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lighthouse beacon node
3.0.0
lighthouse-beacon_node 3.0.0 Sigma Prime <[email protected]> The primary component which connects to the Ethereum 2.0 P2P network and downloads, verifies and stores blocks. Provides a HTTP API for querying the beacon chain and publishing messages to the network.
USAGE:
lighthouse beacon_node [FLAGS] [OPTIONS]
FLAGS:
--builder-fallback-disable-checks This flag disables all checks related to chain health. This means the
builder API will always be used for payload construction, regardless of
recent chain conditions.
--compact-db If present, apply compaction to the database on start-up. Use with caution.
It is generally not recommended unless auto-compaction is disabled.
--disable-discovery Disables the discv5 discovery protocol. The node will not search for new
peers or participate in the discovery protocol.
-x, --disable-enr-auto-update Discovery automatically updates the nodes local ENR with an external IP
address and port as seen by other peers on the network. This disables this
feature, fixing the ENR's IP/PORT to those specified on boot.
--disable-lock-timeouts Disable the timeouts applied to some internal locks by default. This can
lead to less spurious failures on slow hardware but is considered
experimental as it may obscure performance issues.
--disable-malloc-tuning If present, do not configure the system allocator. Providing this flag will
generally increase memory usage, it should only be provided when debugging
specific memory allocation issues.
--disable-packet-filter Disables the discovery packet filter. Useful for testing in smaller
networks
--disable-upnp Disables UPnP support. Setting this will prevent Lighthouse from attempting
to automatically establish external port mappings.
--dummy-eth1 If present, uses an eth1 backend that generates static dummy data.Identical
to the method used at the 2019 Canada interop.
--enable-private-discovery Lighthouse by default does not discover private IP addresses. Set this flag
to enable connection attempts to local addresses.
-e, --enr-match Sets the local ENR IP address and port to match those set for lighthouse.
Specifically, the IP address will be the value of --listen-address and the
UDP port will be --discovery-port.
--eth1 If present the node will connect to an eth1 node. This is required for
block production, you must use this flag if you wish to serve a validator.
--eth1-purge-cache Purges the eth1 block and deposit caches
-h, --help Prints help information
--http Enable the RESTful HTTP API server. Disabled by default.
--http-allow-sync-stalled Forces the HTTP to indicate that the node is synced when sync is actually
stalled. This is useful for very small testnets. TESTING ONLY. DO NOT USE
ON MAINNET.
--http-enable-tls Serves the RESTful HTTP API server over TLS. This feature is currently
experimental.
--import-all-attestations Import and aggregate all attestations, regardless of validator
subscriptions. This will only import attestations from already-subscribed
subnets, use with --subscribe-all-subnets to ensure all attestations are
received for import.
--logfile-compress If present, compress old log files. This can help reduce the space needed
to store old logs.
--merge Deprecated. The feature activates automatically when --execution-endpoint
is supplied.
--metrics Enable the Prometheus metrics HTTP server. Disabled by default.
--private Prevents sending various client identification information.
--purge-db If present, the chain database will be deleted. Use with caution.
--reconstruct-historic-states After a checkpoint sync, reconstruct historic states in the database.
--shutdown-after-sync Shutdown beacon node as soon as sync is completed. Backfill sync will not
be performed before shutdown.
--slasher Run a slasher alongside the beacon node. It is currently only recommended
for expert users because of the immaturity of the slasher UX and the extra
resources required.
--slasher-broadcast Broadcast slashings found by the slasher to the rest of the network
[disabled by default].
--staking Standard option for a staking beacon node. Equivalent to `lighthouse bn
--http --eth1 `. This will enable the http server on localhost:5052 and try
connecting to an eth1 node on localhost:8545
--subscribe-all-subnets Subscribe to all subnets regardless of validator count. This will also
advertise the beacon node as being long-lived subscribed to all subnets.
--validator-monitor-auto Enables the automatic detection and monitoring of validators connected to
the HTTP API and using the subnet subscription endpoint. This generally has
the effect of providing additional logging and metrics for locally
controlled validators.
