add --regtest and --fixed-difficulty for regression testing

on_generateblocks RPC call combines functionality from the on_getblocktemplate and on_submitblock RPC calls to allow rapid block creation. Difficulty is set permanently to 1 for regtest.
Makes use of FAKECHAIN network type, but takes hard fork heights from mainchain
Default reserve_size in generate_blocks RPC call is now 1. If it is 0, the following error occurs 'Failed to calculate offset for'.
Queries hard fork heights info of other network types

2 files changed, 5 insertions, 3 deletions

diff --git a/src/daemon/daemon.cpp b/src/daemon/daemon.cpp
index 48671f190..ea24e32eb 100644
--- a/src/daemon/daemon.cpp
+++ b/src/daemon/daemon.cpp
@@ -77,9 +77,10 @@ public:
 
     const auto testnet = command_line::get_arg(vm, cryptonote::arg_testnet_on);
     const auto stagenet = command_line::get_arg(vm, cryptonote::arg_stagenet_on);
+    const auto regtest = command_line::get_arg(vm, cryptonote::arg_regtest_on);
     const auto restricted = command_line::get_arg(vm, cryptonote::core_rpc_server::arg_restricted_rpc);
     const auto main_rpc_port = command_line::get_arg(vm, cryptonote::core_rpc_server::arg_rpc_bind_port);
-    rpcs.emplace_back(new t_rpc{vm, core, p2p, restricted, testnet ? cryptonote::TESTNET : stagenet ? cryptonote::STAGENET : cryptonote::MAINNET, main_rpc_port, "core"});
+    rpcs.emplace_back(new t_rpc{vm, core, p2p, restricted, testnet ? cryptonote::TESTNET : stagenet ? cryptonote::STAGENET : regtest ? cryptonote::FAKECHAIN : cryptonote::MAINNET, main_rpc_port, "core"});
 
     auto restricted_rpc_port_arg = cryptonote::core_rpc_server::arg_rpc_restricted_bind_port;
     if(!command_line::is_arg_defaulted(vm, restricted_rpc_port_arg))
diff --git a/src/daemon/main.cpp b/src/daemon/main.cpp
index 49494e889..711de0736 100644
--- a/src/daemon/main.cpp
+++ b/src/daemon/main.cpp
@@ -162,9 +162,10 @@ int main(int argc, char const * argv[])
 
     const bool testnet = command_line::get_arg(vm, cryptonote::arg_testnet_on);
     const bool stagenet = command_line::get_arg(vm, cryptonote::arg_stagenet_on);
-    if (testnet && stagenet)
+    const bool regtest = command_line::get_arg(vm, cryptonote::arg_regtest_on);
+    if (testnet + stagenet + regtest > 1)
     {
-      std::cerr << "Can't specify more than one of --tesnet and --stagenet" << ENDL;
+      std::cerr << "Can't specify more than one of --tesnet and --stagenet and --regtest" << ENDL;
       return 1;
     }