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params.go
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params.go
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package types
import (
"fmt"
sdk "github.com/cosmos/cosmos-sdk/types"
paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
)
// Parameter store keys.
var (
KeyContractAddress = []byte("contract")
_ paramtypes.ParamSet = &Params{}
)
func ParamKeyTable() paramtypes.KeyTable {
return paramtypes.NewKeyTable().RegisterParamSet(&Params{})
}
func NewParams(contractAddress string) (Params, error) {
return Params{
ContractAddress: contractAddress,
}, nil
}
// default gamm module parameters.
func DefaultParams() Params {
return Params{
ContractAddress: "",
}
}
// validate params.
func (p Params) Validate() error {
if err := validateContractAddress(p.ContractAddress); err != nil {
return err
}
return nil
}
// Implements params.ParamSet.
func (p *Params) ParamSetPairs() paramtypes.ParamSetPairs {
return paramtypes.ParamSetPairs{
paramtypes.NewParamSetPair(KeyContractAddress, &p.ContractAddress, validateContractAddress),
}
}
func validateContractAddress(i interface{}) error {
v, ok := i.(string)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
// Empty strings are valid for unsetting the param
if v == "" {
return nil
}
// Checks that the contract address is valid
bech32, err := sdk.AccAddressFromBech32(v)
if err != nil {
return err
}
err = sdk.VerifyAddressFormat(bech32)
if err != nil {
return err
}
return nil
}