gno.land/r/g1n4pl5uc4yt5r96m9w6fmdznx3x0jyg8l6arhmt/bazaar/stdnft⧉

1package stdnft23import (4	"chain"56	"gno.land/p/nt/grc721/enumerable/v0"7	"gno.land/p/nt/grc721/metadata/v0"8	"gno.land/p/nt/grc721/v0"9	"gno.land/p/nt/seqid/v0"10)1112// Adena probe: collection realm wrapping genesis GRC721 (string TokenID,13// metadata TokenURI, enumerable TokenOfOwnerByIndex). No List/Buy escrow.1415const (16	maxImageLen  = 20017	defaultImage = "https://bazaar-gno.vercel.app/gnomies.png"18)1920var (21	token    *grc721.Token22	ledger   *grc721.PrivateLedger23	metaView *metadata.Metadata24	metaLed  *metadata.Ledger25	enumView *enumerable.Enumerable26	tokenSeq seqid.ID27	inited   bool28	creator  address29)3031func Init(cur realm, name, symbol string) {32	if !cur.IsCurrent() {33		panic("stdnft: spoofed realm")34	}35	if !cur.Previous().IsUserCall() {36		panic("stdnft: EOA only")37	}38	if inited {39		panic("stdnft: already initialized")40	}41	tok, led := grc721.NewToken(name, symbol, tokenSeq.Next(), cur)42	token = tok43	ledger = led44	metaView, metaLed = metadata.NewMetadata(led)45	enumView, _ = enumerable.NewEnumerable(led)46	creator = cur.Previous().Address()47	inited = true48	chain.Emit("Init", "creator", creator.String(), "name", name, "symbol", symbol)49}5051func Mint(cur realm, tid, name, image string) {52	caller := requireUser(cur)53	if caller != creator {54		panic("stdnft: not creator")55	}56	if tid == "" {57		panic("stdnft: tid")58	}59	if name == "" || len(name) > grc721.MaxNameLen {60		panic("stdnft: name")61	}62	if image == "" {63		image = defaultImage64	}65	if len(image) > maxImageLen {66		panic("stdnft: image")67	}68	id := grc721.TokenID(tid)69	if err := ledger.Mint(caller, id); err != nil {70		panic("stdnft: mint")71	}72	if err := metaLed.SetTokenURI(id, tokenJSON(name, image)); err != nil {73		panic("stdnft: tokenURI")74	}75	if err := metaLed.SetTokenMetadata(id, metadata.Data{76		Name:        name,77		Description: name,78		Image:       image,79		Attributes:  []metadata.Trait{{TraitType: "Kind", Value: "stdnft"}},80	}); err != nil {81		panic("stdnft: metadata")82	}83	chain.Emit("Mint", "id", tid, "owner", caller.String())84}8586func Name() string {87	requireInit()88	return token.GetName()89}9091func Symbol() string {92	requireInit()93	return token.GetSymbol()94}9596func TotalSupply() int64 {97	requireInit()98	return token.TotalSupply()99}100101func BalanceOf(owner string) int64 {102	requireInit()103	who := address(owner)104	if !who.IsValid() {105		return 0106	}107	n, err := token.BalanceOf(who)108	if err != nil {109		return 0110	}111	return n112}113114func OwnerOf(tid string) string {115	requireInit()116	owner, err := token.OwnerOf(grc721.TokenID(tid))117	if err != nil {118		panic("stdnft: owner")119	}120	return owner.String()121}122123func TokenURI(tid string) string {124	requireInit()125	u, err := metaView.TokenURI(grc721.TokenID(tid))126	if err != nil {127		panic("stdnft: uri")128	}129	return u130}131132func TokenOfOwnerByIndex(owner string, index int64) string {133	requireInit()134	who := address(owner)135	if !who.IsValid() {136		panic("stdnft: addr")137	}138	id, err := enumView.TokenOfOwnerByIndex(who, index)139	if err != nil {140		panic("stdnft: index")141	}142	return id.String()143}144145func TokenByIndex(index int64) string {146	requireInit()147	id, err := enumView.TokenByIndex(index)148	if err != nil {149		panic("stdnft: index")150	}151	return id.String()152}153154func TokensOf(owner string) string {155	requireInit()156	who := address(owner)157	if !who.IsValid() {158		return ""159	}160	n, err := token.BalanceOf(who)161	if err != nil || n == 0 {162		return ""163	}164	out := ""165	var i int64166	for i = 0; i < n; i++ {167		id, err := enumView.TokenOfOwnerByIndex(who, i)168		if err != nil {169			panic("stdnft: tokens")170		}171		if out != "" {172			out += ","173		}174		out += id.String()175	}176	return out177}178179func Approve(cur realm, to, tid string) {180	caller := requireUser(cur)181	who := address(to)182	if to != "" && !who.IsValid() {183		panic("stdnft: addr")184	}185	if err := ledger.Approve(caller, who, grc721.TokenID(tid)); err != nil {186		panic("stdnft: approve")187	}188}189190func TransferFrom(cur realm, from, to, tid string) {191	caller := requireUser(cur)192	src := address(from)193	dst := address(to)194	if !src.IsValid() || !dst.IsValid() {195		panic("stdnft: addr")196	}197	if err := ledger.TransferFrom(caller, src, dst, grc721.TokenID(tid)); err != nil {198		panic("stdnft: transfer")199	}200}201202func Creator() string {203	requireInit()204	return creator.String()205}206207func Render(_ string) string {208	if !inited {209		return "# StdNFT\n\ncall Init first\n"210	}211	return token.RenderHome() + "\ncreator: " + creator.String() + "\n"212}213214func requireInit() {215	if !inited {216		panic("stdnft: call Init first")217	}218}219220func requireUser(cur realm) address {221	requireInit()222	if !cur.IsCurrent() {223		panic("stdnft: spoofed realm")224	}225	if !cur.Previous().IsUserCall() {226		panic("stdnft: EOA only")227	}228	return cur.Previous().Address()229}230231func tokenJSON(name, image string) string {232	body := `{"name":` + jsonStr(name) + `,"description":` + jsonStr(name) + `,"image":` + jsonStr(image) + `,"attributes":[{"trait_type":"Kind","value":"stdnft"}]}`233	return "data:application/json;charset=utf-8," + pctURI(body)234}235236func jsonStr(s string) string {237	out := `"`238	for _, r := range s {239		switch r {240		case '"':241			out += `\"`242		case '\\':243			out += `\\`244		case '\n':245			out += `\n`246		default:247			out += string(r)248		}249	}250	return out + `"`251}252253func pctURI(s string) string {254	out := ""255	for i := 0; i < len(s); i++ {256		c := s[i]257		if (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || c == '-' || c == '_' || c == '.' || c == '~' {258			out += string(c)259			continue260		}261		hex := "0123456789ABCDEF"262		out += "%"263		out += string([]byte{hex[c>>4], hex[c&15]})264	}265	return out266}267