diff --git a/docs/reference/stdlibs/std/chain.md b/docs/reference/stdlibs/std/chain.md
index 6a1da6483fd..f3b2c6be0b8 100644
--- a/docs/reference/stdlibs/std/chain.md
+++ b/docs/reference/stdlibs/std/chain.md
@@ -4,18 +4,6 @@ id: chain
 
 # Chain-related
 
-## IsOriginCall
-```go
-func IsOriginCall() bool
-```
-Checks if the caller of the function is an EOA. Returns **true** if caller is an EOA, **false** otherwise.
-
-#### Usage
-```go
-if !std.IsOriginCall() {...}
-```
----
-
 ## AssertOriginCall
 ```go
 func AssertOriginCall()
diff --git a/examples/gno.land/r/demo/banktest/z_3_filetest.gno b/examples/gno.land/r/demo/banktest/z_3_filetest.gno
index 7b6758c3e4f..7bf2aea4f38 100644
--- a/examples/gno.land/r/demo/banktest/z_3_filetest.gno
+++ b/examples/gno.land/r/demo/banktest/z_3_filetest.gno
@@ -18,7 +18,6 @@ func main() {
 	banker := std.GetBanker(std.BankerTypeRealmSend)
 	send := std.Coins{{"ugnot", 123}}
 	banker.SendCoins(banktestAddr, mainaddr, send)
-
 }
 
 // Error:
diff --git a/examples/gno.land/r/demo/boards/public.gno b/examples/gno.land/r/demo/boards/public.gno
index 1d26126fcb2..db545446641 100644
--- a/examples/gno.land/r/demo/boards/public.gno
+++ b/examples/gno.land/r/demo/boards/public.gno
@@ -17,7 +17,7 @@ func GetBoardIDFromName(name string) (BoardID, bool) {
 }
 
 func CreateBoard(name string) BoardID {
-	if !(std.IsOriginCall() || std.PrevRealm().IsUser()) {
+	if !std.PrevRealm().IsUser() {
 		panic("invalid non-user call")
 	}
 	bid := incGetBoardID()
@@ -43,7 +43,7 @@ func checkAnonFee() bool {
 }
 
 func CreateThread(bid BoardID, title string, body string) PostID {
-	if !(std.IsOriginCall() || std.PrevRealm().IsUser()) {
+	if !std.PrevRealm().IsUser() {
 		panic("invalid non-user call")
 	}
 	caller := std.GetOrigCaller()
@@ -61,7 +61,7 @@ func CreateThread(bid BoardID, title string, body string) PostID {
 }
 
 func CreateReply(bid BoardID, threadid, postid PostID, body string) PostID {
-	if !(std.IsOriginCall() || std.PrevRealm().IsUser()) {
+	if !std.PrevRealm().IsUser() {
 		panic("invalid non-user call")
 	}
 	caller := std.GetOrigCaller()
@@ -91,7 +91,7 @@ func CreateReply(bid BoardID, threadid, postid PostID, body string) PostID {
 // If dstBoard is private, does not ping back.
 // If board specified by bid is private, panics.
 func CreateRepost(bid BoardID, postid PostID, title string, body string, dstBoardID BoardID) PostID {
-	if !(std.IsOriginCall() || std.PrevRealm().IsUser()) {
+	if !std.PrevRealm().IsUser() {
 		panic("invalid non-user call")
 	}
 	caller := std.GetOrigCaller()
@@ -121,7 +121,7 @@ func CreateRepost(bid BoardID, postid PostID, title string, body string, dstBoar
 }
 
 func DeletePost(bid BoardID, threadid, postid PostID, reason string) {
-	if !(std.IsOriginCall() || std.PrevRealm().IsUser()) {
+	if !std.PrevRealm().IsUser() {
 		panic("invalid non-user call")
 	}
 	caller := std.GetOrigCaller()
@@ -153,7 +153,7 @@ func DeletePost(bid BoardID, threadid, postid PostID, reason string) {
 }
 
 func EditPost(bid BoardID, threadid, postid PostID, title, body string) {
-	if !(std.IsOriginCall() || std.PrevRealm().IsUser()) {
+	if !std.PrevRealm().IsUser() {
 		panic("invalid non-user call")
 	}
 	caller := std.GetOrigCaller()
diff --git a/examples/gno.land/r/demo/boards/z_0_a_filetest.gno b/examples/gno.land/r/demo/boards/z_0_a_filetest.gno
index 5e8ff520a54..297231970a5 100644
--- a/examples/gno.land/r/demo/boards/z_0_a_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_0_a_filetest.gno
@@ -2,12 +2,17 @@
 package boards_test
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 )
 
 var bid boards.BoardID
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	bid = boards.CreateBoard("test_board")
 	boards.CreateThread(bid, "First Post (title)", "Body of the first post. (body)")
 	pid := boards.CreateThread(bid, "Second Post (title)", "Body of the second post. (body)")
diff --git a/examples/gno.land/r/demo/boards/z_0_b_filetest.gno b/examples/gno.land/r/demo/boards/z_0_b_filetest.gno
index 9bcbe9ffafa..4830161ac71 100644
--- a/examples/gno.land/r/demo/boards/z_0_b_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_0_b_filetest.gno
@@ -4,6 +4,9 @@ package boards_test
 // SEND: 19900000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -11,6 +14,8 @@ import (
 var bid boards.BoardID
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 	bid = boards.CreateBoard("test_board")
 }
diff --git a/examples/gno.land/r/demo/boards/z_0_c_filetest.gno b/examples/gno.land/r/demo/boards/z_0_c_filetest.gno
index 99fd339aed8..d0b0930240d 100644
--- a/examples/gno.land/r/demo/boards/z_0_c_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_0_c_filetest.gno
@@ -4,6 +4,9 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -11,6 +14,8 @@ import (
 var bid boards.BoardID
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 	boards.CreateThread(1, "First Post (title)", "Body of the first post. (body)")
