1 files changed, 766 insertions, 0 deletions

diff --git a/src/gui.cpp b/src/gui.cpp
new file mode 100644
index 0000000..6d81b9f
--- /dev/null
+++ b/src/gui.cpp
@@ -0,0 +1,766 @@
+// Bitflash GUI — ImGui + GLFW + OpenGL3
+// Same source on Linux and Windows. No platform ifdefs.
+
+#include "imgui/imgui.h"
+#include "imgui/imgui_impl_glfw.h"
+#include "imgui/imgui_impl_opengl3.h"
+#include <GLFW/glfw3.h>
+#include "headers_core.h"
+#include <string>
+#include <vector>
+#include <ctime>
+#include <cstdio>
+#include <sstream>
+#include <iomanip>
+#include "font_roboto.h"
+
+// ---------------------------------------------------------------------------
+// Node API
+// ---------------------------------------------------------------------------
+extern int64         nTransactionFee;
+extern int           fGenerateBitcoins;
+extern int           nBestHeight;
+extern int           nMineMode;
+extern std::string   strParticipantPool;
+extern CAddress      addrLocalHost;
+
+void   MainFrameRepaint();
+string DateTimeStr(int64 nTime);
+bool   SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew);
+int64  GetBalance();
+string PubKeyToAddress(const std::vector<unsigned char>& vchPubKey);
+bool   AddressToHash160(const std::string& str, uint160& hash160Ret);
+void   ThreadBitcoinMiner(void*);
+void   ThreadRPCServer(void*);
+
+// ---------------------------------------------------------------------------
+// State
+// ---------------------------------------------------------------------------
+static std::string g_myAddress;
+static int64       g_balance     = 0;
+static int64       g_lastWalletRefresh = 0;
+static bool        g_showSend    = false;
+static bool        g_showOptions = false;
+static bool        g_showAbout   = false;
+static bool        g_needRefresh = true;
+
+static char        g_sendAddr[128]        = {};
+static char        g_sendAmount[32]       = {};
+static std::string g_sendStatus;
+static char        g_participantPool[256] = {};
+static char        g_poolName[128]        = {};
+static char        g_poolFee[32]          = {};
+static char        g_poolDash[256]        = {};
+static int         g_mineRadio            = 0;
+
+struct TxRow { std::string date, desc; int64 amount; int depth; };
+static std::vector<TxRow> g_txRows;
+
+// ---------------------------------------------------------------------------
+// Helpers
+// ---------------------------------------------------------------------------
+static std::string FmtMoney(int64 n)
+{
+    bool neg = n < 0; if (neg) n = -n;
+    char buf[64];
+    snprintf(buf, sizeof(buf), "%s%lld.%08lld",
+             neg?"-":"", (long long)(n/COIN), (long long)(n%COIN));
+    char* dot = strchr(buf, '.');
+    if (dot) { char* e = buf+strlen(buf)-1; while(e>dot+2&&*e=='0') *e--='\0'; }
+    return buf;
+}
+
+static std::string FmtAge(int64 createdAt)
+{
+    int64 age = GetTime() - createdAt;
+    if (age < 0)
+        age = 0;
+    if (age < 60)
+        return strprintf("%llds", (long long)age);
+    if (age < 3600)
+        return strprintf("%lldm", (long long)(age / 60));
+    return strprintf("%lldh", (long long)(age / 3600));
+}
+
+static ImVec4 ParticipantStatusColor(const std::string& status)
+{
+    if (status.find("failed") != std::string::npos ||
+        status.find("rejected") != std::string::npos ||
+        status.find("stopped") != std::string::npos)
+        return ImVec4(1.0f, 0.38f, 0.38f, 1.0f);
+    if (status.find("hashing") != std::string::npos ||
+        status.find("accepted") != std::string::npos ||
+        status.find("connected") != std::string::npos)
+        return ImVec4(0.35f, 1.0f, 0.45f, 1.0f);
+    if (status.find("asking") != std::string::npos ||
+        status.find("authoriz") != std::string::npos ||
+        status.find("subscrib") != std::string::npos)
+        return ImVec4(1.0f, 0.75f, 0.25f, 1.0f);
+    return ImVec4(0.55f, 0.80f, 1.0f, 1.0f);
+}
+
+static std::string PoolLabel(const BtfPoolAnnouncement& ann)
+{
+    std::ostringstream o;
+    o << ann.poolName << " - " << std::fixed << std::setprecision(2) << ann.feePercent << "%";
+    if (ann.connectedMiners > 0)
+        o << " - " << ann.connectedMiners << " miners";
+    return o.str();
