Optimism Documentation

This page provides detailed documentation for all available op-node configuration options, organized by functionality. The following options are from the --help in v1.10.2.

L1 and L2 connection settings

Configure how op-node connects to L1 (Ethereum) and L2 (execution layer) endpoints.

l1

Address of L1 User JSON-RPC endpoint to use (eth namespace required). The default value is "http://127.0.0.1:8545".

Syntax
Example
Environment variable

--l1=<value>

--l1="http://127.0.0.1:8545"

OP_NODE_L1_ETH_RPC="http://127.0.0.1:8545"

l1.beacon

Address of L1 Beacon-node HTTP endpoint to use.

Syntax
Example
Environment variable

--l1.beacon=<value>

--l1.beacon="http://127.0.0.1:3500"

OP_NODE_L1_BEACON="http://127.0.0.1:3500"

l1.beacon-fallbacks

Addresses of L1 Beacon-API compatible HTTP fallback endpoints. Used to fetch blob sidecars not available at the l1.beacon (e.g. expired blobs).

Syntax
Example
Environment variable

--l1.beacon-fallbacks=<value>

--l1.beacon-fallbacks="http://fallback1.example.com,http://fallback2.example.com"

OP_NODE_L1_BEACON_FALLBACKS="http://fallback1.example.com,http://fallback2.example.com"

l1.beacon-header

Optional HTTP header to add to all requests to the L1 Beacon endpoint. Format: ‘X-Key: Value’

Syntax
Example
Environment variable

--l1.beacon-header=<value>

--l1.beacon-header="Authorization: Bearer token"

OP_NODE_L1_BEACON_HEADER="Authorization: Bearer token"

l1.beacon.fetch-all-sidecars

If true, all sidecars are fetched and filtered locally. Workaround for buggy Beacon nodes. The default value is false.

Syntax
Example
Environment variable

--l1.beacon.fetch-all-sidecars=<boolean>

--l1.beacon.fetch-all-sidecars=false

OP_NODE_L1_BEACON=false

l1.beacon.ignore

When false, halts op-node startup if the healthcheck to the Beacon-node endpoint fails. The default value is false.

Syntax
Example
Environment variable

--l1.beacon.ignore=<boolean>

--l1.beacon.ignore=false

OP_NODE_L1_BEACON_IGNORE=false

l1.cache-size

Cache size for blocks, receipts and transactions. If this flag is set to 0, 3/2 of the sequencing window size is used (usually 2400). The default value of 900 (~3h of L1 blocks) is good for (high-throughput) networks that see frequent safe head increments. On (low-throughput) networks with infrequent safe head increments, it is recommended to set this value to 0, or a value that well covers the typical span between safe head increments. Note that higher values will cause significantly increased memory usage. The default value is 900.

Syntax
Example
Environment variable

--l1.cache-size=<value>

--l1.cache-size=900

OP_NODE_L1_CACHE_SIZE=900

l1.epoch-poll-interval

Poll interval for retrieving new L1 epoch updates such as safe and finalized block changes. Disabled if 0 or negative. The default value is 6m24s.

Syntax
Example
Environment variable

--l1.epoch-poll-interval=<value>

--l1.epoch-poll-interval=6m24s

OP_NODE_L1_EPOCH_POLL_INTERVAL=6m24s

l1.http-poll-interval

Polling interval for latest-block subscription when using an HTTP RPC provider. Ignored for other types of RPC endpoints. The default value is 12s.

Syntax
Example
Environment variable

--l1.http-poll-interval=<value>

--l1.http-poll-interval=12s

OP_NODE_L1_HTTP_POLL_INTERVAL=12s

l1.max-concurrency

Maximum number of concurrent RPC requests to make to the L1 RPC provider. The default value is 10.

Syntax
Example
Environment variable

--l1.max-concurrency=<value>

--l1.max-concurrency=10

OP_NODE_L1_MAX_CONCURRENCY=10

l1.rpc-max-batch-size

Maximum number of RPC requests to bundle, e.g., during L1 blocks receipt fetching. The L1 RPC rate limit counts this as N items, but allows it to burst at once. The default value is 20.

Syntax
Example
Environment variable

--l1.rpc-max-batch-size=<value>

--l1.rpc-max-batch-size=20

OP_NODE_L1_RPC_MAX_BATCH_SIZE=20

l1.rpc-rate-limit

Optional self-imposed global rate-limit on L1 RPC requests, specified in requests / second. Disabled if set to 0. The default value is 0.

Syntax
Example
Environment variable

--l1.rpc-rate-limit=<value>

--l1.rpc-rate-limit=0

OP_NODE_L1_RPC_RATE_LIMIT=0

l1.rpckind

The kind of RPC provider, used to inform optimal transactions receipts fetching, and thus reduce costs. Valid options: alchemy, quicknode, infura, parity, nethermind, debug_geth, erigon, basic, any, standard. The default value is standard.

Syntax
Example
Environment variable

--l1.rpckind=<value>

--l1.rpckind=standard

OP_NODE_L1_RPC_KIND=standard

For details on additional values, see RPC Receipts.

l1.runtime-config-reload-interval

Poll interval for reloading the runtime config, useful when config events are not being picked up. Disabled if 0 or negative. The default value is 10m0s.

