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Begin-Block

Minting parameters are recalculated and inflation paid at the beginning of each block.

NextInflationRate​

The target annual inflation rate is recalculated each block. The inflation is also subject to a rate change (positive or negative) depending on the distance from the desired ratio (85%). The maximum rate change possible is defined to be 10% per year, however the annual inflation is capped as between 5% and 10%.

NextInflationRate(params Params, bondedRatio sdk.Dec) (inflation sdk.Dec) {
    inflationRateChangePerYear = (1 - bondedRatio/params.GoalBonded) * params.InflationRateChange
    inflationRateChange = inflationRateChangePerYear/blocksPerYr

    // increase the new annual inflation for this next cycle
    inflation += inflationRateChange
    if inflation > params.InflationMax {
        inflation = params.InflationMax
    }
    if inflation < params.InflationMin {
        inflation = params.InflationMin
    }

    return inflation
}

NextAnnualProvisions​

Calculate the annual provisions based on current total supply and inflation rate. This parameter is calculated once per block.

NextAnnualProvisions(params Params, totalSupply sdk.Dec) (provisions sdk.Dec) {
    return Inflation * totalSupply

BlockProvision​

Calculate the provisions generated for each block based on current annual provisions. The provisions are then minted by the mint module's ModuleMinterAccount and then transferred to the auth's FeeCollector ModuleAccount.

BlockProvision(params Params) sdk.Coin {
    provisionAmt = AnnualProvisions/ params.BlocksPerYear
    return sdk.NewCoin(params.MintDenom, provisionAmt.Truncate())