GSW-1839 Refactor/position contract utils (#433)

* GSW-1839 refactor: integrated helper and test code
- integrated helper with nft helper
- add test helper code
- add test code for helper
- change file filename

* GSW-1839 refactor: utils
- add assert functions
- refactor original util functions

* Update position/utils_test.gno
* test: Update to use the correct test values

---------

Co-authored-by: Blake <[email protected]>

Author: onlyhyde

Diff for: position/position.gno

@@ -105,12 +105,12 @@ func Mint(
 
 	poolSqrtPriceX96 := pl.PoolGetSlot0SqrtPriceX96(poolPath)
 
-	prevAddr, prevRealm := getPrev()
+	prevAddr, prevPkgPath := getPrevAsString()
 
 	std.Emit(
 		"Mint",
 		"prevAddr", prevAddr,
-		"prevRealm", prevRealm,
+		"prevRealm", prevPkgPath,
 		"tickLower", ufmt.Sprintf("%d", tickLower),
 		"tickUpper", ufmt.Sprintf("%d", tickUpper),
 		"poolPath", poolPath,
@@ -265,12 +265,12 @@ func IncreaseLiquidity(
 
 	poolSqrtPriceX96 := pl.PoolGetSlot0SqrtPriceX96(poolPath)
 
-	prevAddr, prevRealm := getPrev()
+	prevAddr, prevPkgPath := getPrevAsString()
 
 	std.Emit(
 		"IncreaseLiquidity",
 		"prevAddr", prevAddr,
-		"prevRealm", prevRealm,
+		"prevRealm", prevPkgPath,
 		"lpTokenId", ufmt.Sprintf("%d", tokenId),
 		"internal_poolPath", poolPath,
 		"internal_liquidity", liquidity.ToString(),
@@ -386,12 +386,12 @@ func DecreaseLiquidity(
 
 	poolSqrtPriceX96 := pl.PoolGetSlot0SqrtPriceX96(poolPath)
 
-	prevAddr, prevRealm := getPrev()
+	prevAddr, prevPkgPath := getPrevAsString()
 
 	std.Emit(
 		"DecreaseLiquidity",
 		"prevAddr", prevAddr,
-		"prevRealm", prevRealm,
+		"prevRealm", prevPkgPath,
 		"lpTokenId", ufmt.Sprintf("%d", tokenId),
 		"liquidityRatio", ufmt.Sprintf("%d", liquidityRatio),
 		"internal_poolPath", poolPath,
@@ -615,12 +615,12 @@ func Reposition(
 
 	poolSqrtPriceX96 := pl.PoolGetSlot0SqrtPriceX96(position.poolKey)
 
-	prevAddr, prevRealm := getPrev()
+	prevAddr, prevPkgPath := getPrevAsString()
 
 	std.Emit(
 		"Reposition",
 		"prevAddr", prevAddr,
-		"prevRealm", prevRealm,
+		"prevRealm", prevPkgPath,
 		"lpTokenId", ufmt.Sprintf("%d", tokenId),
 		"tickLower", ufmt.Sprintf("%d", tickLower),
 		"tickUpper", ufmt.Sprintf("%d", tickUpper),
@@ -736,12 +736,12 @@ func CollectFee(tokenId uint64, unwrapResult bool) (uint64, string, string, stri
 		}
 	}
 
-	prevAddr, prevRealm := getPrev()
+	prevAddr, prevPkgPath := getPrevAsString()
 
 	std.Emit(
 		"CollectSwapFee",
 		"prevAddr", prevAddr,
-		"prevRealm", prevRealm,
+		"prevRealm", prevPkgPath,
 		"lpTokenId", ufmt.Sprintf("%d", tokenId),
 		"internal_fee0", withoutFee0,
 		"internal_fee1", withoutFee1,