 }
diff --git a/examples/gno.land/r/demo/boards/z_0_d_filetest.gno b/examples/gno.land/r/demo/boards/z_0_d_filetest.gno
index c77e60e3f3a..7e21f83febd 100644
--- a/examples/gno.land/r/demo/boards/z_0_d_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_0_d_filetest.gno
@@ -4,6 +4,9 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -11,6 +14,8 @@ import (
 var bid boards.BoardID
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 	bid = boards.CreateBoard("test_board")
 	boards.CreateReply(bid, 0, 0, "Reply of the second post")
diff --git a/examples/gno.land/r/demo/boards/z_0_e_filetest.gno b/examples/gno.land/r/demo/boards/z_0_e_filetest.gno
index 6db036e87ba..bdf6d63727b 100644
--- a/examples/gno.land/r/demo/boards/z_0_e_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_0_e_filetest.gno
@@ -4,6 +4,9 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -11,6 +14,8 @@ import (
 var bid boards.BoardID
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 	boards.CreateReply(bid, 0, 0, "Reply of the second post")
 }
diff --git a/examples/gno.land/r/demo/boards/z_0_filetest.gno b/examples/gno.land/r/demo/boards/z_0_filetest.gno
index a649895cb01..977c00e84a6 100644
--- a/examples/gno.land/r/demo/boards/z_0_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_0_filetest.gno
@@ -4,6 +4,9 @@ package boards_test
 // SEND: 20000000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -11,6 +14,8 @@ import (
 var bid boards.BoardID
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
diff --git a/examples/gno.land/r/demo/boards/z_10_a_filetest.gno b/examples/gno.land/r/demo/boards/z_10_a_filetest.gno
index ad57283bfcf..fc04555bf39 100644
--- a/examples/gno.land/r/demo/boards/z_10_a_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_10_a_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -16,6 +18,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -23,6 +27,8 @@ func init() {
 }
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
 	// boardId 2 not exist
 	boards.DeletePost(2, pid, pid, "")
diff --git a/examples/gno.land/r/demo/boards/z_10_b_filetest.gno b/examples/gno.land/r/demo/boards/z_10_b_filetest.gno
index cf8a332174f..2353268ef54 100644
--- a/examples/gno.land/r/demo/boards/z_10_b_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_10_b_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -16,6 +18,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -25,6 +29,8 @@ func init() {
 func main() {
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
 	// pid of 2 not exist
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	boards.DeletePost(bid, 2, 2, "")
 	println("----------------------------------------------------")
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
diff --git a/examples/gno.land/r/demo/boards/z_10_c_filetest.gno b/examples/gno.land/r/demo/boards/z_10_c_filetest.gno
index 7dd460500d6..c735213b09c 100644
--- a/examples/gno.land/r/demo/boards/z_10_c_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_10_c_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -17,6 +19,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -26,6 +30,8 @@ func init() {
 
 func main() {
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	boards.DeletePost(bid, pid, rid, "")
 	println("----------------------------------------------------")
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
diff --git a/examples/gno.land/r/demo/boards/z_10_filetest.gno b/examples/gno.land/r/demo/boards/z_10_filetest.gno
index 8a6d11c79cf..e9324cec555 100644
--- a/examples/gno.land/r/demo/boards/z_10_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_10_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -16,6 +18,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -23,6 +27,8 @@ func init() {
 }
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
 	boards.DeletePost(bid, pid, pid, "")
 	println("----------------------------------------------------")
diff --git a/examples/gno.land/r/demo/boards/z_11_a_filetest.gno b/examples/gno.land/r/demo/boards/z_11_a_filetest.gno
index d7dc7b90782..b891e395fe6 100644
--- a/examples/gno.land/r/demo/boards/z_11_a_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_11_a_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -16,6 +18,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -25,6 +29,8 @@ func init() {
 func main() {
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
 	// board 2 not exist
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	boards.EditPost(2, pid, pid, "Edited: First Post in (title)", "Edited: Body of the first post. (body)")
 	println("----------------------------------------------------")
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
diff --git a/examples/gno.land/r/demo/boards/z_11_b_filetest.gno b/examples/gno.land/r/demo/boards/z_11_b_filetest.gno
index 3aa28095502..9322ac191c5 100644
