Merge #12967: [0.16] Backports

8fca086 List support for BIP173 in bips.md (Pieter Wuille)
9645aa6 Remove blockmaxsize option from init.cpp (fanquake)
7847b92 Default to defining endian-conversion DECLs in compat w/o config (Matt Corallo)
1720eb3 qt:Show the entire Window when double clicking on taskbar (Chun Kuan Lee)
e055bc0 depends: Fix Qt build with XCode 9.3 (fanquake)
0684cf9 Avoid launching as admin when NSIS installer ends. (JeremyRand)
e802c22 [config] Remove blockmaxsize option (John Newbery)
f118a7a Fix illegal default `addProxy` and `addrSeparateProxyTor` settings. (251)
f60e84d Limit the number of IPs we use from each DNS seeder (e0)

Pull request description:

  Backports:
  - #12626 Limit the number of IPs addrman learns from each DNS seeder
  - #12650 gui: Fix issue: "default port not shown correctly in settings dialog"
  - #12756 [config] Remove blockmaxsize option
  - #12985 Windows: Avoid launching as admin when NSIS installer ends.
  - #12946 depends: Fix Qt build with XCode 9.3
  - #12998 Default to defining endian-conversion DECLs in compat w/o config
  - #12999 qt: Show the Window when double clicking the taskbar icon
  - #13064 List support for BIP173 in bips.md

  to the 0.16 branch.

Tree-SHA512: 3e6b47c54b2cd2bdd81fbc6176cb31e46423f6e05988984d3a09b3535e3cee101ffb071cf753a4beff3c9f0521eb5de4b7c0424a3e97da801d56b4015847ac0f

14 files changed, 132 insertions, 28 deletions

diff --git a/depends/packages/qt.mk b/depends/packages/qt.mk
index 8491927552..745c9e1157 100644
--- a/depends/packages/qt.mk
+++ b/depends/packages/qt.mk
@@ -8,7 +8,8 @@ $(package)_dependencies=openssl zlib
 $(package)_linux_dependencies=freetype fontconfig libxcb libX11 xproto libXext
 $(package)_build_subdir=qtbase
 $(package)_qt_libs=corelib network widgets gui plugins testlib
-$(package)_patches=mac-qmake.conf mingw-uuidof.patch pidlist_absolute.patch fix-xcb-include-order.patch fix_qt_pkgconfig.patch fix-cocoahelpers-macos.patch
+$(package)_patches=mac-qmake.conf mingw-uuidof.patch pidlist_absolute.patch fix-xcb-include-order.patch
+$(package)_patches+=fix_qt_pkgconfig.patch fix-cocoahelpers-macos.patch qfixed-coretext.patch
 
