Remove use of IsInitialBlockDownload in wallet code

This commit does not change behavior.

src/interfaces/chain.cpp

@@ -248,6 +248,7 @@ public:
     CAmount maxTxFee() override { return ::maxTxFee; }
     bool getPruneMode() override { return ::fPruneMode; }
     bool p2pEnabled() override { return g_connman != nullptr; }
+    bool isInitialBlockDownload() override { return IsInitialBlockDownload(); }
     int64_t getAdjustedTime() override { return GetAdjustedTime(); }
     void initMessage(const std::string& message) override { ::uiInterface.InitMessage(message); }
     void initWarning(const std::string& message) override { InitWarning(message); }

src/interfaces/chain.h

@@ -178,6 +178,9 @@ public:
     //! Check if p2p enabled.
     virtual bool p2pEnabled() = 0;
 
+    // Check if in IBD.
+    virtual bool isInitialBlockDownload() = 0;
+
     //! Get adjusted time.
     virtual int64_t getAdjustedTime() = 0;
 

src/wallet/rpcwallet.cpp

@@ -3889,7 +3889,7 @@ UniValue sethdseed(const JSONRPCRequest& request)
             }.ToString());
     }
 
-    if (IsInitialBlockDownload()) {
+    if (pwallet->chain().isInitialBlockDownload()) {
         throw JSONRPCError(RPC_CLIENT_IN_INITIAL_DOWNLOAD, "Cannot set a new HD seed while still in Initial Block Download");
     }