/// <summary>
/// https://github.com/kac-/umint/blob/master/mint_test.go
/// </summary>
public void TestRoundtrip()
{
var set = new List <uint> {
471105047
};
set.ForEach(compact => {
var expected = Mint.BigToCompact(Mint.DiffToTarget(Mint.CompactToDiff(compact)));
bool isValid = compact == expected;
AssertThrow(isValid, "TestRoundtrip failed");
});
}
public static CheckStakeResult CheckStakeKernelHash(MintTemplate template, uint txTime,
ulong stakeModifier, uint stakeMinAge)
{
var retobj = new CheckStakeResult
{
Id = template.Id,
OfAddress = template.OfAddress,
StakeModifier = stakeModifier,
BlockFromTime = template.BlockFromTime,
PrevTxOffset = template.PrevTxOffset,
PrevTxTime = template.PrevTxTime,
PrevTxOutIndex = template.PrevTxOutIndex,
FutureTimestamp = txTime,
};
if (txTime < template.PrevTxTime)
{
// Transaction timestamp violation
return(retobj);
}
if (template.BlockFromTime + 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 = 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++;
}
new List <uint>
{
(uint)template.BlockFromTime, (uint)template.PrevTxOffset, (uint)template.PrevTxTime,
(uint)template.PrevTxOutIndex, (uint)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___
var lastindex = hashProofOfStake.Length - 1;
if ((hashProofOfStake[lastindex] & 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);
}