private static BigRational GetSquareRoot(BigRational b)
{
var s = b;
for (var i = 0; i < 18; i++)
{
b = (b + (s / b)) / BigRational.FromInt(2);
}
return(b);
}
// https://en.wikipedia.org/wiki/Chudnovsky_algorithm
private static BigRational CalculateValue(BigRational maxK)
{
var K = BigRational.FromDecimal(6m);
var M = BigRational.FromDecimal(1m);
var L = BigRational.FromDecimal(13591409m);
var X = BigRational.FromDecimal(1m);
var S = BigRational.FromDecimal(13591409m);
var sixteen = BigRational.FromInt(16);
var L_constant = BigRational.FromInt(545140134);
var X_constant = BigRational.FromDecimal(-262537412640768000M);
var twelve = BigRational.FromInt(12);
for (var k = BigRational.One; k < (maxK + BigRational.One); k += BigRational.One)
{
M = M * (BigRational.Pow(K, 3) - (K * sixteen)) / BigRational.Pow(k, 3);
L += L_constant;
X *= X_constant;
S += M * L / X;
K += twelve;
}
return(BigRational.FromDecimal(426880m) * GetSquareRoot(BigRational.FromDecimal(10005m)) / S);
}
public override (object, int) Decode(byte[] data, int position, bool packed)
{
(BigInteger nominator, int newPosition) = Int256.DecodeInt(data, position, packed);
BigRational rational = BigRational.FromBigInt(nominator) * BigRational.Reciprocal(BigRational.Pow(BigRational.FromInt(10), Precision));
return(rational, newPosition);
}
public void Test_ufixed(AbiEncodingStyle encodingStyle)
{
AbiUFixed type = AbiType.UFixed;
BigRational data = BigRational.FromBigInt(-123456789) * BigRational.Reciprocal(BigRational.Pow(BigRational.FromInt(10), type.Precision));
AbiSignature signature = new AbiSignature("abc", type);
byte[] encoded = _abiEncoder.Encode(encodingStyle, signature, data);
object[] arguments = _abiEncoder.Decode(encodingStyle, signature, encoded);
Assert.AreEqual(arguments[0], data);
}
