bitcoind --help
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bitcoind --help
Bitcoin Core version v24.0.1
Usage: bitcoind [options] Start Bitcoin Core
Options:
-?
Print this help message and exit
-alertnotify=<cmd>
Execute command when an alert is raised (%s in cmd is replaced by
message)
-assumevalid=<hex>
If this block is in the chain assume that it and its ancestors are valid
and potentially skip their script verification (0 to verify all,
default:
00000000000000000009c97098b5295f7e5f183ac811fb5d1534040adb93cabd,
testnet:
0000000000000004877fa2d36316398528de4f347df2f8a96f76613a298ce060,
signet:
000000d1a0e224fa4679d2fb2187ba55431c284fa1b74cbc8cfda866fd4d2c09)
-blockfilterindex=<type>
Maintain an index of compact filters by block (default: 0, values:
basic). If <type> is not supplied or if <type> = 1, indexes for
all known types are enabled.
-blocknotify=<cmd>
Execute command when the best block changes (%s in cmd is replaced by
block hash)
-blockreconstructionextratxn=<n>
Extra transactions to keep in memory for compact block reconstructions
(default: 100)
-blocksdir=<dir>
Specify directory to hold blocks subdirectory for *.dat files (default:
<datadir>)
-blocksonly
Whether to reject transactions from network peers. Automatic broadcast
and rebroadcast of any transactions from inbound peers is
disabled, unless the peer has the 'forcerelay' permission. RPC
transactions are not affected. (default: 0)
-coinstatsindex
Maintain coinstats index used by the gettxoutsetinfo RPC (default: 0)
-conf=<file>
Specify path to read-only configuration file. Relative paths will be
prefixed by datadir location (only useable from command line, not
configuration file) (default: bitcoin.conf)
-daemon
Run in the background as a daemon and accept commands (default: 0)
-daemonwait
Wait for initialization to be finished before exiting. This implies
-daemon (default: 0)
-datadir=<dir>
Specify data directory
-dbcache=<n>
Maximum database cache size <n> MiB (4 to 16384, default: 450). In
addition, unused mempool memory is shared for this cache (see
-maxmempool).
-debuglogfile=<file>
Specify location of debug log file. Relative paths will be prefixed by a
net-specific datadir location. (-nodebuglogfile to disable;
default: debug.log)
-includeconf=<file>
Specify additional configuration file, relative to the -datadir path
(only useable from configuration file, not command line)
-loadblock=<file>
Imports blocks from external file on startup
-maxmempool=<n>
Keep the transaction memory pool below <n> megabytes (default: 300)
-maxorphantx=<n>
Keep at most <n> unconnectable transactions in memory (default: 100)
-mempoolexpiry=<n>
Do not keep transactions in the mempool longer than <n> hours (default:
336)
-par=<n>
Set the number of script verification threads (-1 to 15, 0 = auto, <0 =
leave that many cores free, default: 0)
-persistmempool
Whether to save the mempool on shutdown and load on restart (default: 1)
-pid=<file>
Specify pid file. Relative paths will be prefixed by a net-specific
datadir location. (default: bitcoind.pid)
-prune=<n>
Reduce storage requirements by enabling pruning (deleting) of old
blocks. This allows the pruneblockchain RPC to be called to
delete specific blocks and enables automatic pruning of old
blocks if a target size in MiB is provided. This mode is
incompatible with -txindex. Warning: Reverting this setting
requires re-downloading the entire blockchain. (default: 0 =
disable pruning blocks, 1 = allow manual pruning via RPC, >=550 =
automatically prune block files to stay under the specified
target size in MiB)
-reindex
Rebuild chain state and block index from the blk*.dat files on disk.
This will also rebuild active optional indexes.
-reindex-chainstate
Rebuild chain state from the currently indexed blocks. When in pruning
mode or if blocks on disk might be corrupted, use full -reindex
instead. Deactivate all optional indexes before running this.
-settings=<file>
Specify path to dynamic settings data file. Can be disabled with
-nosettings. File is written at runtime and not meant to be
edited by users (use bitcoin.conf instead for custom settings).
Relative paths will be prefixed by datadir location. (default:
settings.json)
-startupnotify=<cmd>
Execute command on startup.
