Command Line Options

Command line options can be used when starting your NIX core wallet or in the nix.conf configuration file. Startup options will override nix.conf entries.

Usage: nix-qt [command-line options] nixd [command-line options]


nixd -bind=

or add to the nix.conf file as: [option (without -)]=[value]




-? Print this help message and exit

-version Print version and exit

-alertnotify=<cmd> Execute command when a relevant alert is received or we see a really long fork (%s in cmd is replaced by message)

-blocknotify=<cmd> Execute command when the best block changes (%s in cmd is replaced by block hash)

-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: 0000000000000000000000000000000000000000000000000000000000000000, testnet: 0000000000000000000000000000000000000000000000000000000000000000)

-conf=<file> Specify configuration file (default: nix.conf)

-datadir=<dir> Specify data directory

-dbcache=<n> Set database cache size in megabytes (4 to 16384, default: 450)

-loadblock=<file> Imports blocks from external blk000??.dat file on startup

-debuglogfile=<file> Specify location of debug log file: this can be an absolute path or a path relative to the data directory (default: debug.log)

-maxorphantx=<n> Keep at most <n> unconnectable transactions in memory (default: 100)

-maxmempool=<n> Keep the transaction memory pool below <n> megabytes (default: 300)

-mempoolexpiry=<n> Do not keep transactions in the mempool longer than <n> hours (default: 336)

-persistmempool Whether to save the mempool on shutdown and load on restart (default: 1)

-blockreconstructionextratxn=<n> Extra transactions to keep in memory for compact block reconstructions (default: 100)

-par=<n> Set the number of script verification threads (-4 to 16, 0 = auto, <0 = leave that many cores free, default: 0)

-pid=<file> Specify pid file (default:

-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 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)

-reindex-chainstate Rebuild chain state from the currently indexed blocks

-reindex Rebuild chain state and block index from the blk*.dat files on disk

-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: 1)

-addressindex Maintain a full address index, used to query for the balance, txids and unspent outputs for addresses (default: 0)

-timestampindex Maintain a timestamp index for block hashes, used to query blocks hashes by a range of timestamps (default: 0)

-spentindex Maintain a full spent index, used to query the spending txid and input index for an outpoint (default: 0)

Connection options

-addnode=<ip> Add a node to connect to and attempt to keep the connection open (see the 'addnode' RPC command help for more info)

-banscore=<n> Threshold for disconnecting misbehaving peers (default: 100)

-bantime=<n> Number of seconds to keep misbehaving peers from reconnecting (default: 86400)

-bind=<addr> Bind to given address and always listen on it. Use [host]:port notation for IPv6

-connect=<ip> Connect only to the specified node(s); -connect=0 disables automatic connections (the rules for this peer are the same as for -addnode)

-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

-forcednsseed Always query for peer addresses via DNS lookup (default: 0)

-listen Accept connections from outside (default: 1 if no -proxy or -connect)

-listenonion Automatically create Tor hidden service (default: 1)

-maxconnections=<n> Maintain at most <n> connections to peers (default: 125)

-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 peers forward or backward by this amount. (default: 4200 seconds)

-onion=<ip:port> Use separate SOCKS5 proxy to reach peers via Tor hidden services (default: -proxy)

-onlynet=<net> Only connect to nodes in network <net> (ipv4, ipv6 or onion)

-permitbaremultisig Relay non-P2SH multisig (default: 1)

-peerbloomfilters Support filtering of blocks and transaction with bloom filters (default: 1)

-port=<port> Listen for connections on <port> (default: 6214 or testnet: 16214)

-proxy=<ip:port> Connect through SOCKS5 proxy

-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

-timeout=<n> Specify connection timeout in milliseconds (minimum: 1, default: 5000)

-torcontrol=<ip>:<port> Tor control port to use if onion listening enabled (default:

-torpassword=<pass> Tor control port password (default: empty)

-upnp Use UPnP to map the listening port (default: 0)

-whitebind=<addr> Bind to given address and whitelist peers connecting to it. Use [host]:port notation for IPv6

-whitelist=<IP address or network> Whitelist peers connecting from the given IP address (e.g. or CIDR notated network (e.g. Can be specified multiple times. Whitelisted peers cannot be DoS banned and their transactions are always relayed, even if they are already in the mempool, useful e.g. for a gateway

-maxuploadtarget=<n> Tries to keep outbound traffic under the given target (in MiB per 24h), 0 = no limit (default: 0)

Wallet options

-addresstype What type of addresses to use ("legacy", "p2sh-segwit", or "bech32", default: "p2sh-segwit")

-changetype What type of change to use ("legacy", "p2sh-segwit", or "bech32"). Default is same as -addresstype, except when -addresstype=p2sh-segwit a native segwit output is used when sending to a native segwit address)

-disablewallet Do not load the wallet and disable wallet RPC calls

-keypool=<n> Set key pool size to <n> (default: 1000)

-fallbackfee=<amt> A fee rate (in NIX/kB) that will be used when fee estimation has insufficient data (default: 0.0002)

-discardfee=<amt> The fee rate (in NIX/kB) 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

-mintxfee=<amt> Fees (in NIX/kB) smaller than this are considered zero fee for transaction creation (default: 0.00001)

-paytxfee=<amt> Fee (in NIX/kB) to add to transactions you send (default: 0.00)

-rescan Rescan the block chain for missing wallet transactions on startup

-salvagewallet Attempt to recover private keys from a corrupt wallet on startup

-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)

-walletrbf Send transactions with full-RBF opt-in enabled (RPC only, default: 0)

