public override byte[] Encode(object?arg, bool packed)
{
if (arg is Array input)
{
byte[][] encodedItems = EncodeSequence(input.Length, ElementTypes, input.Cast <object?>(), packed, 1);
encodedItems[0] = UInt256.Encode((BigInteger)input.Length, packed);
return(Bytes.Concat(encodedItems));
}
throw new AbiException(AbiEncodingExceptionMessage);
}
public override byte[] Encode(object arg, bool packed)
{
if (arg is BigRational input)
{
if (_denominator != input.Denominator)
{
throw new AbiException(AbiEncodingExceptionMessage);
}
return(UInt256.Encode(input.Numerator, packed));
}
throw new AbiException(AbiEncodingExceptionMessage);
}
public override byte[] Encode(object arg, bool packed)
{
if (arg is byte[] input)
{
int paddingSize = (1 + input.Length / PaddingMultiple) * PaddingMultiple;
byte[] lengthEncoded = UInt256.Encode(new BigInteger(input.Length), packed);
return(Bytes.Concat(lengthEncoded, packed ? input : input.PadRight(paddingSize)));
}
if (arg is string stringInput)
{
return(Encode(Encoding.ASCII.GetBytes(stringInput), packed));
}
throw new AbiException(AbiEncodingExceptionMessage);
}
public override byte[] Encode(object arg, bool packed)
{
if (arg is Array input)
{
byte[][] encodedItems = new byte[input.Length + 1][];
int i = 0;
encodedItems[i++] = UInt256.Encode((BigInteger)input.Length, packed);
foreach (object o in input)
{
encodedItems[i++] = _elementType.Encode(o, packed);
}
return(Bytes.Concat(encodedItems));
}
throw new AbiException(AbiEncodingExceptionMessage);
}
public override byte[] Encode(object arg, bool packed)
{
if (arg is Array input)
{
if (input.Length != Length)
{
throw new AbiException(AbiEncodingExceptionMessage);
}
if (_elementType.IsDynamic)
{
byte[][] encodedItems = new byte[Length * 2 - 1][];
BigInteger currentOffset = (Length - 1) * UInt256.LengthInBytes;
int i = 0;
foreach (object o in input)
{
encodedItems[Length + i - 1] = _elementType.Encode(o, packed);
if (i != 0)
{
encodedItems[i - 1] = UInt256.Encode(currentOffset, packed);
currentOffset += new BigInteger(encodedItems[Length + i - 1].Length);
}
i++;
}
return(Bytes.Concat(encodedItems));
}
else
{
byte[][] encodedItems = new byte[Length][];
int i = 0;
foreach (object o in input)
{
encodedItems[i++] = _elementType.Encode(o, packed);
}
return(Bytes.Concat(encodedItems));
}
}
throw new AbiException(AbiEncodingExceptionMessage);
}
internal static byte[][] EncodeSequence(int length, IEnumerable <AbiType> types, IEnumerable <object?> sequence, bool packed, int offset = 0)
{
List <byte[]> dynamicParts = new(length);
List <byte[]?> headerParts = new(length);
using IEnumerator <object?> sequenceEnumerator = sequence.GetEnumerator();
using IEnumerator <AbiType> typesEnumerator = types.GetEnumerator();
for (int i = 0; i < length; i++)
{
sequenceEnumerator.MoveNext();
typesEnumerator.MoveNext();
object? element = sequenceEnumerator.Current;
AbiType type = typesEnumerator.Current;
byte[] encoded = type.Encode(element, packed);
// encode each type
if (type.IsDynamic)
{
// offset placeholder, we cannot calculate offset before calculating all header parts
headerParts.Add(null);
dynamicParts.Add(encoded);
}
else
{
headerParts.Add(encoded);
}
}
// now lets calculate proper offset
BigInteger currentOffset = 0;
// offset of header
for (int i = 0; i < headerParts.Count; i++)
{
currentOffset += headerParts[i]?.Length ?? PaddingSize;
}
// offset dynamic parts, calculating the actual offset of each part
int dynamicPartsIndex = 0;
for (int i = 0; i < headerParts.Count; i++)
{
if (headerParts[i] is null)
{
headerParts[i] = UInt256.Encode(currentOffset, packed);
currentOffset += dynamicParts[dynamicPartsIndex++].Length;
}
}
byte[][] encodedParts = new byte[offset + headerParts.Count + dynamicParts.Count][];
for (int i = 0; i < headerParts.Count; i++)
{
encodedParts[offset + i] = headerParts[i] !;
}
for (int i = 0; i < dynamicParts.Count; i++)
{
encodedParts[offset + headerParts.Count + i] = dynamicParts[i];
}
return(encodedParts);
}