Diff for: position/utils.gno

@@ -6,35 +6,86 @@ import (
 
 	"gno.land/p/demo/ufmt"
 	pusers "gno.land/p/demo/users"
+	"gno.land/r/gnoswap/v1/common"
+	"gno.land/r/gnoswap/v1/consts"
 )
 
-func checkDeadline(deadline int64) {
-	now := time.Now().Unix()
-	if now > deadline {
-		panic(addDetailToError(
-			errExpired,
-			ufmt.Sprintf("utils.gno__checkDeadline() || transaction too old, now(%d) > deadline(%d)", now, deadline),
-		))
-	}
-}
-
+// a2u converts std.Address to pusers.AddressOrName.
+// pusers is a package that contains the user-related functions.
+//
+// Input:
+//   - addr: the address to convert
+//
+// Output:
+//   - pusers.AddressOrName: the converted address
 func a2u(addr std.Address) pusers.AddressOrName {
 	return pusers.AddressOrName(addr)
 }
 
-func prevRealm() string {
-	return std.PrevRealm().PkgPath()
+// derivePkgAddr derives the Realm address from it's pkgpath parameter
+func derivePkgAddr(pkgPath string) std.Address {
+	return std.DerivePkgAddr(pkgPath)
 }
 
-func isUserCall() bool {
-	return std.PrevRealm().IsUser()
+// getOrigPkgAddr returns the original package address.
+// In position contract, original package address is the position address.
+func getOrigPkgAddr() std.Address {
+	return consts.POSITION_ADDR
 }
 
-func getPrev() (string, string) {
+// getPrevRealm returns object of the previous realm.
+func getPrevRealm() std.Realm {
+	return std.PrevRealm()
+}
+
+// getPrevAddr returns the address of the previous realm.
+func getPrevAddr() std.Address {
+	return std.PrevRealm().Addr()
+}
+
+// getPrev returns the address and package path of the previous realm.
+func getPrevAsString() (string, string) {
 	prev := std.PrevRealm()
 	return prev.Addr().String(), prev.PkgPath()
 }
 
+// isUserCall returns true if the caller is a user.
+func isUserCall() bool {
+	return std.PrevRealm().IsUser()
+}
+
+// checkDeadline checks if the deadline is expired.
+// If the deadline is expired, it panics.
+// The deadline is expired if the current time is greater than the deadline.
+// Input:
+//   - deadline: the deadline to check
+func checkDeadline(deadline int64) {
+	now := time.Now().Unix()
+	if now > deadline {
+		panic(newErrorWithDetail(
+			errExpired,
+			ufmt.Sprintf("transaction too old, now(%d) > deadline(%d)", now, deadline),
+		))
+	}
+}
+
+// assertOnlyUserOrStaker panics if the caller is not a user or staker.
+func assertOnlyUserOrStaker(caller std.Realm) {
+	if !caller.IsUser() {
+		if err := common.StakerOnly(caller.Addr()); err != nil {
+			panic(newErrorWithDetail(
+				errNoPermission,
+				ufmt.Sprintf("from (%s)", caller.Addr()),
+			))
+		}
+	}
+}
+
+// assertOnlyNotHalted panics if the contract is halted.
+func assertOnlyNotHalted() {
+	common.IsHalted()
+}
+
 // assertOnlyValidAddress panics if the address is invalid.
 func assertOnlyValidAddress(addr std.Address) {
 	if !addr.IsValid() {
@@ -44,3 +95,17 @@ func assertOnlyValidAddress(addr std.Address) {
 		))
 	}
 }
+
+// assertOnlyValidAddress panics if the address is invalid or previous address is not
+// different from the other address.
+func assertOnlyValidAddressWith(prevAddr, otherAddr std.Address) {
+	assertOnlyValidAddress(prevAddr)
+	assertOnlyValidAddress(otherAddr)
+
+	if prevAddr != otherAddr {
+		panic(newErrorWithDetail(
+			errInvalidAddress,
+			ufmt.Sprintf("(%s, %s)", prevAddr, otherAddr),
+		))
+	}
+}