NBip32Fast

High perfomance BIP-32 HD key derivation library for .NET 8

Usage

Basic

var secp256k1Key = Secp256K1.Secp256K1HdKey.Instance.DerivePath("m/44'/0'/0'/0/0", seed).Key;
var nistP256Key = NistP256.NistP256HdKey.Instance.DerivePath("m/44'/0'/0'/0/0", seed).Key;
var ed25519Key = Ed25519.Ed25519HdKey.Instance.DerivePath("m/44'/0'/0'/0'/0'", seed).Key;

Optimised

var master = Ed25519.Ed25519HdKey.Instance.DerivePath("m/44'/888'/0'/0'", seed);
var accounts = new List<byte[]>();

for (var i = 0u; i < 5u; i++)
{
    accounts.Add(Ed25519.Ed25519HdKey.Instance.GetPublic(Ed25519.Ed25519HdKey.Instance.Derive(master, new KeyPathElement(i, true)).Key));
}

Benchmarks

Intel Core i9-14900K, 1 CPU, 32 logical and 24 physical cores

SecP256K1

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Allocated	Alloc Ratio
NBip39FastKey	36.32 us	0.332 us	0.310 us	1.00	0.00	0.0610	-	2.04 KB	1.00
NBitcoinKey	409.24 us	3.232 us	2.865 us	11.26	0.09	0.4883	-	9.47 KB	4.64
NetezosKey	556.16 us	7.795 us	7.291 us	15.31	0.22	166.9922	0.9766	3083.32 KB	1,512.13

Ed25519

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Allocated	Alloc Ratio
NBip32FastKey	4.272 us	0.0255 us	0.0226 us	1.00	0.00	0.0839	1.59 KB	1.00
NetezosKey	5.404 us	0.0434 us	0.0362 us	1.26	0.01	0.3204	5.99 KB	3.76
P3HdKey	5.939 us	0.0783 us	0.1045 us	1.40	0.03	0.3433	6.33 KB	3.97

NistP256

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Allocated	Alloc Ratio
NBip39FastKey	158.3 us	1.02 us	2.37 us	1.00	0.00	-	-	1.93 KB	1.00
NetezosKey	1,324.4 us	25.79 us	40.91 us	8.37	0.29	373.0469	1.9531	6857.9 KB	3,553.89

Benchmark code

TODOs

• Ed25519 soft derivation scheme (used in Cardano)
• KeyPathTree for efficient computing (for multiple keypath merging and index depth)
• HDKey refactoring with public key lazy addition
• More testing