[wallet] Move getBlockHeight from Chain::Lock interface to simple Chain

Add HaveChain to assert chain access for wallet-tool in LoadToWallet.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index 662f5d4bb3..fa2821dfea 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -778,6 +778,9 @@ public:
     /** Interface to assert chain access and if successful lock it */
     std::unique_ptr<interfaces::Chain::Lock> LockChain() { return m_chain ? m_chain->lock() : nullptr; }
 
+    /** Interface to assert chain access */
+    bool HaveChain() const { return m_chain ? true : false; }
+
     std::map<uint256, CWalletTx> mapWallet GUARDED_BY(cs_wallet);
 
     typedef std::multimap<int64_t, CWalletTx*> TxItems;