Syntax
Example
Environment variable

--l1.runtime-config-reload-interval=<value>

--l1.runtime-config-reload-interval=10m0s

OP_NODE_L1_RUNTIME_CONFIG_RELOAD_INTERVAL=10m0s

l1.trustrpc

Trust the L1 RPC, sync faster at risk of malicious/buggy RPC providing bad or inconsistent L1 data. The default value is false.

If you’re running an Erigon Ethereum execution client for your L1 provider you will need to include --l1.trustrpc. At the time of writing, Erigon doesn’t support the eth_getProof that we prefer to use to load L1 data for some processing in op-node. The trustrpc flag makes it use something else that erigon supports, but the op-node can’t verify for correctness.

Syntax
Example
Environment variable

--l1.trustrpc=<boolean>

--l1.trustrpc=false

OP_NODE_L1_TRUST_RPC=false

l2

Address of L2 Engine JSON-RPC endpoints to use (engine and eth namespace required). This is referred to as authrpc by Geth and Reth.

Syntax
Example
Environment variable

--l2=<value>

--l2=http://127.0.0.1:8751

OP_NODE_L2_ENGINE_RPC=http://127.0.0.1:8751

l2.engine-rpc-timeout

L2 engine client rpc timeout. The default value is 10s.

Syntax
Example
Environment variable

--l2.engine-rpc-timeout=<value>

--l2.engine-rpc-timeout=10s

OP_NODE_L2_ENGINE_RPC_TIMEOUT=10s

l2.jwt-secret

Path to JWT secret key. Keys are 32 bytes, hex encoded in a file. A new key will be generated if left empty.

Syntax
Example
Environment variable

--l2.jwt-secret=<value>

--l2.jwt-secret=/path/to/jwt/secret

OP_NODE_L2_ENGINE_AUTH=/path/to/jwt/secret

l2.enginekind

The kind of engine client, used to control the behavior of optimism in respect to different types of engine clients. Valid options: geth, reth, erigon. The default value is geth.

Syntax
Example
Environment variable

--l2.enginekind=<value>

--l2.enginekind=geth

OP_NODE_L2_ENGINE_KIND=geth

Network selection and rollup configuration

Configure which OP Stack network to connect to and manage rollup-specific settings.

network

Predefined network selection. Available networks: arena-z-mainnet, arena-z-sepolia, automata-mainnet, base-devnet-0-sepolia-dev-0, base-mainnet, base-sepolia, bob-mainnet, camp-sepolia, creator-chain-testnet-sepolia, cyber-mainnet, cyber-sepolia, ethernity-mainnet, ethernity-sepolia, fraxtal-mainnet, funki-mainnet, funki-sepolia, hashkeychain-mainnet, ink-mainnet, ink-sepolia, lisk-mainnet, lisk-sepolia, lyra-mainnet, metal-mainnet, metal-sepolia, mint-mainnet, mode-mainnet, mode-sepolia, op-mainnet, op-sepolia, oplabs-devnet-0-sepolia-dev-0, orderly-mainnet, ozean-sepolia, pivotal-sepolia, polynomial-mainnet, race-mainnet, race-sepolia, radius_testnet-sepolia, redstone-mainnet, rehearsal-0-bn-0-rehearsal-0-bn, rehearsal-0-bn-1-rehearsal-0-bn, settlus-mainnet-mainnet, settlus-sepolia-sepolia, shape-mainnet, shape-sepolia, silent-data-mainnet-mainnet, snax-mainnet, soneium-mainnet, soneium-minato-sepolia, sseed-mainnet, swan-mainnet, swell-mainnet, tbn-mainnet, tbn-sepolia, unichain-mainnet, unichain-sepolia, worldchain-mainnet, worldchain-sepolia, xterio-eth-mainnet, zora-mainnet, zora-sepolia.

Syntax
Example
Environment variable

--network=<value>

--network=op-mainnet

OP_NODE_NETWORK=op-mainnet

rollup.config

Rollup chain parameters.

Syntax
Example
Environment variable

--rollup.config=<value>

--rollup.config=[ConfigValueHere]

OP_NODE_ROLLUP_CONFIG=[ConfigValueHere]

rollup.halt

Opt-in option to halt on incompatible protocol version requirements of the given level (major/minor/patch/none), as signaled onchain in L1.

Syntax
Example
Environment variable

--rollup.halt=<value>

--rollup.halt=[HaltOptionHere]

OP_NODE_ROLLUP_HALT=[HaltOptionHere]

rollup.l1-chain-config

Path to .json file with the chain configuration for the L1, either in the direct format or genesis.json format (i.e. embedded under the .config property). Not necessary / will be ignored if using Ethereum mainnet or Sepolia as an L1.

Syntax
Example
Environment variable

--rollup.l1-chain-config=<value>

--rollup.l1-chain-config=/path/to/l1-config.json

OP_NODE_ROLLUP_L1_CHAIN_CONFIG=/path/to/l1-config.json

rollup.load-protocol-versions

Load protocol versions from the superchain L1 ProtocolVersions contract (if available), and report in logs and metrics. Default is false.