 $(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
 $(package)_qttranslations_sha256_hash=3a15aebd523c6d89fb97b2d3df866c94149653a26d27a00aac9b6d3020bc5a1d
@@ -141,6 +142,7 @@ define $(package)_preprocess_cmds
   patch -p1 < $($(package)_patch_dir)/fix-xcb-include-order.patch && \
   patch -p1 < $($(package)_patch_dir)/fix_qt_pkgconfig.patch && \
   patch -p1 < $($(package)_patch_dir)/fix-cocoahelpers-macos.patch && \
+  patch -p1 < $($(package)_patch_dir)/qfixed-coretext.patch && \
   echo "!host_build: QMAKE_CFLAGS     += $($(package)_cflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   echo "!host_build: QMAKE_CXXFLAGS   += $($(package)_cxxflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   echo "!host_build: QMAKE_LFLAGS     += $($(package)_ldflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
diff --git a/depends/patches/qt/qfixed-coretext.patch b/depends/patches/qt/qfixed-coretext.patch
new file mode 100644
index 0000000000..aa56f1e1de
--- /dev/null
+++ b/depends/patches/qt/qfixed-coretext.patch
@@ -0,0 +1,34 @@
+From dbdd5f0ffbce52c8b789ed09f1aa3f1da6c02e23 Mon Sep 17 00:00:00 2001
+From: Gabriel de Dietrich <gabriel.dedietrich@qt.io>
+Date: Fri, 30 Mar 2018 11:58:16 -0700
+Subject: [PATCH] QCoreTextFontEngine: Fix build with Xcode 9.3
+
+Apple LLVM version 9.1.0 (clang-902.0.39.1)
+
+Error message:
+
+.../qfontengine_coretext.mm:827:20: error: qualified reference to
+      'QFixed' is a constructor name rather than a type in this context
+    return QFixed::QFixed(int(CTFontGetUnitsPerEm(ctfont)));
+
+Change-Id: Iebe26b3b087a16b10664208fc8851cbddb47f043
+Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
+---
+ src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git old/qtbase/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm new/qtbase/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
+index 25ff69d877d..98b753eff96 100644
+--- old/qtbase/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
++++ new/qtbase/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
+@@ -824,7 +824,7 @@ void QCoreTextFontEngine::getUnscaledGlyph(glyph_t glyph, QPainterPath *path, gl
+ 
+ QFixed QCoreTextFontEngine::emSquareSize() const
+ {
+-    return QFixed::QFixed(int(CTFontGetUnitsPerEm(ctfont)));
++    return QFixed(int(CTFontGetUnitsPerEm(ctfont)));
+ }
+ 
+ QFontEngine *QCoreTextFontEngine::cloneWithSize(qreal pixelSize) const
+-- 
+2.16.3
\ No newline at end of file
diff --git a/doc/bips.md b/doc/bips.md
index e587275f0f..5b8eabd6df 100644
--- a/doc/bips.md
+++ b/doc/bips.md
@@ -1,4 +1,4 @@
-BIPs that are implemented by Bitcoin Core (up-to-date up to **v0.13.0**):
+BIPs that are implemented by Bitcoin Core (up-to-date up to **v0.16.0**):
 
 * [`BIP 9`](https://github.com/bitcoin/bips/blob/master/bip-0009.mediawiki): The changes allowing multiple soft-forks to be deployed in parallel have been implemented since **v0.12.1**  ([PR #7575](https://github.com/bitcoin/bitcoin/pull/7575))
 * [`BIP 11`](https://github.com/bitcoin/bips/blob/master/bip-0011.mediawiki): Multisig outputs are standard since **v0.6.0** ([PR #669](https://github.com/bitcoin/bitcoin/pull/669)).
@@ -34,4 +34,5 @@ BIPs that are implemented by Bitcoin Core (up-to-date up to **v0.13.0**):
 * [`BIP 147`](https://github.com/bitcoin/bips/blob/master/bip-0147.mediawiki): NULLDUMMY softfork as of **v0.13.1** ([PR 8636](https://github.com/bitcoin/bitcoin/pull/8636) and [PR 8937](https://github.com/bitcoin/bitcoin/pull/8937)).
 * [`BIP 152`](https://github.com/bitcoin/bips/blob/master/bip-0152.mediawiki): Compact block transfer and related optimizations are used as of **v0.13.0** ([PR 8068](https://github.com/bitcoin/bitcoin/pull/8068)).
 * [`BIP 159`](https://github.com/bitcoin/bips/blob/master/bip-0159.mediawiki): NODE_NETWORK_LIMITED service bit [signaling only] is supported as of **v0.16.0** ([PR 11740](https://github.com/bitcoin/bitcoin/pull/11740)).
+* [`BIP 173`](https://github.com/bitcoin/bips/blob/master/bip-0173.mediawiki): Bech32 addresses for native Segregated Witness outputs are supported as of **v0.16.0** ([PR 11167](https://github.com/bitcoin/bitcoin/pull/11167)).
 * [`BIP 176`](https://github.com/bitcoin/bips/blob/master/bip-0176.mediawiki): Bits Denomination [QT only] is supported as of **v0.16.0** ([PR 12035](https://github.com/bitcoin/bitcoin/pull/12035)).
diff --git a/doc/release-notes.md b/doc/release-notes.md
index f7590d2eb5..f902494f24 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -59,6 +59,14 @@ Example item for a notable change.
 
