Merge #20076: doc: Update and improve files.md

2dc79c4264d608ebe48c980f0ead54274ab3ee4f doc: Update and improve files.md (Hennadii Stepanov)

Pull request description:

  This PR adds to the `files.md`:
  - the `signet` subdirectory
  - the `ip_asn.map` file
  - some small improvements

ACKs for top commit:
  practicalswift:
    ACK 2dc79c4264d608ebe48c980f0ead54274ab3ee4f
  MarcoFalke:
    ACK 2dc79c4264d608ebe48c980f0ead54274ab3ee4f

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fanquake 2020-10-09 18:02:10 +08:00 committed by pasta
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@ -30,15 +30,16 @@ Linux | `$HOME/.dashcore/`
macOS | `$HOME/Library/Application Support/Dashcore/`
Windows | `%APPDATA%\Dashcore\` <sup>[\[1\]](#note1)</sup>
2. The non-default data directory path can be specified by `-datadir` option.
2. A custom data directory path can be specified with the `-datadir` option.
3. All content of the data directory, except for `dash.conf` file, is chain-specific. This means the actual data directory paths for non-mainnet cases differ:
Chain option | Data directory path
--------------------|--------------------
no option (mainnet) | *path_to_datadir*`/`
`-testnet` | *path_to_datadir*`/testnet3/`
`-regtest` | *path_to_datadir*`/regtest/`
Chain option | Data directory path
-------------------------------|------------------------------
`-chain=main` (default) | *path_to_datadir*`/`
`-chain=test` or `-testnet` | *path_to_datadir*`/testnet3/`
`-chain=devnet` or `-devnet` | *path_to_datadir*`/devnet/`
`-chain=regtest` or `-regtest` | *path_to_datadir*`/regtest/`
## Data directory layout
@ -48,11 +49,11 @@ Subdirectory | File(s) | Description
`blocks/index/` | LevelDB database | Block index; `-blocksdir` option does not affect this path
`blocks/` | `blkNNNNN.dat`<sup>[\[2\]](#note2)</sup> | Actual Dash 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)
`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 (UTXOs) and metadata about the transactions they are from)
`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/` | `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, wallets reside in the [data directory](#data-directory-location)
`./` | `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
`evodb/` | |special txes and quorums database
`llmq/` | |quorum signatures database
@ -65,6 +66,7 @@ Subdirectory | File(s) | Description
`./` | `netfulfilled.dat` | stores data about recently made network requests
`./` | `fee_estimates.dat` | Stores statistics used to estimate minimum transaction fees and priorities required for confirmation
`./` | `guisettings.ini.bak` | Backup of former [GUI settings](#gui-settings) after `-resetguisettings` option is used
`./` | `ip_asn.map` | IP addresses to Autonomous System Numbers (ASNs) mapping used for bucketing of the peers; path can be specified with the `-asmap` option
`./` | `mempool.dat` | Dump of the mempool's transactions
`./` | `onion_v3_private_key` | Cached Tor onion service private key for `-listenonion` option
`./` | `i2p_private_key` | Private key that corresponds to our I2P address. When `-i2psam=` is specified the contents of this file is used to identify ourselves for making outgoing connections to I2P peers and possibly accepting incoming ones. Automatically generated if it does not exist.
@ -124,7 +126,6 @@ Path | Description | Repository notes
## Notes
<a name="note1">1</a>. The `/` (slash, U+002F) is used as the platform-independent path component separator in this paper.
<a name="note1">1</a>. The `/` (slash, U+002F) is used as the platform-independent path component separator in this document.
<a name="note2">2</a>. `NNNNN` matches `[0-9]{5}` regex.