1.9 KiB
1.9 KiB
End-Block
Two staking activities are intended to be processed in the application end-block.
- inform Tendermint of validator set changes
- process and set atom inflation
Validator Set Changes
The Tendermint validator set may be updated by state transitions that run at the end of every block. The Tendermint validator set may be changed by validators either being revoked due to inactivity/unexpected behaviour (covered in slashing) or changed in validator power. Determining which validator set changes must be made occurs during staking transactions (and slashing transactions) - during end-block the already accounted changes are applied and the changes cleared
EndBlock() ValidatorSetChanges
vsc = GetTendermintUpdates()
ClearTendermintUpdates()
return vsc
Inflation
The atom inflation rate is changed once per hour based on the current and historic bond ratio
processProvisions():
hrsPerYr = 8766 // as defined by a julian year of 365.25 days
time = BFTTime()
if time > pool.InflationLastTime + ProvisionTimeout
pool.InflationLastTime = time
pool.Inflation = nextInflation(hrsPerYr).Round(1000000000)
provisions = pool.Inflation * (pool.TotalSupply / hrsPerYr)
pool.LooseTokens += provisions
feePool += LooseTokens
setPool(pool)
nextInflation(hrsPerYr rational.Rat):
if pool.TotalSupply > 0
bondedRatio = pool.BondedPool / pool.TotalSupply
else
bondedRation = 0
inflationRateChangePerYear = (1 - bondedRatio / params.GoalBonded) * params.InflationRateChange
inflationRateChange = inflationRateChangePerYear / hrsPerYr
inflation = pool.Inflation + inflationRateChange
if inflation > params.InflationMax then inflation = params.InflationMax
if inflation < params.InflationMin then inflation = params.InflationMin
return inflation