-sysperms
Create new files with system default permissions, instead of umask 077
(only effective with disabled wallet functionality)
-txindex
Maintain a full transaction index, used by the getrawtransaction rpc
call (default: 0)
-version
Print version and exit
Connection options:
-addnode=<ip>
Add a node to connect to and attempt to keep the connection open (see
the addnode RPC help for more info). This option can be specified
multiple times to add multiple nodes; connections are limited to
8 at a time and are counted separately from the -maxconnections
limit.
-asmap=<file>
Specify asn mapping used for bucketing of the peers (default:
ip_asn.map). Relative paths will be prefixed by the net-specific
datadir location.
-bantime=<n>
Default duration (in seconds) of manually configured bans (default:
86400)
-bind=<addr>[:<port>][=onion]
Bind to given address and always listen on it (default: 0.0.0.0). Use
[host]:port notation for IPv6. Append =onion to tag any incoming
connections to that address and port as incoming Tor connections
(default: 127.0.0.1:8334=onion, testnet: 127.0.0.1:18334=onion,
signet: 127.0.0.1:38334=onion, regtest: 127.0.0.1:18445=onion)
-cjdnsreachable
If set, then this host is configured for CJDNS (connecting to fc00::/8
addresses would lead us to the CJDNS network, see doc/cjdns.md)
(default: 0)
-connect=<ip>
Connect only to the specified node; -noconnect disables automatic
connections (the rules for this peer are the same as for
-addnode). This option can be specified multiple times to connect
to multiple nodes.
-discover
Discover own IP addresses (default: 1 when listening and no -externalip
or -proxy)
-dns
Allow DNS lookups for -addnode, -seednode and -connect (default: 1)
-dnsseed
Query for peer addresses via DNS lookup, if low on addresses (default: 1
unless -connect used)
-externalip=<ip>
Specify your own public address
-fixedseeds
Allow fixed seeds if DNS seeds don't provide peers (default: 1)
-forcednsseed
Always query for peer addresses via DNS lookup (default: 0)
-i2pacceptincoming
If set and -i2psam is also set then incoming I2P connections are
accepted via the SAM proxy. If this is not set but -i2psam is set
then only outgoing connections will be made to the I2P network.
Ignored if -i2psam is not set. Listening for incoming I2P
connections is done through the SAM proxy, not by binding to a
local address and port (default: 1)
-i2psam=<ip:port>
I2P SAM proxy to reach I2P peers and accept I2P connections (default:
none)
-listen
Accept connections from outside (default: 1 if no -proxy or -connect)
-listenonion
Automatically create Tor onion service (default: 1)
-maxconnections=<n>
Maintain at most <n> connections to peers (default: 125). This limit
does not apply to connections manually added via -addnode or the
addnode RPC, which have a separate limit of 8.
-maxreceivebuffer=<n>
Maximum per-connection receive buffer, <n>*1000 bytes (default: 5000)
-maxsendbuffer=<n>
Maximum per-connection send buffer, <n>*1000 bytes (default: 1000)
-maxtimeadjustment
Maximum allowed median peer time offset adjustment. Local perspective of
time may be influenced by outbound peers forward or backward by
this amount (default: 4200 seconds).
-maxuploadtarget=<n>
Tries to keep outbound traffic under the given target per 24h. Limit
does not apply to peers with 'download' permission or blocks
created within past week. 0 = no limit (default: 0M). Optional
suffix units [k|K|m|M|g|G|t|T] (default: M). Lowercase is 1000
base while uppercase is 1024 base
-natpmp
Use NAT-PMP to map the listening port (default: 0)
-networkactive
Enable all P2P network activity (default: 1). Can be changed by the
setnetworkactive RPC command
-onion=<ip:port>
Use separate SOCKS5 proxy to reach peers via Tor onion services, set
-noonion to disable (default: -proxy)
-onlynet=<net>
Make automatic outbound connections only to network <net> (ipv4, ipv6,
onion, i2p, cjdns). Inbound and manual connections are not
affected by this option. It can be specified multiple times to
allow multiple networks.
-peerblockfilters
Serve compact block filters to peers per BIP 157 (default: 0)
-peerbloomfilters
Support filtering of blocks and transaction with bloom filters (default:
0)
-port=<port>
Listen for connections on <port>. Nodes not using the default ports
(default: 8333, testnet: 18333, signet: 38333, regtest: 18444)
are unlikely to get incoming connections. Not relevant for I2P
(see doc/i2p.md).
