95 lines
2.7 KiB
Rust
95 lines
2.7 KiB
Rust
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// Copyright 2015, 2016 Ethcore (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. Used for raw data queries as well as the header
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//! sync.
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use std::sync::Arc;
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use engines::Engine;
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use ids::BlockID;
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use miner::TransactionQueue;
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use service::ClientIoMessage;
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use block_import_error::BlockImportError;
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use block_status::BlockStatus;
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use verification::queue::{Config as QueueConfig, HeaderQueue, QueueInfo, Status};
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use transaction::SignedTransaction;
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use super::provider::{CHTProofRequest, Provider, ProofRequest};
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use io::IoChannel;
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use util::hash::H256;
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use util::Bytes;
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/// A light client.
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pub struct Client {
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engine: Arc<Engine>,
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header_queue: HeaderQueue,
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message_channel: IoChannel<ClientIoMessage>,
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transaction_queue: TransactionQueue,
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}
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impl Client {
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/// Import a header as rlp-encoded bytes.
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fn import_header(&self, bytes: Bytes) -> Result<H256, BlockImportError> {
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let header = ::rlp::decode(&bytes);
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self.header_queue.import(header).map_err(Into::into)
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}
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/// Whether the block is already known (but not necessarily part of the canonical chain)
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fn is_known(&self, id: BlockID) -> bool {
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false
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}
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/// Fetch a vector of all pending transactions.
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fn pending_transactions(&self) -> Vec<SignedTransaction> {
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self.transaction_queue.top_transactions()
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}
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/// Inquire about the status of a given block.
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fn status(&self, id: BlockID) -> BlockStatus {
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BlockStatus::Unknown
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}
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}
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// stub implementation, can be partially implemented using LRU-caches
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// but will almost definitely never be able to provide complete responses.
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impl Provider for Client {
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fn block_headers(&self, _block: H256, _skip: usize, _max: usize, _reverse: bool) -> Vec<Bytes> {
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vec![]
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}
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fn block_bodies(&self, _blocks: Vec<H256>) -> Vec<Bytes> {
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vec![]
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}
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fn receipts(&self, _blocks: Vec<H256>) -> Vec<Bytes> {
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vec![]
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}
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fn proofs(&self, _requests: Vec<(H256, ProofRequest)>) -> Vec<Bytes> {
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vec![]
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}
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fn code(&self, _accounts: Vec<(H256, H256)>) -> Vec<Bytes> {
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vec![]
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}
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fn header_proofs(&self, _requests: Vec<CHTProofRequest>) -> Vec<Bytes> {
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vec![]
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}
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}
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