public PossibleStake(ulong units, CheckStakeResult result)
{
this.ID = result.Id;
this.Uxto = result.Id.Substring(2, 64);
this.Vout = int.Parse(result.Id.Substring(67));
this.Address = result.OfAddress;
this.StakeDate = ConvertFromUnixTimestamp(result.FutureTimestamp);
this.MaxDifficulty = result.minimumDifficulty;
this.StakeModifier = result.StakeModifier;
this.StakeModifierHex = result.StakeModifierHex;
this.BlockFromTime = result.BlockFromTime;
this.PrevTxOffset = result.PrevTxOffset;
this.PrevTxTime = result.PrevTxTime;
this.PrevTxOutIndex = result.PrevTxOutIndex;
this.FutureTimestamp = result.FutureTimestamp;
this.NewValueAtFutureTimestamp = CalcNewUnits(result.BlockFromTime, result.FutureTimestamp, units);
}
public static CheckStakeResult CheckStakeKernelHash(MintTemplate template, UInt32 txTime, UInt64 stakeModifier)
{
var retobj = new CheckStakeResult
{
Id = template.Id,
OfAddress = template.OfAddress,
txTime = txTime
};
if (txTime < template.PrevTxTime)
{
// Transaction timestamp violation
return(retobj);
}
if (template.BlockFromTime + PeercoinConstants.StakeMinAge > txTime)
{
// Min age requirement
return(retobj);
}
var bnTargetPerCoinDay = Mint.CompactToBig(template.Bits.Value);
long nTimeWeight = txTime - template.PrevTxTime;
if (nTimeWeight > PeercoinConstants.StakeMaxAge)
{
nTimeWeight = PeercoinConstants.StakeMaxAge;
}
long timeReduction = PeercoinConstants.StakeMinAge;
nTimeWeight -= timeReduction;
var t1 = new BigInteger(24 * 60 * 60);
var t2 = new BigInteger(PeercoinConstants.Coin);
var t3 = new BigInteger(template.PrevTxOutValue);
var t4 = new BigInteger(nTimeWeight);
BigInteger bnCoinDayWeight = (((t3 * t4) / t2)) / t1;
BigInteger targetInt = bnCoinDayWeight * (bnTargetPerCoinDay);
//byte[] array = new byte[28];
var buffer = new byte[28];
var bufferindex = 0;
byte[] arrStakemodifier = BitConverter.GetBytes(stakeModifier);
//put stakemodifier in buffer
for (var i = 0; i < 8; i++)
{
buffer[bufferindex] = arrStakemodifier[i];
bufferindex++;
}
//put other data in buffer
new List <UInt32> {
(UInt32)template.BlockFromTime, (UInt32)template.PrevTxOffset, (UInt32)template.PrevTxTime, (UInt32)template.PrevTxOutIndex, (UInt32)txTime
}
.ForEach(num => {
var dn = num;
for (var i = 0; i < 4; i++)
{
buffer[bufferindex] = (byte)(dn & 0xff);
dn >>= 8;
bufferindex++;
}
});
//no reverse so keep it in little endian
var hashProofOfStake = Mint.DoubleSha256(buffer.ToList()).ToArray(); //keep it in little-endian .Reverse().ToArray();
//add zero to last in array to make it unsigned:
// https://docs.microsoft.com/en-us/dotnet/api/system.numerics.biginteger.-ctor?view=netframework-4.5.2#System_Numerics_BigInteger__ctor_System_Byte___
if ((hashProofOfStake[hashProofOfStake.Length - 1] & 0x80) > 0)
{
byte[] temp = new byte[hashProofOfStake.Length];
Array.Copy(hashProofOfStake, temp, hashProofOfStake.Length);
hashProofOfStake = new byte[temp.Length + 1];
Array.Copy(temp, hashProofOfStake, temp.Length);
}
var hashProofOfStakeInt = new BigInteger(hashProofOfStake);
if (hashProofOfStakeInt > targetInt)
{
return(retobj);
}
//yeah, below target!
retobj.minTarget = (hashProofOfStakeInt / bnCoinDayWeight) - new BigInteger(1);
retobj.success = true;
retobj.hash = hashProofOfStake;
retobj.Id = template.Id;
var comp = Mint.IncCompact(
Mint.BigToCompact(retobj.minTarget)
);
retobj.minimumDifficulty = Mint.CompactToDiff(comp);
return(retobj);
}
