[index] TxIndex method to wait until caught up.

In order to preserve getrawtransaction RPC behavior, there needs to be
a way for a thread to ensure the transaction index is in sync with the
current state of the blockchain.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/index/txindex.h b/src/index/txindex.h
index 633aee46ce..e1f1b17676 100644
--- a/src/index/txindex.h
+++ b/src/index/txindex.h
@@ -63,6 +63,12 @@ public:
     /// Destructor interrupts sync thread if running and blocks until it exits.
     ~TxIndex();
 
+    /// Blocks the current thread until the transaction index is caught up to
+    /// the current state of the block chain. This only blocks if the index has gotten in sync once
+    /// and only needs to process blocks in the ValidationInterface queue. If the index is catching
+    /// up from far behind, this method does not block and immediately returns false.
+    bool BlockUntilSyncedToCurrentChain();
+
     /// Look up the on-disk location of a transaction by hash.
     bool FindTx(const uint256& txid, CDiskTxPos& pos) const;