Command-line Options
Last edited on May 16, 2025Geth is primarily controlled using the command line. Geth is started using the geth command. It is stopped by pressing ctrl-c.
You can configure Geth using command-line options (a.k.a. flags). Geth also has sub-commands, which can be used to invoke functionality such as the console or blockchain import/export.
The command-line help listing is reproduced below for your convenience. The same information can be obtained at any time from your own Geth instance by running:
geth --help
Commands
NAME:
geth - the go-ethereum command line interface
USAGE:
geth [global options] command [command options]
VERSION:
1.15.11-stable-36b2371c
COMMANDS:
account Manage accounts
attach Start an interactive JavaScript environment (connect to node)
console Start an interactive JavaScript environment
db Low level database operations
dump Dump a specific block from storage
dumpconfig Export configuration values in a TOML format
dumpgenesis Dumps genesis block JSON configuration to stdout
export Export blockchain into file
export-history Export blockchain history to Era archives
import Import a blockchain file
import-history Import an Era archive
import-preimages Import the preimage database from an RLP stream
init Bootstrap and initialize a new genesis block
js (DEPRECATED) Execute the specified JavaScript files
license Display license information
prune-history Prune blockchain history (block bodies and receipts) up to the merge block
removedb Remove blockchain and state databases
show-deprecated-flags Show flags that have been deprecated
snapshot A set of commands based on the snapshot
verkle A set of experimental verkle tree management commands
version Print version numbers
version-check Checks (online) for known Geth security vulnerabilities
wallet Manage Ethereum presale wallets
help, h Shows a list of commands or help for one command
GLOBAL OPTIONS:
ACCOUNT
--keystore value ($GETH_KEYSTORE)
Directory for the keystore (default = inside the datadir)
--lightkdf (default: false) ($GETH_LIGHTKDF)
Reduce key-derivation RAM & CPU usage at some expense of KDF strength
--password value ($GETH_PASSWORD)
Password file to use for non-interactive password input
--pcscdpath value (default: "/run/pcscd/pcscd.comm") ($GETH_PCSCDPATH)
Path to the smartcard daemon (pcscd) socket file
--signer value ($GETH_SIGNER)
External signer (url or path to ipc file)
--usb (default: false) ($GETH_USB)
Enable monitoring and management of USB hardware wallets
ALIASED (deprecated)
--allow-insecure-unlock (default: false) ($GETH_ALLOW_INSECURE_UNLOCK)
Allow insecure account unlocking when account-related RPCs are exposed by http
(deprecated)
--cache.trie.journal value ($GETH_CACHE_TRIE_JOURNAL)
Disk journal directory for trie cache to survive node restarts
--cache.trie.rejournal value (default: 0s) ($GETH_CACHE_TRIE_REJOURNAL)
Time interval to regenerate the trie cache journal
--light.egress value (default: 0) ($GETH_LIGHT_EGRESS)
Outgoing bandwidth limit for serving light clients (deprecated)
--light.ingress value (default: 0) ($GETH_LIGHT_INGRESS)
Incoming bandwidth limit for serving light clients (deprecated)
--light.maxpeers value (default: 0) ($GETH_LIGHT_MAXPEERS)
Maximum number of light clients to serve, or light servers to attach to
(deprecated)
--light.nopruning (default: false) ($GETH_LIGHT_NOPRUNING)
Disable ancient light chain data pruning (deprecated)
--light.nosyncserve (default: false) ($GETH_LIGHT_NOSYNCSERVE)
Enables serving light clients before syncing (deprecated)
--light.serve value (default: 0) ($GETH_LIGHT_SERVE)
Maximum percentage of time allowed for serving LES requests (deprecated)
--log.backtrace value ($GETH_LOG_BACKTRACE)
Request a stack trace at a specific logging statement (deprecated)
--log.debug (default: false) ($GETH_LOG_DEBUG)
Prepends log messages with call-site location (deprecated)
--metrics.expensive (default: false) ($GETH_METRICS_EXPENSIVE)
Enable expensive metrics collection and reporting (deprecated)
--mine (default: false) ($GETH_MINE)
Enable mining (deprecated)
--miner.etherbase value ($GETH_MINER_ETHERBASE)
0x prefixed public address for block mining rewards (deprecated)
--miner.newpayload-timeout value (default: 2s) ($GETH_MINER_NEWPAYLOAD_TIMEOUT)
Specify the maximum time allowance for creating a new payload (deprecated)
--nousb (default: false) ($GETH_NOUSB)
Disables monitoring for and managing USB hardware wallets (deprecated)
--rpc.enabledeprecatedpersonal (default: false) ($GETH_RPC_ENABLEDEPRECATEDPERSONAL)
This used to enable the 'personal' namespace.
