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params.go
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params.go
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package types
import (
"fmt"
"gopkg.in/yaml.v2"
sdk "github.com/cosmos/cosmos-sdk/types"
paramstypes "github.com/cosmos/cosmos-sdk/x/params/types"
core "github.com/classic-terra/core/v3/types"
)
// Parameter keys
var (
// Terra liquidity pool(usdr unit) made available per ${PoolRecoveryPeriod} (usdr unit)
KeyBasePool = []byte("BasePool")
// The period required to recover BasePool
KeyPoolRecoveryPeriod = []byte("PoolRecoveryPeriod")
// Min spread
KeyMinStabilitySpread = []byte("MinStabilitySpread")
)
// Default parameter values
var (
DefaultBasePool = sdk.NewDec(1000000 * core.MicroUnit) // 1000,000sdr = 1000,000,000,000usdr
DefaultPoolRecoveryPeriod = core.BlocksPerDay // 14,400
DefaultMinStabilitySpread = sdk.NewDecWithPrec(2, 2) // 2%
)
var _ paramstypes.ParamSet = &Params{}
// DefaultParams creates default market module parameters
func DefaultParams() Params {
return Params{
BasePool: DefaultBasePool,
PoolRecoveryPeriod: DefaultPoolRecoveryPeriod,
MinStabilitySpread: DefaultMinStabilitySpread,
}
}
// ParamKeyTable returns the parameter key table.
func ParamKeyTable() paramstypes.KeyTable {
return paramstypes.NewKeyTable().RegisterParamSet(&Params{})
}
// String implements fmt.Stringer interface
func (p Params) String() string {
out, _ := yaml.Marshal(p)
return string(out)
}
// ParamSetPairs implements the ParamSet interface and returns all the key/value pairs
// pairs of market module's parameters.
func (p *Params) ParamSetPairs() paramstypes.ParamSetPairs {
return paramstypes.ParamSetPairs{
paramstypes.NewParamSetPair(KeyBasePool, &p.BasePool, validateBasePool),
paramstypes.NewParamSetPair(KeyPoolRecoveryPeriod, &p.PoolRecoveryPeriod, validatePoolRecoveryPeriod),
paramstypes.NewParamSetPair(KeyMinStabilitySpread, &p.MinStabilitySpread, validateMinStabilitySpread),
}
}
// Validate a set of params
func (p Params) Validate() error {
if p.BasePool.IsNegative() {
return fmt.Errorf("mint base pool should be positive or zero, is %s", p.BasePool)
}
if p.PoolRecoveryPeriod == 0 {
return fmt.Errorf("pool recovery period should be positive, is %d", p.PoolRecoveryPeriod)
}
if p.MinStabilitySpread.IsNegative() || p.MinStabilitySpread.GT(sdk.OneDec()) {
return fmt.Errorf("market minimum stability spead should be a value between [0,1], is %s", p.MinStabilitySpread)
}
return nil
}
func validateBasePool(i interface{}) error {
v, ok := i.(sdk.Dec)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v.IsNegative() {
return fmt.Errorf("mint base pool must be positive or zero: %s", v)
}
return nil
}
func validatePoolRecoveryPeriod(i interface{}) error {
v, ok := i.(uint64)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v <= 0 {
return fmt.Errorf("pool recovery period must be positive: %d", v)
}
return nil
}
func validateMinStabilitySpread(i interface{}) error {
v, ok := i.(sdk.Dec)
if !ok {
return fmt.Errorf("invalid parameter type: %T", i)
}
if v.IsNegative() {
return fmt.Errorf("min spread must be positive or zero: %s", v)
}
if v.GT(sdk.OneDec()) {
return fmt.Errorf("min spread is too large: %s", v)
}
return nil
}