assert.gno

 1package gnft
 2
 3import (
 4	prabc "gno.land/p/gnoswap/rbac/v1"
 5	"gno.land/p/nt/grc721/v0"
 6	"gno.land/p/nt/ufmt/v0"
 7	"gno.land/r/gnoswap/access/v1"
 8)
 9
10// assertIsValidTokenURI panics if the token already has a URI set.
11func assertIsValidTokenURI(tid grc721.TokenID) {
12	uri, _ := meta.TokenURI(tid)
13	if uri != "" {
14		panic(makeErrorWithDetails(errCannotSetURI, ufmt.Sprintf("token id (%s) has already set URI", string(tid))))
15	}
16}
17
18// assertIsNonEmptyTokenURI panics if the new URI is empty.
19func assertIsNonEmptyTokenURI(tURI string) {
20	if tURI == "" {
21		panic(makeErrorWithDetails(errCannotSetURI, "empty token URI"))
22	}
23}
24
25// assertIsValidAddress panics if the address is invalid.
26func assertIsValidAddress(addr address) {
27	if !addr.IsValid() {
28		panic(makeErrorWithDetails(errInvalidAddress, ufmt.Sprintf("address (%s)", addr.String())))
29	}
30}
31
32// assertFromIsValidAddress panics if the from address is invalid.
33func assertFromIsValidAddress(from address) {
34	if !from.IsValid() {
35		panic(makeErrorWithDetails(errInvalidAddress, ufmt.Sprintf("from address (%s)", from.String())))
36	}
37}
38
39// assertToIsValidAddress panics if the to address is invalid.
40func assertToIsValidAddress(to address) {
41	if !to.IsValid() {
42		panic(makeErrorWithDetails(errInvalidAddress, ufmt.Sprintf("to address (%s)", to.String())))
43	}
44}
45
46// assertIsAllowedTransfer enforces that NFTs held
47// by the staker (i.e. currently staked) can only be moved by the staker itself.
48// Other tokens fall through to the standard GRC721 owner/approval checks performed inside ledger.
49func assertIsAllowedTransfer(caller address, tid grc721.TokenID) {
50	owner, err := token.OwnerOf(tid)
51	if err != nil {
52		// Surface the same not-found error as the standard transfer path.
53		checkErr(err)
54	}
55
56	stakerAddr := access.MustGetAddress(prabc.ROLE_STAKER.String())
57	if owner != stakerAddr {
58		return
59	}
60
61	if caller != stakerAddr {
62		panic(makeErrorWithDetails(
63			errStakedTokenLocked,
64			ufmt.Sprintf("token (%s) is held by staker", string(tid)),
65		))
66	}
67}