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minter.go
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minter.go
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package types
import (
"time"
sdk "github.com/cosmos/cosmos-sdk/types"
)
// NewMinter returns a new Minter object with the given annual provisions values
func NewMinter(annualProvisions sdk.Dec) Minter {
return Minter{
AnnualProvisions: annualProvisions,
}
}
// InitialMinter returns an initial Minter object
func InitialMinter() Minter {
return NewMinter(
sdk.NewDec(0),
)
}
// DefaultInitialMinter returns a default initial Minter object for a new chain
func DefaultInitialMinter() Minter {
return InitialMinter()
}
// validate minter
func ValidateMinter(minter Minter) error {
return nil
}
// NextAnnualProvisions returns the next annual provisions
func (m Minter) NextAnnualProvisions(blockTime time.Time, params Params) sdk.Dec {
if params.StartTime.After(blockTime) {
return sdk.ZeroDec()
}
return params.InitialAnnualProvisions.
Mul(params.ReductionFactor.Power(currentYear(blockTime, params.StartTime)))
}
// BlockProvision returns the provisions for a block based on the annual
// provisions rate.
func (m Minter) BlockProvision(params Params) sdk.Coin {
provisionAmt := m.AnnualProvisions.QuoInt(sdk.NewInt(int64(params.BlocksPerYear)))
return sdk.NewCoin(params.MintDenom, provisionAmt.TruncateInt())
}
func currentYear(blockTime time.Time, startTime time.Time) uint64 {
delta := blockTime.Sub(startTime)
year := sdk.NewInt(int64(delta)).QuoRaw(int64(365 * 24 * time.Hour))
return year.Uint64()
}