+}
+
+static void RefreshWallet()
+{
+    std::vector<unsigned char> vchPubKey;
+    if (CWalletDB("r").ReadDefaultKey(vchPubKey))
+        g_myAddress = PubKeyToAddress(vchPubKey);
+    g_balance = GetBalance();
+
+    g_txRows.clear();
+    TRY_CRITICAL_BLOCK(cs_mapWallet)
+    {
+        std::vector<std::pair<int64,uint256>> vs;
+        for (auto& kv : mapWallet) vs.push_back({kv.second.GetTxTime(), kv.first});
+        std::sort(vs.rbegin(), vs.rend());
+        for (auto& sv : vs) {
+            auto mi = mapWallet.find(sv.second);
+            if (mi == mapWallet.end()) continue;
+            CWalletTx& wtx = mi->second;
+            int64 net = wtx.GetCredit() - wtx.GetDebit();
+            int depth = wtx.GetDepthInMainChain();
+            std::string desc;
+            if (wtx.IsCoinBase())        desc = depth<1 ? "Generated (unconfirmed)" : "Generated";
+            else if (wtx.GetDebit() > 0) desc = "Sent";
+            else                          desc = "Received";
+            g_txRows.push_back({DateTimeStr(wtx.GetTxTime()), desc, net, depth});
+        }
+    }
+    g_lastWalletRefresh = GetTime();
+}
+
+void MainFrameRepaint() { g_needRefresh = true; }
+
+string DateTimeStr(int64 nTime)
+{
+    time_t t = (time_t)nTime;
+    struct tm* p = localtime(&t);
+    if (!p) return "";
+    char buf[32]; strftime(buf, sizeof(buf), "%m/%d/%y %H:%M", p);
+    return buf;
+}
+
+// ---------------------------------------------------------------------------
+// Main window
+// ---------------------------------------------------------------------------
+static void DrawMainWindow()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    ImGui::SetNextWindowPos(ImVec2(0,0));
+    ImGui::SetNextWindowSize(io.DisplaySize);
+    ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(12,12));
+    ImGui::Begin("##main", nullptr,
+        ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoResize |
+        ImGuiWindowFlags_NoMove | ImGuiWindowFlags_MenuBar |
+        ImGuiWindowFlags_NoFocusOnAppearing);
+    ImGui::SetWindowFontScale(0.92f);
+    ImGui::PopStyleVar();
+
+    // ---- Menu bar ----
+    if (ImGui::BeginMenuBar()) {
+        if (ImGui::BeginMenu("File")) {
+            if (ImGui::MenuItem("Exit")) glfwSetWindowShouldClose(glfwGetCurrentContext(), true);
+            ImGui::EndMenu();
+        }
+        if (ImGui::MenuItem("Options"))  g_showOptions = true;
+        if (ImGui::MenuItem("About"))    g_showAbout   = true;
+        ImGui::EndMenuBar();
+    }
+
+    // ---- Address bar ----
+    ImGui::Spacing();
+    ImGui::TextDisabled("Address:");
+    ImGui::SameLine();
+    ImGui::SetNextItemWidth(-80);
+    ImGui::PushStyleColor(ImGuiCol_FrameBg, ImVec4(0.14f,0.14f,0.14f,1));
+    ImGui::InputText("##addr", (char*)g_myAddress.c_str(), g_myAddress.size()+1,
+                     ImGuiInputTextFlags_ReadOnly);
+    ImGui::PopStyleColor();
+    ImGui::SameLine();
+    if (ImGui::Button("Copy##a")) ImGui::SetClipboardText(g_myAddress.c_str());
+
+    // ---- Balance on its own line ----
+    ImGui::TextDisabled("Balance:");
+    ImGui::SameLine();
+    ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(0.35f,1.0f,0.35f,1.0f));
+    ImGui::Text("%s BTF", FmtMoney(g_balance).c_str());
+    ImGui::PopStyleColor();
+
+    // ---- Toolbar ----
+    ImGui::Spacing();
+    ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(0.15f,0.40f,0.15f,1));
+    ImGui::PushStyleColor(ImGuiCol_ButtonHovered, ImVec4(0.20f,0.55f,0.20f,1));
+    if (ImGui::Button("  Send Coins  ")) g_showSend = true;
+    ImGui::PopStyleColor(2);
+
+    // Mining status indicator
+    ImGui::SameLine(0, 20);
+    if (fGenerateBitcoins) {
+        ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(1.0f,0.6f,0.0f,1.0f));
+        const char* modeLabel = nMineMode==MINE_OPERATOR ? "Mining (operator)" :
+                                nMineMode==MINE_PARTICIPANT ? "Mining (pool)" : "Mining";
+        ImGui::Text("⬤ %s", modeLabel);
+        ImGui::PopStyleColor();
+        if (nMineMode == MINE_PARTICIPANT) {
+            std::string mineStatus = GetParticipantMiningStatus();
+            if (!mineStatus.empty()) {
+                ImGui::SameLine(0, 12);