-upgradewallet Upgrade wallet to latest format on startup

-wallet=<file> Specify wallet file (within data directory) (default: wallet.dat)

-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)

-zapwallettxes=<mode> Delete all wallet transactions and only recover those parts of the blockchain through -rescan on startup (1 = keep tx meta data e.g. account owner and payment request information, 2 = drop tx meta data)

Wallet staking options

-staking Stake your coins to support network and gain reward (default: true)

-stakingthreads Number of threads to start for staking, max 1 per active wallet, will divide wallets evenly between threads (default: 1)

-minstakeinterval=<n> Minimum time in seconds between successful stakes (default: 0)

-minersleep=<n> Milliseconds between stake attempts. Lowering this param will not result in more stakes. (default: 500)

-reservebalance=<amount> Ensure available balance remains above reservebalance. (default: 0)

-donationpercent=<n> Percentage of block reward donated to the donation address. e.g. 1190 (11.90%) (default: 0)

-donationaddress=<n> Destination to send donated staking rewards. (default: N/A)

-stakesplitthreshold=<n> Maximum amount of coins to stake before splitting into two outputs. (default: 10000)

-stakecombinethreshold=<n> Minimum amount of NIX to combine into one stake if wallet has multiple outputs to stake. (default: 5000)

-maxstakecombine=<n> Maximim of outputs to combine when achieving stakecombinethreshold. (default: 3)

-generatenewstakingaddress Create new bech32 addresses on successful stakes. (default: false)

-minimumleasepercentage=<n> Minimum lease percentage required for a contract to stake if you are leasing stakes. Value can be between 0 and 10000 e.g. 1191 (11.91%) (default: 0)

-leaserewardaddresses=<n> Stake only LPoS contracts with reward fee addresses specified by this command. e.g. x1,x2,x3 (default: "")

-leaserewardtome=<n> Stake only LPoS contracts with reward fee addresses that this local wallet owns <true/false> (default: false)

-dxmode Set wallet change and default addressing to legacy for third-party dx support (default: false)

ZeroMQ notification options

-zmqpubhashblock=<address> Enable publish hash block in <address>

-zmqpubhashtx=<address> Enable publish hash transaction in <address>

-zmqpubrawblock=<address> Enable publish raw block in <address>

-zmqpubrawtx=<address> Enable publish raw transaction in <address>

Debugging/Testing options

-uacomment=<cmt> Append comment to the user agent string

-debug=<category> 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, db, rpc, estimatefee, addrman, selectcoins, reindex, cmpctblock, rand, prune, proxy, mempoolrej, libevent, coindb, qt, leveldb.

-debugexclude=<category> 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.

-help-debug Show all debugging options (usage: --help -help-debug)

-logips Include IP addresses in debug output (default: 0)

-logtimestamps Prepend debug output with timestamp (default: 1)

-maxtxfee=<amt> Maximum total fees (in NIX) to use in a single wallet transaction or raw transaction; setting this too low may abort large transactions (default: 0.10)

-printtoconsole Send trace/debug info to console instead of debug.log file

-shrinkdebugfile Shrink debug.log file on client startup (default: 1 when no -debug)

Chain selection options

-testnet Use the test chain

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)

-mempoolreplacement Enable transaction replacement in the memory pool (default: 1)

-minrelaytxfee=<amt> Fees (in NIX/kB) smaller than this are considered zero fee for relaying, mining and transaction creation (default: 0.00001)

-whitelistrelay Accept relayed transactions received from whitelisted peers even when not relaying transactions (default: 1)

-whitelistforcerelay Force relay of transactions from whitelisted peers even if they violate local relay policy (default: 1)

Block creation options

-blockmaxweight=<n> Set maximum BIP141 block weight (default: 3996000)

-blockmaxsize=<n> Set maximum BIP141 block weight to this * 4. Deprecated, use blockmaxweight

-blockmintxfee=<amt> Set lowest fee rate (in NIX/kB) for transactions to be included in block creation. (default: 0.00001)

RPC server options

-server Accept command line and JSON-RPC commands

-rest Accept public REST requests (default: 0)

-rpcbind=<addr>[:port] Bind to given address to listen for JSON-RPC connections. 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: and ::1 i.e., localhost, or if -rpcallowip has been specified, and :: i.e., all addresses)

-rpccookiefile=<loc> Location of the auth cookie (default: data dir)

-rpcuser=<user> Username for JSON-RPC connections

-rpcpassword=<pw> Password for JSON-RPC connections

-rpcauth=<userpw> Username and hashed password for JSON-RPC connections. The field <userpw> comes in the format: <USERNAME>:<SALT>$<HASH>. A canonical python script is included in share/rpcuser. The client then connects normally using the rpcuser=<USERNAME>/rpcpassword=<PASSWORD> pair of arguments. This option can be specified multiple times

-rpcport=<port> Listen for JSON-RPC connections on <port> (default: 6215 or testnet: 16215)

-rpcallowip=<ip> Allow JSON-RPC connections from specified source. Valid for <ip> are a single IP (e.g., a network/netmask (e.g. or a network/CIDR (e.g. This option can be specified multiple times

-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)

UI options

-choosedatadir Choose data directory on startup (default: 0)

-lang=<lang> Set language, for example "de_DE" (default: system locale)

-min Start minimized

-rootcertificates=<file> Set SSL root certificates for payment request (default: -system-)

-splash Show splash screen on startup (default: 1)

-resetguisettings Reset all settings changed in the GUI