Pass chain and client variables where needed

This commit does not change behavior. All it does is pass new function
parameters.

It is easiest to review this change with:

    git log -p -n1 -U0 --word-diff-regex=.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/rpc/util.h b/src/rpc/util.h
index 0a3a156e45..e21b5ba22a 100644
--- a/src/rpc/util.h
+++ b/src/rpc/util.h
@@ -17,6 +17,12 @@
 class CKeyStore;
 class CPubKey;
 class CScript;
+struct InitInterfaces;
+
+//! Pointers to interfaces that need to be accessible from RPC methods. Due to
+//! limitations of the RPC framework, there's currently no direct way to pass in
+//! state to RPC method implementations.
+extern InitInterfaces* g_rpc_interfaces;
 
 CPubKey HexToPubKey(const std::string& hex_in);
 CPubKey AddrToPubKey(CKeyStore* const keystore, const std::string& addr_in);