public void WriteAccount(StAccountIDFieldCode fieldCode, AccountId value)
{
WriteFieldId(StTypeCode.AccountID, (uint)fieldCode);
WriteLengthPrefix(20);
value.CopyTo(bufferWriter.GetSpan(20));
bufferWriter.Advance(20);
}
public static Hash256 CalculateId(AccountId account)
{
Span <byte> buffer = stackalloc byte[22];
System.Buffers.Binary.BinaryPrimitives.WriteUInt16BigEndian(buffer, 0x0061);
account.CopyTo(buffer.Slice(2));
return(CalculateId(buffer));
}
public static Hash256 CalculateId(AccountId account, uint ticketSequence)
{
Span <byte> buffer = stackalloc byte[2 + 20 + 4];
System.Buffers.Binary.BinaryPrimitives.WriteUInt16BigEndian(buffer, 0x0054);
account.CopyTo(buffer.Slice(2));
System.Buffers.Binary.BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(22), ticketSequence);
return(CalculateId(buffer));
}
public static Hash256 CalculateId(AccountId owner, AccountId preauthorized)
{
Span <byte> buffer = stackalloc byte[42];
System.Buffers.Binary.BinaryPrimitives.WriteUInt16BigEndian(buffer, 0x0070);
owner.CopyTo(buffer.Slice(2));
preauthorized.CopyTo(buffer.Slice(22));
return(CalculateId(buffer));
}
public static Hash256 CalculateId(AccountId source, AccountId destination, uint sequence)
{
Span <byte> buffer = stackalloc byte[46];
System.Buffers.Binary.BinaryPrimitives.WriteUInt16BigEndian(buffer, 0x0078);
source.CopyTo(buffer.Slice(2));
destination.CopyTo(buffer.Slice(22));
System.Buffers.Binary.BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(42), sequence);
return(CalculateId(buffer));
}
public static Hash256 CalculateId(AccountId low, AccountId high, CurrencyCode currencyCode)
{
Span <byte> buffer = stackalloc byte[62];
System.Buffers.Binary.BinaryPrimitives.WriteUInt16BigEndian(buffer, 0x0072);
low.CopyTo(buffer.Slice(2));
high.CopyTo(buffer.Slice(22));
currencyCode.CopyTo(buffer.Slice(42));
return(CalculateId(buffer));
}
public static Hash256 CalculateOfferId(CurrencyCode takerPaysCurrency, CurrencyCode takerGetsCurrency, AccountId takerPaysIssuer, AccountId takerGetsIssuer, ulong offers)
{
// The first page of an Offer Directory has a special ID: the higher 192 bits define the order book, and the remaining 64 bits define the exchange rate of the offers in that directory.
// (The ID is big-endian, so the book is in the more significant bits, which come first, and the quality is in the less significant bits which come last.)
// This provides a way to iterate through an order book from best offers to worst.Specifically: the first 192 bits are the first 192 bits of the SHA-512Half of the following values, concatenated in order:
//
//The Book Directory space key(0x0042)
//The 160-bit currency code from the TakerPaysCurrency
//The 160-bit currency code from the TakerGetsCurrency
//The AccountID from the TakerPaysIssuer
//The AccountID from the TakerGetsIssuer
//The lower 64 bits of an Offer Directory's ID represent the TakerPays amount divided by TakerGets amount from the offer(s) in that directory as a 64-bit number in the XRP Ledger's internal amount format.
//
Span <byte> buffer = stackalloc byte[38];
System.Buffers.Binary.BinaryPrimitives.WriteUInt16BigEndian(buffer, 0x0042);
takerPaysCurrency.CopyTo(buffer.Slice(2));
takerGetsCurrency.CopyTo(buffer.Slice(22));
takerPaysIssuer.CopyTo(buffer.Slice(42));
takerGetsIssuer.CopyTo(buffer.Slice(62));
Hash256 hash = CalculateId(buffer);
return(hash);
}