-proxy=<ip:port>
Connect through SOCKS5 proxy, set -noproxy to disable (default:
disabled)
-proxyrandomize
Randomize credentials for every proxy connection. This enables Tor
stream isolation (default: 1)
-seednode=<ip>
Connect to a node to retrieve peer addresses, and disconnect. This
option can be specified multiple times to connect to multiple
nodes.
-timeout=<n>
Specify socket connection timeout in milliseconds. If an initial attempt
to connect is unsuccessful after this amount of time, drop it
(minimum: 1, default: 5000)
-torcontrol=<ip>:<port>
Tor control port to use if onion listening enabled (default:
127.0.0.1:9051)
-torpassword=<pass>
Tor control port password (default: empty)
-upnp
Use UPnP to map the listening port (default: 0)
-whitebind=<[permissions@]addr>
Bind to the given address and add permission flags to the peers
connecting to it. Use [host]:port notation for IPv6. Allowed
permissions: bloomfilter (allow requesting BIP37 filtered blocks
and transactions), noban (do not ban for misbehavior; implies
download), forcerelay (relay transactions that are already in the
mempool; implies relay), relay (relay even in -blocksonly mode,
and unlimited transaction announcements), mempool (allow
requesting BIP35 mempool contents), download (allow getheaders
during IBD, no disconnect after maxuploadtarget limit), addr
(responses to GETADDR avoid hitting the cache and contain random
records with the most up-to-date info). Specify multiple
permissions separated by commas (default:
download,noban,mempool,relay). Can be specified multiple times.
-whitelist=<[permissions@]IP address or network>
Add permission flags to the peers connecting from the given IP address
(e.g. 1.2.3.4) or CIDR-notated network (e.g. 1.2.3.0/24). Uses
the same permissions as -whitebind. Can be specified multiple
times.
Wallet options:
-addresstype
What type of addresses to use ("legacy", "p2sh-segwit", "bech32", or
"bech32m", default: "bech32")
-avoidpartialspends
Group outputs by address, selecting many (possibly all) or none, instead
of selecting on a per-output basis. Privacy is improved as
addresses are mostly swept with fewer transactions and outputs
are aggregated in clean change addresses. It may result in higher
fees due to less optimal coin selection caused by this added
limitation and possibly a larger-than-necessary number of inputs
being used. Always enabled for wallets with "avoid_reuse"
enabled, otherwise default: 0.
-changetype
What type of change to use ("legacy", "p2sh-segwit", "bech32", or
"bech32m"). Default is "legacy" when -addresstype=legacy, else it
is an implementation detail.
-consolidatefeerate=<amt>
The maximum feerate (in BTC/kvB) at which transaction building may use
more inputs than strictly necessary so that the wallet's UTXO
pool can be reduced (default: 0.0001).
-disablewallet
Do not load the wallet and disable wallet RPC calls
-discardfee=<amt>
The fee rate (in BTC/kvB) that indicates your tolerance for discarding
change by adding it to the fee (default: 0.0001). Note: An output
is discarded if it is dust at this rate, but we will always
discard up to the dust relay fee and a discard fee above that is
limited by the fee estimate for the longest target
-fallbackfee=<amt>
A fee rate (in BTC/kvB) that will be used when fee estimation has
insufficient data. 0 to entirely disable the fallbackfee feature.
(default: 0.00)
-keypool=<n>
Set key pool size to <n> (default: 1000). Warning: Smaller sizes may
increase the risk of losing funds when restoring from an old
backup, if none of the addresses in the original keypool have
been used.
-maxapsfee=<n>
Spend up to this amount in additional (absolute) fees (in BTC) if it
allows the use of partial spend avoidance (default: 0.00)
-mintxfee=<amt>
Fee rates (in BTC/kvB) smaller than this are considered zero fee for
transaction creation (default: 0.00001)
-paytxfee=<amt>
Fee rate (in BTC/kvB) to add to transactions you send (default: 0.00)
-signer=<cmd>
External signing tool, see doc/external-signer.md
-spendzeroconfchange
Spend unconfirmed change when sending transactions (default: 1)
-txconfirmtarget=<n>
If paytxfee is not set, include enough fee so transactions begin
confirmation on average within n blocks (default: 6)
-wallet=<path>
Specify wallet path to load at startup. Can be used multiple times to
load multiple wallets. Path is to a directory containing wallet
data and log files. If the path is not absolute, it is
interpreted relative to <walletdir>. This only loads existing
wallets and does not create new ones. For backwards compatibility
this also accepts names of existing top-level data files in
<walletdir>.