+                ImGui::PushStyleColor(ImGuiCol_Text, ParticipantStatusColor(mineStatus));
+                ImGui::Text("[%s]", mineStatus.c_str());
+                ImGui::PopStyleColor();
+            }
+        }
+    } else {
+        ImGui::TextDisabled("○ Not mining");
+    }
+
+    ImGui::Spacing();
+    ImGui::Separator();
+    ImGui::Spacing();
+
+    // ---- Live telemetry strip ----
+    {
+        const char* modeName = nMineMode==MINE_OPERATOR ? "Operator" :
+                               nMineMode==MINE_PARTICIPANT ? "Participant" : "Solo";
+        int64 age = g_lastWalletRefresh > 0 ? (GetTime() - g_lastWalletRefresh) : -1;
+        if (age < 0) age = 0;
+
+        ImGui::Text("Mode: %s", modeName);
+        ImGui::SameLine(0, 16);
+        ImGui::Text("Wallet refresh: %llds ago", (long long)age);
+
+        if (nMineMode == MINE_PARTICIPANT) {
+            uint64 sent = 0, accepted = 0;
+            double hashRate = 0.0;
+            std::string mineStatus = GetParticipantMiningStatus();
+            GetParticipantMiningStats(sent, accepted, hashRate);
+            if (sent > 0 || accepted > 0 || hashRate > 0.0) {
+                double acceptPct = sent ? (100.0 * (double)accepted / (double)sent) : 0.0;
+                ImGui::TextDisabled("Your mining: sent %llu, accepted %llu (%.1f%%), %.2f H/s",
+                                    (unsigned long long)sent,
+                                    (unsigned long long)accepted,
+                                    acceptPct,
+                                    hashRate);
+            } else if (!mineStatus.empty()) {
+                ImGui::TextDisabled("Your mining: %s", mineStatus.c_str());
+            } else {
+                ImGui::TextDisabled("Your mining: asking pool for work");
+            }
+        } else if (nMineMode == MINE_OPERATOR) {
+            int miners = 0, blocksFound = 0;
+            uint64 roundShares = 0;
+            GetPoolOperatorStats(miners, blocksFound, roundShares);
+            if (miners > 0 || blocksFound > 0 || roundShares > 0)
+                ImGui::TextDisabled("Pool runtime: %d authorized miners, %llu round shares, %d blocks found", miners, (unsigned long long)roundShares, blocksFound);
+            else
+                ImGui::TextDisabled("Pool runtime: waiting for miners");
+        } else {
+            ImGui::TextDisabled("Solo runtime: local wallet mining telemetry");
+        }
+        ImGui::Spacing();
+        ImGui::Separator();
+        ImGui::Spacing();
+    }
+
+    // ---- Transaction list ----
+    float listHeight = io.DisplaySize.y * 0.26f;
+    if (listHeight < 190.0f) listHeight = 190.0f;
+    if (listHeight > 260.0f) listHeight = 260.0f;
+    if (ImGui::BeginTable("txlist", 4,
+        ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg |
+        ImGuiTableFlags_ScrollY | ImGuiTableFlags_SizingStretchProp,
+        ImVec2(0, listHeight)))
+    {
+        ImGui::TableSetupScrollFreeze(0, 1);
+        ImGui::TableSetupColumn("Status",      ImGuiTableColumnFlags_WidthFixed, 110);
+        ImGui::TableSetupColumn("Date",        ImGuiTableColumnFlags_WidthFixed, 130);
+        ImGui::TableSetupColumn("Description", ImGuiTableColumnFlags_WidthStretch);
+        ImGui::TableSetupColumn("Amount",      ImGuiTableColumnFlags_WidthFixed, 140);
+        ImGui::TableHeadersRow();
+
+        for (auto& row : g_txRows) {
+            ImGui::TableNextRow();
+            ImGui::TableSetColumnIndex(0);
+            if (row.depth < 1)
+                ImGui::TextColored(ImVec4(1,0.6f,0,1), "Unconfirmed");
+            else
+                ImGui::Text("%d blocks deep", row.depth);
+            ImGui::TableSetColumnIndex(1);
+            ImGui::TextDisabled("%s", row.date.c_str());
+            ImGui::TableSetColumnIndex(2);
+            ImGui::TextUnformatted(row.desc.c_str());
+            ImGui::TableSetColumnIndex(3);
+            if (row.amount >= 0)
+                ImGui::TextColored(ImVec4(0.35f,1,0.35f,1), "+%s BTF", FmtMoney(row.amount).c_str());
+            else
+                ImGui::TextColored(ImVec4(1,0.4f,0.4f,1),   "%s BTF",  FmtMoney(row.amount).c_str());
+        }
+        ImGui::EndTable();
+    }
+
