Remove unnecessary dependencies for bitcoin-cli

This commit removes all the unnecessary dependencies (key, core,
netbase, sync, ...) from bitcoin-cli.

To do this it shards the chain parameters into BaseParams, which
contains just the RPC port and data directory (as used by utils and
bitcoin-cli) and Params, with the rest.

19 files changed, 232 insertions, 89 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index cd54b0496a..2d2ae2a4c1 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -20,10 +20,19 @@ endif
 BITCOIN_CONFIG_INCLUDES=-I$(builddir)/config
 BITCOIN_INCLUDES=-I$(builddir) -I$(builddir)/obj $(BOOST_CPPFLAGS) $(LEVELDB_CPPFLAGS)
 
+LIBBITCOIN_SERVER=libbitcoin_server.a
+LIBBITCOIN_WALLET=libbitcoin_wallet.a
+LIBBITCOIN_COMMON=libbitcoin_common.a
+LIBBITCOIN_CLI=libbitcoin_cli.a
+LIBBITCOIN_UTIL=libbitcoin_util.a
+LIBBITCOIN_CRYPTO=crypto/libbitcoin_crypto.a
+LIBBITCOINQT=qt/libbitcoinqt.a
+
 noinst_LIBRARIES = \
   libbitcoin_server.a \
   libbitcoin_common.a \
   libbitcoin_cli.a \
+  libbitcoin_util.a \
   crypto/libbitcoin_crypto.a
 if ENABLE_WALLET
 BITCOIN_INCLUDES += $(BDB_CPPFLAGS)
@@ -50,6 +59,7 @@ BITCOIN_CORE_H = \
   base58.h \
   bloom.h \
   chainparams.h \
+  chainparamsbase.h \
   checkpoints.h \
   checkqueue.h \
   clientversion.h \
@@ -107,8 +117,9 @@ obj/build.h: FORCE
 	@$(MKDIR_P) $(builddir)/obj
 	@$(top_srcdir)/share/genbuild.sh $(abs_top_builddir)/src/obj/build.h \
 	  $(abs_top_srcdir)
-libbitcoin_common_a-version.$(OBJEXT): obj/build.h
+libbitcoin_util_a-version.$(OBJEXT): obj/build.h
 
+# server: shared between bitcoind and bitcoin-qt
 libbitcoin_server_a_CPPFLAGS = $(BITCOIN_INCLUDES)
 libbitcoin_server_a_SOURCES = \
   addrman.cpp \
@@ -136,6 +147,8 @@ libbitcoin_server_a_SOURCES = \
   $(JSON_H) \
   $(BITCOIN_CORE_H)
 
+# wallet: shared between bitcoind and bitcoin-qt, but only linked
+# when wallet enabled
 libbitcoin_wallet_a_CPPFLAGS = $(BITCOIN_INCLUDES)
 libbitcoin_wallet_a_SOURCES = \
   db.cpp \
@@ -146,6 +159,7 @@ libbitcoin_wallet_a_SOURCES = \
   walletdb.cpp \
   $(BITCOIN_CORE_H)
 
+# crypto primitives library
 crypto_libbitcoin_crypto_a_CPPFLAGS = $(BITCOIN_CONFIG_INCLUDES)
 crypto_libbitcoin_crypto_a_SOURCES = \
   crypto/sha1.cpp \
@@ -156,6 +170,7 @@ crypto_libbitcoin_crypto_a_SOURCES = \
   crypto/sha1.h \
   crypto/ripemd160.h
 
+# common: shared between bitcoind, and bitcoin-qt and non-server tools
 libbitcoin_common_a_CPPFLAGS = $(BITCOIN_INCLUDES)
 libbitcoin_common_a_SOURCES = \
   base58.cpp \
@@ -166,8 +181,16 @@ libbitcoin_common_a_SOURCES = \
   key.cpp \
   netbase.cpp \
   protocol.cpp \
-  rpcprotocol.cpp \
   script.cpp \
+  $(BITCOIN_CORE_H)
+
+# util: shared between all executables.
+# This library *must* be included to make sure that the glibc
+# backward-compatibility objects and their sanity checks are linked.
+libbitcoin_util_a_CPPFLAGS = $(BITCOIN_INCLUDES)
+libbitcoin_util_a_SOURCES = \
+  chainparamsbase.cpp \
+  rpcprotocol.cpp \
   sync.cpp \
   util.cpp \
   version.cpp \
@@ -176,22 +199,24 @@ libbitcoin_common_a_SOURCES = \
   $(BITCOIN_CORE_H)
 
 if GLIBC_BACK_COMPAT
-libbitcoin_common_a_SOURCES += compat/glibc_compat.cpp
-libbitcoin_common_a_SOURCES += compat/glibcxx_compat.cpp
+libbitcoin_util_a_SOURCES += compat/glibc_compat.cpp
+libbitcoin_util_a_SOURCES += compat/glibcxx_compat.cpp
 endif
 
