# Create a Layer-1 Network {% hint style="info" %} A prerequisite for this tutorial is that you have a running node that is validating the primary network, for which the steps can find in the [Add a Juneo Supernet validator node ](/intro/validate/add-a-validator.md)guide. {% endhint %} We will be using example code found in the [juneojs-examples ](https://github.com/Juneo-io/juneojs-examples)repository to deploy our Layer-1 Blockchain (which uses the library [juneojs](https://www.npmjs.com/package/juneojs)). {% hint style="info" %} We recommend using JuneoJS on a system where you have access to a code editor. {% endhint %} ### Create a Layer-1 Network First, please make sure that you have the latest version of [NodeJS](https://nodejs.org/en) installed on your system. {% hint style="warning" %} If the version of NodeJS on your system is not up to date with the LTS version found at [https://nodejs.org](https://nodejs.org/en), the scripts in this guide will not be able to execute. {% endhint %} You will also need have the npm package[ ts-node](https://www.npmjs.com/package/ts-node) installed, which will be used to execute the sample code provided in JuneoJS. After verifying the information above, please download the [juneojs-examples](https://github.com/Juneo-io/juneojs-examples) repository to your local machine. If you have [git](https://git-scm.com/) installed on your system, please execute the following in your command line: ```bash git clone https://github.com/Juneo-io/juneojs-examples ``` The required files will be found in the directory `juneojs-examples`. Next, please open `juneojs-examples` in a command line and execute the following command: ```bash npm install ``` After this, open `juneojs-examples` in a code editor of your choice, create a .env file from the provided .env.example, and paste your mnemonic phrase in the MNEMONIC variable. Example: ```sh MNEMONIC="raven whip pave toy benefit moment twin acid wasp satisfy crash april" ``` To perform the transactions required to deploy a Layer-1 Network, you will need to have funds on the P-chain. In this tutorial, we will first be crossing assets from the JUNE-chain to the JVM-chain, and then from the JVM-chain to the P-chain. In a command line window open in the root of the JuneoJS library, execute the following: ```bash npx ts-node ./src/docs/crossJUNEtoJVM.ts ``` This will cross 1.1 JUNE from the JUNE-chain to the JVM-chain. After this, we will cross 1 JUNE from the JVM-chain to the P-chain by executing the following command: ```bash npx ts-node ./src/docs/crossJVMtoP.ts ``` The next step is the L1 Network creation. Please execute the following in the command line: ``` npx ts-node ./src/supernet/createSupernet.ts ``` This will produce an output to the terminal containing your supernetID. Example: *ZxTjijy4iNthRzuFFzMH5RS2BgJemYxwgZbzqzEhZJWqSnwh.* This is the id of the transaction that has created your L1, and is the id of the Layer-1 Network as well. Please save it as we will needed in the following steps. ### Add a validator to the Layer-1 Network The next step is to perform the addSupernetValidator transaction. {% hint style="info" %} If your L1 has no validators, all blockchains in that Layer-1 will be inactive and will not be able to process transactions. {% endhint %} Please open the file `./src/supernet/addSupernetValidator.ts` in your code editor, and update the following variables to contain the correct values. Example: ```typescript const nodeId: string = 'NodeID-B2GHMQ8GF6FyrvmPUX6miaGeuVLH9UwHr' const supernetId: string = 'ZxTjijy4iNthRzuFFzMH5RS2BgJemYxwgZbzqzEhZJWqSnwhP' const durationInDays: number = 20 // number of days you will validate your Supernet ``` We will keep the **durationInDays** variable the same. However, you may update it to a diffent value. {% hint style="info" %} The variable **durationInDays** must be less than the amount of remaining days your node will be validating the Primary network. If your node has 21 days (or a little over 20 days) left of Primary Network validation, you must set **durationInDays** to 20 or less. {% endhint %} Then, execute this file: ```sh npx ts-node ./src/supernet/addSupernetValidator.ts ``` This will add our node as a validator for our Layer-1 Network. However, we need to perform an additional step before our node can begin validating our L1. First, please stop your node. For users following the [manual ](/intro/build/set-up-and-connect-a-node-manually.md)guide for setting up juneogo: please create a file titled `config.json` in the home directory. For users following the [install script](/intro/build/set-up-and-connect-a-node.md) guide for setting up juneogo: your `config.json` can already be found in the home directory. For users who are running juneogo using [juneogo-docker](https://github.com/Juneo-io/juneogo-docker): your config file can be found in the `juneogo-docker/juneogo/.juneogo/config.json` directory. In your `config.json` file, please include the configuration flag `track-supernets,` specifying the L1s you want your node to track (in this case, the Layer-1 you have just created). Example: ```json { "track-supernets":"ZxTjijy4iNthRzuFFzMH5RS2BgJemYxwgZbzqzEhZJWqSnwhP" } ``` After saving the file, you may run your node again. For users following the [manual ](/intro/build/set-up-and-connect-a-node-manually.md)juneogo setup guide, please execute the following : ```bash ./juneogo --config-file="./config.json" ``` For users following the [install script](/intro/build/set-up-and-connect-a-node.md) juneogo setup guide, please restart the juneogo service: ```bash systemctl --user restart juneogo.service ``` For users running juneogo using [juneogo-docker](https://github.com/Juneo-io/juneogo-docker), please re-start your node using docker compose. Your node is now tracking the Layer-1 Network you have just created. {% hint style="info" %} If **your node** is the only node validating your L1 - once your node stops validating it, all chains within it will not be able to process transactions. You would have to re-perform the **Add** Supernet **Validator** transaction for your Layer-1 Network to process transactions again. {% endhint %} You may now proceed to the next step: [Deploy a VM](/intro/build/deploy-a-vm.md). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.juneo.com/intro/build/create-a-supernet.md?ask= ``` The question should be specific, self-contained, and written in natural language. 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