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doc/files.md
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`blocks/index/` | LevelDB database | Block index; `-blocksdir` option does not affect this path | `blocks/index/` | LevelDB database | Block index; `-blocksdir` option does not affect this path | ||||
`blocks/` | `blkNNNNN.dat`<sup>[\[2\]](#note2)</sup> | Actual Bitcoin blocks (in network format, dumped in raw on disk, 128 MiB per file) | `blocks/` | `blkNNNNN.dat`<sup>[\[2\]](#note2)</sup> | Actual Bitcoin blocks (in network format, dumped in raw on disk, 128 MiB per file) | ||||
`blocks/` | `revNNNNN.dat`<sup>[\[2\]](#note2)</sup> | Block undo data (custom format) | `blocks/` | `revNNNNN.dat`<sup>[\[2\]](#note2)</sup> | Block undo data (custom format) | ||||
`chainstate/` | LevelDB database | Blockchain state (a compact representation of all currently unspent transaction outputs and some metadata about the transactions they are from) | `chainstate/` | LevelDB database | Blockchain state (a compact representation of all currently unspent transaction outputs and some metadata about the transactions they are from) | ||||
`indexes/txindex/` | LevelDB database | Transaction index; *optional*, used if `-txindex=1` | `indexes/txindex/` | LevelDB database | Transaction index; *optional*, used if `-txindex=1` | ||||
`indexes/blockfilter/basic/db/` | LevelDB database | Blockfilter index LevelDB database for the basic filtertype; *optional*, used if `-blockfilterindex=basic` | `indexes/blockfilter/basic/db/` | LevelDB database | Blockfilter index LevelDB database for the basic filtertype; *optional*, used if `-blockfilterindex=basic` | ||||
`indexes/blockfilter/basic/` | `fltrNNNNN.dat`<sup>[\[2\]](#note2)</sup> | Blockfilter index filters for the basic filtertype; *optional*, used if `-blockfilterindex=basic` | `indexes/blockfilter/basic/` | `fltrNNNNN.dat`<sup>[\[2\]](#note2)</sup> | Blockfilter index filters for the basic filtertype; *optional*, used if `-blockfilterindex=basic` | ||||
`wallets/` | | [Contains wallets](#multi-wallet-environment); can be specified by `-walletdir` option; if `wallets/` subdirectory does not exist, a wallet resides in the data directory | `wallets/` | | [Contains wallets](#multi-wallet-environment); can be specified by `-walletdir` option; if `wallets/` subdirectory does not exist, a wallet resides in the data directory | ||||
`./` | `anchors.dat` | Anchor IP address database, created on shutdown and deleted at startup. Anchors are last known outgoing block-relay-only peers that are tried to re-connect to on startup | |||||
`./` | `banlist.dat` | Stores the IPs/subnets of banned nodes | `./` | `banlist.dat` | Stores the IPs/subnets of banned nodes | ||||
`./` | `bitcoin.conf` | User-defined [configuration settings](bitcoin-conf.md) for `bitcoind` or `bitcoin-qt`. File is not written to by the software and must be created manually. Path can be specified by `-conf` option | `./` | `bitcoin.conf` | User-defined [configuration settings](bitcoin-conf.md) for `bitcoind` or `bitcoin-qt`. File is not written to by the software and must be created manually. Path can be specified by `-conf` option | ||||
`./` | `bitcoind.pid` | Stores the process ID (PID) of `bitcoind` or `bitcoin-qt` while running; created at start and deleted on shutdown; can be specified by `-pid` option | `./` | `bitcoind.pid` | Stores the process ID (PID) of `bitcoind` or `bitcoin-qt` while running; created at start and deleted on shutdown; can be specified by `-pid` option | ||||
`./` | `debug.log` | Contains debug information and general logging generated by `bitcoind` or `bitcoin-qt`; can be specified by `-debuglogfile` option | `./` | `debug.log` | Contains debug information and general logging generated by `bitcoind` or `bitcoin-qt`; can be specified by `-debuglogfile` option | ||||
`./` | `guisettings.ini.bak` | Backup of former [GUI settings](#gui-settings) after `-resetguisettings` option is used | `./` | `guisettings.ini.bak` | Backup of former [GUI settings](#gui-settings) after `-resetguisettings` option is used | ||||
`./` | `mempool.dat` | Dump of the mempool's transactions | `./` | `mempool.dat` | Dump of the mempool's transactions | ||||
`./` | `onion_v3_private_key` | Cached Tor onion service private key for `-listenonion` option | `./` | `onion_v3_private_key` | Cached Tor onion service private key for `-listenonion` option | ||||
`./` | `peers.dat` | Peer IP address database (custom format) | `./` | `peers.dat` | Peer IP address database (custom format) | ||||
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