--- a/examples/gno.land/r/demo/boards/z_11_b_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_11_b_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -16,6 +18,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -25,6 +29,8 @@ func init() {
 func main() {
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
 	// thread 2 not exist
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	boards.EditPost(bid, 2, pid, "Edited: First Post in (title)", "Edited: Body of the first post. (body)")
 	println("----------------------------------------------------")
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
diff --git a/examples/gno.land/r/demo/boards/z_11_c_filetest.gno b/examples/gno.land/r/demo/boards/z_11_c_filetest.gno
index df764303562..de4f828c1ca 100644
--- a/examples/gno.land/r/demo/boards/z_11_c_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_11_c_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -16,6 +18,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -25,6 +29,8 @@ func init() {
 func main() {
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
 	// post 2 not exist
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	boards.EditPost(bid, pid, 2, "Edited: First Post in (title)", "Edited: Body of the first post. (body)")
 	println("----------------------------------------------------")
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
diff --git a/examples/gno.land/r/demo/boards/z_11_d_filetest.gno b/examples/gno.land/r/demo/boards/z_11_d_filetest.gno
index f64b4c84bba..b5619f86c5b 100644
--- a/examples/gno.land/r/demo/boards/z_11_d_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_11_d_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -17,6 +19,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -26,6 +30,8 @@ func init() {
 
 func main() {
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	boards.EditPost(bid, pid, rid, "", "Edited: First reply of the First post\n")
 	println("----------------------------------------------------")
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
diff --git a/examples/gno.land/r/demo/boards/z_11_filetest.gno b/examples/gno.land/r/demo/boards/z_11_filetest.gno
index 3f56293b3bd..1a013d5db22 100644
--- a/examples/gno.land/r/demo/boards/z_11_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_11_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -16,6 +18,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -24,6 +28,8 @@ func init() {
 
 func main() {
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	boards.EditPost(bid, pid, pid, "Edited: First Post in (title)", "Edited: Body of the first post. (body)")
 	println("----------------------------------------------------")
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
diff --git a/examples/gno.land/r/demo/boards/z_12_a_filetest.gno b/examples/gno.land/r/demo/boards/z_12_a_filetest.gno
index 909be880efa..380e9bc09e0 100644
--- a/examples/gno.land/r/demo/boards/z_12_a_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_12_a_filetest.gno
@@ -12,6 +12,8 @@ import (
 )
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 	// create a post via registered user
 	bid1 := boards.CreateBoard("test_board1")
diff --git a/examples/gno.land/r/demo/boards/z_12_b_filetest.gno b/examples/gno.land/r/demo/boards/z_12_b_filetest.gno
index 6b2166895c0..553108df9b3 100644
--- a/examples/gno.land/r/demo/boards/z_12_b_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_12_b_filetest.gno
@@ -4,11 +4,16 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 	bid1 := boards.CreateBoard("test_board1")
 	pid := boards.CreateThread(bid1, "First Post (title)", "Body of the first post. (body)")
diff --git a/examples/gno.land/r/demo/boards/z_12_c_filetest.gno b/examples/gno.land/r/demo/boards/z_12_c_filetest.gno
index 7397c487d7d..3b2e7ec04c0 100644
--- a/examples/gno.land/r/demo/boards/z_12_c_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_12_c_filetest.gno
@@ -4,11 +4,16 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 	bid1 := boards.CreateBoard("test_board1")
 	boards.CreateThread(bid1, "First Post (title)", "Body of the first post. (body)")
diff --git a/examples/gno.land/r/demo/boards/z_12_d_filetest.gno b/examples/gno.land/r/demo/boards/z_12_d_filetest.gno
index 37b6473f7ac..20818b05c0f 100644
--- a/examples/gno.land/r/demo/boards/z_12_d_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_12_d_filetest.gno
@@ -4,11 +4,16 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 	bid1 := boards.CreateBoard("test_board1")
 	pid := boards.CreateThread(bid1, "First Post (title)", "Body of the first post. (body)")
diff --git a/examples/gno.land/r/demo/boards/z_12_filetest.gno b/examples/gno.land/r/demo/boards/z_12_filetest.gno
index ac4adf6ee7b..fe7b58e9348 100644
--- a/examples/gno.land/r/demo/boards/z_12_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_12_filetest.gno
