public override ActionResult QuitElection(Empty input)
{
var candidates = State.CandidatesField.Value;
Assert(candidates != null,
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidField, nameof(State.CandidatesField)));
var publicKey = Context.RecoverPublicKey().ToHex();
Assert(candidates != null && candidates.PublicKeys.Contains(publicKey),
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidOperation, "Not announced."));
Assert(candidates != null && candidates.RemoveCandidate(Context.RecoverPublicKey()),
ContractErrorCode.GetErrorMessage(ContractErrorCode.AttemptFailed,
"Failed to remove this public key from candidates list."));
State.CandidatesField.Value = candidates;
State.TokenContract.Unlock.Send(new UnlockInput
{
From = Context.Sender,
To = Context.Self,
Symbol = Context.Variables.NativeSymbol,
LockId = State.HistoryMap[publicKey.ToStringValue()].AnnouncementTransactionId,
Amount = State.LockTokenForElection.Value,
Usage = "Unlock and quit election."
});
return(new ActionResult {
Success = true
});
}
public override Empty InitialDPoSContract(InitialDPoSContractInput input)
{
Assert(!State.Initialized.Value,
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidOperation, "Already initialized."));
State.TokenContractSystemName.Value = input.TokenContractSystemName;
State.DividendContractSystemName.Value = input.DividendsContractSystemName;
State.LockTokenForElection.Value = input.LockTokenForElection;
State.Initialized.Value = true;
return(new Empty());
}
/// <summary>
/// Initial miners can set blockchain age manually.
/// For testing.
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public override Empty SetBlockchainAge(SInt64Value input)
{
Assert(TryToGetRoundInformation(1, out var firstRound),
ContractErrorCode.GetErrorMessage(ContractErrorCode.NotFound, "Failed to get first round information"));
Assert(firstRound.RealTimeMinersInformation.Keys.Contains(Context.RecoverPublicKey().ToHex()),
ContractErrorCode.GetErrorMessage(ContractErrorCode.NoPermission,
"No permission to change blockchain age."));
// Don't use `UpdateBlockchainAge` here. Because in testing, we can set blockchain age for free.
State.AgeField.Value = input.Value;
LogVerbose($"{Context.RecoverPublicKey().ToHex()} set blockchain age to {input.Value}");
return(new Empty());
}
public override Empty InitialConsensus(Round firstRound)
{
Assert(firstRound.RoundNumber == 1,
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidField, "Invalid round number."));
Assert(firstRound.RealTimeMinersInformation.Any(),
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidField, "No miner in input data."));
InitialSettings(firstRound);
Assert(TryToAddRoundInformation(firstRound),
ContractErrorCode.GetErrorMessage(ContractErrorCode.AttemptFailed, "Failed to add round information."));
State.BasicContractZero.Value = Context.GetZeroSmartContractAddress();
return(new Empty());
}
public override Empty ConfigStrategy(DPoSStrategyInput input)
{
Assert(!State.IsStrategyConfigured.Value,
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidOperation, "Already configured."));
State.IsBlockchainAgeSettable.Value = input.IsBlockchainAgeSettable;
State.IsTimeSlotSkippable.Value = input.IsTimeSlotSkippable;
State.IsVerbose.Value = input.IsVerbose;
State.IsStrategyConfigured.Value = true;
LogVerbose("Consensus log level: Verbose");
LogVerbose($"Is blockchain age settable: {input.IsBlockchainAgeSettable}");
LogVerbose($"Is time slot skippable: {input.IsTimeSlotSkippable}");
return(new Empty());
}
// ReSharper disable once PossibleNullReferenceException
public override ActionResult ReceiveDividendsByTransactionId(Hash input)
{
var txId = input;
var votingRecord = State.VotingRecordsMap[txId];
Assert(votingRecord != null,
ContractErrorCode.GetErrorMessage(ContractErrorCode.NotFound, "Voting record not found."));
Assert(votingRecord.From == Context.RecoverPublicKey().ToHex(),
ContractErrorCode.GetErrorMessage(ContractErrorCode.NoPermission,
"No permission to receive."));
State.DividendContract.TransferDividends.Send(
Dividend.VotingRecord.Parser.ParseFrom(votingRecord.ToByteString()));
return(new ActionResult {
Success = true
});
}
