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Published: May 28, 2023 License: ISC Imports: 63 Imported by: 0

README

btcd

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

This project is currently under active development and is in a Beta state. It is extremely stable and has been in production use since October 2013.

It properly downloads, validates, and serves the block chain using the exact rules (including consensus bugs) for block acceptance as Bitcoin Core. We have taken great care to avoid btcd causing a fork to the block chain. It includes a full block validation testing framework which contains all of the 'official' block acceptance tests (and some additional ones) that is run on every pull request to help ensure it properly follows consensus. Also, it passes all of the JSON test data in the Bitcoin Core code.

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 by the block chain and also includes more strict checks which filter transactions based on miner requirements ("standard" transactions).

One key difference between btcd and Bitcoin Core 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 Paymetheus (Windows-only) projects which are both under active development.

Requirements

Go 1.17 or newer.

Installation

https://github.com/btcsuite/btcd/releases

Linux/BSD/MacOSX/POSIX - Build from Source
  • Install Go according to the installation instructions here: http://golang.org/doc/install

  • Ensure Go was installed properly and is a supported version:

$ go version
$ go env GOROOT GOPATH

NOTE: The GOROOT and GOPATH above must not be the same path. It is recommended that GOPATH is set to a directory in your home directory such as ~/goprojects to avoid write permission issues. It is also recommended to add $GOPATH/bin to your PATH at this point.

  • Run the following commands to obtain btcd, all dependencies, and install it:
$ cd $GOPATH/src/github.com/btcsuite/btcd
$ GO111MODULE=on go install -v . ./cmd/...
  • btcd (and utilities) will now be installed in $GOPATH/bin. If you did not already add the bin directory to your system path during Go installation, we recommend you do so now.

Updating

Linux/BSD/MacOSX/POSIX - Build from Source
  • Run the following commands to update btcd, all dependencies, and install it:
$ cd $GOPATH/src/github.com/btcsuite/btcd
$ git pull
$ GO111MODULE=on go install -v . ./cmd/...

Getting Started

btcd has several configuration options available to tweak how it runs, but all of the basic operations described in the intro section work with zero configuration.

Linux/BSD/POSIX/Source
$ ./btcd

IRC

  • irc.libera.chat
  • channel #btcd
  • webchat

Issue Tracker

The integrated github issue tracker is used for this project.

Documentation

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

Release Verification

Please see our documentation on the current build/verification process for all our releases for information on how to verify the integrity of published releases using our reproducible build system.

License

btcd is licensed under the copyfree ISC License.

Documentation

Overview

btcd is a full-node bitcoin implementation written in Go.

The default options are sane for most users. This means btcd 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 btcd starts up. By default, the configuration file is located at ~/.btcd/btcd.conf on POSIX-style operating systems and %LOCALAPPDATA%\btcd\btcd.conf on Windows. The -C (--configfile) flag, as shown below, can be used to override this location.

Usage:

btcd [OPTIONS]

Application Options:

