GSW-1037 apply emit event in contract

__local/grc20_tokens/bar/bar.gno

@@ -13,12 +13,12 @@ import (
 
 var (
 	bar   *grc20.AdminToken
-	admin std.Address = "g13f63ua8uhmuf9mgc0x8zfz04yrsaqh7j78vcgq" // TODO: helper to change admin
+	admin std.Address = "g13f63ua8uhmuf9mgc0x8zfz04yrsaqh7j78vcgq"
 )
 
 func init() {
 	bar = grc20.NewAdminToken("Bar", "BAR", 6)
-	bar.Mint(admin, 500_000_000_000_000)
+	bar.Mint(admin, 100_000_000_000_000)
 }
 
 // method proxies as public functions.
@@ -72,29 +72,6 @@ func TransferFrom(from, to pusers.AddressOrName, amount uint64) {
 	}
 }
 
-// faucet.
-
-func Faucet() {
-	// FIXME: add limits?
-	// FIXME: add payment in gnot?
-	caller := std.PrevRealm().Addr()
-	err := bar.Mint(caller, 100*1_000_000) // 100M
-	if err != nil {
-		panic(err.Error())
-	}
-}
-
-// administration.
-
-func Mint(address pusers.AddressOrName, amount uint64) {
-	caller := std.PrevRealm().Addr()
-	assertIsAdmin(caller)
-	err := bar.Mint(users.Resolve(address), amount)
-	if err != nil {
-		panic(err.Error())
-	}
-}
-
 func Burn(address pusers.AddressOrName, amount uint64) {
 	caller := std.PrevRealm().Addr()
 	assertIsAdmin(caller)

__local/grc20_tokens/baz/baz.gno

@@ -13,12 +13,12 @@ import (
 
 var (
 	baz   *grc20.AdminToken
-	admin std.Address = "g13f63ua8uhmuf9mgc0x8zfz04yrsaqh7j78vcgq" // TODO: helper to change admin
+	admin std.Address = "g13f63ua8uhmuf9mgc0x8zfz04yrsaqh7j78vcgq"
 )
 
 func init() {
 	baz = grc20.NewAdminToken("Baz", "BAZ", 6)
-	baz.Mint(admin, 500_000_000_000_000)
+	baz.Mint(admin, 100_000_000_000_000)
 }
 
 // method proxies as public functions.
@@ -72,29 +72,6 @@ func TransferFrom(from, to pusers.AddressOrName, amount uint64) {
 	}
 }
 
-// faucet.
-
-func Faucet() {
-	// FIXME: add limits?
-	// FIXME: add payment in gnot?
-	caller := std.PrevRealm().Addr()
-	err := baz.Mint(caller, 100*1_000_000) // 100M
-	if err != nil {
-		panic(err.Error())
-	}
-}
-
-// administration.
-
-func Mint(address pusers.AddressOrName, amount uint64) {
-	caller := std.PrevRealm().Addr()
-	assertIsAdmin(caller)
-	err := baz.Mint(users.Resolve(address), amount)
-	if err != nil {
-		panic(err.Error())
-	}
-}
-
 func Burn(address pusers.AddressOrName, amount uint64) {
 	caller := std.PrevRealm().Addr()
 	assertIsAdmin(caller)

__local/grc20_tokens/foo/foo.gno

@@ -13,12 +13,12 @@ import (
 
 var (
 	foo   *grc20.AdminToken
-	admin std.Address = "g13f63ua8uhmuf9mgc0x8zfz04yrsaqh7j78vcgq" // TODO: helper to change admin
+	admin std.Address = "g13f63ua8uhmuf9mgc0x8zfz04yrsaqh7j78vcgq"
 )
 
 func init() {
 	foo = grc20.NewAdminToken("Foo", "FOO", 6)
-	foo.Mint(admin, 500_000_000_000_000)
+	foo.Mint(admin, 100_000_000_000_000)
 }
 
 // method proxies as public functions.
@@ -72,29 +72,6 @@ func TransferFrom(from, to pusers.AddressOrName, amount uint64) {
 	}
 }
 
-// faucet.
-
-func Faucet() {
-	// FIXME: add limits?
-	// FIXME: add payment in gnot?
-	caller := std.PrevRealm().Addr()
-	err := foo.Mint(caller, 100*1_000_000) // 100M
-	if err != nil {
-		panic(err.Error())
-	}
-}
-
-// administration.
-
-func Mint(address pusers.AddressOrName, amount uint64) {
-	caller := std.PrevRealm().Addr()
-	assertIsAdmin(caller)
-	err := foo.Mint(users.Resolve(address), amount)
-	if err != nil {
-		panic(err.Error())
-	}
-}
-
 func Burn(address pusers.AddressOrName, amount uint64) {
 	caller := std.PrevRealm().Addr()
 	assertIsAdmin(caller)

