102 lines
3.2 KiB
Go
102 lines
3.2 KiB
Go
package types
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import (
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"fmt"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/x/params"
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)
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// Parameter store keys
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var (
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KeyMintDenom = []byte("MintDenom")
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KeyInflationRateChange = []byte("InflationRateChange")
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KeyInflationMax = []byte("InflationMax")
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KeyInflationMin = []byte("InflationMin")
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KeyGoalBonded = []byte("GoalBonded")
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KeyBlocksPerYear = []byte("BlocksPerYear")
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)
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// mint parameters
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type Params struct {
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MintDenom string `json:"mint_denom"` // type of coin to mint
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InflationRateChange sdk.Dec `json:"inflation_rate_change"` // maximum annual change in inflation rate
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InflationMax sdk.Dec `json:"inflation_max"` // maximum inflation rate
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InflationMin sdk.Dec `json:"inflation_min"` // minimum inflation rate
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GoalBonded sdk.Dec `json:"goal_bonded"` // goal of percent bonded atoms
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BlocksPerYear uint64 `json:"blocks_per_year"` // expected blocks per year
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}
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// ParamTable for minting module.
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func ParamKeyTable() params.KeyTable {
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return params.NewKeyTable().RegisterParamSet(&Params{})
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}
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func NewParams(mintDenom string, inflationRateChange, inflationMax,
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inflationMin, goalBonded sdk.Dec, blocksPerYear uint64) Params {
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return Params{
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MintDenom: mintDenom,
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InflationRateChange: inflationRateChange,
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InflationMax: inflationMax,
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InflationMin: inflationMin,
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GoalBonded: goalBonded,
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BlocksPerYear: blocksPerYear,
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}
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}
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// default minting module parameters
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func DefaultParams() Params {
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return Params{
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MintDenom: sdk.DefaultBondDenom,
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InflationRateChange: sdk.NewDecWithPrec(13, 2),
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InflationMax: sdk.NewDecWithPrec(20, 2),
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InflationMin: sdk.NewDecWithPrec(7, 2),
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GoalBonded: sdk.NewDecWithPrec(67, 2),
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BlocksPerYear: uint64(60 * 60 * 8766 / 5), // assuming 5 second block times
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}
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}
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// validate params
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func ValidateParams(params Params) error {
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if params.GoalBonded.LT(sdk.ZeroDec()) {
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return fmt.Errorf("mint parameter GoalBonded should be positive, is %s ", params.GoalBonded.String())
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}
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if params.GoalBonded.GT(sdk.OneDec()) {
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return fmt.Errorf("mint parameter GoalBonded must be <= 1, is %s", params.GoalBonded.String())
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}
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if params.InflationMax.LT(params.InflationMin) {
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return fmt.Errorf("mint parameter Max inflation must be greater than or equal to min inflation")
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}
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if params.MintDenom == "" {
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return fmt.Errorf("mint parameter MintDenom can't be an empty string")
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}
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return nil
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}
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func (p Params) String() string {
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return fmt.Sprintf(`Minting Params:
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Mint Denom: %s
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Inflation Rate Change: %s
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Inflation Max: %s
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Inflation Min: %s
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Goal Bonded: %s
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Blocks Per Year: %d
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`,
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p.MintDenom, p.InflationRateChange, p.InflationMax,
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p.InflationMin, p.GoalBonded, p.BlocksPerYear,
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)
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}
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// Implements params.ParamSet
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func (p *Params) ParamSetPairs() params.ParamSetPairs {
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return params.ParamSetPairs{
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{KeyMintDenom, &p.MintDenom},
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{KeyInflationRateChange, &p.InflationRateChange},
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{KeyInflationMax, &p.InflationMax},
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{KeyInflationMin, &p.InflationMin},
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{KeyGoalBonded, &p.GoalBonded},
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{KeyBlocksPerYear, &p.BlocksPerYear},
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}
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}
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