Syntax
Example
Environment variable

--rollup.load-protocol-versions=[true|false]

--rollup.load-protocol-versions=false

OP_NODE_ROLLUP_LOAD_PROTOCOL_VERSIONS=false

syncmode

Blockchain sync mode. Options are “consensus-layer” or “execution-layer”. The default value is consensus-layer.

Syntax
Example
Environment variable

--syncmode=<value>

--syncmode=consensus-layer

OP_NODE_SYNCMODE=consensus-layer

Fork overrides

Manually override fork activation timestamps for testing or custom deployments.

override.canyon

Manually specify the Canyon fork timestamp, overriding the bundled setting. The default value is 0.

Syntax
Example
Environment variable

--override.canyon=<value>

--override.canyon=0

OP_NODE_OVERRIDE_CANYON=0

override.delta

Manually specify the Delta fork timestamp, overriding the bundled setting. The default value is 0.

Syntax
Example
Environment variable

--override.delta=<value>

--override.delta=0

OP_NODE_OVERRIDE_DELTA=0

override.ecotone

Manually specify the ecotone fork timestamp, overriding the bundled setting. The default value is 0.

Syntax
Example
Environment variable

--override.ecotone=<value>

--override.ecotone=0

OP_NODE_OVERRIDE_ECOTONE=0

override.fjord

Manually specify the fjord fork timestamp, overriding the bundled setting. The default value is 0.

Syntax
Example
Environment variable

--override.fjord=<value>

--override.fjord=0

OP_NODE_OVERRIDE_FJORD=0

override.granite

Manually specify the granite fork timestamp, overriding the bundled setting. The default value is 0.

Syntax
Example
Environment variable

--override.granite=<value>

--override.granite=0

OP_NODE_OVERRIDE_GRANITE=0

override.holocene

Manually specify the holocene fork timestamp, overriding the bundled setting. The default value is 0.

Syntax
Example
Environment variable

--override.holocene=<value>

--override.holocene=0

OP_NODE_OVERRIDE_HOLOCENE=0

override.isthmus

Manually specify the isthmus fork timestamp, overriding the bundled setting. The default value is 0.

Syntax
Example
Environment variable

--override.isthmus=<value>

--override.isthmus=0

OP_NODE_OVERRIDE_ISTHMUS=0

override.interop

Manually specify the Interop fork timestamp, overriding the bundled setting. The default value is 0.

Syntax
Example
Environment variable

--override.interop=<value>

--override.interop=0

OP_NODE_OVERRIDE_INTEROP=0

override.jovian

Manually specify the Jovian fork timestamp, overriding the bundled setting. The default value is 0.

Syntax
Example
Environment variable

--override.jovian=<value>

--override.jovian=0

OP_NODE_OVERRIDE_JOVIAN=0

override.pectrablobschedule

Manually specify the PectraBlobSchedule fork timestamp, overriding the bundled setting. The default value is 0.

Syntax
Example
Environment variable

--override.pectrablobschedule=<value>

--override.pectrablobschedule=0

OP_NODE_OVERRIDE_PECTRABLOBSCHEDULE=0

Logging configuration

Control log output format, level, and color.

log.color

Color the log output if in terminal mode. The default value is false.

Syntax
Example
Environment variable

--log.color=<boolean>

--log.color=false

OP_NODE_LOG_COLOR=false

log.format

Format the log output. Supported formats: ‘text’, ‘terminal’, ‘logfmt’, ‘json’, ‘json-pretty’. The default value is text.

Syntax
Example
Environment variable

--log.format=<value>

--log.format=text

OP_NODE_LOG_FORMAT=text

log.level

The lowest log level that will be output. The default value is info.

Syntax
Example
Environment variable

--log.level=<value>

--log.level=info

OP_NODE_LOG_LEVEL=info

log.pid

Show pid in the log. The default value is false.

Syntax
Example
Environment variable

--log.pid=<boolean>

--log.pid=false

OP_NODE_LOG_PID=false

Logging and RPC

Configure RPC API endpoints and admin functionality.

rpc.addr

RPC listening address. Default is "0.0.0.0".

Syntax
Example
Environment variable

--rpc.addr=<value>

--rpc.addr=0.0.0.0

OP_NODE_RPC_ADDR=0.0.0.0

rpc.admin-state

File path used to persist state changes made via the admin API so they persist across restarts. Disabled if not set.

Syntax
Example
Environment variable

--rpc.admin-state=<value>

--rpc.admin-state=[FilePathHere]

OP_NODE_RPC_ADMIN_STATE=[FilePathHere]

rpc.enable-admin

Enable the admin API (experimental). Default is false.

Syntax
Example
Environment variable

--rpc.enable-admin=[true|false]

--rpc.enable-admin=false

OP_NODE_RPC_ENABLE_ADMIN=false

rpc.port

RPC listening port. Default is 9545.

Syntax
Example
Environment variable

--rpc.port=<value>

--rpc.port=9545

OP_NODE_RPC_PORT=9545

Metrics and profiling

Enable observability through metrics and performance profiling.

metrics.addr

Metrics listening address. The default value is "0.0.0.0".

