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Updated on December 22, 2022

Teku command line

This reference describes the syntax of the Teku command line interface (CLI) options.

Important

The CLI options are currently under development and may change.

Specifying options

You can specify Teku options:

  • On the command line.

    teku [OPTIONS] [COMMAND]

  • As an environment variable. For each command line option, the equivalent environment variable is:

    • Uppercase.
    • - is replaced by _.
    • Has a TEKU_ prefix.

  • In a YAML configuration file.

If an option is specified in multiple places, the order of priority is command line, environment variable, configuration file.

Using autocomplete

If using Bash or Z shell, you can enable autocomplete support by navigating to the build folder and running:

source teku.autocomplete.sh

Autocomplete allows you to view option suggestions by entering -- and pressing the Tab key twice.

teku --Tab+Tab

Options

builder-endpoint

--builder-endpoint=<URL>

--builder-endpoint=http://127.0.0.1:18550

TEKU_BUILDER_ENDPOINT=http://127.0.0.1:18550

builder-endpoint: "http://127.0.0.1:18550"

Specifies the address for an external builder endpoint.

config-file

--config-file=<FILE>

--config-file=/home/me/me_node/config.yaml

TEKU_CONFIG_FILE=/home/me/me_node/config.yaml

Path to the YAML configuration file. The default is none.

data-base-path, data-path

--data-base-path=<PATH>

--data-base-path=/home/me/me_node

TEKU_DATA_BASE_PATH=/home/me/me_node

data-base-path: "/home/me/me_node"

Path to the Teku data directory. The default directory is OS-dependent:

  • macOS: ~/Library/teku
  • Unix/Linux: $XDG_DATA_HOME/teku if $XDG_DATA_HOME is set; otherwise ~/.local/share/teku
  • Windows: %localappdata%\teku.

The default Docker image location is /root/.local/share/teku.

data-beacon-path

--data-beacon-path=<PATH>

--data-beacon-path=/home/me/me_beacon

TEKU_DATA_BEACON_PATH=/home/me/me_beacon

data-beacon-path: "/home/me/me_beaon"

Path to the beacon node data. The default is <data-base-path>/beacon where <data-base-path> is specified using --data-base-path.

data-storage-archive-frequency

--data-storage-archive-frequency=<NUMBER>

--data-storage-archive-frequency=1028

TEKU_DATA_STORAGE_ARCHIVE_FREQUENCY=1028

data-storage-archive-frequency: 1028

Set the frequency (in slots) at which to store finalized states to disk. The default is 2048.

This option is ignored if --data-storage-mode is not set to archive.

Note

Specifying a larger number of slots as the archive frequency has a potentially higher overhead for retrieving finalized states since more states may need to be regenerated to get to the requested state. Specifying a lower number of slots as the frequency increases the disk space usage.

For example, --data-storage-archive-frequency=1 uses maximum disk space but has the lowest response time for retrieving a finalized state since each slot state is saved, whereas --data-storage-archive-frequency=2048 uses less disk space, but may need to regenerate the state because every 2048th slot state is saved.

data-storage-mode

--data-storage-mode=<STORAGE_MODE>

--data-storage-mode=archive

TEKU_DATA_STORAGE_MODE=archive

data-storage-mode: "archive"

Set the strategy for handling historical chain data. Valid options are:

  • minimal - Stores the minimal required data to follow the chain and run validators. Finalized states and historic blocks are pruned.
  • prune - Stores all blocks, but finalized states are pruned.
  • archive - Stores all blocks and states.

The default is prune.

data-storage-non-canonical-blocks-enabled

--data-storage-non-canonical-blocks-enabled[=<BOOLEAN>]

--data-storage-non-canonical-blocks-enabled=true

TEKU_DATA_STORAGE_NON_CANONICAL_BLOCKS_ENABLED=true

data-storage-non-canonical-blocks-enabled: true

Specify whether to store non-canonical blocks. The default is false.

data-validator-path

--data-validator-path=<PATH>

--data-validator-path=/home/me/me_validator

TEKU_DATA_VALIDATOR_PATH=/home/me/me_validator

data-validator-path: "/home/me/me_validator"

Path to the validator client data. The default is <data-base-path>/validator where <data-base-path> is specified using --data-base-path.

ee-endpoint

--ee-endpoint=<URL>

--ee-endpoint=http://localhost:8550

TEKU_EE_ENDPOINT=http://localhost:8550

ee-endpoint: "http://localhost:8550"

URL of the execution client’s Engine JSON-RPC APIs. This replaces eth1-endpoint after The Merge.

ee-jwt-secret-file

--ee-jwt-secret-file=<FILE>

--ee-jwt-secret-file=ee-jwt-secret.hex

TEKU_EE_JWT_SECRET_FILE=ee-jwt-secret.hex

ee-jwt-secret-file: "ee-jwt-secret.hex"

Shared secret used to authenticate execution clients when using the Engine JSON-RPC API. Contents of file must be 32 hex-encoded bytes. May be a relative or absolute path. See an example of how to generate this.

eth1-deposit-contract-address

--eth1-deposit-contract-address=<ADDRESS>

--eth1-deposit-contract-address=0x77f7bED277449F51505a4C54550B074030d989bC

TEKU_ETH1_DEPOSIT_CONTRACT_ADDRESS=0x77f7bED277449F51505a4C54550B074030d989bC

eth1-deposit-contract-address: "0x77f7bED277449F51505a4C54550B074030d989bC"

The address of the deposit contract. Only required when creating a custom network.

