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README.md
<p align="center"> 
    <img alt="deltaos" width="1412" src="https://delta.org/deltaos.png">
</p>

<p align="center">
    <a href="https://circleci.com/gh/ProvableHQ/deltaos"><img src="https://circleci.com/gh/ProvableHQ/deltaos.svg?style=svg"></a>
    <a href="https://codecov.io/gh/ProvableHQ/deltaos"><img src="https://codecov.io/gh/ProvableHQ/deltaos/branch/master/graph/badge.svg?token=cck8tS9HpO"/></a>
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</p>

## <a name='TableofContents'></a>Table of Contents

* [1. Overview](#1-overview)
* [2. Build Guide](#2-build-guide)
  * [2.1 Requirements](#21-requirements)
  * [2.2 Installation](#22-installation)
* [3. Run an Alpha Node](#3-run-an-alpha-node)
  * [3.1 Run an Alpha Client](#31-run-an-alpha-client)
  * [3.2 Run an Alpha Validator](#32-run-an-alpha-validator)
  * [3.3 Run an Alpha Prover](#33-run-an-alpha-prover)
* [4. FAQs](#4-faqs)
* [5. Command Line Interface](#5-command-line-interface)
* [6. Development Guide](#6-development-guide)
  * [6.1 Quick Start](#61-quick-start)
  * [6.2 Operations](#62-operations)
  * [6.3 Local Devnet](#63-local-devnet)
  * [6.4 Feature Flags](#64-feature-flags)
* [7. Contributors](#7-contributors)
* [8. License](#8-license)

[comment]: <> (* [4. JSON-RPC Interface]&#40;#4-json-rpc-interface&#41;)
[comment]: <> (* [5. Additional Information]&#40;#5-additional-information&#41;)

## 1. Overview

__deltaos__ is a decentralized operating system for zero-knowledge applications.
This code forms the backbone of [Alpha](https://delta.org/) network,
which verifies transactions and stores the encrypted state applications in a publicly-verifiable manner.

## 2. Build Guide

### 2.1 Definitions

The following deltaos node types exist in the Alpha network:
 - **Validator**: Validator nodes participate in consensus and must be started with an account that is bonded into the committee.
 - **Client**: Clients do not participate in consensus but maintain a ledger. They are capable of providing information about the network as well as accepting solutions and transactions and communicating them to their peers. All clients run the same software, however, for the purposes of configuration management, this document defines two types of clients:
    - Core Client: Client node connected directly to a validator node.
    - Outer Client: Client node connected only to other clients or prover nodes.
 - **Prover**: Prover nodes are dedicated to solving the Alpha puzzle. They do not participate in consensus or maintain a copy of the ledger.

### 2.2 Requirements

The following are the requirements to run an Alpha node:
 - **OS**: 64-bit architectures only, latest up-to-date for security
    - Clients: Ubuntu 22.04 (LTS), macOS Ventura or later, Windows 11 or later
    - Validators: Ubuntu 22.04 (LTS)
 - **CPU**: 64-bit architectures only, Latest Intel Xeon or Better
    - Clients: 24-cores (32-cores or larger preferred)
    - Validators: 64-cores (128-cores or larger preferred)
 - **RAM**: DDR4 or better
    - Clients: 128GiB of memory (192GiB or larger preferred)
    - Validators: 256GiB of memory (384GiB or larger preferred)
 - **Storage**: PCIe Gen 3 x4, PCIe Gen 4 x2 NVME SSD, or better
    - Clients: 2TB of disk space (4TB or larger preferred)
    - Validators: 4TB of disk space (6TB or larger preferred)
 - **Network**: Symmetric, commercial, always-on
    - Clients: 250Mbps of upload **and** download bandwidth
    - Validators: 500Mbps of upload **and** download bandwidth

No explicit recommendations are made for proving nodes as proving hardware may be highly variable. If interested in running Alpha Provers nodes, please refer to resources published by the Alpha community.

