multiprocess: Add IPC wrapper for Mining interface

src/ipc/CMakeLists.txt

@@ -9,10 +9,14 @@ add_library(bitcoin_ipc STATIC EXCLUDE_FROM_ALL
 )
 
 target_capnp_sources(bitcoin_ipc ${PROJECT_SOURCE_DIR}
-  capnp/echo.capnp capnp/init.capnp
+  capnp/common.capnp
+  capnp/echo.capnp
+  capnp/init.capnp
+  capnp/mining.capnp
 )
 
 target_link_libraries(bitcoin_ipc
   PRIVATE
     core_interface
+    univalue
 )

src/ipc/capnp/common-types.h

@@ -6,6 +6,7 @@
 #define BITCOIN_IPC_CAPNP_COMMON_TYPES_H
 
 #include <clientversion.h>
+#include <interfaces/types.h>
 #include <primitives/transaction.h>
 #include <serialize.h>
 #include <streams.h>
@@ -93,6 +94,26 @@ requires ipc::capnp::Deserializable<LocalType>
     return read_dest.construct(::deserialize, wrapper);
 }
 
+//! Overload CustomBuildField and CustomReadField to serialize std::chrono
+//! parameters and return values as numbers.
+template <class Rep, class Period, typename Value, typename Output>
+void CustomBuildField(TypeList<std::chrono::duration<Rep, Period>>, Priority<1>, InvokeContext& invoke_context, Value&& value,
+                      Output&& output)
+{
+    static_assert(std::numeric_limits<decltype(output.get())>::lowest() <= std::numeric_limits<Rep>::lowest(),
+                  "capnp type does not have enough range to hold lowest std::chrono::duration value");
+    static_assert(std::numeric_limits<decltype(output.get())>::max() >= std::numeric_limits<Rep>::max(),
+                  "capnp type does not have enough range to hold highest std::chrono::duration value");
+    output.set(value.count());
+}
+
+template <class Rep, class Period, typename Input, typename ReadDest>
+decltype(auto) CustomReadField(TypeList<std::chrono::duration<Rep, Period>>, Priority<1>, InvokeContext& invoke_context,
+                               Input&& input, ReadDest&& read_dest)
+{
+    return read_dest.construct(input.get());
+}
+
 //! Overload CustomBuildField and CustomReadField to serialize UniValue
 //! parameters and return values as JSON strings.
 template <typename Value, typename Output>

src/ipc/capnp/common.capnp

@@ -0,0 +1,16 @@
+# Copyright (c) 2024 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+@0xcd2c6232cb484a28;
+
+using Cxx = import "/capnp/c++.capnp";
+$Cxx.namespace("ipc::capnp::messages");
+
+using Proxy = import "/mp/proxy.capnp";
+$Proxy.includeTypes("ipc/capnp/common-types.h");
+
+struct BlockRef $Proxy.wrap("interfaces::BlockRef") {
+    hash @0 :Data;
+    height @1 :Int32;
+}

src/ipc/capnp/init-types.h

@@ -6,5 +6,6 @@
 #define BITCOIN_IPC_CAPNP_INIT_TYPES_H
 
 #include <ipc/capnp/echo.capnp.proxy-types.h>
+#include <ipc/capnp/mining.capnp.proxy-types.h>
 
 #endif // BITCOIN_IPC_CAPNP_INIT_TYPES_H

src/ipc/capnp/init.capnp

@@ -10,11 +10,14 @@ $Cxx.namespace("ipc::capnp::messages");
 using Proxy = import "/mp/proxy.capnp";
 $Proxy.include("interfaces/echo.h");
 $Proxy.include("interfaces/init.h");
+$Proxy.include("interfaces/mining.h");
 $Proxy.includeTypes("ipc/capnp/init-types.h");
 
 using Echo = import "echo.capnp";
+using Mining = import "mining.capnp";
 
 interface Init $Proxy.wrap("interfaces::Init") {
     construct @0 (threadMap: Proxy.ThreadMap) -> (threadMap :Proxy.ThreadMap);
     makeEcho @1 (context :Proxy.Context) -> (result :Echo.Echo);
+    makeMining @2 (context :Proxy.Context) -> (result :Mining.Mining);
 }

src/ipc/capnp/mining-types.h

@@ -0,0 +1,16 @@
+// Copyright (c) 2024 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_IPC_CAPNP_MINING_TYPES_H
+#define BITCOIN_IPC_CAPNP_MINING_TYPES_H
+
+#include <interfaces/mining.h>
+#include <ipc/capnp/common.capnp.proxy-types.h>
+#include <ipc/capnp/common-types.h>
+#include <ipc/capnp/mining.capnp.proxy.h>
+#include <node/miner.h>
+#include <node/types.h>
+#include <validation.h>
+
+#endif // BITCOIN_IPC_CAPNP_MINING_TYPES_H

src/ipc/capnp/mining.capnp

@@ -0,0 +1,44 @@
+# Copyright (c) 2024 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+@0xc77d03df6a41b505;
+
+using Cxx = import "/capnp/c++.capnp";
+$Cxx.namespace("ipc::capnp::messages");
+
+using Common = import "common.capnp";
+using Proxy = import "/mp/proxy.capnp";
+$Proxy.include("interfaces/mining.h");
+$Proxy.includeTypes("ipc/capnp/mining-types.h");
+
+interface Mining $Proxy.wrap("interfaces::Mining") {
+    isTestChain @0 (context :Proxy.Context) -> (result: Bool);
+    isInitialBlockDownload @1 (context :Proxy.Context) -> (result: Bool);
+    getTip @2 (context :Proxy.Context) -> (result: Common.BlockRef, hasResult: Bool);
+    waitTipChanged @3 (context :Proxy.Context, currentTip: Data, timeout: Float64) -> (result: Common.BlockRef);
+    createNewBlock @4 (scriptPubKey: Data, options: BlockCreateOptions) -> (result: BlockTemplate);
+    processNewBlock @5 (context :Proxy.Context, block: Data) -> (newBlock: Bool, result: Bool);
+    getTransactionsUpdated @6 (context :Proxy.Context) -> (result: UInt32);
+    testBlockValidity @7 (context :Proxy.Context, block: Data, checkMerkleRoot: Bool) -> (state: BlockValidationState, result: Bool);
+}
+
+interface BlockTemplate $Proxy.wrap("interfaces::BlockTemplate") {
+    getBlockHeader @0 (context: Proxy.Context) -> (result: Data);
+    getBlock @1 (context: Proxy.Context) -> (result: Data);
+    getTxFees @2 (context: Proxy.Context) -> (result: List(Int64));
+    getTxSigops @3 (context: Proxy.Context) -> (result: List(Int64));
+    getCoinbaseTx @4 (context: Proxy.Context) -> (result: Data);
+    getCoinbaseCommitment @5 (context: Proxy.Context) -> (result: Data);
+    getWitnessCommitmentIndex @6 (context: Proxy.Context) -> (result: Int32);
+}
+
+struct BlockCreateOptions $Proxy.wrap("node::BlockCreateOptions") {
+    useMempool @0 :Bool $Proxy.name("use_mempool");
+    coinbaseMaxAdditionalWeight @1 :UInt64 $Proxy.name("coinbase_max_additional_weight");
+    coinbaseOutputMaxAdditionalSigops @2 :UInt64 $Proxy.name("coinbase_output_max_additional_sigops");
+}
+
+# TODO add fields to this struct
+struct BlockValidationState $Proxy.wrap("BlockValidationState") {
+}