+    std::vector<BtfPoolAnnouncement> pools;
+    BtfGetPoolAnnouncements(pools);
+
+    if (nMineMode == MINE_PARTICIPANT) {
+        ImGui::Spacing();
+        ImGui::SeparatorText("Participant Mining");
+        ImGui::Text("Selected pool:");
+        if (strParticipantPool.empty())
+            ImGui::TextDisabled("No pool selected yet");
+        else
+            ImGui::TextWrapped("%s", strParticipantPool.c_str());
+
+        const BtfPoolAnnouncement* selected = NULL;
+        for (size_t i = 0; i < pools.size(); i++)
+            if (pools[i].btfAddress == strParticipantPool) { selected = &pools[i]; break; }
+
+        if (selected) {
+            ImGui::Text("Pool name: %s", selected->poolName.c_str());
+            ImGui::Text("Fee: %.2f%%", selected->feePercent);
+            ImGui::Text("Live stats: %d miners, %d blocks", selected->connectedMiners, selected->blocksFound);
+            if (!selected->dashboardUrl.empty())
+                ImGui::TextWrapped("Dashboard: %s", selected->dashboardUrl.c_str());
+        } else if (!strParticipantPool.empty()) {
+            ImGui::TextDisabled("No fresh announcement found for this pool yet");
+        }
+
+        if (!pools.empty()) {
+            ImGui::Spacing();
+            ImGui::SeparatorText("Live Pools");
+            if (ImGui::BeginTable("livepools", 5,
+                ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg | ImGuiTableFlags_SizingStretchProp))
+            {
+                ImGui::TableSetupColumn("Pool", ImGuiTableColumnFlags_WidthStretch);
+                ImGui::TableSetupColumn("Fee", ImGuiTableColumnFlags_WidthFixed, 70);
+                ImGui::TableSetupColumn("Stats", ImGuiTableColumnFlags_WidthFixed, 160);
+                ImGui::TableSetupColumn("Dashboard", ImGuiTableColumnFlags_WidthStretch);
+                ImGui::TableSetupColumn("Use", ImGuiTableColumnFlags_WidthFixed, 60);
+                ImGui::TableHeadersRow();
+                for (size_t i = 0; i < pools.size(); i++) {
+                    const BtfPoolAnnouncement& ann = pools[i];
+                    ImGui::TableNextRow();
+                    ImGui::TableSetColumnIndex(0);
+                    ImGui::TextUnformatted(ann.poolName.c_str());
+                    ImGui::TextDisabled("%s", ann.btfAddress.c_str());
+                    ImGui::TableSetColumnIndex(1);
+                    ImGui::Text("%.2f%%", ann.feePercent);
+                    ImGui::TableSetColumnIndex(2);
+                    ImGui::Text("%d miners, %d blocks, %s old", ann.connectedMiners, ann.blocksFound, FmtAge(ann.createdAt).c_str());
+                    ImGui::TableSetColumnIndex(3);
+                    if (!ann.dashboardUrl.empty())
+                        ImGui::TextWrapped("%s", ann.dashboardUrl.c_str());
+                    else
+                        ImGui::TextDisabled("-");
+                    ImGui::TableSetColumnIndex(4);
+                    if (ImGui::SmallButton((std::string("Use##") + ann.btfAddress).c_str())) {
+                        strncpy(g_participantPool, ann.btfAddress.c_str(), sizeof(g_participantPool)-1);
+                        strParticipantPool = ann.btfAddress;
+                        CWalletDB().WriteSetting("strParticipantPool", strParticipantPool);
+                        g_needRefresh = true;
+                    }
+                }
+                ImGui::EndTable();
+            }
+        }
+    }
+
+    if (nMineMode == MINE_OPERATOR) {
+        ImGui::Spacing();
+        ImGui::SeparatorText("Operator Overview");
+        ImGui::Text("Pool .btf address:");
+        std::string opAddr = BtfLocalAddress();
+        if (opAddr.empty())
+            ImGui::TextDisabled("Identity not ready yet");
+        else
+            ImGui::TextWrapped("%s", opAddr.c_str());
+
+        std::vector<PendingPayoutView> owed;
+        GetPendingPayouts(owed);
+        ImGui::Spacing();
+        ImGui::SeparatorText("Pending Pool Payouts (you owe miners)");
+        if (owed.empty()) {
+            ImGui::TextDisabled("No pending pool payouts");
+        } else if (ImGui::BeginTable("owedpayouts", 4,
+                   ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg | ImGuiTableFlags_SizingStretchProp))
