| banlist.dat |
stores the IPs/Subnets of banned nodes |
| bitcoin.conf |
contains configuration settings for bitcoind or bitcoin-qt |
| bitcoind.pid |
stores the process id of bitcoind while running |
| blocks/blk000??.dat |
block data (custom, 128 MiB per file); since 0.8.0 |
| blocks/rev000??.dat |
block undo data (custom); since 0.8.0 (format changed since pre-0.8) |
| blocks/index/* |
block index (LevelDB); since 0.8.0 |
| chainstate/* |
blockchain state database (LevelDB); since 0.8.0 |
| database/* |
BDB database environment; only used for wallet since 0.8.0; moved to wallets/ directory on new installs since 0.16.0 |
| db.log |
wallet database log file; moved to wallets/ directory on new installs since 0.16.0 |
| debug.log |
contains debug information and general logging generated by bitcoind or bitcoin-qt |
| fee_estimates.dat |
stores statistics used to estimate minimum transaction fees and priorities required for confirmation; since 0.10.0 |
| indexes/txindex/* |
optional transaction index database (LevelDB); since 0.17.0 |
| mempool.dat |
dump of the mempool's transactions; since 0.14.0 |
| mncache.dat |
stores data for masternode list |
| netfulfilled.dat |
stores data about recently made network requests |
| peers.dat |
peer IP address database (custom format); since 0.7.0 |
| special/* |
special txes and quorums database |
| wallet.dat |
personal wallet (BDB) with keys and transactions; moved to wallets/ directory on new installs since 0.16.0 |
| wallets/database/* |
BDB database environment; used for wallets since 0.16.0 |
| wallets/db.log |
wallet database log file; since 0.16.0 |
| wallets/wallet.dat |
personal wallet (BDB) with keys and transactions; since 0.16.0 |
| .cookie |
session RPC authentication cookie (written at start when cookie authentication is used, deleted on shutdown): since 0.12.0 |
| onion_private_key |
cached Tor hidden service private key for -listenonion: since 0.12.0 |
| guisettings.ini.bak |
backup of former GUI settings after -resetguisettings is used |