dcrstakepool

dcrstakepool

dcrstakepool is a minimalist web application which provides a method for allowing users to purchase tickets and have a pool of wallet servers redeem and vote on the user's behalf.

Version History

• 0.0.3 - More expected/basic web application functionality added.
  • SMTPHost now defaults to an empty string so a stake pool can be used for development or testing purposes without a configured mail server. The contents of the emails are sent through the logger so links can still be followed.
  • Upon sign up, users now have an email sent with a validation link. They will not be able to sign in until they verify.
  • New settings page that allows users to change their email address/password.
  • Bug fix to HeightRegistered migration for users who signed up but never submitted an address would not be able to login.
• 0.0.2 - Minor improvements/feature addition
  • The importscript RPC is now called with the current block height at the time of user registration. Previously, importscript triggered a rescan for transactions from the genesis block. Since the user just registered, there won't be any transactions present. A new HeightRegistered column is automatically added to the Users table. A default value of 15346 is used for existing users who already had a multisigscript generated. This can be adjusted to a more reasonable value for you pool by running the following MySQL query: UPDATE Users SET HeightRegistered = NEWVALUE WHERE HeightRegistered = 15346;
  • Users may now reset their password by specifying an email address and clicking a link that they will receive via email. You will need to add a proper configuration for your mail server for it to work properly. The various SMTP options can be seen in sample-dcrstakepool.conf.
  • User instructions on the address and ticket pages were updated.
  • SpentBy link added to the voted tickets display.
• 0.0.1 - Initial release for mainnet operations

Requirements

• Go 1.6.3 or newer.
• MySQL
• Nginx or other web server to proxy to dcrstakepool

Installation

Linux/BSD/MacOSX/POSIX - Build from Source

Building or updating from source requires the following build dependencies:

• Go 1.6 or 1.7

  Installation instructions can be found here: http://golang.org/doc/install. It is recommended to add $GOPATH/bin to your PATH at this point.

• Glide

  Glide is used to manage project dependencies and provide reproducible builds. To install:

  go get -u github.com/Masterminds/glide

Unfortunately, the use of glide prevents a handy tool such as go get from automatically downloading, building, and installing the source in a single command. Instead, the latest project and dependency sources must be first obtained manually with git and glide, and then go is used to build and install the project.

• Run the following command to obtain the dcrstakepool code and all dependencies:

$ git clone https://github.com/decred/dcrstakepool $GOPATH/src/github.com/decred/dcrstakepool
$ cd $GOPATH/src/github.com/decred/dcrstakepool
$ glide install

• Assuming you have done the below configuration, build and run dcrstakepool:

$ cd $GOPATH/src/github.com/decred/dcrstakepool
$ go build

Updating

To update an existing source tree, pull the latest changes and install the matching dependencies:

$ cd $GOPATH/src/github.com/decred/dcrstakepool
$ git pull
$ glide install
$ go build

Setup

Pre-requisites

These instructions assume you are familiar with dcrd/dcrwallet.

• Create basic dcrd/dcrwallet/dcrctl config files with usernames, passwords, rpclisten, and network set appropriately within them or run example commands with additional flags as necessary

• Build/install dcrd and dcrwallet from latest master

• Run dcrd instances and let them fully sync

Stake pool fees/cold wallet

• Setup a new wallet for receiving payment for stake pool fees. This should be completely separate from the stake pool infrastructure.

$ dcrwallet --create
$ dcrwallet

• Get the master pubkey for the account you wish to use. This will be needed to configure dcrwallet and dcrstakepool.

$ dcrctl --wallet createnewaccount teststakepoolfees
$ dcrctl --wallet getmasterpubkey teststakepoolfees

• Mark 10000 addresses in use for the account so the wallet will recognize transactions to those addresses. Fees from UserId 1 will go to address 1, UserId 2 to address 2, and so on.

$ dcrctl --wallet accountsyncaddressindex teststakepoolfees 0 10000

Stake pool voting wallets

• Create the wallets. All wallets should have the same seed. Backup the seed for disaster recovery!

$ dcrwallet --create

• Start a properly configured dcrwallet and unlock it. See sample-dcrwallet.conf.

$ dcrwallet

MySQL

• Install, configure, and start MySQL

• Add stakepool user and create the stakepool database

$ mysql -uroot -ppassword

MySQL> CREATE USER 'stakepool'@'localhost' IDENTIFIED BY 'password';
MySQL> GRANT ALL PRIVILEGES ON *.* TO 'stakepool'@'localhost' WITH GRANT OPTION;
MySQL> FLUSH PRIVILEGES;
MySQL> CREATE DATABASE stakepool;

Nginx/web server

• Adapt sample-nginx.conf or setup a different web server in a proxy configuration

dcrstakepool

• Create the .dcrstakepool directory and copy dcrwallet certs to it

$ mkdir ~/.dcrstakepool
$ cd ~/.dcrstakepool
$ scp walletserver1:~/.dcrwallet/rpc.cert wallet1.cert
$ scp walletserver2:~/.dcrwallet/rpc.cert wallet2.cert
$ scp walletserver3:~/.dcrwallet/rpc.cert wallet3.cert

• Copy old-style sample config and edit appropriately

$ cp -p config.toml.sample config.toml

• Copy new-style sample config and edit appropriately

$ cp -p sample-dcrstakepool.conf dcrstakepool.conf

Running

The easiest way to run the stakepool code is to run it directly from the root of the source tree:

$ cd $GOPATH/src/github.com/decred/dcrstakepool
$ go build
$ ./dcrstakepool

If you wish to run dcrstakepool from a different directory you will need to:

• Copy config.toml to the same directory you will be running dcrstakepool from
• Either copy public and views to the same directory or specify absolute paths in config.toml

Operations

• dcrstakepool will connect to the database or error out if it cannot do so

• dcrstakepool will create the stakepool.Users table automatically if it doesn't exist

• dcrstakepool attempts to connect to all of the wallet servers on startup or error out if it cannot do so

• dcrstakepool takes a user's pubkey, validates it, calls getnewaddress on all the wallet servers, then createmultisig, and finally importscript. If any of these RPCs fail or returns inconsistent results, the RPC client built-in to dcrstakepool will shut down and will not operate until it has been restarted. Wallets should be verified to be in sync before restarting.

Backups, monitoring, security considerations

• MySQL should be backed up often and regularly (probably at least hourly). Backups should be transferred off-site. If using binary backups, do a test restore. For .sql files, verify visually.

• A monitoring system with alerting should be pointed at dcrstakepool and tested/verified to be operating properly. There is a hidden /status page which throws 500 if the RPC client is shutdown. If your monitoring system supports it, add additional points of verification such as: checking that the /stats page loads and has expected information in it, create a test account and setup automated login testing, etc.

• Wallets should never be used for anything else (they should always have a balance of 0)

Disaster Recovery

Always keep at least one wallet voting while performing maintenance / restoration!

• In the case of a total failure of a wallet server:
  • Restore the failed wallet(s) from seed
  • getnewaddress until it matches the index of the other wallets
  • Import scripts for all users

for s in `mysql -ustakepool -ppassword -Dstakepool -se 'SELECT Multisigscript FROM Users WHERE LENGTH(Multisigscript) != 0'`;
do dcrctl --wallet importscript "$s";
done

• If servers get desynced but are otherwise running okay, call getnewaddress/listscripts/importscript until they're re-synced. See doc.go for some example shell commands.

IRC

• irc.freenode.net
• channel #decred

Issue Tracker

The integrated github issue tracker is used for this project.

License

dcrstakepool is licensed under the copyfree ISC License.