/// <summary>
/// Derives an extended child key at the given path relative to the current key
/// </summary>
/// <param name="path">HD key path</param>
/// <returns>Derived extended child key</returns>
public HDKey Derive(HDPath path)
{
if (path == null)
{
throw new ArgumentNullException(nameof(path));
}
if (!path.Any())
{
return(this);
}
using (Store.Unlock())
{
var prvKey = Store.Data;
var chainCode = _ChainCode;
foreach (var uind in path)
{
(prvKey, chainCode) = HD.GetChildPrivateKey(Curve, prvKey, chainCode, uind);
}
return(new(new(prvKey, Curve.Kind, true), chainCode));
}
}
/// <summary>
/// Converts the path string, formatted like m/44'/1729'/0/0', to the HDPath object
/// </summary>
/// <param name="path">HD key path string, formatted like m/44'/1729'/0/0'</param>
/// <param name="res">Successfully parsed HDPath</param>
/// <returns>True if the HDPath is parsed successfully, otherwise false</returns>
public static bool TryParse(string path, out HDPath res)
{
res = null;
if (path == null)
{
return(false);
}
path = path.TrimStart('m').Trim('/');
if (path.Length == 0)
{
res = new();
return(true);
}
var ss = path.Split('/');
var indexes = new uint[ss.Length];
for (int i = 0; i < ss.Length; i++)
{
if (!TryParseIndex(ss[i], out var ind))
{
return(false);
}
indexes[i] = ind;
}
res = new(indexes);
return(true);
}
/// <summary>
/// Derives an extended child key at the given index
/// </summary>
/// <param name="index">Index of the child key, starting from zero</param>
/// <param name="hardened">If true, hardened derivation will be performed</param>
/// <returns>Derived extended child key</returns>
public HDKey Derive(int index, bool hardened = false)
{
var uind = HDPath.GetIndex(index, hardened);
using (Store.Unlock())
{
var(prvKey, chainCode) = HD.GetChildPrivateKey(Curve, Store.Data, _ChainCode, uind);
return(new(new(prvKey, Curve.Kind, true), chainCode));
}
}
/// <summary> /// Derives an extended child key at the given path relative to the current key /// </summary> /// <param name="path">HD key path string, formatted like m/44'/1729'/0/0'</param> /// <returns>Derived extended child key</returns> public HDKey Derive(string path) => Derive(HDPath.Parse(path));