Syntax
Example
Environment variable

--metrics.addr=<value>

--metrics.addr="0.0.0.0"

OP_NODE_METRICS_ADDR="0.0.0.0"

metrics.enabled

Enable the metrics server. The default value is false.

Syntax
Example
Environment variable

--metrics.enabled=<boolean>

--metrics.enabled=false

OP_NODE_METRICS_ENABLED=false

metrics.port

Metrics listening port. The default value is 7300.

Syntax
Example
Environment variable

--metrics.port=<value>

--metrics.port=7300

OP_NODE_METRICS_PORT=7300

pprof.addr

pprof listening address. Default is "0.0.0.0".

Syntax
Example
Environment variable

--pprof.addr=<value>

--pprof.addr=0.0.0.0

OP_NODE_PPROF_ADDR=0.0.0.0

pprof.enabled

Enable the pprof server. Default is false.

Syntax
Example
Environment variable

--pprof.enabled=[true|false]

--pprof.enabled=false

OP_NODE_PPROF_ENABLED=false

pprof.path

pprof file path. If it is a directory, the path is {dir}/{profileType}.prof

Syntax
Example
Environment variable

--pprof.path=<path>

--pprof.path={dir}/{profileType}.prof

OP_NODE_PPROF_PATH={dir}/{profileType}.prof

pprof.port

pprof listening port. Default is 6060.

Syntax
Example
Environment variable

--pprof.port=<value>

--pprof.port=6060

OP_NODE_PPROF_PORT=6060

pprof.type

pprof profile type. One of cpu, heap, goroutine, threadcreate, block, mutex, allocs

Syntax
Example
Environment variable

--pprof.type=<value>

--pprof.type=cpu

OP_NODE_PPROF_TYPE=cpu

P2P networking

Configure peer-to-peer networking, discovery, and connection management.

p2p.advertise.ip

The IP address to advertise in Discv5, put into the ENR of the node. This may also be a hostname/domain name to resolve to an IP.

Syntax
Example
Environment variable

--p2p.advertise.ip=<value>

--p2p.advertise.ip=YourIPAddressOrHostnameHere

OP_NODE_P2P_ADVERTISE_IP=YourIPAddressOrHostnameHere

p2p.advertise.tcp

The TCP port to advertise in Discv5, put into the ENR of the node. Set to p2p.listen.tcp value if 0. The default value is 0.

Syntax
Example
Environment variable

--p2p.advertise.tcp=<value>

--p2p.advertise.tcp=3456

OP_NODE_P2P_ADVERTISE_TCP=3456

p2p.advertise.udp

The UDP port to advertise in Discv5 as a fallback if not determined by Discv5, put into the ENR of the node. Set to p2p.listen.udp value if 0. The default value is 0.

Syntax
Example
Environment variable

--p2p.advertise.udp=<value>

--p2p.advertise.udp=3457

OP_NODE_P2P_ADVERTISE_UDP=3457

p2p.ban.duration

The duration that peers are banned for. The default value is 1h0m0s.

Syntax
Example
Environment variable

--p2p.ban.duration=<value>

--p2p.ban.duration=1h0m0s

OP_NODE_P2P_PEER_BANNING_DURATION=1h0m0s

p2p.ban.peers

Enables peer banning. The default value is true.

Syntax
Example
Environment variable

--p2p.ban.peers=<boolean>

--p2p.ban.peers=true

OP_NODE_P2P_PEER_BANNING=true

p2p.ban.threshold

The minimum score below which peers are disconnected and banned. The default value is -100.

Syntax
Example
Environment variable

--p2p.ban.threshold=<value>

--p2p.ban.threshold=-100

OP_NODE_P2P_PEER_BANNING_THRESHOLD=-100

p2p.bootnodes

Comma-separated base64-format ENR list. Bootnodes to start discovering other node records from.

Syntax
Example
Environment variable

--p2p.bootnodes=<value>

--p2p.bootnodes=YourBootnodesListHere

OP_NODE_P2P_BOOTNODES=YourBootnodesListHere

p2p.disable

Completely disable the P2P stack. The default value is false.

Syntax
Example
Environment variable

--p2p.disable=<boolean>

--p2p.disable=false

OP_NODE_P2P_DISABLE=false

p2p.discovery.path

Enables persistent storage of discovered ENRs in a database to recover from a restart without bootstrapping the discovery process again. Set to ‘memory’ to never persist the peerstore. The default value is opnode_discovery_db.

Syntax
Example
Environment variable

--p2p.discovery.path=<value>

--p2p.discovery.path=opnode_discovery_db

OP_NODE_P2P_DISCOVERY_PATH=opnode_discovery_db

p2p.gossip.timestamp.threshold

Threshold for rejecting gossip messages with payload timestamps older than this duration. The default value is 1m0s.

Syntax
Example
Environment variable

--p2p.gossip.timestamp.threshold=<value>

--p2p.gossip.timestamp.threshold=1m0s

OP_NODE_P2P_GOSSIP_TIMESTAMP_THRESHOLD=1m0s

p2p.listen.ip

Specifies the IP to bind LibP2P and Discv5 to. The default value is 0.0.0.0.