+        {
+            ImGui::TableSetupColumn("Matures At", ImGuiTableColumnFlags_WidthFixed, 100);
+            ImGui::TableSetupColumn("Blocks Left", ImGuiTableColumnFlags_WidthFixed, 90);
+            ImGui::TableSetupColumn("Recipients", ImGuiTableColumnFlags_WidthFixed, 90);
+            ImGui::TableSetupColumn("Total", ImGuiTableColumnFlags_WidthStretch);
+            ImGui::TableHeadersRow();
+            for (const PendingPayoutView& row : owed) {
+                int remaining = std::max(0, row.matureAtHeight - nBestHeight);
+                ImGui::TableNextRow();
+                ImGui::TableSetColumnIndex(0);
+                ImGui::Text("%d", row.matureAtHeight);
+                ImGui::TableSetColumnIndex(1);
+                ImGui::Text("%d", remaining);
+                ImGui::TableSetColumnIndex(2);
+                ImGui::Text("%d", row.recipients);
+                ImGui::TableSetColumnIndex(3);
+                ImGui::Text("%s BTF", FmtMoney(row.totalAmount).c_str());
+            }
+            ImGui::EndTable();
+        }
+
+        std::vector<PoolWorkerStatView> workers;
+        GetPoolWorkerStats(workers);
+        ImGui::Spacing();
+        ImGui::SeparatorText("Current Round Workers");
+        if (workers.empty()) {
+            ImGui::TextDisabled("No active workers in this round");
+        } else if (ImGui::BeginTable("workers", 4,
+                   ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg | ImGuiTableFlags_SizingStretchProp))
+        {
+            ImGui::TableSetupColumn("Payout Addr", ImGuiTableColumnFlags_WidthStretch);
+            ImGui::TableSetupColumn("Worker", ImGuiTableColumnFlags_WidthStretch);
+            ImGui::TableSetupColumn("Round Shares", ImGuiTableColumnFlags_WidthFixed, 90);
+            ImGui::TableSetupColumn("Last Seen", ImGuiTableColumnFlags_WidthFixed, 100);
+            ImGui::TableHeadersRow();
+            for (const PoolWorkerStatView& row : workers) {
+                ImGui::TableNextRow();
+                ImGui::TableSetColumnIndex(0);
+                ImGui::TextUnformatted(row.address.empty() ? "unknown" : row.address.c_str());
+                ImGui::TableSetColumnIndex(1);
+                ImGui::TextDisabled("%s", row.worker.empty() ? "worker" : row.worker.c_str());
+                ImGui::TableSetColumnIndex(2);
+                ImGui::Text("%llu", (unsigned long long)row.roundShares);
+                ImGui::TableSetColumnIndex(3);
+                ImGui::TextDisabled("%s", FmtAge(row.lastSeen).c_str());
+            }
+            ImGui::EndTable();
+        }
+    }
+
+    // ---- Status bar ----
+    {
+        ImGui::Spacing();
+        ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(4,2));
+
+        int peers = (int)vNodes.size();
+        if (nMineMode == MINE_PARTICIPANT) {
+            uint64 sent = 0, accepted = 0;
+            double hashRate = 0.0;
+            std::string mineStatus = GetParticipantMiningStatus();
+            GetParticipantMiningStats(sent, accepted, hashRate);
+            if (sent > 0 || accepted > 0 || hashRate > 0.0)
+                ImGui::TextDisabled("Peers %d  height %d  shares sent %llu  accepted %llu  hash rate %.2f H/s",
+                                    peers,
+                                    nBestHeight,
+                                    (unsigned long long)sent,
+                                    (unsigned long long)accepted,
+                                    hashRate);
+            else if (!mineStatus.empty())
+                ImGui::TextDisabled("Peers %d  height %d  %s", peers, nBestHeight, mineStatus.c_str());
+            else
+                ImGui::TextDisabled("Peers %d  height %d  asking pool for work", peers, nBestHeight);
+        } else if (nMineMode == MINE_OPERATOR) {
+            int miners = 0, blocksFound = 0;
+            uint64 roundShares = 0;
+            GetPoolOperatorStats(miners, blocksFound, roundShares);
+            if (miners > 0 || blocksFound > 0 || roundShares > 0)
+                ImGui::TextDisabled("Peers %d  height %d  authorized miners %d  round shares %llu  blocks found %d",
+                                    peers, nBestHeight, miners, (unsigned long long)roundShares, blocksFound);