@@ -4,6 +4,9 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -15,6 +18,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid1 = boards.CreateBoard("test_board1")
@@ -23,6 +28,8 @@ func init() {
 }
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	rid := boards.CreateRepost(bid1, pid, "", "Check this out", bid2)
 	println(rid)
 	println(boards.Render("test_board2"))
diff --git a/examples/gno.land/r/demo/boards/z_1_filetest.gno b/examples/gno.land/r/demo/boards/z_1_filetest.gno
index 4d46c81b83d..6db254c661d 100644
--- a/examples/gno.land/r/demo/boards/z_1_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_1_filetest.gno
@@ -4,6 +4,9 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -11,6 +14,8 @@ import (
 var board *boards.Board
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	_ = boards.CreateBoard("test_board_1")
diff --git a/examples/gno.land/r/demo/boards/z_2_filetest.gno b/examples/gno.land/r/demo/boards/z_2_filetest.gno
index 31b39644b24..0457a0b6b42 100644
--- a/examples/gno.land/r/demo/boards/z_2_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_2_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -16,6 +18,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
diff --git a/examples/gno.land/r/demo/boards/z_3_filetest.gno b/examples/gno.land/r/demo/boards/z_3_filetest.gno
index 0b2a2df2f91..cffeb9bc29e 100644
--- a/examples/gno.land/r/demo/boards/z_3_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_3_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -16,6 +18,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -24,6 +28,8 @@ func init() {
 }
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	rid := boards.CreateReply(bid, pid, pid, "Reply of the second post")
 	println(rid)
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
diff --git a/examples/gno.land/r/demo/boards/z_4_filetest.gno b/examples/gno.land/r/demo/boards/z_4_filetest.gno
index b781e94e4db..f834f4bc248 100644
--- a/examples/gno.land/r/demo/boards/z_4_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_4_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -16,6 +18,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -26,6 +30,8 @@ func init() {
 }
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	rid2 := boards.CreateReply(bid, pid, pid, "Second reply of the second post")
 	println(rid2)
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
diff --git a/examples/gno.land/r/demo/boards/z_5_b_filetest.gno b/examples/gno.land/r/demo/boards/z_5_b_filetest.gno
index e79da5c3677..0ad15ca2600 100644
--- a/examples/gno.land/r/demo/boards/z_5_b_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_5_b_filetest.gno
@@ -14,6 +14,8 @@ import (
 const admin = std.Address("g1us8428u2a5satrlxzagqqa5m6vmuze025anjlj")
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 	// create board via registered user
 	bid := boards.CreateBoard("test_board")
diff --git a/examples/gno.land/r/demo/boards/z_5_c_filetest.gno b/examples/gno.land/r/demo/boards/z_5_c_filetest.gno
index 723e6a10204..3817595fb98 100644
--- a/examples/gno.land/r/demo/boards/z_5_c_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_5_c_filetest.gno
@@ -14,6 +14,8 @@ import (
 const admin = std.Address("g1us8428u2a5satrlxzagqqa5m6vmuze025anjlj")
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 	// create board via registered user
 	bid := boards.CreateBoard("test_board")
diff --git a/examples/gno.land/r/demo/boards/z_5_d_filetest.gno b/examples/gno.land/r/demo/boards/z_5_d_filetest.gno
index 54cfe49eec6..33175efd4f2 100644
--- a/examples/gno.land/r/demo/boards/z_5_d_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_5_d_filetest.gno
@@ -14,6 +14,8 @@ import (
 const admin = std.Address("g1us8428u2a5satrlxzagqqa5m6vmuze025anjlj")
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 	// create board via registered user
 	bid := boards.CreateBoard("test_board")
diff --git a/examples/gno.land/r/demo/boards/z_5_filetest.gno b/examples/gno.land/r/demo/boards/z_5_filetest.gno
index 712af483891..c5f33c497fd 100644
--- a/examples/gno.land/r/demo/boards/z_5_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_5_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -16,6 +18,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -25,6 +29,8 @@ func init() {
 }
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	rid2 := boards.CreateReply(bid, pid, pid, "Second reply of the second post\n")
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
 }
diff --git a/examples/gno.land/r/demo/boards/z_6_filetest.gno b/examples/gno.land/r/demo/boards/z_6_filetest.gno
index ec40cf5f8e9..98bef7091b4 100644
--- a/examples/gno.land/r/demo/boards/z_6_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_6_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -17,6 +19,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -26,6 +30,8 @@ func init() {
 }
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	boards.CreateReply(bid, pid, pid, "Second reply of the second post\n")
