Airchains

For Ubuntu 22.04 or later. The node listens on ports starting with your port prefix (e.g. 26657 becomes 19657), so several nodes can share a server.

1. 01Install tools

   sudo apt update && sudo apt upgrade -y
   sudo apt install -y curl git wget jq make gcc build-essential lz4 zstd tmux htop unzip

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2. 02Install Go

   cd $HOME
   VER="<go-version>"
   wget "https://golang.org/dl/go$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"
   [ ! -f $HOME/.bash_profile ] && touch $HOME/.bash_profile
   echo 'export PATH=$PATH:/usr/local/go/bin:$HOME/go/bin' >> $HOME/.bash_profile
   source $HOME/.bash_profile
   mkdir -p $HOME/go/bin
   go version

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3. 03Build the binary

   cd $HOME
   rm -rf junction
   git clone https://github.com/airchains-network/junction.git junction
   cd junction
   git checkout <version>
   make install
   junctiond version --long | grep -E '^(version|commit):'

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4. 04Install Cosmovisor

   go install cosmossdk.io/tools/cosmovisor/cmd/cosmovisor@latest
   DAEMON_HOME=$HOME/.junctiond DAEMON_NAME=junctiond cosmovisor init $HOME/go/bin/junctiond

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5. 05Create the service

   sudo tee /etc/systemd/system/junctiond.service > /dev/null << EOF
   [Unit]
   Description=Airchains node
   After=network-online.target
   
   [Service]
   User=$USER
   ExecStart=$(which cosmovisor) run start
   WorkingDirectory=$HOME/.junctiond
   Restart=on-failure
   RestartSec=10
   LimitNOFILE=65535
   Environment="DAEMON_HOME=$HOME/.junctiond"
   Environment="DAEMON_NAME=junctiond"
   Environment="DAEMON_ALLOW_DOWNLOAD_BINARIES=true"
   Environment="DAEMON_RESTART_AFTER_UPGRADE=true"
   Environment="UNSAFE_SKIP_BACKUP=true"
   Environment="PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$HOME/.junctiond/cosmovisor/current/bin"
   
   [Install]
   WantedBy=multi-user.target
   EOF
   sudo systemctl daemon-reload
   sudo systemctl enable junctiond

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6. 06Set variables

   echo 'export WALLET="wallet"' >> $HOME/.bash_profile
   echo 'export MONIKER="Your-Moniker"' >> $HOME/.bash_profile
   echo 'export AIR_CHAIN_ID="<chain-id>"' >> $HOME/.bash_profile
   echo 'export AIR_PORT="19"' >> $HOME/.bash_profile
   source $HOME/.bash_profile

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7. 07Initialize the node

   junctiond init "$MONIKER" --chain-id $AIR_CHAIN_ID --home $HOME/.junctiond
   junctiond config set client chain-id $AIR_CHAIN_ID
   junctiond config set client keyring-backend os
   junctiond config set client node tcp://localhost:$AIR_PORT657

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8. 08Custom ports

   sed -i.bak -e "s%:1317%:$AIR_PORT317%g;
   s%:8080%:$AIR_PORT080%g;
   s%:9090%:$AIR_PORT090%g;
   s%:9091%:$AIR_PORT091%g;
   s%:8545%:$AIR_PORT545%g;
   s%:8546%:$AIR_PORT546%g" $HOME/.junctiond/config/app.toml
   sed -i.bak -e "s%:26658%:$AIR_PORT658%g;
   s%:26657%:$AIR_PORT657%g;
   s%:6060%:$AIR_PORT060%g;
   s%:26656%:$AIR_PORT656%g;
   s%^external_address = \"\"%external_address = \"$(wget -qO- eth0.me):$AIR_PORT656\"%;
   s%:26660%:$AIR_PORT660%g" $HOME/.junctiond/config/config.toml

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9. 09Genesis and addrbook

   curl -Ls https://airchains2-testnet-services.luckystar.asia/airchains2/genesis.json > $HOME/.junctiond/config/genesis.json

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10. 10Minimum gas price

    sed -i -e "s|^minimum-gas-prices *=.*|minimum-gas-prices = \"0.0025amf\"|" $HOME/.junctiond/config/app.toml

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11. 11Pruning

    sed -i -e "s/^pruning *=.*/pruning = \"custom\"/" $HOME/.junctiond/config/app.toml
    sed -i -e "s/^pruning-keep-recent *=.*/pruning-keep-recent = \"100\"/" $HOME/.junctiond/config/app.toml
    sed -i -e "s/^pruning-interval *=.*/pruning-interval = \"19\"/" $HOME/.junctiond/config/app.toml

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12. 12Disable the indexer

    sed -i -e "s/^indexer *=.*/indexer = \"null\"/" $HOME/.junctiond/config/config.toml

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13. 13Download the snapshot

    curl -L https://airchains2-services.luckystar.asia/airchains2/varanasi-1_latest.tar.lz4 | lz4 -dc | tar -xf - -C $HOME/.junctiond/data
    mkdir -p $HOME/.junctiond/wasm
    curl -L https://airchains2-services.luckystar.asia/airchains2/wasm_varanasi-1_latest.tar.lz4 | lz4 -dc | tar -xf - -C $HOME/.junctiond/wasm

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14. 14Start the node

    sudo systemctl restart junctiond && sudo journalctl -fu junctiond -o cat

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15. 15Check sync

    curl -s localhost:$AIR_PORT657/status | jq .result.sync_info

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