docs: add coinbase rotation documentation to config examples

Document the new coinbase rotation configuration options in testnet4
config examples for both pool and JD-client.

Author: average-gary

miner-apps/jd-client/config-examples/testnet4/jdc-config-local-infra-example.toml

@@ -35,8 +35,18 @@ jdc_signature = "Sv2MinerSignature"
 #     https://github.com/bitcoin/bips/blob/master/bip-0380.mediawiki#appendix-b-index-of-script-expressions
 # Although the `musig` descriptor is not yet supported and the legacy `combo` descriptor never
 # will be. If you have an address, embed it in a descriptor like `addr(<address here>)`.
+#
+# For automatic address rotation (quantum-resistant payout hygiene), use a wildcard descriptor:
+#   coinbase_reward_script = "wpkh(tpub.../0/*)"
+# This derives a fresh address for each block found. Requires coinbase_index_file.
 coinbase_reward_script = "addr(tb1qpusf5256yxv50qt0pm0tue8k952fsu5lzsphft)"
 
+# Coinbase rotation settings (only used when coinbase_reward_script has a wildcard)
+# Path to persist the current derivation index (required for rotation)
+# coinbase_index_file = "/var/lib/jdc/coinbase_index.dat"
+# Starting index if no persistence file exists (default: 0)
+# coinbase_start_index = 0
+
 # Enable this option to set a predefined log file path.
 # When enabled, logs will always be written to this file.
 # The CLI option --log-file (or -f) will override this setting if provided.

pool-apps/pool/config-examples/testnet4/pool-config-local-sv2-tp-example.toml

@@ -8,8 +8,18 @@ listen_address = "0.0.0.0:43333"
 #     https://github.com/bitcoin/bips/blob/master/bip-0380.mediawiki#appendix-b-index-of-script-expressions
 # Although the `musig` descriptor is not yet supported and the legacy `combo` descriptor never
 # will be. If you have an address, embed it in a descriptor like `addr(<address here>)`.
+#
+# For automatic address rotation (quantum-resistant payout hygiene), use a wildcard descriptor:
+#   coinbase_reward_script = "wpkh(tpub.../0/*)"
+# This derives a fresh address for each block found. Requires coinbase_index_file.
 coinbase_reward_script = "addr(tb1qa0sm0hxzj0x25rh8gw5xlzwlsfvvyz8u96w3p8)"
 
+# Coinbase rotation settings (only used when coinbase_reward_script has a wildcard)
+# Path to persist the current derivation index (required for rotation)
+# coinbase_index_file = "/var/lib/pool/coinbase_index.dat"
+# Starting index if no persistence file exists (default: 0)
+# coinbase_start_index = 0
+
 # Server Id (number to guarantee unique search space allocation across different Pool servers)
 server_id = 1