mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-06-11 23:31:07 +00:00
Fix warning and directory restructure.
This commit is contained in:
Gav
@@ -1,54 +0,0 @@
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// Copyright 2017 Parity Technologies (UK) Ltd.
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// This file is part of Polkadot.
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// Polkadot 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
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
|
||||
// Polkadot 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.
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||||
|
||||
// You should have received a copy of the GNU General Public License
|
||||
// along with Polkadot. If not, see <http://www.gnu.org/licenses/>.
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//! Polkadot Client data backend
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use state_machine;
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use error;
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use primitives::block;
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use blockchain::{self, BlockId};
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/// Block insertion transction. Keeps hold if the inseted block state and data.
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pub trait BlockImportOperation {
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/// Associated state backend type.
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type State: state_machine::backend::Backend;
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/// Returns pending state.
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fn state(&self) -> error::Result<Self::State>;
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/// Append block data to the transaction.
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fn import_block(&mut self, header: block::Header, body: Option<block::Body>, is_new_best: bool) -> error::Result<()>;
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/// Inject storage data into the database.
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fn reset_storage<I: Iterator<Item=(Vec<u8>, Vec<u8>)>>(&mut self, iter: I) -> error::Result<()>;
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}
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/// Client backend. Manages the data layer.
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pub trait Backend {
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/// Associated block insertion transaction type.
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type BlockImportOperation: BlockImportOperation;
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/// Associated blockchain backend type.
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type Blockchain: blockchain::Backend;
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/// Associated state backend type.
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type State: state_machine::backend::Backend;
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/// Begin a new block insertion transaction with given parent block id.
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fn begin_transaction(&self, block: BlockId) -> error::Result<Self::BlockImportOperation>;
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/// Commit block insertion.
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fn commit_transaction(&self, transaction: Self::BlockImportOperation) -> error::Result<()>;
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/// Returns reference to blockchain backend.
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fn blockchain(&self) -> &Self::Blockchain;
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/// Returns state backend for specified block.
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fn state_at(&self, block: BlockId) -> error::Result<Self::State>;
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}
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@@ -1,85 +0,0 @@
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// Copyright 2017 Parity Technologies (UK) Ltd.
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// This file is part of Polkadot.
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// Polkadot 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.
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||||
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||||
// Polkadot is distributed in the hope that it will be useful,
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||||
// 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.
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||||
|
||||
// You should have received a copy of the GNU General Public License
|
||||
// along with Polkadot. If not, see <http://www.gnu.org/licenses/>.
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//! Polkadot blockchain trait
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use std::fmt::{Display, Formatter, Error as FmtError};
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use primitives::block;
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use error::Result;
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/// Block indentification.
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#[derive(Debug, Clone, Copy)]
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pub enum BlockId {
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/// Identify by block header hash.
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Hash(block::HeaderHash),
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/// Identify by block number.
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Number(block::Number),
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}
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impl Display for BlockId {
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fn fmt(&self, f: &mut Formatter) -> ::std::result::Result<(), FmtError> {
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match *self {
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BlockId::Hash(h) => h.fmt(f),
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BlockId::Number(n) => n.fmt(f),
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}
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}
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}
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/// Blockchain database backend. Does not perform any validation.
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pub trait Backend: Send + Sync {
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/// Get block header. Returns `None` if block is not found.
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fn header(&self, id: BlockId) -> Result<Option<block::Header>>;
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/// Get block body. Returns `None` if block is not found.
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fn body(&self, id: BlockId) -> Result<Option<block::Body>>;
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/// Get blockchain info.
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fn info(&self) -> Result<Info>;
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/// Get block status.
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fn status(&self, id: BlockId) -> Result<BlockStatus>;
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/// Get block hash by number. Returns `None` if the header is not in the chain.
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fn hash(&self, number: block::Number) -> Result<Option<block::HeaderHash>>;
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}
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/// Block import outcome
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pub enum ImportResult<E> {
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/// Imported successfully.
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Imported,
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/// Block already exists, skippped.
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AlreadyInChain,
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/// Unknown parent.
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UnknownParent,
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/// Other errror.
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Err(E),
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}
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/// Blockchain info
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#[derive(Debug)]
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pub struct Info {
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/// Best block hash.
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pub best_hash: block::HeaderHash,
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/// Best block number.
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pub best_number: block::Number,
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/// Genesis block hash.
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pub genesis_hash: block::HeaderHash,
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}
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/// Block status.