 (to be filled in at release time)
 
+Miner block size removed
+------------------------
+
+The `-blockmaxsize` option for miners to limit their blocks' sizes was
+deprecated in V0.15.1, and has now been removed. Miners should use the
+`-blockmaxweight` option if they want to limit the weight of their blocks'
+weights.
+
 Credits
 =======
 
diff --git a/share/setup.nsi.in b/share/setup.nsi.in
index dd42085a27..9fee9b42e0 100644
--- a/share/setup.nsi.in
+++ b/share/setup.nsi.in
@@ -20,7 +20,8 @@ SetCompressor /SOLID lzma
 !define MUI_STARTMENUPAGE_REGISTRY_KEY ${REGKEY}
 !define MUI_STARTMENUPAGE_REGISTRY_VALUENAME StartMenuGroup
 !define MUI_STARTMENUPAGE_DEFAULTFOLDER "@PACKAGE_NAME@"
-!define MUI_FINISHPAGE_RUN $INSTDIR\@BITCOIN_GUI_NAME@@EXEEXT@
+!define MUI_FINISHPAGE_RUN "$WINDIR\explorer.exe"
+!define MUI_FINISHPAGE_RUN_PARAMETERS $INSTDIR\@BITCOIN_GUI_NAME@@EXEEXT@
 !define MUI_UNICON "${NSISDIR}\Contrib\Graphics\Icons\modern-uninstall.ico"
 !define MUI_UNWELCOMEFINISHPAGE_BITMAP "@abs_top_srcdir@/share/pixmaps/nsis-wizard.bmp"
 !define MUI_UNFINISHPAGE_NOAUTOCLOSE
diff --git a/src/compat/endian.h b/src/compat/endian.h
index e5c7e50223..4f244c3930 100644
--- a/src/compat/endian.h
+++ b/src/compat/endian.h
@@ -19,6 +19,51 @@
 #include <sys/endian.h>
 #endif
 
+#ifndef HAVE_CONFIG_H
+// While not technically a supported configuration, defaulting to defining these
+// DECLs when we were compiled without autotools makes it easier for other build
+// systems to build things like libbitcoinconsensus for strange targets.
+#ifdef htobe16
+#define HAVE_DECL_HTOBE16 1
+#endif
+#ifdef htole16
+#define HAVE_DECL_HTOLE16 1
+#endif
+#ifdef be16toh
+#define HAVE_DECL_BE16TOH 1
+#endif
+#ifdef le16toh
+#define HAVE_DECL_LE16TOH 1
+#endif
+
+#ifdef htobe32
+#define HAVE_DECL_HTOBE32 1
+#endif
+#ifdef htole32
+#define HAVE_DECL_HTOLE32 1
+#endif
+#ifdef be32toh
+#define HAVE_DECL_BE32TOH 1
+#endif
+#ifdef le32toh
+#define HAVE_DECL_LE32TOH 1
+#endif
+
+#ifdef htobe64
+#define HAVE_DECL_HTOBE64 1
+#endif
+#ifdef htole64
+#define HAVE_DECL_HTOLE64 1
+#endif
+#ifdef be64toh
+#define HAVE_DECL_BE64TOH 1
+#endif
+#ifdef le64toh
+#define HAVE_DECL_LE64TOH 1
+#endif
+
+#endif // HAVE_CONFIG_H
+
 #if defined(WORDS_BIGENDIAN)
 
 #if HAVE_DECL_HTOBE16 == 0
diff --git a/src/init.cpp b/src/init.cpp
index 2a37ae780f..162c32c38c 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -490,7 +490,6 @@ std::string HelpMessage(HelpMessageMode mode)
 
