dcrwallet

command module
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Published: May 5, 2023 License: ISC Imports: 60 Imported by: 0

README

dcrwallet

dcrwallet is a daemon handling Decred wallet functionality. All interaction with the wallet is performed over RPC.

Public and private keys are derived using the hierarchical deterministic format described by BIP0032. Unencrypted private keys are not supported and are never written to disk. dcrwallet uses the m/44'/<coin type>'/<account>'/<branch>/<address index> HD path for all derived addresses, as described by BIP0044.

dcrwallet provides two modes of operation to connect to the Decred network. The first (and default) is to communicate with a single trusted dcrd instance using JSON-RPC. The second is a privacy-preserving Simplified Payment Verification (SPV) mode (enabled with the --spv flag) where the wallet connects either to specified peers (with --spvconnect) or peers discovered from seeders and other peers. Both modes can be switched between with just a restart of the wallet. It is advised to avoid SPV mode for heavily-used wallets which require downloading most blocks regardless.

Not all functionality is available when running in SPV mode. Some of these features may become available in future versions, but only if a consensus vote passes to activate the required changes. Currently, the following features are disabled or unavailable to SPV wallets:

  • Voting

  • Revoking tickets before expiry

  • Determining exact number of live and missed tickets (as opposed to simply unspent).

Wallet clients interact with the wallet using one of two RPC servers:

  1. A JSON-RPC server inspired by the Bitcoin Core rpc server

    The JSON-RPC server exists to ease the migration of wallet applications from Core, but complete compatibility is not guaranteed. Some portions of the API (and especially accounts) have to work differently due to other design decisions (mostly due to BIP0044). However, if you find a compatibility issue and feel that it could be reasonably supported, please report an issue. This server is enabled by default as long as a username and password are provided.

  2. A gRPC server

    The gRPC server uses a new API built for dcrwallet, but the API is not stabilized. This server is enabled by default and may be disabled with the config option --nogrpc. If you don't mind applications breaking due to API changes, don't want to deal with issues of the JSON-RPC API, or need notifications for changes to the wallet, this is the RPC server to use. The gRPC server is documented here.

Installing and updating

Binaries (Windows/Linux/macOS)

Binary releases are provided for common operating systems and architectures. Please note that dcrwallet is CLI only. It is included in the CLI app suite. If you would prefer a graphical user interface (GUI) instead, consider downloading the GUI wallet Decrediton.

https://decred.org/downloads/

Build from source (all platforms)
  • Install Go 1.15 or 1.16

    Installation instructions can be found here: https://golang.org/doc/install. Ensure Go was installed properly and is a supported version:

    $ go version
    $ go env GOROOT GOPATH
    

    NOTE: GOROOT and GOPATH must not be on the same path. It is recommended to add $GOPATH/bin to your PATH according to the Golang.org instructions.

  • Build or Update dcrwallet

    Since dcrwallet is a single Go module, it's possible to use a single command to download, build, and install without needing to clone the repo. If using Go 1.16, run

    $ go install decred.org/dcrwallet/v2@master
    

    to build the latest master branch, or:

    $ go install decred.org/dcrwallet@latest
    

    for the latest released version.

    Any version, branch, or tag may be appended following a @ character after the package name. The implicit default is to build @latest, which is the latest semantic version tag. Building @master will build the latest development version. The module name, including any /vN suffix, must match the module line in the go.mod at that version. See go help install for more details.

    The dcrwallet executable will be installed to $GOPATH/bin. GOPATH defaults to $HOME/go (or %USERPROFILE%\go on Windows).

Getting Started

dcrwallet can connect to the Decred blockchain using either dcrd or by running in Simple Payment Verification (SPV) mode. Commands should be run in cmd.exe or PowerShell on Windows, or any terminal emulator on *nix.

  • Run the following command to create a wallet:
dcrwallet --create
  • To use dcrwallet in SPV mode:
dcrwallet --spv

dcrwallet will find external full node peers. It will take a few minutes to download the blockchain headers and filters, but it will not download full blocks.

  • To use dcrwallet using a localhost dcrd:

You will need to install both dcrd and dcrctl. dcrctl is the client that controls dcrd and dcrwallet via remote procedure call (RPC).

Please follow the instructions in the documentation, beginning with Startup Basics

Running Tests

All tests may be run using the script run_tests.sh. Generally, Decred only supports the current and previous major versions of Go.

./run_tests.sh

Contact

If you have any further questions you can find us at:

https://decred.org/community/

Issue Tracker

The integrated github issue tracker is used for this project.

Documentation

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

Additional documentation can be found on docs.decred.org.

License

dcrwallet is licensed under the liberal ISC License.

Documentation

The Go Gopher

There is no documentation for this package.

Directories

Path Synopsis
cmd
Package errors provides error creation and matching for all wallet systems.
Package errors provides error creation and matching for all wallet systems.
internal
loader
Package loader provides a concurrent safe implementation of a wallet loader.
Package loader provides a concurrent safe implementation of a wallet loader.
rpc/rpcserver
Package rpcserver implements the RPC API and is used by the main package to start gRPC services.
Package rpcserver implements the RPC API and is used by the main package to start gRPC services.
uniformprng
Package uniformprng implements a uniform, cryptographically secure pseudo-random number generator.
Package uniformprng implements a uniform, cryptographically secure pseudo-random number generator.
vsp
Package pgpwordlist provides the pgpwordlist for easier hashes/seeds.
Package pgpwordlist provides the pgpwordlist for easier hashes/seeds.
rpc
jsonrpc/types
Package types implements concrete types for the dcrwallet JSON-RPC API.
Package types implements concrete types for the dcrwallet JSON-RPC API.
Package validate provides context-free consensus validation.
Package validate provides context-free consensus validation.
Package wallet provides ...
Package wallet provides ...
drivers/bdb
Package bdb registers the bdb driver at init time.
Package bdb registers the bdb driver at init time.
internal/bdb
Package bdb implements an instance of walletdb that uses boltdb for the backing datastore.
Package bdb implements an instance of walletdb that uses boltdb for the backing datastore.
txauthor
Package txauthor provides transaction creation code for wallets.
Package txauthor provides transaction creation code for wallets.
txrules
Package txrules provides functions that are help establish whether or not a transaction abides by non-consensus rules for things like the daemon and stake pool.
Package txrules provides functions that are help establish whether or not a transaction abides by non-consensus rules for things like the daemon and stake pool.
udb
walletdb
Package walletdb provides a namespaced database interface for dcrwallet.
Package walletdb provides a namespaced database interface for dcrwallet.

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