| 1 | package gnft |
| 2 | |
| 3 | import ( |
| 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. |
| 11 | func 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. |
| 19 | func assertIsNonEmptyTokenURI(tURI string) { |
| 20 | if tURI == "" { |
| 21 | panic(makeErrorWithDetails(errCannotSetURI, "empty token URI")) |
| 22 | } |
| 23 | } |
| 24 | |
| 25 | // assertIsValidAddress panics if the address is invalid. |
| 26 | func 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. |
| 33 | func 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. |
| 40 | func 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. |
| 49 | func 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 | } |
