diff --git a/src/ipc/capnp/mining.capnp b/src/ipc/capnp/mining.capnp
index 25df1186331..7e5cced6f31 100644
--- a/src/ipc/capnp/mining.capnp
+++ b/src/ipc/capnp/mining.capnp
@@ -12,6 +12,11 @@ using Proxy = import "/mp/proxy.capnp";
 $Proxy.include("interfaces/mining.h");
 $Proxy.includeTypes("ipc/capnp/mining-types.h");
 
+const maxMoney :Int64 = 2100000000000000;
+const maxDouble :Float64 = 1.7976931348623157e308;
+const defaultBlockReservedWeight :UInt32 = 8000;
+const defaultCoinbaseOutputMaxAdditionalSigops :UInt32 = 400;
+
 interface Mining $Proxy.wrap("interfaces::Mining") {
     isTestChain @0 (context :Proxy.Context) -> (result: Bool);
     isInitialBlockDownload @1 (context :Proxy.Context) -> (result: Bool);
diff --git a/src/ipc/test/ipc_test.cpp b/src/ipc/test/ipc_test.cpp
index bec288813ad..31607299ae7 100644
--- a/src/ipc/test/ipc_test.cpp
+++ b/src/ipc/test/ipc_test.cpp
@@ -8,6 +8,7 @@
 #include <ipc/protocol.h>
 #include <logging.h>
 #include <mp/proxy-types.h>
+#include <ipc/capnp/mining.capnp.h>
 #include <ipc/test/ipc_test.capnp.h>
 #include <ipc/test/ipc_test.capnp.proxy.h>
 #include <ipc/test/ipc_test.h>
@@ -23,6 +24,11 @@
 
 #include <boost/test/unit_test.hpp>
 
+static_assert(ipc::capnp::messages::MAX_MONEY == MAX_MONEY);
+static_assert(ipc::capnp::messages::MAX_DOUBLE == std::numeric_limits<double>::max());
+static_assert(ipc::capnp::messages::DEFAULT_BLOCK_RESERVED_WEIGHT == DEFAULT_BLOCK_RESERVED_WEIGHT);
+static_assert(ipc::capnp::messages::DEFAULT_COINBASE_OUTPUT_MAX_ADDITIONAL_SIGOPS == DEFAULT_COINBASE_OUTPUT_MAX_ADDITIONAL_SIGOPS);
+
 //! Remote init class.
 class TestInit : public interfaces::Init
 {
diff --git a/src/node/types.h b/src/node/types.h
index e3ee05dd0d9..01e74528e06 100644
--- a/src/node/types.h
+++ b/src/node/types.h
@@ -55,7 +55,7 @@ struct BlockCreateOptions {
      * The maximum additional sigops which the pool will add in coinbase
      * transaction outputs.
      */
-    size_t coinbase_output_max_additional_sigops{400};
+    size_t coinbase_output_max_additional_sigops{DEFAULT_COINBASE_OUTPUT_MAX_ADDITIONAL_SIGOPS};
     /**
      * Script to put in the coinbase transaction. The default is an
      * anyone-can-spend dummy.
diff --git a/src/policy/policy.h b/src/policy/policy.h
index 35189d71335..0bc7b327708 100644
--- a/src/policy/policy.h
+++ b/src/policy/policy.h
@@ -24,6 +24,8 @@ class CScript;
 static constexpr unsigned int DEFAULT_BLOCK_MAX_WEIGHT{MAX_BLOCK_WEIGHT};
 /** Default for -blockreservedweight **/
 static constexpr unsigned int DEFAULT_BLOCK_RESERVED_WEIGHT{8000};
+/** Default sigops cost to reserve for coinbase transaction outputs when creating block templates. */
+static constexpr unsigned int DEFAULT_COINBASE_OUTPUT_MAX_ADDITIONAL_SIGOPS{400};
 /** This accounts for the block header, var_int encoding of the transaction count and a minimally viable
  * coinbase transaction. It adds an additional safety margin, because even with a thorough understanding
  * of block serialization, it's easy to make a costly mistake when trying to squeeze every last byte.