bchd

README

bchd

bchd is an alternative full node bitcoin cash implementation written in Go (golang).

This project is a port of the btcd codebase to Bitcoin Cash. It provides a high powered and reliable blockchain server which makes it a suitable backend to serve blockchain data to lite clients and block explorers or to power your local wallet.

bchd does not include any wallet functionality by design as it makes the codebase more modular and easy to maintain. The bchwallet is a separate application that provides a secure Bitcoin Cash wallet that communicates with your running bchd instance via the API.

Table of Contents

• Requirements
• Install
  • Install prebuilt packages
  • Build from Source
• Getting Started
• Documentation
• Contributing
• License

Requirements

Go 1.8 or newer.

Install

Install Pre-built Packages

The easiest way to run the server is to download a pre-built binary. You can find binaries of our latest release for each operating system at the releases page.

Build from Source

If you prefer to install from source do the following:

• Install Go according to the installation instructions here: http://golang.org/doc/install

• Run the following commands to obtain btcd, all dependencies, and install it:

$ go get github.com/gcash/bchd

This will download and compile bchd and put it in your path.

Getting Started

To start bchd with default options just run:

$ ./bchd

You'll find a large number of runtime options on the help menu. All of which can also be set in a config file. See the sample config file for an example of how to use it.

Docker

Building and running bchd in docker is quite painless. To build the image:

docker build . -t bchd

To run the image:

docker run bchd

To run bchctl and connect to your bchd instance:

# Find the running bchd container.
docker ps

# Exec bchctl.
docker exec <container> bchctl <command>

Documentation

The documentation is a work-in-progress. It is located in the docs folder.

Contributing

Contributions are definitely welcome! Please read the contributing guidelines before starting.

License

bchd is licensed under the copyfree ISC License.

Documentation

Overview

bchd is a full-node bitcoin cash implementation written in Go.

The default options are sane for most users. This means bchd will work 'out of the box' for most users. However, there are also a wide variety of flags that can be used to control it.

The following section provides a usage overview which enumerates the flags. An interesting point to note is that the long form of all of these options (except -C) can be specified in a configuration file that is automatically parsed when bchd starts up. By default, the configuration file is located at ~/.bchd/bchd.conf on POSIX-style operating systems and %LOCALAPPDATA%\bchd\bchd.conf on Windows. The -C (--configfile) flag, as shown below, can be used to override this location.

Usage:

bchd [OPTIONS]

Application Options:

-V, --version             Display version information and exit
-C, --configfile=         Path to configuration file
-b, --datadir=            Directory to store data
    --logdir=             Directory to log output.
-a, --addpeer=            Add a peer to connect with at startup
    --connect=            Connect only to the specified peers at startup
    --nolisten            Disable listening for incoming connections -- NOTE:
                          Listening is automatically disabled if the --connect
                          or --proxy options are used without also specifying
                          listen interfaces via --listen
    --listen=             Add an interface/port to listen for connections
                          (default all interfaces port: 8333, testnet: 18333)
    --maxpeers=           Max number of inbound and outbound peers (125)
    --nobanning           Disable banning of misbehaving peers
    --banduration=        How long to ban misbehaving peers.  Valid time units
                          are {s, m, h}.  Minimum 1 second (24h0m0s)
    --banthreshold=       Maximum allowed ban score before disconnecting and
                          banning misbehaving peers.
    --whitelist=          Add an IP network or IP that will not be banned.
                          (eg. 192.168.1.0/24 or ::1)
-u, --rpcuser=            Username for RPC connections
-P, --rpcpass=            Password for RPC connections
    --rpclimituser=       Username for limited RPC connections
    --rpclimitpass=       Password for limited RPC connections
    --rpclisten=          Add an interface/port to listen for RPC connections
                          (default port: 8334, testnet: 18334)
    --rpccert=            File containing the certificate file
    --rpckey=             File containing the certificate key
    --rpcmaxclients=      Max number of RPC clients for standard connections
                          (10)
    --rpcmaxwebsockets=   Max number of RPC websocket connections (25)
    --rpcquirks           Mirror some JSON-RPC quirks of Bitcoin Core -- NOTE:
                          Discouraged unless interoperability issues need to
                          be worked around
    --norpc               Disable built-in RPC server -- NOTE: The RPC server
                          is disabled by default if no rpcuser/rpcpass or
                          rpclimituser/rpclimitpass is specified
    --notls               Disable TLS for the RPC server -- NOTE: This is only
                          allowed if the RPC server is bound to localhost
    --nodnsseed           Disable DNS seeding for peers
    --externalip=         Add an ip to the list of local addresses we claim to
                          listen on to peers
    --proxy=              Connect via SOCKS5 proxy (eg. 127.0.0.1:9050)
    --proxyuser=          Username for proxy server
    --proxypass=          Password for proxy server
    --onion=              Connect to tor hidden services via SOCKS5 proxy
                          (eg. 127.0.0.1:9050)
    --onionuser=          Username for onion proxy server
    --onionpass=          Password for onion proxy server
    --noonion             Disable connecting to tor hidden services
    --torisolation        Enable Tor stream isolation by randomizing user
                          credentials for each connection.
    --testnet             Use the test network
    --regtest             Use the regression test network
    --simnet              Use the simulation test network
    --addcheckpoint=      Add a custom checkpoint.  Format: '<height>:<hash>'
    --nocheckpoints       Disable built-in checkpoints.  Don't do this unless
                          you know what you're doing.
    --uacomment=          Comment to add to the user agent --
                          See BIP 14 for more information.
    --dbtype=             Database backend to use for the Block Chain (ffldb)
    --profile=            Enable HTTP profiling on given port -- NOTE port
                          must be between 1024 and 65536
    --cpuprofile=         Write CPU profile to the specified file
-d, --debuglevel=         Logging level for all subsystems {trace, debug,
                          info, warn, error, critical} -- You may also specify
                          <subsystem>=<level>,<subsystem2>=<level>,... to set
                          the log level for individual subsystems -- Use show
                          to list available subsystems (info)
    --upnp                Use UPnP to map our listening port outside of NAT
    --minrelaytxfee=      The minimum transaction fee in BCH/kB to be
                          considered a non-zero fee.
    --limitfreerelay=     Limit relay of transactions with no transaction fee
                          to the given amount in thousands of bytes per
                          minute (15)
    --norelaypriority     Do not require free or low-fee transactions to have
                          high priority for relaying
    --maxorphantx=        Max number of orphan transactions to keep in memory
                          (100)
    --generate            Generate (mine) bitcoins using the CPU
    --miningaddr=         Add the specified payment address to the list of
                          addresses to use for generated blocks -- At least
                          one address is required if the generate option is
                          set
    --blockminsize=       Mininum block size in bytes to be used when creating
                          a block
    --blockmaxsize=       Maximum block size in bytes to be used when creating
                          a block (750000)
    --blockprioritysize=  Size in bytes for high-priority/low-fee transactions
                          when creating a block (50000)
    --nopeerbloomfilters  Disable bloom filtering support.
    --nocfilters          Disable committed filtering (CF) support.
    --sigcachemaxsize=    The maximum number of entries in the signature
                          verification cache.
    --blocksonly          Do not accept transactions from remote peers.
    --relaynonstd         Relay non-standard transactions regardless of the
                          default settings for the active network.
    --rejectnonstd        Reject non-standard transactions regardless of the
                          default settings for the active network.

Help Options:

-h, --help           Show this help message