public void TargetHashBits_Adjust_OneSixthTime_Validate_HalfAdjustmentLimit()
{
var thb = HashBits.Create(6, 0xffffffffffffff);
var adjustedthb = thb.Adjust(1, 6, 50, HashBits.MinTarget);
Assert.AreEqual(6, adjustedthb.GetBitOffset());
Assert.AreEqual(0xaaaaaaaaaaaaaaUL, adjustedthb.GetFraction());
}
public void TargetHashBits_Adjust_SixTime_Validate_HalfAdjustmentLimit()
{
var thb = HashBits.Create(6, 0xffffffffffffff);
var adjustedthb = thb.Adjust(600, 100, 50, HashBits.MinTarget);
Assert.AreEqual(5, adjustedthb.GetBitOffset());
Assert.AreEqual(0xbfffffffffffffUL, adjustedthb.GetFraction());
}
public void TargetHashBits_Adjust_ThirthHalfTime_Validate_Offset()
{
var thb = HashBits.Create(5, 0xffffffffffffff);
var adjustedthb = thb.Adjust(3000, 2000, 10000, HashBits.MinTarget);
Assert.AreEqual(4, adjustedthb.GetBitOffset());
Assert.IsTrue(thb.GetFraction() > adjustedthb.GetFraction());
}
public void TargetHashBits_Adjust_OneSixthTime_Validate_OffsetAndFraction()
{
var thb = HashBits.Create(6, 0xffffffffffffff);
var adjustedthb = thb.Adjust(1, 6, 10000, HashBits.MinTarget);
Assert.AreEqual(8, adjustedthb.GetBitOffset());
Assert.IsTrue(thb.GetFraction() > adjustedthb.GetFraction());
}
public void TargetHashBits_Adjust_SameTime_Validate_OffsetAndFraction()
{
var thb = HashBits.Create(6, 0xffffffffffffff);
var adjustedthb = thb.Adjust(1, 1, 10000, HashBits.MinTarget);
Assert.AreEqual(6, adjustedthb.GetBitOffset());
Assert.AreEqual(thb.GetFraction(), adjustedthb.GetFraction());
}
public void TargetHashBits_Adjust_DoubleMinusTime_FullFraction_Validate_OffsetAndFraction()
{
var thb = HashBits.Create(2, 0xffffffffffffff);
var adjustedthb = thb.Adjust(1999, 1000, 10000, HashBits.MinTarget);
Assert.AreEqual(1, adjustedthb.GetBitOffset());
Assert.IsTrue(thb.GetFraction() > adjustedthb.GetFraction());
}
public void TargetHashBits_Adjust_SixTime_Validate_MinimumTarget()
{
var thb = HashBits.Create(6, 0xffffffffffffff);
var minTarget = HashBits.Create(0x0f, 0xffffffffffffff);
var adjustedthb = thb.Adjust(600, 100, 50, minTarget);
Assert.AreEqual(minTarget.GetBitOffset(), adjustedthb.GetBitOffset());
Assert.AreEqual(minTarget.GetFraction(), adjustedthb.GetFraction());
}
public void TargetHashBits_Adjust_HalfMinusTime_Validate_OffsetAndFraction()
{
var thb = HashBits.Create(6, 0xffffffffffffff);
var adjustedthb = thb.Adjust(99, 200, 10000, HashBits.MinTarget);
var hash = adjustedthb.ToHash().SerializeToJson();
Console.WriteLine($"o({adjustedthb.GetBitOffset()}),\tf(0x{adjustedthb.GetFraction():X16}),\th({hash})");
Assert.AreEqual(7, adjustedthb.GetBitOffset());
Assert.IsTrue(thb.GetFraction() > adjustedthb.GetFraction());
}
public void TargetHashBits_Adjust__Smoke_ConsoleOutput()
{
var target = 10;
var thb = HashBits.Create(100, 0xffffffffffffff);
//var thb = new TargetHashBits(100, 0x88888888888888);
for (int i = 1; i <= 40; i++)
{
var adjustedthb = thb.Adjust(i, target, 10000);
var hash = adjustedthb.ToHash().SerializeToJson();
