public static bool Verify(PublicKey publicKey, ReadOnlySpan <byte> signature, Hash256 channelId, XrpAmount amount)
{
Span <byte> buffer = stackalloc byte[44];
System.Buffers.Binary.BinaryPrimitives.WriteUInt32BigEndian(buffer, hpCLM);
channelId.CopyTo(buffer.Slice(4));
System.Buffers.Binary.BinaryPrimitives.WriteUInt64BigEndian(buffer.Slice(36), amount.Drops);
return(publicKey.Verify(buffer, signature));
}
public static Hash256 CalculatePage(Hash256 root, uint page)
{
Span <byte> buffer = stackalloc byte[38];
System.Buffers.Binary.BinaryPrimitives.WriteUInt16BigEndian(buffer, 0x0064);
root.CopyTo(buffer.Slice(2));
System.Buffers.Binary.BinaryPrimitives.WriteUInt32BigEndian(buffer.Slice(34), page);
return(CalculateId(buffer));
}
private const uint hpCLM = 0x434C4D00u; // CLM
public static byte[] Authorize(KeyPair keyPair, Hash256 channelId, XrpAmount amount)
{
Span <byte> buffer = stackalloc byte[44];
System.Buffers.Binary.BinaryPrimitives.WriteUInt32BigEndian(buffer, hpCLM);
channelId.CopyTo(buffer.Slice(4));
System.Buffers.Binary.BinaryPrimitives.WriteUInt64BigEndian(buffer.Slice(36), amount.Drops);
return(keyPair.Sign(buffer));
}