// ReSharper disable once PossibleNullReferenceException
public override ActionResult ReceiveAllDividends(Empty input)
{
var tickets = State.TicketsMap[Context.RecoverPublicKey().ToHex().ToStringValue()];
Assert(tickets != null,
ContractErrorCode.GetErrorMessage(ContractErrorCode.NotFound, "Tickets information not found."));
Assert(tickets.VoteToTransactions.Any(),
ContractErrorCode.GetErrorMessage(ContractErrorCode.NotFound, "Voting records not found."));
foreach (var transactionId in tickets.VoteToTransactions)
{
var votingRecord = State.VotingRecordsMap[transactionId];
Assert(votingRecord != null,
ContractErrorCode.GetErrorMessage(ContractErrorCode.NotFound, "Voting record not found."));
State.DividendContract.TransferDividends.Send(
Dividend.VotingRecord.Parser.ParseFrom(votingRecord.ToByteString()));
}
return(new ActionResult {
Success = true
});
}
// ReSharper disable PossibleNullReferenceException
public override Tickets WithdrawAll(Empty input)
{
var voterPublicKey = Context.RecoverPublicKey().ToHex();
var ticketsCount = State.TicketsCountField.Value;
var withdrawnAmount = 0L;
var candidatesVotesDict = new Dictionary <string, long>();
var tickets = State.TicketsMap[voterPublicKey.ToStringValue()];
Assert(tickets != null,
ContractErrorCode.GetErrorMessage(ContractErrorCode.NotFound, "Tickets information not found."));
foreach (var transactionId in tickets.VoteToTransactions)
{
var votingRecord = State.VotingRecordsMap[transactionId];
Assert(votingRecord != null,
ContractErrorCode.GetErrorMessage(ContractErrorCode.NotFound, "Voting record not found."));
if (votingRecord.UnlockAge > CurrentAge)
{
// Just check next one, no need to assert.
continue;
}
// Update voting record map.
TryToGetBlockchainStartTimestamp(out var blockchainStartTimestamp);
votingRecord.WithdrawTimestamp =
blockchainStartTimestamp.ToDateTime().AddMinutes(CurrentAge).ToTimestamp();
votingRecord.IsWithdrawn = true;
State.VotingRecordsMap[votingRecord.TransactionId] = votingRecord;
// Prepare data for updating tickets map.
withdrawnAmount += votingRecord.Count;
if (candidatesVotesDict.ContainsKey(votingRecord.To))
{
candidatesVotesDict[votingRecord.To] += votingRecord.Count;
}
else
{
candidatesVotesDict.Add(votingRecord.To, votingRecord.Count);
}
State.TokenContract.Unlock.Send(new UnlockInput
{
From = Context.Sender,
To = Context.Self,
Symbol = Context.Variables.NativeSymbol,
Amount = votingRecord.Count,
LockId = votingRecord.TransactionId,
Usage = $"Withdraw locked token of transaction {transactionId}: {votingRecord}"
});
State.DividendContract.SubWeights.Send(
new Dividend.WeightsInfo()
{
TermNumber = State.CurrentTermNumberField.Value,
Weights = votingRecord.Weight
});
}
ticketsCount -= withdrawnAmount;
State.TicketsCountField.Value = ticketsCount;
tickets.VotedTickets -= withdrawnAmount;
State.TicketsMap[voterPublicKey.ToStringValue()] = tickets;
foreach (var candidateVote in candidatesVotesDict)
{
var ticketsOfCandidate = State.TicketsMap[candidateVote.Key.ToStringValue()];
Assert(ticketsOfCandidate != null,
ContractErrorCode.GetErrorMessage(ContractErrorCode.NotFound,
$"Tickets information of {candidateVote.Key} not found."));
ticketsOfCandidate.ObtainedTickets -= candidateVote.Value;
State.TicketsMap[candidateVote.Key.ToStringValue()] = ticketsOfCandidate;
}
return(State.TicketsMap[voterPublicKey.ToStringValue()]);
}
// ReSharper disable once PossibleNullReferenceException
public override Tickets WithdrawByTransactionId(Hash input)
{
var txId = input;
var votingRecord = State.VotingRecordsMap[txId];
Assert(votingRecord != null,
ContractErrorCode.GetErrorMessage(ContractErrorCode.NotFound, "Voting record not found."));
Assert(!votingRecord.IsWithdrawn,
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidOperation,
"This voting record has already withdrawn."));
Assert(votingRecord.UnlockAge <= CurrentAge,
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidOperation,
"This voting record can't withdraw for now."));
Assert(votingRecord.From == Context.RecoverPublicKey().ToHex(),
ContractErrorCode.GetErrorMessage(ContractErrorCode.NoPermission,
"No permission to withdraw tickets of others."));
// Update voting record map.
