kernel: Add progress method to notifications

This commit is part of the libbitcoinkernel project and seeks to remove
the ChainstateManager's and, more generally, the kernel library's
dependency on interface_ui with options methods in this and the
following few commits. By removing interface_ui from the kernel library,
its dependency on boost is reduced to just boost::multi_index.

src/bitcoin-chainstate.cpp

@@ -37,6 +37,7 @@
 #include <functional>
 #include <iosfwd>
 #include <memory>
+#include <string>
 
 int main(int argc, char* argv[])
 {
@@ -94,6 +95,10 @@ int main(int argc, char* argv[])
         {
             std::cout << "Header tip changed: " << height << ", " << timestamp << ", " << presync << std::endl;
         }
+        void progress(const bilingual_str& title, int progress_percent, bool resume_possible) override
+        {
+            std::cout << "Progress: " << title.original << ", " << progress_percent << ", " << resume_possible << std::endl;
+        }
     };
     auto notifications = std::make_unique<KernelNotifications>();
 

src/kernel/notifications_interface.h

@@ -6,9 +6,11 @@
 #define BITCOIN_KERNEL_NOTIFICATIONS_INTERFACE_H
 
 #include <cstdint>
+#include <string>
 
 class CBlockIndex;
 enum class SynchronizationState;
+struct bilingual_str;
 
 namespace kernel {
 
@@ -23,6 +25,7 @@ public:
 
     virtual void blockTip(SynchronizationState state, CBlockIndex& index) {}
     virtual void headerTip(SynchronizationState state, int64_t height, int64_t timestamp, bool presync) {}
+    virtual void progress(const bilingual_str& title, int progress_percent, bool resume_possible) {}
 };
 } // namespace kernel
 

src/node/chainstate.cpp

@@ -253,7 +253,7 @@ ChainstateLoadResult VerifyLoadedChainstate(ChainstateManager& chainman, const C
                                                          "Only rebuild the block database if you are sure that your computer's date and time are correct")};
             }
 
-            VerifyDBResult result = CVerifyDB().VerifyDB(
+            VerifyDBResult result = CVerifyDB(chainman.GetNotifications()).VerifyDB(
                 *chainstate, chainman.GetConsensus(), chainstate->CoinsDB(),
                 options.check_level,
                 options.check_blocks);

src/node/kernel_notifications.cpp

@@ -5,6 +5,7 @@
 #include <node/kernel_notifications.h>
 
 #include <node/interface_ui.h>
+#include <util/translation.h>
 
 namespace node {
 
@@ -18,4 +19,9 @@ void KernelNotifications::headerTip(SynchronizationState state, int64_t height,
     uiInterface.NotifyHeaderTip(state, height, timestamp, presync);
 }
 
+void KernelNotifications::progress(const bilingual_str& title, int progress_percent, bool resume_possible)
+{
+    uiInterface.ShowProgress(title.translated, progress_percent, resume_possible);
+}
+
 } // namespace node

src/node/kernel_notifications.h

@@ -8,9 +8,11 @@
 #include <kernel/notifications_interface.h>
 
 #include <cstdint>
+#include <string>
 
 class CBlockIndex;
 enum class SynchronizationState;
+struct bilingual_str;
 
 namespace node {
 class KernelNotifications : public kernel::Notifications
@@ -19,6 +21,8 @@ public:
     void blockTip(SynchronizationState state, CBlockIndex& index) override;
 
     void headerTip(SynchronizationState state, int64_t height, int64_t timestamp, bool presync) override;
+
+    void progress(const bilingual_str& title, int progress_percent, bool resume_possible) override;
 };
 } // namespace node
 

src/rpc/blockchain.cpp

@@ -1123,7 +1123,7 @@ static RPCHelpMan verifychain()
     LOCK(cs_main);
 
     Chainstate& active_chainstate = chainman.ActiveChainstate();
-    return CVerifyDB().VerifyDB(
+    return CVerifyDB(chainman.GetNotifications()).VerifyDB(
                active_chainstate, chainman.GetParams().GetConsensus(), active_chainstate.CoinsTip(), check_level, check_depth) == VerifyDBResult::SUCCESS;
 },
     };

src/validation.cpp

@@ -23,6 +23,7 @@
 #include <hash.h>
 #include <kernel/chainparams.h>
 #include <kernel/mempool_entry.h>
+#include <kernel/notifications_interface.h>
 #include <logging.h>
 #include <logging/timer.h>
 #include <node/blockstorage.h>
@@ -72,6 +73,7 @@ using kernel::CCoinsStats;
 using kernel::CoinStatsHashType;
 using kernel::ComputeUTXOStats;
 using kernel::LoadMempool;
+using kernel::Notifications;
 
 using fsbridge::FopenFn;
 using node::BlockManager;
@@ -4145,14 +4147,15 @@ bool Chainstate::LoadChainTip()
     return true;
 }
 
