metadata.gno

 1package nft
 2
 3import (
 4	"chain/runtime"
 5
 6	"gno.land/p/g17khqpukees4237dtn3astzapmp462vjhsz6st4/settlers/nft/v0"
 7	"gno.land/p/nt/grc721/v0"
 8)
 9
10// TokenURI returns the Settler image as an SVG data URI.
11// Wallets such as Adena read TokenURI directly as the token image,
12// so this must be the image itself. The metadata lives in TokenMetadata.
13func TokenURI(tid grc721.TokenID) (string, error) {
14	traits, err := TraitsOf(tid)
15	if err != nil {
16		return "", err
17	}
18
19	return nft.RenderDataURI(traits, nft.Options{Size: nft.CanonicalSize}), nil
20}
21
22// TokenMetadata returns a JSON string with the metadata of a Settler
23// in the format the Adena wallet can understand.
24func TokenMetadata(tid grc721.TokenID) (string, error) {
25	traits, err := TraitsOf(tid)
26	if err != nil {
27		return "", err
28	}
29
30	var attrs string
31	for i, attr := range traits.Attributes() {
32		if i > 0 {
33			attrs += ","
34		}
35
36		attrs += `{"traitType":"` + attr.Type + `","value":"` + attr.Value + `"}`
37	}
38
39	return `{"name":"Settler #` + string(tid) + `",` +
40		`"description":"Soulbound gnome of the early settlers of Gno.land. ` + nft.Credits + `",` +
41		`"image":"` + nft.RenderDataURI(traits, nft.Options{Size: nft.CanonicalSize}) + `",` +
42		`"externalUrl":"` + ExternalURL(tid) + `",` +
43		`"attributes":[` + attrs + `]}`, nil
44}
45
46// ExternalURL returns the URL to a Settler profile page.
47func ExternalURL(tid grc721.TokenID) string {
48	return "https://" + runtime.ChainDomain() + RealmPath + ":token/" + string(tid)
49}