How to join Mun-chain network / Guide to run Node

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Spec Machine

**Recommended configuration:**
- Number of CPUs: 4
- Memory: 16GB
- OS: Ubuntu 22.04 LTS
- Allow all incoming connections from TCP port 26656 and 26657
Static IP address
- The recommended configuration from AWS is the equivalent of a t2.large machine
with 300GB EBS attached storage.

Allow Port

ufw allow 26656
ufw allow 26657
ufw enable

Installing prerequisites

sudo apt update
sudo apt upgrade -y
sudo apt install build-essential jq -y

Install Golang:

Install latest go version https://golang.org/doc/install

wget -q -O - https://raw.githubusercontent.com/canha/golang-tools-install-script/master/goinstall.sh | bash -s -- --version 1.18
source ~/.profile

To verify that Golang installed

go version

// Should return go version go1.18 linux/amd64

Clone repository

git clone https://github.com/munblockchain/mun
cd mun

Install the executables

sudo rm -rf ~/.mun
go mod tidy
make install

clear

mkdir -p ~/.mun/upgrade_manager/upgrades
mkdir -p ~/.mun/upgrade_manager/genesis/bin

Symlink genesis binary to upgrade

cp $(which mund) ~/.mun/upgrade_manager/genesis/bin
sudo cp $(which mund-manager) /usr/bin

Initialize the validator with a moniker name (Example moniker_name: solid-moon-rock)

mund init [moniker_name] --chain-id testmun

Add a new wallet address, store seeds and buy TMUN to it. (Example wallet_name: solid-moon-rock)

mund keys add [wallet_name] --keyring-backend test

Fetch genesis.json from genesis node

curl --tlsv1 https://node1.mun.money/genesis? | jq ".result.genesis" > ~/.mun/config/genesis.json

Update seed in config.toml to make p2p connection

nano ~/.mun/config/config.toml
seeds = "b4eeaf7ca17e5186b181885714cedc6a78d20c9b@167.99.6.48:26656"

Replace stake to TMUN

sed -i 's/stake/utmun/g' ~/.mun/config/genesis.json

Create the service file "/etc/systemd/system/mund.service" with the following content

sudo nano /etc/systemd/system/mund.service

Paste following content(*Please make sure to use correct name of user, group and DAEMON_HOME path at the below.)

[Unit]
Description=mund
Requires=network-online.target
After=network-online.target

[Service]
Restart=on-failure
RestartSec=3
User=root
Group=root
Environment=DAEMON_NAME=mund
Environment=DAEMON_HOME=/root/.mun
Environment=DAEMON_ALLOW_DOWNLOAD_BINARIES=on
Environment=DAEMON_RESTART_AFTER_UPGRADE=on
PermissionsStartOnly=true
ExecStart=/usr/bin/mund-manager start --pruning="nothing" --rpc.laddr "tcp://0.0.0.0:26657"
StandardOutput=file:/var/log/mund/mund.log
StandardError=file:/var/log/mund/mund_error.log
ExecReload=/bin/kill -HUP $MAINPID
KillSignal=SIGTERM
LimitNOFILE=4096

[Install]
WantedBy=multi-user.target

Tips

• How to get user and group name

  whoami
  

• How to get DAEMON_HOME path

  cd ~/.mun
  pwd
  

Create log files and starts running the node

make log-files

sudo systemctl enable mund
sudo systemctl start mund

Verify node is running properly

mund status |& jq

After buying TMUN, stake it to become a validator.

Tips

You should wait until the node gets fully synchronized with other nodes. You can cross check with the genesis node by visiting https://node1.mun.money/status and check the latest block height. You can also check your node status through this link http://[Your_Node_IP]:26657/status.

Or visit https://blockexplorer.mun.money

A transaction to become a validator by staking 50K TMUN

mund tx staking create-validator --from [wallet_name] --moniker [moniker_name] --pubkey $(mund tendermint show-validator) --chain-id testmun --keyring-backend test --amount 50000000000utmun --commission-max-change-rate 0.01 --commission-max-rate 0.2 --commission-rate 0.1 --min-self-delegation 1 --fees 200000utmun --gas auto --gas=auto --gas-adjustment=1.5 -y