bitcoind - manual page for bitcoind v0.23.1
bitcoind [options] Start Bitcoin ABC
Bitcoin ABC version v0.23.1
Print this help message and exit
Execute command when a relevant alert is received or we see a really long fork (%s in cmd is replaced by message)
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: 00000000000000005ce0908e5a27e2f4c202f9f44445afff0899d254439f8480, testnet: 000000000b94431d3622a1d05fc092a9859a898c1d866e8b616483de212c3a4a)
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.
Execute command when the best block changes (%s in cmd is replaced by block hash)
Extra transactions to keep in memory for compact block reconstructions (default: 100)
Specify directory to hold blocks subdirectory for *.dat files (default: <datadir>)
and rebroadcast of any transactions from inbound peers is disabled, unless '-whitelistforcerelay' is '1', in which case whitelisted peers' transactions will be relayed. RPC transactions are not affected. (default: 0)
Specify path to read-only configuration file. Relative paths will be prefixed by datadir location. (default: bitcoin.conf)
Run in the background as a daemon and accept commands
Specify data directory
Set database cache size in MiB (4 to 16384, default: 1024)
Specify location of debug log file. Relative paths will be prefixed by a net-specific datadir location. (0 to disable; default: debug.log)
Set the minimum amount of time to wait between a block header reception and the block finalization. Unit is seconds (default: 7200)
Specify additional configuration file, relative to the -datadir path (only useable from configuration file, not command line)
Imports blocks from external file on startup
Keep the transaction memory pool below <n> megabytes (default: 300)
Keep at most <n> unconnectable transactions in memory (default: 100)
Configure at what depth blocks are considered final (default: 10). Use -1 to disable.
Do not keep transactions in the mempool longer than <n> hours (default: 336)
Set the number of script verification threads (-4 to 15, 0 = auto, <0 = leave that many cores free, default: 0)
Whether to save the mempool on shutdown and load on restart (default: 1)
Specify pid file. Relative paths will be prefixed by a net-specific datadir location. (default: bitcoind.pid)
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 and -rescan. 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)
Rebuild chain state and block index from the blk*.dat files on disk
Rebuild chain state from the currently indexed blocks. When in pruning mode or if blocks on disk might be corrupted, use full -reindex instead.
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)
Create new files with system default permissions, instead of umask 077 (only effective with disabled wallet functionality)
Maintain a full transaction index, used by the getrawtransaction rpc call (default: 0)
Use Cash Address for destination encoding instead of base58 (activate by default on Jan, 14)
Print version and exit
Add a node to connect to and attempt to keep the connection open (see the `addnode` RPC command help for more info)
Specify asn mapping used for bucketing of the peers (default: ip_asn.map). Relative paths will be prefixed by the net-specific datadir location.
Default duration (in seconds) of manually configured bans (default: 86400)
Bind to given address and always listen on it. Use [host]:port notation for IPv6
Connect only to the specified node(s); -connect=0 disables automatic connections (the rules for this peer are the same as for -addnode)
Discover own IP addresses (default: 1 when listening and no -externalip or -proxy)
Allow DNS lookups for -addnode, -seednode and -connect (default: 1)
Query for peer addresses via DNS lookup, if low on addresses (default: 1 unless -connect used)
Specify your own public address
Always query for peer addresses via DNS lookup (default: 0)
Accept connections from outside (default: 1 if no -proxy or -connect)
Automatically create Tor hidden service (default: 1)
Maintain at most <n> connections to peers. The effective limit depends on system limitations and might be lower than the specified value (default: 4096)
Maximum per-connection receive buffer, <n>*1000 bytes (default: 5000)
Maximum per-connection send buffer, <n>*1000 bytes (default: 1000)
Maximum allowed median peer time offset adjustment. Local perspective of time may be influenced by peers forward or backward by this amount. (default: 4200 seconds)
Tries to keep outbound traffic under the given target (in MiB per 24h). Limit does not apply to peers with 'download' permission. 0 = no limit (default: 0)
Use separate SOCKS5 proxy to reach peers via Tor hidden services (default: -proxy)
Make outgoing connections only through network <net> (ipv4, ipv6 or onion). Incoming connections are not affected by this option. This option can be specified multiple times to allow multiple networks.
Serve compact block filters to peers per BIP 157 (default: 0)
Support filtering of blocks and transaction with bloom filters (default: 1)
Specify p2p connection timeout in seconds. This option determines the amount of time a peer may be inactive before the connection to it is dropped. (minimum: 1, default: 60)
Relay non-P2SH multisig (default: 1)
Listen for connections on <port> (default: 8333, testnet: 18333, regtest: 18444)
Connect through SOCKS5 proxy
Randomize credentials for every proxy connection. This enables Tor stream isolation (default: 1)
Connect to a node to retrieve peer addresses, and disconnect
Specify connection timeout in milliseconds (minimum: 1, default: 5000)
Tor control port to use if onion listening enabled (default: 127.0.0.1:9051)
Tor control port password (default: empty)
Use UPnP to map the listening port (default: 0)
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), mempool (allow requesting BIP35 mempool contents), download (allow getheaders during IBD, no disconnect after maxuploadtarget limit). Specify multiple permissions separated by commas (default: download,noban,mempool,relay). Can be specified multiple times.
