dash/doc/files.md

• banlist.dat: stores the IPs/Subnets of banned nodes
• blocks/blk000??.dat: block data (custom, 128 MiB per file)
• blocks/rev000??.dat; block undo data (custom)
• blocks/index/*; block index (LevelDB)
• chainstate/*; block chain state database (LevelDB)
• dash.conf: contains configuration settings for dashd or dash-qt
• dashd.pid: stores the process id of dashd while running
• database/*: BDB database environment; only used for wallet; 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 dashd or dash-qt
• evodb/*: special txes and quorums database
• fee_estimates.dat: stores statistics used to estimate minimum transaction fees and priorities required for confirmation
• governance.dat: stores data for governance obgects
• indexes/txindex/*: optional transaction index database (LevelDB); since 0.17.0
• llmq/*: quorum signatures database
• mempool.dat: dump of the mempool's transactions
• mncache.dat: stores data for masternode list
• netfulfilled.dat: stores data about recently made network requests
• peers.dat: peer IP address database (custom format)
• 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)
• onion_v3_private_key: cached Tor hidden service private key for -listenonion
• guisettings.ini.bak: backup of former GUI settings after -resetguisettings is used