/
keeper.go
183 lines (162 loc) · 5.55 KB
/
keeper.go
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package keeper
import (
"fmt"
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/mesg-foundation/engine/hash"
"github.com/mesg-foundation/engine/ownership"
"github.com/mesg-foundation/engine/x/ownership/internal/types"
"github.com/tendermint/tendermint/libs/log"
)
// Keeper of the ownership store
type Keeper struct {
storeKey sdk.StoreKey
cdc *codec.Codec
bankKeeper types.BankKeeper
}
// NewKeeper creates a ownership keeper
func NewKeeper(cdc *codec.Codec, key sdk.StoreKey, bankKeeper types.BankKeeper) Keeper {
keeper := Keeper{
storeKey: key,
cdc: cdc,
bankKeeper: bankKeeper,
}
return keeper
}
// Logger returns a module-specific logger.
func (k Keeper) Logger(ctx sdk.Context) log.Logger {
return ctx.Logger().With("module", fmt.Sprintf("x/%s", types.ModuleName))
}
// List returns all ownerships.
func (k *Keeper) List(ctx sdk.Context) ([]*ownership.Ownership, error) {
var (
ownerships []*ownership.Ownership
iter = ctx.KVStore(k.storeKey).Iterator(nil, nil)
)
defer iter.Close()
for iter.Valid() {
var o *ownership.Ownership
if err := k.cdc.UnmarshalBinaryLengthPrefixed(iter.Value(), &o); err != nil {
return nil, sdkerrors.Wrapf(sdkerrors.ErrJSONUnmarshal, err.Error())
}
ownerships = append(ownerships, o)
iter.Next()
}
return ownerships, nil
}
// Set creates a new ownership.
func (k Keeper) Set(ctx sdk.Context, owner sdk.AccAddress, resourceHash hash.Hash, resource ownership.Ownership_Resource, resourceAddress sdk.AccAddress) (*ownership.Ownership, error) {
store := ctx.KVStore(k.storeKey)
own, err := k.get(store, resourceHash)
if err != nil {
return nil, err
}
if own != nil {
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnauthorized, "resource %s:%q already has an owner", resource, resourceHash)
}
own, err = ownership.New(owner.String(), resource, resourceHash, resourceAddress)
if err != nil {
return nil, sdkerrors.Wrapf(sdkerrors.ErrInvalidRequest, err.Error())
}
data, err := k.cdc.MarshalBinaryLengthPrefixed(own)
if err != nil {
return nil, sdkerrors.Wrapf(sdkerrors.ErrJSONMarshal, err.Error())
}
store.Set(own.Hash, data)
// emit event
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventType,
sdk.NewAttribute(sdk.AttributeKeyAction, types.AttributeActionCreated),
sdk.NewAttribute(types.AttributeKeyHash, own.Hash.String()),
sdk.NewAttribute(types.AttributeKeyResourceHash, own.ResourceHash.String()),
sdk.NewAttribute(types.AttributeKeyResourceType, own.Resource.String()),
sdk.NewAttribute(types.AttributeKeyResourceAddress, own.ResourceAddress.String()),
),
)
return own, nil
}
// Delete deletes an ownership.
func (k Keeper) Delete(ctx sdk.Context, owner sdk.AccAddress, resourceHash hash.Hash) error {
store := ctx.KVStore(k.storeKey)
own, err := k.get(store, resourceHash)
if err != nil {
return err
}
if own == nil {
return sdkerrors.Wrapf(sdkerrors.ErrInvalidRequest, "resource %q do not have any ownership", resourceHash)
}
if own.Owner != owner.String() {
return sdkerrors.Wrapf(sdkerrors.ErrUnauthorized, "resource %q is not owned by you", resourceHash)
}
// transfer all spendable coins from resource address to owner
coins := k.bankKeeper.GetCoins(ctx, own.ResourceAddress)
if !coins.IsZero() {
if err := k.bankKeeper.SendCoins(ctx, own.ResourceAddress, owner, coins); err != nil {
return err
}
}
// remove ownership
store.Delete(own.Hash)
// emit event
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventType,
sdk.NewAttribute(sdk.AttributeKeyAction, types.AttributeActionDeleted),
sdk.NewAttribute(types.AttributeKeyHash, own.Hash.String()),
sdk.NewAttribute(types.AttributeKeyResourceHash, own.ResourceHash.String()),
sdk.NewAttribute(types.AttributeKeyResourceType, own.Resource.String()),
sdk.NewAttribute(types.AttributeKeyResourceAddress, own.ResourceAddress.String()),
),
)
return nil
}
// Withdraw try to withdraw coins to owner rom specific resource.
func (k Keeper) Withdraw(ctx sdk.Context, msg types.MsgWithdraw) error {
store := ctx.KVStore(k.storeKey)
amount, err := sdk.ParseCoins(msg.Amount)
if err != nil {
return sdkerrors.Wrapf(sdkerrors.ErrInvalidRequest, err.Error())
}
own, err := k.get(store, msg.ResourceHash)
if err != nil {
return err
}
if own == nil {
return sdkerrors.Wrapf(sdkerrors.ErrInvalidRequest, "resource %q does not have any ownership", msg.ResourceHash)
}
if own.Owner != msg.Owner.String() {
return sdkerrors.Wrapf(sdkerrors.ErrUnauthorized, "resource %q is not owned by you", msg.ResourceHash)
}
return k.bankKeeper.SendCoins(ctx, own.ResourceAddress, msg.Owner, amount)
}
// get returns the ownership of a given resource.
func (k Keeper) get(store sdk.KVStore, resourceHash hash.Hash) (*ownership.Ownership, error) {
iter := store.Iterator(nil, nil)
var own *ownership.Ownership
for iter.Valid() {
if err := k.cdc.UnmarshalBinaryLengthPrefixed(iter.Value(), &own); err != nil {
return nil, sdkerrors.Wrapf(sdkerrors.ErrJSONUnmarshal, err.Error())
}
if own.ResourceHash.Equal(resourceHash) {
iter.Close()
return own, nil
}
iter.Next()
}
iter.Close()
return nil, nil
}
// Import imports a list of ownerships into the store.
func (k *Keeper) Import(ctx sdk.Context, ownerships []*ownership.Ownership) error {
store := ctx.KVStore(k.storeKey)
for _, own := range ownerships {
value, err := k.cdc.MarshalBinaryLengthPrefixed(own)
if err != nil {
return sdkerrors.Wrapf(sdkerrors.ErrJSONMarshal, err.Error())
}
store.Set(own.Hash, value)
}
return nil
}