-V, --version Prints version information
-z, --zero-ports Sets all listening TCP/UDP ports to 0, allowing the OS to choose some
arbitrary free ports.
OPTIONS:
--auto-compact-db <auto-compact-db>
Enable or disable automatic compaction of the database on finalization. [default: true]
--block-cache-size <SIZE>
Specifies how many blocks the database should cache in memory [default: 5]
--boot-nodes <ENR/MULTIADDR LIST>
One or more comma-delimited base64-encoded ENR's to bootstrap the p2p network. Multiaddr is also supported.
--builder <builder> The URL of a service compatible with the MEV-boost API.
--builder-fallback-epochs-since-finalization <builder-fallback-epochs-since-finalization>
If this node is proposing a block and the chain has not finalized within this number of epochs, it will NOT
query any connected builders, and will use the local execution engine for payload construction. Setting this
value to anything less than 2 will cause the node to NEVER query connected builders. Setting it to 2 will
cause this condition to be hit if there are skips slots at the start of an epoch, right before this node is
set to propose. [default: 3]
--builder-fallback-skips <builder-fallback-skips>
If this node is proposing a block and has seen this number of skip slots on the canonical chain in a row, it
will NOT query any connected builders, and will use the local execution engine for payload construction.
[default: 3]
--builder-fallback-skips-per-epoch <builder-fallback-skips-per-epoch>
If this node is proposing a block and has seen this number of skip slots on the canonical chain in the past
`SLOTS_PER_EPOCH`, it will NOT query any connected builders, and will use the local execution engine for
payload construction. [default: 8]
--checkpoint-block <BLOCK_SSZ>
Set a checkpoint block to start syncing from. Must be aligned and match --checkpoint-state. Using
--checkpoint-sync-url instead is recommended.
--checkpoint-state <STATE_SSZ>
Set a checkpoint state to start syncing from. Must be aligned and match --checkpoint-block. Using
--checkpoint-sync-url instead is recommended.
--checkpoint-sync-url <BEACON_NODE>
Set the remote beacon node HTTP endpoint to use for checkpoint sync.
-d, --datadir <DIR>
Used to specify a custom root data directory for lighthouse keys and databases. Defaults to
$HOME/.lighthouse/{network} where network is the value of the `network` flag Note: Users should specify
separate custom datadirs for different networks.
--debug-level <LEVEL>
Specifies the verbosity level used when emitting logs to the terminal. [default: info] [possible values:
info, debug, trace, warn, error, crit]
--discovery-port <PORT>
The UDP port that discovery will listen on. Defaults to `port`
--enr-address <ADDRESS>
The IP address/ DNS address to broadcast to other peers on how to reach this node. If a DNS address is
provided, the enr-address is set to the IP address it resolves to and does not auto-update based on PONG
responses in discovery. Set this only if you are sure other nodes can connect to your local node on this
address. Discovery will automatically find your external address, if possible.
--enr-tcp-port <PORT>
The TCP port of the local ENR. Set this only if you are sure other nodes can connect to your local node on
this port.The --port flag is used if this is not set.
--enr-udp-port <PORT>
The UDP port of the local ENR. Set this only if you are sure other nodes can connect to your local node on
this port.
--eth1-blocks-per-log-query <BLOCKS>
Specifies the number of blocks that a deposit log query should span. This will reduce the size of responses
from the Eth1 endpoint. [default: 1000]
--eth1-cache-follow-distance <BLOCKS>
Specifies the distance between the Eth1 chain head and the last block which should be imported into the
cache. Setting this value lower can help compensate for irregular Proof-of-Work block times, but setting it
too low can make the node vulnerable to re-orgs.
--eth1-endpoint <HTTP-ENDPOINT>
Deprecated. Use --eth1-endpoints.
--eth1-endpoints <HTTP-ENDPOINTS>
One or more comma-delimited server endpoints for web3 connection. If multiple endpoints are given the
endpoints are used as fallback in the given order. Also enables the --eth1 flag. Defaults to
http://127.0.0.1:8545.
