54203d7db0
This commit refactors the entire websocket client code to resolve several issues with the previous implementation. Note that this commit does not change the public API for websockets. It only consists of internal improvements. The following is the major issues which have been addressed: - A slow websocket client could impede notifications to all clients - Long-running operations such as rescans would block all other requests until it had completed - The above two points taken together could lead to apparant hangs since the client doing the rescan would eventually run out of channel buffer and block the entire group of clients until the rescan completed - Disconnecting a websocket during certain operations could lead to a hang - Stopping the rpc server with operations under way could lead to a hang - There were no limits to the number of websocket clients that could connect The following is a summary of the major changes: - The websocket code has been split into two entities: a connection/notification manager and a websocket client - The new connection/notification manager acts as the entry point from the rest of the subsystems to feed data which potentially needs to notify clients - Each websocket client now has its own instance of the new websocket client type which controls its own lifecycle - The data flow has been completely redesigned to closely resemble the peer data flow - Each websocket now has its own long-lived goroutines for input, output, and queuing of notifications - Notifications use the new notification queue goroutine along with queueing to ensure they dont't block on stalled or slow peers - There is a new infrastructure for asynchronously executing long-running commands such as a rescan while still allowing the faster operations to continue to be serviced by the same client - Since long-running operations now run asynchronously, they have been limited to one at a time - Added a limit of 10 websocket clients. This is hard coded for now, but will be made configurable in the future Taken together these changes make the code far easier to reason about and update as well solve the aforementioned issues. Further optimizations to improve performance are possible in regards to the way the connection/notification manager works, however this commit already contains a ton of changes, so they are being left for another time. |
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|---|---|---|
| limits | ||
| release | ||
| util | ||
| .gitignore | ||
| .travis.yml | ||
| addrmanager.go | ||
| addrmanager_test.go | ||
| blockmanager.go | ||
| btcd.go | ||
| CHANGES | ||
| config.go | ||
| deps.txt | ||
| discovery.go | ||
| doc.go | ||
| LICENSE | ||
| log.go | ||
| mempool.go | ||
| mruinvmap.go | ||
| mruinvmap_test.go | ||
| params.go | ||
| peer.go | ||
| README.md | ||
| rpcserver.go | ||
| rpcwebsocket.go | ||
| sample-btcd.conf | ||
| server.go | ||
| service_windows.go | ||
| signal.go | ||
| upgrade.go | ||
| upnp.go | ||
| version.go | ||
btcd
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(https://travis-ci.org/conformal/btcd)
btcd is an alternative full node bitcoin implementation written in Go (golang).
This project is currently under active development and is in an Alpha state.
It currently properly downloads, validates, and serves the block chain using the exact rules (including bugs) for block acceptance as the reference implementation (bitcoind). We have taken great care to avoid btcd causing a fork to the block chain. It passes all of the 'official' block acceptance tests (https://github.com/TheBlueMatt/test-scripts).
It also properly relays newly mined blocks, maintains a transaction pool, and relays individual transactions that have not yet made it into a block. It ensures all individual transactions admitted to the pool follow the rules required into the block chain and also includes the vast majority of the more strict checks which filter transactions based on miner requirements ("standard" transactions).
One key difference between btcd and bitcoind is that btcd does NOT include wallet functionality and this was a very intentional design decision. See the blog entry here for more details. This means you can't actually make or receive payments directly with btcd. That functionality is provided by the btcwallet and btcgui projects which are both under active development.
Requirements
Go 1.2 or newer.
Installation
Windows - MSI Available
https://github.com/conformal/btcd/releases
Linux/BSD/POSIX - Build from Source
-
Install Go according to the installation instructions here: http://golang.org/doc/install
-
Run the following command to obtain btcd, all dependencies, and install it:
$ go get github.com/conformal/btcd -
btcd will now be installed in either
$GOROOT/binor$GOPATH/bindepending on your configuration. If you did not already add to your system path during the installation, we recommend you do so now.
Updating
Windows
Install a newer MSI
Linux/BSD/POSIX - Build from Source
- Run the following command to update btcd, all dependencies, and install it:
$ go get -u -v github.com/conformal/btcd/...
Getting Started
btcd has several configuration options avilable to tweak how it runs, but all of the basic operations described in the intro section work with zero configuration.
Windows (Installed from MSI)
Launch btcd from your Start menu.
Linux/BSD/POSIX/Source
$ ./btcd
Mailing lists
- btcd: discussion of btcd and its packages.
- btcd-commits: readonly mail-out of source code changes.
To subscribe to a given list, send email to list+subscribe@opensource.conformal.com
Issue Tracker
The integrated github issue tracker is used for this project.
Documentation
The documentation is a work-in-progress. It uses the github wiki facility.
GPG Verification Key
All official release tags are signed by Conformal so users can ensure the code has not been tampered with and is coming from Conformal. To verify the signature perform the following:
-
Download the public key from the Conformal website at https://opensource.conformal.com/GIT-GPG-KEY-conformal.txt
-
Import the public key into your GPG keyring:
gpg --import GIT-GPG-KEY-conformal.txt -
Verify the release tag with the following command where
TAG_NAMEis a placeholder for the specific tag:git tag -v TAG_NAME
License
btcd is licensed under the copyfree ISC License.