Console.WriteLine($"{i}/{target}:\to({adjustedthb.GetBitOffset()}),\tf(0x{adjustedthb.GetFraction():X16}),\th({hash})");
}
}
public void TargetHashBits_ToHash_Offset200_Validate_Segments()
{
var thb = HashBits.Create(200, 0x123456789abcde);
var hash = thb.ToHash();
Assert.AreEqual(0x00, hash.Value[24]);
Assert.AreEqual(0x12, hash.Value[25]);
Assert.AreEqual(0x34, hash.Value[26]);
Assert.AreEqual(0x56, hash.Value[27]);
Assert.AreEqual(0x78, hash.Value[28]);
Assert.AreEqual(0x9a, hash.Value[29]);
Assert.AreEqual(0xbc, hash.Value[30]);
Assert.AreEqual(0xde, hash.Value[31]);
}
public void TargetHashBits_ToHash_Offset0_Validate_Segments()
{
var thb = HashBits.Create(0, 0x123456789abcde);
var hash = thb.ToHash();
Assert.AreEqual(0x12, hash.Value[0]);
Assert.AreEqual(0x34, hash.Value[1]);
Assert.AreEqual(0x56, hash.Value[2]);
Assert.AreEqual(0x78, hash.Value[3]);
Assert.AreEqual(0x9a, hash.Value[4]);
Assert.AreEqual(0xbc, hash.Value[5]);
Assert.AreEqual(0xde, hash.Value[6]);
Assert.AreEqual(0x00, hash.Value[7]);
}
public void TargetHashBits_ToHash_Offset193_Validate_Segments()
{
var thb = HashBits.Create(193, 0xffffffffffffff);
var hash = thb.ToHash();
Assert.AreEqual(0x00, hash.Value[23]);
Assert.AreEqual(0x7f, hash.Value[24]);
Assert.AreEqual(0xff, hash.Value[25]);
Assert.AreEqual(0xff, hash.Value[26]);
Assert.AreEqual(0xff, hash.Value[27]);
Assert.AreEqual(0xff, hash.Value[28]);
Assert.AreEqual(0xff, hash.Value[29]);
Assert.AreEqual(0xff, hash.Value[30]);
Assert.AreEqual(0x80, hash.Value[31]);
}
public void TargetHashBits_ToHash_Offset4_Validate_Segments()
{
var thb = HashBits.Create(4, 0xffffffffffffff);
var hash = thb.ToHash();
Assert.AreEqual(0x0f, hash.Value[0]);
Assert.AreEqual(0xff, hash.Value[1]);
Assert.AreEqual(0xff, hash.Value[2]);
Assert.AreEqual(0xff, hash.Value[3]);
Assert.AreEqual(0xff, hash.Value[4]);
Assert.AreEqual(0xff, hash.Value[5]);
Assert.AreEqual(0xff, hash.Value[6]);
Assert.AreEqual(0xf0, hash.Value[7]);
Assert.AreEqual(0x00, hash.Value[8]);
}
public void TargetHashBits_ToHash_Offset201_Validate_ArgumentException()
{
var thb = HashBits.Create(201, 0xffffffffffffff);
var hash = thb.ToHash();
//Checked only if TargetHashBits has no limit on offset
Assert.AreEqual(0x00, hash.Value[24]);
Assert.AreEqual(0x7f, hash.Value[25]);
Assert.AreEqual(0xff, hash.Value[26]);
Assert.AreEqual(0xff, hash.Value[27]);
Assert.AreEqual(0xff, hash.Value[28]);
Assert.AreEqual(0xff, hash.Value[29]);
Assert.AreEqual(0xff, hash.Value[30]);
Assert.AreEqual(0xff, hash.Value[31]);
//Assert.AreEqual(0x80, hash.Value[32]);//We loose this bits
}
private void AddTasks(int taskCount)
{
_feedback.Execute("AddTasks",
() =>
{
for (var i = 0; i < taskCount; i++)
{
var cancelationTokenSource = new CancellationTokenSource();
var task = new MinerTask(cancelationTokenSource);
var nounce = _nextNounce;
task.Start(cancellationToken =>
FindHashTarget(
HashBits.Create(HashBits.OffsetMax, nounce),
NounceStep,
cancellationToken));
_tasks.Enqueue(task);
_nextNounce += NounceStep;
}
},
