add README

README.md

@@ -1,5 +1,134 @@
+
 # Keygen Relay
 
-**WIP:** please see the [spec](https://github.com/keygen-sh/keygen-relay/blob/master/SPEC.md)
-and [issues](https://github.com/keygen-sh/keygen-relay/issues) for current
-status.
+Keygen Relay is a server that helps manage the distribution of software licenses across nodes.
+It provides an API for claiming and releasing licenses, and comes with features such as license expiration (TTL), license claiming strategies, and heartbeats for tracking active nodes.
+
+## Features
+- License distribution and management
+- Heartbeat mechanism for license renewal
+- Configurable TTL (Time-to-Live) for licenses
+- Support for different distribution strategies: FIFO, LIFO, and Random
+- REST API for interaction
+
+## Installation
+
+### Build from source
+
+To build the Keygen Relay from the source, clone this repository and run:
+
+```bash
+go build -o relay ./cmd/relay
+```
+
+Alternatively, you can build binaries for different platforms and architectures using the provided `Makefile`:
+
+```bash
+make build # or make build-all
+```
+
+## Usage
+
+To start the relay server, use the following command:
+
+```bash
+./bin/relay serve --port 8080
+```
+
+### Available Flags
+
+`server` command comes with several flags that allow you to customize its behavior
+
+| Flag         | Description                                                                                                                                       | Default        |
+|--------------|---------------------------------------------------------------------------------------------------------------------------------------------------|----------------|
+| `--port`, `-p` | Specifies the port on which the relay server will run.                                                                                            | `8080`         |
+| `--no-heartbeats` | Disables the heartbeat mechanism. When this flag is enabled, the server will not track node activity.                                             | `false`        |
+| `--strategy` | Specifies the license assignment strategy. Options: `fifo`, `lifo`, `rand`.                                                                       | `fifo`         |
+| `--ttl`, `-t` | Sets the Time-to-Live (TTL) for license claims. After this period, licenses will be automatically released. Accepts values like `5s`, `30s`, `1m` |    `30s`
+| `--cleanup-interval` | Specifies how often the server should check for inactive nodes to clean up.                                                                       | `15s`          |
+| `--database` | Specify a custom database file for storing the license and node data.                                                                             | `relay.sqlite` |
+
+### Example Usage
+#### Start the server
+
+To start the server on port 8080 with a TTL of 30 seconds for licenses and FIFO license assignment:
+
+```bash
+./bin/relay serve --port 8080 --ttl 30s --strategy fifo
+```
+
+#### Claim a license
+Nodes can claim a license by sending a PUT request to the `/v1/nodes/{fingerprint}` endpoint:
+
+```bash
+curl -X PUT "http://localhost:8080/v1/nodes/$(cat /etc/machine-id)"
+```
+
+#### Release a license
+Nodes can release a license by sending a DELETE request to the same endpoint:
+
+```bash
+curl -X DELETE "http://localhost:8080/v1/nodes/$(cat /etc/machine-id)"
+```
+
+## CLI Commands
+
+### Add a License
+You can add a new license to the system using the add command:
+
+| Flag                 | Description                                                                                                                                      |
+|----------------------|--------------------------------------------------------------------------------------------------------------------------------------------------|
+| `--file`             | Path to the license file to be added.                                                                                                            | 
+| `--key`              | License key for decryption                                                                                                                       | 
+| `--public-key`       | Path to the public key for license verification                                                                                                  |
+
+
+```bash
+./relay add --file license.lic --key xxx --public-key xxx
+```
+
+### List licenses
+To list all the licenses in the database, use the ls command:
+
+```bash
+./relay ls
+```
+
+### License status
+To retrieve the status of a specific license, use the stat command:
+
+```bash
+./relay stat --id xxx
+```
+
+| Flag   | Description                                          |
+|--------|------------------------------------------------------|
+| `--id` | The unique ID of the license to retrieve info about  |
+
+### Delete a license
+To delete a license, use the del command:
+
+```bash
+./relay del --id xxx
+```
+
+## Development
+### Running Tests
+
+Keygen Relay comes with a suite of tests, including integration tests that verify behavior with the real server.
+
+- To run regular tests:
+
+  ```bash
+  make test
+  ```
+
+- To run integration tests (which are tagged with `// +build integrity`):
+
+  ```bash
+  make test-integration
+  ```
+
+## License
+
+This project is licensed under the MIT License. See the [LICENSE](https://github.com/keygen-sh/keygen-relay/blob/master/LICENSE) file for details.