The deposit contract address can also be defined in:

eth1-deposit-contract-max-request-size

--eth1-deposit-contract-max-request-size=<INTEGER>

--eth1-deposit-contract-max-request-size=8000

TEKU_ETH1_DEPOSIT_CONTRACT_MAX_REQUEST_SIZE=8000

eth1-deposit-contract-max-request-size: 8000

The maximum number of blocks to request deposit contract event logs for in a single request. The default is 10000.

Setting a smaller max size may help if your ETH1 node is slow at loading deposit event logs, or when receiving warnings that the ETH1 node is unavailable.

eth1-endpoint, eth1-endpoints

--eth1-endpoint=<URL>[,<URL>...]...

--eth1-endpoint=http://localhost:8545,https://mainnet.infura.io/v3/d0e21ccd0b1e4eef7784422eabc51111

TEKU_ETH1_ENDPOINT=http://localhost:8545,https://mainnet.infura.io/v3/d0e21ccd0b1e4eef7784422eabc51111

eth1-endpoint: ["http://localhost:8545","https://mainnet.infura.io/v3/d0e21ccd0b1e4eef7784422eabc51111"]

Comma-separated list of JSON-RPC URLs of execution layer (Ethereum 1.0) nodes. Each time Teku makes a call, it finds the first provider in the list that is available, on the right chain, and in sync. This option must be specified if running a validator.

If not specified (that is, you’re running a beacon node only), then provide an initial state using the --initial-state option, or start Teku from an existing database using --data-path, which provides the initial state to work from. You do not need to provide an initial state if running a public network which has already started (for example, Mainnet or Goerli).

If using a cloud-based service such as Infura, then set the endpoint to the supplied URL. For example, https://goerli.infura.io/v3/<Project_ID>.

Important

After The Merge, you can’t use eth1-endpoint to specify an external execution layer provider. This option will be replaced by ee-endpoint for each beacon node. You can configure your execution client before The Merge.

genesis-state

--genesis-state=<FILE>

--genesis-state=/home/me/genesis.ssz

TEKU_GENESIS_STATE=/home/me/genesis.ssz

genesis-state: "/home/me/genesis.ssz"

Path or URL to an SSZ-encoded state file. The state file can be used to specify the genesis state, or a recent finalized checkpoint state from which to sync.

This option does not need to be specified if the genesis state is provided by the network specified using the --network option. It also is not required if the Reconstruct Historical States Service is not being utilised.

Note

If overriding the genesis state in a custom network, you must supply the genesis state file at each restart.

Tip

Infura can be used as the source of initial states with --genesis-state https://{projectid}:{secret}@eth2-beacon-mainnet.infura.io/eth/v2/debug/beacon/states/genesis

help

-h, --help

Show the help message and exit.

initial-state

--initial-state=<FILE>

--initial-state=/home/me/genesis.ssz

TEKU_INITIAL_STATE=/home/me/genesis.ssz

initial-state: "/home/me/genesis.ssz"

Path or URL to an SSZ-encoded state file. The state file can be used to specify the genesis state, or a recent finalized checkpoint state from which to sync.

This option does not need to be specified if the genesis state is provided by the network specified using the --network option.

Note

If overriding the initial state in a custom network, you must supply the initial state file at each restart.

Tip

See this community-maintained list of checkpoint state endpoints.

logging

-l, --logging=<LEVEL>

--logging=DEBUG

TEKU_LOGGING=DEBUG

logging: "DEBUG"

Sets the logging verbosity. Log levels are OFF, FATAL, ERROR, WARN, INFO, DEBUG, TRACE, ALL. Default is INFO.

log-color-enabled

--log-color-enabled[=<BOOLEAN>]

--log-color-enabled=false

TEKU_LOG_COLOR_ENABLED=false

log-color-enabled: false

Specify whether status and event log messages include a console color display code. The default is true.

log-destination

--log-destination=<LOG_DESTINATION>

--log-destination=CONSOLE

TEKU_LOG_DESTINATION=CONSOLE

log-destination: "CONSOLE"

Specify where to output log information. Valid options are:

  • BOTH
  • CONSOLE
  • DEFAULT_BOTH
  • FILE

The default is DEFAULT_BOTH. When using BOTH or DEFAULT_BOTH, system updates such as blockchain events are displayed on the console, and errors and other information are logged to a file. Specify the log file with the --log-file command-line option.

For production systems we recommend using the CONSOLE or FILE options to ensure all log information is available in one place.

