testnet: Introduce Testnet4

doc/REST-interface.md

@@ -4,7 +4,7 @@ Unauthenticated REST Interface
 The REST API can be enabled with the `-rest` option.
 
 The interface runs on the same port as the JSON-RPC interface, by default port 8332 for mainnet, port 18332 for testnet,
-port 38332 for signet, and port 18443 for regtest.
+port 48332 for testnet4, port 38332 for signet, and port 18443 for regtest.
 
 REST Interface consistency guarantees
 -------------------------------------

doc/files.md

@@ -34,12 +34,13 @@ Windows  | `%LOCALAPPDATA%\Bitcoin\` <sup>[\[1\]](#note1)</sup>
 
 3. All content of the data directory, except for `bitcoin.conf` file, is chain-specific. This means the actual data directory paths for non-mainnet cases differ:
 
-Chain option                   | Data directory path
--------------------------------|------------------------------
-`-chain=main` (default)        | *path_to_datadir*`/`
-`-chain=test` or `-testnet`    | *path_to_datadir*`/testnet3/`
-`-chain=signet` or `-signet`   | *path_to_datadir*`/signet/`
-`-chain=regtest` or `-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=testnet4` or `-testnet4` | *path_to_datadir*`/testnet4/`
+`-chain=signet` or `-signet`     | *path_to_datadir*`/signet/`
+`-chain=regtest` or `-regtest`   | *path_to_datadir*`/regtest/`
 
 ## Data directory layout
 

doc/release-process.md

@@ -311,13 +311,15 @@ Both variables are used as a guideline for how much space the user needs on thei
 Note that all values should be taken from a **fully synced** node and have an overhead of 5-10% added on top of its base value.
 
 To calculate `m_assumed_blockchain_size`, take the size in GiB of these directories:
-- For `mainnet` -> the data directory, excluding the `/testnet3`, `/signet`, and `/regtest` directories and any overly large files, e.g. a huge `debug.log`
+- For `mainnet` -> the data directory, excluding the `/testnet3`, `/testnet4`, `/signet`, and `/regtest` directories and any overly large files, e.g. a huge `debug.log`
 - For `testnet` -> `/testnet3`
+- For `testnet4` -> `/testnet4`
 - For `signet` -> `/signet`
 
 To calculate `m_assumed_chain_state_size`, take the size in GiB of these directories:
 - For `mainnet` -> `/chainstate`
 - For `testnet` -> `/testnet3/chainstate`
+- For `testnet4` -> `/testnet4/chainstate`
 - For `signet` -> `/signet/chainstate`
 
 Notes: