149 lines
4.2 KiB
Rust
149 lines
4.2 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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//! Light client implementation. Stores data from light sync
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use std::sync::Arc;
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use ethcore::engines::Engine;
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use ethcore::ids::BlockId;
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use ethcore::block_import_error::BlockImportError;
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use ethcore::block_status::BlockStatus;
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use ethcore::verification::queue::{HeaderQueue, QueueInfo, Config as QueueConfig};
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use ethcore::transaction::SignedTransaction;
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use ethcore::blockchain_info::BlockChainInfo;
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use ethcore::spec::Spec;
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use ethcore::service::ClientIoMessage;
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use io::IoChannel;
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use util::hash::{H256, H256FastMap};
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use util::{Bytes, Mutex};
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use provider::Provider;
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use request;
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use self::header_chain::HeaderChain;
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mod header_chain;
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/// Configuration for the light client.
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#[derive(Debug, Default, Clone)]
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pub struct Config {
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queue: QueueConfig,
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}
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/// Light client implementation.
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pub struct Client {
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queue: HeaderQueue,
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chain: HeaderChain,
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tx_pool: Mutex<H256FastMap<SignedTransaction>>,
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}
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impl Client {
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/// Create a new `Client`.
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pub fn new(config: Config, spec: &Spec, io_channel: IoChannel<ClientIoMessage>) -> Self {
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Client {
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queue: HeaderQueue::new(config.queue, spec.engine.clone(), io_channel, true),
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chain: HeaderChain::new(&::rlp::encode(&spec.genesis_header())),
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tx_pool: Mutex::new(Default::default()),
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}
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}
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/// Import a header as rlp-encoded bytes.
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pub fn import_header(&self, bytes: Bytes) -> Result<H256, BlockImportError> {
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let header = ::rlp::decode(&bytes);
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self.queue.import(header).map_err(Into::into)
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}
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/// Import a local transaction.
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pub fn import_own_transaction(&self, tx: SignedTransaction) {
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self.tx_pool.lock().insert(tx.hash(), tx);
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}
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/// Fetch a vector of all pending transactions.
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pub fn pending_transactions(&self) -> Vec<SignedTransaction> {
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self.tx_pool.lock().values().cloned().collect()
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}
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/// Inquire about the status of a given block (or header).
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pub fn status(&self, id: BlockId) -> BlockStatus {
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BlockStatus::Unknown
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}
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/// Get the header queue info.
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pub fn queue_info(&self) -> QueueInfo {
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self.queue.queue_info()
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}
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}
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// dummy implementation -- may draw from canonical cache further on.
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impl Provider for Client {
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fn chain_info(&self) -> BlockChainInfo {
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let best_block = self.chain.best_block();
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let first_block = self.chain.first_block();
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let genesis_hash = self.chain.genesis_hash();
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BlockChainInfo {
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total_difficulty: best_block.total_difficulty,
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pending_total_difficulty: best_block.total_difficulty,
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genesis_hash: genesis_hash,
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best_block_hash: best_block.hash,
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best_block_number: best_block.number,
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ancient_block_hash: if first_block.is_some() { Some(genesis_hash) } else { None },
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ancient_block_number: if first_block.is_some() { Some(0) } else { None },
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first_block_hash: first_block.as_ref().map(|first| first.hash),
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first_block_number: first_block.as_ref().map(|first| first.number),
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}
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}
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fn reorg_depth(&self, _a: &H256, _b: &H256) -> Option<u64> {
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None
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}
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fn earliest_state(&self) -> Option<u64> {
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None
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}
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fn block_headers(&self, _req: request::Headers) -> Vec<Bytes> {
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Vec::new()
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}
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fn block_bodies(&self, _req: request::Bodies) -> Vec<Bytes> {
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Vec::new()
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}
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fn receipts(&self, _req: request::Receipts) -> Vec<Bytes> {
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Vec::new()
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}
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fn proofs(&self, _req: request::StateProofs) -> Vec<Bytes> {
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Vec::new()
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}
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fn contract_code(&self, _req: request::ContractCodes) -> Vec<Bytes> {
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Vec::new()
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}
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fn header_proofs(&self, _req: request::HeaderProofs) -> Vec<Bytes> {
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Vec::new()
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}
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fn pending_transactions(&self) -> Vec<SignedTransaction> {
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Client::pending_transactions(self)
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}
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}
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