-walletbroadcast
Make the wallet broadcast transactions (default: 1)
-walletdir=<dir>
Specify directory to hold wallets (default: <datadir>/wallets if it
exists, otherwise <datadir>)
-walletnotify=<cmd>
Execute command when a wallet transaction changes. %s in cmd is replaced
by TxID, %w is replaced by wallet name, %b is replaced by the
hash of the block including the transaction (set to 'unconfirmed'
if the transaction is not included) and %h is replaced by the
block height (-1 if not included). %w is not currently
implemented on windows. On systems where %w is supported, it
should NOT be quoted because this would break shell escaping used
to invoke the command.
-walletrbf
Send transactions with full-RBF opt-in enabled (RPC only, default: 1)
ZeroMQ notification options: -zmqpubhashblock=<address> Enable publish hash block in <address> -zmqpubhashblockhwm=<n> Set publish hash block outbound message high water mark (default: 1000)
-zmqpubhashtx=<address>
Enable publish hash transaction in <address>
-zmqpubhashtxhwm=<n>
Set publish hash transaction outbound message high water mark (default:
1000)
-zmqpubrawblock=<address>
Enable publish raw block in <address>
-zmqpubrawblockhwm=<n>
Set publish raw block outbound message high water mark (default: 1000)
-zmqpubrawtx=<address>
Enable publish raw transaction in <address>
-zmqpubrawtxhwm=<n>
Set publish raw transaction outbound message high water mark (default:
1000)
-zmqpubsequence=<address>
Enable publish hash block and tx sequence in <address>
-zmqpubsequencehwm=<n>
Set publish hash sequence message high water mark (default: 1000)
Debugging/Testing options:
-debug=<category>
Output debug and trace logging (default: -nodebug, supplying <category>
is optional). If <category> is not supplied or if <category> = 1,
output all debug and trace logging. <category> can be: addrman,
bench, blockstorage, cmpctblock, coindb, estimatefee, http, i2p,
ipc, leveldb, libevent, mempool, mempoolrej, net, proxy, prune,
qt, rand, reindex, rpc, selectcoins, tor, util, validation,
walletdb, zmq. This option can be specified multiple times to
output multiple categories.
-debugexclude=<category>
Exclude debug and trace logging for a category. Can be used in
conjunction with -debug=1 to output debug and trace logging for
all categories except the specified category. This option can be
specified multiple times to exclude multiple categories.
-help-debug
Print help message with debugging options and exit
-logips
Include IP addresses in debug output (default: 0)
-logsourcelocations
Prepend debug output with name of the originating source location
(source file, line number and function name) (default: 0)
-logthreadnames
Prepend debug output with name of the originating thread (only available
on platforms supporting thread_local) (default: 0)
-logtimestamps
Prepend debug output with timestamp (default: 1)
-maxtxfee=<amt>
Maximum total fees (in BTC) to use in a single wallet transaction;
setting this too low may abort large transactions (default: 0.10)
-printtoconsole
Send trace/debug info to console (default: 1 when no -daemon. To disable
logging to file, set -nodebuglogfile)
-shrinkdebugfile
Shrink debug.log file on client startup (default: 1 when no -debug)
-uacomment=<cmt>
Append comment to the user agent string
Chain selection options:
-chain=<chain>
Use the chain <chain> (default: main). Allowed values: main, test,
signet, regtest
-signet
Use the signet chain. Equivalent to -chain=signet. Note that the network
is defined by the -signetchallenge parameter
-signetchallenge
Blocks must satisfy the given script to be considered valid (only for
signet networks; defaults to the global default signet test
network challenge)
-signetseednode
Specify a seed node for the signet network, in the hostname[:port]
format, e.g. sig.net:1234 (may be used multiple times to specify
multiple seed nodes; defaults to the global default signet test
network seed node(s))
-testnet
Use the test chain. Equivalent to -chain=test.