+            else
+                ImGui::TextDisabled("Peers %d  height %d  waiting for miners", peers, nBestHeight);
+        } else {
+            ImGui::TextDisabled("Peers %d  height %d", peers, nBestHeight);
+        }
+        ImGui::PopStyleVar();
+    }
+
+    ImGui::SetWindowFontScale(1.0f);
+    ImGui::End();
+}
+
+// ---------------------------------------------------------------------------
+// Send dialog
+// ---------------------------------------------------------------------------
+static void DrawSendDialog()
+{
+    if (!g_showSend) return;
+    ImGui::SetNextWindowSize(ImVec2(500, 180), ImGuiCond_Always);
+    ImGui::SetNextWindowPos(ImGui::GetMainViewport()->GetCenter(), ImGuiCond_Always, ImVec2(.5f,.5f));
+    if (ImGui::Begin("Send Coins", &g_showSend,
+        ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoCollapse))
+    {
+        ImGui::Text("Recipient address:");
+        ImGui::SetNextItemWidth(-1);
+        ImGui::InputText("##sa", g_sendAddr, sizeof(g_sendAddr));
+
+        ImGui::Text("Amount (BTF):");
+        ImGui::SetNextItemWidth(180);
+        ImGui::InputText("##sm", g_sendAmount, sizeof(g_sendAmount));
+
+        if (!g_sendStatus.empty()) {
+            ImGui::Spacing();
+            ImGui::TextColored(ImVec4(1,.4f,.4f,1), "%s", g_sendStatus.c_str());
+        }
+
+        ImGui::Spacing(); ImGui::Separator(); ImGui::Spacing();
+        if (ImGui::Button("Send", ImVec2(90,0))) {
+            uint160 h; int64 nv = 0;
+            if (!AddressToHash160(g_sendAddr, h))          g_sendStatus = "Invalid address.";
+            else if (!ParseMoney(g_sendAmount,nv)||nv<=0)   g_sendStatus = "Invalid amount.";
+            else {
+                CScript s; s << OP_DUP << OP_HASH160 << h << OP_EQUALVERIFY << OP_CHECKSIG;
+                CWalletTx wtx;
+                if (SendMoney(s, nv, wtx)) {
+                    g_showSend=false; g_sendStatus="";
+                    memset(g_sendAddr,0,sizeof(g_sendAddr));
+                    memset(g_sendAmount,0,sizeof(g_sendAmount));
+                    g_needRefresh = true;
+                } else g_sendStatus = "Transaction failed.";
+            }
+        }
+        ImGui::SameLine();
+        if (ImGui::Button("Cancel", ImVec2(90,0))) { g_showSend=false; g_sendStatus=""; }
+    }
+    ImGui::End();
+}
+
+// ---------------------------------------------------------------------------
+// Options dialog
+// ---------------------------------------------------------------------------
+static void DrawOptionsDialog()
+{
+    if (!g_showOptions) return;
+
+    // Always sync from current globals when dialog opens
+    static bool wasOpen = false;
+    if (!wasOpen) {
+        g_mineRadio = nMineMode;
+        strncpy(g_participantPool, strParticipantPool.c_str(), sizeof(g_participantPool)-1);
+        strncpy(g_poolName, strPoolName.c_str(), sizeof(g_poolName)-1);
+        snprintf(g_poolFee, sizeof(g_poolFee), "%.2f", dPoolFeePercent);
+        strncpy(g_poolDash, strPoolDashboardUrl.c_str(), sizeof(g_poolDash)-1);
+    }
+    wasOpen = true;
+    ImGui::SetNextWindowSize(ImVec2(500, 310), ImGuiCond_Always);
+    ImGui::SetNextWindowPos(ImGui::GetMainViewport()->GetCenter(), ImGuiCond_Always, ImVec2(.5f,.5f));
+    if (ImGui::Begin("Options", &g_showOptions,
+        ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoCollapse))
+    {
+        // Transaction fee
+        ImGui::SeparatorText("Transaction Fee");
+        static char feeStr[32] = {};
+        if (feeStr[0]=='\0') snprintf(feeStr,sizeof(feeStr),"%s",FmtMoney(nTransactionFee).c_str());
+        ImGui::SetNextItemWidth(180);
+        ImGui::InputText("BTF per transaction##fee", feeStr, sizeof(feeStr));
+
+        // Mining
+        ImGui::SeparatorText("Mining Mode");
+        ImGui::RadioButton("Solo  — rewards go to your wallet",       &g_mineRadio, MINE_SOLO);
+        ImGui::RadioButton("Operator  — run a pool for other miners", &g_mineRadio, MINE_OPERATOR);
+        ImGui::RadioButton("Participant  — mine to someone's pool",   &g_mineRadio, MINE_PARTICIPANT);
+
+        if (g_mineRadio == MINE_OPERATOR) {
+            ImGui::Spacing();
