quorum/docs/Privacy/Constellation/Installation & Running.md

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## Installation
### Prerequisites
1. Install supporting libraries:
- Ubuntu: `apt-get install libdb-dev libleveldb-dev libsodium-dev zlib1g-dev libtinfo-dev`
- Red Hat: `dnf install libdb-devel leveldb-devel libsodium-devel zlib-devel ncurses-devel`
- MacOS: `brew install berkeley-db leveldb libsodium`
### Downloading precompiled binaries
Constellation binaries for most major platforms can be downloaded [here](https://github.com/jpmorganchase/constellation/releases).
### Installation from source
1. First time only: Install Stack:
- Linux: `curl -sSL https://get.haskellstack.org/ | sh`
- MacOS: `brew install haskell-stack`
2. First time only: run `stack setup` to install GHC, the Glasgow
Haskell Compiler
3. Run `stack install`
## Generating keys
1. To generate a key pair "node", run `constellation-node --generatekeys=node`
If you choose to lock the keys with a password, they will be encrypted using
a master key derived from the password using Argon2id. This is designed to be
a very expensive operation to deter password cracking efforts. When
constellation encounters a locked key, it will prompt for a password after
which the decrypted key will live in memory until the process ends.
## Running
1. Run `constellation-node <path to config file>` or specify configuration
variables as command-line options (see `constellation-node --help`)
Please refer to the [Constellation client Go library](../constellation-go)
for an example of how to use Constellation.