Note

Use DEFAULT_BOTH when using a custom Log4J2 configuration file. Any other option applies the custom logging changes on top of its default settings.

log-file

--log-file=<FILENAME>

--log-file=teku_2020-01-01.log

TEKU_LOG_FILE=teku_2020-01-01.log

log-file: "teku_2020-01-01.log"

Relative or absolute location, and filename of the log file.

The default directory is OS-dependent:

  • macOS: ~/Library/teku/logs
  • Unix/Linux: $XDG_DATA_HOME/teku/logs if $XDG_DATA_HOME is set; otherwise ~/.local/share/teku/logs
  • Windows: %localappdata%\teku\logs

The default Docker image location is /root/.local/share/teku/logs.

log-file-name-pattern

--log-file-name-pattern=<REGEX>

--log-file-name-pattern=tekuL_%d{yyyy-MM-dd}.log

TEKU_LOG_FILE_NAME_PATTERN=tekuL_%d{yyyy-MM-dd}.log

log-file-name-pattern: "tekuL_%d{yyyy-MM-dd}.log"

Filename pattern to apply when creating log files. The default pattern is teku_%d{yyyy-MM-dd}.log

log-include-events-enabled

--log-include-events-enabled[=<BOOLEAN>]

--log-include-events-enabled=false

TEKU_LOG_INCLUDE_EVENTS_ENABLED=false

log-include-events-enabled: false

Specify whether to log frequent update events. For example every slot event with validators and attestations. The default is true.

log-include-validator-duties-enabled

--log-include-validator-duties-enabled[=<BOOLEAN>]

--log-include-validator-duties-enabled=false

TEKU_LOG_INCLUDE_VALIDATOR_DUTIES_ENABLED=false

log-include-validator-duties-enabled: false

Specify whether to log details of validator event duties. The default is true.

Note

Logs could become noisy when running many validators.

metrics-block-timing-tracking-enabled

--metrics-block-timing-tracking-enabled[=<BOOLEAN>]

--metrics-block-timing-tracking-enabled=false

TEKU_METRICS_BLOCK_TIMING_TRACKING_ENABLED=false

metrics-block-timing-tracking-enabled: false

Enables or disables block timing metrics. The default is true.

metrics-enabled

--metrics-enabled[=<BOOLEAN>]

--metrics-enabled=true

TEKU_METRICS_ENABLED=true

metrics-enabled: true

Set to true to enable the metrics exporter. The default is false.

metrics-host-allowlist

--metrics-host-allowlist=<hostname>[,<hostname>...]... or "*"

--metrics-host-allowlist=medomain.com,meotherdomain.com

TEKU_METRICS_HOST_ALLOWLIST=medomain.com,meotherdomain.com

metrics-host-allowlist: ["medomain.com", "meotherdomain.com"]

A comma-separated list of hostnames to allow access to the Teku metrics. By default, Teku accepts access from localhost and 127.0.0.1.

Tip

To allow all hostnames, use "*". We don’t recommend allowing all hostnames for production environments.

metrics-categories

--metrics-categories=<CATEGORY>[,<CATEGORY>...]...

--metrics-categories=BEACON,JVM,PROCESS

TEKU_METRICS_CATEGORIES=BEACON,JVM,PROCESS

metrics-categories: ["BEACON", "JVM", "PROCESS"]

Categories for which to track metrics. Options are JVM, PROCESS, BEACON, DISCOVERY, EVENTBUS, EXECUTOR, LIBP2P, NETWORK, STORAGE, STORAGE_HOT_DB, STORAGE_FINALIZED_DB, REMOTE_VALIDATOR, VALIDATOR, VALIDATOR_PERFORMANCE. All categories are enabled by default.

metrics-interface

--metrics-interface=<HOST>

--metrics-interface=192.168.10.101

TEKU_METRICS_INTERFACE=192.168.10.101

metrics-interface: "192.168.10.101"

Host on which Prometheus accesses Teku metrics. The default is 127.0.0.1.

metrics-port

--metrics-port=<PORT>

--metrics-port=6174

TEKU_METRICS_PORT=6174

metrics-port: 6174

Specifies the port (TCP) on which Prometheus accesses Teku metrics. The default is 8008.

metrics-publish-endpoint

--metrics-publish-endpoint=<URL>

--metrics-publish-endpoint=https://beaconcha.in/api/v1/client/metrics?apikey={apikey}

TEKU_METRICS_PUBLISH_ENDPOINT=https://beaconcha.in/api/v1/client/metrics?apikey={apikey}

metrics-publish-endpoint: "https://beaconcha.in/api/v1/client/metrics?apikey={apikey}"

Endpoint URL of an external service such as beaconcha.in to which Teku publishes metrics for node monitoring.

metrics-publish-interval

--metrics-publish-interval=<INTEGER>

--metrics-publish-interval=60

TEKU_METRICS_PUBLISH_INTERVAL=60

metrics-publish-interval: "60"

Interval between metric publications to the external service defined in metrics-publish-endpoint, measured in seconds. The default is 60.

network

--network=<NETWORK>

--network=mainnet

TEKU_NETWORK=mainnet

network: "mainnet"

Predefined network configuration. Accepts a predefined network name, or file path or URL to a YAML configuration file. See the consensus specification for examples.

