feat(x/mint): BeginBlocker

[fdymylja]

As defined in the ADR:

package mint

import "time"

const Year = 24 * time.Hour * 365

func BeginBlock(ctx sdk.Context) {
    lbi := GetLastBlockInfo(ctx)
    params := GetParams(ctx)
    timeElapsed := ctx.BlockTime().Sub(lbi.Time)
    if timeElapsed > params.MaxBlockDuration {
        timeElapsed = params.MaxBlockDuration
    }

    totalSupply := GetTotalStakingTokenSupply(ctx)
    totalBonded := GetTotalStakingTokenSupplyBonded(ctx)

    bondedRatio := totalBonded / totalSupply
    inflation := lbi.Inflation
    switch {
    case bondedRatio < params.MinBondedRatio:
        inflation += params.InflationChange * timeElapsed
    case bondedRatio > params.MaxBondedRatio:
        inflation -= params.InflationChange * timeElapsed
    }
	
	if inflation > params.MaxInflation {
		inflation = params.MaxInflation
    } else if inflation < params.MinInflation {
		inflation = params.MinInflation
    }
	

    lbi.Time = ctx.BlockTime()
    lbi.Inflation = inflation
    SetBlockInfo(ctx, lbi)

    totalCoinsToMint := (lbi.Inflation * totalSupply) * (timeElapsed/Year)
	
	for _, recp := range params.InflationRecipients {
		Mint(ctx, recp.Recipient, totalCoinsToMint * recp.Ratio)
    }
}

[spoo-bar]

Todo:

• // Track inflation rewards
  k.rewardsKeeper.TrackInflationRewards(ctx, dappRewards[0])
• // Update the minimum consensus fee
  k.rewardsKeeper.UpdateMinConsensusFee(ctx, dappRewards[0])
• Add tests to check of rewards minting which were removed from mintkbankkeeper