     strUsage += HelpMessageGroup(_("Block creation options:"));
     strUsage += HelpMessageOpt("-blockmaxweight=<n>", strprintf(_("Set maximum BIP141 block weight (default: %d)"), DEFAULT_BLOCK_MAX_WEIGHT));
-    strUsage += HelpMessageOpt("-blockmaxsize=<n>", _("Set maximum BIP141 block weight to this * 4. Deprecated, use blockmaxweight"));
     strUsage += HelpMessageOpt("-blockmintxfee=<amt>", strprintf(_("Set lowest fee rate (in %s/kB) for transactions to be included in block creation. (default: %s)"), CURRENCY_UNIT, FormatMoney(DEFAULT_BLOCK_MIN_TX_FEE)));
     if (showDebug)
         strUsage += HelpMessageOpt("-blockversion=<n>", "Override block version to test forking scenarios");
@@ -794,15 +793,6 @@ void InitParameterInteraction()
         if (gArgs.SoftSetBoolArg("-whitelistrelay", true))
             LogPrintf("%s: parameter interaction: -whitelistforcerelay=1 -> setting -whitelistrelay=1\n", __func__);
     }
-
-    if (gArgs.IsArgSet("-blockmaxsize")) {
-        unsigned int max_size = gArgs.GetArg("-blockmaxsize", 0);
-        if (gArgs.SoftSetArg("blockmaxweight", strprintf("%d", max_size * WITNESS_SCALE_FACTOR))) {
-            LogPrintf("%s: parameter interaction: -blockmaxsize=%d -> setting -blockmaxweight=%d (-blockmaxsize is deprecated!)\n", __func__, max_size, max_size * WITNESS_SCALE_FACTOR);
-        } else {
-            LogPrintf("%s: Ignoring blockmaxsize setting which is overridden by blockmaxweight", __func__);
-        }
-    }
 }
 
 static std::string ResolveErrMsg(const char * const optname, const std::string& strBind)
diff --git a/src/miner.cpp b/src/miner.cpp
index dda52790c6..298ea066fd 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -74,9 +74,7 @@ BlockAssembler::BlockAssembler(const CChainParams& params, const Options& option
 static BlockAssembler::Options DefaultOptions(const CChainParams& params)
 {
     // Block resource limits
-    // If neither -blockmaxsize or -blockmaxweight is given, limit to DEFAULT_BLOCK_MAX_*
-    // If only one is given, only restrict the specified resource.
-    // If both are given, restrict both.
+    // If -blockmaxweight is not given, limit to DEFAULT_BLOCK_MAX_WEIGHT
     BlockAssembler::Options options;
     options.nBlockMaxWeight = gArgs.GetArg("-blockmaxweight", DEFAULT_BLOCK_MAX_WEIGHT);
     if (gArgs.IsArgSet("-blockmintxfee")) {
diff --git a/src/net.cpp b/src/net.cpp
index 5f4c0eecab..ff68b182f0 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1619,7 +1619,8 @@ void CConnman::ThreadDNSAddressSeed()
             if (!resolveSource.SetInternal(host)) {
                 continue;
             }
-            if (LookupHost(host.c_str(), vIPs, 0, true))
+            unsigned int nMaxIPs = 256; // Limits number of IPs learned from a DNS seed
+            if (LookupHost(host.c_str(), vIPs, nMaxIPs, true))
             {
                 for (const CNetAddr& ip : vIPs)
                 {
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index afd90a3bc6..09ae8b1c68 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -945,6 +945,11 @@ void BitcoinGUI::changeEvent(QEvent *e)
                 QTimer::singleShot(0, this, SLOT(hide()));
                 e->ignore();
             }
+            else if((wsevt->oldState() & Qt::WindowMinimized) && !isMinimized())
+            {
+                QTimer::singleShot(0, this, SLOT(show()));
+                e->ignore();
+            }
         }
     }
 #endif
diff --git a/src/qt/optionsmodel.cpp b/src/qt/optionsmodel.cpp
index 4ade88d843..f5bf8f4d4d 100644
--- a/src/qt/optionsmodel.cpp
+++ b/src/qt/optionsmodel.cpp
@@ -29,6 +29,8 @@
 
 const char *DEFAULT_GUI_PROXY_HOST = "127.0.0.1";
 