The default is mainnet.

Possible values are:

Network Chain Type Description
mainnet Consensus layer Production Main network
minimal Consensus layer Test Used for local testing and development networks
goerli Consensus layer Test Multi-client testnet
gnosis Consensus layer Production Network for the Gnosis chain
sepolia Consensus layer Test Multi-client testnet

Predefined networks can provide defaults such as the initial state of the network, bootnodes, and the address of the deposit contract.

p2p-advertised-ip

--p2p-advertised-ip=<IP_ADDRESS>

--p2p-advertised-ip=192.168.1.132

TEKU_P2P_ADVERTISED_IP=192.168.1.132

p2p-advertised-ip: "192.168.1.132"

Advertised peer-to-peer IP address. The default is 127.0.0.1.

p2p-enabled

--p2p-enabled[=<BOOLEAN>]

--p2p-enabled=false

TEKU_P2P_ENABLED=false

p2p-enabled: false

Enables or disables all P2P communication. The default is true.

p2p-interface

--p2p-interface=<HOST>

--p2p-interface=192.168.1.132

TEKU_P2P_INTERFACE=192.168.1.132

p2p-interface: "192.168.1.132"

Specifies the network interface on which the node listens for P2P communication. The default is 0.0.0.0 (all interfaces).

p2p-nat-method

--p2p-nat-method=<STRING>

--p2p-nat-method=UPNP

TEKU_P2P_NAT_METHOD=UPNP

p2p-nat-method: "UPNP"

Specify the method for handling NAT environments. Valid options are NONE and UPNP.

The default is NONE, which disables NAT functionality.

Tip

UPnP support is often disabled by default in networking firmware. If disabled by default, explicitly enable UPnP support.

p2p-peer-lower-bound

--p2p-peer-lower-bound=<INTEGER>

--p2p-peer-lower-bound=25

TEKU_P2P_PEER_LOWER_BOUND=25

p2p-peer-lower-bound: 25

Lower bound on the target number of peers. Teku will actively seek new peers if the number of peers falls below this value. The default is 64.

p2p-peer-upper-bound

--p2p-peer-upper-bound=<INTEGER>

--p2p-peer-upper-bound=40

TEKU_P2P_PEER_UPPER_BOUND=40

p2p-peer-upper-bound: 40

Upper bound on the target number of peers. Teku will refuse new peer requests that would cause the number of peers to exceed this value. The default is 100.

p2p-port

--p2p-port=<PORT>

# to listen on port 1789
--p2p-port=1789

# to listen on port 1789
TEKU_P2P_PORT=1789

p2p-port: 1789

Specifies the P2P listening ports (UDP and TCP). The default is 9000.

p2p-discovery-enabled

--p2p-discovery-enabled[=<BOOLEAN>]

--p2p-discovery-enabled=false

TEKU_P2P_DISCOVERY_ENABLED=false

p2p-discovery-enabled: false

Enables or disables P2P peer discovery. If disabled, p2p-static-peers defines the peer connections. The default is true.

p2p-discovery-bootnodes

--p2p-discovery-bootnodes=<ENR_ADDRESS>[,<ENR_ADDRESS>...]...

--p2p-discovery-bootnodes=enr:-Iu4QG...wgiMo,enr:-Iu4QL...wgiMo

TEKU_P2P_DISCOVERY_BOOTNODES=enr:-Iu4QG...wgiMo,enr:-Iu4QL...wgiMo

p2p-discovery-bootnodes: ["enr:-Iu4QG...wgiMo",
                          "enr:-Iu4QL...wgiMo"]

List of comma-separated Ethereum Node Records (ENRs) for P2P discovery bootstrap.

p2p-advertised-port

--p2p-advertised-port=<PORT>

--p2p-advertised-port=1789

TEKU_P2P_ADVERTISED_PORT=1789

p2p-advertised-port: 1789

The advertised P2P port. The default is the port specified in --p2p-port.

The advertised port can differ from the --p2p-port. For example, you can set the advertised port to 9010, and the --p2p-port value to 9009, then manually configure the firewall to forward external incoming requests on port 9010 to port 9009 on the Teku node.

p2p-udp-port

--p2p-udp-port=<PORT>

--p2p-udp-port=1789

TEKU_P2P_UDP_PORT=1789

p2p-udp-port: 1789

The UDP port used for discovery. The default is the port specified in --p2p-port.

p2p-advertised-udp-port

--p2p-advertised-udp-port=<PORT>

--p2p-advertised-udp-port=1789

TEKU_P2P_ADVERTISED_UDP_PORT=1789

p2p-advertised-udp-port: 1789

The advertised UDP port to external peers. The default is the port specified in --p2p-advertised-port if it is set. Otherwise, the default is the port specified in --p2p-port.

p2p-private-key-file

--p2p-private-key-file=<PATH_TO_FILE>

--p2p-private-key-file=/home/me/me_node/key

TEKU_P2P_PRIVATE_KEY_FILE=/home/me/me_node/key

p2p-private-key-file: "/home/me/me_node/key"

File containing the node’s private key.

p2p-static-peers

--p2p-static-peers=<ADDRESS>[,<ADDRESS>...]...