--txlookuplimit value (default: 2350000) ($GETH_TXLOOKUPLIMIT)
Number of recent blocks to maintain transactions index for (default = about one
year, 0 = entire chain) (deprecated, use history.transactions instead)
--unlock value ($GETH_UNLOCK)
Comma separated list of accounts to unlock (deprecated)
--v5disc (default: false) ($GETH_V5DISC)
Enables the experimental RLPx V5 (Topic Discovery) mechanism (deprecated, use
--discv5 instead)
--whitelist value ($GETH_WHITELIST)
Comma separated block number-to-hash mappings to enforce (<number>=<hash>)
(deprecated in favor of --eth.requiredblocks)
API AND CONSOLE
--authrpc.addr value (default: "localhost") ($GETH_AUTHRPC_ADDR)
Listening address for authenticated APIs
--authrpc.jwtsecret value ($GETH_AUTHRPC_JWTSECRET)
Path to a JWT secret to use for authenticated RPC endpoints
--authrpc.port value (default: 8551) ($GETH_AUTHRPC_PORT)
Listening port for authenticated APIs
--authrpc.vhosts value (default: "localhost") ($GETH_AUTHRPC_VHOSTS)
Comma separated list of virtual hostnames from which to accept requests (server
enforced). Accepts '*' wildcard.
--exec value ($GETH_EXEC)
Execute JavaScript statement
--graphql (default: false) ($GETH_GRAPHQL)
Enable GraphQL on the HTTP-RPC server. Note that GraphQL can only be started if
an HTTP server is started as well.
--graphql.corsdomain value ($GETH_GRAPHQL_CORSDOMAIN)
Comma separated list of domains from which to accept cross origin requests
(browser enforced)
--graphql.vhosts value (default: "localhost") ($GETH_GRAPHQL_VHOSTS)
Comma separated list of virtual hostnames from which to accept requests (server
enforced). Accepts '*' wildcard.
--header value, -H value ($GETH_HEADER)
Pass custom headers to the RPC server when using --remotedb or the geth attach
console. This flag can be given multiple times.
--http (default: false) ($GETH_HTTP)
Enable the HTTP-RPC server
--http.addr value (default: "localhost") ($GETH_HTTP_ADDR)
HTTP-RPC server listening interface
--http.api value ($GETH_HTTP_API)
API's offered over the HTTP-RPC interface
--http.corsdomain value ($GETH_HTTP_CORSDOMAIN)
Comma separated list of domains from which to accept cross origin requests
(browser enforced)
--http.port value (default: 8545) ($GETH_HTTP_PORT)
HTTP-RPC server listening port
--http.rpcprefix value ($GETH_HTTP_RPCPREFIX)
HTTP path prefix on which JSON-RPC is served. Use '/' to serve on all paths.
--http.vhosts value (default: "localhost") ($GETH_HTTP_VHOSTS)
Comma separated list of virtual hostnames from which to accept requests (server
enforced). Accepts '*' wildcard.