-CVerifyDB::CVerifyDB()
+CVerifyDB::CVerifyDB(Notifications& notifications)
+    : m_notifications{notifications}
 {
-    uiInterface.ShowProgress(_("Verifying blocks…").translated, 0, false);
+    m_notifications.progress(_("Verifying blocks…"), 0, false);
 }
 
 CVerifyDB::~CVerifyDB()
 {
-    uiInterface.ShowProgress("", 100, false);
+    m_notifications.progress(bilingual_str{}, 100, false);
 }
 
 VerifyDBResult CVerifyDB::VerifyDB(
@@ -4192,7 +4195,7 @@ VerifyDBResult CVerifyDB::VerifyDB(
             LogPrintf("Verification progress: %d%%\n", percentageDone);
             reportDone = percentageDone / 10;
         }
-        uiInterface.ShowProgress(_("Verifying blocks…").translated, percentageDone, false);
+        m_notifications.progress(_("Verifying blocks…"), percentageDone, false);
         if (pindex->nHeight <= chainstate.m_chain.Height() - nCheckDepth) {
             break;
         }
@@ -4268,7 +4271,7 @@ VerifyDBResult CVerifyDB::VerifyDB(
                 LogPrintf("Verification progress: %d%%\n", percentageDone);
                 reportDone = percentageDone / 10;
             }
-            uiInterface.ShowProgress(_("Verifying blocks…").translated, percentageDone, false);
+            m_notifications.progress(_("Verifying blocks…"), percentageDone, false);
             pindex = chainstate.m_chain.Next(pindex);
             CBlock block;
             if (!chainstate.m_blockman.ReadBlockFromDisk(block, *pindex)) {
@@ -4327,7 +4330,7 @@ bool Chainstate::ReplayBlocks()
     if (hashHeads.empty()) return true; // We're already in a consistent state.
     if (hashHeads.size() != 2) return error("ReplayBlocks(): unknown inconsistent state");
 
-    uiInterface.ShowProgress(_("Replaying blocks…").translated, 0, false);
+    m_chainman.GetNotifications().progress(_("Replaying blocks…"), 0, false);
     LogPrintf("Replaying blocks\n");
 
     const CBlockIndex* pindexOld = nullptr;  // Old tip during the interrupted flush.
@@ -4374,13 +4377,13 @@ bool Chainstate::ReplayBlocks()
         const CBlockIndex& pindex{*Assert(pindexNew->GetAncestor(nHeight))};
 
         LogPrintf("Rolling forward %s (%i)\n", pindex.GetBlockHash().ToString(), nHeight);
-        uiInterface.ShowProgress(_("Replaying blocks…").translated, (int) ((nHeight - nForkHeight) * 100.0 / (pindexNew->nHeight - nForkHeight)) , false);
+        m_chainman.GetNotifications().progress(_("Replaying blocks…"), (int)((nHeight - nForkHeight) * 100.0 / (pindexNew->nHeight - nForkHeight)), false);
         if (!RollforwardBlock(&pindex, cache)) return false;
     }
 
     cache.SetBestBlock(pindexNew->GetBlockHash());
     cache.Flush();
-    uiInterface.ShowProgress("", 100, false);
+    m_chainman.GetNotifications().progress(bilingual_str{}, 100, false);
     return true;
 }
 

src/validation.h

@@ -364,9 +364,13 @@ enum class VerifyDBResult {
 };
 
 /** RAII wrapper for VerifyDB: Verify consistency of the block and coin databases */
-class CVerifyDB {
+class CVerifyDB
+{
+private:
+    kernel::Notifications& m_notifications;
+
 public:
-    CVerifyDB();
+    explicit CVerifyDB(kernel::Notifications& notifications);
     ~CVerifyDB();
     [[nodiscard]] VerifyDBResult VerifyDB(
         Chainstate& chainstate,