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#[derive(Debug, PartialEq, Eq)]
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pub enum BlockStatus {
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/// Already in the blockchain.
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InChain,
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/// Not in the queue or the blockchain.
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Unknown,
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}
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@@ -1,69 +0,0 @@
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// Copyright 2017 Parity Technologies (UK) Ltd.
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// This file is part of Polkadot.
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||||
|
||||
// Polkadot 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.
|
||||
|
||||
// Polkadot 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 Polkadot. If not, see <http://www.gnu.org/licenses/>.
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//! Polkadot client possible errors.
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use std;
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use state_machine;
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use blockchain;
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error_chain! {
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errors {
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/// Backend error.
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Backend {
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description("Unrecoverable backend error"),
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display("Backend error"),
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}
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/// Unknown block.
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UnknownBlock(h: blockchain::BlockId) {
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description("unknown block"),
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display("UnknownBlock: {}", h),
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}
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/// Execution error.
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Execution(e: Box<state_machine::Error>) {
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description("execution error"),
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display("Execution: {}", e),
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}
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/// Blockchain error.
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Blockchain(e: Box<std::error::Error + Send>) {
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description("Blockchain error"),
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display("Blockchain: {}", e),
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}
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}
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}
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// TODO [ToDr] Temporary, state_machine::Error should be a regular error not Box.
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impl From<Box<state_machine::Error>> for Error {
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fn from(e: Box<state_machine::Error>) -> Self {
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ErrorKind::Execution(e).into()
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}
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}
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impl From<state_machine::backend::Void> for Error {
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fn from(_e: state_machine::backend::Void) -> Self {
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unreachable!()
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}
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}
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impl Error {
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/// Chain a blockchain error.
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pub fn from_blockchain(e: Box<std::error::Error + Send>) -> Self {
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ErrorKind::Blockchain(e).into()
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}
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}
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@@ -1,208 +0,0 @@
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// Copyright 2017 Parity Technologies (UK) Ltd.
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||||
// This file is part of Polkadot.
|
||||
|
||||
// Polkadot 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.
|
||||
|
||||
// Polkadot 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 Polkadot. If not, see <http://www.gnu.org/licenses/>.
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//! In memory client backend
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use std::collections::HashMap;
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use parking_lot::RwLock;
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use state_machine;
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use error;
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use backend;
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use primitives;
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use ser;
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use primitives::block::{self, HeaderHash};
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use blockchain::{self, BlockId, BlockStatus};
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fn header_hash(header: &block::Header) -> block::HeaderHash {
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primitives::hashing::blake2_256(&ser::to_vec(header)).into()
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}
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struct PendingBlock {
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block: Block,
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is_best: bool,
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}
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struct Block {
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header: block::Header,
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body: Option<block::Body>,
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}
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/// In-memory transaction.
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pub struct BlockImportOperation {
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pending_block: Option<PendingBlock>,
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pending_state: state_machine::backend::InMemory,
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}
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struct BlockchainStorage {
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blocks: HashMap<HeaderHash, Block>,
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hashes: HashMap<block::Number, HeaderHash>,
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best_hash: HeaderHash,
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best_number: block::Number,
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genesis_hash: HeaderHash,
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}
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/// In-memory blockchain. Supports concurrent reads.