--execution-endpoint <EXECUTION-ENDPOINT>
Server endpoint for an execution layer jwt authenticated HTTP JSON-RPC connection. Uses the same endpoint to
populate the deposit cache. Also enables the --merge flag.If not provided, uses the default value of
http://127.0.0.1:8551
--execution-jwt <EXECUTION-JWT>
File path which contains the hex-encoded JWT secret for the execution endpoint provided in the --execution-
endpoint flag.
--execution-jwt-id <EXECUTION-JWT-ID>
Used by the beacon node to communicate a unique identifier to execution nodes during JWT authentication. It
corresponds to the 'id' field in the JWT claims object.Set to empty by default
--execution-jwt-version <EXECUTION-JWT-VERSION>
Used by the beacon node to communicate a client version to execution nodes during JWT authentication. It
corresponds to the 'clv' field in the JWT claims object.Set to empty by default
--fork-choice-before-proposal-timeout <fork-choice-before-proposal-timeout>
Set the maximum number of milliseconds to wait for fork choice before proposing a block. You can prevent
waiting at all by setting the timeout to 0, however you risk proposing atop the wrong parent block.
[default: 250]
--freezer-dir <DIR>
Data directory for the freezer database.
--graffiti <GRAFFITI>
Specify your custom graffiti to be included in blocks. Defaults to the current version and commit, truncated
to fit in 32 bytes.
--http-address <ADDRESS>
Set the listen address for the RESTful HTTP API server. [default: 127.0.0.1]
--http-allow-origin <ORIGIN>
Set the value of the Access-Control-Allow-Origin response HTTP header. Use * to allow any origin (not
recommended in production). If no value is supplied, the CORS allowed origin is set to the listen address of
this server (e.g., http://localhost:5052).
--http-port <PORT>
Set the listen TCP port for the RESTful HTTP API server. [default: 5052]
--http-spec-fork <http-spec-fork>
Serve the spec for a specific hard fork on /eth/v1/config/spec. It should not be necessary to set this flag.
--http-tls-cert <http-tls-cert>
The path of the certificate to be used when serving the HTTP API server over TLS.
--http-tls-key <http-tls-key>
The path of the private key to be used when serving the HTTP API server over TLS. Must not be password-
protected.
--libp2p-addresses <MULTIADDR>
One or more comma-delimited multiaddrs to manually connect to a libp2p peer without an ENR.
--listen-address <ADDRESS>
The address lighthouse will listen for UDP and TCP connections. [default: 0.0.0.0]
--log-format <FORMAT>
Specifies the log format used when emitting logs to the terminal. [possible values: JSON]
--logfile <FILE>
File path where the log file will be stored. Once it grows to the value specified in `--logfile-max-size` a
new log file is generated where future logs are stored. Once the number of log files exceeds the value
specified in `--logfile-max-number` the oldest log file will be overwritten.
--logfile-debug-level <LEVEL>
The verbosity level used when emitting logs to the log file. [default: debug] [possible values: info,
debug, trace, warn, error, crit]
--logfile-max-number <COUNT>
The maximum number of log files that will be stored. If set to 0, background file logging is disabled.
[default: 5]
--logfile-max-size <SIZE>
The maximum size (in MB) each log file can grow to before rotating. If set to 0, background file logging is
disabled. [default: 200]
--max-skip-slots <NUM_SLOTS>
Refuse to skip more than this many slots when processing a block or attestation. This prevents nodes on
minority forks from wasting our time and disk space, but could also cause unnecessary consensus failures, so
is disabled by default.
--metrics-address <ADDRESS>
Set the listen address for the Prometheus metrics HTTP server. [default: 127.0.0.1]
--metrics-allow-origin <ORIGIN>
Set the value of the Access-Control-Allow-Origin response HTTP header. Use * to allow any origin (not
recommended in production). If no value is supplied, the CORS allowed origin is set to the listen address of
this server (e.g., http://localhost:5054).
--metrics-port <PORT>
Set the listen TCP port for the Prometheus metrics HTTP server. [default: 5054]
--monitoring-endpoint <ADDRESS>
Enables the monitoring service for sending system metrics to a remote endpoint. This can be used to monitor
your setup on certain services (e.g. beaconcha.in). This flag sets the endpoint where the beacon node
metrics will be sent. Note: This will send information to a remote sever which may identify and associate
your validators, IP address and other personal information. Always use a HTTPS connection and never provide
an untrusted URL.