 	boards.CreateReply(bid, pid, rid, "First reply of the first reply\n")
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid))))
diff --git a/examples/gno.land/r/demo/boards/z_7_filetest.gno b/examples/gno.land/r/demo/boards/z_7_filetest.gno
index 353b84f6d87..d587447b193 100644
--- a/examples/gno.land/r/demo/boards/z_7_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_7_filetest.gno
@@ -4,11 +4,16 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	// register
 	users.Register("", "gnouser", "my profile")
 
diff --git a/examples/gno.land/r/demo/boards/z_8_filetest.gno b/examples/gno.land/r/demo/boards/z_8_filetest.gno
index 4896dfcfccf..33edb30a391 100644
--- a/examples/gno.land/r/demo/boards/z_8_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_8_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -17,6 +19,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	bid = boards.CreateBoard("test_board")
@@ -26,6 +30,8 @@ func init() {
 }
 
 func main() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	boards.CreateReply(bid, pid, pid, "Second reply of the second post\n")
 	rid2 := boards.CreateReply(bid, pid, rid, "First reply of the first reply\n")
 	println(boards.Render("test_board/" + strconv.Itoa(int(pid)) + "/" + strconv.Itoa(int(rid2))))
diff --git a/examples/gno.land/r/demo/boards/z_9_a_filetest.gno b/examples/gno.land/r/demo/boards/z_9_a_filetest.gno
index 8d07ba0e710..79f68f20200 100644
--- a/examples/gno.land/r/demo/boards/z_9_a_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_9_a_filetest.gno
@@ -4,6 +4,9 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -11,6 +14,8 @@ import (
 var dstBoard boards.BoardID
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	dstBoard = boards.CreateBoard("dst_board")
diff --git a/examples/gno.land/r/demo/boards/z_9_b_filetest.gno b/examples/gno.land/r/demo/boards/z_9_b_filetest.gno
index 68daf770b4f..703557cf476 100644
--- a/examples/gno.land/r/demo/boards/z_9_b_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_9_b_filetest.gno
@@ -4,6 +4,9 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
+
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -14,6 +17,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	srcBoard = boards.CreateBoard("first_board")
diff --git a/examples/gno.land/r/demo/boards/z_9_filetest.gno b/examples/gno.land/r/demo/boards/z_9_filetest.gno
index ca37e306bda..d7f8adeda30 100644
--- a/examples/gno.land/r/demo/boards/z_9_filetest.gno
+++ b/examples/gno.land/r/demo/boards/z_9_filetest.gno
@@ -4,8 +4,10 @@ package boards_test
 // SEND: 200000000ugnot
 
 import (
+	"std"
 	"strconv"
 
+	"gno.land/p/demo/testutils"
 	"gno.land/r/demo/boards"
 	"gno.land/r/demo/users"
 )
@@ -17,6 +19,8 @@ var (
 )
 
 func init() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
 	users.Register("", "gnouser", "my profile")
 
 	firstBoard = boards.CreateBoard("first_board")
diff --git a/examples/gno.land/r/demo/tests/subtests/subtests.gno b/examples/gno.land/r/demo/tests/subtests/subtests.gno
index 6bf43cba5eb..5043c704017 100644
--- a/examples/gno.land/r/demo/tests/subtests/subtests.gno
+++ b/examples/gno.land/r/demo/tests/subtests/subtests.gno
@@ -21,5 +21,5 @@ func CallAssertOriginCall() {
 }
 
 func CallIsOriginCall() bool {
-	return std.IsOriginCall()
+	return std.PrevRealm().IsUser()
 }
diff --git a/examples/gno.land/r/demo/tests/tests.gno b/examples/gno.land/r/demo/tests/tests.gno
index e7fde94ea08..cdeea62de66 100644
--- a/examples/gno.land/r/demo/tests/tests.gno
+++ b/examples/gno.land/r/demo/tests/tests.gno
@@ -32,7 +32,7 @@ func CallAssertOriginCall() {
 }
 
 func CallIsOriginCall() bool {
-	return std.IsOriginCall()
+	return std.PrevRealm().IsUser()
 }
 
 func CallSubtestsAssertOriginCall() {
diff --git a/examples/gno.land/r/demo/tests/tests_test.gno b/examples/gno.land/r/demo/tests/tests_test.gno
index ccbc6b91265..fa3872744c8 100644
--- a/examples/gno.land/r/demo/tests/tests_test.gno
+++ b/examples/gno.land/r/demo/tests/tests_test.gno
@@ -1,17 +1,23 @@
-package tests
+package tests_test
 
 import (
 	"std"
 	"testing"
+
+	"gno.land/p/demo/testutils"
+	"gno.land/r/demo/tests"
 )
 
 func TestAssertOriginCall(t *testing.T) {
 	// CallAssertOriginCall(): no panic
-	CallAssertOriginCall()
-	if !CallIsOriginCall() {
+	caller := testutils.TestAddress("caller")
+	std.TestSetRealm(std.NewUserRealm(caller))
+	tests.CallAssertOriginCall()
+	if !tests.CallIsOriginCall() {
 		t.Errorf("expected IsOriginCall=true but got false")
 	}
 
+	std.TestSetRealm(std.NewCodeRealm("gno.land/r/demo/tests"))
 	// CallAssertOriginCall() from a block: panic
 	expectedReason := "invalid non-origin call"
 	func() {
@@ -23,10 +29,10 @@ func TestAssertOriginCall(t *testing.T) {
 		}()
 		// if called inside a function literal, this is no longer an origin call
 		// because there's one additional frame (the function literal block).