-whitelist=<[[email protected]]IP address or network>
Add permission flags to the peers connecting from the given IP address (e.g. 18.104.22.168) or CIDR-notated network (e.g. 22.214.171.124/24). Uses the same permissions as -whitebind. Can be specified multiple times.
Group outputs by address, selecting all or none, instead of selecting on a per-output basis. Privacy is improved as an address is only used once (unless someone sends to it after spending from it), but may result in slightly higher fees as suboptimal coin selection may result due to the added limitation (default: 0 (always enabled for wallets with "avoid_reuse" enabled))
Do not load the wallet and disable wallet RPC calls
A fee rate (in BCHA/kB) that will be used when fee estimation has insufficient data. 0 to entirely disable the fallbackfee feature. (default: 0.00)
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.
Spend up to this amount in additional (absolute) fees (in BCHA) if it allows the use of partial spend avoidance (default: 0.00)
Fees (in BCHA/kB) smaller than this are considered zero fee for transaction creation (default: 0.00001)
Fee (in BCHA/kB) to add to transactions you send (default: 0.00)
Rescan the block chain for missing wallet transactions on startup
Spend unconfirmed change when sending transactions (default: 1)
Specify wallet database path. Can be specified multiple times to load multiple wallets. Path is interpreted relative to <walletdir> if it is not absolute, and will be created if it does not exist (as a directory containing a wallet.dat file and log files). For backwards compatibility this will also accept names of existing data files in <walletdir>.)
Make the wallet broadcast transactions (default: 1)
Specify directory to hold wallets (default: <datadir>/wallets if it exists, otherwise <datadir>)
Execute command when a wallet transaction changes. %s in cmd is replaced by TxID and %w is replaced by wallet name. %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.
Delete all wallet transactions and only recover those parts of the blockchain through -rescan on startup (1 = keep tx meta data e.g. payment request information, 2 = drop tx meta data)
ZeroMQ notification options:
Enable publish hash block in <address>
Set publish hash block outbound message high water mark (default: 1000)
Enable publish hash transaction in <address>
Set publish hash transaction outbound message high water mark (default: 1000)
Enable publish raw block in <address>
Set publish raw block outbound message high water mark (default: 1000)
Enable publish raw transaction in <address>
Set publish raw transaction outbound message high water mark (default: 1000)
Output debugging information (default: 0, supplying <category> is optional). If <category> is not supplied or if <category> = 1, output all debugging information. <category> can be: net, tor, mempool, http, bench, zmq, walletdb, rpc, estimatefee, addrman, selectcoins, reindex, cmpctblock, rand, prune, proxy, mempoolrej, libevent, coindb, qt, leveldb, validation.
Exclude debugging information for a category. Can be used in conjunction with -debug=1 to output debug logs for all categories except one or more specified categories.
Print help message with debugging options and exit
Include IP addresses in debug output (default: 0)
Prepend debug output with name of the originating thread (only available on platforms supporting thread_local) (default: 0)
Prepend debug output with timestamp (default: 1)
Maximum total fees (in BCHA) to use in a single wallet transaction or raw transaction; setting this too low may abort large transactions (default: 0.10)
Send trace/debug info to console instead of debug.log file (default: 1 when no -daemon. To disable logging to file, set debuglogfile=0)
Shrink debug.log file on client startup (default: 1 when no -debug)
Append comment to the user agent string
Chain selection options:
Use the chain <chain> (default: main). Allowed values: main, test, regtest
Use the test chain. Equivalent to -chain=test.
Node relay options:
Equivalent bytes per sigop in transactions for relay and mining (default: 50)
Relay and mine data carrier transactions (default: 1)
Maximum size of data in data carrier transactions we relay and mine (default: 223)
Fees (in BCHA/kB) smaller than this are rejected for relaying, mining and transaction creation (default: 0.00001)
Add 'forcerelay' permission to whitelisted inbound peers with default permissions. This will relay transactions even if the transactions were already in the mempool or violate local relay policy (default: 0)
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:
Set maximum block size in bytes (default: 2000000)
Set lowest fee rate (in BCHA/kB) for transactions to be included in block creation. (default: 0.00001)
RPC server options:
Accept public REST requests (default: 0)
Allow JSON-RPC connections from specified source. Valid for <ip> are a single IP (e.g. 126.96.36.199), a network/netmask (e.g. 188.8.131.52/255.255.255.0) or a network/CIDR (e.g. 184.108.40.206/24). This option can be specified multiple times
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
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)
Location of the auth cookie. Relative paths will be prefixed by a net-specific datadir location. (default: data dir)
Domain from which to accept cross origin requests (browser enforced)
Password for JSON-RPC connections
Listen for JSON-RPC connections on <port> (default: 8332, testnet: 18332, regtest: 18443)
Set the number of threads to service RPC calls (default: 4)
Username for JSON-RPC connections
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.
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.
Accept command line and JSON-RPC commands
Copyright (C) 2009-2021 The Bitcoin developers
Please contribute if you find Bitcoin ABC useful. Visit <https://www.bitcoinabc.org> for further information about the software. The source code is available from <https://github.com/Bitcoin-ABC/bitcoin-abc>.
This is experimental software. Distributed under the MIT software license, see the accompanying file COPYING or <https://opensource.org/licenses/MIT>
This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit <https://www.openssl.org> and cryptographic software written by Eric Young and UPnP software written by Thomas Bernard.