In the article we are going to see how to setup a full RPC node for Near blockchain


Setup

sudo apt update && sudo apt upgrade -y
sudo apt install -y curl git unzip clang cmake make pkg-config libssl-dev llvm jq
sudo reboot

Configure system limits

echo "fs.file-max=1000000" | sudo tee -a /etc/sysctl.conf
sudo sysctl -p
ulimit -n 1000000

Install Rust

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source ~/.cargo/env
rustup update stable

Download NEAR Core

git clone https://github.com/near/nearcore.git
cd nearcore
git checkout 2.10.3

Compile

# Option 1
cargo build -p neard --release
sudo cp target/release/neard /usr/local/bin/

# Option 2
cd ~
rm -rf nearcore
wget https://github.com/near/nearcore/releases/latest/download/neard-linux-x86_64.tar.gz
tar -xvf neard-linux-x86_64.tar.gz
sudo mv neard /usr/local/bin/
neard --version

Init node

mkdir -p ~/.near
# Mainnet init
neard init --chain-id mainnet --download-genesis --download-config

# It will create both files:
# ~/.near/config.json
# ~/.near/genesis.json

Configure the Node in full RPC node

vim ~/.near/config.json

-> Activate public RPC
"rpc": {
  "addr": "0.0.0.0:3030",
  "cors_allowed_origins": ["*"]
}

Configure kernel network parameters

cd nearcore
chmod +x scripts/set_kernel_params.sh
sudo scripts/set_kernel_params.sh

Start the node

neard run

Check logs

tail -f ~/.near/logs/neard.log

Check node

curl http://127.0.0.1:3030/status

# expected response:
{
  "chain_id": "mainnet",
  "sync_info": {
    "syncing": false
  }
}

Create a service

sudo vim /etc/systemd/system/neard.service

[Unit]
Description=NEAR RPC Node
After=network.target

[Service]
User=ubuntu
ExecStart=/usr/local/bin/neard run
Restart=always
LimitNOFILE=1000000

[Install]
WantedBy=multi-user.target


sudo systemctl daemon-reload
sudo systemctl enable neard
sudo systemctl start neard

Useful RPC Endpoints

-> Health: http://localhost:3030/status

-> JSON-RPC: http://localhost:3030


Exemple:

curl -X POST http://localhost:3030 \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":"1","method":"block","params":{"finality":"final"}}'