chore: rename UMEE token to UX token part1

app/modules.go

@@ -31,11 +31,10 @@ type BankModule struct {
 	bank.AppModuleBasic
 }
 
-// DefaultGenesis returns custom Umee x/bank module genesis state.
-func (BankModule) DefaultGenesis(cdc codec.JSONCodec) json.RawMessage {
-	umeeMetadata := banktypes.Metadata{
+func umeeTokenMetadata() banktypes.Metadata {
+	return banktypes.Metadata{
 		Description: "The native staking token of the Umee network.",
-		Base:        appparams.BondDenom,
+		Base:        appparams.BondDenom, // NOTE: must not change
 		Name:        appparams.DisplayDenom,
 		Display:     appparams.DisplayDenom,
 		Symbol:      appparams.DisplayDenom,
@@ -44,17 +43,20 @@ func (BankModule) DefaultGenesis(cdc codec.JSONCodec) json.RawMessage {
 				Denom:    appparams.BondDenom,
 				Exponent: 0,
 				Aliases: []string{
-					"microumee",
+					"microumee", appparams.BaseExtraDenom,
 				},
-			},
-			{
+			}, {
 				Denom:    appparams.DisplayDenom,
 				Exponent: 6,
-				Aliases:  []string{},
+				Aliases:  []string{appparams.LegacyDisplayDenom},
 			},
 		},
 	}
+}
 
+// DefaultGenesis returns custom Umee x/bank module genesis state.
+func (BankModule) DefaultGenesis(cdc codec.JSONCodec) json.RawMessage {
+	umeeMetadata := umeeTokenMetadata()
 	genState := banktypes.DefaultGenesisState()
 	genState.DenomMetadata = append(genState.DenomMetadata, umeeMetadata)
 

app/params/app_settings.go

@@ -11,10 +11,16 @@ const (
 	Name = "umee"
 
 	// BondDenom defines the native staking token denomination.
+	// NOTE: it is used by IBC, and must not change to avoid token migration in all IBC chains.
 	BondDenom = "uumee"
 
+	BaseExtraDenom = "uux"
+
 	// DisplayDenom defines the name, symbol, and display value of the umee token.
-	DisplayDenom = "UMEE"
+	DisplayDenom = "UX"
+
+	// Old display name. We renamed UMEE to UX.
+	LegacyDisplayDenom = "UMEE"
 
 	// DefaultGasLimit - set to the same value as cosmos-sdk flags.DefaultGasLimit
 	// this value is currently only used in tests.
@@ -36,4 +42,9 @@ func init() {
 	if AccountAddressPrefix != Name {
 		log.Fatal("AccountAddresPrefix must equal Name")
 	}
+
+	sdk.SetCoinDenomRegex(func() string {
+		// allow "ux" token. Default regexp requires denom to be at least 3 characters long.
+		return `[a-zA-Z][a-zA-Z0-9/:._-]{1,127}`
+	})
 }

app/params/app_settings_test.go

@@ -0,0 +1,17 @@
+package params
+
+import (
+	"testing"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestDenoms(t *testing.T) {
+	assert := assert.New(t)
+
+	assert.NoError(sdk.ValidateDenom(BondDenom))
+	assert.NoError(sdk.ValidateDenom(BaseExtraDenom))
+	assert.NoError(sdk.ValidateDenom(DisplayDenom))
+	assert.NoError(sdk.ValidateDenom(LegacyDisplayDenom))
+}

app/params/prefix.go

@@ -5,6 +5,7 @@ import (
 )
 
 // AccountAddressPrefix defines the Umee network's Bech32 address prefix.
+// NOTE: this must not be changed.
 const AccountAddressPrefix = "umee"
 
 // Account specific Bech32 prefixes.

app/upgrades.go

@@ -115,6 +115,11 @@ func (app *UmeeApp) registerUpgrade6_2(upgradeInfo upgradetypes.Plan) {
 			if err != nil {
 				return fromVM, err
 			}
+
+			// migration UMEE -> UX token metadata
+			app.BankKeeper.SetDenomMetaData(ctx, umeeTokenMetadata())
+
+			// Initialize a new Cosmos SDK 0.47 parameter: MinInitialDepositRatio
 			govParams := app.GovKeeper.GetParams(ctx)
 			govParams.MinInitialDepositRatio = sdk.NewDecWithPrec(1, 1).String()
 			err = app.GovKeeper.SetParams(ctx, govParams)
@@ -126,6 +131,7 @@ func (app *UmeeApp) registerUpgrade6_2(upgradeInfo upgradetypes.Plan) {
 			uIBCKeeper := app.UIbcQuotaKeeperB.Keeper(&ctx)
 			uIBCKeeper.MigrateTotalOutflowSum()
 			err = uIBCKeeper.SetParams(uibc.DefaultParams())
+
 			return fromVM, err
 		},
 	)