Syntax
Example
Environment variable

--p2p.listen.ip=<value>

--p2p.listen.ip=0.0.0.0

OP_NODE_P2P_LISTEN_IP=0.0.0.0

p2p.listen.tcp

Defines the TCP port to bind LibP2P to. Any available system port if set to 0. The default value is 9222.

Syntax
Example
Environment variable

--p2p.listen.tcp=<value>

--p2p.listen.tcp=9222

OP_NODE_P2P_LISTEN_TCP_PORT=9222

p2p.listen.udp

Sets the UDP port to bind Discv5 to. It will be the same as the TCP port if left at 0. The default value is 0.

Syntax
Example
Environment variable

--p2p.listen.udp=<value>

--p2p.listen.udp=0

OP_NODE_P2P_LISTEN_UDP_PORT=0

p2p.nat

Enables NAT traversal with PMP/UPNP devices to learn external IP. The default value is false.

Syntax
Example
Environment variable

--p2p.nat=<boolean>

--p2p.nat=false

OP_NODE_P2P_NAT=false

p2p.netrestrict

Specifies a comma-separated list of CIDR masks. P2P will only try to connect on these networks.

Syntax
Example
Environment variable

--p2p.netrestrict=<value>

--p2p.netrestrict=

OP_NODE_P2P_NETRESTRICT=

p2p.no-discovery

Disables Discv5 (node discovery). The default value is false.

Syntax
Example
Environment variable

--p2p.no-discovery=<boolean>

--p2p.no-discovery=false

OP_NODE_P2P_NO_DISCOVERY=false

p2p.peers.grace

Determines the grace period to keep a newly connected peer around, if it is not misbehaving. The default value is 30s.

Syntax
Example
Environment variable

--p2p.peers.grace=<value>

--p2p.peers.grace=30s

OP_NODE_P2P_PEERS_GRACE=30s

p2p.peers.hi

Sets the high-tide peer count. The node starts pruning peer connections slowly after reaching this number. The default value is 30.

Syntax
Example
Environment variable

--p2p.peers.hi=<value>

--p2p.peers.hi=30

OP_NODE_P2P_PEERS_HI=30

p2p.peers.lo

Determines the low-tide peer count. The node actively searches for new peer connections if below this amount. The default value is 20.

Syntax
Example
Environment variable

--p2p.peers.lo=<number>

--p2p.peers.lo=20

OP_NODE_P2P_PEERS_LO=20

p2p.peerstore.path

Specifies the Peerstore database location. Persisted peerstores help recover peers after restarts. Set to ‘memory’ to never persist the peerstore. Warning: a copy of the priv network key of the local peer will be persisted here. The default value is "opnode_peerstore_db".

Syntax
Example
Environment variable

--p2p.peerstore.path=<path>

--p2p.peerstore.path=opnode_peerstore_db

OP_NODE_P2P_PEERSTORE_PATH=opnode_peerstore_db

p2p.priv.path

Defines the file path for reading the hex-encoded 32-byte private key for the peer ID. Created if not already exists. Important for maintaining the same network identity after restarting. The default value is "opnode_p2p_priv.txt".

Syntax
Example
Environment variable

--p2p.priv.path=<file-path>

--p2p.priv.path=opnode_p2p_priv.txt

OP_NODE_P2P_PRIV_PATH=opnode_p2p_priv.txt

p2p.scoring

Sets the peer scoring strategy for the P2P stack. Options include ‘none’ or ‘light’. The default value is "light".

Syntax
Example
Environment variable

--p2p.scoring=<strategy>

--p2p.scoring=light

OP_NODE_P2P_PEER_SCORING=light

p2p.sequencer.key

Hex-encoded private key for signing off on p2p application messages as sequencer.

Syntax
Example
Environment variable

--p2p.sequencer.key=<value>

--p2p.sequencer.key=[YourKeyHere]

OP_NODE_P2P_SEQUENCER_KEY=[YourKeyHere]

p2p.static

Comma-separated multiaddr-format(an unsigned address, containing: IP, TCP port, PeerID) peer list. Static connections to make and maintain, these peers will be regarded as trusted. Addresses of the local peer are ignored. Duplicate/Alternative addresses for the same peer all apply, but only a single connection per peer is maintained.

Syntax
Example
Environment variable

--p2p.static=<value>

--p2p.static=/ip4/127.0.0.1/tcp/9222/p2p/16Uiu2HAm2y6DXp6THWHCyquczNUh8gVAm4spo6hjP3Ns1dGRiAdE

OP_NODE_P2P_STATIC=/ip4/127.0.0.1/tcp/9222/p2p/16Uiu2HAm2y6DXp6THWHCyquczNUh8gVAm4spo6hjP3Ns1dGRiAdE

p2p.sync.onlyreqtostatic

Restricts RequestL2Range sync requests to static peers only. Useful for enforcing trusted peer sync. When enabled, non-static peers are skipped during sync. Default is false.

Syntax
Example
Environment variable

--p2p.sync.onlyreqtostatic=[true|false]

--p2p.sync.onlyreqtostatic=true

OP_NODE_P2P_SYNC_ONLYREQTOSTATIC=true

p2p.sync.req-resp

Enables P2P req-resp alternative sync method, on both server and client side. Default is true.

