OpenEthereum (formerly Parity)

xDai with POSDAO runs on OpenEthereum v3.0.0

Install OpenEthereum

DO NOT use the latest version of OpenEthereum (3.1+), as it does not include important POSDAO features needed for xDai. Version 3.0.1 supports xDai, as does 3.0.0 and 2.7.2. Download binaries here for Linux, Mac & Windows: Note: if binary does not come up, check the url to ensure it includes parity-ethereum rather than forwarding to the new repo.

Binary Instructions

These instructions are copied from the OpenEthereum wiki.

  • Linux

    • Download the latest release from the link above

    • Make the openethereum file executable by running chmod u+x openethereum

    • Launch OpenEthereum: ./openethereum --chain xdai --no-warp

The --no-warp flag is recommended if you want all historical data, but will take much longer to sync. For a faster sync, you do not need to use it. More information on --no-warp

  • Mac

    • Download the mac binary.

    • Open a terminal and navigate to the directory using cd /path/to/binary/folder/.

    • Make the binary executable by running chmod +x openethereum.

    • You can now double click on the binary.

  • Windows Download the binary and double click on it.


For Linux systems:

  • Ubuntu, Debian

    $ apt-get install build-essential cmake libudev-dev
  • CentOS

    $ yum install libudev-devel
    $ yum group install "Development Tools"

Once OpenEthereum is Installed, Connect and Sync with xDai

openethereum --chain xdai --no-warp


--no-warp flag is optional: more information.

If you would like to limit or choose specific bootnodes, you can obtain the bootnodes.txt file from POA github:

git clone -b dai

enter all supplied enodes for the desired network separated by a comma, no space

openethereum --chain xdai --bootnodes enode://[email protected]:PORT,enode://[email protected]:PORT

Connect to your Node

You can use Ethereum's JSON-RPC or a JavaScript console.

Smart contract development

You can use Remix connected to a local OpenEthereum full node for smart contracts development and deployment. Make sure that Remix is allowed to connect to your node by setting up the right JSON-RPC cors policy.