Add WriteHDKeypath function and move *HDKeypath to util/bip32.{h,cpp}

Creates new files util/bip32.h and util/bip32.cpp for containing
BIP 32 stuff.
Moves FormatKeyPath from descriptor.cpp to util/bip32.
Adds a wrapper around it to prepent the 'm' for when just the
BIP 32 style keypath is needed.

1 files changed, 0 insertions, 41 deletions

diff --git a/src/util/strencodings.cpp b/src/util/strencodings.cpp
index b55547bc63..0acbb4f117 100644
--- a/src/util/strencodings.cpp
+++ b/src/util/strencodings.cpp
@@ -546,47 +546,6 @@ bool ParseFixedPoint(const std::string &val, int decimals, int64_t *amount_out)
     return true;
 }
 
-bool ParseHDKeypath(const std::string& keypath_str, std::vector<uint32_t>& keypath)
-{
-    std::stringstream ss(keypath_str);
-    std::string item;
-    bool first = true;
-    while (std::getline(ss, item, '/')) {
-        if (item.compare("m") == 0) {
-            if (first) {
-                first = false;
-                continue;
-            }
-            return false;
-        }
-        // Finds whether it is hardened
-        uint32_t path = 0;
-        size_t pos = item.find("'");
-        if (pos != std::string::npos) {
-            // The hardened tick can only be in the last index of the string
-            if (pos != item.size() - 1) {
-                return false;
-            }
-            path |= 0x80000000;
-            item = item.substr(0, item.size() - 1); // Drop the last character which is the hardened tick
-        }
-
-        // Ensure this is only numbers
-        if (item.find_first_not_of( "0123456789" ) != std::string::npos) {
-            return false;
-        }
-        uint32_t number;
-        if (!ParseUInt32(item, &number)) {
-            return false;
-        }
-        path |= number;
-
-        keypath.push_back(path);
-        first = false;
-    }
-    return true;
-}
-
 void Downcase(std::string& str)
 {
     std::transform(str.begin(), str.end(), str.begin(), [](char c){return ToLower(c);});