Add rewind logic to deal with post-fork software updates

Includes logic for dealing with pruning by Suhas Daftuar.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/main.h b/src/main.h
index 317470e3c8..84a6044bc9 100644
--- a/src/main.h
+++ b/src/main.h
@@ -459,6 +459,9 @@ bool TestBlockValidity(CValidationState& state, const CChainParams& chainparams,
 /** Check whether witness commitments are required for block. */
 bool IsWitnessEnabled(const CBlockIndex* pindexPrev, const Consensus::Params& params);
 
+/** When there are blocks in the active chain with missing data, rewind the chainstate and remove them from the block index */
+bool RewindBlockIndex(const CChainParams& params);
+
 /** Update uncommitted block structures (currently: only the witness nonce). This is safe for submitted blocks. */
 void UpdateUncommittedBlockStructures(CBlock& block, const CBlockIndex* pindexPrev, const Consensus::Params& consensusParams);