--ipcdisable (default: false) ($GETH_IPCDISABLE)
Disable the IPC-RPC server
--ipcpath value ($GETH_IPCPATH)
Filename for IPC socket/pipe within the datadir (explicit paths escape it)
--jspath value (default: .) ($GETH_JSPATH)
JavaScript root path for `loadScript`
--preload value ($GETH_PRELOAD)
Comma separated list of JavaScript files to preload into the console
--rpc.allow-unprotected-txs (default: false) ($GETH_RPC_ALLOW_UNPROTECTED_TXS)
Allow for unprotected (non EIP155 signed) transactions to be submitted via RPC
--rpc.batch-request-limit value (default: 1000) ($GETH_RPC_BATCH_REQUEST_LIMIT)
Maximum number of requests in a batch
--rpc.batch-response-max-size value (default: 25000000) ($GETH_RPC_BATCH_RESPONSE_MAX_SIZE)
Maximum number of bytes returned from a batched call
--rpc.evmtimeout value (default: 5s) ($GETH_RPC_EVMTIMEOUT)
Sets a timeout used for eth_call (0=infinite)
--rpc.gascap value (default: 50000000) ($GETH_RPC_GASCAP)
Sets a cap on gas that can be used in eth_call/estimateGas (0=infinite)
--rpc.txfeecap value (default: 1) ($GETH_RPC_TXFEECAP)
Sets a cap on transaction fee (in ether) that can be sent via the RPC APIs (0 =
no cap)
--ws (default: false) ($GETH_WS)
Enable the WS-RPC server
--ws.addr value (default: "localhost") ($GETH_WS_ADDR)
WS-RPC server listening interface
--ws.api value ($GETH_WS_API)
API's offered over the WS-RPC interface
--ws.origins value ($GETH_WS_ORIGINS)
Origins from which to accept websockets requests
--ws.port value (default: 8546) ($GETH_WS_PORT)
WS-RPC server listening port
--ws.rpcprefix value ($GETH_WS_RPCPREFIX)
HTTP path prefix on which JSON-RPC is served. Use '/' to serve on all paths.
BEACON CHAIN
--beacon.api value ($GETH_BEACON_API)
Beacon node (CL) light client API URL. This flag can be given multiple times.
--beacon.api.header value ($GETH_BEACON_API_HEADER)
Pass custom HTTP header fields to the remote beacon node API in "key:value"
format. This flag can be given multiple times.
--beacon.checkpoint value ($GETH_BEACON_CHECKPOINT)
Beacon chain weak subjectivity checkpoint block hash
--beacon.checkpoint.file value ($GETH_BEACON_CHECKPOINT_FILE)
Beacon chain weak subjectivity checkpoint import/export file
--beacon.config value ($GETH_BEACON_CONFIG)
Beacon chain config YAML file
--beacon.genesis.gvroot value ($GETH_BEACON_GENESIS_GVROOT)
Beacon chain genesis validators root
--beacon.genesis.time value (default: 0) ($GETH_BEACON_GENESIS_TIME)
Beacon chain genesis time
--beacon.nofilter (default: false) ($GETH_BEACON_NOFILTER)
Disable future slot signature filter
--beacon.threshold value (default: 342) ($GETH_BEACON_THRESHOLD)
Beacon sync committee participation threshold
DEVELOPER CHAIN
--dev (default: false) ($GETH_DEV)
Ephemeral proof-of-authority network with a pre-funded developer account, mining
enabled
--dev.gaslimit value (default: 11500000) ($GETH_DEV_GASLIMIT)
Initial block gas limit
--dev.period value (default: 0) ($GETH_DEV_PERIOD)
Block period to use in developer mode (0 = mine only if transaction pending)
ETHEREUM
--config value ($GETH_CONFIG)
TOML configuration file
--datadir value (default: /root/.ethereum) ($GETH_DATADIR)
Data directory for the databases and keystore
--datadir.ancient value ($GETH_DATADIR_ANCIENT)
Root directory for ancient data (default = inside chaindata)
--datadir.minfreedisk value ($GETH_DATADIR_MINFREEDISK)
Minimum free disk space in MB, once reached triggers auto shut down (default =
--cache.gc converted to MB, 0 = disabled)
--db.engine value ($GETH_DB_ENGINE)
Backing database implementation to use ('pebble' or 'leveldb')
--eth.requiredblocks value ($GETH_ETH_REQUIREDBLOCKS)
Comma separated block number-to-hash mappings to require for peering
(<number>=<hash>)
--exitwhensynced (default: false) ($GETH_EXITWHENSYNCED)
Exits after block synchronisation completes
--holesky (default: false) ($GETH_HOLESKY)
Holesky network: pre-configured proof-of-stake test network
--hoodi (default: false) ($GETH_HOODI)
Hoodi network: pre-configured proof-of-stake test network
--mainnet (default: false) ($GETH_MAINNET)
Ethereum mainnet
--networkid value (default: 0) ($GETH_NETWORKID)
Explicitly set network id (integer)(For testnets: use --sepolia, --holesky,
--hoodi instead)
--override.prague value (default: 0) ($GETH_OVERRIDE_PRAGUE)
