update denom validation regexp

app/params/app_settings.go

@@ -42,4 +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.