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keeper.go
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keeper.go
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package params
import (
"fmt"
"reflect"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/wire"
)
// Keeper manages global parameter store
type Keeper struct {
cdc *wire.Codec
key sdk.StoreKey
}
// NewKeeper constructs a new Keeper
func NewKeeper(cdc *wire.Codec, key sdk.StoreKey) Keeper {
return Keeper{
cdc: cdc,
key: key,
}
}
// InitKeeper constructs a new Keeper with initial parameters
func InitKeeper(ctx sdk.Context, cdc *wire.Codec, key sdk.StoreKey, params ...interface{}) Keeper {
if len(params)%2 != 0 {
panic("Odd params list length for InitKeeper")
}
k := NewKeeper(cdc, key)
for i := 0; i < len(params); i += 2 {
k.set(ctx, params[i].(string), params[i+1])
}
return k
}
// get automatically unmarshalls parameter to pointer
func (k Keeper) get(ctx sdk.Context, key string, ptr interface{}) error {
store := ctx.KVStore(k.key)
bz := store.Get([]byte(key))
return k.cdc.UnmarshalBinary(bz, ptr)
}
// getRaw returns raw byte slice
func (k Keeper) getRaw(ctx sdk.Context, key string) []byte {
store := ctx.KVStore(k.key)
return store.Get([]byte(key))
}
// set automatically marshalls and type check parameter
func (k Keeper) set(ctx sdk.Context, key string, param interface{}) error {
store := ctx.KVStore(k.key)
bz := store.Get([]byte(key))
if bz != nil {
ptrty := reflect.PtrTo(reflect.TypeOf(param))
ptr := reflect.New(ptrty).Interface()
if k.cdc.UnmarshalBinary(bz, ptr) != nil {
return fmt.Errorf("Type mismatch with stored param and provided param")
}
}
bz, err := k.cdc.MarshalBinary(param)
if err != nil {
return err
}
store.Set([]byte(key), bz)
return nil
}
// setRaw sets raw byte slice
func (k Keeper) setRaw(ctx sdk.Context, key string, param []byte) {
store := ctx.KVStore(k.key)
store.Set([]byte(key), param)
}
// Getter returns readonly struct
func (k Keeper) Getter() Getter {
return Getter{k}
}
// Setter returns read/write struct
func (k Keeper) Setter() Setter {
return Setter{Getter{k}}
}
// Getter exposes methods related with only getting params
type Getter struct {
k Keeper
}
// Get exposes get
func (k Getter) Get(ctx sdk.Context, key string, ptr interface{}) error {
return k.k.get(ctx, key, ptr)
}
// GetRaw exposes getRaw
func (k Getter) GetRaw(ctx sdk.Context, key string) []byte {
return k.k.getRaw(ctx, key)
}
// GetString is helper function for string params
func (k Getter) GetString(ctx sdk.Context, key string) (res string, err error) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
err = k.k.cdc.UnmarshalBinary(bz, &res)
return
}
// GetBool is helper function for bool params
func (k Getter) GetBool(ctx sdk.Context, key string) (res bool, err error) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
err = k.k.cdc.UnmarshalBinary(bz, &res)
return
}
// GetInt16 is helper function for int16 params
func (k Getter) GetInt16(ctx sdk.Context, key string) (res int16, err error) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
err = k.k.cdc.UnmarshalBinary(bz, &res)
return
}
// GetInt32 is helper function for int32 params
func (k Getter) GetInt32(ctx sdk.Context, key string) (res int32, err error) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
err = k.k.cdc.UnmarshalBinary(bz, &res)
return
}
// GetInt64 is helper function for int64 params
func (k Getter) GetInt64(ctx sdk.Context, key string) (res int64, err error) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
err = k.k.cdc.UnmarshalBinary(bz, &res)
return
}
// GetUint16 is helper function for uint16 params
func (k Getter) GetUint16(ctx sdk.Context, key string) (res uint16, err error) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
err = k.k.cdc.UnmarshalBinary(bz, &res)
return
}
// GetUint32 is helper function for uint32 params
func (k Getter) GetUint32(ctx sdk.Context, key string) (res uint32, err error) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
err = k.k.cdc.UnmarshalBinary(bz, &res)
return
}
// GetUint64 is helper function for uint64 params
func (k Getter) GetUint64(ctx sdk.Context, key string) (res uint64, err error) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
err = k.k.cdc.UnmarshalBinary(bz, &res)
return
}
// GetInt is helper function for sdk.Int params
func (k Getter) GetInt(ctx sdk.Context, key string) (res sdk.Int, err error) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
err = k.k.cdc.UnmarshalBinary(bz, &res)
return
}
// GetUint is helper function for sdk.Uint params
func (k Getter) GetUint(ctx sdk.Context, key string) (res sdk.Uint, err error) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
err = k.k.cdc.UnmarshalBinary(bz, &res)
return
}
// GetRat is helper function for rat params
func (k Getter) GetRat(ctx sdk.Context, key string) (res sdk.Rat, err error) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
err = k.k.cdc.UnmarshalBinary(bz, &res)
return
}
// GetStringWithDefault is helper function for string params with default value
func (k Getter) GetStringWithDefault(ctx sdk.Context, key string, def string) (res string) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
if bz == nil {
return def
}
k.k.cdc.MustUnmarshalBinary(bz, &res)
return
}
