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README.md

Table of Contents

  1. About
  2. Getting Started
    1. Installation
      1. Windows
      2. Linux/BSD/MacOSX/POSIX
    2. Configuration
    3. Controlling and Querying dcrd via dcrctl
    4. Mining
  3. Help
    1. Startup
      1. Using bootstrap.dat
    2. Network Configuration
    3. Wallet
  4. Contact
    1. IRC
    2. Mailing Lists
  5. Developer Resources
    1. Code Contribution Guidelines
    2. JSON-RPC Reference
    3. The Decred-related Go Packages

1. About

dcrd is a full node Decred implementation written in Go, licensed under the copyfree ISC License.

This project is currently under active development and is in a Beta state. It is extremely stable and has been in production use since February 2016.

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).

2. Getting Started

2.1 Installation

The first step is to install dcrd. See one of the following sections for details on how to install on the supported operating systems.

2.1.1 Windows Installation

2.1.2 Linux/BSD/MacOSX/POSIX Installation

  • Install Go according to the installation instructions here: http://golang.org/doc/install
  • Run the following command to ensure your Go version is at least version 1.2: $ go version
  • Run the following command to obtain dcrd, its dependencies, and install it: $ go get github.com/decred/dcrd/...
    • To upgrade, run the following command: $ go get -u github.com/decred/dcrd/...
  • Run dcrd: $ dcrd

2.2 Configuration

dcrd has a number of configuration options, which can be viewed by running: $ dcrd --help.

2.3 Controlling and Querying dcrd via dcrctl

dcrctl is a command line utility that can be used to both control and query dcrd via RPC. dcrd does not enable its RPC server by default; You must configure at minimum both an RPC username and password or both an RPC limited username and password:

  • dcrd.conf configuration file
[Application Options]
rpcuser=myuser
rpcpass=SomeDecentp4ssw0rd
rpclimituser=mylimituser
rpclimitpass=Limitedp4ssw0rd
  • dcrctl.conf configuration file
[Application Options]
rpcuser=myuser
rpcpass=SomeDecentp4ssw0rd

OR

[Application Options]
rpclimituser=mylimituser
rpclimitpass=Limitedp4ssw0rd

For a list of available options, run: $ dcrctl --help

2.4 Mining
dcrd supports both the getwork and getblocktemplate RPCs although the getwork RPC is deprecated and will likely be removed in a future release. The limited user cannot access these RPCs.

1. Add the payment addresses with the miningaddr option.

[Application Options]
rpcuser=myuser
rpcpass=SomeDecentp4ssw0rd
miningaddr=12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX
miningaddr=1M83ju3EChKYyysmM2FXtLNftbacagd8FR

2. Add dcrd's RPC TLS certificate to system Certificate Authority list.

cgminer uses curl to fetch data from the RPC server. Since curl validates the certificate by default, we must install the dcrd RPC certificate into the default system Certificate Authority list.

Ubuntu

  1. Copy rpc.cert to /usr/share/ca-certificates: # cp /home/user/.dcrd/rpc.cert /usr/share/ca-certificates/dcrd.crt
  2. Add dcrd.crt to /etc/ca-certificates.conf: # echo dcrd.crt >> /etc/ca-certificates.conf
  3. Update the CA certificate list: # update-ca-certificates

3. Set your mining software url to use https.

$ cgminer -o https://127.0.0.1:9109 -u rpcuser -p rpcpassword

3. Help

3.1 Startup

Typically dcrd will run and start downloading the block chain with no extra configuration necessary, however, there is an optional method to use a bootstrap.dat file that may speed up the initial block chain download process.

3.1.1 bootstrap.dat

3.1.2 Network Configuration

3.1 Wallet

dcrd was intentionally developed without an integrated wallet for security reasons. Please see dcrwallet for more information.

4. Contact

4.1 IRC

  • irc.freenode.net, channel #dcrd

4.2 Mailing Lists

  • dcrd: discussion of dcrd and its packages.
  • dcrd-commits: readonly mail-out of source code changes.

5. Developer Resources

  • The Decred-related Go Packages:
    • rpcclient - Implements a robust and easy to use Websocket-enabled Decred JSON-RPC client
    • dcrjson - Provides an extensive API for the underlying JSON-RPC command and return values
    • wire - Implements the Decred wire protocol
    • peer - Provides a common base for creating and managing Decred network peers.
    • blockchain - Implements Decred block handling and chain selection rules
    • blockchain/fullblocktests - Provides a set of block tests for testing the consensus validation rules
    • txscript - Implements the Decred transaction scripting language
    • dcrec - Implements support for the elliptic curve cryptographic functions needed for the Decred scripts
    • database - Provides a database interface for the Decred block chain
    • mempool - Package mempool provides a policy-enforced pool of unmined decred transactions.
    • dcrutil - Provides Decred-specific convenience functions and types
    • chainhash - Provides a generic hash type and associated functions that allows the specific hash algorithm to be abstracted.
    • connmgr - Package connmgr implements a generic Decred network connection manager.