-		if CallIsOriginCall() {
+		if tests.CallIsOriginCall() {
 			t.Errorf("expected IsOriginCall=false but got true")
 		}
-		CallAssertOriginCall()
+		tests.CallAssertOriginCall()
 	}()
 
 	// CallSubtestsAssertOriginCall(): panic
@@ -36,23 +42,24 @@ func TestAssertOriginCall(t *testing.T) {
 			t.Errorf("expected panic with '%v', got '%v'", expectedReason, r)
 		}
 	}()
-	if CallSubtestsIsOriginCall() {
+	if tests.CallSubtestsIsOriginCall() {
 		t.Errorf("expected IsOriginCall=false but got true")
 	}
-	CallSubtestsAssertOriginCall()
+	tests.CallSubtestsAssertOriginCall()
 }
 
 func TestPrevRealm(t *testing.T) {
 	var (
-		user1Addr  = std.DerivePkgAddr("user1.gno")
+		firstRealm = std.DerivePkgAddr("gno.land/r/demo/tests_test")
 		rTestsAddr = std.DerivePkgAddr("gno.land/r/demo/tests")
 	)
-	// When a single realm in the frames, PrevRealm returns the user
-	if addr := GetPrevRealm().Addr(); addr != user1Addr {
-		t.Errorf("want GetPrevRealm().Addr==%s, got %s", user1Addr, addr)
+	// When only one realm in the frames, PrevRealm returns the same realm
+	if addr := tests.GetPrevRealm().Addr(); addr != firstRealm {
+		println(tests.GetPrevRealm())
+		t.Errorf("want GetPrevRealm().Addr==%s, got %s", firstRealm, addr)
 	}
 	// When 2 or more realms in the frames, PrevRealm returns the second to last
-	if addr := GetRSubtestsPrevRealm().Addr(); addr != rTestsAddr {
+	if addr := tests.GetRSubtestsPrevRealm().Addr(); addr != rTestsAddr {
 		t.Errorf("want GetRSubtestsPrevRealm().Addr==%s, got %s", rTestsAddr, addr)
 	}
 }
diff --git a/examples/gno.land/r/demo/users/z_11_filetest.gno b/examples/gno.land/r/demo/users/z_11_filetest.gno
index 27c7e9813da..212dc169007 100644
--- a/examples/gno.land/r/demo/users/z_11_filetest.gno
+++ b/examples/gno.land/r/demo/users/z_11_filetest.gno
@@ -11,8 +11,8 @@ import (
 const admin = std.Address("g1manfred47kzduec920z88wfr64ylksmdcedlf5")
 
 func main() {
-	caller := std.GetOrigCaller() // main
 	std.TestSetOrigCaller(admin)
+	caller := std.GetOrigCaller() // main
 	users.AdminAddRestrictedName("superrestricted")
 
 	// test restricted name
diff --git a/examples/gno.land/r/demo/users/z_11b_filetest.gno b/examples/gno.land/r/demo/users/z_11b_filetest.gno
index be508963911..6041f4b7113 100644
--- a/examples/gno.land/r/demo/users/z_11b_filetest.gno
+++ b/examples/gno.land/r/demo/users/z_11b_filetest.gno
@@ -11,8 +11,8 @@ import (
 const admin = std.Address("g1manfred47kzduec920z88wfr64ylksmdcedlf5")
 
 func main() {
-	caller := std.GetOrigCaller() // main
 	std.TestSetOrigCaller(admin)
+	caller := std.GetOrigCaller() // main
 	// add restricted name
 	users.AdminAddRestrictedName("superrestricted")
 	// grant invite to caller
diff --git a/examples/gno.land/r/demo/users/z_5_filetest.gno b/examples/gno.land/r/demo/users/z_5_filetest.gno
index 6465cc9c378..9080b509b8e 100644
--- a/examples/gno.land/r/demo/users/z_5_filetest.gno
+++ b/examples/gno.land/r/demo/users/z_5_filetest.gno
@@ -16,14 +16,17 @@ func main() {
 	users.Register("", "gnouser", "my profile")
 	// as admin, grant invites to gnouser
 	std.TestSetOrigCaller(admin)
+	std.TestSetRealm(std.NewUserRealm(admin))
 	users.GrantInvites(caller.String() + ":1")
 	// switch back to caller
 	std.TestSetOrigCaller(caller)
+	std.TestSetRealm(std.NewUserRealm(caller))
 	// invite another addr
 	test1 := testutils.TestAddress("test1")
 	users.Invite(test1.String())
 	// switch to test1
 	std.TestSetOrigCaller(test1)
+	std.TestSetRealm(std.NewUserRealm(test1))
 	std.TestSetOrigSend(std.Coins{{"dontcare", 1}}, nil)
 	users.Register(caller, "satoshi", "my other profile")
 	println(users.Render(""))
diff --git a/examples/gno.land/r/demo/users/z_6_filetest.gno b/examples/gno.land/r/demo/users/z_6_filetest.gno
index 919088088a2..e6a63d83358 100644
--- a/examples/gno.land/r/demo/users/z_6_filetest.gno
+++ b/examples/gno.land/r/demo/users/z_6_filetest.gno
@@ -9,7 +9,7 @@ import (
 const admin = std.Address("g1manfred47kzduec920z88wfr64ylksmdcedlf5")
 
 func main() {
-	caller := std.GetOrigCaller()
+	caller := std.GetOrigCaller() // main
 	// as admin, grant invites to unregistered user.