// GetBoolWithDefault is helper function for bool params with default value
func (k Getter) GetBoolWithDefault(ctx sdk.Context, key string, def bool) (res bool) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
if bz == nil {
return def
}
k.k.cdc.MustUnmarshalBinary(bz, &res)
return
}
// GetInt16WithDefault is helper function for int16 params with default value
func (k Getter) GetInt16WithDefault(ctx sdk.Context, key string, def int16) (res int16) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
if bz == nil {
return def
}
k.k.cdc.MustUnmarshalBinary(bz, &res)
return
}
// GetInt32WithDefault is helper function for int32 params with default value
func (k Getter) GetInt32WithDefault(ctx sdk.Context, key string, def int32) (res int32) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
if bz == nil {
return def
}
k.k.cdc.MustUnmarshalBinary(bz, &res)
return
}
// GetInt64WithDefault is helper function for int64 params with default value
func (k Getter) GetInt64WithDefault(ctx sdk.Context, key string, def int64) (res int64) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
if bz == nil {
return def
}
k.k.cdc.MustUnmarshalBinary(bz, &res)
return
}
// GetUint16WithDefault is helper function for uint16 params with default value
func (k Getter) GetUint16WithDefault(ctx sdk.Context, key string, def uint16) (res uint16) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
if bz == nil {
return def
}
k.k.cdc.MustUnmarshalBinary(bz, &res)
return
}
// GetUint32WithDefault is helper function for uint32 params with default value
func (k Getter) GetUint32WithDefault(ctx sdk.Context, key string, def uint32) (res uint32) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
if bz == nil {
return def
}
k.k.cdc.MustUnmarshalBinary(bz, &res)
return
}
// GetUint64WithDefault is helper function for uint64 params with default value
func (k Getter) GetUint64WithDefault(ctx sdk.Context, key string, def uint64) (res uint64) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
if bz == nil {
return def
}
k.k.cdc.MustUnmarshalBinary(bz, &res)
return
}
// GetIntWithDefault is helper function for sdk.Int params with default value
func (k Getter) GetIntWithDefault(ctx sdk.Context, key string, def sdk.Int) (res sdk.Int) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
if bz == nil {
return def
}
k.k.cdc.MustUnmarshalBinary(bz, &res)
return
}
// GetUintWithDefault is helper function for sdk.Uint params with default value
func (k Getter) GetUintWithDefault(ctx sdk.Context, key string, def sdk.Uint) (res sdk.Uint) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
if bz == nil {
return def
}
k.k.cdc.MustUnmarshalBinary(bz, &res)
return
}
// GetRatWithDefault is helper function for sdk.Rat params with default value
func (k Getter) GetRatWithDefault(ctx sdk.Context, key string, def sdk.Rat) (res sdk.Rat) {
store := ctx.KVStore(k.k.key)
bz := store.Get([]byte(key))
if bz == nil {
return def
}
k.k.cdc.MustUnmarshalBinary(bz, &res)
return
}
// Setter exposes all methods including Set
type Setter struct {
Getter
}
// Set exposes set
func (k Setter) Set(ctx sdk.Context, key string, param interface{}) error {
return k.k.set(ctx, key, param)
}
// SetRaw exposes setRaw
func (k Setter) SetRaw(ctx sdk.Context, key string, param []byte) {
k.k.setRaw(ctx, key, param)
}
// SetString is helper function for string params
func (k Setter) SetString(ctx sdk.Context, key string, param string) {
if err := k.k.set(ctx, key, param); err != nil {
panic(err)
}
}
// SetBool is helper function for bool params
func (k Setter) SetBool(ctx sdk.Context, key string, param bool) {
if err := k.k.set(ctx, key, param); err != nil {
panic(err)
}
}
// SetInt16 is helper function for int16 params
func (k Setter) SetInt16(ctx sdk.Context, key string, param int16) {
if err := k.k.set(ctx, key, param); err != nil {
panic(err)
}
}
// SetInt32 is helper function for int32 params
func (k Setter) SetInt32(ctx sdk.Context, key string, param int32) {
if err := k.k.set(ctx, key, param); err != nil {
panic(err)
}
}
// SetInt64 is helper function for int64 params
func (k Setter) SetInt64(ctx sdk.Context, key string, param int64) {
if err := k.k.set(ctx, key, param); err != nil {
panic(err)
}
}
// SetUint16 is helper function for uint16 params
func (k Setter) SetUint16(ctx sdk.Context, key string, param uint16) {
if err := k.k.set(ctx, key, param); err != nil {
panic(err)
}
}
// SetUint32 is helper function for uint32 params
func (k Setter) SetUint32(ctx sdk.Context, key string, param uint32) {
if err := k.k.set(ctx, key, param); err != nil {
panic(err)
}
}
// SetUint64 is helper function for uint64 params
func (k Setter) SetUint64(ctx sdk.Context, key string, param uint64) {
if err := k.k.set(ctx, key, param); err != nil {
panic(err)
}
}
// SetInt is helper function for sdk.Int params
func (k Setter) SetInt(ctx sdk.Context, key string, param sdk.Int) {
if err := k.k.set(ctx, key, param); err != nil {
panic(err)
}
}
// SetUint is helper function for sdk.Uint params
func (k Setter) SetUint(ctx sdk.Context, key string, param sdk.Uint) {
if err := k.k.set(ctx, key, param); err != nil {
panic(err)
}
}
// SetRat is helper function for rat params
func (k Setter) SetRat(ctx sdk.Context, key string, param sdk.Rat) {
if err := k.k.set(ctx, key, param); err != nil {
panic(err)
}
}