Manually specify the Prague fork timestamp, overriding the bundled setting
--override.verkle value (default: 0) ($GETH_OVERRIDE_VERKLE)
Manually specify the Verkle fork timestamp, overriding the bundled setting
--sepolia (default: false) ($GETH_SEPOLIA)
Sepolia network: pre-configured proof-of-work test network
--snapshot (default: true) ($GETH_SNAPSHOT)
Enables snapshot-database mode (default = enable)
GAS PRICE ORACLE
--gpo.blocks value (default: 20) ($GETH_GPO_BLOCKS)
Number of recent blocks to check for gas prices
--gpo.ignoreprice value (default: 2) ($GETH_GPO_IGNOREPRICE)
Gas price below which gpo will ignore transactions
--gpo.maxprice value (default: 500000000000) ($GETH_GPO_MAXPRICE)
Maximum transaction priority fee (or gasprice before London fork) to be
recommended by gpo
--gpo.percentile value (default: 60) ($GETH_GPO_PERCENTILE)
Suggested gas price is the given percentile of a set of recent transaction gas
prices
LOGGING AND DEBUGGING
--go-execution-trace value ($GETH_GO_EXECUTION_TRACE)
Write Go execution trace to the given file
--log.compress (default: false) ($GETH_LOG_COMPRESS)
Compress the log files
--log.file value ($GETH_LOG_FILE)
Write logs to a file
--log.format value ($GETH_LOG_FORMAT)
Log format to use (json|logfmt|terminal)
--log.maxage value (default: 30) ($GETH_LOG_MAXAGE)
Maximum number of days to retain a log file
--log.maxbackups value (default: 10) ($GETH_LOG_MAXBACKUPS)
Maximum number of log files to retain
--log.maxsize value (default: 100) ($GETH_LOG_MAXSIZE)
Maximum size in MBs of a single log file
--log.rotate (default: false) ($GETH_LOG_ROTATE)
Enables log file rotation
--log.vmodule value ($GETH_LOG_VMODULE)
Per-module verbosity: comma-separated list of <pattern>=<level> (e.g.
eth/*=5,p2p=4)
--pprof (default: false) ($GETH_PPROF)
Enable the pprof HTTP server
--pprof.addr value (default: "127.0.0.1") ($GETH_PPROF_ADDR)
pprof HTTP server listening interface
--pprof.blockprofilerate value (default: 0) ($GETH_PPROF_BLOCKPROFILERATE)
Turn on block profiling with the given rate
--pprof.cpuprofile value ($GETH_PPROF_CPUPROFILE)
Write CPU profile to the given file
--pprof.memprofilerate value (default: 524288) ($GETH_PPROF_MEMPROFILERATE)
Turn on memory profiling with the given rate
--pprof.port value (default: 6060) ($GETH_PPROF_PORT)
pprof HTTP server listening port
--remotedb value ($GETH_REMOTEDB)
URL for remote database
--verbosity value (default: 3) ($GETH_VERBOSITY)
Logging verbosity: 0=silent, 1=error, 2=warn, 3=info, 4=debug, 5=detail
METRICS AND STATS
--ethstats value ($GETH_ETHSTATS)
Reporting URL of a ethstats service (nodename:secret@host:port)
--metrics (default: false) ($GETH_METRICS)
Enable metrics collection and reporting
--metrics.addr value ($GETH_METRICS_ADDR)
Enable stand-alone metrics HTTP server listening interface.
--metrics.influxdb (default: false) ($GETH_METRICS_INFLUXDB)
Enable metrics export/push to an external InfluxDB database
--metrics.influxdb.bucket value (default: "geth") ($GETH_METRICS_INFLUXDB_BUCKET)
InfluxDB bucket name to push reported metrics to (v2 only)
--metrics.influxdb.database value (default: "geth") ($GETH_METRICS_INFLUXDB_DATABASE)
InfluxDB database name to push reported metrics to
--metrics.influxdb.endpoint value (default: "http://localhost:8086") ($GETH_METRICS_INFLUXDB_ENDPOINT)
InfluxDB API endpoint to report metrics to
--metrics.influxdb.organization value (default: "geth") ($GETH_METRICS_INFLUXDB_ORGANIZATION)
InfluxDB organization name (v2 only)
--metrics.influxdb.password value (default: "test") ($GETH_METRICS_INFLUXDB_PASSWORD)
Password to authorize access to the database
--metrics.influxdb.tags value (default: "host=localhost") ($GETH_METRICS_INFLUXDB_TAGS)
Comma-separated InfluxDB tags (key/values) attached to all measurements
--metrics.influxdb.token value (default: "test") ($GETH_METRICS_INFLUXDB_TOKEN)
Token to authorize access to the database (v2 only)
--metrics.influxdb.username value (default: "test") ($GETH_METRICS_INFLUXDB_USERNAME)
Username to authorize access to the database
--metrics.influxdbv2 (default: false) ($GETH_METRICS_INFLUXDBV2)
Enable metrics export/push to an external InfluxDB v2 database
--metrics.port value (default: 6060) ($GETH_METRICS_PORT)
Metrics HTTP server listening port.
