Be able to trigger a rollback on minor version change

counterparty-core/counterpartycore/lib/check.py

@@ -1060,6 +1060,24 @@ def check_need_reparse(version_minor, message):
                 )
 
 
+def check_need_rollback(version_minor, message):
+    if config.FORCE:
+        return
+    need_rollback_from = (
+        config.NEED_ROLLBACK_IF_MINOR_IS_LESS_THAN_TESTNET
+        if config.TESTNET
+        else config.NEED_ROLLBACK_IF_MINOR_IS_LESS_THAN
+    )
+    if need_rollback_from is not None:
+        for min_version_minor, min_version_block_index in need_rollback_from:
+            if version_minor < min_version_minor:
+                raise DatabaseVersionError(
+                    message=message,
+                    required_action="rollback",
+                    from_block_index=min_version_block_index,
+                )
+
+
 def database_version(db):
     if config.FORCE:
         return
@@ -1078,7 +1096,8 @@ def database_version(db):
         message = (
             f"Client minor version number mismatch: {version_minor} ≠ {config.VERSION_MINOR}. "
         )
-        message += "Checking if a reparse is needed..."
+        message += "Checking if a rollback or a reparse is needed..."
+        check_need_rollback(version_minor, message)
         check_need_reparse(version_minor, message)
         raise DatabaseVersionError(message=message, required_action=None)
     else:

counterparty-core/counterpartycore/lib/config.py

@@ -20,14 +20,16 @@
 # Fo example:
 # NEED_REPARSE_IF_MINOR_IS_LESS_THAN = (1, 800000)
 # means that we need to reparse from block 800000 if database minor version is less than 1
-NEED_REPARSE_IF_MINOR_IS_LESS_THAN = [(3, 0), (5, 865999), (6, 867000), (7, 869900), (8, 871780)]
+NEED_REPARSE_IF_MINOR_IS_LESS_THAN = [(3, 0), (5, 865999), (6, 867000), (7, 869900)]
 NEED_REPARSE_IF_MINOR_IS_LESS_THAN_TESTNET = [
     (3, 0),
     (5, 2925799),
     (6, 2925799),
     (7, 2925799),
-    (8, 3522632),
 ]
+NEED_ROLLBACK_IF_MINOR_IS_LESS_THAN = [(8, 871780)]
+NEED_ROLLBACK_IF_MINOR_IS_LESS_THAN_TESTNET = [(8, 3522632)]
+
 # Counterparty protocol
 TXTYPE_FORMAT = ">I"
 SHORT_TXTYPE_FORMAT = "B"

release-notes/release-notes-v10.8.0.md

@@ -44,6 +44,8 @@
 - Catch up with RPC when ZMQ is late
 - Restart RSFetcher when it returns None too many times
 - Exclude transaction with SIGHASH
+- Add several checkpoints
+- Be able to trigger a rollback on minor version change
 
 ## API