From ae3c8d68b0dac3836ae26e70a5c9c62f505640a9 Mon Sep 17 00:00:00 2001
From: n3wbie <r3v4@onbloc.xyz>
Date: Wed, 3 Jul 2024 16:42:50 +0900
Subject: [PATCH 1/2] GSW-1144 feat: emission contract that calls gns mint

---
 .../r/demo/emission/_TEST_emission_test.gno   | 69 +++++++++++++++++++
 _deploy/r/demo/emission/emission.gno          | 19 +++++
 _deploy/r/demo/gns_halving/gns.gno            |  9 +++
 3 files changed, 97 insertions(+)
 create mode 100644 _deploy/r/demo/emission/_TEST_emission_test.gno
 create mode 100644 _deploy/r/demo/emission/emission.gno

diff --git a/_deploy/r/demo/emission/_TEST_emission_test.gno b/_deploy/r/demo/emission/_TEST_emission_test.gno
new file mode 100644
index 00000000..3849f95f
--- /dev/null
+++ b/_deploy/r/demo/emission/_TEST_emission_test.gno
@@ -0,0 +1,69 @@
+package emission
+
+import (
+	"std"
+	"testing"
+
+	pusers "gno.land/p/demo/users"
+
+	"gno.land/r/demo/gns"
+)
+
+func TestEmitGns(t *testing.T) {
+	shouldEQ(t, gns.TotalSupply(), 100000000000000) // GSA has
+	shouldEQ(t, gnsBalance(emissionAddr), 0)
+
+	EmitGns() // 1 ~ 123 height
+
+	shouldEQ(t, gnsBalance(emissionAddr), 4387842345)
+	shouldEQ(t, gns.TotalSupply(), 100000000000000+4387842345)
+
+	shouldEQ(t, std.GetHeight(), 123)
+}
+
+func TestEmitGnsSameBlock(t *testing.T) {
+	// request mint again in same block => do not mint again
+	// it may happen because single block can have multiple txs & msgs
+	EmitGns()
+	shouldEQ(t, gns.TotalSupply(), 100000000000000+4387842345)
+}
+
+func TestEmitGnsAllAmount(t *testing.T) {
+	std.TestSkipHeights(75686400 - 1)
+	gns.TestSetLastMintedHeight(std.GetHeight())
+	std.TestSkipHeights(1)
+
+	EmitGns()
+	shouldEQ(t, gns.TotalSupply(), 100000000000000+4387842345+2229594)
+	// all emission duratino has been passed
+
+	std.TestSkipHeights(1)
+	EmitGns() // since all emission has been done, no more minting
+	shouldEQ(t, gns.TotalSupply(), 100000000000000+4387842345+2229594)
+}
+
+// UTILs
+func gnsBalance(addr std.Address) uint64 {
+	a2u := pusers.AddressOrName(addr)
+
+	return gns.BalanceOf(a2u)
+}
+
+func shouldEQ(t *testing.T, got, expected interface{}) {
+	if got != expected {
+		t.Errorf("got %v, expected %v", got, expected)
+	}
+}
+
+func shouldPanicWithMsg(t *testing.T, f func(), msg string) {
+	defer func() {
+		if r := recover(); r == nil {
+			t.Errorf("The code did not panic")
+		} else {
+			if r != msg {
+				t.Errorf("excepted panic(%v), got(%v)", msg, r)
+			}
+		}
+	}()
+	f()
+}
diff --git a/_deploy/r/demo/emission/emission.gno b/_deploy/r/demo/emission/emission.gno
new file mode 100644
index 00000000..ac612431
--- /dev/null
+++ b/_deploy/r/demo/emission/emission.gno
@@ -0,0 +1,19 @@
+package emission
+
+import (
+	"std"
+
+	pusers "gno.land/p/demo/users"
+	"gno.land/r/demo/gnoswap/consts"
+	"gno.land/r/demo/gns"
+)
+
+var emissionAddr std.Address = consts.EMISSION_ADDR
+
+func EmitGns() {
+	gns.Mint(a2u(emissionAddr))
+}
+
+func a2u(addr std.Address) pusers.AddressOrName {
+	return pusers.AddressOrName(addr)
+}
diff --git a/_deploy/r/demo/gns_halving/gns.gno b/_deploy/r/demo/gns_halving/gns.gno
index 3753c96d..fecf52c0 100644
--- a/_deploy/r/demo/gns_halving/gns.gno
+++ b/_deploy/r/demo/gns_halving/gns.gno
@@ -120,3 +120,12 @@ func Mint(address pusers.AddressOrName) {
 		// println("height:", i, "minted:", amount)
 	}
 }
+
+// ONLY FOR EMISSION TESTING, REMOVE THIS FUNCTION IN PRODUCTION
+func TestSetLastMintedHeight(height int64) {
+	caller := std.PrevRealm().Addr()
+	if caller != consts.EMISSION_ADDR {
+		panic("only emission contract can call TestSetLastMintedHeight")
+	}
+	lastMintedHeight = height
+}

From 92eedc4d4a3245e6a9376a75bac78d54e9a5f389 Mon Sep 17 00:00:00 2001
From: n3wbie <r3v4@onbloc.xyz>
Date: Wed, 3 Jul 2024 20:28:30 +0900
Subject: [PATCH 2/2] docs: comments

---
 _deploy/r/demo/emission/emission.gno | 2 ++
 _deploy/r/demo/gns_halving/gns.gno   | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/_deploy/r/demo/emission/emission.gno b/_deploy/r/demo/emission/emission.gno
index ac612431..9b843b70 100644
--- a/_deploy/r/demo/emission/emission.gno
+++ b/_deploy/r/demo/emission/emission.gno
@@ -8,8 +8,10 @@ import (
 	"gno.land/r/demo/gns"
 )
 
+// emissionAddr is the address from which GNS tokens will be emitted.
 var emissionAddr std.Address = consts.EMISSION_ADDR
 
+// EmitGns mints new GNS tokens to the emission address.
 func EmitGns() {
 	gns.Mint(a2u(emissionAddr))
 }
diff --git a/_deploy/r/demo/gns_halving/gns.gno b/_deploy/r/demo/gns_halving/gns.gno
index fecf52c0..ddd9ec1a 100644
--- a/_deploy/r/demo/gns_halving/gns.gno
+++ b/_deploy/r/demo/gns_halving/gns.gno
@@ -121,7 +121,8 @@ func Mint(address pusers.AddressOrName) {
 	}
 }
 
-// ONLY FOR EMISSION TESTING, REMOVE THIS FUNCTION IN PRODUCTION
+// XXX: Remove this
+// ONLY FOR EMISSION TESTING
 func TestSetLastMintedHeight(height int64) {
 	caller := std.PrevRealm().Addr()
 	if caller != consts.EMISSION_ADDR {