### 2.3 Installation

Before beginning, please ensure your machine has Rust installed, with at least [this version](rust-toolchain). Instructions to [install Rust can be found here.](https://www.rust-lang.org/tools/install)

Start by cloning this GitHub repository:
```
git clone --branch mainnet --single-branch https://github.com/ProvableHQ/deltaos.git
```

Next, move into the `deltaos` directory:
```
cd deltaos
```

**[For Ubuntu users]** A helper script to install dependencies is available. From the `deltaos` directory, run:
```
./build_ubuntu.sh
```

Lastly, install `deltaos`:
```
cargo install --locked --path .
```

#### Optional: CUDA Acceleration for Provers

> This CUDA build is optional. The current deltaos puzzle does not leverage CUDA acceleration—it is a leftover from a previous event, although CUDA may become relevant again with ARC-43.
>
> The CUDA feature is considered unstable and experimental; expect breaking changes.

For prover operators who want to experiment with GPU support:
```
cargo install --locked --path . --features cuda
```

Please ensure ports `4130/tcp` and `3030/tcp` are open on your router and OS firewall.
### 2.4 Port Configuration

#### 2.4.1 For Core Clients

| Port     | Protocol | Allow/Deny | Source                       | Explanation                                                |
|----------|----------|------------|------------------------------|------------------------------------------------------------|
| 4130/tcp | TCP      | Allow      | All IPv4/IPv6 | TCP traffic to peers               |

#### 2.4.2 For Outer Clients

| Port     | Protocol | Allow/Deny | Source                       | Explanation                                                |
|----------|----------|------------|------------------------------|------------------------------------------------------------|
| 3030/tcp | TCP      | Allow      | All IPv4/IPv6                | REST server                                                |
| 4130/tcp | TCP      | Allow      | All IPv4/IPv6 | TCP traffic to peers                |

#### 2.4.3 For Validators

| Port     | Protocol | Allow/Deny | Source                       | Explanation                                                |
|----------|----------|------------|------------------------------|------------------------------------------------------------|
| 4130/tcp | TCP      | Allow      | All IPv4/IPv6 | TCP traffic to peers                |
| 5000/tcp | TCP      | Allow      | Trusted Validator IPs        | TCP traffic between validators for BFT communication       |
| 3000/tcp | TCP      | Allow      | Internal VPC or VPN          | Metrics dashboard, should only be open within an internal VPC or VPN |
| 3030/tcp | TCP      | Deny       | All IPv4/IPv6                | REST server. This should **always** be disabled for validators |
| 9000/tcp | TCP      | Allow      | Internal VPC or VPN          | Metrics export, should only be open within an internal VPC or VPN |
| 9090/tcp | TCP      | Allow      | Internal VPC or VPN          | Prometheus metrics, should only be open within an internal VPC or VPN |

**Note:** Ensure that your open file limit is set to 16,384 or above.
For the recommended setting run:
```
# Increase the open file limit for the current user (replace <username> with your username)
echo "<username> - nofile 65536" | sudo tee -a /etc/security/limits.conf
# Increase the default system open file limit
sudo bash -c 'echo "DefaultLimitNOFILE=65536" >> /etc/systemd/system.conf'
```

## 3. Run an Alpha Node

## 3.1 Run an Alpha Client

Start by following the instructions in the [Build Guide](#2-build-guide).
The guide below provides information on running `core` and `outer` clients (as defined in Section 2.2.) Alpha community members running validators are recommended to run 1-3 `core` clients as their exclusive client peers. This will ensure network traffic from the public internet is verified prior to reaching the validator.

Any client **not** connected directly to a validator can be considered an `outer` client.

