From 198a7010614ed701d7fe062e986d4f6faed1fce8 Mon Sep 17 00:00:00 2001
From: Puneet <59960662+puneet2019@users.noreply.github.com>
Date: Sun, 17 Dec 2023 03:57:16 +0530
Subject: [PATCH] add method to derive hostDenom from mintDenom and reverse.
 (#701)

---
 x/liquidstakeibc/keeper/msg_server.go    | 4 ++--
 x/liquidstakeibc/types/host_chain.go     | 4 +---
 x/liquidstakeibc/types/liquidstakeibc.go | 8 ++++++++
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/x/liquidstakeibc/keeper/msg_server.go b/x/liquidstakeibc/keeper/msg_server.go
index d5394d6a1..1113e770f 100644
--- a/x/liquidstakeibc/keeper/msg_server.go
+++ b/x/liquidstakeibc/keeper/msg_server.go
@@ -585,7 +585,7 @@ func (k msgServer) LiquidUnstake(
 	ctx := sdktypes.UnwrapSDKContext(goCtx)
 
 	// parse the chain host denom from the stk denom
-	_, hostDenom, found := strings.Cut(msg.Amount.Denom, "/")
+	hostDenom, found := types.MintDenomToHostDenom(msg.Amount.Denom)
 	if !found {
 		return nil, errorsmod.Wrapf(types.ErrInvalidHostChain,
 			"could not parse chain host denom from %s",
@@ -708,7 +708,7 @@ func (k msgServer) Redeem(
 	ctx := sdktypes.UnwrapSDKContext(goCtx)
 
 	// parse the chain host denom from the stk denom
-	_, hostDenom, found := strings.Cut(msg.Amount.Denom, "/")
+	hostDenom, found := types.MintDenomToHostDenom(msg.Amount.Denom)
 	if !found {
 		return nil, errorsmod.Wrapf(types.ErrInvalidHostChain,
 			"could not parse chain host denom from %s",
diff --git a/x/liquidstakeibc/types/host_chain.go b/x/liquidstakeibc/types/host_chain.go
index c3e828a23..19cc9fe7c 100644
--- a/x/liquidstakeibc/types/host_chain.go
+++ b/x/liquidstakeibc/types/host_chain.go
@@ -1,8 +1,6 @@
 package types
 
 import (
-	"fmt"
-
 	"cosmossdk.io/math"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	ibctfrtypes "github.com/cosmos/ibc-go/v7/modules/apps/transfer/types"
@@ -13,7 +11,7 @@ func (hc *HostChain) IBCDenom() string {
 }
 
 func (hc *HostChain) MintDenom() string {
-	return fmt.Sprintf("%s/%s", LiquidStakeDenomPrefix, hc.HostDenom)
+	return HostDenomToMintDenom(hc.HostDenom)
 }
 
 func (hc *HostChain) GetValidator(operatorAddress string) (*Validator, bool) {
diff --git a/x/liquidstakeibc/types/liquidstakeibc.go b/x/liquidstakeibc/types/liquidstakeibc.go
index 587a9f69c..7f726e90a 100644
--- a/x/liquidstakeibc/types/liquidstakeibc.go
+++ b/x/liquidstakeibc/types/liquidstakeibc.go
@@ -14,6 +14,14 @@ func IsLiquidStakingDenom(denom string) bool {
 	return strings.HasPrefix(denom, fmt.Sprintf("%s/", LiquidStakeDenomPrefix))
 }
 
+func MintDenomToHostDenom(mintDenom string) (string, bool) {
+	return strings.CutPrefix(mintDenom, fmt.Sprintf("%s/", LiquidStakeDenomPrefix))
+}
+
+func HostDenomToMintDenom(hostDenom string) string {
+	return fmt.Sprintf("%s/%s", LiquidStakeDenomPrefix, hostDenom)
+}
+
 func IsUnbondingEpoch(factor, epochNumber int64) bool {
 	return epochNumber%factor == 0
 }