+static const QString GetDefaultProxyAddress();
+
 OptionsModel::OptionsModel(QObject *parent, bool resetSettings) :
     QAbstractListModel(parent)
 {
@@ -126,7 +128,7 @@ void OptionsModel::Init(bool resetSettings)
     if (!settings.contains("fUseProxy"))
         settings.setValue("fUseProxy", false);
     if (!settings.contains("addrProxy"))
-        settings.setValue("addrProxy", QString("%1:%2").arg(DEFAULT_GUI_PROXY_HOST, DEFAULT_GUI_PROXY_PORT));
+        settings.setValue("addrProxy", GetDefaultProxyAddress());
     // Only try to set -proxy, if user has enabled fUseProxy
     if (settings.value("fUseProxy").toBool() && !gArgs.SoftSetArg("-proxy", settings.value("addrProxy").toString().toStdString()))
         addOverriddenOption("-proxy");
@@ -136,7 +138,7 @@ void OptionsModel::Init(bool resetSettings)
     if (!settings.contains("fUseSeparateProxyTor"))
         settings.setValue("fUseSeparateProxyTor", false);
     if (!settings.contains("addrSeparateProxyTor"))
-        settings.setValue("addrSeparateProxyTor", QString("%1:%2").arg(DEFAULT_GUI_PROXY_HOST, DEFAULT_GUI_PROXY_PORT));
+        settings.setValue("addrSeparateProxyTor", GetDefaultProxyAddress());
     // Only try to set -onion, if user has enabled fUseSeparateProxyTor
     if (settings.value("fUseSeparateProxyTor").toBool() && !gArgs.SoftSetArg("-onion", settings.value("addrSeparateProxyTor").toString().toStdString()))
         addOverriddenOption("-onion");
@@ -228,6 +230,11 @@ static void SetProxySetting(QSettings &settings, const QString &name, const Prox
     settings.setValue(name, ip_port.ip + ":" + ip_port.port);
 }
 
+static const QString GetDefaultProxyAddress()
+{
+    return QString("%1:%2").arg(DEFAULT_GUI_PROXY_HOST).arg(DEFAULT_GUI_PROXY_PORT);
+}
+
 // read QSettings values and return them
 QVariant OptionsModel::data(const QModelIndex & index, int role) const
 {
@@ -490,4 +497,16 @@ void OptionsModel::checkAndMigrate()
 
         settings.setValue(strSettingsVersionKey, CLIENT_VERSION);
     }
+
+    // Overwrite the 'addrProxy' setting in case it has been set to an illegal
+    // default value (see issue #12623; PR #12650).
+    if (settings.contains("addrProxy") && settings.value("addrProxy").toString().endsWith("%2")) {
+        settings.setValue("addrProxy", GetDefaultProxyAddress());
+    }
+
+    // Overwrite the 'addrSeparateProxyTor' setting in case it has been set to an illegal
+    // default value (see issue #12623; PR #12650).
+    if (settings.contains("addrSeparateProxyTor") && settings.value("addrSeparateProxyTor").toString().endsWith("%2")) {
+        settings.setValue("addrSeparateProxyTor", GetDefaultProxyAddress());
+    }
 }
diff --git a/test/functional/feature_fee_estimation.py b/test/functional/feature_fee_estimation.py
index 68453e50f4..438373ef8f 100755
--- a/test/functional/feature_fee_estimation.py
+++ b/test/functional/feature_fee_estimation.py
@@ -151,8 +151,8 @@ class EstimateFeeTest(BitcoinTestFramework):
         which we will use to generate our transactions.
         """
         self.add_nodes(3, extra_args=[["-maxorphantx=1000", "-whitelist=127.0.0.1"],
-                                      ["-blockmaxsize=17000", "-maxorphantx=1000", "-deprecatedrpc=estimatefee"],
-                                      ["-blockmaxsize=8000", "-maxorphantx=1000"]])
+                                      ["-maxorphantx=1000", "-deprecatedrpc=estimatefee"],
+                                      ["-maxorphantx=1000"]])
         # Use node0 to mine blocks for input splitting
         # Node1 mines small blocks but that are bigger than the expected transaction rate.
         # NOTE: the CreateNewBlock code starts counting block size at 1,000 bytes,
diff --git a/test/functional/feature_maxuploadtarget.py b/test/functional/feature_maxuploadtarget.py
index 45336ee801..1811d71945 100755
--- a/test/functional/feature_maxuploadtarget.py
+++ b/test/functional/feature_maxuploadtarget.py
@@ -34,7 +34,7 @@ class MaxUploadTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 1
-        self.extra_args = [["-maxuploadtarget=800", "-blockmaxsize=999000"]]
+        self.extra_args = [["-maxuploadtarget=800"]]
 