Syntax
Example
Environment variable

--p2p.sync.req-resp=[true|false]

--p2p.sync.req-resp=true

OP_NODE_P2P_SYNC_REQ_RESP=true

Sequencer options

Configuration for running op-node as a sequencer.

sequencer.enabled

Enable sequencing of new L2 blocks. A separate batch submitter has to be deployed to publish the data for verifiers. Default is false.

Syntax
Example
Environment variable

--sequencer.enabled=[true|false]

--sequencer.enabled=false

OP_NODE_SEQUENCER_ENABLED=false

sequencer.l1-confs

Number of L1 blocks to keep distance from the L1 head as a sequencer for picking an L1 origin. Default is 4.

Syntax
Example
Environment variable

--sequencer.l1-confs=<value>

--sequencer.l1-confs=4

OP_NODE_SEQUENCER_L1_CONFS=4

The maximum value for sequencer.l1-confs cannot exceed the sequencer drift, currently set to 30 minutes (1800 seconds or 150 blocks). Setting a value higher than this limit will prevent the sequencer from producing blocks within the sequence window.

sequencer.max-safe-lag

Maximum number of L2 blocks for restricting the distance between L2 safe and unsafe. Disabled if 0. Default is 0.

Syntax
Example
Environment variable

--sequencer.max-safe-lag=<value>

--sequencer.max-safe-lag=0

OP_NODE_SEQUENCER_MAX_SAFE_LAG=0

sequencer.recover

Forces the sequencer to strictly prepare the next L1 origin and create empty L2 blocks. Default is false.

Syntax
Example
Environment variable

--sequencer.recover=[true|false]

--sequencer.recover=false

OP_NODE_SEQUENCER_RECOVER=false

sequencer.stopped

Initialize the sequencer in a stopped state. The sequencer can be started using the admin_startSequencer RPC. Default is false.

Syntax
Example
Environment variable

--sequencer.stopped=[true|false]

--sequencer.stopped=false

OP_NODE_SEQUENCER_STOPPED=false

Verifier options

Configuration for running op-node as a verifier (replica node).

verifier.l1-confs

Number of L1 blocks to keep distance from the L1 head before deriving L2 data from. Reorgs are supported, but may be slow to perform. Default is 0.

Syntax
Example
Environment variable

--verifier.l1-confs=<value>

--verifier.l1-confs=0

OP_NODE_VERIFIER_L1_CONFS=0

While verifier.l1-confs has no strict limit, it’s recommended to keep this value within 12-13 minutes (typically 10-20 blocks) for optimal performance. Exceeding this range may impact the verifier’s data processing efficiency.

Conductor mode

Options for running op-node in conductor mode (for conductor-enabled chains).

conductor.enabled

Enable the conductor service. The default value is false.

Syntax
Example
Environment variable

--conductor.enabled=<boolean>

--conductor.enabled=false

OP_NODE_CONDUCTOR_ENABLED=false

conductor.rpc

Conductor service rpc endpoint. The default value is http://127.0.0.1:8547.

Syntax
Example
Environment variable

--conductor.rpc=<value>

--conductor.rpc=http://127.0.0.1:8547

OP_NODE_CONDUCTOR_RPC=http://127.0.0.1:8547

conductor.rpc-timeout

Conductor service rpc timeout. The default value is 1s.

Syntax
Example
Environment variable

--conductor.rpc-timeout=<value>

--conductor.rpc-timeout=1s

OP_NODE_CONDUCTOR_RPC_TIMEOUT=1s

Database and state persistence

Configure persistent storage for node state and snapshot data.

safedb.path

File path used to persist safe head update data. Disabled if not set.

Syntax
Example
Environment variable

--safedb.path=<value>

--safedb.path=/db

OP_NODE_SAFEDB_PATH=/db

snapshotlog.file

Path to the snapshot log file.

Syntax
Example
Environment variable

--snapshotlog.file=<value>

--snapshotlog.file=[FilePathHere]

OP_NODE_SNAPSHOT_LOG=[FilePathHere]

Signer configuration

Options for configuring an external signer for P2P messages.

signer.address

Address the signer is signing requests for.

Syntax
Example
Environment variable

--signer.address=<value>

--signer.address=0x1234...

OP_NODE_SIGNER_ADDRESS=0x1234...

signer.endpoint

Signer endpoint the client will connect to.

Syntax
Example
Environment variable

--signer.endpoint=<value>

--signer.endpoint=https://signer.example.com

OP_NODE_SIGNER_ENDPOINT=https://signer.example.com

signer.header

Headers to pass to the remote signer. Format key=value. Value can contain any character allowed in a HTTP header. When using env vars, split with commas. When using flags one key value pair per flag.

Syntax
Example
Environment variable

--signer.header=<value>

--signer.header="Authorization: Bearer token"

OP_NODE_SIGNER_HEADER="Authorization: Bearer token"

signer.tls.ca

TLS ca cert path. The default value is "tls/ca.crt".

Syntax
Example
Environment variable

--signer.tls.ca=<value>

--signer.tls.ca="tls/ca.crt"

OP_NODE_SIGNER_TLS_CA="tls/ca.crt"

signer.tls.cert

TLS cert path. The default value is "tls/tls.crt".