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pub struct Blockchain {
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storage: RwLock<BlockchainStorage>,
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}
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impl Blockchain {
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fn id(&self, id: BlockId) -> Option<HeaderHash> {
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match id {
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BlockId::Hash(h) => Some(h),
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BlockId::Number(n) => self.storage.read().hashes.get(&n).cloned(),
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}
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}
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fn new() -> Blockchain {
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Blockchain {
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storage: RwLock::new(
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BlockchainStorage {
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blocks: HashMap::new(),
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hashes: HashMap::new(),
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best_hash: HeaderHash::default(),
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best_number: 0,
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genesis_hash: HeaderHash::default(),
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})
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}
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}
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fn insert(&self, hash: HeaderHash, header: block::Header, body: Option<block::Body>, is_new_best: bool) {
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let number = header.number;
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let mut storage = self.storage.write();
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storage.blocks.insert(hash, Block {
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header: header,
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body: body,
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});
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storage.hashes.insert(number, hash);
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if is_new_best {
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storage.best_hash = hash;
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storage.best_number = number;
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}
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if number == 0 {
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storage.genesis_hash = hash;
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}
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}
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}
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impl blockchain::Backend for Blockchain {
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fn header(&self, id: BlockId) -> error::Result<Option<block::Header>> {
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Ok(self.id(id).and_then(|hash| self.storage.read().blocks.get(&hash).map(|b| b.header.clone())))
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}
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fn body(&self, id: BlockId) -> error::Result<Option<block::Body>> {
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Ok(self.id(id).and_then(|hash| self.storage.read().blocks.get(&hash).and_then(|b| b.body.clone())))
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}
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fn info(&self) -> error::Result<blockchain::Info> {
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let storage = self.storage.read();
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Ok(blockchain::Info {
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best_hash: storage.best_hash,
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best_number: storage.best_number,
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genesis_hash: storage.genesis_hash,
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})
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}
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fn status(&self, id: BlockId) -> error::Result<BlockStatus> {
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match self.id(id).map_or(false, |hash| self.storage.read().blocks.contains_key(&hash)) {
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true => Ok(BlockStatus::InChain),
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false => Ok(BlockStatus::Unknown),
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}
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}
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fn hash(&self, number: block::Number) -> error::Result<Option<block::HeaderHash>> {
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Ok(self.id(BlockId::Number(number)))
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}
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}
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impl backend::BlockImportOperation for BlockImportOperation {
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type State = state_machine::backend::InMemory;
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fn state(&self) -> error::Result<Self::State> {
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Ok(self.pending_state.clone())
|
||||
}
|
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|
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fn import_block(&mut self, header: block::Header, body: Option<block::Body>, is_new_best: bool) -> error::Result<()> {
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assert!(self.pending_block.is_none(), "Only one block per transaction is allowed");
|
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self.pending_block = Some(PendingBlock {
|
||||
block: Block {
|
||||
header: header,
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body: body,
|
||||
},
|
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is_best: is_new_best,
|
||||
});
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Ok(())
|
||||
}
|
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|
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fn reset_storage<I: Iterator<Item=(Vec<u8>, Vec<u8>)>>(&mut self, iter: I) -> error::Result<()> {
|
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self.pending_state = state_machine::backend::InMemory::from(iter.collect());
|
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Ok(())
|
||||
}
|
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}
|
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|
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/// In-memory backend. Keeps all states and blocks in memory. Useful for testing.
|
||||
pub struct Backend {
|
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states: RwLock<HashMap<block::HeaderHash, state_machine::backend::InMemory>>,
|
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blockchain: Blockchain,
|
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}
|
||||
|
||||
impl Backend {
|
||||
/// Create a new instance of in-mem backend.
|
||||
pub fn new() -> Backend {
|
||||
Backend {
|
||||
states: RwLock::new(HashMap::new()),
|
||||
blockchain: Blockchain::new(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl backend::Backend for Backend {
|
||||
type BlockImportOperation = BlockImportOperation;
|
||||
type Blockchain = Blockchain;
|
||||
type State = state_machine::backend::InMemory;
|
||||
|
||||
fn begin_transaction(&self, block: BlockId) -> error::Result<Self::BlockImportOperation> {
|
||||
let state = match block {
|
||||
BlockId::Hash(h) if h.is_zero() => Self::State::default(),
|
||||
_ => self.state_at(block)?,
|
||||
};
|
||||
|
||||
Ok(BlockImportOperation {
|
||||
pending_block: None,
|
||||
pending_state: state,
|
||||
})
|
||||
}
|
||||
|
||||
fn commit_transaction(&self, transaction: Self::BlockImportOperation) -> error::Result<()> {
|
||||
if let Some(pending_block) = transaction.pending_block {
|
||||
let hash = header_hash(&pending_block.block.header);
|
||||
self.states.write().insert(hash, transaction.pending_state);
|
||||
self.blockchain.insert(hash, pending_block.block.header, pending_block.block.body, pending_block.is_best);
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn blockchain(&self) -> &Blockchain {
|
||||
&self.blockchain
|
||||
}
|
||||
|
||||
fn state_at(&self, block: BlockId) -> error::Result<Self::State> {
|
||||
match self.blockchain.id(block).and_then(|id| self.states.read().get(&id).cloned()) {
|
||||
Some(state) => Ok(state),
|
||||
None => Err(error::ErrorKind::UnknownBlock(block).into()),
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -1,217 +0,0 @@
|
||||
// Copyright 2017 Parity Technologies (UK) Ltd.
|
||||
// This file is part of Polkadot.
|
||||
|
||||
// Polkadot 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.
