embark/test_apps/test_app/config/blockchain.json

{
  "development": {
    "enabled": true,
    "networkType": "custom",
    "genesisBlock": "config/development/genesis.json",
    "datadir": ".embark/development/datadir",
    "mineWhenNeeded": true,
    "nodiscover": true,
    "maxpeers": 0,
    "rpcHost": "localhost",
    "rpcPort": 8545,
    "rpcCorsDomain": "auto",
    "account": {
      "password": "config/development/password"
    },
    "targetGasLimit": 8000000,
    "wsOrigins": "auto",
    "wsRPC": true,
    "wsHost": "localhost",
    "wsPort": 8546

  },
  "testnet": {
    "networkType": "testnet",
    "rpcHost": "localhost",
    "rpcPort": 8545
  },
  "livenet": {
    "networkType": "livenet",
    "rpcHost": "localhost",
    "rpcPort": 8545,
    "rpcCorsDomain": "http://localhost:8000",
    "account": {
      "password": "config/livenet/password"
    }
  },
  "privatenet": {
    "networkType": "custom",
    "rpcHost": "localhost",
    "rpcPort": 8545,
    "datadir": "yourdatadir",
    "networkId": "123",
    "bootnodes": ""
  }
}