+# cli: shared between bitcoin-cli and bitcoin-qt
 libbitcoin_cli_a_SOURCES = \
   rpcclient.cpp \
   $(BITCOIN_CORE_H)
 
-nodist_libbitcoin_common_a_SOURCES = $(srcdir)/obj/build.h
+nodist_libbitcoin_util_a_SOURCES = $(srcdir)/obj/build.h
 #
 
 # bitcoind binary #
 bitcoind_LDADD = \
-  libbitcoin_server.a \
-  libbitcoin_common.a \
-  crypto/libbitcoin_crypto.a \
+  $(LIBBITCOIN_SERVER) \
+  $(LIBBITCOIN_COMMON) \
+  $(LIBBITCOIN_UTIL) \
+  $(LIBBITCOIN_CRYPTO) \
   $(LIBLEVELDB) \
   $(LIBMEMENV)
 if ENABLE_WALLET
@@ -209,11 +234,13 @@ bitcoind_CPPFLAGS = $(BITCOIN_INCLUDES)
 
 # bitcoin-cli binary #
 bitcoin_cli_LDADD = \
-  libbitcoin_cli.a \
-  libbitcoin_common.a \
-  crypto/libbitcoin_crypto.a \
+  $(LIBBITCOIN_CLI) \
+  $(LIBBITCOIN_COMMON) \
+  $(LIBBITCOIN_UTIL) \
+  $(LIBBITCOIN_CRYPTO) \
   $(BOOST_LIBS)
-bitcoin_cli_SOURCES = bitcoin-cli.cpp
+bitcoin_cli_SOURCES = \
+  bitcoin-cli.cpp
 bitcoin_cli_CPPFLAGS = $(BITCOIN_INCLUDES)
 #
 
@@ -244,13 +271,6 @@ clean-local:
 	@test -f $(PROTOC)
 	$(AM_V_GEN) $(PROTOC) --cpp_out=$(@D) --proto_path=$(abspath $(<D) $<)
 
-LIBBITCOIN_SERVER=libbitcoin_server.a
-LIBBITCOIN_WALLET=libbitcoin_wallet.a
-LIBBITCOIN_COMMON=libbitcoin_common.a
-LIBBITCOIN_CLI=libbitcoin_cli.a
-LIBBITCOIN_CRYPTO=crypto/libbitcoin_crypto.a
-LIBBITCOINQT=qt/libbitcoinqt.a
-
 if ENABLE_TESTS
 include Makefile.test.include
 endif
diff --git a/src/Makefile.qt.include b/src/Makefile.qt.include
index 091138dc38..9df0779ba3 100644
--- a/src/Makefile.qt.include
+++ b/src/Makefile.qt.include
@@ -355,7 +355,7 @@ qt_bitcoin_qt_LDADD = qt/libbitcoinqt.a $(LIBBITCOIN_SERVER)
 if ENABLE_WALLET
 qt_bitcoin_qt_LDADD += $(LIBBITCOIN_WALLET)
 endif
-qt_bitcoin_qt_LDADD += $(LIBBITCOIN_CLI) $(LIBBITCOIN_COMMON) $(LIBBITCOIN_CRYPTO) $(LIBLEVELDB) $(LIBMEMENV) \
+qt_bitcoin_qt_LDADD += $(LIBBITCOIN_CLI) $(LIBBITCOIN_COMMON) $(LIBBITCOIN_UTIL) $(LIBBITCOIN_CRYPTO) $(LIBLEVELDB) $(LIBMEMENV) \
   $(BOOST_LIBS) $(QT_LIBS) $(QT_DBUS_LIBS) $(QR_LIBS) $(PROTOBUF_LIBS) $(BDB_LIBS)
 qt_bitcoin_qt_LDFLAGS = $(QT_LDFLAGS)
 
@@ -364,7 +364,7 @@ QT_QM=$(QT_TS:.ts=.qm)
 
 .SECONDARY: $(QT_QM)
 
