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params.go
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params.go
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package types
import (
"fmt"
paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
)
// Parameter keys
var (
KeySupportedDenoms = []byte("SupportedDenoms")
DefaultSupportedDenoms = []string{}
)
// NewParams creates a new Params object
func NewParams(supportedDenoms []string) Params {
return Params{
SupportedDenoms: supportedDenoms,
}
}
// DefaultParams default params for savings
func DefaultParams() Params {
return NewParams(DefaultSupportedDenoms)
}
// ParamKeyTable Key declaration for parameters
func ParamKeyTable() paramtypes.KeyTable {
return paramtypes.NewKeyTable().RegisterParamSet(&Params{})
}
// ParamSetPairs implements the ParamSet interface and returns all the key/value pairs
// pairs of savings module's parameters.
func (p *Params) ParamSetPairs() paramtypes.ParamSetPairs {
return paramtypes.ParamSetPairs{
paramtypes.NewParamSetPair(KeySupportedDenoms, &p.SupportedDenoms, validateSupportedDenoms),
}
}
// Validate ensure that params have valid values
func (p Params) Validate() error {
return validateSupportedDenoms(p.SupportedDenoms)
}
func validateSupportedDenoms(i interface{}) error {
supportedDenoms, ok := i.([]string)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
seenDenoms := make(map[string]bool)
for _, denom := range supportedDenoms {
if seenDenoms[denom] {
return fmt.Errorf("duplicated denom %s", denom)
}
seenDenoms[denom] = true
}
return nil
}