() => $"{nameof(taskCount)}: {taskCount}");
}
public static HashBits Adjust(this HashBits @this, long currentTimeDelta, long targetTimeDelta, int adjustmentPercentLimit = Genesis.AdjustmentPercentLimit, HashBits minTarget = null)
{
minTarget = minTarget ?? Genesis.Target;
//Adjustment log
/*var coefficient = (decimal)targetTimeDelta / currentTimeDelta;
* Console.WriteLine($"@@@");
* Console.WriteLine($"@ Adjustment -> currentTimeDelta: {TimeSpan.FromTicks(currentTimeDelta)}, targetTimeDelta: {TimeSpan.FromTicks(targetTimeDelta)}, Expected coefficient: {coefficient}");*/
if (targetTimeDelta != currentTimeDelta)
{
int offsetAdjust = 0;
ulong fractionAdjust;
if (targetTimeDelta < currentTimeDelta)
{
var limit = targetTimeDelta + targetTimeDelta * adjustmentPercentLimit / 100; // X(1+A)
if (currentTimeDelta > limit)
{
currentTimeDelta = limit;
}
while (targetTimeDelta < currentTimeDelta)
{
targetTimeDelta <<= 1;
offsetAdjust -= 1;
}
// TODO: optimize using intermediate bit shifts instead of floating calculations
//Because fraction offset was moved above the target (by power of 2),
//reduce fraction itself with (1/2 < fractionMultiplyer < 1) to match the exact target
var fractionMultiplyer = (decimal)currentTimeDelta / targetTimeDelta;
//Because last byte of the fraction is reserved for offset, there will be a space for one bit shift
//so fraction can be normalized even if high bit goes away from fraction reduction
fractionAdjust = (ulong)((@this.GetFraction() << 1) * fractionMultiplyer);
offsetAdjust++;
}
else
{
var limit = targetTimeDelta * 100 / (100 + adjustmentPercentLimit); // X/(1+A)
if (currentTimeDelta < limit)
{
currentTimeDelta = limit;
}
while (currentTimeDelta < targetTimeDelta)
{
currentTimeDelta <<= 1;
offsetAdjust += 1;
}
// TODO: optimize using intermediate bit shifts instead of floating calculations
//Because fraction offset was moved below the target (by power of 2),
//increase fraction itself with (1 < fractionMultiplyer < 2) to match the exact target
var fractionMultiplyer = (decimal)currentTimeDelta / targetTimeDelta;
//Because last byte of the fraction is reserved for offset, there will be a space for one bit if necessary
fractionAdjust = (ulong)(@this.GetFraction() * fractionMultiplyer);
}
// In case fraction was increased Adjust(Normalize) fraction/offset to match their masks
if ((fractionAdjust & HashBits.OffsetMask) != 0)
{
fractionAdjust >>= 1;
offsetAdjust--;
}
var newOffset = @this.GetBitOffset() + offsetAdjust;
//Adjustment log
/*var currentCoefficient = ((decimal) GetFraction() / fractionAdjust) * (decimal)Math.Pow(2, -(GetBitOffset()- newOffset));
* Console.WriteLine($"@ Adjustment -> Current: {currentCoefficient} (o:{newOffset:x1}, f:{fractionAdjust:x16})");*/
if (newOffset < minTarget.GetBitOffset())
{
return(minTarget);
}
else if (newOffset > HashBits.OffsetMax)
{
return(HashBits.Create(HashBits.OffsetMax, fractionAdjust >> (newOffset - HashBits.OffsetMax)));
}
return(HashBits.Create((byte)newOffset, fractionAdjust));
}
return(@this);
}