-qt/bitcoinstrings.cpp: $(libbitcoin_server_a_SOURCES) $(libbitcoin_common_a_SOURCES) $(libbitcoin_cli_a_SOURCES)
+qt/bitcoinstrings.cpp: $(libbitcoin_server_a_SOURCES) $(libbitcoin_common_a_SOURCES) $(libbitcoin_cli_a_SOURCES) $(libbitcoin_util_a_SOURCES)
 	@test -n $(XGETTEXT) || echo "xgettext is required for updating translations"
 	$(AM_V_GEN) cd $(top_srcdir); XGETTEXT=$(XGETTEXT) share/qt/extract_strings_qt.py
 
diff --git a/src/Makefile.qttest.include b/src/Makefile.qttest.include
index 0aa31a406d..a509f23755 100644
--- a/src/Makefile.qttest.include
+++ b/src/Makefile.qttest.include
@@ -30,7 +30,7 @@ qt_test_test_bitcoin_qt_LDADD = $(LIBBITCOINQT) $(LIBBITCOIN_SERVER)
 if ENABLE_WALLET
 qt_test_test_bitcoin_qt_LDADD += $(LIBBITCOIN_WALLET)
 endif
-qt_test_test_bitcoin_qt_LDADD += $(LIBBITCOIN_CLI) $(LIBBITCOIN_COMMON) $(LIBBITCOIN_CRYPTO) $(LIBLEVELDB) \
+qt_test_test_bitcoin_qt_LDADD += $(LIBBITCOIN_CLI) $(LIBBITCOIN_COMMON) $(LIBBITCOIN_UTIL) $(LIBBITCOIN_CRYPTO) $(LIBLEVELDB) \
   $(LIBMEMENV) $(BOOST_LIBS) $(QT_DBUS_LIBS) $(QT_TEST_LIBS) $(QT_LIBS) \
   $(QR_LIBS) $(PROTOBUF_LIBS) $(BDB_LIBS)
 qt_test_test_bitcoin_qt_LDFLAGS = $(QT_LDFLAGS)
diff --git a/src/Makefile.test.include b/src/Makefile.test.include
index 64f997f4b5..4dab1773f4 100644
--- a/src/Makefile.test.include
+++ b/src/Makefile.test.include
@@ -63,7 +63,7 @@ endif
 
 test_test_bitcoin_SOURCES = $(BITCOIN_TESTS) $(JSON_TEST_FILES) $(RAW_TEST_FILES)
 test_test_bitcoin_CPPFLAGS = $(BITCOIN_INCLUDES) -I$(builddir)/test/ $(TESTDEFS)
-test_test_bitcoin_LDADD = $(LIBBITCOIN_SERVER) $(LIBBITCOIN_CLI) $(LIBBITCOIN_COMMON) $(LIBBITCOIN_CRYPTO) $(LIBLEVELDB) $(LIBMEMENV) \
+test_test_bitcoin_LDADD = $(LIBBITCOIN_SERVER) $(LIBBITCOIN_CLI) $(LIBBITCOIN_COMMON) $(LIBBITCOIN_UTIL) $(LIBBITCOIN_CRYPTO) $(LIBLEVELDB) $(LIBMEMENV) \
   $(BOOST_LIBS) $(BOOST_UNIT_TEST_FRAMEWORK_LIB)
 if ENABLE_WALLET
 test_test_bitcoin_LDADD += $(LIBBITCOIN_WALLET)
diff --git a/src/bitcoin-cli.cpp b/src/bitcoin-cli.cpp
index 40b45415c4..db39df4b17 100644
--- a/src/bitcoin-cli.cpp
+++ b/src/bitcoin-cli.cpp
@@ -8,7 +8,7 @@
 #include "rpcclient.h"
 #include "rpcprotocol.h"
 #include "ui_interface.h" /* for _(...) */
-#include "chainparams.h"
+#include "chainparamsbase.h"
 
 #include <boost/filesystem/operations.hpp>
 
@@ -60,12 +60,11 @@ static bool AppInitRPC(int argc, char* argv[])
         fprintf(stderr,"Error reading configuration file: %s\n", e.what());
         return false;
     }
-    // Check for -testnet or -regtest parameter (Params() calls are only valid after this clause)
-    if (!SelectParamsFromCommandLine()) {
+    // Check for -testnet or -regtest parameter (BaseParams() calls are only valid after this clause)
+    if (!SelectBaseParamsFromCommandLine()) {
         fprintf(stderr, "Error: Invalid combination of -regtest and -testnet.\n");
         return false;
     }
-
     if (argc<2 || mapArgs.count("-?") || mapArgs.count("-help") || mapArgs.count("-version"))
     {
         std::string strUsage = _("Bitcoin Core RPC client version") + " " + FormatFullVersion() + "\n";
@@ -104,7 +103,7 @@ Object CallRPC(const string& strMethod, const Array& params)
 
