Node Operations on Sei

sudo apt update && sudo apt upgrade -y

sudo apt install make gcc git jq chrony curl lz4 wget tar build-essential -y

sudo timedatectl set-timezone UTC
sudo systemctl enable --now chronyd
timedatectl

# Check for existing Go installations — more than one entry means another copy
# may still win on your PATH after this install
which -a go
go version

# Bumping Go? Change these two lines only
GO_TARBALL=go1.25.6.linux-amd64.tar.gz
GO_SHA256=f022b6aad78e362bcba9b0b94d09ad58c5a70c6ba3b7582905fababf5fe0181a

curl -fLO https://go.dev/dl/${GO_TARBALL}

# Verify integrity before trusting the archive (go.dev/dl publishes a SHA256 per file
# at ${GO_TARBALL}.sha256), then replace any previous installation — extracting over
# one leaves stale files behind
echo "${GO_SHA256}  ${GO_TARBALL}" | sha256sum -c - \
  && sudo rm -rf /usr/local/go \
  && sudo tar -C /usr/local -xzf ${GO_TARBALL}

# Add Go to your environment variables
echo 'export PATH=$PATH:/usr/local/go/bin' >> $HOME/.bashrc
source $HOME/.bashrc

# Verify installation
go version

# Initialize node (default mode is full: RPC/P2P bind to all interfaces)
# --chain-id is required, e.g. pacific-1 or atlantic-2
# For validator nodes, use: seid init <your-moniker> --chain-id <chain-id> --mode validator
seid init <your-moniker> --chain-id <chain-id>

# Genesis is written automatically for known networks (mainnet and testnets); no download needed.

# For known public networks (pacific-1, atlantic-2), seid init also pre-populates
# bootstrap-peers in config.toml with the built-in Sei Labs seed nodes, so peer
# discovery works with no manual configuration. Devnets (arctic-1) and
# unknown/private chains get none, and any bootstrap-peers value you already set
# is never overwritten.

# Optionally configure additional persistent peers in config.toml.
PEERS="<comma-separated-peer-list>"

#Set persistent peers in config.toml
sed -i 's/persistent-peers = .*/persistent-peers = "'$PEERS'"/' ~/.sei/config/config.toml

# Set minimum gas price (recommended; helps prevent spam transactions)
# Mainnet enforces a chain-wide minimum of 0.02usei, so set at least that value
# Use "0usei" only for local development or private networks
sed -i -e "s/^minimum-gas-prices *=.*/minimum-gas-prices = \"0.02usei\"/" $HOME/.sei/config/app.toml

# Tune mempool settings
sed -i \
  -e 's/^keep-invalid-txs-in-cache = .*/keep-invalid-txs-in-cache = true/' \
  -e 's/^ttl-duration = .*/ttl-duration = "5s"/' \
  -e 's/^ttl-num-blocks = .*/ttl-num-blocks = 5/' \
  $HOME/.sei/config/config.toml

# Set Concurrent Workers to 500 and enable occ
sed -i -e "s/^#concurrency-workers *=.*/concurrency-workers = 500/" $HOME/.sei/config/app.toml
sed -i -e "s/^occ-enabled *=.*/occ-enabled = true/" $HOME/.sei/config/app.toml

# Create the systemd service file
sudo tee /etc/systemd/system/seid.service > /dev/null << EOF
[Unit]
Description=Sei Node
After=network-online.target

[Service]
User=$USER
ExecStart=$(which seid) start
Restart=always
RestartSec=3
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target
EOF

# Reload systemd, enable and start the service
sudo systemctl daemon-reload
sudo systemctl enable seid
sudo systemctl start seid

# Check sync status
seid status

# Monitor logs in real-time
journalctl -u seid -f -o cat

# Check validator status (if running a validator)
seid query staking validator $(seid keys show <your_key> --bech val -a)