### 3.1.1 Run an Alpha Core Client

The following command is recommended when starting a client node that is connected to a validator:
`deltaos start --client --nodisplay --node 0.0.0.0:4130 --peers "validator_ip:4130,core_client_ip_1:4130,core_client_ip_2:4130,core_client_ip3:4130,outer_client_ip_1:4130,..." --verbosity 1 --norest`

To start a core client node, you can also run the following command from the `deltaos` directory:
```
./scripts/run-core-client.sh
```

### 3.1.2 Run an Alpha Outer Client

The following command is recommended when starting a client node that is NOT connected to a validator:
`deltaos start --client --nodisplay --node 0.0.0.0:4130 --peers "core_client_ip_1:4130,core_client_ip_2:4130,core_client_ip3:4130,outer_client_ip_1:4130,..." --verbosity 1 --rest 0.0.0.0:3030`

To start an outer client node, you can also run the following command from the `deltaos` directory:
```
./scripts/run-outer-client.sh
```

Outer clients can be bootstrap clients that serve as accessible entry points for new nodes joining the network with publicly known or static IPs.
For bootstrap clients, we also recommend the use of `--rotate-external-peers` to avoid the bootstrap peerlist from filling up.

## 3.2 Run an Alpha Validator

Start by following the instructions in the [Build Guide](#2-build-guide).

The following command is recommended when starting a validator node:
`deltaos start --validator --nodisplay --bft 0.0.0.0:5000 --node 0.0.0.0:4130 --peers "validator_ip_1:4130,validator_ip_2:4130,...,core_client_ip_1:4130,core_client_ip_2:4130,..." --validators "validator_ip_1:5000,validator_ip_2:5000,..." --verbosity 1 --norest --private-key-file ~/deltaos/privatekey`

Instead of specifying a private key file (`--private-key-file` flag), the private key can also be defined explicitly (`--private-key` flag).

To start a validator, you can also run the following command from the `deltaos` directory:
```
./scripts/run-validator.sh
```

### 3.2.1 Enable Validator Telemetry Metrics (Optional)

Validator telemetry allows you to track participation in consensus. This is optional and can be enabled using the `telemetry` feature flag.

Once enabled, telemetry metrics are available through:

1. Node logs 
2. REST API endpoints
    ``` 
    // GET /{network}/validators/participation
    // GET /{network}/validators/participation?metadata={true}
    ```

You can enable telemetry in one of the following ways:

#### 1. Enable via [installation](#2.3-installation)

Add the `telemetry` feature flag to the installation command.
```
cargo install --locked --path . --features telemetry
```

#### 2. Enable via `./run-validator.sh`

Run the `./scripts/run-validator.sh` script and enable telemetry when prompted:
```
Do you want to enable validator telemetry? (y/n, default: y):
```

## 3.3 Run an Alpha Prover

Start by following the instructions in the [Build Guide](#2-build-guide).

Next, generate an Alpha account address:
```
deltaos account new
```
This will output a new Alpha account in the terminal.

**Please remember to save the account private key and view key.** The following is an example output:
```
 Attention - Remember to store this account private key and view key.

  Private Key  APrivateKey1xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx  <-- Save Me And Use In The Next Step
     View Key  AViewKey1xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx  <-- Save Me
      Address  ax1xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx  <-- Save Me
```

Next, to start a proving node, from the `deltaos` directory, run:
```
./scripts/run-prover.sh
```
When prompted, enter your Alpha private key:
```
Enter the Alpha Prover account private key:
APrivateKey1xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
```

## 4. FAQs

### 1. My node is unable to compile.

- Ensure your machine has Rust installed, with at least [this version](rust-toolchain). Instructions to [install Rust can be found here.](https://www.rust-lang.org/tools/install)
- If large errors appear during compilation, try running `cargo clean`.
- Ensure `deltaos` is started using `./scripts/run-client.sh` or `./scripts/run-prover.sh`.

### 2. My node is unable to connect to peers on the network.

- Ensure ports `4130/tcp` and `3030/tcp` are open on your router and OS firewall.
- Ensure `deltaos` is started using `./scripts/run-client.sh` or `./scripts/run-prover.sh`.

