public async Task <Attribute> GetAttributeAsync(string address)
{
AttributeService ethAttribute = new AttributeService(Web3, AccountService.PrivateKey, address);
byte[] descriptionArr = await ethAttribute.DescriptionAsyncCall();
string description = Encoding.UTF8.GetString(descriptionArr, 0, descriptionArr.Length);
description = description.TrimEnd('\0');//remove null characters at the end of string
//Populating attribute object with values from the smart contract
Attribute attributeModel = new Attribute
{
Address = address,
Hash = await ethAttribute.HashAsyncCall(),
Location = await ethAttribute.LocationAsyncCall(),
Owner = await ethAttribute.OwnerAsyncCall(),
Description = description
};
//Fetch the content of the attribute
attributeModel.Content = _contentService.GetContent(attributeModel.Location, attributeModel.Hash);
//Fetching each certificate and adding them to the attribute
Dictionary <string, Certificate> certificates = await GetCertificatesAsync(attributeModel);
foreach (Certificate cert in certificates.Values)
{
//replace the OwningAttribute placeholder with a complete instance
cert.OwningAttribute = attributeModel;
attributeModel.AddCertificate(cert);
}
return(attributeModel);
}
public virtual async Task Setup()
{
//create some dummy attributes
Attribute firstname = new Attribute()
{
Location = "1",
Hash = "1",
Content = new StringContent("Olivier"),
Description = "firstname"
};
Certificate firstnameCert = new Certificate()
{
Hash = "hash",
Location = "location",
OwningAttribute = firstname,
Content = new StringContent("content"),
Owner = "0x123456778"
};
firstname.AddCertificate(firstnameCert);
Attribute lastname = new Attribute()
{
Location = "2",
Hash = "2",
Content = new StringContent("Brochu Dufour"),
Description = "lastname"
};
Certificate lastnameCert = new Certificate()
{
Hash = "hash2",
Location = "location2",
OwningAttribute = lastname,
Content = new StringContent("content"),
Owner = "0x123456778"
};
lastname.AddCertificate(lastnameCert);
Attribute age = new Attribute()
{
Location = "3",
Hash = "3",
Content = new IntContent(24),
Description = "age"
};
t = new ID();
t.AddAttribute(firstname);
t.AddAttribute(lastname);
t.AddAttribute(age);
IFile file = await FileSystem.Current.LocalStorage.CreateFileAsync("mydata.db", CreationCollisionOption.ReplaceExisting);
var path = file.Path;
Mapper = new IDMapper(path, new AttributeMapper(path, new ExternalElementMapper <Certificate>(path)));
Mapper2 = new IDMapper(path, new AttributeMapper(path, new ExternalElementMapper <Certificate>(path)));
}
