> For the complete documentation index, see [llms.txt](https://cryptomolot.gitbook.io/cryptomolot-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cryptomolot.gitbook.io/cryptomolot-docs/testnets/0g-zero-gravity/0g-da-node.md).

# 0G DA Node

## Resources

| Website | <https://0g.ai/>                                      |
| ------- | ----------------------------------------------------- |
| Github  | <https://github.com/0glabs>                           |
| x.com   | [https://x.com/0G\_labs](https://twitter.com/0G_labs) |
| Discord | <https://discord.com/invite/0glabs>                   |
| Docs    | <https://docs.0g.ai/0g-doc>                           |

## Prerequisite

To operate effectively, your DA signer needs to run a DA node to verify encoded blob data, sign it, and store it for future farming and rewards. Currently, to run a DA Node on Testnet, users must stake 10 OG tokens. These can be obtained through our [faucet](https://faucet.0g.ai/) or via rewards from running Storage Nodes or Validator Nodes. For official deployed contract addresses, visit [this page](https://docs.0g.ai/0g-doc/docs/contract-addresses).

## Hardware requirements

<table data-view="cards"><thead><tr><th>CPU</th><th>RAM</th><th>Storage</th><th>Network</th><th>OS</th></tr></thead><tbody><tr><td>8 cores</td><td>16 GB</td><td>1 TB NVME</td><td>100 MBps</td><td>Linux (Ubuntu 22.04 x64)</td></tr></tbody></table>

## Installation 💾

Install dependencies

```bash
sudo apt-get update && sudo apt-get install clang cmake build-essential pkg-config libssl-dev protobuf-compiler llvm llvm-dev
```

Install GO

```bash
cd $HOME && \
ver="1.23.3" && \
wget "https://golang.org/dl/go$ver.linux-amd64.tar.gz" && \
sudo rm -rf /usr/local/go && \
sudo tar -C /usr/local -xzf "go$ver.linux-amd64.tar.gz" && \
rm "go$ver.linux-amd64.tar.gz" && \
echo "export PATH=$PATH:/usr/local/go/bin:$HOME/go/bin" >> ~/.bash_profile && \
source ~/.bash_profile && \
go version
```

Install Rust

```bash
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
source $HOME/.cargo/env
rustc --version
```

Build binary from source

```bash
git clone -b v1.1.3 https://github.com/0glabs/0g-da-node.git

cd $HOME/0g-da-node
git stash
git fetch --all --tags
git checkout 9845b8b
git submodule update --init
cargo build --release

./dev_support/download_params.sh
```

Generate BLS private key, if you don't have one. It will register the signer information in DA contract when you first run DA node

{% hint style="info" %}
You must back up your BLS key.
{% endhint %}

```bash
cargo run --bin key-gen
```

Edit the configuration file (replace your \<public\_ip/dns>, signer\_bls\_private\_key, signer\_eth\_private\_key, miner\_eth\_private\_key)

```bash
nano $HOME/0g-da-node/config.toml
```

```bash
log_level = "info"

data_path = "./db/"

# path to downloaded params folder
encoder_params_dir = "params/" 

# grpc server listen address
grpc_listen_address = "0.0.0.0:34000"
# chain eth rpc endpoint
eth_rpc_endpoint = "https://evmrpc-testnet.0g.ai"
# public grpc service socket address to register in DA contract
# ip:34000 (keep same port as the grpc listen address)
# or if you have dns, fill your dns
socket_address = "<public_ip/dns>:34000"

# data availability contract to interact with
da_entrance_address = "0xE75A073dA5bb7b0eC622170Fd268f35E675a957B"
# deployed block number of da entrance contract
start_block_number = 326165

# signer BLS private key
signer_bls_private_key = ""
# signer eth account private key
signer_eth_private_key = ""
# miner eth account private key, (could be the same as 'signer_eth_private_key', but not recommended)
miner_eth_private_key = ""

# whether to enable data availability sampling
enable_das = "true"
```

Create a service file

```bash
sudo tee /etc/systemd/system/0gda.service > /dev/null <<EOF
[Unit]
Description=0G-DA Node
After=network.target

[Service]
User=$USER
WorkingDirectory=$HOME/0g-da-node
ExecStart=$HOME/0g-da-node/target/release/server --config $HOME/0g-da-node/config.toml
Restart=always
RestartSec=10
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target
EOF
```

Start the node

```bash
sudo systemctl daemon-reload
sudo systemctl enable 0gda
sudo systemctl start 0gda
```

## Useful commands ⚙️

Stop the node

```bash
sudo systemctl stop zgs
```

Check logs

```bash
sudo journalctl -u 0gda -f -o cat
```

## Delete node 🗑️

```bash
sudo systemctl stop 0gda
sudo systemctl disable 0gda
sudo rm /etc/systemd/system/0gda.service
rm -rf $HOME/0g-da-node
```