     bool fWait = GetBoolArg("-rpcwait", false); // -rpcwait means try until server has started
     do {
-        bool fConnected = d.connect(GetArg("-rpcconnect", "127.0.0.1"), GetArg("-rpcport", itostr(Params().RPCPort())));
+        bool fConnected = d.connect(GetArg("-rpcconnect", "127.0.0.1"), GetArg("-rpcport", itostr(BaseParams().RPCPort())));
         if (fConnected) break;
         if (fWait)
             MilliSleep(1000);
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index eb56af750e..63067a153d 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -99,7 +99,7 @@ unsigned int pnSeed[] =
 class CMainParams : public CChainParams {
 public:
     CMainParams() {
-        networkID = CChainParams::MAIN;
+        networkID = CBaseChainParams::MAIN;
         strNetworkID = "main";
         // The message start string is designed to be unlikely to occur in normal data.
         // The characters are rarely used upper ASCII, not valid as UTF-8, and produce
@@ -110,7 +110,6 @@ public:
         pchMessageStart[3] = 0xd9;
         vAlertPubKey = ParseHex("04fc9702847840aaf195de8442ebecedf5b095cdbb9bc716bda9110971b28a49e0ead8564ff0db22209e0374782c093bb899692d524e9d6a6956e7c5ecbcd68284");
         nDefaultPort = 8333;
-        nRPCPort = 8332;
         bnProofOfWorkLimit = ~uint256(0) >> 32;
         nSubsidyHalvingInterval = 210000;
         nEnforceBlockUpgradeMajority = 750;
@@ -191,7 +190,7 @@ static CMainParams mainParams;
 class CTestNetParams : public CMainParams {
 public:
     CTestNetParams() {
-        networkID = CChainParams::TESTNET;
+        networkID = CBaseChainParams::TESTNET;
         strNetworkID = "test";
         // The message start string is designed to be unlikely to occur in normal data.
         // The characters are rarely used upper ASCII, not valid as UTF-8, and produce
@@ -202,14 +201,12 @@ public:
         pchMessageStart[3] = 0x07;
         vAlertPubKey = ParseHex("04302390343f91cc401d56d68b123028bf52e5fca1939df127f63c6467cdf9c8e2c14b61104cf817d0b780da337893ecc4aaff1309e536162dabbdb45200ca2b0a");
         nDefaultPort = 18333;
-        nRPCPort = 18332;
         nEnforceBlockUpgradeMajority = 51;
         nRejectBlockOutdatedMajority = 75;
         nToCheckBlockUpgradeMajority = 100;
         nMinerThreads = 0;
         nTargetTimespan = 14 * 24 * 60 * 60; // two weeks
         nTargetSpacing = 10 * 60;
-        strDataDir = "testnet3";
 
         // Modify the testnet genesis block so the timestamp is valid for a later start.
         genesis.nTime = 1296688602;
@@ -245,7 +242,7 @@ static CTestNetParams testNetParams;
 class CRegTestParams : public CTestNetParams {
 public:
     CRegTestParams() {
-        networkID = CChainParams::REGTEST;
+        networkID = CBaseChainParams::REGTEST;
         strNetworkID = "regtest";
         pchMessageStart[0] = 0xfa;
         pchMessageStart[1] = 0xbf;
@@ -264,7 +261,6 @@ public:
         genesis.nNonce = 2;
         hashGenesisBlock = genesis.GetHash();
         nDefaultPort = 18444;
-        strDataDir = "regtest";
         assert(hashGenesisBlock == uint256("0x0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"));
 
         vSeeds.clear();  // Regtest mode doesn't have any DNS seeds.
@@ -279,21 +275,23 @@ public:
 };
 static CRegTestParams regTestParams;
 
-static CChainParams *pCurrentParams = &mainParams;
+static CChainParams *pCurrentParams = 0;
 
 const CChainParams &Params() {
+    assert(pCurrentParams);
     return *pCurrentParams;
 }
 
-void SelectParams(CChainParams::Network network) {
+void SelectParams(CBaseChainParams::Network network) {
+    SelectBaseParams(network);
     switch (network) {
-        case CChainParams::MAIN:
+        case CBaseChainParams::MAIN:
             pCurrentParams = &mainParams;
             break;
-        case CChainParams::TESTNET:
+        case CBaseChainParams::TESTNET:
             pCurrentParams = &testNetParams;
             break;
-        case CChainParams::REGTEST:
+        case CBaseChainParams::REGTEST:
             pCurrentParams = &regTestParams;
             break;
         default:
@@ -303,19 +301,9 @@ void SelectParams(CChainParams::Network network) {
 }
 
 bool SelectParamsFromCommandLine() {
-    bool fRegTest = GetBoolArg("-regtest", false);
-    bool fTestNet = GetBoolArg("-testnet", false);
-
-    if (fTestNet && fRegTest) {
+    if (!SelectBaseParamsFromCommandLine())
         return false;
-    }
 