 	std.TestSetOrigCaller(admin)
 	users.GrantInvites(caller.String() + ":1")
diff --git a/gnovm/cmd/gno/testdata/transpile/valid_transpile_file.txtar b/gnovm/cmd/gno/testdata/transpile/valid_transpile_file.txtar
index 86cc6f12f7a..b79e7f9a0bc 100644
--- a/gnovm/cmd/gno/testdata/transpile/valid_transpile_file.txtar
+++ b/gnovm/cmd/gno/testdata/transpile/valid_transpile_file.txtar
@@ -36,7 +36,7 @@ package main
 import "std"
 
 func hello() {
-	std.AssertOriginCall()
+	std.GetChainID()
 }
 
 -- main.gno.gen.go.golden --
@@ -61,5 +61,5 @@ package main
 import "github.com/gnolang/gno/gnovm/stdlibs/std"
 
 func hello() {
-	std.AssertOriginCall(nil)
+	std.GetChainID(nil)
 }
diff --git a/gnovm/pkg/transpiler/transpiler_test.go b/gnovm/pkg/transpiler/transpiler_test.go
index 2a0707f7f79..63b77e49446 100644
--- a/gnovm/pkg/transpiler/transpiler_test.go
+++ b/gnovm/pkg/transpiler/transpiler_test.go
@@ -344,13 +344,13 @@ func Float32bits(i float32) uint32
 
 func testfunc() {
 	println(Float32bits(3.14159))
-	std.AssertOriginCall()
+	std.GetChainID()
 }
 
 func otherFunc() {
 	std := 1
 	// This is (incorrectly) changed for now.
-	std.AssertOriginCall()
+	std.GetChainID()
 }
 `,
 			expectedOutput: `
@@ -363,13 +363,13 @@ import "github.com/gnolang/gno/gnovm/stdlibs/std"
 
 func testfunc() {
 	println(Float32bits(3.14159))
-	std.AssertOriginCall(nil)
+	std.GetChainID(nil)
 }
 
 func otherFunc() {
 	std := 1
 	// This is (incorrectly) changed for now.
-	std.AssertOriginCall(nil)
+	std.GetChainID(nil)
 }
 `,
 			expectedImports: []*ast.ImportSpec{
@@ -388,11 +388,11 @@ func otherFunc() {
 			source: `
 package std
 
-func AssertOriginCall()
+func GetChainID()
 func origCaller() string
 
 func testfunc() {
-	AssertOriginCall()
+	GetChainID()
 	println(origCaller())
 }
 `,
@@ -403,7 +403,7 @@ func testfunc() {
 package std
 
 func testfunc() {
-	AssertOriginCall(nil)
+	GetChainID(nil)
 	println(X_origCaller(nil))
 }
 `,
diff --git a/gnovm/stdlibs/generated.go b/gnovm/stdlibs/generated.go
index ab35fc6b6bf..12c55d5ffa0 100644
--- a/gnovm/stdlibs/generated.go
+++ b/gnovm/stdlibs/generated.go
@@ -428,26 +428,6 @@ var nativeFuncs = [...]NativeFunc{
 			)
 		},
 	},
-	{
-		"std",
-		"IsOriginCall",
-		[]gno.FieldTypeExpr{},
-		[]gno.FieldTypeExpr{
-			{Name: gno.N("r0"), Type: gno.X("bool")},
-		},
-		true,
-		func(m *gno.Machine) {
-			r0 := libs_std.IsOriginCall(
-				m,
-			)
-
-			m.PushValue(gno.Go2GnoValue(
-				m.Alloc,
-				m.Store,
-				reflect.ValueOf(&r0).Elem(),
-			))
-		},
-	},
 	{
 		"std",
 		"GetChainID",
diff --git a/gnovm/stdlibs/std/native.gno b/gnovm/stdlibs/std/native.gno
index 9cf8808a07e..2baa1f92f48 100644
--- a/gnovm/stdlibs/std/native.gno
+++ b/gnovm/stdlibs/std/native.gno
@@ -1,15 +1,11 @@
 package std
 
-// AssertOriginCall panics if [IsOriginCall] returns false.
-func AssertOriginCall() // injected
-
-// IsOriginCall returns true only if the calling method is invoked via a direct
-// MsgCall. It returns false for all other cases, like if the calling method
+// AssertOriginCall panics if the calling method is not invoked via a direct
+// MsgCall. It panics for for other cases, like if the calling method
 // is invoked by another method (even from the same realm or package).
-// It also returns false every time when the transaction is broadcasted via
+// It also panic every time when the transaction is broadcasted via
 // MsgRun.
