private async Task <TransactionResult> TakeSnapshot(Hash votingItemId, long snapshotNumber)
{
var input = new TakeSnapshotInput
{
VotingItemId = votingItemId,
SnapshotNumber = snapshotNumber
};
var transactionResult = (await VoteContractStub.TakeSnapshot.SendAsync(input)).TransactionResult;
return(transactionResult);
}
public override Empty TakeSnapshot(TakeSnapshotInput input)
{
var votingItem = AssertVotingItem(input.VotingItemId);
Assert(votingItem.Sponsor == Context.Sender, "Only sponsor can take snapshot.");
Assert(votingItem.CurrentSnapshotNumber - 1 <= votingItem.TotalSnapshotNumber,
"Current voting item already ended.");
// Update previous voting going information.
var previousVotingResultHash = GetVotingResultHash(input.VotingItemId, votingItem.CurrentSnapshotNumber);
var previousVotingResult = State.VotingResults[previousVotingResultHash];
previousVotingResult.SnapshotEndTimestamp = Context.CurrentBlockTime;
State.VotingResults[previousVotingResultHash] = previousVotingResult;
Assert(votingItem.CurrentSnapshotNumber == input.SnapshotNumber,
$"Can only take snapshot of current snapshot number: {votingItem.CurrentSnapshotNumber}, but {input.SnapshotNumber}");
var nextSnapshotNumber = input.SnapshotNumber.Add(1);
votingItem.CurrentSnapshotNumber = nextSnapshotNumber;
State.VotingItems[votingItem.VotingItemId] = votingItem;
// Initial next voting going information.
var currentVotingGoingHash = GetVotingResultHash(input.VotingItemId, nextSnapshotNumber);
State.VotingResults[currentVotingGoingHash] = new VotingResult
{
VotingItemId = input.VotingItemId,
SnapshotNumber = nextSnapshotNumber,
SnapshotStartTimestamp = Context.CurrentBlockTime,
VotersCount = previousVotingResult.VotersCount,
VotesAmount = previousVotingResult.VotesAmount
};
return(new Empty());
}