-    if (fRegTest) {
-        SelectParams(CChainParams::REGTEST);
-    } else if (fTestNet) {
-        SelectParams(CChainParams::TESTNET);
-    } else {
-        SelectParams(CChainParams::MAIN);
-    }
+    SelectParams(BaseParams().NetworkID());
     return true;
 }
diff --git a/src/chainparams.h b/src/chainparams.h
index e9774bbfa2..446256ba82 100644
--- a/src/chainparams.h
+++ b/src/chainparams.h
@@ -7,6 +7,7 @@
 #define BITCOIN_CHAIN_PARAMS_H
 
 #include "core.h"
+#include "chainparamsbase.h"
 #include "protocol.h"
 #include "uint256.h"
 
@@ -29,14 +30,6 @@ struct CDNSSeedData {
 class CChainParams
 {
 public:
-    enum Network {
-        MAIN,
-        TESTNET,
-        REGTEST,
-
-        MAX_NETWORK_TYPES
-    };
-
     enum Base58Type {
         PUBKEY_ADDRESS,
         SCRIPT_ADDRESS,
@@ -73,17 +66,15 @@ public:
     int64_t TargetTimespan() const { return nTargetTimespan; }
     int64_t TargetSpacing() const { return nTargetSpacing; }
     int64_t Interval() const { return nTargetTimespan / nTargetSpacing; }
-    const std::string& DataDir() const { return strDataDir; }
     /* Make miner stop after a block is found. In RPC, don't return
      * until nGenProcLimit blocks are generated */
     bool MineBlocksOnDemand() const { return fMineBlocksOnDemand; }
-    Network NetworkID() const { return networkID; }
+    CBaseChainParams::Network NetworkID() const { return networkID; }
     /* Return the BIP70 network string (main, test or regtest) */
     std::string NetworkIDString() const { return strNetworkID; }
     const std::vector<CDNSSeedData>& DNSSeeds() const { return vSeeds; }
     const std::vector<unsigned char>& Base58Prefix(Base58Type type) const { return base58Prefixes[type]; }
     const std::vector<CAddress>& FixedSeeds() const { return vFixedSeeds; }
-    int RPCPort() const { return nRPCPort; }
 protected:
     CChainParams() {}
 
@@ -92,7 +83,6 @@ protected:
     // Raw pub key bytes for the broadcast alert signing key.
     std::vector<unsigned char> vAlertPubKey;
     int nDefaultPort;
-    int nRPCPort;
     uint256 bnProofOfWorkLimit;
     int nSubsidyHalvingInterval;
     int nEnforceBlockUpgradeMajority;
@@ -100,11 +90,10 @@ protected:
     int nToCheckBlockUpgradeMajority;
     int64_t nTargetTimespan;
     int64_t nTargetSpacing;
-    std::string strDataDir;
     int nMinerThreads;
     std::vector<CDNSSeedData> vSeeds;
     std::vector<unsigned char> base58Prefixes[MAX_BASE58_TYPES];
-    Network networkID;
+    CBaseChainParams::Network networkID;
     std::string strNetworkID;
     CBlock genesis;
     std::vector<CAddress> vFixedSeeds;
@@ -123,7 +112,7 @@ protected:
 const CChainParams &Params();
 
 /** Sets the params returned by Params() to those for the given network. */
-void SelectParams(CChainParams::Network network);
+void SelectParams(CBaseChainParams::Network network);
 
