/
migrations.go
73 lines (61 loc) · 2.07 KB
/
migrations.go
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package keeper
import (
"fmt"
"strings"
banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/fibonacci-chain/core/x/tokenfactory/types"
)
const KeySeparator = "|"
// Migrator is a struct for handling in-place store migrations.
type Migrator struct {
keeper Keeper
}
// NewMigrator returns a new Migrator.
func NewMigrator(keeper Keeper) Migrator {
return Migrator{keeper: keeper}
}
// Migrate2to3 migrates from version 2 to 3.
func (m Migrator) Migrate2to3(ctx sdk.Context) error {
// Reset params after removing the denom creation fee param
defaultParams := types.DefaultParams()
m.keeper.paramSpace.SetParamSet(ctx, &defaultParams)
// We remove the denom creation fee whitelist in this migration
store := ctx.KVStore(m.keeper.storeKey)
oldCreateDenomFeeWhitelistKey := "createdenomfeewhitelist"
oldCreateDenomFeeWhitelistPrefix := []byte(strings.Join([]string{oldCreateDenomFeeWhitelistKey, ""}, KeySeparator))
iter := sdk.KVStorePrefixIterator(store, oldCreateDenomFeeWhitelistPrefix)
defer iter.Close()
for ; iter.Valid(); iter.Next() {
store.Delete(iter.Key())
}
return nil
}
func (m Migrator) Migrate3to4(ctx sdk.Context) error {
// Set denom metadata for all denoms
iter := m.keeper.GetAllDenomsIterator(ctx)
defer iter.Close()
for ; iter.Valid(); iter.Next() {
denom := string(iter.Value())
if denomMetadata, err := m.keeper.bankKeeper.GetDenomMetaData(ctx, denom); !err {
panic(fmt.Errorf("denom %s does not exist", denom))
} else {
fmt.Printf("Migrating denom: %s\n", denom)
m.SetMetadata(&denomMetadata)
m.keeper.bankKeeper.SetDenomMetaData(ctx, denomMetadata)
}
}
return nil
}
func (m Migrator) SetMetadata(denomMetadata *banktypes.Metadata) {
if len(denomMetadata.Base) == 0 {
panic(fmt.Errorf("no base exists for denom %v", denomMetadata))
}
if len(denomMetadata.Display) == 0 {
denomMetadata.Display = denomMetadata.Base
denomMetadata.Name = denomMetadata.Base
denomMetadata.Symbol = denomMetadata.Base
} else {
fmt.Printf("Denom %s already has denom set", denomMetadata.Base)
}
}