--p2p-static-peers=/ip4/151.150.191.80/tcp/9000/p2p/16Ui...aXRz,/ip4/151.150.191.80/tcp/9000/p2p/16Ui...q6f1

TEKU_P2P_STATIC_PEERS=/ip4/151.150.191.80/tcp/9000/p2p/16Ui...aXRz,/ip4/151.150.191.80/tcp/9000/p2p/16Ui...q6f1

p2p-static-peers: ["/ip4/151.150.191.80/tcp/9000/p2p/16Ui...aXRz",
                   "/ip4/151.150.191.80/tcp/9000/p2p/16Ui...q6f1"]

List of comma-separated multiaddresses of static peers.

p2p-subscribe-all-subnets-enabled

--p2p-subscribe-all-subnets-enabled=<BOOLEAN>

--p2p-subscribe-all-subnets-enabled=true

TEKU_P2P_SUBSCRIBE_ALL_SUBNETS_ENABLED=true

p2p-subscribe-all-subnets-enabled: true

Forces the beacon node to stay subscribed to all subnets regardless of the number of validators. The default is false.

When set to true and running a low number of validators, Teku subscribes and unsubscribes from subnets as needed for the running validators.

This option is primarily for users running an external validator client and load balancing it across multiple beacon nodes. Without this flag, depending on how requests are load balanced, the beacon nodes may not have subscribed to the required subnets and be unable to produce aggregates.

Important

When set to true, Teku uses more CPU and bandwidth, and for most users there’s no need to use this option.

reconstruct-historic-states

--reconstruct-historic-states=<BOOLEAN>

--reconstruct-historic-states=true

TEKU_RECONSTRUCT_HISTORIC_STATES=true

reconstruct-historic-states: true

When set to true the Reconstruct Historical States Service, is enabled where an archive node is able to reconstruct historical states from genesis up to the current checkpoint, running during start up.

When set to false this service is not enabled.

rest-api-cors-origins

--rest-api-cors-origins[=<url>[,<url>...]...] or "*"

--rest-api-cors-origins="http://medomain.com","https://meotherdomain.com"

TEKU_REST_API_CORS_ORIGINS="http://medomain.com","https://meotherdomain.com"

rest-api-cors-origins: ["http://medomain.com","https://meotherdomain.com"]

A list of domain URLs for CORS validation. You must enclose the URLs in double quotes and separate them with commas.

Listed domains can access the node using HTTP REST API calls. If your client interacts with Teku using a browser app (such as a block explorer), add the client domain to the list.

The default is “none.” If you don’t list any domains, browser apps can’t interact with your Teku node.

Tip

For testing and development purposes, use * to accept requests from any domain. We don’t recommend accepting requests from any domain for production environments.

rest-api-docs-enabled

--rest-api-docs-enabled[=<BOOLEAN>]

--rest-api-docs-enabled=true

TEKU_REST_API_DOCS_ENABLED=true

rest-api-docs-enabled: true

Set to true to enable the REST API documentation. The default is false.

The documentation can be accessed at http://<interface>:<port>/swagger-ui where:

rest-api-enabled

--rest-api-enabled[=<BOOLEAN>]

--rest-api-enabled=true

TEKU_REST_API_ENABLED=true

rest-api-enabled: true

Set to true to enable the REST API service. The default is false.

If set to true, then use --rest-api-host-allowlist to limit access to trusted parties.

rest-api-host-allowlist

--rest-api-host-allowlist=<hostname>[,<hostname>...]... or "*"

--rest-api-host-allowlist=medomain.com,meotherdomain.com

TEKU_REST_API_HOST_ALLOWLIST=medomain.com,meotherdomain.com

rest-api-host-allowlist: ["medomain.com", "meotherdomain.com"]

A comma-separated list of hostnames to allow access to the REST API. By default, Teku accepts access from localhost and 127.0.0.1.

Warning

Only trusted parties should access the REST API. Do not directly expose these APIs publicly on production nodes.

We don’t recommend allowing all hostnames ("*") for production environments.

rest-api-interface

--rest-api-interface=<HOST>

# to listen on all interfaces
--rest-api-interface=0.0.0.0

TEKU_REST_API_INTERFACE=0.0.0.0

rest-api-interface: "0.0.0.0"

Specifies the interface on which the REST API listens. The default is 127.0.0.1.

rest-api-port

--rest-api-port=<PORT>

# to listen on port 3435
--rest-api-port=3435

TEKU_REST_API_PORT=3435

rest-api-port: 3435

Specifies REST API listening port (HTTP). The default is 5051.

sentry-config-file

--sentry-config-file=<FILE>

--sentry-config-file=/etc/sentry-node-config.json

TEKU_SENTRY-CONFIG_FILE=/etc/sentry-node-config.json

Path to the sentry node configuration file. The default is none.