Node relay options:
-bytespersigop
Equivalent bytes per sigop in transactions for relay and mining
(default: 20)
-datacarrier
Relay and mine data carrier transactions (default: 1)
-datacarriersize
Maximum size of data in data carrier transactions we relay and mine
(default: 83)
-mempoolfullrbf
Accept transaction replace-by-fee without requiring replaceability
signaling (default: 0)
-minrelaytxfee=<amt>
Fees (in BTC/kvB) smaller than this are considered zero fee for
relaying, mining and transaction creation (default: 0.00001)
-permitbaremultisig
Relay non-P2SH multisig (default: 1)
-whitelistforcerelay
Add 'forcerelay' permission to whitelisted inbound peers with default
permissions. This will relay transactions even if the
transactions were already in the mempool. (default: 0)
-whitelistrelay
Add 'relay' permission to whitelisted inbound peers with default
permissions. This will accept relayed transactions even when not
relaying transactions (default: 1)
Block creation options:
-blockmaxweight=<n>
Set maximum BIP141 block weight (default: 3996000)
-blockmintxfee=<amt>
Set lowest fee rate (in BTC/kvB) for transactions to be included in
block creation. (default: 0.00001)
RPC server options:
-rest
Accept public REST requests (default: 0)
-rpcallowip=<ip>
Allow JSON-RPC connections from specified source. Valid for <ip> are a
single IP (e.g. 1.2.3.4), a network/netmask (e.g.
1.2.3.4/255.255.255.0) or a network/CIDR (e.g. 1.2.3.4/24). This
option can be specified multiple times
-rpcauth=<userpw>
Username and HMAC-SHA-256 hashed password for JSON-RPC connections. The
field <userpw> comes in the format: <USERNAME>:<SALT>$<HASH>. A
canonical python script is included in share/rpcauth. The client
then connects normally using the
rpcuser=<USERNAME>/rpcpassword=<PASSWORD> pair of arguments. This
option can be specified multiple times
-rpcbind=<addr>[:port]
Bind to given address to listen for JSON-RPC connections. Do not expose
the RPC server to untrusted networks such as the public internet!
This option is ignored unless -rpcallowip is also passed. Port is
optional and overrides -rpcport. Use [host]:port notation for
IPv6. This option can be specified multiple times (default:
127.0.0.1 and ::1 i.e., localhost)
-rpccookiefile=<loc>
Location of the auth cookie. Relative paths will be prefixed by a
net-specific datadir location. (default: data dir)
-rpcpassword=<pw>
Password for JSON-RPC connections
-rpcport=<port>
Listen for JSON-RPC connections on <port> (default: 8332, testnet:
18332, signet: 38332, regtest: 18443)
-rpcserialversion
Sets the serialization of raw transaction or block hex returned in
non-verbose mode, non-segwit(0) or segwit(1) (default: 1)
-rpcthreads=<n>
Set the number of threads to service RPC calls (default: 4)
-rpcuser=<user>
Username for JSON-RPC connections
-rpcwhitelist=<whitelist>
Set a whitelist to filter incoming RPC calls for a specific user. The
field <whitelist> comes in the format: <USERNAME>:<rpc 1>,<rpc
2>,...,<rpc n>. If multiple whitelists are set for a given user,
they are set-intersected. See -rpcwhitelistdefault documentation
for information on default whitelist behavior.
-rpcwhitelistdefault
Sets default behavior for rpc whitelisting. Unless rpcwhitelistdefault
is set to 0, if any -rpcwhitelist is set, the rpc server acts as
if all rpc users are subject to empty-unless-otherwise-specified
whitelists. If rpcwhitelistdefault is set to 1 and no
-rpcwhitelist is set, rpc server acts as if all rpc users are
subject to empty whitelists.
-server
Accept command line and JSON-RPC commands
See also[edit]
bitcoind, .bitcoin/, bitcoin.conf, Dockerfile, Bitcoind ports( 8332 18332 18443 8333 18333 18444 ), -chain, -datadir, -server, --help, Bitcoind logs, Bitcoind changelog- Bitcoin (
BTC), Bitcoin Cash (BCH), Wrapped Bitcoin (WBTC), blockchain.com, Coinbase, Cryptocurrency wallet, Ripple, Grayscale, Hummingbot, USD Coin, Zcash, Polkadot,bitcoin-cli, BSV, Bitmain, Hal Finney, List of bitcoin forks, Lightning Network, Minsc, SegWit, Bitcoin mining, BIP, Bech32, Ordinals, SPV, Bitcoin testnet, Satoshi Nakamoto, BRC-20, Bitcoin genesis block, Bitcoin address
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