### 3. I can't generate a new address ### 

- Before running the command above (`deltaos account new`) try `source ~/.bashrc`
- Also double-check the spelling of `deltaos`. Note the directory is `/deltaos`, and the command is `deltaos`

### 4. How do I use the CLI to sign and verify a message?

1. Generate an account with `deltaos account new` if you haven't already
2. Sign a message with your private key using `deltaos account sign --raw -m "Message" --private-key-file=<PRIVATE_KEY_FILE>`
3. Verify your signature with `deltaos account verify --raw -m "Message" -s sign1SignatureHere -a ax1YourAccountAddress`

Note, using the `--raw` flag with the command will sign plaintext messages as bytes rather than [Alpha values](https://developer.delta.org/guides/alpha/language#data-types-and-values) such as `1u8` or `100field`.


## 5. Command Line Interface

To run a node with custom settings, refer to the options and flags available in the `deltaos` CLI.

The full list of CLI flags and options can be viewed with `deltaos --help`:
```
deltaos 
The Delta Team <hello@delta.org>

USAGE:
    deltaos [OPTIONS] <SUBCOMMAND>

OPTIONS:
    -h, --help                     Print help information
    -v, --verbosity <VERBOSITY>    Specify the verbosity [options: 0, 1, 2, 3] [default: 2]

SUBCOMMANDS:
    account    Commands to manage Alpha accounts
    clean      Cleans the deltaos node storage
    help       Print this message or the help of the given subcommand(s)
    start      Starts the deltaos node
    update     Update deltaos
```

The following are the options for the `deltaos start` command:
```
USAGE:
    deltaos start [OPTIONS]

OPTIONS:
        --network <NETWORK_ID>                  Specify the network ID of this node [default: 3]
        
        --validator                             Specify this node as a validator
        --prover                                Specify this node as a prover
        --client                                Specify this node as a client
        
        --private-key <PRIVATE_KEY>             Specify the node's account private key
        --private-key-file <PRIVATE_KEY_FILE>   Specify the path to a file containing the node's account private key
        
        --node <IP:PORT>                        Specify the IP address and port for the node server [default: 0.0.0.0:4130]
        --connect <IP:PORT>                     Specify the IP address and port of a peer to connect to
 
        --rest <REST>                           Specify the IP address and port for the REST server [default: 0.0.0.0:3030]
        --norest                                If the flag is set, the node will not initialize the REST server
        
        --nodisplay                             If the flag is set, the node will not render the display
        --verbosity <VERBOSITY_LEVEL>           Specify the verbosity of the node [options: 0, 1, 2, 3] [default: 2]
        --logfile <PATH>                        Specify the path to the file where logs will be stored [default: /tmp/deltaos.log]
        
        --dev <NODE_ID>                         Enables development mode, specify a unique ID for this node
```

## 6. Development Guide

### 6.1 Quick Start

In the first terminal, start the first validator by running:
```
cargo run --release -- start --nodisplay --dev 0 --validator
```
In the second terminal, start the second validator by running:
```
cargo run --release -- start --nodisplay --dev 1 --validator
```
In the third terminal, start the third validator by running:
```
cargo run --release -- start --nodisplay --dev 2 --validator
```
In the fourth terminal, start the fourth validator by running:
```
cargo run --release -- start --nodisplay --dev 3 --validator
```

From here, this procedure can be used to further start-up provers and clients.

### 6.2 Operations

It is important to initialize the nodes starting from `0` and incrementing by `1` for each new node.

The following is a list of options to initialize a node (replace `<NODE_ID>` with a number starting from `0`):
```
cargo run --release -- start --nodisplay --dev <NODE_ID> --validator
cargo run --release -- start --nodisplay --dev <NODE_ID> --prover
cargo run --release -- start --nodisplay --dev <NODE_ID> --client
cargo run --release -- start --nodisplay --dev <NODE_ID>
```

When no node type is specified, the node will default to `--client`.