    --addcheckpoint=        Add a custom checkpoint.  Format:
                            '<height>:<hash>'
-a, --addpeer=              Add a peer to connect with at startup
    --addrindex             Maintain a full address-based transaction index
                            which makes the searchrawtransactions RPC
                            available
    --banduration=          How long to ban misbehaving peers.  Valid time
                            units are {s, m, h}.  Minimum 1 second (default:
                            24h0m0s)
    --banthreshold=         Maximum allowed ban score before disconnecting
                            and banning misbehaving peers. (default: 100)
    --blockmaxsize=         Maximum block size in bytes to be used when
                            creating a block (default: 750000)
    --blockminsize=         Mininum block size in bytes to be used when
                            creating a block
    --blockmaxweight=       Maximum block weight to be used when creating a
                            block (default: 3000000)
    --blockminweight=       Mininum block weight to be used when creating a
                            block
    --blockprioritysize=    Size in bytes for high-priority/low-fee
                            transactions when creating a block (default:
                            50000)
    --blocksonly            Do not accept transactions from remote peers.
-C, --configfile=           Path to configuration file
    --connect=              Connect only to the specified peers at startup
    --cpuprofile=           Write CPU profile to the specified file
-b, --datadir=              Directory to store data
    --dbtype=               Database backend to use for the Block Chain
                            (default: ffldb)
-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 (default:
                            info)
    --dropaddrindex         Deletes the address-based transaction index from
                            the database on start up and then exits.
    --dropcfindex           Deletes the index used for committed filtering
                            (CF) support from the database on start up and
                            then exits.
    --droptxindex           Deletes the hash-based transaction index from the
                            database on start up and then exits.
    --externalip=           Add an ip to the list of local addresses we claim
                            to listen on to peers
    --generate              Generate (mine) bitcoins using the CPU
    --limitfreerelay=       Limit relay of transactions with no transaction
                            fee to the given amount in thousands of bytes per
                            minute (default: 15)
    --listen=               Add an interface/port to listen for connections
                            (default all interfaces port: 8333, testnet:
                            18333, signet: 38333)
    --logdir=               Directory to log output
    --maxorphantx=          Max number of orphan transactions to keep in
                            memory (default: 100)
    --maxpeers=             Max number of inbound and outbound peers
                            (default: 125)
    --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
    --minrelaytxfee=        The minimum transaction fee in BTC/kB to be
                            considered a non-zero fee. (default: 1e-05)
    --nobanning             Disable banning of misbehaving peers
    --nocfilters            Disable committed filtering (CF) support
    --nocheckpoints         Disable built-in checkpoints.  Don't do this
                            unless you know what you're doing.
    --nodnsseed             Disable DNS seeding for peers
    --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
    --noonion               Disable connecting to tor hidden services
    --nopeerbloomfilters    Disable bloom filtering support
    --norelaypriority       Do not require free or low-fee transactions to
                            have high priority for relaying
    --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
    --onion=                Connect to tor hidden services via SOCKS5 proxy
                            (eg. 127.0.0.1:9050)
    --onionpass=            Password for onion proxy server
    --onionuser=            Username for onion proxy server
    --profile=              Enable HTTP profiling on given port -- NOTE port
                            must be between 1024 and 65536
    --proxy=                Connect via SOCKS5 proxy (eg. 127.0.0.1:9050)
    --proxypass=            Password for proxy server
    --proxyuser=            Username for proxy server
    --regtest               Use the regression test network
    --rejectnonstd          Reject non-standard transactions regardless of
                            the default settings for the active network.
    --relaynonstd           Relay non-standard transactions regardless of the
                            default settings for the active network.
    --rpccert=              File containing the certificate file
    --rpckey=               File containing the certificate key
    --rpclimitpass=         Password for limited RPC connections
    --rpclimituser=         Username for limited RPC connections
    --rpclisten=            Add an interface/port to listen for RPC
                            connections (default port: 8334, testnet: 18334)
    --rpcmaxclients=        Max number of RPC clients for standard
                            connections (default: 10)
    --rpcmaxconcurrentreqs= Max number of concurrent RPC requests that may be
                            processed concurrently (default: 20)
    --rpcmaxwebsockets=     Max number of RPC websocket connections (default:
                            25)
    --rpcquirks             Mirror some JSON-RPC quirks of Bitcoin Core --
                            NOTE: Discouraged unless interoperability issues
                            need to be worked around
-P, --rpcpass=              Password for RPC connections
-u, --rpcuser=              Username for RPC connections
    --sigcachemaxsize=      The maximum number of entries in the signature
                            verification cache (default: 100000)
    --simnet                Use the simulation test network
    --testnet               Use the test network
    --torisolation          Enable Tor stream isolation by randomizing user
                            credentials for each connection.
    --trickleinterval=      Minimum time between attempts to send new
                            inventory to a connected peer (default: 10s)
    --txindex               Maintain a full hash-based transaction index
                            which makes all transactions available via the
                            getrawtransaction RPC
    --uacomment=            Comment to add to the user agent -- See BIP 14
                            for more information.
    --upnp                  Use UPnP to map our listening port outside of NAT
-V, --version               Display version information and exit
    --whitelist=            Add an IP network or IP that will not be banned.
                            (eg. 192.168.1.0/24 or ::1)