Syntax
Example
Environment variable

--signer.tls.cert=<value>

--signer.tls.cert="tls/tls.crt"

OP_NODE_SIGNER_TLS_CERT="tls/tls.crt"

signer.tls.enabled

Enable or disable TLS client authentication for the signer. The default value is true.

Syntax
Example
Environment variable

--signer.tls.enabled=<boolean>

--signer.tls.enabled=true

OP_NODE_SIGNER_TLS_ENABLED=true

signer.tls.key

TLS key path. The default value is "tls/tls.key".

Syntax
Example
Environment variable

--signer.tls.key=<value>

--signer.tls.key="tls/tls.key"

OP_NODE_SIGNER_TLS_KEY="tls/tls.key"

Alt-DA (Experimental)

Alt-DA Mode is a Beta feature of the MIT licensed OP Stack. While it has received initial review from core contributors, it is still undergoing testing, and may have bugs or other issues.

Configuration options for Alternative Data Availability mode.

altda.enabled

Enable Alt-DA mode. The default value is false.

Syntax
Example
Environment variable

--altda.enabled=<boolean>

--altda.enabled=false

OP_NODE_ALTDA_ENABLED=false

altda.da-server

HTTP address of a DA Server.

Syntax
Example
Environment variable

--altda.da-server=<value>

--altda.da-server=http://da-server.example.com

OP_NODE_ALTDA_DA_SERVER=http://da-server.example.com

altda.da-service

Use DA service type where commitments are generated by Alt-DA server. The default value is false.

Syntax
Example
Environment variable

--altda.da-service=<boolean>

--altda.da-service=false

OP_NODE_ALTDA_DA_SERVICE=false

altda.get-timeout

Timeout for get requests. 0 means no timeout. The default value is 0s.

Syntax
Example
Environment variable

--altda.get-timeout=<value>

--altda.get-timeout=0s

OP_NODE_ALTDA_GET_TIMEOUT=0s

altda.max-concurrent-da-requests

Maximum number of concurrent requests to the DA server. The default value is 1.

Syntax
Example
Environment variable

--altda.max-concurrent-da-requests=<value>

--altda.max-concurrent-da-requests=1

OP_NODE_ALTDA_MAX_CONCURRENT_DA_REQUESTS=1

altda.put-timeout

Timeout for put requests. 0 means no timeout. The default value is 0s.

Syntax
Example
Environment variable

--altda.put-timeout=<value>

--altda.put-timeout=0s

OP_NODE_ALTDA_PUT_TIMEOUT=0s

altda.verify-on-read

Verify input data matches the commitments from the DA storage service. The default value is true.

Syntax
Example
Environment variable

--altda.verify-on-read=<boolean>

--altda.verify-on-read=true

OP_NODE_ALTDA_VERIFY_ON_READ=true

Interop (Super Experimental)

Interop is a highly experimental feature. Use with caution in production environments.

Configuration options for OP Stack interop networks.

interop.dependency-set

Dependency-set configuration, point at JSON file.

Syntax
Example
Environment variable

--interop.dependency-set=<value>

--interop.dependency-set=/path/to/dependency-set.json

OP_NODE_INTEROP_DEPENDENCY_SET=/path/to/dependency-set.json

interop.jwt-secret

Interop RPC server authentication. Path to JWT secret key. Keys are 32 bytes, hex encoded in a file. A new key will be generated if the file is empty. Applies only to Interop-enabled networks.

Syntax
Example
Environment variable

--interop.jwt-secret=<value>

--interop.jwt-secret=/path/to/interop-jwt-secret.txt

OP_NODE_INTEROP_JWT_SECRET=/path/to/interop-jwt-secret.txt

interop.rpc.addr

Interop Websocket-only RPC listening address, for supervisor service to manage syncing of the op-node. Applies only to Interop-enabled networks. Optional, disabled if left empty. Do not enable if you do not run a supervisor service.

Syntax
Example
Environment variable

--interop.rpc.addr=<value>

--interop.rpc.addr=0.0.0.0

OP_NODE_INTEROP_RPC_ADDR=0.0.0.0

interop.rpc.port

Interop RPC listening port, to serve supervisor syncing. Applies only to Interop-enabled networks. The default value is 9645.

Syntax
Example
Environment variable

--interop.rpc.port=<value>

--interop.rpc.port=9645

OP_NODE_INTEROP_RPC_PORT=9645

Experimental and miscellaneous

Additional experimental features and utility flags.

experimental.sequencer-api

Enables experimental test sequencer RPC functionality. The default value is false.

Syntax
Example
Environment variable

--experimental.sequencer-api=<boolean>

--experimental.sequencer-api=false

OP_NODE_EXPERIMENTAL_SEQUENCER_API=false

fetch-withdrawal-root-from-state

Read withdrawal_storage_root (aka message passer storage root) from state trie (via execution layer) instead of the block header. Restores pre-Isthmus behavior, requires an archive EL client. The default value is false.

