# Installing the Mainchain Software
This documentation outlines how to install the Unification Mainchain
und software as a client, in
order to interact with any of the Mainchain networks to query data/send transactions.
If you intend to run a node and/or become a validator, follow the Install und with Cosmovisor instead.
# Installing the latest release binaries
If you are upgrading your
und binary from a previous version to v1.8.x, Cosmos SDK v0.46.x uses a new keyring
interface, and your keyring will be migrated the first time you interact with the upgraded
Please ensure you back up your keystore first, and make sure you have safely copied private keys and written down mnemonics!
On Linux systems, for example, the keyring may be located in
Safely backup your keyring and any keyfiles you may be using!
The latest pre-compiled binaries are available for download from https://github.com/unification-com/mainchain/releases (opens new window).
undbinary has been compiled for Linux, OSX and Windows.
Download the latest version of
Once downloaded, you can verify the SHA256 checksum against those listed in the release's
checksums.txt, for example:
openssl dgst -sha256 und_VERSION_DOWNLOADED.tar.gz
should output something like:
Extract them and copy the binaries to a suitable location - preferably a location in your
$PATH environment variable,
Once installed, verify:
und version --log_level=""
The output should match the latest release version tag.
# Building from Source
The Mainchain binaries can also be built from source.
make are required dependencies for building.
wget are recommended, and
jq is useful for
quickly looking up values in, for example
These can all be installed via your package manager, for example:
sudo apt-get install git curl wget make jq
sudo yum install git curl wget make jq
# Install Go
Go 1.16+ is required to build the Mainchain binaries
go by following the official docs (opens new window).
Once Go is installed, set your
$PATH environment variable:
$ mkdir -p $HOME/go/bin $ echo "export PATH=$PATH:$(go env GOPATH)/bin" >> ~/.bash_profile $ source ~/.bash_profile
# Build and install the binaries
unless you are contributing to Mainchain development, it is recommended you checkout and build from the latest release
tag and not the
master branch if you intend to connect to a live, public network (e.g. TestNet/MainNet).
Download the latest tagged Mainchain release from https://github.com/unification-com/mainchain/releases (opens new window)
[latest-release-tag] required for the command below can also be obtained by running:
curl --silent "https://api.github.com/repos/unification-com/mainchain/releases/latest" | grep -Po '"tag_name": "\K.*?(?=")'
$ git clone -b [latest-release-tag] https://github.com/unification-com/mainchain $ cd mainchain $ make install
This will install the
und binary into your
# Verify the installation
Run the following commands:
und version --long
und has been installed correctly, you should see output similar to the following:
name: UndMainchain server_name: und version: 1.6.3 commit: 4ce308e65a4a6de0d2d05f88b02584869f6b1c24 build_tags: netgo go: go version go1.18.5 linux/amd64 build_deps: ...SNIP... cosmos_sdk_version: v0.45.9
The included Mainchain DevNet network can be used for development and testing of new features and bug fixes locally. To build the binaries for testing without installing, run:
This will output the binaries to the
./build directory located in the repository root.
See the DevNet docs for more information about running DevNet.
# CLI Help
und commands can have the
--help flag passed
to output details on what commands are available, and flags enabled for that
--help flag can be passed to subcommands, for example:
und query wrkchain --help