+            ImGui::SeparatorText("Pool Announcement");
+            ImGui::Text("Pool name:");
+            ImGui::SetNextItemWidth(-1);
+            ImGui::InputText("##poolname", g_poolName, sizeof(g_poolName));
+            ImGui::Text("Fee %%:");
+            ImGui::SetNextItemWidth(120);
+            ImGui::InputText("##poolfee", g_poolFee, sizeof(g_poolFee));
+            ImGui::Text("Dashboard URL:");
+            ImGui::SetNextItemWidth(-1);
+            ImGui::InputText("##pooldash", g_poolDash, sizeof(g_poolDash));
+        }
+
+        if (g_mineRadio == MINE_PARTICIPANT) {
+            ImGui::Spacing();
+            ImGui::SeparatorText("Pool Selection");
+            ImGui::TextDisabled("Pick from live discovered pools. Manual entry is disabled here.");
+
+            std::vector<BtfPoolAnnouncement> pools;
+            BtfGetPoolAnnouncements(pools);
+            if (!pools.empty()) {
+                std::string current = "Select a live pool";
+                for (size_t i = 0; i < pools.size(); i++) {
+                    if (pools[i].btfAddress == g_participantPool) {
+                        current = PoolLabel(pools[i]);
+                        break;
+                    }
+                }
+                if (ImGui::BeginCombo("Discovered pools", current.c_str())) {
+                    for (size_t i = 0; i < pools.size(); i++) {
+                        const BtfPoolAnnouncement& ann = pools[i];
+                        std::string label = PoolLabel(ann);
+                        bool selected = ann.btfAddress == g_participantPool;
+                        if (ImGui::Selectable(label.c_str(), selected)) {
+                            strncpy(g_participantPool, ann.btfAddress.c_str(), sizeof(g_participantPool)-1);
+                        }
+                    }
+                    ImGui::EndCombo();
+                }
+            } else {
+                ImGui::TextDisabled("No live pools discovered yet");
+            }
+        }
+
+        ImGui::Spacing();
+        const char* genLabel = fGenerateBitcoins ? "Stop Mining" : "Start Mining";
+        if (ImGui::Button(genLabel, ImVec2(130,0))) {
+            fGenerateBitcoins = fGenerateBitcoins ? 0 : 1;
+            if (fGenerateBitcoins) _beginthread(ThreadBitcoinMiner, 0, NULL);
+            CWalletDB().WriteSetting("fGenerateBitcoins", fGenerateBitcoins);
+        }
+
+        ImGui::Spacing(); ImGui::Separator(); ImGui::Spacing();
+        if (ImGui::Button("OK", ImVec2(90,0))) {
+            int64 fee=0;
+            if (ParseMoney(feeStr,fee)) { nTransactionFee=fee; CWalletDB().WriteSetting("nTransactionFee",nTransactionFee); }
+
+            bool changed = (g_mineRadio != nMineMode);
+            nMineMode = g_mineRadio;
+            strParticipantPool = g_participantPool;
+            strPoolName = g_poolName[0] ? g_poolName : "Bitflash Pool";
+            strPoolDashboardUrl = g_poolDash;
+            dPoolFeePercent = atof(g_poolFee);
+            CWalletDB().WriteSetting("nMineMode", nMineMode);
+            CWalletDB().WriteSetting("strParticipantPool", strParticipantPool);
+            CWalletDB().WriteSetting("strPoolName", strPoolName);
+            CWalletDB().WriteSetting("strPoolDashboardUrl", strPoolDashboardUrl);
+            CWalletDB().WriteSetting("dPoolFeePercent", dPoolFeePercent);
+
+            if (nMineMode == MINE_OPERATOR) {
+                if (!gPoolServerRunning) {
+                    gPoolServerRunning = true;
+                    _beginthread(ThreadRPCServer, 0, NULL);
+                } else if (!gPoolRunning) {
+                    gPoolRunning = true;
+                }
+            } else {
+                gPoolRunning = false;
+            }
+            g_showOptions = false;
+        }
+        ImGui::SameLine();
+        if (ImGui::Button("Cancel", ImVec2(90,0))) g_showOptions = false;
+    }
+    if (!g_showOptions) wasOpen = false;
+    ImGui::End();
+}
+
+// ---------------------------------------------------------------------------
+// About dialog
+// ---------------------------------------------------------------------------
+static void DrawAboutDialog()
+{
+    if (!g_showAbout) return;