Help Options:

-h, --help           Show this help message

Directories

Path Synopsis
Package addrmgr implements concurrency safe Bitcoin address manager.
Package addrmgr implements concurrency safe Bitcoin address manager.
Package blockchain implements bitcoin block handling and chain selection rules.
Package blockchain implements bitcoin block handling and chain selection rules.
fullblocktests
Package fullblocktests provides a set of block consensus validation tests.
Package fullblocktests provides a set of block consensus validation tests.
indexers
Package indexers implements optional block chain indexes.
Package indexers implements optional block chain indexes.
Package btcec implements support for the elliptic curves needed for bitcoin.
Package btcec implements support for the elliptic curves needed for bitcoin.
Package btcjson provides primitives for working with the bitcoin JSON-RPC API.
Package btcjson provides primitives for working with the bitcoin JSON-RPC API.
Package btclog defines an interface and default implementation for subsystem logging.
Package btclog defines an interface and default implementation for subsystem logging.
Package btcutil provides bitcoin-specific convenience functions and types.
Package btcutil provides bitcoin-specific convenience functions and types.
base58
Package base58 provides an API for working with modified base58 and Base58Check encodings.
Package base58 provides an API for working with modified base58 and Base58Check encodings.
bech32
Package bech32 provides a Go implementation of the bech32 format specified in BIP 173.
Package bech32 provides a Go implementation of the bech32 format specified in BIP 173.
gcs
Package gcs provides an API for building and using a Golomb-coded set filter.
Package gcs provides an API for building and using a Golomb-coded set filter.
hdkeychain
Package hdkeychain provides an API for bitcoin hierarchical deterministic extended keys (BIP0032).
Package hdkeychain provides an API for bitcoin hierarchical deterministic extended keys (BIP0032).
psbt
Package psbt is an implementation of Partially Signed Bitcoin Transactions (PSBT).
Package psbt is an implementation of Partially Signed Bitcoin Transactions (PSBT).
txsort
Package txsort provides the transaction sorting according to BIP 69.
Package txsort provides the transaction sorting according to BIP 69.
Package chaincfg defines chain configuration parameters.
Package chaincfg defines chain configuration parameters.
chainhash
Package chainhash provides abstracted hash functionality.
Package chainhash provides abstracted hash functionality.
cmd
Package connmgr implements a generic Bitcoin network connection manager.
Package connmgr implements a generic Bitcoin network connection manager.
Package database provides a block and metadata storage database.
Package database provides a block and metadata storage database.
ffldb
Package ffldb implements a driver for the database package that uses leveldb for the backing metadata and flat files for block storage.
Package ffldb implements a driver for the database package that uses leveldb for the backing metadata and flat files for block storage.
internal/treap
Package treap implements a treap data structure that is used to hold ordered key/value pairs using a combination of binary search tree and heap semantics.
Package treap implements a treap data structure that is used to hold ordered key/value pairs using a combination of binary search tree and heap semantics.
rpctest
Package rpctest provides a btcd-specific RPC testing harness crafting and executing integration tests by driving a `btcd` instance via the `RPC` interface.
Package rpctest provides a btcd-specific RPC testing harness crafting and executing integration tests by driving a `btcd` instance via the `RPC` interface.
Package mempool provides a policy-enforced pool of unmined bitcoin transactions.
Package mempool provides a policy-enforced pool of unmined bitcoin transactions.
Package netsync implements a concurrency safe block syncing protocol.
Package netsync implements a concurrency safe block syncing protocol.
Package peer provides a common base for creating and managing Bitcoin network peers.
Package peer provides a common base for creating and managing Bitcoin network peers.
Package rpcclient implements a websocket-enabled Bitcoin JSON-RPC client.
Package rpcclient implements a websocket-enabled Bitcoin JSON-RPC client.
Package txscript implements the bitcoin transaction script language.
Package txscript implements the bitcoin transaction script language.
Package wire implements the bitcoin wire protocol.
Package wire implements the bitcoin wire protocol.

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