Get configuration filesΒΆ

Starting the node and connecting it to the network requires 3 configuration files:

  • topology.json

  • genesis.json

  • config.json

You can download the configuration files from:

https://hydra.iohk.io/job/Cardano/cardano-node/cardano-deployment/latest-finished/download/1/index.html

From the CLI you can use

For Cardano testnet

wget https://hydra.iohk.io/job/Cardano/cardano-node/cardano-deployment/latest-finished/download/1/testnet-config.json
wget https://hydra.iohk.io/job/Cardano/cardano-node/cardano-deployment/latest-finished/download/1/testnet-byron-genesis.json
wget https://hydra.iohk.io/job/Cardano/cardano-node/cardano-deployment/latest-finished/download/1/testnet-shelley-genesis.json
wget https://hydra.iohk.io/job/Cardano/cardano-node/cardano-deployment/latest-finished/download/1/testnet-topology.json

For Mainnet:

wget https://hydra.iohk.io/job/Cardano/cardano-node/cardano-deployment/latest-finished/download/1/mainnet-config.json
wget https://hydra.iohk.io/job/Cardano/cardano-node/cardano-deployment/latest-finished/download/1/mainnet-byron-genesis.json
wget https://hydra.iohk.io/job/Cardano/cardano-node/cardano-deployment/latest-finished/download/1/mainnet-shelley-genesis.json
wget https://hydra.iohk.io/job/Cardano/cardano-node/cardano-deployment/latest-finished/download/1/mainnet-topology.json

Starting the the node uses the command cardano-node run and a set of options.

Get the complete list of available options with cardano-node run --help

--topology FILEPATH             The path to a file describing the topology.
--database-path FILEPATH        Directory where the state is stored.
--socket-path FILEPATH          Path to a cardano-node socket
--host-addr HOST-NAME           Optionally limit node to one ipv6 or ipv4 address
--port PORT                     The port number
--config NODE-CONFIGURATION     Configuration file for the cardano-node
--validate-db                   Validate all on-disk database files
--shutdown-ipc FD               Shut down the process when this inherited FD reaches EOF
--shutdown-on-slot-synced SLOT  Shut down the process after ChainDB is synced up to the
                                specified slot
-h,--help                       Show this help text

To start a passive node:

 cardano-node run \
   --topology path/to/mainnet-topology.json \
   --database-path path/to/db \
   --socket-path path/to/db/node.socket \
   --host-addr x.x.x.x \
   --port 3001 \
   --config path/to/mainnet-config.json

Replace x.x.x.x with your public IP and indicate the correct paths to the required files.

Many commands relay on the environment variable CARDANO_NODE_SOCKET_PATH:

export CARDANO_NODE_SOCKET_PATH=path/to/db/node.socket

Check that the node is syncing by fetching the current tip. When syncing slotNo should be increasing.

    cardano-cli shelley query tip --mainnet

    {
    "blockNo": 36322,
    "headerHash": "3f1bea22be21452415851ae670f4bac9340471cb7f2f6a664fac56d7f60dbaad",
    "slotNo": 888561
    }

Note--mainnet identifies the Cardano mainnet, for testnets use --testnet-magic 1097911063 instead.