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migration.go
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migration.go
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package v2
import (
"fmt"
storetypes "cosmossdk.io/store/types"
sdk "github.com/cosmos/cosmos-sdk/types"
consumertypes "github.com/cosmos/interchain-security/v5/x/ccv/consumer/types"
ccvtypes "github.com/cosmos/interchain-security/v5/x/ccv/types"
)
// MigrateConsumerPacketData migrates consumer packet data according to
// https://github.com/cosmos/interchain-security/pull/1037
//
// Note: an equivalent migration is not required for providers.
func MigrateConsumerPacketData(ctx sdk.Context, store storetypes.KVStore) error {
// retrieve old data an deserialize
var oldData consumertypes.ConsumerPacketDataList
bz := store.Get([]byte{consumertypes.PendingDataPacketsBytePrefix})
if bz == nil {
ctx.Logger().Info("no pending data packets to migrate")
return nil
}
err := oldData.Unmarshal(bz)
if err != nil {
return fmt.Errorf("failed to unmarshal pending data packets: %w", err)
}
// re-serialize packet data in new format, with the same key prefix,
// index incrementation happens in getAndIncrementPendingPacketsIdx
// the loop operations are equivalent to consumerkeeper.AppendPendingPacket()
for _, data := range oldData.List {
idx := getAndIncrementPendingPacketsIdx(ctx, store)
key := consumertypes.PendingDataPacketsKey(idx)
cpd := ccvtypes.NewConsumerPacketData(data.Type, data.Data)
bz, err := cpd.Marshal()
if err != nil {
// This should never happen
panic(fmt.Errorf("failed to marshal ConsumerPacketData: %w", err))
}
store.Set(key, bz)
}
store.Delete([]byte{consumertypes.PendingDataPacketsBytePrefix})
return nil
}
// getAndIncrementPendingPacketsIdx returns the current pending packets index and increments it.
func getAndIncrementPendingPacketsIdx(ctx sdk.Context, store storetypes.KVStore) (toReturn uint64) {
bz := store.Get(consumertypes.PendingPacketsIndexKey())
if bz != nil {
toReturn = sdk.BigEndianToUint64(bz)
}
toStore := toReturn + 1
store.Set(consumertypes.PendingPacketsIndexKey(), sdk.Uint64ToBigEndian(toStore))
return toReturn
}