public byte[] SignMessageByServiceKey(byte[] data, int chain, uint index)
{
return(BitcoinBasedCurrency
.CreateExtKeyFromSeed(Seed)
.Derive(new KeyPath(path: $"m/{ServicePurpose}'/0'/0'/{chain}/{index}"))
.SignMessage(data));
}
public byte[] GetServicePublicKey(uint index)
{
var extKey = BitcoinBasedCurrency
.CreateExtKeyFromSeed(Seed)
.Derive(new KeyPath(path: $"m/{ServicePurpose}'/0'/0'/0/{index}"));
extKey.GetPublicKey(out var publicKey);
return(publicKey);
}
public byte[] SignMessageByServiceKey(byte[] data, int chain, uint index)
{
using var masterKey = BitcoinBasedCurrency
.CreateExtKeyFromSeed(Seed);
using var derivedKey = masterKey
.Derive(new KeyPath(path: $"m/{ServicePurpose}'/0'/0'/{chain}/{index}"));
return(derivedKey.SignMessage(data));
}
public SecureBytes GetServicePublicKey(uint index)
{
using var masterKey = BitcoinBasedCurrency
.CreateExtKeyFromSeed(Seed);
using var extKey = masterKey
.Derive(new KeyPath(path: $"m/{ServicePurpose}'/0'/0'/0/{index}"));
return(extKey.GetPublicKey());
}
public byte[] GetDeterministicSecret(Currency currency, DateTime timeStamp)
{
var utcTimeStamp = timeStamp.ToUniversalTime();
var daysIndex = (int)(utcTimeStamp.Date - DateTime.MinValue).TotalDays;
var secondsIndex = utcTimeStamp.Hour * 60 * 60 + utcTimeStamp.Minute * 60 + utcTimeStamp.Second;
var msIndex = utcTimeStamp.Millisecond;
using var masterKey = BitcoinBasedCurrency
.CreateExtKeyFromSeed(Seed);
using var extKey = masterKey
.Derive(new KeyPath(path: $"m/{ServicePurpose}'/{currency.Bip44Code}'/0'/{daysIndex}/{secondsIndex}/{msIndex}"));
using var securePublicKey = extKey.GetPublicKey();
using var publicKey = securePublicKey.ToUnsecuredBytes();
return(Sha512.Compute(publicKey));
}