Multiple tokens payment (GRC20)

examples/gno.land/r/x/grc20_dynamic_call/bar/bar.gno

@@ -0,0 +1,130 @@
+package bar
+
+import (
+	"std"
+	"strings"
+
+	"gno.land/p/demo/grc/grc20"
+	"gno.land/p/demo/ufmt"
+	"gno.land/r/demo/users"
+)
+
+var (
+	bar   *grc20.AdminToken
+	admin std.Address = "g1us8428u2a5satrlxzagqqa5m6vmuze025anjlj" // TODO: helper to change admin
+)
+
+func init() {
+	bar = grc20.NewAdminToken("Bar", "BAR", 4)
+	bar.Mint(admin, 1000000*10000)                                    // @administrator (1M)
+	bar.Mint("g1u7y667z64x2h7vc6fmpcprgey4ck233jaww9zq", 10000*10000) // @manfred (10k)
+}
+
+// method proxies as public functions.
+//
+
+// getters.
+
+func TotalSupply() uint64 {
+	return bar.TotalSupply()
+}
+
+func BalanceOf(owner users.AddressOrName) uint64 {
+	balance, err := bar.BalanceOf(owner.Resolve())
+	if err != nil {
+		panic(err)
+	}
+	return balance
+}
+
+func Allowance(owner, spender users.AddressOrName) uint64 {
+	allowance, err := bar.Allowance(owner.Resolve(), spender.Resolve())
+	if err != nil {
+		panic(err)
+	}
+	return allowance
+}
+
+// setters.
+
+func Transfer(to users.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	err := bar.Transfer(caller, to.Resolve(), amount)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func Approve(spender users.AddressOrName, amount uint64) {
+	// caller := std.PrevRealm().Addr()
+	caller := std.GetOrigCaller()
+	err := bar.Approve(caller, spender.Resolve(), amount)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func TransferFrom(from, to users.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	err := bar.TransferFrom(caller, from.Resolve(), to.Resolve(), amount)
+	if err != nil {
+		panic(err)
+	}
+}
+
+// faucet.
+
+func Faucet() {
+	// FIXME: add limits?
+	// FIXME: add payment in gnot?
+	caller := std.PrevRealm().Addr()
+	err := bar.Mint(caller, 1000*10000) // 1k
+	if err != nil {
+		panic(err)
+	}
+}
+
+// administration.
+
+func Mint(address users.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	assertIsAdmin(caller)
+	err := bar.Mint(address.Resolve(), amount)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func Burn(address users.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	assertIsAdmin(caller)
+	err := bar.Burn(address.Resolve(), amount)
+	if err != nil {
+		panic(err)
+	}
+}
+
+// render.
+//
+
+func Render(path string) string {
+	parts := strings.Split(path, "/")
+	c := len(parts)
+
+	switch {
+	case path == "":
+		return bar.RenderHome()
+	case c == 2 && parts[0] == "balance":
+		owner := users.AddressOrName(parts[1])
+		balance, _ := bar.BalanceOf(owner.Resolve())
+		return ufmt.Sprintf("%d\n", balance)
+	default:
+		return "404\n"
+	}
+}
+
+func assertIsAdmin(address std.Address) {
+	if address != admin {
+		panic("restricted access")
+	}
+}

examples/gno.land/r/x/grc20_dynamic_call/bar/gno.mod

@@ -0,0 +1,7 @@
+module gno.land/r/x/grc20_dynamic_call/bar
+
+require (
+	gno.land/p/demo/grc/grc20 v0.0.0-latest
+	gno.land/p/demo/ufmt v0.0.0-latest
+	gno.land/r/demo/users v0.0.0-latest
+)

examples/gno.land/r/x/grc20_dynamic_call/baz/baz.gno

@@ -0,0 +1,130 @@
+package baz
+
+import (
+	"std"
+	"strings"
+
+	"gno.land/p/demo/grc/grc20"
+	"gno.land/p/demo/ufmt"
+	"gno.land/r/demo/users"
+)
+
+var (
+	baz   *grc20.AdminToken
+	admin std.Address = "g1us8428u2a5satrlxzagqqa5m6vmuze025anjlj" // TODO: helper to change admin
+)
+
+func init() {
+	baz = grc20.NewAdminToken("Baz", "BAZ", 4)
+	baz.Mint(admin, 1000000*10000)                                    // @administrator (1M)
+	baz.Mint("g1u7y667z64x2h7vc6fmpcprgey4ck233jaww9zq", 10000*10000) // @manfred (10k)
+}
+
+// method proxies as public functions.
+//
+
+// getters.
+
+func TotalSupply() uint64 {
+	return baz.TotalSupply()
+}
+
+func BalanceOf(owner users.AddressOrName) uint64 {
+	balance, err := baz.BalanceOf(owner.Resolve())
+	if err != nil {
+		panic(err)
+	}
+	return balance
+}
+
+func Allowance(owner, spender users.AddressOrName) uint64 {
+	allowance, err := baz.Allowance(owner.Resolve(), spender.Resolve())
+	if err != nil {
+		panic(err)
+	}
+	return allowance
+}
+
+// setters.
+
+func Transfer(to users.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	err := baz.Transfer(caller, to.Resolve(), amount)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func Approve(spender users.AddressOrName, amount uint64) {
+	// caller := std.PrevRealm().Addr()
+	caller := std.GetOrigCaller()
+	err := baz.Approve(caller, spender.Resolve(), amount)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func TransferFrom(from, to users.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	err := baz.TransferFrom(caller, from.Resolve(), to.Resolve(), amount)
+	if err != nil {
+		panic(err)
+	}
+}
+
+// faucet.
+
+func Faucet() {
+	// FIXME: add limits?
+	// FIXME: add payment in gnot?
+	caller := std.PrevRealm().Addr()
+	err := baz.Mint(caller, 1000*10000) // 1k
+	if err != nil {
+		panic(err)
+	}
+}
+
+// administration.
+
+func Mint(address users.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	assertIsAdmin(caller)
+	err := baz.Mint(address.Resolve(), amount)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func Burn(address users.AddressOrName, amount uint64) {
+	caller := std.PrevRealm().Addr()
+	assertIsAdmin(caller)
+	err := baz.Burn(address.Resolve(), amount)
+	if err != nil {
+		panic(err)
+	}
+}
+
+// render.
+//
+
+func Render(path string) string {
+	parts := strings.Split(path, "/")
+	c := len(parts)
+
+	switch {
+	case path == "":
+		return baz.RenderHome()
+	case c == 2 && parts[0] == "balance":
+		owner := users.AddressOrName(parts[1])
+		balance, _ := baz.BalanceOf(owner.Resolve())
+		return ufmt.Sprintf("%d\n", balance)
+	default:
+		return "404\n"
+	}
+}
+
+func assertIsAdmin(address std.Address) {
+	if address != admin {
+		panic("restricted access")
+	}
+}

examples/gno.land/r/x/grc20_dynamic_call/baz/gno.mod

@@ -0,0 +1,7 @@
+module gno.land/r/x/grc20_dynamic_call/baz
+
+require (
+	gno.land/p/demo/grc/grc20 v0.0.0-latest
+	gno.land/p/demo/ufmt v0.0.0-latest
+	gno.land/r/demo/users v0.0.0-latest
+)