--network <network>
Name of the Eth2 chain Lighthouse will sync and follow. [possible values: mainnet, prater, goerli, gnosis,
kiln, ropsten, sepolia]
--network-dir <DIR>
Data directory for network keys. Defaults to network/ inside the beacon node dir.
--port <PORT>
The TCP/UDP port to listen on. The UDP port can be modified by the --discovery-port flag. [default: 9000]
--safe-slots-to-import-optimistically <INTEGER>
Used to coordinate manual overrides of the SAFE_SLOTS_TO_IMPORT_OPTIMISTICALLY parameter. This flag should
only be used if the user has a clear understanding that the broad Ethereum community has elected to override
this parameter in the event of an attack at the PoS transition block. Incorrect use of this flag can cause
your node to possibly accept an invalid chain or sync more slowly. Be extremely careful with this flag.
--slasher-att-cache-size <COUNT>
Set the maximum number of attestation roots for the slasher to cache
--slasher-backend <slasher-backend>
Set the database backend to be used by the slasher. [possible values: mdbx, disabled]
--slasher-chunk-size <EPOCHS>
Number of epochs per validator per chunk stored on disk.
--slasher-dir <PATH>
Set the slasher's database directory.
--slasher-history-length <EPOCHS>
Configure how many epochs of history the slasher keeps. Immutable after initialization.
--slasher-max-db-size <GIGABYTES>
Maximum size of the MDBX database used by the slasher.
--slasher-slot-offset <SECONDS>
Set the delay from the start of the slot at which the slasher should ingest attestations. Only effective if
the slasher-update-period is a multiple of the slot duration.
--slasher-update-period <SECONDS>
Configure how often the slasher runs batch processing.
--slasher-validator-chunk-size <NUM_VALIDATORS>
Number of validators per chunk stored on disk.
--slots-per-restore-point <SLOT_COUNT>
Specifies how often a freezer DB restore point should be stored. Cannot be changed after initialization.
[default: 8192 (mainnet) or 64 (minimal)]
-s, --spec <DEPRECATED>
This flag is deprecated, it will be disallowed in a future release. This value is now derived from the
--network or --testnet-dir flags.
--suggested-fee-recipient <SUGGESTED-FEE-RECIPIENT>
Once the merge has happened, this address will receive transaction fees collected from any blocks produced
by this node. Defaults to a junk address whilst the merge is in development stages. THE DEFAULT VALUE WILL
BE REMOVED BEFORE THE MERGE ENTERS PRODUCTION
--target-peers <target-peers>
The target number of peers. [default: 80]
--terminal-block-hash-epoch-override <EPOCH>
Used to coordinate manual overrides to the TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH parameter. This flag should
only be used if the user has a clear understanding that the broad Ethereum community has elected to override
the terminal PoW block. Incorrect use of this flag will cause your node to experience a consensus
failure. Be extremely careful with this flag.
--terminal-block-hash-override <TERMINAL_BLOCK_HASH>
Used to coordinate manual overrides to the TERMINAL_BLOCK_HASH parameter. This flag should only be used if
the user has a clear understanding that the broad Ethereum community has elected to override the terminal
PoW block. Incorrect use of this flag will cause your node to experience a consensus
failure. Be extremely careful with this flag.
--terminal-total-difficulty-override <INTEGER>
Used to coordinate manual overrides to the TERMINAL_TOTAL_DIFFICULTY parameter. Accepts a 256-bit decimal
integer (not a hex value). This flag should only be used if the user has a clear understanding that the
broad Ethereum community has elected to override the terminal difficulty. Incorrect use of this flag will
cause your node to experience a consensus
failure. Be extremely careful with this flag.
-t, --testnet-dir <DIR>
Path to directory containing eth2_testnet specs. Defaults to a hard-coded Lighthouse testnet. Only effective
if there is no existing database.
--trusted-peers <TRUSTED_PEERS>
One or more comma-delimited trusted peer ids which always have the highest score according to the peer
scoring system.
