/
params.go
66 lines (53 loc) · 1.58 KB
/
params.go
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package types
import (
"fmt"
errorsmod "cosmossdk.io/errors"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
)
// DefaultParams returns default parameters
func DefaultParams() Params {
return Params{MinimumGasPrices: sdk.DecCoins(nil)}
}
// Validate performs basic validation.
func (p Params) Validate() error {
return validateMinimumGasPrices(p.MinimumGasPrices)
}
// this requires the fee non-negative
func validateMinimumGasPrices(i interface{}) error {
v, ok := i.(sdk.DecCoins)
if !ok {
return errorsmod.Wrapf(sdkerrors.ErrInvalidType, "type: %T, expected sdk.DecCoins", i)
}
dec := DecCoins(v)
return dec.Validate()
}
type DecCoins sdk.DecCoins
// Validate checks that the DecCoins are sorted, have nonnegtive amount, with a valid and unique
// denomination (i.e no duplicates). Otherwise, it returns an error.
func (coins DecCoins) Validate() error {
if len(coins) == 0 {
return nil
}
lowDenom := ""
seenDenoms := make(map[string]bool)
for i, coin := range coins {
if seenDenoms[coin.Denom] {
return fmt.Errorf("duplicate denomination %s", coin.Denom)
}
if err := sdk.ValidateDenom(coin.Denom); err != nil {
return err
}
// skip the denom order check for the first denom in the coins list
if i != 0 && coin.Denom <= lowDenom {
return fmt.Errorf("denomination %s is not sorted", coin.Denom)
}
if coin.IsNegative() {
return fmt.Errorf("coin %s amount is negative", coin.Amount)
}
// we compare each coin against the last denom
lowDenom = coin.Denom
seenDenoms[coin.Denom] = true
}
return nil
}