-func IsOriginCall() bool // injected
-
+func AssertOriginCall()      // injected
 func GetChainID() string     // injected
 func GetChainDomain() string // injected
 func GetHeight() int64       // injected
diff --git a/gnovm/stdlibs/std/native.go b/gnovm/stdlibs/std/native.go
index 9e398e907a2..68f4542f689 100644
--- a/gnovm/stdlibs/std/native.go
+++ b/gnovm/stdlibs/std/native.go
@@ -7,12 +7,12 @@ import (
 )
 
 func AssertOriginCall(m *gno.Machine) {
-	if !IsOriginCall(m) {
+	if !isOriginCall(m) {
 		m.Panic(typedString("invalid non-origin call"))
 	}
 }
 
-func IsOriginCall(m *gno.Machine) bool {
+func isOriginCall(m *gno.Machine) bool {
 	n := m.NumFrames()
 	if n == 0 {
 		return false
diff --git a/gnovm/stdlibs/std/native_test.go b/gnovm/stdlibs/std/native_test.go
index 851785575d7..acbd22055d6 100644
--- a/gnovm/stdlibs/std/native_test.go
+++ b/gnovm/stdlibs/std/native_test.go
@@ -184,7 +184,7 @@ func TestPrevRealmIsOrigin(t *testing.T) {
 			assert := assert.New(t)
 
 			addr, pkgPath := X_getRealm(tt.machine, 1)
-			isOrigin := IsOriginCall(tt.machine)
+			isOrigin := isOriginCall(tt.machine)
 
 			assert.Equal(string(tt.expectedAddr), addr)
 			assert.Equal(tt.expectedPkgPath, pkgPath)
diff --git a/gnovm/tests/files/std5.gno b/gnovm/tests/files/std5.gno
index 2f9e98bb4ec..1f1d013c3df 100644
--- a/gnovm/tests/files/std5.gno
+++ b/gnovm/tests/files/std5.gno
@@ -13,10 +13,10 @@ func main() {
 
 // Stacktrace:
 // panic: frame not found
-// callerAt<VPBlock(3,53)>(n<VPBlock(1,0)>)
+// callerAt<VPBlock(3,52)>(n<VPBlock(1,0)>)
 //     gonative:std.callerAt
 // std<VPBlock(2,0)>.GetCallerAt(2)
-//     std/native.gno:45
+//     std/native.gno:41
 // main<VPBlock(1,0)>()
 //     main/files/std5.gno:10
 
diff --git a/gnovm/tests/files/std8.gno b/gnovm/tests/files/std8.gno
index dfc2b8ca5fd..3d0e4a7085e 100644
--- a/gnovm/tests/files/std8.gno
+++ b/gnovm/tests/files/std8.gno
@@ -23,10 +23,10 @@ func main() {
 
 // Stacktrace:
 // panic: frame not found
-// callerAt<VPBlock(3,53)>(n<VPBlock(1,0)>)
+// callerAt<VPBlock(3,52)>(n<VPBlock(1,0)>)
 //     gonative:std.callerAt
 // std<VPBlock(2,0)>.GetCallerAt(4)
-//     std/native.gno:45
+//     std/native.gno:41
 // fn<VPBlock(1,0)>()
 //     main/files/std8.gno:16
 // testutils<VPBlock(2,1)>.WrapCall(inner<VPBlock(3,0)>)
diff --git a/gnovm/tests/stdlibs/generated.go b/gnovm/tests/stdlibs/generated.go
index db5ecdec05d..51b15d77eef 100644
--- a/gnovm/tests/stdlibs/generated.go
+++ b/gnovm/tests/stdlibs/generated.go
@@ -43,26 +43,6 @@ var nativeFuncs = [...]NativeFunc{
 			)
 		},
 	},
-	{
-		"std",
-		"IsOriginCall",
-		[]gno.FieldTypeExpr{},
-		[]gno.FieldTypeExpr{
-			{Name: gno.N("r0"), Type: gno.X("bool")},
-		},
-		true,
-		func(m *gno.Machine) {
-			r0 := testlibs_std.IsOriginCall(
-				m,
-			)
-
-			m.PushValue(gno.Go2GnoValue(
-				m.Alloc,
-				m.Store,
-				reflect.ValueOf(&r0).Elem(),
-			))
-		},
-	},
 	{
 		"std",
 		"TestSkipHeights",
diff --git a/gnovm/tests/stdlibs/std/std.gno b/gnovm/tests/stdlibs/std/std.gno
index dcb5a64dbb3..c30071313fe 100644
--- a/gnovm/tests/stdlibs/std/std.gno
+++ b/gnovm/tests/stdlibs/std/std.gno
@@ -1,7 +1,6 @@
 package std
 
 func AssertOriginCall()           // injected
-func IsOriginCall() bool          // injected
 func TestSkipHeights(count int64) // injected
 
 func TestSetOrigCaller(addr Address)  { testSetOrigCaller(string(addr)) }
diff --git a/gnovm/tests/stdlibs/std/std.go b/gnovm/tests/stdlibs/std/std.go
index 675194b252f..eac51c5fb0e 100644
--- a/gnovm/tests/stdlibs/std/std.go
+++ b/gnovm/tests/stdlibs/std/std.go
@@ -26,7 +26,7 @@ type RealmOverride struct {
 }
 
 func AssertOriginCall(m *gno.Machine) {
-	if !IsOriginCall(m) {
+	if !isOriginCall(m) {
 		m.Panic(typedString("invalid non-origin call"))
 	}
 }
@@ -37,7 +37,7 @@ func typedString(s gno.StringValue) gno.TypedValue {
 	return tv
 }
 
-func IsOriginCall(m *gno.Machine) bool {
+func isOriginCall(m *gno.Machine) bool {
 	tname := m.Frames[0].Func.Name
 	switch tname {
 	case "main": // test is a _filetest