub trait ExtrasIndexable {
fn index() -> ExtrasIndex;
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}
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impl ExtrasIndexable for H256 {
fn index() -> ExtrasIndex {
ExtrasIndex::BlockHash
}
}
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impl ExtrasIndexable for BlockDetails {
fn index() -> ExtrasIndex {
ExtrasIndex::BlockDetails
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}
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}
impl ExtrasIndexable for TransactionAddress {
fn index() -> ExtrasIndex {
ExtrasIndex::TransactionAddress
}
}
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impl ExtrasIndexable for BlockLogBlooms {
fn index() -> ExtrasIndex {
ExtrasIndex::BlockLogBlooms
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}
}
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impl ExtrasIndexable for BlocksBlooms {
fn index() -> ExtrasIndex {
ExtrasIndex::BlocksBlooms
}
}
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impl ExtrasIndexable for BlockReceipts {
fn index() -> ExtrasIndex {
ExtrasIndex::BlockReceipts
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}
}
impl Key<H256> for BlockNumber {
fn key(&self) -> H264 {
with_index(&H256::from(*self), ExtrasIndex::BlockHash)
}
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}
impl Key<BlockDetails> for H256 {
fn key(&self) -> H264 {
with_index(self, ExtrasIndex::BlockDetails)
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}
}
impl Key<TransactionAddress> for H256 {
fn key(&self) -> H264 {
with_index(self, ExtrasIndex::TransactionAddress)
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}
}
impl Key<BlockLogBlooms> for H256 {
fn key(&self) -> H264 {
with_index(self, ExtrasIndex::BlockLogBlooms)
}
}
impl Key<BlocksBlooms> for H256 {
fn key(&self) -> H264 {
with_index(self, ExtrasIndex::BlocksBlooms)
}
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}
impl Key<BlockReceipts> for H256 {
fn key(&self) -> H264 {
with_index(self, ExtrasIndex::BlockReceipts)
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}
}
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/// Familial details concerning a block
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#[derive(Debug, Clone)]
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pub struct BlockDetails {
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/// Block number
pub number: BlockNumber,
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/// Total difficulty of the block and all its parents
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pub total_difficulty: U256,
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/// Parent block hash
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pub parent: H256,
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/// List of children block hashes
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pub children: Vec<H256>
}
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impl HeapSizeOf for BlockDetails {
fn heap_size_of_children(&self) -> usize {
self.children.heap_size_of_children()
}
}
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impl Decodable for BlockDetails {
fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
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let d = decoder.as_rlp();
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let details = BlockDetails {
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number: try!(d.val_at(0)),
total_difficulty: try!(d.val_at(1)),
parent: try!(d.val_at(2)),
children: try!(d.val_at(3)),
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};
Ok(details)
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}
}
impl Encodable for BlockDetails {
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fn rlp_append(&self, s: &mut RlpStream) {
s.begin_list(4);
s.append(&self.number);
s.append(&self.total_difficulty);
s.append(&self.parent);
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s.append(&self.children);
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}
}
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/// Log blooms of certain block
#[derive(Clone)]
pub struct BlockLogBlooms {
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/// List of log blooms for the block
pub blooms: Vec<H2048>
}
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impl HeapSizeOf for BlockLogBlooms {
fn heap_size_of_children(&self) -> usize {
self.blooms.heap_size_of_children()
}
}
impl Decodable for BlockLogBlooms {
fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
let block_blooms = BlockLogBlooms {
blooms: try!(Decodable::decode(decoder))
};
Ok(block_blooms)
}
}
impl Encodable for BlockLogBlooms {
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fn rlp_append(&self, s: &mut RlpStream) {
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s.append(&self.blooms);
}
}
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/// Neighboring log blooms on certain level
pub struct BlocksBlooms {
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/// List of block blooms.
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pub blooms: [H2048; 16],
}
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impl Default for BlocksBlooms {
fn default() -> Self {
BlocksBlooms::new()
}
}
impl BlocksBlooms {
pub fn new() -> Self {
BlocksBlooms { blooms: unsafe { ::std::mem::zeroed() }}
}
}
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impl HeapSizeOf for BlocksBlooms {
fn heap_size_of_children(&self) -> usize { 0 }
}
impl Clone for BlocksBlooms {
fn clone(&self) -> Self {
let mut blooms: [H2048; 16] = unsafe { ::std::mem::uninitialized() };
for i in 0..self.blooms.len() {
blooms[i] = self.blooms[i].clone();
}
BlocksBlooms {
blooms: blooms
}
}
}
impl Decodable for BlocksBlooms {
fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
let blocks_blooms = BlocksBlooms {
blooms: try!(Decodable::decode(decoder))
};
Ok(blocks_blooms)
}
}
impl Encodable for BlocksBlooms {
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fn rlp_append(&self, s: &mut RlpStream) {
let blooms_ref: &[H2048] = &self.blooms;
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s.append(&blooms_ref);
}
}
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/// Represents address of certain transaction within block
#[derive(Clone)]
pub struct TransactionAddress {
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/// Block hash
pub block_hash: H256,
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/// Transaction index within the block
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pub index: usize
}
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impl HeapSizeOf for TransactionAddress {
fn heap_size_of_children(&self) -> usize { 0 }
}
impl Decodable for TransactionAddress {
fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
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let d = decoder.as_rlp();
let tx_address = TransactionAddress {
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block_hash: try!(d.val_at(0)),
index: try!(d.val_at(1)),
};
Ok(tx_address)
}
}
impl Encodable for TransactionAddress {
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fn rlp_append(&self, s: &mut RlpStream) {
s.begin_list(2);
s.append(&self.block_hash);
s.append(&self.index);
}
}
/// Contains all block receipts.
#[derive(Clone)]
pub struct BlockReceipts {
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pub receipts: Vec<Receipt>,
}
impl BlockReceipts {
pub fn new(receipts: Vec<Receipt>) -> Self {
BlockReceipts {
receipts: receipts
}
}
}
impl Decodable for BlockReceipts {
fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
Ok(BlockReceipts {
receipts: try!(Decodable::decode(decoder))
})
}
}
impl Encodable for BlockReceipts {
fn rlp_append(&self, s: &mut RlpStream) {
s.append(&self.receipts);
}
}
impl HeapSizeOf for BlockReceipts {
fn heap_size_of_children(&self) -> usize {
self.receipts.heap_size_of_children()
}
}