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semaphore/apps/docs/versioned_docs/version-V4/getting-started.mdx
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---
sidebar_position: 2
---
# Getting started
Semaphore provides an official CLI to set up your project with Hardhat. If your NPM version is 5.2 or higher you can use NPX:
```bash
npx @semaphore-protocol/cli create my-app --template monorepo-ethers
```
Otherwise, install `@semaphore-protocol/cli` globally and run the `create` command:
```bash
npm i -g @semaphore-protocol/cli
semaphore create my-app --template monorepo-ethers
```
:::info
The supported templates are: [`contracts-hardhat`](https://github.com/semaphore-protocol/semaphore/tree/main/packages/cli-template-contracts-hardhat), [`monorepo-ethers`](https://github.com/semaphore-protocol/semaphore/tree/main/packages/cli-template-monorepo-ethers), [`monorepo-subgraph`](https://github.com/semaphore-protocol/semaphore/tree/main/packages/cli-template-monorepo-subgraph).
:::
:::info
The [`semaphore CLI`](https://github.com/semaphore-protocol/semaphore/tree/main/packages/cli) can also be used to get group data from a supported network (e.g. `semaphore get-groups --network sepolia`).
:::
To start working on your project, install the dependencies:
```bash
cd my-app
yarn
```
## Output
The `create` command will create a directory called my-app (or whatever name you choose) inside the current folder. That directory will contain the initial project structure, which includes a simple contract, a task to deploy it, some tests and a Next.js application (the web-app folder) to interact with that contract.
```
my-app
├── .yarn
├── apps
│ └── contracts
│ │ └── contracts
| │ │ └── Feedback.sol
│ │ └── tasks
| │ │ └── deploy.ts
│ │ └── test
| │ │ └── Feedback.ts
│ │ └── hardhat.config.ts
│ │ └── package.json
│ │ └── tsconfig.json
│ └── web-app
├── .editorconfig
├── .env
├── .env.example
├── .eslintignore
├── .eslintrc.json
├── .gitignore
├── .prettierignore
├── .prettierrc.json
├── .yarnrc.yml
├── package.json
├── README.md
└── tsconfig.json
```
The `Feedback.sol` contract creates a Semaphore group, allows users to join that group with their Semaphore identity, and finally allows group members to send an anonymous feedback.
## Usage
### Compile contracts
Go to the `contracts` folder:
```bash
cd apps/contracts
```
And compile your contracts:
```bash
yarn compile
```
### Test contracts
Test your contracts:
```bash
yarn test
```
Generate a test coverage report:
```bash
yarn test:coverage
```
Or a test gas report:
```bash
yarn test:report-gas
```
### Deploy contracts
Follow the instructions below to deploy your contracts:
In the project root folder:
1. Add your environment variables in the `.env` file.
:::note
You should at least set a valid Infura API Key (you could use Alchemy as well) and a private key with some ethers.
:::
2. Go to the `apps/contracts` folder and deploy your contract.
```bash
yarn deploy --semaphore <semaphore-address> --network sepolia
```
:::note
Check the Semaphore contract addresses [here](/deployed-contracts).
:::
:::caution
The group id is a number.
:::
### Start app
Start the application:
```bash
yarn dev
```
:::info
If you want to see the code of a comprehensive application built on top of Semaphore see the [boilerplate](https://github.com/semaphore-protocol/boilerplate/tree/main). For more info about the core libraries, keep reading the next guides.
:::