--validator-monitor-file <PATH>
As per --validator-monitor-pubkeys, but the comma-separated list is contained within a file at the given
path.
--validator-monitor-pubkeys <PUBKEYS>
A comma-separated list of 0x-prefixed validator public keys. These validators will receive special
monitoring and additional logging.
--wss-checkpoint <WSS_CHECKPOINT>
Specify a weak subjectivity checkpoint in `block_root:epoch` format to verify the node's sync against. The
block root should be 0x-prefixed. Note that this flag is for verification only, to perform a checkpoint sync
from a recent state use --checkpoint-sync-url.
2.4.0
lighthouse-beacon_node 2.4.0 Sigma Prime <[email protected]> The primary component which connects to the Ethereum 2.0 P2P network and downloads, verifies and stores blocks. Provides a HTTP API for querying the beacon chain and publishing messages to the network.
USAGE:
lighthouse beacon_node [FLAGS] [OPTIONS]
FLAGS:
--compact-db If present, apply compaction to the database on start-up. Use with caution. It
is generally not recommended unless auto-compaction is disabled.
--disable-discovery Disables the discv5 discovery protocol. The node will not search for new peers
or participate in the discovery protocol.
-x, --disable-enr-auto-update Discovery automatically updates the nodes local ENR with an external IP address
and port as seen by other peers on the network. This disables this feature,
fixing the ENR's IP/PORT to those specified on boot.
--disable-lock-timeouts Disable the timeouts applied to some internal locks by default. This can lead
to less spurious failures on slow hardware but is considered experimental as it
may obscure performance issues.
--disable-malloc-tuning If present, do not configure the system allocator. Providing this flag will
generally increase memory usage, it should only be provided when debugging
specific memory allocation issues.
--disable-packet-filter Disables the discovery packet filter. Useful for testing in smaller networks
--disable-upnp Disables UPnP support. Setting this will prevent Lighthouse from attempting to
automatically establish external port mappings.
--dummy-eth1 If present, uses an eth1 backend that generates static dummy data.Identical to
the method used at the 2019 Canada interop.
--enable-private-discovery Lighthouse by default does not discover private IP addresses. Set this flag to
enable connection attempts to local addresses.
-e, --enr-match Sets the local ENR IP address and port to match those set for lighthouse.
Specifically, the IP address will be the value of --listen-address and the UDP
port will be --discovery-port.
--eth1 If present the node will connect to an eth1 node. This is required for block
production, you must use this flag if you wish to serve a validator.
--eth1-purge-cache Purges the eth1 block and deposit caches
-h, --help Prints help information
--http Enable the RESTful HTTP API server. Disabled by default.
--http-allow-sync-stalled Forces the HTTP to indicate that the node is synced when sync is actually
stalled. This is useful for very small testnets. TESTING ONLY. DO NOT USE ON
MAINNET.
--http-disable-legacy-spec Disable serving of legacy data on the /config/spec endpoint. May be disabled by
default in a future release.
--http-enable-tls Serves the RESTful HTTP API server over TLS. This feature is currently
experimental.
--import-all-attestations Import and aggregate all attestations, regardless of validator subscriptions.
This will only import attestations from already-subscribed subnets, use with
--subscribe-all-subnets to ensure all attestations are received for import.
--logfile-compress If present, compress old log files. This can help reduce the space needed to
store old logs.
--merge Deprecated. The feature activates automatically when --execution-endpoint is
supplied.
--metrics Enable the Prometheus metrics HTTP server. Disabled by default.
--private Prevents sending various client identification information.
--purge-db If present, the chain database will be deleted. Use with caution.
--reconstruct-historic-states After a checkpoint sync, reconstruct historic states in the database.
--shutdown-after-sync Shutdown beacon node as soon as sync is completed. Backfill sync will not be
performed before shutdown.
--slasher Run a slasher alongside the beacon node. It is currently only recommended for
expert users because of the immaturity of the slasher UX and the extra
resources required.
--slasher-broadcast Broadcast slashings found by the slasher to the rest of the network [disabled
by default].
