Airchains

This manual offers a detailed, step-by-step approach for establishing and operating a full validator node on the Junction.

Website: https://www.airchains.io

Twitter: https://twitter.com/airchains_io

Discord: https://discord.gg/airchains

Faucet on Discord

Services

Explorer: https://explorer.nodesync.top/Airchains-Testnet

API: https://junction-testnet-api.nodesync.top

RPC: https://junction-testnet-rpc.nodesync.top

1. Minimum hardware requirement

2 Cores, 4G Ram, 40G SSD, Ubuntu 22.04

2. Auto Install

Use snapshot:

sudo apt install curl -y && wget https://nodesync.top/Testnet/Junction_auto && chmod +x Junction_auto && ./Junction_auto

2.1 Wallet

Add New Wallet Key - Save seed

junctiond keys add wallet

Recover existing key

junctiond keys add wallet --recover

List All Keys

junctiond keys list

2.2 Query Wallet Balance

junctiond q bank balances $(junctiond keys show wallet -a)

2.3 Check sync status

False is synced

junctiond status 2>&1 | jq .sync_info

2.4 Create Validator

Obtain your validator public key by running the following command:

junctiond comet show-validator

The output will be similar to this (with a different key):

{"@type":"/cosmos.crypto.ed25519.PubKey","key":"lR1d7YBVK5jYijOfWVKRFoWCsS4dg3kagT7LB9GnG8I="}

Then, create a file named `validator.json` with the following content:

nano $HOME/validator.json

Change your info, from "pubkey" to "details" and Save them

{
	"pubkey": {"@type":"/cosmos.crypto.ed25519.PubKey","key":"lR1d7YBVK5jYijOfWVKRFoWCsS4dg3kagT7LB9GnG8I="},
	"amount": "1000000amf",
	"moniker": "<validator-name>",
	"identity": "optional identity signature (ex. UPort or Keybase)",
	"website": "validator's (optional) website",
	"security": "validator's (optional) security contact email",
	"details": "validator's (optional) details",
	"commission-rate": "0.1",
	"commission-max-rate": "0.2",
	"commission-max-change-rate": "0.01",
	"min-self-delegation": "1"
}

Finally, we're ready to submit the transaction to create the validator:

junctiond tx staking create-validator validator.json --from wallet --chain-id junction --fees 5000amf -y

2.5 Delegate Token to your own validator

junctiond tx staking delegate $(junctiond keys show wallet --bech val -a)  1000000amf \
--from wallet --chain-id junction \
--fees 5000amf \
-y

2.6 Withdraw rewards and commission from your validator

junctiond tx distribution withdraw-rewards $(junctiond keys show wallet --bech val -a) \
--from wallet --chain-id junction \
--fees 5000amf \
-y

2.7 Unjail validator

junctiond tx slashing unjail --from wallet --chain-id junction --fees 5000amf -y

2.8 Services Management

# Reload Service
sudo systemctl daemon-reload

# Enable Service
sudo systemctl enable junctiond

# Disable Service
sudo systemctl disable junctiond

# Start Service
sudo systemctl start junctiond

# Stop Service
sudo systemctl stop junctiond

# Restart Service
sudo systemctl restart junctiond

# Check Service Status
sudo systemctl status junctiond

# Check Service Logs
sudo journalctl -u junctiond -f --no-hostname -o cat

3. Backup Validator

Important

cat $HOME/.junction/config/priv_validator_key.json

4. Remove node

sudo systemctl stop junctiond
sudo systemctl disable junctiond
rm -rf /etc/systemd/system/junctiond.service
sudo systemctl daemon-reload
sudo rm -f /usr/local/bin/junctiond
sudo rm -f $(which junctiond)
sudo rm -rf $HOME/.junction
sudo rm -rf Junction_auto

5. Snapshot

sudo systemctl stop junctiond
cp $HOME/.junction/data/priv_validator_state.json $HOME/.junction/priv_validator_state.json.backup
rm -rf $HOME/.junction/data $HOME/.junction/wasmPath

curl https://files.nodesync.top/Junction/junction.tar.lz4 | lz4 -dc - | tar -xf - -C $HOME/.junction

mv $HOME/.junction/priv_validator_state.json.backup $HOME/.junction/data/priv_validator_state.json

sudo systemctl restart junctiond && sudo journalctl -u junctiond -f --no-hostname -o cat

6. State Sync

sudo systemctl stop junctiond

cp $HOME/.junction/data/priv_validator_state.json $HOME/.junction/priv_validator_state.json.backup
junctiond tendermint unsafe-reset-all --home $HOME/.junction

peers="[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:56256,[email protected]:26656,[email protected]:26656,[email protected]:56256,[email protected]:26656,[email protected]:32656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26666,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:17656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:47656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656,[email protected]:26656"

SNAP_RPC="https://junction-testnet-rpc.nodesync.top:443"

sed -i.bak -e "s/^persistent_peers *=.*/persistent_peers = \"$peers\"/" $HOME/.junction/config/config.toml 

LATEST_HEIGHT=$(curl -s $SNAP_RPC/block | jq -r .result.block.header.height);
BLOCK_HEIGHT=$((LATEST_HEIGHT - 1000));
TRUST_HASH=$(curl -s "$SNAP_RPC/block?height=$BLOCK_HEIGHT" | jq -r .result.block_id.hash) 

echo $LATEST_HEIGHT $BLOCK_HEIGHT $TRUST_HASH && sleep 2

sed -i.bak -E "s|^(enable[[:space:]]+=[[:space:]]+).*$|\1true| ;
s|^(rpc_servers[[:space:]]+=[[:space:]]+).*$|\1\"$SNAP_RPC,$SNAP_RPC\"| ;
s|^(trust_height[[:space:]]+=[[:space:]]+).*$|\1$BLOCK_HEIGHT| ;
s|^(trust_hash[[:space:]]+=[[:space:]]+).*$|\1\"$TRUST_HASH\"| ;
s|^(seeds[[:space:]]+=[[:space:]]+).*$|\1\"\"|" $HOME/.junction/config/config.toml

mv $HOME/.junction/priv_validator_state.json.backup $HOME/.junction/data/priv_validator_state.json

sudo systemctl restart junctiond && sudo journalctl -u junctiond -f --no-hostname -o cat

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