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Implement PIP messages, request builder, and handlers (#4945)

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* return errors on database corruption

* fix tests, json tests

* fix remainder of build

* buffer flow -> request credits

* proving state backend

* generate transaction proofs from provider

* network messages for transaction proof

* transaction proof test

* test for transaction proof message

* fix call bug

* request transaction proofs from on_demand

* most of proved_execution rpc

* proved execution future

* initial request definitions

* RLP encoding and decoding for requests

* proofs of non-existance in ProvingBlockChainClient

* new requests in provider.

* encode and decode responses

* complete initial request changes

* handle request packet in LightProtocol

* handle response packets

* implement requesting from

* re-do cost table

* get tests compiling

* fix cost table RLP encoding

* roundtrip tests for request types

* request builder tests

* move request_builder -> request::builder

* get network tests working

* return only complete headers responses

* request builder improvements

* New version of jsonrpc.

* split request filling into fill,complete

* Better invalid encoding messages

* Fixing deprecated methods of tokio_core

* use PIP messages in on_demand, old API

* migrate oneshot::complete to send in on_demand

* get on_demand tests to compile

* port ethsync to PIP messages

* adjust to minor on_demand API changes in RPC

* Using dedicated branch for jsonrpc

* Bump
This commit is contained in:
Robert Habermeier
2017-03-23 13:17:05 +01:00
committed by Gav Wood
parent b931a225ba
commit 64cec5ff7d
28 changed files with 2800 additions and 2095 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
sync/src/light_sync/sync_round.rs
View File

@@ -20,13 +20,14 @@ use std::cmp::Ordering;
use std::collections::{BinaryHeap, HashMap, HashSet, VecDeque};
use std::fmt;
use ethcore::encoded;
use ethcore::header::Header;
use light::net::ReqId;
use light::request::Headers as HeadersRequest;
use light::request::CompleteHeadersRequest as HeadersRequest;
use network::PeerId;
use util::{Bytes, H256};
use util::H256;
use super::response;
@@ -40,7 +41,7 @@ pub trait ResponseContext {
/// Get the request ID this response corresponds to.
fn req_id(&self) -> &ReqId;
/// Get the (unverified) response data.
fn data(&self) -> &[Bytes];
fn data(&self) -> &[encoded::Header];
/// Punish the responder.
fn punish_responder(&self);
}
@@ -114,7 +115,7 @@ impl Fetcher {
let needed_headers = HeadersRequest {
start: high_rung.parent_hash().clone().into(),
max: diff as usize - 1,
max: diff - 1,
skip: 0,
reverse: true,
};
@@ -190,7 +191,7 @@ impl Fetcher {
return SyncRound::Fetch(self);
}
match response::decode_and_verify(headers, &request.headers_request) {
match response::verify(headers, &request.headers_request) {
Err(e) => {
trace!(target: "sync", "Punishing peer {} for invalid response ({})", ctx.responder(), e);
ctx.punish_responder();
@@ -286,21 +287,21 @@ impl Fetcher {
}
// Compute scaffold parameters from non-zero distance between start and target block: (skip, pivots).
fn scaffold_params(diff: u64) -> (u64, usize) {
fn scaffold_params(diff: u64) -> (u64, u64) {
// default parameters.
// amount of blocks between each scaffold pivot.
const ROUND_SKIP: u64 = 255;
// amount of scaffold pivots: these are the Xs in "X___X___X"
const ROUND_PIVOTS: usize = 256;
const ROUND_PIVOTS: u64 = 256;
let rem = diff % (ROUND_SKIP + 1);
if diff <= ROUND_SKIP {
// just request headers from the start to the target.
(0, rem as usize)
(0, rem)
} else {
// the number of pivots necessary to exactly hit or overshoot the target.
let pivots_to_target = (diff / (ROUND_SKIP + 1)) + if rem == 0 { 0 } else { 1 };
let num_pivots = ::std::cmp::min(pivots_to_target, ROUND_PIVOTS as u64) as usize;
let num_pivots = ::std::cmp::min(pivots_to_target, ROUND_PIVOTS);
(ROUND_SKIP, num_pivots)
}
}
@@ -319,7 +320,7 @@ pub struct RoundStart {
contributors: HashSet<PeerId>,
attempt: usize,
skip: u64,
pivots: usize,
pivots: u64,
}
impl RoundStart {
@@ -372,7 +373,7 @@ impl RoundStart {
}
};
match response::decode_and_verify(ctx.data(), &req) {
match response::verify(ctx.data(), &req) {
Ok(headers) => {
if self.sparse_headers.len() == 0
&& headers.get(0).map_or(false, |x| x.parent_hash() != &self.start_block.1) {
@@ -383,7 +384,7 @@ impl RoundStart {
self.contributors.insert(ctx.responder());
self.sparse_headers.extend(headers);
if self.sparse_headers.len() == self.pivots {
if self.sparse_headers.len() as u64 == self.pivots {
return if self.skip == 0 {
SyncRound::abort(AbortReason::TargetReached, self.sparse_headers.into())
} else {
@@ -429,7 +430,7 @@ impl RoundStart {
let start = (self.start_block.0 + 1)
+ self.sparse_headers.len() as u64 * (self.skip + 1);
let max = self.pivots - self.sparse_headers.len();
let max = self.pivots - self.sparse_headers.len() as u64;
let headers_request = HeadersRequest {
start: start.into(),