--staking Standard option for a staking beacon node. Equivalent to `lighthouse bn --http
--eth1 `. This will enable the http server on localhost:5052 and try connecting
to an eth1 node on localhost:8545
--subscribe-all-subnets Subscribe to all subnets regardless of validator count. This will also
advertise the beacon node as being long-lived subscribed to all subnets.
--validator-monitor-auto Enables the automatic detection and monitoring of validators connected to the
HTTP API and using the subnet subscription endpoint. This generally has the
effect of providing additional logging and metrics for locally controlled
validators.
-V, --version Prints version information
-z, --zero-ports Sets all listening TCP/UDP ports to 0, allowing the OS to choose some arbitrary
free ports.
OPTIONS:
--auto-compact-db <auto-compact-db>
Enable or disable automatic compaction of the database on finalization. [default: true]
--block-cache-size <SIZE>
Specifies how many blocks the database should cache in memory [default: 5]
--boot-nodes <ENR/MULTIADDR LIST>
One or more comma-delimited base64-encoded ENR's to bootstrap the p2p network. Multiaddr is also supported.
--builder <builder> The URL of a service compatible with the MEV-boost API.
--checkpoint-block <BLOCK_SSZ>
Set a checkpoint block to start syncing from. Must be aligned and match --checkpoint-state. Using
--checkpoint-sync-url instead is recommended.
--checkpoint-state <STATE_SSZ>
Set a checkpoint state to start syncing from. Must be aligned and match --checkpoint-block. Using
--checkpoint-sync-url instead is recommended.
--checkpoint-sync-url <BEACON_NODE>
Set the remote beacon node HTTP endpoint to use for checkpoint sync.
-d, --datadir <DIR>
Used to specify a custom root data directory for lighthouse keys and databases. Defaults to
$HOME/.lighthouse/{network} where network is the value of the `network` flag Note: Users should specify
separate custom datadirs for different networks.
--debug-level <LEVEL>
Specifies the verbosity level used when emitting logs to the terminal. [default: info] [possible values:
info, debug, trace, warn, error, crit]
--discovery-port <PORT>
The UDP port that discovery will listen on. Defaults to `port`
--enr-address <ADDRESS>
The IP address/ DNS address to broadcast to other peers on how to reach this node. If a DNS address is
provided, the enr-address is set to the IP address it resolves to and does not auto-update based on PONG
responses in discovery. Set this only if you are sure other nodes can connect to your local node on this
address. Discovery will automatically find your external address,if possible.
--enr-tcp-port <PORT>
The TCP port of the local ENR. Set this only if you are sure other nodes can connect to your local node on
this port.The --port flag is used if this is not set.
--enr-udp-port <PORT>
The UDP port of the local ENR. Set this only if you are sure other nodes can connect to your local node on
this port.
--eth1-blocks-per-log-query <BLOCKS>
Specifies the number of blocks that a deposit log query should span. This will reduce the size of responses
from the Eth1 endpoint. [default: 1000]
--eth1-cache-follow-distance <BLOCKS>
Specifies the distance between the Eth1 chain head and the last block which should be imported into the
cache. Setting this value lower can help compensate for irregular Proof-of-Work block times, but setting it
too low can make the node vulnerable to re-orgs.
--eth1-endpoint <HTTP-ENDPOINT> Deprecated. Use --eth1-endpoints.
--eth1-endpoints <HTTP-ENDPOINTS>
One or more comma-delimited server endpoints for web3 connection. If multiple endpoints are given the
endpoints are used as fallback in the given order. Also enables the --eth1 flag. Defaults to
http://127.0.0.1:8545.
--execution-endpoint <EXECUTION-ENDPOINT>
Server endpoint for an execution layer jwt authenticated HTTP JSON-RPC connection. Uses the same endpoint to
populate the deposit cache. Also enables the --merge flag.If not provided, uses the default value of
http://127.0.0.1:8551
--execution-jwt <EXECUTION-JWT>
File path which contains the hex-encoded JWT secret for the execution endpoint provided in the --execution-
endpoint flag.