Important

This option can’t be used with --beacon-node-api-endpoint.

version

-V, --version

Displays the version and exits.

validator-api-cors-origins

--validator-api-cors-origins="<URL>"[,"<URL>",...] or "*"

--validator-api-cors-origins="http://medomain.com","https://meotherdomain.com"

TEKU_VALIDATOR_API_CORS_ORIGINS="http://medomain.com","https://meotherdomain.com"

validator-api-cors-origins: ["http://medomain.com","https://meotherdomain.com"]

A comma-separated list of domain URLs for CORS validation.

Listed domains can access the node using validator API calls. If your client interacts with Teku using a browser app (such as a block explorer), add the client domain to the list.

The default is “none.” If you don’t list any domains, browser apps can’t interact with your Teku node.

Tip

For testing and development purposes, use * to accept requests from any domain. We don’t recommend accepting requests from any domain for production environments.

validator-api-docs-enabled

--validator-api-docs-enabled[=<BOOLEAN>]

--validator-api-docs-enabled=true

TEKU_VALIDATOR_API_DOCS_ENABLED=true

validator-api-docs-enabled: true

Set to true to enable the validator REST API documentation. The default is false.

When enabling the API documentation endpoint, you must also specify:

validator-api-enabled

--validator-api-enabled[=<BOOLEAN>]

--validator-api-enabled=true

TEKU_VALIDATOR_API_ENABLED=true

validator-api-enabled: true

Set to true to enable the validator client API. The default is false.

If set to true, then use --validator-api-host-allowlist to limit access to trusted parties.

validator-api-host-allowlist

--validator-api-host-allowlist=<hostname>[,<hostname>...]... or "*"

--validator-api-host-allowlist=medomain.com,meotherdomain.com

TEKU_VALIDATOR_API_HOST_ALLOWLIST=medomain.com,meotherdomain.com

validator-api-host-allowlist: ["medomain.com", "meotherdomain.com"]

A comma-separated list of hostnames to allow access to the validator REST API. By default, Teku accepts access from localhost and 127.0.0.1.

Warning

Only trusted parties should access the API. Do not directly expose these APIs publicly on production nodes.

We don’t recommend allowing all hostnames ("*") for production environments.

validator-api-interface

--validator-api-interface=<HOST>

# to listen on all interfaces
--validator-api-interface=0.0.0.0

TEKU_VALIDATOR_API_INTERFACE=0.0.0.0

validator-api-interface: "0.0.0.0"

The interface on which the validator REST API listens. The default is 127.0.0.1.

validator-api-keystore-file

--validator-api-keystore-file=<keystoreFile>

--validator-api-keystore-file=validator_keystorstore.p12

TEKU_VALIDATOR_API_KEYSTORE_FILE=validator_keystore.p12

validator-api-keystore-file: "validator_keystore.p12"

Keystore file for the validator REST API. Teku can use PKCS12 or JKS keystore types. You must create a keystore to enable access.

validator-api-keystore-password-file

--validator-api-keystore-password-file=<keystorePasswordFile>

--validator-api-keystore-password-file=validator_keystore_pass.txt

TEKU_VALIDATOR_API_KEYSTORE_PASSWORD_FILE=validator_keystore_pass.txt

validator-api-keystore-password-file: "validator_keystore_pass.txt"

Password used to decrypt the keystore for the validator REST API.

validator-api-port

--validator-api-port=<PORT>

--validator-api-port=5052

TEKU_VALIDATOR_API_PORT=5052

validator-api-port: 5052

The validator REST API listening port (HTTP). The default is 5052.

validator-keys

--validator-keys=<KEY_DIR>:<PASS_DIR> | <KEY_FILE>:<PASS_FILE>[,<KEY_DIR>:<PASS_DIR> | <KEY_FILE>:<PASS_FILE>...]...

--validator-keys=/home/validator/keys:home/validator/passwords

--validator-keys=/home/validator/keys/validator_217179e.json:/home/validator/passwords/validator_217179e.txt

TEKU_VALIDATOR_KEYS=/home/validator/keys:home/validator/passwords

validator-keys: "/home/validator/keys:home/validator/passwords"

Directory or file to load the encrypted keystore file(s) and associated password file(s) from. Keystore files must use the .json file extension, and password files must use the .txt file extension.

When specifying directories, Teku expects to find identically named keystore and password files. For example validator_217179e.json and validator_217179e.txt.

Tip

You can load new validators without restarting Teku if you specify a directory from which to load the keystore files.

When specifying file names, Teku expects that the files exist.

