Add a new token and only allow fees in alnt (#68)

Part of https://www.notion.so/Multiple-tokens-support-and-disable-transfers-for-LSTAKE-1f2a6b22d47280269f87df3fe03e8d64
- Add base token with denoms `alps` and `lps` (`1 lps = 10^18 alps`)
- Keep `alnt` as the staking token and for laconic module ops
- Accept tx fees only in `alnt`

Reviewed-on: cerc-io/laconicd#68
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Co-committed-by: Prathamesh Musale <prathamesh.musale0@gmail.com>

app/params/config.go

@@ -10,11 +10,14 @@ import (
 )
 
 const (
-	CoinUnit     = "lnt"
-	BaseCoinUnit = "alnt"
-	LntExponent  = 18
+	// Registered token
+	LpsCoinUnit     = "lps"
+	LpsBaseCoinUnit = "alps"
+	LpsExponent     = 18
 
-	DefaultBondDenom = BaseCoinUnit
+	// Native token, only denominated in alnt
+	// Used for staking, fees and laconic module ops
+	CoinUnit = "alnt"
 
 	// Bech32PrefixAccAddr defines the Bech32 prefix of an account's address.
 	Bech32PrefixAccAddr = "laconic"
@@ -39,12 +42,11 @@ func init() {
 }
 
 func RegisterDenoms() {
-	err := sdk.RegisterDenom(CoinUnit, math.LegacyOneDec())
+	err := sdk.RegisterDenom(LpsCoinUnit, math.LegacyOneDec())
 	if err != nil {
 		panic(err)
 	}
-
-	err = sdk.RegisterDenom(BaseCoinUnit, math.LegacyNewDecWithPrec(1, LntExponent))
+	err = sdk.RegisterDenom(LpsBaseCoinUnit, math.LegacyNewDecWithPrec(1, LpsExponent))
 	if err != nil {
 		panic(err)
 	}