### 6.3 Local Devnet

#### 6.3.1 Install `tmux`

To run a local devnet with the script, start by installing `tmux`.

<details><summary>macOS</summary>

To install `tmux` on macOS, you can use the `Homebrew` package manager.
If you haven't installed `Homebrew` yet, you can find instructions at [their website](https://brew.sh/).
```bash
# Once Homebrew is installed, run:
brew install tmux
```

</details>

<details><summary>Ubuntu</summary>

On Ubuntu and other Debian-based systems, you can use the `apt` package manager:
```bash
sudo apt update
sudo apt install tmux
```

</details>

<details><summary>Windows</summary>

There are a couple of ways to use `tmux` on Windows:

### Using Windows Subsystem for Linux (WSL)

1. First, install [Windows Subsystem for Linux](https://docs.microsoft.com/en-us/windows/wsl/install).
2. Once WSL is set up and you have a Linux distribution installed (e.g., Ubuntu), open your WSL terminal and install `tmux` as you would on a native Linux system:
```bash
sudo apt update
sudo apt install tmux
```

</details>

#### 6.3.2 Start a Local Devnet

To start a local devnet, run:
```
./scripts/devnet.sh
```
Follow the instructions in the terminal to start the devnet.

#### 6.3.3 View a Local Devnet

#### Switch Nodes (forward)

To toggle to the next node in a local devnet, run:
```
Ctrl+b n
```

#### Switch Nodes (backwards)

To toggle to the previous node in a local devnet, run:
```
Ctrl+b p
```

#### Select a Node (choose-tree)

To select a node in a local devnet, run:
```
Ctrl+b w
```

#### Select a Node (manually)

To select a node manually in a local devnet, run:
```
Ctrl+b :select-window -t {NODE_ID}
```

#### 6.3.4 Stop a Local Devnet

To stop a local devnet, run:
```
Ctrl+b :kill-session
```
Then, press `Enter`.

### Clean Up

To clean up the node storage, run:
```
cargo run --release -- clean --dev <NODE_ID>
```

## 6.4 Feature Flags

By default, the metrics feature is turned on for some internal crates.

* **history** -
  Enables a /history REST endpoint.
* **telemetry** -
  Allows the node to upload telemetry data.
* **cuda** -
  Allows some operations to run on the (NVidia) GPU, instead of on the CPU. See [CUDA acceleration for provers](#optional-cuda-acceleration-for-provers) for install tips and current puzzle status.
* **locktick** -
  This feature turns on code for detecting deadlocks.
* **test_targets** -
  This feature allows the lowering of coinbase and proof targets for testing.

## 6.5 Local backups

The deltaos node implementation uses rocksdb under the hood. By using its native checkpointing mechanism, you can create backups locally and efficiently. The backups leverage hard links on your filesystem, thereby incurring only a marginal amount of extra space. The aim of these local backups is for you to be able to recover quickly in case your node were to halt.

You can find a basic sample script in `scripts/backup.sh` which you can run as a cron-job e.g. every minute. Each run of the script creates a new backup folder with a timestamp postfix. It will ensure a backup is kept which is 1 minute old, 5 minutes old, 1 hour old and 1 day old. In more detail, on each run it will:
- always overwrite the latest backup
- only overwrite the 5 minute backup if it is older than 5 minutes
- only overwrite the 1 hour backup if it is older than 1 hour
- only overwrite the 1 day backup if it is older than 1 day

You may want to change the `NETWORK`, `BASE_DIR`, `ENDPOINT` and `JWT` variables.