         # Cache for utxos, as the listunspent may take a long time later in the test
         self.utxo_cache = []
@@ -144,7 +144,7 @@ class MaxUploadTest(BitcoinTestFramework):
         #stop and start node 0 with 1MB maxuploadtarget, whitelist 127.0.0.1
         self.log.info("Restarting nodes with -whitelist=127.0.0.1")
         self.stop_node(0)
-        self.start_node(0, ["-whitelist=127.0.0.1", "-maxuploadtarget=1", "-blockmaxsize=999000"])
+        self.start_node(0, ["-whitelist=127.0.0.1", "-maxuploadtarget=1"])
 
         # Reconnect to self.nodes[0]
         self.nodes[0].add_p2p_connection(TestNode())
diff --git a/test/functional/feature_pruning.py b/test/functional/feature_pruning.py
index cb2dd1f6a8..16ee5e617a 100755
--- a/test/functional/feature_pruning.py
+++ b/test/functional/feature_pruning.py
@@ -31,14 +31,14 @@ class PruneTest(BitcoinTestFramework):
 
         # Create nodes 0 and 1 to mine.
         # Create node 2 to test pruning.
-        self.full_node_default_args = ["-maxreceivebuffer=20000","-blockmaxsize=999000", "-checkblocks=5", "-limitdescendantcount=100", "-limitdescendantsize=5000", "-limitancestorcount=100", "-limitancestorsize=5000" ]
+        self.full_node_default_args = ["-maxreceivebuffer=20000", "-checkblocks=5", "-limitdescendantcount=100", "-limitdescendantsize=5000", "-limitancestorcount=100", "-limitancestorsize=5000" ]
         # Create nodes 3 and 4 to test manual pruning (they will be re-started with manual pruning later)
         # Create nodes 5 to test wallet in prune mode, but do not connect
         self.extra_args = [self.full_node_default_args,
                            self.full_node_default_args,
                            ["-maxreceivebuffer=20000", "-prune=550"],
-                           ["-maxreceivebuffer=20000", "-blockmaxsize=999000"],
-                           ["-maxreceivebuffer=20000", "-blockmaxsize=999000"],
+                           ["-maxreceivebuffer=20000"],
+                           ["-maxreceivebuffer=20000"],
                            ["-prune=550"]]
 
     def setup_network(self):
@@ -124,7 +124,7 @@ class PruneTest(BitcoinTestFramework):
         # Reboot node 1 to clear its mempool (hopefully make the invalidate faster)
         # Lower the block max size so we don't keep mining all our big mempool transactions (from disconnected blocks)
         self.stop_node(1)
-        self.start_node(1, extra_args=["-maxreceivebuffer=20000","-blockmaxsize=5000", "-checkblocks=5", "-disablesafemode"])
+        self.start_node(1, extra_args=["-maxreceivebuffer=20000","-checkblocks=5", "-disablesafemode"])
 
         height = self.nodes[1].getblockcount()
         self.log.info("Current block height: %d" % height)
@@ -147,7 +147,7 @@ class PruneTest(BitcoinTestFramework):
 
         # Reboot node1 to clear those giant tx's from mempool
         self.stop_node(1)
-        self.start_node(1, extra_args=["-maxreceivebuffer=20000","-blockmaxsize=5000", "-checkblocks=5", "-disablesafemode"])
+        self.start_node(1, extra_args=["-maxreceivebuffer=20000","-checkblocks=5", "-disablesafemode"])
 
         self.log.info("Generating new longer chain of 300 more blocks")
         self.nodes[1].generate(300)