--execution-jwt-id <EXECUTION-JWT-ID>
Used by the beacon node to communicate a unique identifier to execution nodes during JWT authentication. It
corresponds to the 'id' field in the JWT claims object.Set to empty by deafult
--execution-jwt-version <EXECUTION-JWT-VERSION>
Used by the beacon node to communicate a client version to execution nodes during JWT authentication. It
corresponds to the 'clv' field in the JWT claims object.Set to empty by deafult
--fork-choice-before-proposal-timeout <fork-choice-before-proposal-timeout>
Set the maximum number of milliseconds to wait for fork choice before proposing a block. You can prevent
waiting at all by setting the timeout to 0, however you risk proposing atop the wrong parent block.
[default: 250]
--freezer-dir <DIR>
Data directory for the freezer database.
--graffiti <GRAFFITI>
Specify your custom graffiti to be included in blocks. Defaults to the current version and commit, truncated
to fit in 32 bytes.
--http-address <ADDRESS>
Set the listen address for the RESTful HTTP API server. [default: 127.0.0.1]
--http-allow-origin <ORIGIN>
Set the value of the Access-Control-Allow-Origin response HTTP header. Use * to allow any origin (not
recommended in production). If no value is supplied, the CORS allowed origin is set to the listen address of
this server (e.g., http://localhost:5052).
--http-port <PORT>
Set the listen TCP port for the RESTful HTTP API server. [default: 5052]
--http-tls-cert <http-tls-cert>
The path of the certificate to be used when serving the HTTP API server over TLS.
--http-tls-key <http-tls-key>
The path of the private key to be used when serving the HTTP API server over TLS. Must not be password-
protected.
--libp2p-addresses <MULTIADDR>
One or more comma-delimited multiaddrs to manually connect to a libp2p peer without an ENR.
--listen-address <ADDRESS>
The address lighthouse will listen for UDP and TCP connections. [default: 0.0.0.0]
--log-format <FORMAT>
Specifies the log format used when emitting logs to the terminal. [possible values: JSON]
--logfile <FILE>
File path where the log file will be stored. Once it grows to the value specified in `--logfile-max-size` a
new log file is generated where future logs are stored. Once the number of log files exceeds the value
specified in `--logfile-max-number` the oldest log file will be overwritten.
--logfile-debug-level <LEVEL>
The verbosity level used when emitting logs to the log file. [default: debug] [possible values: info,
debug, trace, warn, error, crit]
--logfile-max-number <COUNT>
The maximum number of log files that will be stored. If set to 0, background file logging is disabled.
[default: 5]
--logfile-max-size <SIZE>
The maximum size (in MB) each log file can grow to before rotating. If set to 0, background file logging is
disabled. [default: 200]
--max-skip-slots <NUM_SLOTS>
Refuse to skip more than this many slots when processing a block or attestation. This prevents nodes on
minority forks from wasting our time and disk space, but could also cause unnecessary consensus failures, so
is disabled by default.
--metrics-address <ADDRESS>
Set the listen address for the Prometheus metrics HTTP server. [default: 127.0.0.1]
--metrics-allow-origin <ORIGIN>
Set the value of the Access-Control-Allow-Origin response HTTP header. Use * to allow any origin (not
recommended in production). If no value is supplied, the CORS allowed origin is set to the listen address of
this server (e.g., http://localhost:5054).
--metrics-port <PORT>
Set the listen TCP port for the Prometheus metrics HTTP server. [default: 5054]
--monitoring-endpoint <ADDRESS>
Enables the monitoring service for sending system metrics to a remote endpoint. This can be used to monitor
your setup on certain services (e.g. beaconcha.in). This flag sets the endpoint where the beacon node
metrics will be sent. Note: This will send information to a remote sever which may identify and associate
your validators, IP address and other personal information. Always use a HTTPS connection and never provide
an untrusted URL.
--network <network>
Name of the Eth2 chain Lighthouse will sync and follow. [possible values: mainnet, prater, goerli, gnosis,
kiln, ropsten, sepolia]
--network-dir <DIR>
Data directory for network keys. Defaults to network/ inside the beacon node dir.