Please note that --metrics.addr must be set
to start the server.
MINER
--miner.extradata value ($GETH_MINER_EXTRADATA)
Block extra data set by the miner (default = client version)
--miner.gaslimit value (default: 36000000) ($GETH_MINER_GASLIMIT)
Target gas ceiling for mined blocks
--miner.gasprice value (default: 1000000) ($GETH_MINER_GASPRICE)
Minimum gas price for mining a transaction
--miner.pending.feeRecipient value ($GETH_MINER_PENDING_FEERECIPIENT)
0x prefixed public address for the pending block producer (not used for actual
block production)
--miner.recommit value (default: 2s) ($GETH_MINER_RECOMMIT)
Time interval to recreate the block being mined
MISC
--help, -h (default: false)
show help
--synctarget value ($GETH_SYNCTARGET)
Hash of the block to full sync to (dev testing feature)
--version, -v (default: false)
print the version
NETWORKING
--bootnodes value ($GETH_BOOTNODES)
Comma separated enode URLs for P2P discovery bootstrap
--discovery.dns value ($GETH_DISCOVERY_DNS)
Sets DNS discovery entry points (use "" to disable DNS)
--discovery.port value (default: 30303) ($GETH_DISCOVERY_PORT)
Use a custom UDP port for P2P discovery
--discovery.v4, --discv4 (default: true) ($GETH_DISCOVERY_V4)
Enables the V4 discovery mechanism
--discovery.v5, --discv5 (default: true) ($GETH_DISCOVERY_V5)
Enables the V5 discovery mechanism
--identity value ($GETH_IDENTITY)
Custom node name
--maxpeers value (default: 50) ($GETH_MAXPEERS)
Maximum number of network peers (network disabled if set to 0)
--maxpendpeers value (default: 0) ($GETH_MAXPENDPEERS)
Maximum number of pending connection attempts (defaults used if set to 0)
--nat value (default: "any") ($GETH_NAT)
NAT port mapping mechanism
(any|none|upnp|pmp|pmp:<IP>|extip:<IP>|stun:<IP:PORT>)
--netrestrict value ($GETH_NETRESTRICT)
Restricts network communication to the given IP networks (CIDR masks)
--nodekey value ($GETH_NODEKEY)
P2P node key file
--nodekeyhex value ($GETH_NODEKEYHEX)
P2P node key as hex (for testing)
--nodiscover (default: false) ($GETH_NODISCOVER)
Disables the peer discovery mechanism (manual peer addition)
--port value (default: 30303) ($GETH_PORT)
Network listening port
PERFORMANCE TUNING
--cache value (default: 1024) ($GETH_CACHE)
Megabytes of memory allocated to internal caching (default = 4096 mainnet full
node, 128 light mode)
--cache.blocklogs value (default: 32) ($GETH_CACHE_BLOCKLOGS)
Size (in number of blocks) of the log cache for filtering
--cache.database value (default: 50) ($GETH_CACHE_DATABASE)
Percentage of cache memory allowance to use for database io
--cache.gc value (default: 25) ($GETH_CACHE_GC)
Percentage of cache memory allowance to use for trie pruning (default = 25% full
mode, 0% archive mode)
--cache.noprefetch (default: false) ($GETH_CACHE_NOPREFETCH)
Disable heuristic state prefetch during block import (less CPU and disk IO, more
time waiting for data)
--cache.preimages (default: false) ($GETH_CACHE_PREIMAGES)
Enable recording the SHA3/keccak preimages of trie keys
--cache.snapshot value (default: 10) ($GETH_CACHE_SNAPSHOT)
Percentage of cache memory allowance to use for snapshot caching (default = 10%
full mode, 20% archive mode)
--cache.trie value (default: 15) ($GETH_CACHE_TRIE)
Percentage of cache memory allowance to use for trie caching (default = 15% full
mode, 30% archive mode)
--crypto.kzg value (default: "gokzg") ($GETH_CRYPTO_KZG)
KZG library implementation to use; gokzg (recommended) or ckzg
--fdlimit value (default: 0) ($GETH_FDLIMIT)