|
||||
|
||||
// Polkadot 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 Polkadot. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
//! Polkadot Client
|
||||
|
||||
#![warn(missing_docs)]
|
||||
|
||||
extern crate substrate_primitives as primitives;
|
||||
extern crate substrate_state_machine as state_machine;
|
||||
extern crate substrate_serializer as ser;
|
||||
extern crate substrate_codec as codec;
|
||||
extern crate substrate_executor;
|
||||
extern crate ed25519;
|
||||
|
||||
extern crate triehash;
|
||||
extern crate parking_lot;
|
||||
#[macro_use] extern crate error_chain;
|
||||
#[macro_use] extern crate log;
|
||||
|
||||
pub mod error;
|
||||
pub mod blockchain;
|
||||
pub mod backend;
|
||||
pub mod in_mem;
|
||||
|
||||
pub use blockchain::Info as ChainInfo;
|
||||
pub use blockchain::BlockId;
|
||||
|
||||
use primitives::block;
|
||||
use primitives::storage::{StorageKey, StorageData};
|
||||
|
||||
use blockchain::Backend as BlockchainBackend;
|
||||
use backend::BlockImportOperation;
|
||||
use state_machine::backend::Backend as StateBackend;
|
||||
|
||||
/// Polkadot Client
|
||||
#[derive(Debug)]
|
||||
pub struct Client<B, E> where B: backend::Backend {
|
||||
backend: B,
|
||||
executor: E,
|
||||
}
|
||||
|
||||
/// Client info
|
||||
#[derive(Debug)]
|
||||
pub struct ClientInfo {
|
||||
/// Best block hash.
|
||||
pub chain: ChainInfo,
|
||||
/// Best block number in the queue.
|
||||
pub best_queued_number: Option<block::Number>,
|
||||
/// Best queued block hash.
|
||||
pub best_queued_hash: Option<block::HeaderHash>,
|
||||
}
|
||||
|
||||
/// Information regarding the result of a call.
|
||||
pub struct CallResult {
|
||||
/// The data that was returned from the call.
|
||||
pub return_data: Vec<u8>,
|
||||
/// The changes made to the state by the call.
|
||||
pub changes: state_machine::OverlayedChanges,
|
||||
}
|
||||
|
||||
/// Block import result.
|
||||
#[derive(Debug)]
|
||||
pub enum ImportResult {
|
||||
/// Added to the import queue.
|
||||
Queued,
|
||||
/// Already in the import queue.
|
||||
AlreadyQueued,
|
||||
/// Already in the blockchain.
|
||||
AlreadyInChain,
|
||||
/// Block or parent is known to be bad.
|
||||
KnownBad,
|
||||
/// Block parent is not in the chain.
|
||||
UnknownParent,
|
||||
}
|
||||
|
||||
/// Block status.
|
||||
#[derive(Debug, PartialEq, Eq)]
|
||||
pub enum BlockStatus {
|
||||
/// Added to the import queue.
|
||||
Queued,
|
||||
/// Already in the blockchain.
|
||||
InChain,
|
||||
/// Block or parent is known to be bad.
|
||||
KnownBad,
|
||||
/// Not in the queue or the blockchain.
|
||||
Unknown,
|
||||
}
|
||||
|
||||
/// Create an instance of in-memory client.
|
||||
pub fn new_in_mem<E, F>(
|
||||
executor: E,
|
||||
build_genesis: F
|
||||
) -> error::Result<Client<in_mem::Backend, E>>
|
||||
where
|
||||
E: state_machine::CodeExecutor,
|
||||
F: FnOnce() -> (block::Header, Vec<(Vec<u8>, Vec<u8>)>)
|
||||
{
|
||||
Client::new(in_mem::Backend::new(), executor, build_genesis)
|
||||
}
|
||||
|
||||
impl<B, E> Client<B, E> where
|
||||
B: backend::Backend,
|
||||
E: state_machine::CodeExecutor,
|
||||
error::Error: From<<<B as backend::Backend>::State as state_machine::backend::Backend>::Error>,
|
||||
{
|
||||
/// Creates new Polkadot Client with given blockchain and code executor.