## 7. Contributors
Thank you for helping make deltaos better!  
[🧐 What do the emojis mean?](https://allcontributors.org/docs/en/emoji-key)

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      <td align="center" valign="top" width="14.28%"><a href="https://github.com/howardwu"><img src="https://avatars.githubusercontent.com/u/9260812?v=4?s=100" width="100px;" alt="Howard Wu"/><br /><sub><b>Howard Wu</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=howardwu" title="Code">💻</a> <a href="#maintenance-howardwu" title="Maintenance">🚧</a> <a href="#ideas-howardwu" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/ProvableHQ/deltaos/pulls?q=is%3Apr+reviewed-by%3Ahowardwu" title="Reviewed Pull Requests">👀</a></td>
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      <td align="center" valign="top" width="14.28%"><a href="https://github.com/jules"><img src="https://avatars.githubusercontent.com/u/30194392?v=4?s=100" width="100px;" alt="jules"/><br /><sub><b>jules</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=jules" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/daniilr"><img src="https://avatars.githubusercontent.com/u/1212355?v=4?s=100" width="100px;" alt="Daniil"/><br /><sub><b>Daniil</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=daniilr" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/akattis"><img src="https://avatars.githubusercontent.com/u/4978114?v=4?s=100" width="100px;" alt="akattis"/><br /><sub><b>akattis</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=akattis" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/wcannon"><img src="https://avatars.githubusercontent.com/u/910589?v=4?s=100" width="100px;" alt="William Cannon"/><br /><sub><b>William Cannon</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=wcannon" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/wcannon-alpha"><img src="https://avatars.githubusercontent.com/u/93155840?v=4?s=100" width="100px;" alt="wcannon-alpha"/><br /><sub><b>wcannon-alpha</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=wcannon-alpha" title="Code">💻</a></td>
    </tr>
    <tr>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/sadroeck"><img src="https://avatars.githubusercontent.com/u/31270289?v=4?s=100" width="100px;" alt="Sam De Roeck"/><br /><sub><b>Sam De Roeck</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=sadroeck" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/soft2dev"><img src="https://avatars.githubusercontent.com/u/35427355?v=4?s=100" width="100px;" alt="soft2dev"/><br /><sub><b>soft2dev</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=soft2dev" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/amousa11"><img src="https://avatars.githubusercontent.com/u/12452142?v=4?s=100" width="100px;" alt="Ali Mousa"/><br /><sub><b>Ali Mousa</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=amousa11" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://pyk.sh/"><img src="https://avatars.githubusercontent.com/u/2213646?v=4?s=100" width="100px;" alt="pyk"/><br /><sub><b>pyk</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=pyk" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/whalelephant"><img src="https://avatars.githubusercontent.com/u/18553484?v=4?s=100" width="100px;" alt="Belsy"/><br /><sub><b>Belsy</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=whalelephant" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/apruden2008"><img src="https://avatars.githubusercontent.com/u/39969542?v=4?s=100" width="100px;" alt="apruden2008"/><br /><sub><b>apruden2008</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=apruden2008" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://stackoverflow.com/story/fabianoprestes"><img src="https://avatars.githubusercontent.com/u/976612?v=4?s=100" width="100px;" alt="Fabiano Prestes"/><br /><sub><b>Fabiano Prestes</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=zosorock" title="Code">💻</a></td>
    </tr>
    <tr>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/HarukaMa"><img src="https://avatars.githubusercontent.com/u/861659?v=4?s=100" width="100px;" alt="Haruka"/><br /><sub><b>Haruka</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=HarukaMa" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/e4m7he6g"><img src="https://avatars.githubusercontent.com/u/95574065?v=4?s=100" width="100px;" alt="e4m7he6g"/><br /><sub><b>e4m7he6g</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=e4m7he6g" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/w4ll3"><img src="https://avatars.githubusercontent.com/u/8595904?v=4?s=100" width="100px;" alt="Gregório Granado Magalhães"/><br /><sub><b>Gregório Granado