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Token-2022 has no icon or description fields; both are served from the off-chain JSON document that its `uri` field points at. That field was initialized to an empty string, so wrapped tokens could never carry either. Adds `uri` to `PartialTokenMetadata` and passes it through to the metadata initialize CPI. It is deliberately excluded from the mint's PDA hash: that hash is recomputed from onchain metadata to authenticate a mint as a wrapped token, so extending the preimage would move every already-deployed mint to an address the program no longer derives. `wrap_token` keeps its exact wire format, taking a `PartialTokenMetadataV1` argument whose layout is byte-identical to the previous type, and delegates with an empty uri. `wrap_token_v2` accepts the uri. Both derive the same mint. Also fixes `create_mock_wrapped_mint`, which left `update_authority` and `mint` at their defaults rather than mirroring a real wrapped mint. Co-authored-by: Cursor <cursoragent@cursor.com>
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jackchuma
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September 22, 2026 11:50
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What changed? Why?
Adds an optional metadata URI when creating Solana wrapped tokens so wallets and indexers can retrieve an icon and description from the URI's offchain JSON metadata.
wrap_token_v2, which accepts the URI and stores it in the Token-2022 metadata extension.wrap_tokeninstruction and its wire format unchanged; it delegates to the shared handler with an empty URI so existing clients remain compatible.PartialTokenMetadataV1with the existing layout and discriminator, exportsMAX_URI_LEN(200) through the Anchor IDL, and regenerates both checked-in IDL artifacts.The wrapped-mint PDA derivation intentionally continues to exclude the URI. This preserves derivation of deployed wrapped mints and prevents a URI-only change from disrupting bridging or supply accounting.
Notes to reviewers
UriTooLong, 12706) are added without changing existing instruction discriminators or error codes.How has it been tested?
111tests pass and Clippy is clean.test_wrap_token_legacy_wire_format_is_unchangedhand-encodes the legacy instruction to verify its discriminator and argument ordering remain compatible.test_wrap_token_v2_stores_uri_on_mintverifies URI persistence and the additional mint funding required for Token-2022 metadata allocation.deployed_mint_still_derivesverifies a deployed mainnet wrapped mint still derives after the change, andv1_hashes_identically_and_converts_to_an_empty_uriverifies the legacy metadata conversion and hash invariants.