/
change.go
203 lines (166 loc) · 6.29 KB
/
change.go
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package keeper
import (
"fmt"
"github.com/celer-network/sgn/x/sync/types"
"github.com/cosmos/cosmos-sdk/client"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
)
// SubmitChange create new change given a content
func (keeper Keeper) SubmitChange(ctx sdk.Context, changeType string, data []byte, blockNum uint64, initiatorAddr sdk.AccAddress) (types.Change, error) {
changeID, err := keeper.GetChangeID(ctx)
if err != nil {
return types.Change{}, err
}
submitTime := ctx.BlockHeader().Time
votingPeriod := keeper.GetVotingParams(ctx).VotingPeriod
change := types.NewChange(changeID, changeType, data, blockNum, submitTime, submitTime.Add(votingPeriod), initiatorAddr)
change.Rewardable = keeper.checkRewardable(ctx, change)
keeper.SetChange(ctx, change)
keeper.InsertActiveChangeQueue(ctx, changeID)
keeper.SetChangeID(ctx, changeID+1)
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeSync,
sdk.NewAttribute(sdk.AttributeKeyAction, types.ActionSubmitChange),
sdk.NewAttribute(types.AttributeKeyChangeID, fmt.Sprintf("%d", changeID)),
),
)
return change, nil
}
func (keeper Keeper) checkRewardable(ctx sdk.Context, change types.Change) bool {
syncer := keeper.validatorKeeper.GetSyncer(ctx)
if !syncer.ValidatorAddr.Equals(change.Initiator) {
return false
}
changeType := change.Type
return changeType == types.UpdateSidechainAddr || changeType == types.GuardTrigger ||
changeType == types.SyncDelegator || changeType == types.SyncValidator
}
// ApproveChange adds a vote on a specific change
func (keeper Keeper) ApproveChange(ctx sdk.Context, changeID uint64, voterAddr sdk.AccAddress) error {
change, ok := keeper.GetChange(ctx, changeID)
if !ok {
return sdkerrors.Wrapf(types.ErrUnknownChange, "%d", changeID)
}
if change.Status != types.StatusActive {
// Exit if the change has been approved or expired
return nil
}
for _, voter := range change.Voters {
if voter.Equals(voterAddr) {
return sdkerrors.Wrapf(types.ErrDoubleVote, "%d", changeID)
}
}
change.Voters = append(change.Voters, sdk.ValAddress(voterAddr))
keeper.SetChange(ctx, change)
return nil
}
// GetChange get change from store by ID
func (keeper Keeper) GetChange(ctx sdk.Context, changeID uint64) (change types.Change, ok bool) {
store := ctx.KVStore(keeper.storeKey)
bz := store.Get(types.ChangeKey(changeID))
if bz == nil {
return
}
keeper.cdc.MustUnmarshalBinaryLengthPrefixed(bz, &change)
return change, true
}
// SetChange set a change to store
func (keeper Keeper) SetChange(ctx sdk.Context, change types.Change) {
store := ctx.KVStore(keeper.storeKey)
bz := keeper.cdc.MustMarshalBinaryLengthPrefixed(change)
store.Set(types.ChangeKey(change.ID), bz)
}
// IterateChanges iterates over the all the changes and performs a callback function
func (keeper Keeper) IterateChanges(ctx sdk.Context, cb func(change types.Change) (stop bool)) {
store := ctx.KVStore(keeper.storeKey)
iterator := sdk.KVStorePrefixIterator(store, types.ChangesKeyPrefix)
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
var change types.Change
keeper.cdc.MustUnmarshalBinaryLengthPrefixed(iterator.Value(), &change)
if cb(change) {
break
}
}
}
// GetChanges returns all the changes from store
func (keeper Keeper) GetChanges(ctx sdk.Context) (changes types.Changes) {
keeper.IterateChanges(ctx, func(change types.Change) bool {
changes = append(changes, change)
return false
})
return
}
// GetChangesFiltered retrieves changes filtered by a given set of params which
// include pagination parameters along with voter and depositor addresses and a
// change status. The voter address will filter changes by whether or not
// that address has voted on changes. The depositor address will filter changes
// by whether or not that address has deposited to them. Finally, status will filter
// changes by status.
//
// NOTE: If no filters are provided, all changes will be returned in paginated
// form.
func (keeper Keeper) GetChangesFiltered(ctx sdk.Context, params types.QueryChangesParams) []types.Change {
changes := keeper.GetChanges(ctx)
filteredChanges := make([]types.Change, 0, len(changes))
for _, p := range changes {
matchStatus := true
// match status (if supplied/valid)
if types.ValidChangeStatus(params.ChangeStatus) {
matchStatus = p.Status == params.ChangeStatus
}
if matchStatus {
filteredChanges = append(filteredChanges, p)
}
}
start, end := client.Paginate(len(filteredChanges), params.Page, params.Limit, 100)
if start < 0 || end < 0 {
filteredChanges = []types.Change{}
} else {
filteredChanges = filteredChanges[start:end]
}
return filteredChanges
}
// GetChangeID gets the highest change ID
func (keeper Keeper) GetChangeID(ctx sdk.Context) (changeID uint64, err error) {
store := ctx.KVStore(keeper.storeKey)
bz := store.Get(types.ChangeIDKey)
if bz == nil {
return 0, sdkerrors.Wrap(types.ErrInvalidGenesis, "initial change ID hasn't been set")
}
changeID = types.GetChangeIDFromBytes(bz)
return changeID, nil
}
// SetChangeID sets the new change ID to the store
func (keeper Keeper) SetChangeID(ctx sdk.Context, changeID uint64) {
store := ctx.KVStore(keeper.storeKey)
store.Set(types.ChangeIDKey, types.GetChangeIDBytes(changeID))
}
// InsertActiveChangeQueue inserts a ID into the active change queue
func (keeper Keeper) InsertActiveChangeQueue(ctx sdk.Context, changeID uint64) {
store := ctx.KVStore(keeper.storeKey)
bz := types.GetChangeIDBytes(changeID)
store.Set(types.ActiveChangeQueueKey(changeID), bz)
}
// RemoveFromActiveChangeQueue removes a changeID from the Active Change Queue
func (keeper Keeper) RemoveFromActiveChangeQueue(ctx sdk.Context, changeID uint64) {
store := ctx.KVStore(keeper.storeKey)
store.Delete(types.ActiveChangeQueueKey(changeID))
}
// GetActiveChanges get all the active changes
func (keeper Keeper) GetActiveChanges(ctx sdk.Context) (changes types.Changes) {
store := ctx.KVStore(keeper.storeKey)
iterator := sdk.KVStorePrefixIterator(store, types.ActiveChangeQueuePrefix)
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
changeID := types.GetChangeIDFromBytes(iterator.Value())
change, found := keeper.GetChange(ctx, changeID)
if !found {
panic(fmt.Sprintf("change %d does not exist", changeID))
}
changes = append(changes, change)
}
return
}