 /**
  * Looks for -regtest or -testnet and then calls SelectParams as appropriate.
diff --git a/src/chainparamsbase.cpp b/src/chainparamsbase.cpp
new file mode 100644
index 0000000000..19a9e72cc9
--- /dev/null
+++ b/src/chainparamsbase.cpp
@@ -0,0 +1,93 @@
+// Copyright (c) 2010 Satoshi Nakamoto
+// Copyright (c) 2009-2014 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "chainparamsbase.h"
+
+#include "assert.h"
+#include "util.h"
+
+#include <boost/assign/list_of.hpp>
+
+using namespace boost::assign;
+
+//
+// Main network
+//
+
+class CBaseMainParams : public CBaseChainParams {
+public:
+    CBaseMainParams() {
+        networkID = CBaseChainParams::MAIN;
+        nRPCPort = 8332;
+    }
+};
+static CBaseMainParams mainParams;
+
+//
+// Testnet (v3)
+//
+class CBaseTestNetParams : public CBaseMainParams {
+public:
+    CBaseTestNetParams() {
+        networkID = CBaseChainParams::TESTNET;
+        nRPCPort = 18332;
+        strDataDir = "testnet3";
+    }
+};
+static CBaseTestNetParams testNetParams;
+
+//
+// Regression test
+//
+class CBaseRegTestParams : public CBaseTestNetParams {
+public:
+    CBaseRegTestParams() {
+        networkID = CBaseChainParams::REGTEST;
+        strDataDir = "regtest";
+    }
+};
+static CBaseRegTestParams regTestParams;
+
+static CBaseChainParams *pCurrentBaseParams = 0;
+
+const CBaseChainParams &BaseParams() {
+    assert(pCurrentBaseParams);
+    return *pCurrentBaseParams;
+}
+
+void SelectBaseParams(CBaseChainParams::Network network) {
+    switch (network) {
+        case CBaseChainParams::MAIN:
+            pCurrentBaseParams = &mainParams;
+            break;
+        case CBaseChainParams::TESTNET:
+            pCurrentBaseParams = &testNetParams;
+            break;
+        case CBaseChainParams::REGTEST:
+            pCurrentBaseParams = &regTestParams;
+            break;
+        default:
+            assert(false && "Unimplemented network");
+            return;
+    }
+}
+
+bool SelectBaseParamsFromCommandLine() {
+    bool fRegTest = GetBoolArg("-regtest", false);
+    bool fTestNet = GetBoolArg("-testnet", false);
+
+    if (fTestNet && fRegTest) {
+        return false;
+    }
+
+    if (fRegTest) {
+        SelectBaseParams(CBaseChainParams::REGTEST);
+    } else if (fTestNet) {
+        SelectBaseParams(CBaseChainParams::TESTNET);
+    } else {
+        SelectBaseParams(CBaseChainParams::MAIN);
+    }
+    return true;
+}
diff --git a/src/chainparamsbase.h b/src/chainparamsbase.h
new file mode 100644
index 0000000000..4a3b268909
--- /dev/null
+++ b/src/chainparamsbase.h
@@ -0,0 +1,52 @@
+// Copyright (c) 2014 The Bitcoin developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_CHAIN_PARAMS_BASE_H
+#define BITCOIN_CHAIN_PARAMS_BASE_H
+
+#include <vector>
+#include <string>
+
+/**
+ * CBaseChainParams defines the base parameters (shared between bitcoin-cli and bitcoind)
+ * of a given instance of the Bitcoin system.
+ */
+class CBaseChainParams
+{
+public:
+    enum Network {
+        MAIN,
+        TESTNET,
+        REGTEST,
+
+        MAX_NETWORK_TYPES
+    };
+
+    const std::string& DataDir() const { return strDataDir; }
+    int RPCPort() const { return nRPCPort; }
+    Network NetworkID() const { return networkID; }
+protected:
+    CBaseChainParams() {}
+
+    int nRPCPort;
+    std::string strDataDir;
+    Network networkID;
+};
+
+/**
+ * Return the currently selected parameters. This won't change after app startup
+ * outside of the unit tests.
+ */
+const CBaseChainParams &BaseParams();
+
+/** Sets the params returned by Params() to those for the given network. */
+void SelectBaseParams(CBaseChainParams::Network network);
+
+/**
+ * Looks for -regtest or -testnet and then calls SelectParams as appropriate.
+ * Returns false if an invalid combination is given.
+ */
+bool SelectBaseParamsFromCommandLine();
+
+#endif
diff --git a/src/checkpoints.cpp b/src/checkpoints.cpp
index 926949e06a..75ac418916 100644
--- a/src/checkpoints.cpp
+++ b/src/checkpoints.cpp
@@ -83,9 +83,9 @@ namespace Checkpoints
     };
 
     const CCheckpointData &Checkpoints() {
-        if (Params().NetworkID() == CChainParams::TESTNET)
+        if (Params().NetworkID() == CBaseChainParams::TESTNET)
             return dataTestnet;
-        else if (Params().NetworkID() == CChainParams::MAIN)
+        else if (Params().NetworkID() == CBaseChainParams::MAIN)
             return data;
         else
             return dataRegtest;
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index 76dddb103c..89305e9f35 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -546,7 +546,7 @@ int main(int argc, char *argv[])
     if (!PaymentServer::ipcParseCommandLine(argc, argv))
         exit(0);
 #endif
-    bool isaTestNet = Params().NetworkID() != CChainParams::MAIN;
+    bool isaTestNet = Params().NetworkID() != CBaseChainParams::MAIN;
     // Allow for separate UI settings for testnets
     if (isaTestNet)
         QApplication::setApplicationName(QAPP_APP_NAME_TESTNET);
diff --git a/src/qt/paymentserver.cpp b/src/qt/paymentserver.cpp
index 49923a1afc..fbb11617fe 100644
--- a/src/qt/paymentserver.cpp
+++ b/src/qt/paymentserver.cpp
@@ -199,10 +199,10 @@ bool PaymentServer::ipcParseCommandLine(int argc, char* argv[])
             {
                 CBitcoinAddress address(r.address.toStdString());
 
