Add factory functions for Main/Test/Sig/Reg chainparams

This normalizes the behavior of initializing Main/Test/Sig/Reg
chainparams with RegTest/SigNet chainparams. These factory functions can
also easily be used from a context without an instantiated ArgsManager,
e.g. from libbitcoin kernel code, unlike the existing CreateChainParams
method.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/chainparams.h b/src/chainparams.h
index f2e2eb8bc0..30488510d7 100644
--- a/src/chainparams.h
+++ b/src/chainparams.h
@@ -151,6 +151,11 @@ public:
         bool fastprune{false};
     };
 
+    static std::unique_ptr<const CChainParams> RegTest(const RegTestOptions& options);
+    static std::unique_ptr<const CChainParams> SigNet(const SigNetOptions& options);
+    static std::unique_ptr<const CChainParams> Main();
+    static std::unique_ptr<const CChainParams> TestNet();
+
 protected:
     CChainParams() {}