internal override async ContractTask PostPersist(ApplicationEngine engine)
{
// Distribute VALT for committee
int m = engine.ProtocolSettings.CommitteeMembersCount;
int n = engine.ProtocolSettings.ValidatorsCount;
int index = (int)(engine.PersistingBlock.Index % (uint)m);
var valtPerBlock = GetValtPerBlock(engine.Snapshot);
var committee = GetCommitteeFromCache(engine.Snapshot);
var pubkey = committee.ElementAt(index).PublicKey;
var account = Contract.CreateSignatureRedeemScript(pubkey).ToScriptHash();
await VALT.Mint(engine, account, valtPerBlock *CommitteeRewardRatio / 100, false);
// Record the cumulative reward of the voters of committee
if (ShouldRefreshCommittee(engine.PersistingBlock.Index, m))
{
BigInteger voterRewardOfEachCommittee = valtPerBlock * VoterRewardRatio * 100000000L * m / (m + n) / 100; // Zoom in 100000000 times, and the final calculation should be divided 100000000L
for (index = 0; index < committee.Count; index++)
{
var member = committee.ElementAt(index);
var factor = index < n ? 2 : 1; // The `voter` rewards of validator will double than other committee's
if (member.Votes > 0)
{
BigInteger voterSumRewardPerVauth = factor * voterRewardOfEachCommittee / member.Votes;
StorageKey voterRewardKey = CreateStorageKey(Prefix_VoterRewardPerCommittee).Add(member.PublicKey).AddBigEndian(engine.PersistingBlock.Index + 1);
byte[] border = CreateStorageKey(Prefix_VoterRewardPerCommittee).Add(member.PublicKey).ToArray();
(_, var item) = engine.Snapshot.FindRange(voterRewardKey.ToArray(), border, SeekDirection.Backward).FirstOrDefault();
voterSumRewardPerVauth += (item ?? BigInteger.Zero);
engine.Snapshot.Add(voterRewardKey, new StorageItem(voterSumRewardPerVauth));
}
}
}
}
private async ContractTask DistributeValt(ApplicationEngine engine, UInt160 account, VauthAccountState state)
{
// PersistingBlock is null when running under the debugger
if (engine.PersistingBlock is null)
{
return;
}
BigInteger valt = CalculateBonus(engine.Snapshot, state.VoteTo, state.Balance, state.BalanceHeight, engine.PersistingBlock.Index);
state.BalanceHeight = engine.PersistingBlock.Index;
await VALT.Mint(engine, account, valt, true);
}