TryToGetBlockchainStartTimestamp(out var blockchainStartTimestamp);
votingRecord.WithdrawTimestamp =
blockchainStartTimestamp.ToDateTime().AddMinutes(CurrentAge).ToTimestamp();
votingRecord.IsWithdrawn = true;
State.VotingRecordsMap[txId] = votingRecord;
// Update total tickets count.
var ticketsCount = State.TicketsCountField.Value;
ticketsCount -= votingRecord.Count;
State.TicketsCountField.Value = ticketsCount;
// Update tickets number of this voter.
var ticketsOfVoter = State.TicketsMap[votingRecord.From.ToStringValue()];
if (ticketsOfVoter != null)
{
ticketsOfVoter.VotedTickets -= votingRecord.Count;
State.TicketsMap[votingRecord.From.ToStringValue()] = ticketsOfVoter;
}
// Update tickets number of related candidate.
var ticketsOfCandidate = State.TicketsMap[votingRecord.To.ToStringValue()];
if (ticketsOfCandidate != null)
{
ticketsOfCandidate.ObtainedTickets -= votingRecord.Count;
State.TicketsMap[votingRecord.To.ToStringValue()] = ticketsOfCandidate;
}
// Sub weight.
State.DividendContract.SubWeights.Send(
new Dividend.WeightsInfo()
{
TermNumber = State.CurrentTermNumberField.Value,
Weights = votingRecord.Weight
});
// Transfer token back to voter.
State.TokenContract.Unlock.Send(new UnlockInput
{
From = Context.Sender,
To = Context.Self,
Symbol = Context.Variables.NativeSymbol,
Amount = votingRecord.Count,
LockId = votingRecord.TransactionId,
Usage = $"Withdraw locked token of transaction {txId.ToHex()}: {votingRecord}"
});
return(State.TicketsMap[votingRecord.From.ToStringValue()]);
}
public override ActionResult AnnounceElection(Alias input)
{
if (State.DividendContract.Value == null)
{
State.DividendContract.Value =
State.BasicContractZero.GetContractAddressByName.Call(State.DividendContractSystemName.Value);
}
if (State.TokenContract.Value == null)
{
State.TokenContract.Value =
State.BasicContractZero.GetContractAddressByName.Call(State.TokenContractSystemName.Value);
}
var alias = input.Value;
var publicKey = Context.RecoverPublicKey().ToHex();
// A voter cannot join the election before all his voting record expired.
