util: add TransactionError includes and namespace declarations

Add TransactionError to node namespace and include it directly instead of
relying on indirect include through common/messages.h

This is a followup to a previous commit which moved the TransactionError enum.
These changes were done in a separate followup just to keep the previous commit
more minimal and easy to review.

src/node/interfaces.cpp

@@ -31,6 +31,7 @@
 #include <node/interface_ui.h>
 #include <node/mini_miner.h>
 #include <node/transaction.h>
+#include <node/types.h>
 #include <policy/feerate.h>
 #include <policy/fees.h>
 #include <policy/policy.h>

src/node/transaction.cpp

@@ -9,6 +9,7 @@
 #include <net_processing.h>
 #include <node/blockstorage.h>
 #include <node/context.h>
+#include <node/types.h>
 #include <txmempool.h>
 #include <validation.h>
 #include <validationinterface.h>

src/node/types.h

@@ -13,6 +13,7 @@
 #ifndef BITCOIN_NODE_TYPES_H
 #define BITCOIN_NODE_TYPES_H
 
+namespace node {
 enum class TransactionError {
     OK, //!< No error
     MISSING_INPUTS,
@@ -23,5 +24,6 @@ enum class TransactionError {
     MAX_BURN_EXCEEDED,
     INVALID_PACKAGE,
 };
+} // namespace node
 
 #endif // BITCOIN_NODE_TYPES_H