newtoken_event_filetest.gno

  1// PKGPATH: gno.land/r/demo/grc721dupsignal
  2
  3// This filetest is the reference for the detection rule the NewToken event
  4// enables. The realm below reuses seqid 0 twice, so both tokens end up with the
  5// same Token.ID() and their Transfer events are indistinguishable — the
  6// long-standing event-provenance ambiguity.
  7//
  8// What changes is that the ambiguity is now *announced*. Two NewToken events
  9// carry the same "token" value, which is a complete signal: NewToken is the only
 10// way a Token can exist (Token's fields are unexported), so an indexer watching
 11// this event sees every token that will ever emit. On the second duplicate
 12// announcement it should flag the realm and stop trusting its token events.
 13package grc721dupsignal
 14
 15import (
 16	"gno.land/p/nt/grc721/v0"
 17)
 18
 19func main(cur realm) {
 20	first, firstLedger := grc721.NewToken("Same", "DUP", 0, cur)
 21	second, secondLedger := grc721.NewToken("Same", "DUP", 0, cur)
 22
 23	println("same id:", first.ID() == second.ID())
 24
 25	// Two independent ledgers, one identifier: these Transfers cannot be
 26	// attributed to either object from the event stream alone.
 27	firstLedger.Mint(cur.Address(), "1")
 28	secondLedger.Mint(cur.Address(), "2")
 29}
 30
 31// Output:
 32// same id: true
 33
 34// Events:
 35// [
 36//   {
 37//     "type": "NewToken",
 38//     "attrs": [
 39//       {
 40//         "key": "token",
 41//         "value": "gno.land/r/demo/grc721dupsignal.DUP.0000000"
 42//       },
 43//       {
 44//         "key": "name",
 45//         "value": "Same"
 46//       },
 47//       {
 48//         "key": "symbol",
 49//         "value": "DUP"
 50//       }
 51//     ],
 52//     "pkg_path": "gno.land/p/nt/grc721/v0"
 53//   },
 54//   {
 55//     "type": "NewToken",
 56//     "attrs": [
 57//       {
 58//         "key": "token",
 59//         "value": "gno.land/r/demo/grc721dupsignal.DUP.0000000"
 60//       },
 61//       {
 62//         "key": "name",
 63//         "value": "Same"
 64//       },
 65//       {
 66//         "key": "symbol",
 67//         "value": "DUP"
 68//       }
 69//     ],
 70//     "pkg_path": "gno.land/p/nt/grc721/v0"
 71//   },
 72//   {
 73//     "type": "Transfer",
 74//     "attrs": [
 75//       {
 76//         "key": "token",
 77//         "value": "gno.land/r/demo/grc721dupsignal.DUP.0000000"
 78//       },
 79//       {
 80//         "key": "from",
 81//         "value": ""
 82//       },
 83//       {
 84//         "key": "to",
 85//         "value": "g1f2p7p8jhjmg6atgukt8kveqgsrrk3qqhe6vg9m"
 86//       },
 87//       {
 88//         "key": "tokenId",
 89//         "value": "1"
 90//       }
 91//     ],
 92//     "pkg_path": "gno.land/p/nt/grc721/v0"
 93//   },
 94//   {
 95//     "type": "Transfer",
 96//     "attrs": [
 97//       {
 98//         "key": "token",
 99//         "value": "gno.land/r/demo/grc721dupsignal.DUP.0000000"
100//       },
101//       {
102//         "key": "from",
103//         "value": ""
104//       },
105//       {
106//         "key": "to",
107//         "value": "g1f2p7p8jhjmg6atgukt8kveqgsrrk3qqhe6vg9m"
108//       },
109//       {
110//         "key": "tokenId",
111//         "value": "2"
112//       }
113//     ],
114//     "pkg_path": "gno.land/p/nt/grc721/v0"
115//   }
116// ]