var tickets = State.TicketsMap[publicKey.ToStringValue()];
if (tickets != null)
{
foreach (var voteToTransaction in tickets.VoteToTransactions)
{
var votingRecord = State.VotingRecordsMap[voteToTransaction];
if (votingRecord != null)
{
Assert(votingRecord.IsWithdrawn,
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidOperation,
"Voter can't announce election."));
}
}
}
var candidates = State.CandidatesField.Value;
if (candidates != null)
{
Assert(!candidates.PublicKeys.Contains(publicKey),
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidOperation,
"Already announced election."));
candidates.AddCandidate(Context.RecoverPublicKey());
}
else
{
candidates = new Candidates
{
PublicKeys = { publicKey },
Addresses = { Address.FromPublicKey(Context.RecoverPublicKey()) }
};
}
State.CandidatesField.Value = candidates;
if (alias == "" || alias.Length > DPoSContractConsts.AliasLimit)
{
alias = publicKey.Substring(0, DPoSContractConsts.AliasLimit);
}
var publicKeyOfThisAlias = State.AliasesLookupMap[alias.ToStringValue()];
if (publicKeyOfThisAlias != null &&
publicKey == publicKeyOfThisAlias.Value)
{
return(new ActionResult {
Success = true
});
}
State.AliasesLookupMap[alias.ToStringValue()] = publicKey.ToStringValue();
State.AliasesMap[publicKey.ToStringValue()] = alias.ToStringValue();
// Add this alias to history information of this candidate.
var candidateHistoryInformation = State.HistoryMap[publicKey.ToStringValue()];
if (candidateHistoryInformation != null)
{
if (!candidateHistoryInformation.Aliases.Contains(alias))
{
candidateHistoryInformation.Aliases.Add(alias);
candidateHistoryInformation.CurrentAlias = alias;
}
candidateHistoryInformation.AnnouncementTransactionId = Context.TransactionId;
State.HistoryMap[publicKey.ToStringValue()] = candidateHistoryInformation;
}
else
{
State.HistoryMap[publicKey.ToStringValue()] = new CandidateInHistory
{
CurrentAlias = alias,
AnnouncementTransactionId = Context.TransactionId
};
}
State.TokenContract.Lock.Send(new LockInput()
{
From = Context.Sender,
To = Context.Self,
Symbol = Context.Variables.NativeSymbol,
Amount = State.LockTokenForElection.Value,
LockId = Context.TransactionId,
Usage = "Lock for announcing election."
});
return(new ActionResult {
Success = true
});
}
public override Hash Vote(VoteInput input)
{
var candidatePublicKey = input.CandidatePublicKey;
var amount = input.Amount;
var lockTime = input.LockTime;
Assert(lockTime.InRange(90, 1095),
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidOperation, "Lock days is illegal."));
// Cannot vote to non-candidate.
var candidates = State.CandidatesField.Value;
Assert(candidates != null, ContractErrorCode.GetErrorMessage(ContractErrorCode.NotFound, "No candidate."));
Assert(candidates != null && candidates.PublicKeys.Contains(candidatePublicKey),
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidOperation,
"Target didn't announce election."));
var voterPublicKey = Context.RecoverPublicKey().ToHex();
// A candidate cannot vote to anybody.
Assert(candidates != null && !candidates.PublicKeys.Contains(voterPublicKey),
ContractErrorCode.GetErrorMessage(ContractErrorCode.InvalidOperation, "Candidate can't vote."));
// Transfer the tokens to Consensus Contract address.
State.TokenContract.Lock.Send(new LockInput
{
From = Context.Sender,
To = Context.Self,
Symbol = Context.Variables.NativeSymbol,
Amount = amount,
LockId = Context.TransactionId,
Usage = "Lock for getting tickets."
});
var currentTermNumber = State.CurrentTermNumberField.Value;
var currentRoundNumber = State.CurrentRoundNumberField.Value;
// To make up a VotingRecord instance.
TryToGetBlockchainStartTimestamp(out var blockchainStartTimestamp);
var votingRecord = new VotingRecord
{
Count = amount,
From = voterPublicKey,
To = candidatePublicKey,
RoundNumber = currentRoundNumber,
TransactionId = Context.TransactionId,
VoteAge = CurrentAge,
UnlockAge = CurrentAge + (long)lockTime,
TermNumber = currentTermNumber,
VoteTimestamp = blockchainStartTimestamp.ToDateTime().AddMinutes(CurrentAge).ToTimestamp(),
UnlockTimestamp = blockchainStartTimestamp.ToDateTime().AddMinutes(CurrentAge + (long)lockTime)
.ToTimestamp()
};
votingRecord.LockDaysList.Add(lockTime);
// Add the transaction id of this voting record to the tickets information of the voter.
