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Before You Install
Before installing the Klaytn package, it is required to create the associated node information to enroll your node URIs. The Kgen package is provided for CC operators, please follow the steps in the order shown below.
  1. 1.
    Download kgen Package
  2. 2.
    Node Key & Node URI Creation
  3. 3.
    Node URI Enrollment

First of all, you can download the latest version of kgen package depending on your operating systems on Download page.
You can find the kgen binary file under the bin directory.

The node key and the node URI are created only once at the beginning. The node URI must be shared with other Core Cells of the Core Cell Network. A CN connects to other CNs and a PN connects to a CN and some PNs using the created node URI. A node URI is created based on the node key by using the downloaded kgen. The below command line creates nodekey as well as node_info.json.
kgen takes the associated IP and Port number as follows.
$ kgen --ip "123.456.789.012" --port 32323 --file
$ ls
nodekey node_info.json
The nodekey is a 64-byte hexadecimal string which is a private key used in the node internally. This private key must be present at the Klaytn data directory and be careful not to lose it.
$ cat nodekey
f08f2118c455a6c9c9b5e035d3571e570a719ea61771e268546e796a264acc2b
$ mv nodekey ~/kcnd_home
The created file node_info.json includes the following contents.
Key Name
Description
Example
NodeAddress
an address of the associated node
0xc8a23d67f2471066fa1b07270651fea7e5c0cf78
NodeKey
the node key (a.k.a private key)
aaa7248dfdf19418ae9121a0f39db39c5c27a3e404ea7c1b8e020ca8dbe7e71a
NodeURI
node URI
kni://4f2f47f3bf35a2c576d3345e6e9c49b147d510c05832d2458709f63c3c90c76ea[email protected]123.456.789.012:32323?discport=0
node_info.json contains the node information in a JSON format as follows.
$ cat node_info.json
{
"NodeAddress": "0xc8a23d67f2471066fa1b07270651fea7e5c0cf78",
"NodeKey": "aaa7248dfdf19418ae9121a0f39db39c5c27a3e404ea7c1b8e020ca8dbe7e71a",
"NodeURI": "kni://4f2f47f3bf35a2c576d3345e6e9c49b147d510c05832d2458709f63c3c90c76ea[email protected]123.456.789.012:32323?discport=0"
}

The created node URI should be enrolled to participate in the Core Cell Network (CCN). The process of the enrollment is as follows.
  1. 1.
    Create a node URI using kgen (node_info.json) which contains the associated IP and Port number.
  2. 2.
    Send the information to the official Klaytn email address ([email protected] for Cypress or [email protected] for Baobab).
The enrolled information should be sent to the official Klaytn email address. The format is as follows.
In case of CN,
Company: Kakao
CN URI : kni://
4f2f47f3bf35a2c576d3345e6e9c49b147d510c05832d2458709f63c3c90c76ea[email protected]123.456.789.012:32323?discport=0
In case of PN,
Company: Kakao
PN URI : kni://
4f2f47f3bf35a2c576d3345e6e9c49b147d510c05832d2458709f63c3c90c76ea[email protected]123.456.789.012:32323?discport=0
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Download kgen Package
Node Key & Node URI Creation
Node URI Enrollment