--port <PORT>
The TCP/UDP port to listen on. The UDP port can be modified by the --discovery-port flag. [default: 9000]
--safe-slots-to-import-optimistically <INTEGER>
Used to coordinate manual overrides of the SAFE_SLOTS_TO_IMPORT_OPTIMISTICALLY parameter. This flag should
only be used if the user has a clear understanding that the broad Ethereum community has elected to override
this parameter in the event of an attack at the PoS transition block. Incorrect use of this flag can cause
your node to possibly accept an invalid chain or sync more slowly. Be extremely careful with this flag.
--slasher-att-cache-size <COUNT>
Set the maximum number of attestation roots for the slasher to cache
--slasher-chunk-size <EPOCHS>
Number of epochs per validator per chunk stored on disk.
--slasher-dir <PATH>
Set the slasher's database directory.
--slasher-history-length <EPOCHS>
Configure how many epochs of history the slasher keeps. Immutable after initialization.
--slasher-max-db-size <GIGABYTES>
Maximum size of the MDBX database used by the slasher.
--slasher-slot-offset <SECONDS>
Set the delay from the start of the slot at which the slasher should ingest attestations. Only effective if
the slasher-update-period is a multiple of the slot duration.
--slasher-update-period <SECONDS>
Configure how often the slasher runs batch processing.
--slasher-validator-chunk-size <NUM_VALIDATORS>
Number of validators per chunk stored on disk.
--slots-per-restore-point <SLOT_COUNT>
Specifies how often a freezer DB restore point should be stored. Cannot be changed after initialization.
[default: 8192 (mainnet) or 64 (minimal)]
-s, --spec <DEPRECATED>
This flag is deprecated, it will be disallowed in a future release. This value is now derived from the
--network or --testnet-dir flags.
--suggested-fee-recipient <SUGGESTED-FEE-RECIPIENT>
Once the merge has happened, this address will receive transaction fees collected from any blocks produced
by this node. Defaults to a junk address whilst the merge is in development stages. THE DEFAULT VALUE WILL
BE REMOVED BEFORE THE MERGE ENTERS PRODUCTION
--target-peers <target-peers>
The target number of peers. [default: 80]
--terminal-block-hash-epoch-override <EPOCH>
Used to coordinate manual overrides to the TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH parameter. This flag should
only be used if the user has a clear understanding that the broad Ethereum community has elected to override
the terminal PoW block. Incorrect use of this flag will cause your node to experience a consensus
failure. Be extremely careful with this flag.
--terminal-block-hash-override <TERMINAL_BLOCK_HASH>
Used to coordinate manual overrides to the TERMINAL_BLOCK_HASH parameter. This flag should only be used if
the user has a clear understanding that the broad Ethereum community has elected to override the terminal
PoW block. Incorrect use of this flag will cause your node to experience a consensus
failure. Be extremely careful with this flag.
--terminal-total-difficulty-override <INTEGER>
Used to coordinate manual overrides to the TERMINAL_TOTAL_DIFFICULTY parameter. Accepts a 256-bit decimal
integer (not a hex value). This flag should only be used if the user has a clear understanding that the
broad Ethereum community has elected to override the terminal difficulty. Incorrect use of this flag will
cause your node to experience a consensus
failure. Be extremely careful with this flag.
-t, --testnet-dir <DIR>
Path to directory containing eth2_testnet specs. Defaults to a hard-coded Lighthouse testnet. Only effective
if there is no existing database.
--trusted-peers <TRUSTED_PEERS>
One or more comma-delimited trusted peer ids which always have the highest score according to the peer
scoring system.
--validator-monitor-file <PATH>
As per --validator-monitor-pubkeys, but the comma-separated list is contained within a file at the given
path.
--validator-monitor-pubkeys <PUBKEYS>
A comma-separated list of 0x-prefixed validator public keys. These validators will receive special
monitoring and additional logging.
--wss-checkpoint <WSS_CHECKPOINT>
Specify a weak subjectivity checkpoint in `block_root:epoch` format to verify the node's sync against. The
block root should be 0x-prefixed. Note that this flag is for verification only, to perform a checkpoint sync
from a recent state use --checkpoint-sync-url.
See also
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