Magalhães</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=w4ll3" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://stake.nodes.guru/"><img src="https://avatars.githubusercontent.com/u/44749897?v=4?s=100" width="100px;" alt="Evgeny Garanin"/><br /><sub><b>Evgeny Garanin</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=evgeny-garanin" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/macro-ss"><img src="https://avatars.githubusercontent.com/u/59944291?v=4?s=100" width="100px;" alt="Macro Hoober"/><br /><sub><b>Macro Hoober</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=macro-ss" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/code-pangolin"><img src="https://avatars.githubusercontent.com/u/89436546?v=4?s=100" width="100px;" alt="code-pangolin"/><br /><sub><b>code-pangolin</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=code-pangolin" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/kaola526"><img src="https://avatars.githubusercontent.com/u/88829586?v=4?s=100" width="100px;" alt="kaola526"/><br /><sub><b>kaola526</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=kaola526" title="Code">💻</a></td>
    </tr>
    <tr>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/clarenous"><img src="https://avatars.githubusercontent.com/u/18611530?v=4?s=100" width="100px;" alt="clarenous"/><br /><sub><b>clarenous</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=clarenous" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/unordered-set"><img src="https://avatars.githubusercontent.com/u/78592281?v=4?s=100" width="100px;" alt="Kostyan"/><br /><sub><b>Kostyan</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=unordered-set" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/austinabell"><img src="https://avatars.githubusercontent.com/u/24993711?v=4?s=100" width="100px;" alt="Austin Abell"/><br /><sub><b>Austin Abell</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=austinabell" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/yelhousni"><img src="https://avatars.githubusercontent.com/u/16170090?v=4?s=100" width="100px;" alt="Youssef El Housni"/><br /><sub><b>Youssef El Housni</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=yelhousni" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/ghostant-1017"><img src="https://avatars.githubusercontent.com/u/53888545?v=4?s=100" width="100px;" alt="ghostant-1017"/><br /><sub><b>ghostant-1017</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=ghostant-1017" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://pencil.li/"><img src="https://avatars.githubusercontent.com/u/5947268?v=4?s=100" width="100px;" alt="Miguel Gargallo"/><br /><sub><b>Miguel Gargallo</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=miguelgargallo" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/wang384670111"><img src="https://avatars.githubusercontent.com/u/78151109?v=4?s=100" width="100px;" alt="Chines Wang"/><br /><sub><b>Chines Wang</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=wang384670111" title="Code">💻</a></td>
    </tr>
    <tr>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/ayushgw"><img src="https://avatars.githubusercontent.com/u/14152340?v=4?s=100" width="100px;" alt="Ayush Goswami"/><br /><sub><b>Ayush Goswami</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=ayushgw" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/timsmith1337"><img src="https://avatars.githubusercontent.com/u/77958700?v=4?s=100" width="100px;" alt="Tim - o2Stake"/><br /><sub><b>Tim - o2Stake</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=timsmith1337" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/liusen-adalab"><img src="https://avatars.githubusercontent.com/u/74092505?v=4?s=100" width="100px;" alt="liu-sen"/><br /><sub><b>liu-sen</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=liusen-adalab" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/Pa1amar"><img src="https://avatars.githubusercontent.com/u/20955327?v=4?s=100" width="100px;" alt="Palamar"/><br /><sub><b>Palamar</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=Pa1amar" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/swift-mx"><img src="https://avatars.githubusercontent.com/u/80231732?v=4?s=100" width="100px;" alt="swift-mx"/><br /><sub><b>swift-mx</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=swift-mx" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/dtynn"><img src="https://avatars.githubusercontent.com/u/1426666?v=4?s=100" width="100px;" alt="Caesar Wang"/><br /><sub><b>Caesar Wang</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=dtynn" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/paulip1792"><img src="https://avatars.githubusercontent.com/u/52645166?v=4?s=100" width="100px;" alt="Paul IP"/><br /><sub><b>Paul IP</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=paulip1792" title="Code">💻</a></td>