Note

The path separator is operating system dependent, and should be ; in Windows rather than :.

validators-builder-registration-default-enabled

--validators-builder-registration-default-enabled[=<BOOLEAN>]

--validators-builder-registration-default-enabled=true

TEKU_VALIDATORS_BUILDER_REGISTRATION_DEFAULT_ENABLED=true

validators-builder-registration-default-enabled: true

Set to true to have all validators managed by the validator client register to the builder endpoint when proposing a block.

validators-early-attestations-enabled

--validators-early-attestations-enabled[=<BOOLEAN>]

--validators-early-attestations-enabled=false

TEKU_VALIDATORS_EARLY_ATTESTATIONS_ENABLED=false

validators-early-attestations-enabled: false

Specify whether to use Teku’s built-in early attestation production, which creates an attestation as soon as a block is received. The default is true.

Set this option to false if running a validator client connected to a load balanced beacon node (including most hosted beacon nodes such as Infura), and validator effectiveness is poor.

Note

Delaying attestation production increases the chances of generating a correct attestation when using a load balanced beacon node, but it increases the risk of inclusion delays.

validators-external-signer-keystore

--validators-external-signer-keystore=<FILE>

--validators-external-signer-keystore=teku_client_keystore.p12

TEKU_VALIDATORS_EXTERNAL_KEYSTORE=teku_client_keystore.p12

validators-external-signer-keystore: "teku_client_keystore.p12"

The keystore that Teku presents to the external signer for TLS authentication. Teku can use PKCS12 or JKS keystore types.

Use the PKCS12 keystore type if connecting to Web3Signer.

validators-external-signer-keystore-password-file

--validators-external-signer-keystore-password-file=<FILE>

--validators-external-signer-keystore-password-file=keystore_pass.txt

TEKU_VALIDATORS_EXTERNAL_KEYSTORE_PASSWORD_FILE=keystore_pass.txt

validators-external-signer-keystore-password-file: "keystore_pass.txt"

Password file used to decrypt the keystore.

validators-external-signer-public-keys

--validators-external-signer-public-keys=<KEY>[,<KEY>...]

--validators-external-signer-public-keys=0xa99a...e44c,0xb89b...4a0b

TEKU_VALIDATORS_EXTERNAL_SIGNER_PUBLIC_KEYS=0xa99a...e44c,0xb89b...4a0b

validators-external-signer-public-keys: ["0xa99a...e44c","0xb89b...4a0b"]

List or URL of validator public keys used by an external signer (for example, Web3Signer).

Use the URL of the external signer’s /publicKeys endpoint to load the public keys of all registered validators. For example:

--validators-external-signer-public-keys=http://localhost:9000/api/v1/eth2/publicKeys

Tip

You can load new validators without restarting Teku if you specify a URL from which to load the public keys.

Ensure the external signer is running before starting Teku.

validators-external-signer-slashing-protection-enabled

--validators-external-signer-slashing-protection-enabled[=<BOOLEAN>]

--validators-external-signer-slashing-protection-enabled=false

TEKU_VALIDATORS_EXTERNAL_SIGNER_SLASHING_PROTECTION_ENABLED=false

validators-external-signer-slashing-protection-enabled: false

Specify whether to use Teku’s built-in slashing protection when using an external signer such as Web3Signer. The default is true.

Set this option to false if using the slashing protection implemented by an external signer.

Warning

Ensure the external signer has slashing protection enabled before disabling Teku slashing protection, otherwise a validator may get slashed.

Built-in slashing protection can only be disabled for validators using external signers. Validators using Teku to sign blocks and attestations always uses its built-in slashing protection.

validators-external-signer-timeout

--validators-external-signer-timeout=<INTEGER>

--validators-external-signer-timeout=2000

TEKU_VALIDATORS_EXTERNAL_SIGNER_TIMEOUT=2000

validators-external-signer-timeout: 2000

Timeout in milliseconds for requests to the external signer. The default is 5000.

validators-external-signer-truststore

--validators-external-signer-truststore=<FILE>

--validators-external-signer-truststore=websigner_truststore.p12

TEKU_VALIDATORS_EXTERNAL_TRUSTSTORE=websigner_truststore.p12

validators-external-signer-truststore: "websigner_truststore.p12"

PKCS12 or JKS keystore used to trust external signer’s self-signed certificate or CA certificate which signs the external signer’s certificate.

validators-external-signer-truststore-password-file

--validators-external-signer-truststore-password-file=<FILE>

--validators-external-signer-truststore-password-file=truststore_pass.txt

TEKU_VALIDATORS_EXTERNAL_TRUSTSTORE_PASSWORD_FILE=truststore_pass.txt

validators-external-signer-truststore-password-file: "truststore_pass.txt"

Password file used to decrypt the keystore.

validators-external-signer-url

--validators-external-signer-url=<URL>

--validators-external-signer-url=http://localhost:9000

TEKU_VALIDATORS_EXTERNAL_SIGNER_URL=http://localhost:9000

validators-external-signer-url: "http://localhost:9000"

URL on which the external signer (for example, Web3Signer) is running.

validators-graffiti

--validators-graffiti=<STRING>

--validators-graffiti="Teku validator"

TEKU_VALIDATORS_GRAFFITI="Teku validator"

validators-graffiti: "Teku validator"

Graffiti to add when creating a block. Gets converted to bytes and padded to Bytes32.