Raise the open file descriptor resource limit (default = system fd limit)
STATE HISTORY MANAGEMENT
--gcmode value (default: "full") ($GETH_GCMODE)
Blockchain garbage collection mode, only relevant in state.scheme=hash ("full",
"archive")
--history.chain value (default: "all") ($GETH_HISTORY_CHAIN)
Blockchain history retention ("all" or "postmerge")
--history.logs value (default: 2350000) ($GETH_HISTORY_LOGS)
Number of recent blocks to maintain log search index for (default = about one
year, 0 = entire chain)
--history.logs.disable (default: false) ($GETH_HISTORY_LOGS_DISABLE)
Do not maintain log search index
--history.logs.export value ($GETH_HISTORY_LOGS_EXPORT)
Export checkpoints to file in go source file format
--history.state value (default: 90000) ($GETH_HISTORY_STATE)
Number of recent blocks to retain state history for, only relevant in
state.scheme=path (default = 90,000 blocks, 0 = entire chain)
--history.transactions value (default: 2350000) ($GETH_HISTORY_TRANSACTIONS)
Number of recent blocks to maintain transactions index for (default = about one
year, 0 = entire chain)
--state.scheme value ($GETH_STATE_SCHEME)
Scheme to use for storing ethereum state ('hash' or 'path')
--syncmode value (default: "snap") ($GETH_SYNCMODE)
Blockchain sync mode ("snap" or "full")
TRANSACTION POOL (BLOB)
--blobpool.datacap value (default: 2684354560) ($GETH_BLOBPOOL_DATACAP)
Disk space to allocate for pending blob transactions (soft limit)
--blobpool.datadir value (default: "blobpool") ($GETH_BLOBPOOL_DATADIR)
Data directory to store blob transactions in
--blobpool.pricebump value (default: 100) ($GETH_BLOBPOOL_PRICEBUMP)
Price bump percentage to replace an already existing blob transaction
TRANSACTION POOL (EVM)
--txpool.accountqueue value (default: 64) ($GETH_TXPOOL_ACCOUNTQUEUE)
Maximum number of non-executable transaction slots permitted per account
--txpool.accountslots value (default: 16) ($GETH_TXPOOL_ACCOUNTSLOTS)
Minimum number of executable transaction slots guaranteed per account
--txpool.globalqueue value (default: 1024) ($GETH_TXPOOL_GLOBALQUEUE)
Maximum number of non-executable transaction slots for all accounts
--txpool.globalslots value (default: 5120) ($GETH_TXPOOL_GLOBALSLOTS)
Maximum number of executable transaction slots for all accounts
--txpool.journal value (default: "transactions.rlp") ($GETH_TXPOOL_JOURNAL)
Disk journal for local transaction to survive node restarts
--txpool.lifetime value (default: 3h0m0s) ($GETH_TXPOOL_LIFETIME)
Maximum amount of time non-executable transaction are queued
--txpool.locals value ($GETH_TXPOOL_LOCALS)
Comma separated accounts to treat as locals (no flush, priority inclusion)
--txpool.nolocals (default: false) ($GETH_TXPOOL_NOLOCALS)
Disables price exemptions for locally submitted transactions
--txpool.pricebump value (default: 10) ($GETH_TXPOOL_PRICEBUMP)
Price bump percentage to replace an already existing transaction
--txpool.pricelimit value (default: 1) ($GETH_TXPOOL_PRICELIMIT)
Minimum gas price tip to enforce for acceptance into the pool
--txpool.rejournal value (default: 1h0m0s) ($GETH_TXPOOL_REJOURNAL)
Time interval to regenerate the local transaction journal
VIRTUAL MACHINE
--vmdebug (default: false) ($GETH_VMDEBUG)
Record information useful for VM and contract debugging
--vmtrace value ($GETH_VMTRACE)
Name of tracer which should record internal VM operations (costly)
--vmtrace.jsonconfig value (default: "{}") ($GETH_VMTRACE_JSONCONFIG)
Tracer configuration (JSON)
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