write unit test first

x/authz/keeper/keeper.go

@@ -217,6 +217,17 @@ func (k Keeper) SaveGrant(ctx context.Context, grantee, granter sdk.AccAddress,
 // by the granter.
 func (k Keeper) DeleteGrant(ctx context.Context, grantee, granter sdk.AccAddress, msgType string) error {
 	store := k.environment.KVStoreService.OpenKVStore(ctx)
+	fmt.Println(grantee.Bytes()) //[165 136 86 240 253 83 191 5 139 73 9 162 26 236 1 145 7 186 97 1]
+	fmt.Println(granter.Bytes()) //	[165 136 86 240 253 83 191 5 139 73 9 162 26 236 1 145 7 186 97 0]
+
+	fmt.Println(grantee.String())
+	fmt.Println(granter.String())
+
+	//[165 136 86 240 253 83 191 5 139 73 9 162 26 236 1 145 7 186 97 1]
+	//	[165 136 86 240 253 83 191 5 139 73 9 162 26 236 1 145 7 186 97 0]
+	//	cosmos15ky9du8a2wlstz6fpx3p4mqpjyrm5cgp0ctjdj
+	//	cosmos15ky9du8a2wlstz6fpx3p4mqpjyrm5cgqjwl8sq
+
 	skey := grantStoreKey(grantee, granter, msgType)
 	grant, found := k.getGrant(ctx, skey)
 	if !found {

x/authz/keeper/keys.go

@@ -1,6 +1,7 @@
 package keeper
 
 import (
+	"fmt"
 	"time"
 
 	"cosmossdk.io/x/authz"
@@ -98,3 +99,19 @@ func firstAddressFromGrantStoreKey(key []byte) sdk.AccAddress {
 	addrLen := key[0]
 	return sdk.AccAddress(key[1 : 1+addrLen])
 }
+
+func grantKeyToString(skey []byte) string {
+	prefix := skey[0]
+	granterAddressLen := skey[1]
+	var ll = int(granterAddressLen)
+	granterAddressBytes := skey[2 : 2+ll]
+	granteeAddressLen := skey[2+ll+1]
+	var ll2 = int(granteeAddressLen)
+	granteeAddressBytes := skey[2+ll+1 : 2+ll+1+ll2]
+	msgTypeBytes := skey[2+ll+1+ll2:]
+
+	granterAddr := sdk.AccAddress(granterAddressBytes)
+	granteeAddr := sdk.AccAddress(granteeAddressBytes)
+
+	return fmt.Sprintf("%d %d %s %d %s %s", prefix, ll, granterAddr.String(), ll2, granteeAddr.String(), msgTypeBytes)
+}

x/authz/keeper/keys_test.go

@@ -40,3 +40,18 @@ func TestGrantQueueKey(t *testing.T) {
 	require.Equal(t, granter, granter1)
 	require.Equal(t, grantee, grantee1)
 }
+
+func TestParseGrantStoreKey(t *testing.T) {
+	// SetUp
+	granteeAddr, _ := sdk.AccAddressFromBech32("cosmos15ky9du8a2wlstz6fpx3p4mqpjyrm5cgp0ctjdj")
+	granterAddr, _ := sdk.AccAddressFromBech32("cosmos15ky9du8a2wlstz6fpx3p4mqpjyrm5cgqjwl8sq")
+	msg := "/cosmos.bank.v1beta1.MsgSend"
+	skey := grantStoreKey(granteeAddr, granterAddr, msg)
+
+	// Action
+	actual := grantKeyToString(skey)
+
+	// Assert
+	expected := "1|20|cosmos15ky9du8a2wlstz6fpx3p4mqpjyrm5cgqjwl8sq|20|cosmos15ky9du8a2wlstz6fpx3p4mqpjyrm5cgp0ctjdj|/cosmos.bank.v1beta1.MsgSend"
+	require.Equal(t, expected, actual)
+}