The same graffiti is used for all validators started with this beacon node.

--validators-graffiti-file takes precedence if both options are set.

validators-graffiti-file

--validators-graffiti-file=<FILE>

--validators-graffiti-file=/Users/me/mynode/graffiti.txt

TEKU_VALIDATORS_GRAFFITI_FILE=/Users/me/mynode/graffiti.txt

validators-graffiti-file: "/Users/me/mynode/graffiti.txt"

File containing the validator graffiti to add when creating a block. The file contents is converted to bytes and padded to Bytes32. The same graffiti is used for all validators started with this beacon node.

You can overwrite the file while Teku is running to update the graffiti.

This option takes precedence over --validators-graffiti.

validators-keystore-locking-enabled

--validators-keystore-locking-enabled=<BOOLEAN>

--validators-keystore-locking-enabled=true

TEKU_VALIDATORS_KEYSTORE_LOCKING_ENABLED=true

validators-keystore-locking-enabled: true

Locks the keystore files listed in --validator-keys. The default is true.

Attempts to lock all keystores in a directory if a directory is specified in --validator-keys.

validators-performance-tracking-mode

--validators-performance-tracking-mode=<STRING>

--validators-performance-tracking-mode=LOGGING

TEKU_VALIDATORS_PERFORMANCE_TRACKING_MODE=LOGGING

validators-performance-tracking-mode: LOGGING

Set the validator performance tracking strategy. Valid options are LOGGING, METRICS, ALL, and NONE. The default is ALL.

When LOGGING is enabled, attestation and block performance is reported as log messages. When METRICS is enabled, attestation and block performance is reported using metrics in the VALIDATOR_PERFORMANCE metrics category.

validators-proposer-blinded-blocks-enabled

--validators-proposer-blinded-blocks-enabled[=<BOOLEAN>]

--validators-proposer-blinded-blocks-enabled=true

TEKU_VALIDATORS_PROPOSER_BLINDED_BLOCKS_ENABLED=true

validators-proposer-blinded-blocks-enabled: true

Set to true to enable blinded blocks production, a prerequisite for the builder network. When --validators-builder-registration-default-enabled is enabled this option is enabled automatically. The default is false.

validators-proposer-config

--validators-proposer-config=<STRING>

--validators-proposer-config=/home/me/node/proposerConfig.json

TEKU_VALIDATORS_PROPOSER_CONFIG=/home/me/node/proposerConfig.json

validators-proposer-config: "/home/me/node/proposerConfig.json"

Remote URL or local file path to the proposer configuration file.

validators-proposer-config-refresh-enabled

--validators-proposer-config-refresh-enabled[=<BOOLEAN>]

--validators-proposer-config-refresh-enabled=true

TEKU_VALIDATORS_PROPOSER_CONFIG_REFRESH_ENABLED=true

validators-proposer-config-refresh-enabled: true

Set to true to enable reloading the proposer configuration on every proposer preparation (once per epoch). The default is false.

validators-proposer-default-fee-recipient

--validators-proposer-default-fee-recipient=<ADDRESS>

--validators-proposer-default-fee-recipient=0xFE3B557E8Fb62b89F4916B721be55cEb828dBd73

TEKU_VALIDATORS_PROPOSER_DEFAULT_FEE_RECIPIENT=0xFE3B557E8Fb62b89F4916B721be55cEb828dBd73

validators-proposer-default-fee-recipient: "0xFE3B557E8Fb62b89F4916B721be55cEb828dBd73"

Default recipient of transaction fees for all validator keys. When running a validator, this is an alternative to the fee_recipient in the default proposer configuration.

Important

We recommend using this option when running a beacon node serving APIs to other validator clients. The specified fee recipient is used in rare cases when a validator requests a block production but its fee recipient is still unknown for the beacon node.

ws-checkpoint

--ws-checkpoint=<BLOCK_ROOT>:<EPOCH_NUMBER>

--ws-checkpoint=0x5a642bb8f367e98c0d11426d98d28c465f8988fc960500886cb49faf0372883a:3600

TEKU_WS_CHECKPOINT=0x5a642bb8f367e98c0d11426d98d28c465f8988fc960500886cb49faf0372883a:3600

ws-checkpoint: "0x5a642bb8f367e98c0d11426d98d28c465f8988fc960500886cb49faf0372883a:3600"

A recent checkpoint within the weak subjectivity period. Accepts the checkpoint using <blockRoot>:<epochNumber>, where <blockRoot> must start with 0x.

The weak subjectivity checkpoint is a recent, finalized checkpoint on the correct chain. By supplying a weak subjectivity checkpoint, you ensure that nodes that have been offline for a long period follow the correct chain. It protects the node from long-range attacks by malicious actors.

Use the admin weak-subjectivity subcommand to display or clear your weak subjectivity settings.

Questions or feedback? You can discuss issues and obtain free support on Teku Discord channel.