Node Types

• RPC / full nodes: these nodes are generally used to query data or to interact with the chain. They keep some state, but not all state since genesis. The default settings run an RPC / full node.
• Archive / full nodes: these nodes keep the full state of the chain from genesis. They generally need large disks (at least 10 TB). To enable this type of node, set min-retain-blocks=0 and pruning="nothing" in your app.toml. Also set ss-keep-recent = 0 under [state-store] so that the SeiDB state store keeps every version.
• State sync nodes: these nodes serve snapshot data that other nodes use to bootstrap onto the chain. To enable this type of node, set a non-zero snapshot-interval under [state-sync] in app.toml. The enable=true setting under [statesync] in config.toml does the opposite: it makes a node bootstrap from the snapshots of other nodes.
• Validator nodes: these nodes propose and sign blocks to secure the chain. To enable this type of node, set mode=validator in config.toml. Because Sei uses proof of stake, you must have enough delegation to join the active set.

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Commonly used ports

• 26656: The default port for P2P communication. This port is used to communicate with other nodes. It must be open for the node to join a network.
• 26657: The default port for the RPC interface. This port is used to send queries and transactions, so it must be open to serve queries from seid.
• 1317: The default port for HTTP RESTful requests to the seid API server. Applications and services can use it to interact with the seid instance through RPC.
• 9090: The default port for gRPC communication. This port is used for high-performance communication with the node.
• 8545: The default port for EVM HTTP RPC. This port is used for Ethereum JSON-RPC calls. It must be open if you want to interact with EVM-compatible applications. The frozen-rpc-router binary also listens on 127.0.0.1:8545 by default. If you run the router on the same host as a live node, move one of them to a different port. The linked example keeps the router on 8545 and moves the two co-located nodes to 9545 and 9546.
• 8546: The default port for EVM WebSocket RPC. EVM applications that need WebSocket connections use this port for real-time communication.
• 26660: The default port for the Prometheus database, which you can use to monitor the environment. In the default configuration, this port is not open.

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Systemd file template

[Unit]
Description=Sei Node
After=network.target

[Service]
User=<USER>
Type=simple
ExecStart=<PATH_TO_SEID>/seid start --chain-id <Network>
Restart=always

# wait 30 seconds before restarting the service after it has failed.

RestartSec=30

# wait up to 30 seconds for the service to stop gracefully when it is being stopped.

TimeoutStopSec=30

# send the SIGINT signal (equivalent to pressing Ctrl-C) to the service process when it is being stopped

# giving it a chance to shut down gracefully.

KillSignal=SIGINT
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target