PoS improvements

src/Makefile.am

@@ -191,6 +191,7 @@ BITCOIN_CORE_H = \
   pow.h \
   primitives/block.h \
   primitives/transaction.h \
+  primitives/nonce.h \
   protocol.h \
   pubkey.h \
   random.h \
@@ -415,6 +416,7 @@ libbitcoin_common_a_SOURCES = \
   netbase.cpp \
   primitives/block.cpp \
   primitives/transaction.cpp \
+  primitives/nonce.cpp \
   protocol.cpp \
   pubkey.cpp \
   scheduler.cpp \
@@ -624,6 +626,7 @@ libzcashconsensus_la_SOURCES = \
   crypto/sha512.cpp \
   hash.cpp \
   primitives/transaction.cpp \
+  primitives/nonce.cpp \
   pubkey.cpp \
   script/zcashconsensus.cpp \
   script/interpreter.cpp \