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params.go
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params.go
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package types
import (
"fmt"
"strings"
"github.com/cosmos/cosmos-sdk/x/params"
)
// Parameter keys
var (
KeyMarkets = []byte("Markets")
DefaultMarkets = Markets{}
)
// Params params for pricefeed. Can be altered via governance
type Params struct {
Markets Markets `json:"markets" yaml:"markets"` // Array containing the markets supported by the pricefeed
}
// NewParams creates a new AssetParams object
func NewParams(markets Markets) Params {
return Params{
Markets: markets,
}
}
// DefaultParams default params for pricefeed
func DefaultParams() Params {
return NewParams(DefaultMarkets)
}
// ParamKeyTable Key declaration for parameters
func ParamKeyTable() params.KeyTable {
return params.NewKeyTable().RegisterParamSet(&Params{})
}
// ParamSetPairs implements the ParamSet interface and returns all the key/value pairs
// pairs of pricefeed module's parameters.
func (p *Params) ParamSetPairs() params.ParamSetPairs {
return params.ParamSetPairs{
{Key: KeyMarkets, Value: &p.Markets},
}
}
// String implements fmt.stringer
func (p Params) String() string {
out := "Params:\n"
for _, a := range p.Markets {
out += fmt.Sprintf("%s\n", a.String())
}
return strings.TrimSpace(out)
}
// Validate ensure that params have valid values
func (p Params) Validate() error {
// iterate over assets and verify them
for _, asset := range p.Markets {
if asset.MarketID == "" {
return fmt.Errorf("invalid market: %s. missing market ID", asset.String())
}
}
return nil
}