public BlockHeader?Decode(ref Rlp.ValueDecoderContext decoderContext,
RlpBehaviors rlpBehaviors = RlpBehaviors.None)
{
if (decoderContext.IsNextItemNull())
{
return(null);
}
var headerRlp = decoderContext.PeekNextItem();
int headerSequenceLength = decoderContext.ReadSequenceLength();
int headerCheck = decoderContext.Position + headerSequenceLength;
Keccak? parentHash = decoderContext.DecodeKeccak();
Keccak? unclesHash = decoderContext.DecodeKeccak();
Address?beneficiary = decoderContext.DecodeAddress();
Keccak? stateRoot = decoderContext.DecodeKeccak();
Keccak? transactionsRoot = decoderContext.DecodeKeccak();
Keccak? receiptsRoot = decoderContext.DecodeKeccak();
Bloom? bloom = decoderContext.DecodeBloom();
UInt256 difficulty = decoderContext.DecodeUInt256();
long number = decoderContext.DecodeLong();
long gasLimit = decoderContext.DecodeLong();
long gasUsed = decoderContext.DecodeLong();
UInt256 timestamp = decoderContext.DecodeUInt256();
byte[]? extraData = decoderContext.DecodeByteArray();
BlockHeader blockHeader = new(
parentHash,
unclesHash,
beneficiary,
difficulty,
number,
gasLimit,
timestamp,
extraData)
{
StateRoot = stateRoot,
TxRoot = transactionsRoot,
ReceiptsRoot = receiptsRoot,
Bloom = bloom,
GasUsed = gasUsed,
Hash = Keccak.Compute(headerRlp)
};
if (decoderContext.PeekPrefixAndContentLength().ContentLength == Keccak.Size)
{
blockHeader.MixHash = decoderContext.DecodeKeccak();
blockHeader.Nonce = (ulong)decoderContext.DecodeUBigInt();
}
else
{
blockHeader.AuRaStep = (long)decoderContext.DecodeUInt256();
blockHeader.AuRaSignature = decoderContext.DecodeByteArray();
}
if (blockHeader.Number >= Eip1559TransitionBlock)
{
blockHeader.BaseFeePerGas = decoderContext.DecodeUInt256();
}
if ((rlpBehaviors & RlpBehaviors.AllowExtraData) != RlpBehaviors.AllowExtraData)
{
decoderContext.Check(headerCheck);
}
return(blockHeader);
}
public Transaction Decode(ref Rlp.ValueDecoderContext decoderContext, RlpBehaviors rlpBehaviors = RlpBehaviors.None)
{
if (decoderContext.IsNextItemNull())
{
decoderContext.ReadByte();
return(null);
}
var transactionSequence = decoderContext.PeekNextItem();
int transactionLength = decoderContext.ReadSequenceLength();
int lastCheck = decoderContext.Position + transactionLength;
Transaction transaction = new Transaction();
transaction.Nonce = decoderContext.DecodeUInt256();
transaction.GasPrice = decoderContext.DecodeUInt256();
transaction.GasLimit = decoderContext.DecodeLong();
transaction.To = decoderContext.DecodeAddress();
transaction.Value = decoderContext.DecodeUInt256();
if (transaction.To == null)
{
transaction.Init = decoderContext.DecodeByteArray();
}
else
{
transaction.Data = decoderContext.DecodeByteArray();
}
if (decoderContext.Position < lastCheck)
{
Span <byte> vBytes = decoderContext.DecodeByteArraySpan();
Span <byte> rBytes = decoderContext.DecodeByteArraySpan();
Span <byte> sBytes = decoderContext.DecodeByteArraySpan();
bool allowUnsigned = (rlpBehaviors & RlpBehaviors.AllowUnsigned) == RlpBehaviors.AllowUnsigned;
bool isSignatureOk = true;
string signatureError = null;
if (vBytes == null || rBytes == null || sBytes == null)
{
isSignatureOk = false;
signatureError = "VRS null when decoding Transaction";
}
else if (vBytes.Length == 0 || rBytes.Length == 0 || sBytes.Length == 0)
{
isSignatureOk = false;
signatureError = "VRS is 0 length when decoding Transaction";
}
else if (vBytes[0] == 0 || rBytes[0] == 0 || sBytes[0] == 0)
{
isSignatureOk = false;
signatureError = "VRS starting with 0";
}
else if (rBytes.Length > 32 || sBytes.Length > 32)
{
isSignatureOk = false;
signatureError = "R and S lengths expected to be less or equal 32";
}
else if (rBytes.SequenceEqual(Bytes.Zero32) && sBytes.SequenceEqual(Bytes.Zero32))
{
isSignatureOk = false;
signatureError = "Both 'r' and 's' are zero when decoding a transaction.";
}
if (isSignatureOk)
{
int v = vBytes.ReadEthInt32();
Signature signature = new Signature(rBytes, sBytes, v);
transaction.Signature = signature;
transaction.Hash = Keccak.Compute(transactionSequence);
}
else
{
if (!allowUnsigned)
{
throw new RlpException(signatureError);
}
}
}
if ((rlpBehaviors & RlpBehaviors.AllowExtraData) != RlpBehaviors.AllowExtraData)
{
decoderContext.Check(lastCheck);
}
return(transaction);
}