github.com/cosmos/cosmos-sdk@v0.50.10/x/gov/migrations/v5/store.go (about)

     1  package v5
     2  
     3  import (
     4  	"cosmossdk.io/collections"
     5  	corestoretypes "cosmossdk.io/core/store"
     6  
     7  	"github.com/cosmos/cosmos-sdk/codec"
     8  	sdk "github.com/cosmos/cosmos-sdk/types"
     9  	v4 "github.com/cosmos/cosmos-sdk/x/gov/migrations/v4"
    10  	govv1 "github.com/cosmos/cosmos-sdk/x/gov/types/v1"
    11  )
    12  
    13  var (
    14  	// ParamsKey is the key of x/gov params
    15  	ParamsKey = []byte{0x30}
    16  	// ConstitutionKey is the key of x/gov constitution
    17  	ConstitutionKey = collections.NewPrefix(49)
    18  )
    19  
    20  // MigrateStore performs in-place store migrations from v4 (v0.47) to v5 (v0.50). The
    21  // migration includes:
    22  //
    23  // Addition of the new proposal expedited parameters that are set to 0 by default.
    24  // Set of default chain constitution.
    25  func MigrateStore(ctx sdk.Context, storeService corestoretypes.KVStoreService, cdc codec.BinaryCodec, constitutionCollection collections.Item[string]) error {
    26  	store := storeService.OpenKVStore(ctx)
    27  	paramsBz, err := store.Get(v4.ParamsKey)
    28  	if err != nil {
    29  		return err
    30  	}
    31  
    32  	var params govv1.Params
    33  	err = cdc.Unmarshal(paramsBz, &params)
    34  	if err != nil {
    35  		return err
    36  	}
    37  
    38  	defaultParams := govv1.DefaultParams()
    39  	params.ExpeditedMinDeposit = defaultParams.ExpeditedMinDeposit
    40  	params.ExpeditedVotingPeriod = defaultParams.ExpeditedVotingPeriod
    41  	params.ExpeditedThreshold = defaultParams.ExpeditedThreshold
    42  	params.ProposalCancelRatio = defaultParams.ProposalCancelRatio
    43  	params.ProposalCancelDest = defaultParams.ProposalCancelDest
    44  	params.MinDepositRatio = defaultParams.MinDepositRatio
    45  
    46  	bz, err := cdc.Marshal(&params)
    47  	if err != nil {
    48  		return err
    49  	}
    50  
    51  	if err := store.Set(ParamsKey, bz); err != nil {
    52  		return err
    53  	}
    54  
    55  	// Set the default consisitution if it is not set
    56  	if ok, err := constitutionCollection.Has(ctx); !ok || err != nil {
    57  		if err := constitutionCollection.Set(ctx, "This chain has no constitution."); err != nil {
    58  			return err
    59  		}
    60  	}
    61  
    62  	return nil
    63  }