|
||||
pub fn new<F>(
|
||||
backend: B,
|
||||
executor: E,
|
||||
build_genesis: F
|
||||
) -> error::Result<Self>
|
||||
where
|
||||
F: FnOnce() -> (block::Header, Vec<(Vec<u8>, Vec<u8>)>)
|
||||
{
|
||||
if backend.blockchain().header(BlockId::Number(0))?.is_none() {
|
||||
trace!("Empty database, writing genesis block");
|
||||
let (genesis_header, genesis_store) = build_genesis();
|
||||
let mut tx = backend.begin_transaction(BlockId::Hash(block::HeaderHash::default()))?;
|
||||
tx.reset_storage(genesis_store.into_iter())?;
|
||||
tx.import_block(genesis_header, None, true)?;
|
||||
backend.commit_transaction(tx)?;
|
||||
}
|
||||
Ok(Client {
|
||||
backend,
|
||||
executor,
|
||||
})
|
||||
}
|
||||
|
||||
fn state_at(&self, hash: &block::HeaderHash) -> error::Result<B::State> {
|
||||
self.backend.state_at(BlockId::Hash(*hash))
|
||||
}
|
||||
|
||||
/// Return single storage entry of contract under given address in state in a block of given hash.
|
||||
pub fn storage(&self, hash: &block::HeaderHash, key: &StorageKey) -> error::Result<StorageData> {
|
||||
Ok(self.state_at(hash)?
|
||||
.storage(&key.0)
|
||||
.map(|x| StorageData(x.to_vec()))?)
|
||||
}
|
||||
|
||||
/// Execute a call to a contract on top of state in a block of given hash.
|
||||
///
|
||||
/// No changes are made.
|
||||
pub fn call(&self, hash: &block::HeaderHash, method: &str, call_data: &[u8]) -> error::Result<CallResult> {
|
||||
let state = self.state_at(hash)?;
|
||||
let mut changes = state_machine::OverlayedChanges::default();
|
||||
|
||||
let _ = state_machine::execute(
|
||||
&state,
|
||||
&mut changes,
|
||||
&self.executor,
|
||||
method,
|
||||
call_data,
|
||||
)?;
|
||||
Ok(CallResult { return_data: vec![], changes })
|
||||
}
|
||||
|
||||
/// Queue a block for import.
|
||||
pub fn import_block(&self, header: block::Header, body: Option<block::Body>) -> error::Result<ImportResult> {
|
||||
// TODO: import lock
|
||||
// TODO: validate block
|
||||
match self.backend.blockchain().status(BlockId::Hash(header.parent_hash))? {
|
||||
blockchain::BlockStatus::InChain => (),
|
||||
blockchain::BlockStatus::Unknown => return Ok(ImportResult::UnknownParent),
|
||||
}
|
||||
|
||||
let mut transaction = self.backend.begin_transaction(BlockId::Number(header.number))?;
|
||||
let mut _state = transaction.state()?;
|
||||
// TODO: execute block on _state
|
||||
|
||||
let is_new_best = header.number == self.backend.blockchain().info()?.best_number + 1;
|
||||
transaction.import_block(header, body, is_new_best)?;
|
||||
self.backend.commit_transaction(transaction)?;
|
||||
Ok(ImportResult::Queued)
|
||||
}
|
||||
|
||||
/// Get blockchain info.
|
||||
pub fn info(&self) -> error::Result<ClientInfo> {
|
||||
let info = self.backend.blockchain().info().map_err(|e| error::Error::from_blockchain(Box::new(e)))?;
|
||||
Ok(ClientInfo {
|
||||
chain: info,
|
||||
best_queued_hash: None,
|
||||
best_queued_number: None,
|
||||
})
|
||||
}
|
||||
|
||||
/// Get block status.
|
||||
pub fn block_status(&self, hash: &block::HeaderHash) -> error::Result<BlockStatus> {
|
||||
// TODO: more efficient implementation
|
||||
match self.backend.blockchain().header(BlockId::Hash(*hash)).map_err(|e| error::Error::from_blockchain(Box::new(e)))?.is_some() {
|
||||
true => Ok(BlockStatus::InChain),
|
||||
false => Ok(BlockStatus::Unknown),
|
||||
}
|
||||
}
|
||||
|
||||
/// Get block hash by number.
|
||||
pub fn block_hash(&self, block_number: block::Number) -> error::Result<Option<block::HeaderHash>> {
|
||||
self.backend.blockchain().hash(block_number)
|
||||
}
|
||||
|
||||
/// Get block header by hash.
|
||||
pub fn header(&self, hash: &block::HeaderHash) -> error::Result<Option<block::Header>> {
|
||||
self.backend.blockchain().header(BlockId::Hash(*hash))
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user