+    ImGui::SetNextWindowSize(ImVec2(380, 170), ImGuiCond_Always);
+    ImGui::SetNextWindowPos(ImGui::GetMainViewport()->GetCenter(), ImGuiCond_Always, ImVec2(.5f,.5f));
+    if (ImGui::Begin("About Bitflash", &g_showAbout,
+        ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoCollapse))
+    {
+        ImGui::TextColored(ImVec4(1,.6f,0,1), "Bitflash  BTF  v1.1.0");
+        ImGui::Spacing();
+        ImGui::TextWrapped("CPU-only cryptocurrency. RandomX proof of work. Anonymous .btf addressing over Nostr. No premine.");
+        ImGui::Spacing();
+        ImGui::TextDisabled("Based on Bitcoin 0.1.0 (Satoshi Nakamoto, 2009)");
+        ImGui::Spacing();
+        if (ImGui::Button("OK", ImVec2(90,0))) g_showAbout = false;
+    }
+    ImGui::End();
+}
+
+// ---------------------------------------------------------------------------
+// Entry point
+// ---------------------------------------------------------------------------
+int RunGUI(int argc, char* argv[])
+{
+    if (!glfwInit()) return 1;
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+#ifdef __APPLE__
+    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+#endif
+
+    GLFWwindow* window = glfwCreateWindow(960, 640, "Bitflash", nullptr, nullptr);
+    if (!window) { glfwTerminate(); return 1; }
+    glfwMakeContextCurrent(window);
+    glfwSwapInterval(1);
+
+    IMGUI_CHECKVERSION();
+    ImGui::CreateContext();
+    ImGuiIO& io = ImGui::GetIO();
+    io.IniFilename = nullptr;
+
+    // Load Roboto at 16px — clean, readable on all platforms
+    io.Fonts->AddFontFromMemoryCompressedTTF(
+        RobotoMedium_compressed_data, RobotoMedium_compressed_size, 16.0f);
+
+    ImGui::StyleColorsDark();
+    ImGuiStyle& s = ImGui::GetStyle();
+    s.WindowRounding = s.FrameRounding = s.PopupRounding = 4.0f;
+    s.ItemSpacing    = ImVec2(10, 7);
+    s.FramePadding   = ImVec2(8, 5);
+    s.WindowPadding  = ImVec2(12, 12);
+    // Orange accent
+    s.Colors[ImGuiCol_TitleBgActive]  = ImVec4(.80f,.45f,.00f,1);
+    s.Colors[ImGuiCol_CheckMark]      = ImVec4(1.0f,.60f,.00f,1);
+    s.Colors[ImGuiCol_SliderGrab]     = ImVec4(.80f,.45f,.00f,1);
+    s.Colors[ImGuiCol_Button]         = ImVec4(.25f,.25f,.25f,1);
+    s.Colors[ImGuiCol_ButtonHovered]  = ImVec4(.80f,.45f,.00f,1);
+    s.Colors[ImGuiCol_ButtonActive]   = ImVec4(.60f,.30f,.00f,1);
+    s.Colors[ImGuiCol_Header]         = ImVec4(.80f,.45f,.00f,.40f);
+    s.Colors[ImGuiCol_HeaderHovered]  = ImVec4(.80f,.45f,.20f,.80f);
+    s.Colors[ImGuiCol_Tab]            = ImVec4(.20f,.20f,.20f,1);
+    s.Colors[ImGuiCol_TabHovered]     = ImVec4(.80f,.45f,.00f,1);
+    s.Colors[ImGuiCol_TabActive]      = ImVec4(.80f,.45f,.00f,1);
+    s.Colors[ImGuiCol_SeparatorHovered]=ImVec4(.80f,.45f,.00f,1);
+    s.Colors[ImGuiCol_FrameBg]        = ImVec4(.14f,.14f,.14f,1);
+    s.Colors[ImGuiCol_FrameBgHovered] = ImVec4(.20f,.20f,.20f,1);
+    s.Colors[ImGuiCol_TableHeaderBg]  = ImVec4(.18f,.18f,.18f,1);
+    s.Colors[ImGuiCol_TableRowBg]     = ImVec4(.11f,.11f,.11f,1);
+    s.Colors[ImGuiCol_TableRowBgAlt]  = ImVec4(.14f,.14f,.14f,1);
+
+    ImGui_ImplGlfw_InitForOpenGL(window, true);
+    ImGui_ImplOpenGL3_Init("#version 330");
+
+    g_mineRadio = nMineMode;
+    strncpy(g_participantPool, strParticipantPool.c_str(), sizeof(g_participantPool)-1);
+
+    int frame = 0;
+    while (!glfwWindowShouldClose(window) && !fShutdown)
+    {
+        glfwPollEvents();
+        if (g_needRefresh || (frame % 120 == 0)) { RefreshWallet(); g_needRefresh = false; }
+        frame++;
+
+        ImGui_ImplOpenGL3_NewFrame();
+        ImGui_ImplGlfw_NewFrame();
+        ImGui::NewFrame();
+
+        DrawMainWindow();
+        DrawSendDialog();
+        DrawOptionsDialog();
+        DrawAboutDialog();
+
+        ImGui::Render();
+        int w, h; glfwGetFramebufferSize(window, &w, &h);
+        glViewport(0, 0, w, h);
+        glClearColor(.08f,.08f,.08f,1);
+        glClear(GL_COLOR_BUFFER_BIT);
+        ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+        glfwSwapBuffers(window);
+    }
+
+    fShutdown = true;
+    ImGui_ImplOpenGL3_Shutdown();
+    ImGui_ImplGlfw_Shutdown();
+    ImGui::DestroyContext();
+    glfwDestroyWindow(window);
+    glfwTerminate();
+    return 0;
+}