public IEnumerable <PollResult> CalculateResults(long pollId)
{
var poll = _dataAccessService.GetEcPoll(pollId, true, true);
Dictionary <byte[], PollResult> votes = new Dictionary <byte[], PollResult>(new Byte32EqualityComparer());
foreach (var candidate in poll.Candidates)
{
byte[] assetId = candidate.AssetId.HexStringToByteArray();
byte[] commitment = ConfidentialAssetsHelper.GetNonblindedAssetCommitment(assetId);
votes.Add(commitment, new PollResult
{
Candidate = _translatorsRepository.GetInstance <EcCandidateRecord, Candidate>().Translate(candidate),
Votes = 0
});
}
foreach (var vote in poll.PollSelections.Where(s => !string.IsNullOrEmpty(s.VoterBlindingFactor)))
{
byte[] ecCommitment = vote.EcCommitment.HexStringToByteArray();
byte[] ecBf = vote.EcBlindingFactor.HexStringToByteArray();
byte[] voterBf = vote.VoterBlindingFactor.HexStringToByteArray();
byte[] bf = ConfidentialAssetsHelper.SumScalars(ecBf, voterBf);
byte[] blindingPoint = ConfidentialAssetsHelper.GetPublicKey(bf);
byte[] commitment = ConfidentialAssetsHelper.SubCommitments(ecCommitment, blindingPoint);
if (votes.ContainsKey(commitment))
{
votes[commitment].Votes++;
}
}
return(votes.Select(d => d.Value));
}
public SurjectionProof CalculateEcCommitmentProof(long pollId, EcSurjectionProofRequest proofRequest)
{
if (proofRequest is null)
{
throw new ArgumentNullException(nameof(proofRequest));
}
string ecCommitment = proofRequest.EcCommitment.ToHexString();
var pollSelection = _dataAccessService.GetPollSelection(pollId, ecCommitment);
byte[] ecBf = pollSelection.EcBlindingFactor.HexStringToByteArray();
byte[] bf = ConfidentialAssetsHelper.SumScalars(ecBf, proofRequest.PartialBlindingFactor);
var sp = ConfidentialAssetsHelper.CreateSurjectionProof(proofRequest.EcCommitment, proofRequest.CandidateCommitments, proofRequest.Index, bf);
return(sp);
}