var tickets = State.TicketsMap[voterPublicKey.ToStringValue()];
if (tickets != null)
{
tickets.VoteToTransactions.Add(votingRecord.TransactionId);
}
else
{
tickets = new Tickets {
PublicKey = voterPublicKey
};
tickets.VoteToTransactions.Add(votingRecord.TransactionId);
}
tickets.VotedTickets += votingRecord.Count;
tickets.HistoryVotedTickets += votingRecord.Count;
State.TicketsMap[voterPublicKey.ToStringValue()] = tickets;
// Add the transaction id of this voting record to the tickets information of the candidate.
var candidateTickets = State.TicketsMap[candidatePublicKey.ToStringValue()];
if (candidateTickets != null)
{
candidateTickets.VoteFromTransactions.Add(votingRecord.TransactionId);
}
else
{
candidateTickets = new Tickets {
PublicKey = candidatePublicKey
};
candidateTickets.VoteFromTransactions.Add(votingRecord.TransactionId);
}
candidateTickets.ObtainedTickets += votingRecord.Count;
candidateTickets.HistoryObtainedTickets += votingRecord.Count;
State.TicketsMap[candidatePublicKey.ToStringValue()] = candidateTickets;
// Update the amount of votes (voting records of whole system).
State.VotesCountField.Value += 1;
// Update the amount of tickets.
State.TicketsCountField.Value += votingRecord.Count;
// Add this voting record to voting records map.
State.VotingRecordsMap[votingRecord.TransactionId] = votingRecord;
// Tell Dividends Contract to add weights for this voting record.
State.DividendContract.AddWeights.Send(new Dividend.WeightsInfo()
{
TermNumber = currentTermNumber + 1, Weights = votingRecord.Weight
});
Context.LogDebug(() => $"Weights of vote {votingRecord.TransactionId.ToHex()}: {votingRecord.Weight}");
return(Context.TransactionId);
}
public override DPoSHeaderInformation GetInformationToUpdateConsensus(DPoSTriggerInformation input)
{
// Some basic checks.
Assert(input.PublicKey.Any(), "Invalid public key.");
var publicKey = input.PublicKey;
var currentBlockTime = Context.CurrentBlockTime;
var behaviour = input.Behaviour;
Assert(TryToGetCurrentRoundInformation(out var currentRound),
ContractErrorCode.GetErrorMessage(ContractErrorCode.AttemptFailed,
"Failed to get current round information."));
switch (behaviour)
{
case DPoSBehaviour.UpdateValueWithoutPreviousInValue:
case DPoSBehaviour.UpdateValue:
Assert(input.RandomHash != null, "Random hash should not be null.");
var inValue = currentRound.CalculateInValue(input.RandomHash);
var outValue = Hash.FromMessage(inValue);
var signature = Hash.FromTwoHashes(outValue, input.RandomHash); // Just initial signature value.
var previousInValue = Hash.Empty; // Just initial previous in value.
if (TryToGetPreviousRoundInformation(out var previousRound) && !IsJustChangedTerm(out _))
{
signature = previousRound.CalculateSignature(inValue);
LogVerbose($"Previous random hash: {input.PreviousRandomHash.ToHex()}");
if (input.PreviousRandomHash != Hash.Empty)
{
// If PreviousRandomHash is Hash.Empty, it means the sender unable or unwilling to publish his previous in value.
previousInValue = previousRound.CalculateInValue(input.PreviousRandomHash);
}
}
var updatedRound = currentRound.ApplyNormalConsensusData(publicKey.ToHex(), previousInValue,
outValue, signature, currentBlockTime);
ShareAndRecoverInValue(updatedRound, previousRound, inValue, publicKey.ToHex());
// To publish Out Value.
