/// <summary>
/// We pay a high code quality tax for the performance optimization on RLP.
/// Adding more RLP decoders is costly (time wise) but the path taken saves a lot of allocations and GC.
/// Shall we consider code generation for this? We could potentially generate IL from attributes for each
/// RLP serializable item and keep it as a compiled call available at runtime.
/// It would be slightly slower but still much faster than what we would get from using dynamic serializers.
/// </summary>
public AccessList?Decode(RlpStream rlpStream, RlpBehaviors rlpBehaviors = RlpBehaviors.None)
{
if (rlpStream.IsNextItemNull())
{
rlpStream.ReadByte();
return(null);
}
int length = rlpStream.PeekNextRlpLength();
int check = rlpStream.Position + length;
rlpStream.SkipLength();
AccessListBuilder accessListBuilder = new();
while (rlpStream.Position < check)
{
rlpStream.SkipLength();
Address address = rlpStream.DecodeAddress();
if (address == null)
{
throw new RlpException("Invalid tx access list format - address is null");
}
accessListBuilder.AddAddress(address);
if (rlpStream.Position < check)
{
int storageCheck = rlpStream.Position + rlpStream.PeekNextRlpLength();
rlpStream.SkipLength();
while (rlpStream.Position < storageCheck)
{
UInt256 index = rlpStream.DecodeUInt256();
accessListBuilder.AddStorage(index);
}
}
}
if ((rlpBehaviors & RlpBehaviors.AllowExtraData) != RlpBehaviors.AllowExtraData)
{
rlpStream.Check(check);
}
return(accessListBuilder.ToAccessList());
}
