btcwallet is a daemon handling bitcoin wallet functionality for a single user. It acts as both an RPC client to btcd and an RPC server for wallet clients and legacy RPC applications.
Public and private keys are derived using the hierarchical
deterministic format described by
Unencrypted private keys are not supported and are never written to
disk. btcwallet uses the
m/44'/<coin type>'/<account>'/<branch>/<address index>
HD path for all derived addresses, as described by
Due to the sensitive nature of public data in a BIP0032 wallet, btcwallet provides the option of encrypting not just private keys, but public data as well. This is intended to thwart privacy risks where a wallet file is compromised without exposing all current and future addresses (public keys) managed by the wallet. While access to this information would not allow an attacker to spend or steal coins, it does mean they could track all transactions involving your addresses and therefore know your exact balance. In a future release, public data encryption will extend to transactions as well.
btcwallet is not an SPV client and requires connecting to a local or remote btcd instance for asynchronous blockchain queries and notifications over websockets. Full btcd installation instructions can be found here. An alternative SPV mode that is compatible with btcd and Bitcoin Core is planned for a future release.
Wallet clients can use one of two RPC servers:
A legacy JSON-RPC server mostly compatible with Bitcoin Core
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.
An experimental gRPC server
The gRPC server uses a new API built for btcwallet, but the API is not stabilized and the server is feature gated behind a config option (
--experimentalrpclisten). If you don't mind applications breaking due to API changes, don't want to deal with issues of the legacy API, or need notifications for changes to the wallet, this is the RPC server to use. The gRPC server is documented here.
Go 1.12 or newer.
Installation and updating
Windows - MSIs Available
Install the latest MSIs available here:
Windows/Linux/BSD/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
GOPATH above must not be the same path. It is
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 btcwallet, all dependencies, and install it:
$ cd $GOPATH/src/github.com/btcsuite/btcwallet $ GO111MODULE=on go install -v . ./cmd/...
- btcwallet (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.
Install a newer MSI
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/btcwallet $ git pull $ GO111MODULE=on go install -v . ./cmd/...
The following instructions detail how to get started with btcwallet connecting
to a localhost btcd. Commands should be run in
cmd.exe or PowerShell on
Windows, or any terminal emulator on *nix.
- Run the following command to start btcd:
btcd -u rpcuser -P rpcpass
- Run the following command to create a wallet:
btcwallet -u rpcuser -P rpcpass --create
- Run the following command to start btcwallet:
btcwallet -u rpcuser -P rpcpass
If everything appears to be working, it is recommended at this point to copy the sample btcd and btcwallet configurations and update with your RPC username and password.
PowerShell (Installed from MSI):
PS> cp "$env:ProgramFiles\Btcd Suite\Btcd\sample-btcd.conf" $env:LOCALAPPDATA\Btcd\btcd.conf PS> cp "$env:ProgramFiles\Btcd Suite\Btcwallet\sample-btcwallet.conf" $env:LOCALAPPDATA\Btcwallet\btcwallet.conf PS> $editor $env:LOCALAPPDATA\Btcd\btcd.conf PS> $editor $env:LOCALAPPDATA\Btcwallet\btcwallet.conf
PowerShell (Installed from source):
PS> cp $env:GOPATH\src\github.com\btcsuite\btcd\sample-btcd.conf $env:LOCALAPPDATA\Btcd\btcd.conf PS> cp $env:GOPATH\src\github.com\btcsuite\btcwallet\sample-btcwallet.conf $env:LOCALAPPDATA\Btcwallet\btcwallet.conf PS> $editor $env:LOCALAPPDATA\Btcd\btcd.conf PS> $editor $env:LOCALAPPDATA\Btcwallet\btcwallet.conf
Linux/BSD/POSIX (Installed from source):
$ cp $GOPATH/src/github.com/btcsuite/btcd/sample-btcd.conf ~/.btcd/btcd.conf $ cp $GOPATH/src/github.com/btcsuite/btcwallet/sample-btcwallet.conf ~/.btcwallet/btcwallet.conf $ $EDITOR ~/.btcd/btcd.conf $ $EDITOR ~/.btcwallet/btcwallet.conf
The integrated github issue tracker is used for this project.
GPG Verification Key
All official release tags are signed by Conformal so users can ensure the code has not been tampered with and is coming from the btcsuite developers. To verify the signature perform the following:
Download the public key from the Conformal website at https://opensource.conformal.com/GIT-GPG-KEY-conformal.txt
Import the public key into your GPG keyring:
gpg --import GIT-GPG-KEY-conformal.txt
Verify the release tag with the following command where
TAG_NAMEis a placeholder for the specific tag:
git tag -v TAG_NAME
btcwallet is licensed under the liberal ISC License.