> For the complete documentation index, see [llms.txt](https://docs.kyte.sh/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.kyte.sh/protocol/contracts/option-nft.md).

# Option NFT metadata

How each Option NFT draws its own artwork on-chain.

`OptionNFT.tokenURI(id)` returns a `data:application/json;base64,…` document built entirely on-chain from the position:

| Field         | Value                                                                                                                                                       |
| ------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `name`        | `<SYMBOL> CALL #<localId>` or `<SYMBOL> PUT #<localId>`                                                                                                     |
| `description` | "Physically settled option. Exercise before expiry."                                                                                                        |
| `attributes`  | `Type` (CALL/PUT), `Underlying` (token address), `Amount` (raw units), `Strike` (wei WETH), `Expiry` (unix, date display)                                   |
| `image`       | Base64 SVG, 400 × 400, dark background; title in mint (`#7cf2c9`) for calls or coral (`#ff9a7a`) for puts; lines for underlying, strike, premium and expiry |

Amounts in the metadata are raw on-chain units (token base units, wei). The symbol is embedded only if it is 1–16 plain alphanumeric characters; otherwise it shows `TOKEN`, so a token's `symbol()` can never inject JSON or SVG. `tokenURI` reverts for ids that don't exist (burned on exercise or expiry).


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