Syntax
Example
Environment variable

--fetch-withdrawal-root-from-state=<boolean>

--fetch-withdrawal-root-from-state=false

OP_NODE_FETCH_WITHDRAWAL_ROOT_FROM_STATE=false

General options

Help and version information.

—help, -h

Show help. The default value is false.

Syntax
Syntax

--help OR -h

--help

—version, -v

Nodes built from source do not output the correct version numbers that are reported on the GitHub release page.

Print the version. The default value is false.

Syntax
Syntax

--version OR -v

--version

Node log levels

Node log levels determine the verbosity of log messages, allowing operators to filter messages based on importance and detail. The log levels for the op-node (used in Optimism) are as follows:

Silent (0): No log messages are displayed. This level is rarely used as it provides no feedback on the node’s status.
Error (1): Only error messages are displayed. Use this level to focus on critical issues that need immediate attention.
Warn (2): Displays error messages and warnings. This level helps to identify potential problems that might not be immediately critical but require attention.
Info (3): Displays error messages, warnings, and normal activity logs. This is the default level and provides a balanced view of the node’s operations without being too verbose.
Debug (4): All info-level messages plus additional debugging information. Use this level when troubleshooting issues or developing the node software.
Detail (5): The most verbose level, including detailed debugging information and low-level system operations. This level generates a large amount of log data and is typically used only for in-depth troubleshooting.

To set the log level, use the --log.level flag when running the op-node command. For example, to set the log level to debug:

op-node --log.level=debug

By adjusting the log level, operators can control the amount and type of information that gets logged, helping to manage log data volume and focus on relevant details during different operational scenarios.

Getting Started

Guides

Tutorials

Reference

​L1 and L2 connection settings

​l1

​l1.beacon

​l1.beacon-fallbacks

​l1.beacon-header

​l1.beacon.fetch-all-sidecars

​l1.beacon.ignore

​l1.cache-size

​l1.epoch-poll-interval

​l1.http-poll-interval

​l1.max-concurrency

​l1.rpc-max-batch-size

​l1.rpc-rate-limit

​l1.rpckind

​l1.runtime-config-reload-interval

​l1.trustrpc

​l2

​l2.engine-rpc-timeout

​l2.jwt-secret

​l2.enginekind

​Network selection and rollup configuration

​network

​rollup.config

​rollup.halt

​rollup.l1-chain-config

​rollup.load-protocol-versions

​syncmode

​Fork overrides

​override.canyon

​override.delta

​override.ecotone

​override.fjord

​override.granite

​override.holocene

​override.isthmus

​override.interop

​override.jovian

​override.pectrablobschedule

​Logging configuration

​log.color

​log.format

​log.level

​log.pid

​Logging and RPC

​rpc.addr

​rpc.admin-state

​rpc.enable-admin

​rpc.port

​Metrics and profiling

​metrics.addr

​metrics.enabled

​metrics.port

​pprof.addr

​pprof.enabled

​pprof.path

​pprof.port

​pprof.type

​P2P networking

​p2p.advertise.ip

​p2p.advertise.tcp

​p2p.advertise.udp

​p2p.ban.duration

​p2p.ban.peers

​p2p.ban.threshold

​p2p.bootnodes

​p2p.disable

​p2p.discovery.path

​p2p.gossip.timestamp.threshold

​p2p.listen.ip

​p2p.listen.tcp

​p2p.listen.udp

​p2p.nat

​p2p.netrestrict

​p2p.no-discovery

​p2p.peers.grace

​p2p.peers.hi

L1 and L2 connection settings

l1

l1.beacon

l1.beacon-fallbacks

l1.beacon-header

l1.beacon.fetch-all-sidecars

l1.beacon.ignore

l1.cache-size

l1.epoch-poll-interval

l1.http-poll-interval

l1.max-concurrency

l1.rpc-max-batch-size

l1.rpc-rate-limit

l1.rpckind

l1.runtime-config-reload-interval

l1.trustrpc

l2

l2.engine-rpc-timeout

l2.jwt-secret

l2.enginekind

Network selection and rollup configuration

network

rollup.config

rollup.halt

rollup.l1-chain-config

rollup.load-protocol-versions

syncmode

Fork overrides

override.canyon

override.delta

override.ecotone

override.fjord

override.granite

override.holocene

override.isthmus

override.interop

override.jovian

override.pectrablobschedule

Logging configuration

log.color

log.format

log.level

log.pid

Logging and RPC

rpc.addr

rpc.admin-state

rpc.enable-admin

rpc.port

Metrics and profiling

metrics.addr

metrics.enabled

metrics.port

pprof.addr

pprof.enabled

pprof.path

pprof.port

pprof.type

P2P networking

p2p.advertise.ip

p2p.advertise.tcp

p2p.advertise.udp

p2p.ban.duration

p2p.ban.peers

p2p.ban.threshold

p2p.bootnodes

p2p.disable

p2p.discovery.path

p2p.gossip.timestamp.threshold

p2p.listen.ip

p2p.listen.tcp

p2p.listen.udp

p2p.nat

p2p.netrestrict

p2p.no-discovery

p2p.peers.grace

p2p.peers.hi

p2p.peers.lo

p2p.peerstore.path

p2p.priv.path

p2p.scoring