public void Stake(Address from, BigInteger stakeAmount)
{
Runtime.Expect(stakeAmount >= MinimumValidStake, "invalid amount");
Runtime.Expect(IsWitness(from), "witness failed");
var stakeBalances = new BalanceSheet(Nexus.StakingTokenSymbol);
var balance = stakeBalances.Get(this.Storage, from);
var currentStake = _stakes.Get <Address, EnergyAction>(from);
var newStake = stakeAmount + currentStake.totalAmount;
Runtime.Expect(balance >= stakeAmount, "not enough balance");
Runtime.Expect(stakeBalances.Subtract(this.Storage, from, stakeAmount), "balance subtract failed");
Runtime.Expect(stakeBalances.Add(this.Storage, Runtime.Chain.Address, stakeAmount), "balance add failed");
var entry = new EnergyAction()
{
unclaimedPartials = stakeAmount + GetLastAction(from).unclaimedPartials,
totalAmount = newStake,
timestamp = this.Runtime.Time,
};
_stakes.Set(from, entry);
var logEntry = new VotingLogEntry()
{
timestamp = this.Runtime.Time,
amount = stakeAmount
};
var votingLogbook = _voteHistory.Get <Address, StorageList>(from);
votingLogbook.Add(logEntry);
var masterAccountThreshold = GetMasterThreshold();
if (Runtime.Nexus.GenesisAddress != from && newStake >= masterAccountThreshold && !IsMaster(from))
{
var nextClaim = GetMasterClaimDate(2);
_mastersList.Add(new EnergyMaster()
{
address = from, claimDate = nextClaim
});
Runtime.Notify(EventKind.RolePromote, from, new RoleEventData()
{
role = "master", date = nextClaim
});
}
Runtime.Notify(EventKind.TokenStake, from, new TokenEventData()
{
chainAddress = Runtime.Chain.Address, symbol = Nexus.StakingTokenSymbol, value = stakeAmount
});
}
private BigInteger CalculateEntryVotingPower(VotingLogEntry entry, Timestamp currentTime)
{
BigInteger baseMultiplier = 100;
BigInteger votingMultiplier = baseMultiplier;
var diff = (currentTime - entry.timestamp) / 86400;
var votingBonus = diff < MaxVotingPowerBonus ? diff : MaxVotingPowerBonus;
votingMultiplier += DailyVotingBonus * votingBonus;
var votingPower = (entry.amount * votingMultiplier) / 100;
return(votingPower);
}