__local/grc20_tokens/obl/obl.gno

@@ -13,12 +13,12 @@ import (
 
 var (
 	obl   *grc20.AdminToken
-	admin std.Address = "g13f63ua8uhmuf9mgc0x8zfz04yrsaqh7j78vcgq" // TODO: helper to change admin
+	admin std.Address = "g13f63ua8uhmuf9mgc0x8zfz04yrsaqh7j78vcgq"
 )
 
 func init() {
-	obl = grc20.NewAdminToken("Obl", "OBL", 4)
-	obl.Mint(admin, 500_000_000_000_000)
+	obl = grc20.NewAdminToken("Obl", "OBL", 6)
+	obl.Mint(admin, 100_000_000_000_000)
 }
 
 // method proxies as public functions.
@@ -72,29 +72,6 @@ func TransferFrom(from, to pusers.AddressOrName, amount uint64) {
 	}
 }
 
-// faucet.
-
-func Faucet() {
-	// FIXME: add limits?
-	// FIXME: add payment in gnot?
-	caller := std.PrevRealm().Addr()
-	err := obl.Mint(caller, 100*1_000_000) // 100M
-	if err != nil {
-		panic(err.Error())
-	}
-}
-
-// administration.
-
-func Mint(address pusers.AddressOrName, amount uint64) {
-	caller := std.PrevRealm().Addr()
-	assertIsAdmin(caller)
-	err := obl.Mint(users.Resolve(address), amount)
-	if err != nil {
-		panic(err.Error())
-	}
-}
-
 func Burn(address pusers.AddressOrName, amount uint64) {
 	caller := std.PrevRealm().Addr()
 	assertIsAdmin(caller)

__local/grc20_tokens/qux/qux.gno

@@ -13,12 +13,12 @@ import (
 
 var (
 	qux   *grc20.AdminToken
-	admin std.Address = "g13f63ua8uhmuf9mgc0x8zfz04yrsaqh7j78vcgq" // TODO: helper to change admin
+	admin std.Address = "g13f63ua8uhmuf9mgc0x8zfz04yrsaqh7j78vcgq"
 )
 
 func init() {
-	qux = grc20.NewAdminToken("Qux", "QUX", 4)
-	qux.Mint(admin, 500_000_000_000_000)
+	qux = grc20.NewAdminToken("Qux", "QUX", 6)
+	qux.Mint(admin, 100_000_000_000_000)
 }
 
 // method proxies as public functions.

__local/grc20_tokens/register_gnodev/gno.mod

@@ -10,5 +10,6 @@ require (
 	gno.land/r/demo/obl v0.0.0-latest
 	gno.land/r/demo/pool v0.0.0-latest
 	gno.land/r/demo/qux v0.0.0-latest
+	gno.land/r/demo/usdc v0.0.0-latest
 	gno.land/r/demo/wugnot v0.0.0-latest
 )

__local/grc20_tokens/register_gnodev/register_gnodev.gno

@@ -10,6 +10,7 @@ import (
 	"gno.land/r/demo/gns"
 	"gno.land/r/demo/obl"
 	"gno.land/r/demo/qux"
+	"gno.land/r/demo/usdc"
 	"gno.land/r/demo/wugnot"
 
 	pl "gno.land/r/demo/pool"
@@ -137,6 +138,21 @@ func (WugnotToken) Approve() func(spender pusers.AddressOrName, amount uint64) {
 	return wugnot.Approve
 }
 
+type UsdcToken struct{}
+
+func (UsdcToken) Transfer() func(to pusers.AddressOrName, amount uint64) {
+	return usdc.Transfer
+}
+func (UsdcToken) TransferFrom() func(from, to pusers.AddressOrName, amount uint64) {
+	return usdc.TransferFrom
+}
+func (UsdcToken) BalanceOf() func(owner pusers.AddressOrName) uint64 {
+	return usdc.BalanceOf
+}
+func (UsdcToken) Approve() func(spender pusers.AddressOrName, amount uint64) {
+	return usdc.Approve
+}
+
 func init() {
 	pl.RegisterGRC20Interface("gno.land/r/demo/foo", FooToken{})
 	pl.RegisterGRC20Interface("gno.land/r/demo/bar", BarToken{})
@@ -146,6 +162,7 @@ func init() {
 	pl.RegisterGRC20Interface("gno.land/r/demo/obl", OblToken{})
 	pl.RegisterGRC20Interface("gno.land/r/demo/foo20", Foo20Token{})
 	pl.RegisterGRC20Interface("gno.land/r/demo/wugnot", WugnotToken{})
+	pl.RegisterGRC20Interface("gno.land/r/demo/usdc", UsdcToken{})
 