return(new DPoSHeaderInformation
{
SenderPublicKey = publicKey,
Round = updatedRound,
Behaviour = behaviour,
});
case DPoSBehaviour.NextRound:
Assert(
GenerateNextRoundInformation(currentRound, currentBlockTime, out var nextRound),
"Failed to generate next round information.");
nextRound.RealTimeMinersInformation[publicKey.ToHex()].ProducedBlocks += 1;
Context.LogDebug(() => $"Mined blocks: {nextRound.GetMinedBlocks()}");
nextRound.ExtraBlockProducerOfPreviousRound = publicKey.ToHex();
return(new DPoSHeaderInformation
{
SenderPublicKey = publicKey,
Round = nextRound,
Behaviour = behaviour
});
case DPoSBehaviour.NextTerm:
var firstRoundOfNextTerm = GenerateFirstRoundOfNextTerm(publicKey.ToHex());
Assert(firstRoundOfNextTerm.RoundId != 0, "Failed to generate new round information.");
var information = new DPoSHeaderInformation
{
SenderPublicKey = publicKey,
Round = firstRoundOfNextTerm,
Behaviour = behaviour
};
return(information);
default:
return(new DPoSHeaderInformation());
}
}
public override Empty NextTerm(Round input)
{
// Count missed time slot of current round.
CountMissedTimeSlots();
Assert(TryToGetTermNumber(out var termNumber), "Term number not found.");
// Update current term number and current round number.
Assert(TryToUpdateTermNumber(input.TermNumber), "Failed to update term number.");
Assert(TryToUpdateRoundNumber(input.RoundNumber), "Failed to update round number.");
// Reset some fields of first two rounds of next term.
foreach (var minerInRound in input.RealTimeMinersInformation.Values)
{
minerInRound.MissedTimeSlots = 0;
minerInRound.ProducedBlocks = 0;
}
var senderPublicKey = Context.RecoverPublicKey().ToHex();
// Update produced block number of this node.
if (input.RealTimeMinersInformation.ContainsKey(senderPublicKey))
{
input.RealTimeMinersInformation[senderPublicKey].ProducedBlocks += 1;
}
else
{
if (TryToGetMinerHistoryInformation(senderPublicKey, out var historyInformation))
{
historyInformation.ProducedBlocks += 1;
}
else
{
historyInformation = new CandidateInHistory
{
PublicKey = senderPublicKey,
ProducedBlocks = 1,
CurrentAlias = senderPublicKey.Substring(0, DPoSContractConsts.AliasLimit)
};
}
AddOrUpdateMinerHistoryInformation(historyInformation);
}
// Update miners list.
Assert(SetMiners(input.RealTimeMinersInformation.Keys.ToList().ToMiners(input.TermNumber)),
ContractErrorCode.GetErrorMessage(ContractErrorCode.AttemptFailed, "Failed to update miners list."));
// Update term number lookup. (Using term number to get first round number of related term.)
State.TermToFirstRoundMap[input.TermNumber.ToInt64Value()] = input.RoundNumber.ToInt64Value();
// Update blockchain age of new term.
UpdateBlockchainAge(input.BlockchainAge);
// Update rounds information of next two rounds.
Assert(TryToAddRoundInformation(input), "Failed to add round information.");
if (State.DividendContract.Value != null)
{
State.DividendContract.Value =
State.BasicContractZero.GetContractAddressByName.Call(State.DividendContractSystemName.Value);
State.DividendContract.KeepWeights.Send(new SInt64Value {
Value = termNumber
});
var termInfo = new TermInfo
{
RoundNumber = input.RoundNumber - 1,
TermNumber = input.TermNumber - 1
};
Assert(SnapshotForTerm(termInfo).Success,
ContractErrorCode.GetErrorMessage(ContractErrorCode.AttemptFailed,
$"Failed to take snapshot of term {termInfo.TermNumber}"));
Assert(SnapshotForMiners(termInfo).Success,
ContractErrorCode.GetErrorMessage(ContractErrorCode.AttemptFailed,
$"Failed to take snapshot of miners of term {termInfo.TermNumber}"));
Assert(SendDividends(termInfo).Success,
ContractErrorCode.GetErrorMessage(ContractErrorCode.AttemptFailed,
$"Failed to send dividends of term {termInfo.TermNumber}"));
}
Context.LogDebug(() => $"Changing term number to {input.TermNumber}");
TryToFindLIB();
return(new Empty());
}