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description: Configuring Privacy

Configuring a Network for Private Transactions

Configuring a network that supports private transactions requires starting an Orion node for each Pantheon node. Pantheon command line options associate the Pantheon node with the Orion node.

This tutorial assumes you have completed setting up an IBFT 2.0 network to the point where you have created the genesis file. If not, complete steps 1 to 5 of the Create an IBFT 2.0 tutorial before continuing.

!!! important To support privacy, ensure your genesis file includes at least the constantinopleFixBlock milestone.

In this tutorial we start Orion nodes for the three Pantheon nodes and configure each Pantheon node to be associated with an Orion node.

1. Create Orion Directories

Inside each Node directory, create an Orion directory:

IBFT-Network/
├── Node-1
│   ├── data
│   ├── Orion
├── Node-2
│   ├── data
│   ├── Orion
└── Node-3
    ├── data
    ├── Orion

2. Create Password Files

In each Orion directory, create a file called passwordFile containing a password to encrypt each Orion key pair.

3. Generate Orion Keys

In each Orion directory, generate a public/private keypair for the Orion node:

orion -g nodeKey

At the prompt, enter the password saved in passwordFile to encrypt the key pair.

The Orion public/private key pair is generated and the keys saved in the nodeKey.pub and nodeKey.key files.

4. Create Orion Configuration Files

In the Node-1/Orion directory, create a file called orion.conf and add the following properties:

nodeurl = "http://127.0.0.1:8080/"
nodeport = 8080
clienturl = "http://127.0.0.1:8888/"
clientport = 8888
publickeys = ["nodeKey.pub"]
privatekeys = ["nodeKey.key"]
passwords = "passwordFile"
tls = "off"

!!! important In production systems, only specify tls is off if another transport security mechanism such as WireGuard is in place.

In the Node-2/Orion and Node-3/Orion directories, create orion.conf files specifying:

Different ports
Node-1 Orion node as the bootnode (specified by othernodes):

nodeurl = "http://127.0.0.1:8081/"
nodeport = 8081
clienturl = "http://127.0.0.1:8889/"
clientport = 8889
publickeys = ["nodeKey.pub"]
privatekeys = ["nodeKey.key"]
passwords = "passwordFile"
othernodes = ["http://127.0.0.1:8080/"]
tls = "off"

nodeurl = "http://127.0.0.1:8082/"
nodeport = 8082
clienturl = "http://127.0.0.1:8890/"
clientport = 8890
publickeys = ["nodeKey.pub"]
privatekeys = ["nodeKey.key"]
passwords = "passwordFile"
othernodes = ["http://127.0.0.1:8080/"]
tls = "off"

5. Start Orion Nodes

In each Orion directory, start Orion specifying the configuration file created in the previous step:

orion orion.conf

6. Start Pantheon Node-1

In the Node-1 directory, start Pantheon Node-1:

pantheon --data-path=data --genesis-file=../ibftGenesis.json --rpc-http-enabled --rpc-http-api=ETH,NET,IBFT,EEA --host-whitelist="*" --rpc-http-cors-origins="all" --privacy-enabled --privacy-url=http://127.0.0.1:8888 --privacy-public-key-file=Orion/nodeKey.pub --min-gas-price=0

pantheon --data-path=data --genesis-file=..\ibftGenesis.json --rpc-http-enabled --rpc-http-api=ETH,NET,IBFT,EEA --host-whitelist="*" --rpc-http-cors-origins="all" --privacy-enabled --privacy-url=http://127.0.0.1:8888 --privacy-public-key-file=Orion\nodeKey.pub --min-gas-price=0

The command line specifies privacy options:

--privacy-enabled enables privacy
--privacy-url specifies the Orion node URL (clienturl in orion.conf)
--privacy-public-key-file specifies the file containing Orion node public key (created in 3. Generate Orion Keys)
--rpc-http-api includes EEA in the list of JSON-RPC APIs to enable privacy JSON-RPC API methods.
--min-gas-price set to 0 for a free gas network.

When the node starts, the enode URL is displayed. Copy the enode URL to specify Node-1 as the bootnode in the following steps.

7. Start Pantheon Node-2

In the Node-2 directory, start Pantheon Node-2 specifying the Node-1 enode URL copied when starting Node-1 as the bootnode:

pantheon --data-path=data --genesis-file=../ibftGenesis.json --bootnodes=<Node-1 Enode URL> --p2p-port=30304 --rpc-http-enabled --rpc-http-api=ETH,NET,IBFT,EEA --host-whitelist="*" --rpc-http-cors-origins="all" --rpc-http-port=8546 --privacy-enabled --privacy-url=http://127.0.0.1:8889 --privacy-public-key-file=Orion/nodeKey.pub --min-gas-price=0

pantheon --data-path=data --genesis-file=..\ibftGenesis.json --bootnodes=<Node-1 Enode URL> --p2p-port=30304 --rpc-http-enabled --rpc-http-api=ETH,NET,IBFT,EEA --host-whitelist="*" --rpc-http-cors-origins="all" --rpc-http-port=8546 --privacy-enabled --privacy-url=http://127.0.0.1:8889 --privacy-public-key-file=Orion\nodeKey.pub --min-gas-price=0

The command line specifies the same options as for Node-1 with different ports and Orion node URL. The --bootnodes option specifies the enode URL for Node-1.

!!!note When running Pantheon from the Docker image, expose ports.

8. Start Pantheon Node-3

In the Node-3 directory and start Pantheon Node-3 specifying the Node-1 enode URL copied when starting Node-1 as the bootnode:

pantheon --data-path=data --genesis-file=../ibftGenesis.json --bootnodes=<Node-1 Enode URL> --p2p-port=30305 --rpc-http-enabled --rpc-http-api=ETH,NET,IBFT,EEA --host-whitelist="*" --rpc-http-cors-origins="all" --rpc-http-port=8547 --privacy-enabled --privacy-url=http://127.0.0.1:8890 --privacy-public-key-file=Orion/nodeKey.pub --min-gas-price=0

pantheon --data-path=data --genesis-file=..\ibftGenesis.json --bootnodes=<Node-1 Enode URL> --p2p-port=30305 --rpc-http-enabled --rpc-http-api=ETH,NET,IBFT,EEA --host-whitelist="*" --rpc-http-cors-origins="all" --rpc-http-port=8547 --privacy-enabled --privacy-url=http://127.0.0.1:8890 --privacy-public-key-file=Orion\nodeKey.pub --min-gas-price=0