public async void VerifyEndorsement()
{
ObservableCollection <ListItemViewModel> identitiesInCommon = new ObservableCollection <ListItemViewModel>();
ListPageViewModel displayListOfCommonIdentities = new ListPageViewModel(identitiesInCommon, this);
// Do some endorsement
ScanQRCodeViewModel scanListOfEndorsedGuids = new ScanQRCodeViewModel(
(string endorsementsAsString) =>
{
List <string> endorsingIDs = JsonConvert.DeserializeObject <List <string> >(endorsementsAsString);
IEnumerable <Identity> intersectionOfIdentities = LocalIdentityStore.Instance.GetAllIdentities().Result.Where(x => endorsingIDs.Contains(x.IdentityGUID.ToString()));
foreach (var identity in intersectionOfIdentities)
{
identitiesInCommon.Add(new ListItemViewModel(identity, identity.FriendlyName, () =>
{
MessagePageViewModel verificationResult = new MessagePageViewModel(string.Empty, displayListOfCommonIdentities);
QRDisplayViewModel displaySelectedIdentityQR = new QRDisplayViewModel(
((Identity)identity).IdentityGUID.ToString(),
"Display selected identity");
ScanQRCodeViewModel scanEndorsement = new ScanQRCodeViewModel(
(string endorsement) =>
{
var endorsementIsValid = identity.IsValidEndorsement(Endorsement.GetFromJSONString(endorsement));
if (endorsementIsValid)
{
verificationResult.Message = "The endorsement is valid!";
verificationResult.MessageIcon = MessagePageViewModel.MessageIcons.Success;
}
else
{
verificationResult.Message = "The endorsement is NOT valid!";
verificationResult.MessageIcon = MessagePageViewModel.MessageIcons.Error;
}
},
verificationResult,
"Scan endorsement");
displaySelectedIdentityQR.PostDisplayComplete = scanEndorsement;
NavigationMaster.Instance.NavigateTo(displaySelectedIdentityQR);
}));
}
},
displayListOfCommonIdentities,
"Scan list of endorsements");
// Navigate back to main page
await NavigationMaster.Instance.NavigateTo(scanListOfEndorsedGuids);
}
public async Task AcceptEndorsement()
{
Endorsement endorsement = null;
KeyPair publicKey = null; // assigning here to make compiler happy
Guid guid;
Identity endorserIdentity = null;
var getFriendlyName = new InputPageViewModel(
new List <InputViewModel>()
{
new InputViewModel()
},
async(content) =>
{
endorserIdentity.FriendlyName = content.First().Content;
if (endorserIdentity.IsValidEndorsement(endorsement))
{
await LocalIdentityStore.Instance.StoreIdentity(endorserIdentity);
LocalIdentityStore.Instance.AcceptEndorsement(endorsement);
}
},
new MainPageViewModel());
var readEndorsement = new ScanQRCodeViewModel(
async(string result) =>
{
endorsement = Endorsement.GetFromJSONString(result);
endorserIdentity = await LocalIdentityStore.Instance.GetIdentity(guid);
if (endorserIdentity == null)
{
endorserIdentity = new Identity(guid);
}
endorserIdentity.KeyPairsAssertingOwnership.Add(publicKey);
},
getFriendlyName,
"Scan endorsement");
var readPublicKey = new ScanQRCodeViewModel((byte[] result) => { publicKey = new KeyPair(result); }, readEndorsement, "Scan Public Key");
var readGuid = new ScanQRCodeViewModel((string result) => { guid = Guid.Parse(result); }, readPublicKey, "Scan ID");
await NavigationMaster.Instance.NavigateTo(readGuid);
}