    </tr>
    <tr>
      <td align="center" valign="top" width="14.28%"><a href="https://philipglazman.com/"><img src="https://avatars.githubusercontent.com/u/8378656?v=4?s=100" width="100px;" alt="Philip Glazman"/><br /><sub><b>Philip Glazman</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=philipglazman" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/Avadon"><img src="https://avatars.githubusercontent.com/u/404177?v=4?s=100" width="100px;" alt="Ruslan Nigmatulin"/><br /><sub><b>Ruslan Nigmatulin</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=Avadon" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://www.garillot.net/"><img src="https://avatars.githubusercontent.com/u/4142?v=4?s=100" width="100px;" alt="François Garillot"/><br /><sub><b>François Garillot</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=huitseeker" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/aolcr"><img src="https://avatars.githubusercontent.com/u/67066732?v=4?s=100" width="100px;" alt="aolcr"/><br /><sub><b>aolcr</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=aolcr" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/zvolin"><img src="https://avatars.githubusercontent.com/u/34972409?v=4?s=100" width="100px;" alt="Maciej Zwoliński"/><br /><sub><b>Maciej Zwoliński</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=zvolin" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://www.linkedin.com/in/ignacio-avecilla-39386a191/"><img src="https://avatars.githubusercontent.com/u/63374472?v=4?s=100" width="100px;" alt="Nacho Avecilla"/><br /><sub><b>Nacho Avecilla</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=IAvecilla" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/Protryon"><img src="https://avatars.githubusercontent.com/u/8600837?v=4?s=100" width="100px;" alt="Max Bruce"/><br /><sub><b>Max Bruce</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=Protryon" title="Code">💻</a></td>
    </tr>
    <tr>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/whalelephant"><img src="https://avatars.githubusercontent.com/u/18553484?v=4?s=100" width="100px;" alt="whalelephant"/><br /><sub><b>Belsy</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=whalelephant" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/tranhoaison"><img src="https://avatars.githubusercontent.com/u/31094102?v=4?s=100" width="100px;" alt="tranhoaison"/><br /><sub><b>Santala</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=tranhoaison" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/web3deadline"><img src="https://avatars.githubusercontent.com/u/89900222?v=4?s=100" width="100px;" alt="web3deadline"/><br /><sub><b>deadline</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=web3deadline" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/CedricYanYuhui"><img src="https://avatars.githubusercontent.com/u/136431832?v=4?s=100" width="100px;" alt="CedricYanYuhui"/><br /><sub><b>CedricYanYuhui</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=CedricYanYuhui" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/craigjson"><img src="https://avatars.githubusercontent.com/u/16459396?v=4?s=100" width="100px;" alt="craigjson"/><br /><sub><b>Craig Johnson</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=craigjson" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/vbar"><img src="https://avatars.githubusercontent.com/u/108574?v=4?s=100" width="100px;" alt="vbar"/><br /><sub><b>Vaclav Barta</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=vbar" title="Code">💻</a></td>
      <td align="center" valign="top" width="14.28%"><a href="https://github.com/features/security"><img src="https://avatars.githubusercontent.com/u/27347476?v=4?s=100" width="100px;" alt="Dependabot"/><br /><sub><b>Dependabot</b></sub></a><br /><a href="https://github.com/ProvableHQ/deltaos/commits?author=dependabot" title="Code">💻</a></td>
    </tr>
  </tbody>
  <tfoot>
    <tr>
      <td align="center" size="13px" colspan="7">
        <img src="https://raw.githubusercontent.com/all-contributors/all-contributors-cli/1b8533af435da9854653492b1327a23a4dbd0a10/assets/logo-small.svg">
          <a href="https://all-contributors.js.org/docs/en/bot/usage">Add your contributions</a>
        </img>
      </td>
    </tr>
  </tfoot>
</table>

<!-- markdownlint-restore -->
<!-- prettier-ignore-end -->

<!-- ALL-CONTRIBUTORS-LIST:END -->

This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind are welcome!

## 8. License

We welcome all contributions to `deltaos`. Please refer to the [license](#7-license) for the terms of contributions.

[![License: GPL v3](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](./LICENSE.md)