 	sr.RegisterGRC20Interface("gno.land/r/demo/foo", FooToken{})
 	sr.RegisterGRC20Interface("gno.land/r/demo/bar", BarToken{})
@@ -155,6 +172,7 @@ func init() {
 	sr.RegisterGRC20Interface("gno.land/r/demo/obl", OblToken{})
 	sr.RegisterGRC20Interface("gno.land/r/demo/foo20", Foo20Token{})
 	sr.RegisterGRC20Interface("gno.land/r/demo/wugnot", WugnotToken{})
+	sr.RegisterGRC20Interface("gno.land/r/demo/usdc", UsdcToken{})
 
 	rr.RegisterGRC20Interface("gno.land/r/demo/foo", FooToken{})
 	rr.RegisterGRC20Interface("gno.land/r/demo/bar", BarToken{})
@@ -164,4 +182,5 @@ func init() {
 	rr.RegisterGRC20Interface("gno.land/r/demo/obl", OblToken{})
 	rr.RegisterGRC20Interface("gno.land/r/demo/foo20", Foo20Token{})
 	rr.RegisterGRC20Interface("gno.land/r/demo/wugnot", WugnotToken{})
+	rr.RegisterGRC20Interface("gno.land/r/demo/usdc", UsdcToken{})
 }

__local/grc20_tokens/usdc/gno.mod

@@ -0,0 +1,8 @@
+module gno.land/r/demo/usdc
+
+require (
+	gno.land/p/demo/grc/grc20 v0.0.0-latest
+	gno.land/p/demo/ufmt v0.0.0-latest
+	gno.land/p/demo/users v0.0.0-latest
+	gno.land/r/demo/users v0.0.0-latest
+)

__local/grc20_tokens/usdc/usdc.gno

@@ -0,0 +1,130 @@
+package usdc
+
+import (
+	"std"
+	"strings"
+
+	"gno.land/p/demo/grc/grc20"
+	"gno.land/p/demo/ufmt"
+	"gno.land/r/demo/users"
+
+	pusers "gno.land/p/demo/users"
+)
+
+var (
+	usdc  *grc20.AdminToken
+	admin std.Address = "g13f63ua8uhmuf9mgc0x8zfz04yrsaqh7j78vcgq"
+)
+
+func init() {
+	usdc = grc20.NewAdminToken("Usd Coin", "USC", 6)
+	usdc.Mint(admin, 100_000_000_000_000)
+}
+
+// method proxies as public functions.
+//
+
+// getters.
+
+func TotalSupply() uint64 {
+	return usdc.TotalSupply()
+}
+
+func BalanceOf(owner pusers.AddressOrName) uint64 {
+	balance, err := usdc.BalanceOf(users.Resolve(owner))
+	if err != nil {
+		panic(err.Error())
+	}
+	return balance
+}
+
+func Allowance(owner, spender pusers.AddressOrName) uint64 {
+	allowance, err := usdc.Allowance(users.Resolve(owner), users.Resolve(spender))
+	if err != nil {
+		panic(err.Error())
+	}
+	return allowance
+}
+
+// setters.
+
+func Transfer(to pusers.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	err := usdc.Transfer(caller, users.Resolve(to), amount)
+	if err != nil {
+		panic(err.Error())
+	}
+}
+
+func Approve(spender pusers.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	err := usdc.Approve(caller, users.Resolve(spender), amount)
+	if err != nil {
+		panic(err.Error())
+	}
+}
+
+func TransferFrom(from, to pusers.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	err := usdc.TransferFrom(caller, users.Resolve(from), users.Resolve(to), amount)
+	if err != nil {
+		panic(err.Error())
+	}
+}
+
+// faucet.
+
+func Faucet() {
+	// FIXME: add limits?
+	// FIXME: add payment in gnot?
+	caller := std.PrevRealm().Addr()
+	err := usdc.Mint(caller, 100*1_000_000) // 100M
+	if err != nil {
+		panic(err.Error())
+	}
+}
+
+// administration.
+
+func Mint(address pusers.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	assertIsAdmin(caller)
+	err := usdc.Mint(users.Resolve(address), amount)
+	if err != nil {
+		panic(err.Error())
+	}
+}
+
+func Burn(address pusers.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	assertIsAdmin(caller)
+	err := usdc.Burn(users.Resolve(address), amount)
+	if err != nil {
+		panic(err.Error())
+	}
+}
+
+// render.
+//
+
+func Render(path string) string {
+	parts := strings.Split(path, "/")
+	c := len(parts)
+
+	switch {
+	case path == "":
+		return usdc.RenderHome()
+	case c == 2 && parts[0] == "balance":
+		owner := pusers.AddressOrName(parts[1])
+		balance, _ := usdc.BalanceOf(users.Resolve(owner))
+		return ufmt.Sprintf("%d\n", balance)
+	default:
+		return "404\n"
+	}
+}
+
+func assertIsAdmin(address std.Address) {
+	if address != admin {
+		panic("restricted access")
+	}
+}