-                SelectParams(CChainParams::MAIN);
+                SelectParams(CBaseChainParams::MAIN);
                 if (!address.IsValid())
                 {
-                    SelectParams(CChainParams::TESTNET);
+                    SelectParams(CBaseChainParams::TESTNET);
                 }
             }
         }
@@ -214,9 +214,9 @@ bool PaymentServer::ipcParseCommandLine(int argc, char* argv[])
             if (readPaymentRequest(arg, request))
             {
                 if (request.getDetails().network() == "main")
-                    SelectParams(CChainParams::MAIN);
+                    SelectParams(CBaseChainParams::MAIN);
                 else
-                    SelectParams(CChainParams::TESTNET);
+                    SelectParams(CBaseChainParams::TESTNET);
             }
         }
         else
diff --git a/src/qt/test/paymentservertests.cpp b/src/qt/test/paymentservertests.cpp
index 7dee7a9cda..e92a7d2b1a 100644
--- a/src/qt/test/paymentservertests.cpp
+++ b/src/qt/test/paymentservertests.cpp
@@ -56,6 +56,7 @@ static SendCoinsRecipient handleRequest(PaymentServer* server, std::vector<unsig
 
 void PaymentServerTests::paymentServerTests()
 {
+    SelectParams(CBaseChainParams::MAIN);
     OptionsModel optionsModel;
     PaymentServer* server = new PaymentServer(NULL, false);
     X509_STORE* caStore = X509_STORE_new();
diff --git a/src/rpcmining.cpp b/src/rpcmining.cpp
index f60070eb5b..0072557f87 100644
--- a/src/rpcmining.cpp
+++ b/src/rpcmining.cpp
@@ -237,7 +237,7 @@ Value getmininginfo(const Array& params, bool fHelp)
     obj.push_back(Pair("genproclimit",     (int)GetArg("-genproclimit", -1)));
     obj.push_back(Pair("networkhashps",    getnetworkhashps(params, false)));
     obj.push_back(Pair("pooledtx",         (uint64_t)mempool.size()));
-    obj.push_back(Pair("testnet",          Params().NetworkID() == CChainParams::TESTNET));
+    obj.push_back(Pair("testnet",          Params().NetworkID() == CBaseChainParams::TESTNET));
     obj.push_back(Pair("chain",            Params().NetworkIDString()));
 #ifdef ENABLE_WALLET
     obj.push_back(Pair("generate",         getgenerate(params, false)));
diff --git a/src/rpcmisc.cpp b/src/rpcmisc.cpp
index 2694e2bcf1..a300de2680 100644
--- a/src/rpcmisc.cpp
+++ b/src/rpcmisc.cpp
@@ -74,7 +74,7 @@ Value getinfo(const Array& params, bool fHelp)
     obj.push_back(Pair("connections",   (int)vNodes.size()));
     obj.push_back(Pair("proxy",         (proxy.first.IsValid() ? proxy.first.ToStringIPPort() : string())));
     obj.push_back(Pair("difficulty",    (double)GetDifficulty()));
-    obj.push_back(Pair("testnet",       Params().NetworkID() == CChainParams::TESTNET));
+    obj.push_back(Pair("testnet",       Params().NetworkID() == CBaseChainParams::TESTNET));
 #ifdef ENABLE_WALLET
     if (pwalletMain) {
         obj.push_back(Pair("keypoololdest", pwalletMain->GetOldestKeyPoolTime()));
diff --git a/src/rpcserver.cpp b/src/rpcserver.cpp
index 93da81e429..c5d09cf577 100644
--- a/src/rpcserver.cpp
+++ b/src/rpcserver.cpp
@@ -600,7 +600,7 @@ void StartRPCThreads()
 
     std::vector<ip::tcp::endpoint> vEndpoints;
     bool bBindAny = false;
-    int defaultPort = GetArg("-rpcport", Params().RPCPort());
+    int defaultPort = GetArg("-rpcport", BaseParams().RPCPort());
     if (!mapArgs.count("-rpcallowip")) // Default to loopback if not allowing external IPs
     {
         vEndpoints.push_back(ip::tcp::endpoint(asio::ip::address_v6::loopback(), defaultPort));
diff --git a/src/test/base58_tests.cpp b/src/test/base58_tests.cpp
index b81a19cfd8..0ac3e9a363 100644
--- a/src/test/base58_tests.cpp
+++ b/src/test/base58_tests.cpp
@@ -142,9 +142,9 @@ BOOST_AUTO_TEST_CASE(base58_keys_valid_parse)
         bool isPrivkey = find_value(metadata, "isPrivkey").get_bool();
         bool isTestnet = find_value(metadata, "isTestnet").get_bool();
         if (isTestnet)
-            SelectParams(CChainParams::TESTNET);
+            SelectParams(CBaseChainParams::TESTNET);
         else
-            SelectParams(CChainParams::MAIN);
+            SelectParams(CBaseChainParams::MAIN);
         if(isPrivkey)
         {
             bool isCompressed = find_value(metadata, "isCompressed").get_bool();
@@ -175,7 +175,7 @@ BOOST_AUTO_TEST_CASE(base58_keys_valid_parse)
             BOOST_CHECK_MESSAGE(!secret.IsValid(), "IsValid pubkey as privkey:" + strTest);
         }
     }
-    SelectParams(CChainParams::MAIN);
+    SelectParams(CBaseChainParams::MAIN);
 }
 
 // Goal: check that generated keys match test vectors
@@ -198,9 +198,9 @@ BOOST_AUTO_TEST_CASE(base58_keys_valid_gen)
         bool isPrivkey = find_value(metadata, "isPrivkey").get_bool();
         bool isTestnet = find_value(metadata, "isTestnet").get_bool();
         if (isTestnet)
-            SelectParams(CChainParams::TESTNET);
+            SelectParams(CBaseChainParams::TESTNET);
         else
-            SelectParams(CChainParams::MAIN);
+            SelectParams(CBaseChainParams::MAIN);
         if(isPrivkey)
         {
             bool isCompressed = find_value(metadata, "isCompressed").get_bool();
@@ -243,7 +243,7 @@ BOOST_AUTO_TEST_CASE(base58_keys_valid_gen)
     CTxDestination nodest = CNoDestination();
     BOOST_CHECK(!dummyAddr.Set(nodest));
 
-    SelectParams(CChainParams::MAIN);
+    SelectParams(CBaseChainParams::MAIN);
 }
 
 // Goal: check that base58 parsing code is robust against a variety of corrupted data
diff --git a/src/test/test_bitcoin.cpp b/src/test/test_bitcoin.cpp
index 2d993e24db..8cae0a4c34 100644
--- a/src/test/test_bitcoin.cpp
+++ b/src/test/test_bitcoin.cpp
@@ -31,6 +31,7 @@ struct TestingSetup {
 
     TestingSetup() {
         fPrintToDebugLog = false; // don't want to write to debug.log file
+        SelectParams(CBaseChainParams::MAIN);
         noui_connect();
 #ifdef ENABLE_WALLET
         bitdb.MakeMock();
diff --git a/src/util.cpp b/src/util.cpp
index a19c015da6..7a0e2cc800 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -5,7 +5,7 @@
 
 #include "util.h"
 
-#include "chainparams.h"
+#include "chainparamsbase.h"
 #include "sync.h"
 #include "ui_interface.h"
 #include "uint256.h"
@@ -918,7 +918,7 @@ boost::filesystem::path GetDefaultDataDir()
 #endif
 }
 
-static boost::filesystem::path pathCached[CChainParams::MAX_NETWORK_TYPES+1];
+static boost::filesystem::path pathCached[CBaseChainParams::MAX_NETWORK_TYPES+1];
 static CCriticalSection csPathCached;
 
 const boost::filesystem::path &GetDataDir(bool fNetSpecific)
@@ -927,8 +927,8 @@ const boost::filesystem::path &GetDataDir(bool fNetSpecific)
 
     LOCK(csPathCached);
 
-    int nNet = CChainParams::MAX_NETWORK_TYPES;
-    if (fNetSpecific) nNet = Params().NetworkID();
+    int nNet = CBaseChainParams::MAX_NETWORK_TYPES;
+    if (fNetSpecific) nNet = BaseParams().NetworkID();
 
     fs::path &path = pathCached[nNet];
 
@@ -947,7 +947,7 @@ const boost::filesystem::path &GetDataDir(bool fNetSpecific)
         path = GetDefaultDataDir();
     }
     if (fNetSpecific)
-        path /= Params().DataDir();
+        path /= BaseParams().DataDir();
 
     fs::create_directories(path);
 
@@ -956,7 +956,7 @@ const boost::filesystem::path &GetDataDir(bool fNetSpecific)
 
 void ClearDatadirCache()
 {
-    std::fill(&pathCached[0], &pathCached[CChainParams::MAX_NETWORK_TYPES+1],
+    std::fill(&pathCached[0], &pathCached[CBaseChainParams::MAX_NETWORK_TYPES+1],
         boost::filesystem::path());
 }