DDF-K Onchain Art

DDF-K Onchain Art

I created a limited series of art on the Kusama network blockchain featuring 100% on-chain art media! Allow me to present a member of my long line of Dope Dead Frogs (DDF), except this one hits different.

This is DDF-K and it is the first of my long line of cyber frog+skull emoji based art to ever appear in completely on-chain state. What does this mean? It means that unlike most art that is created as non-fungible tokens (NFTs) and have a token pointing to an art media file elsewhere like IPFS, the art media for DDF-K is written to the actual Kusama blockchain, where it will live on in infamy!

Stick around and I will show you how the data is contained in a Kusama block, and also how to extract and validate the image data.

Here is the physical appearance of DDF-K.

DDF-K is a dope dead frog artwork by obxium

There will only be 25 DDF-K offered at 1 KSM. Currently only numbers 3-18 are available for acquisition.

If you are interested in acquiring one, please use the contact form button below or DM @obxium on Twitter.

ACQUIRE DDF-K

The Nerdy Bits

Now for those who are curious & desire the full experience complete with nerd bits, here is the actual JSON data for DDFKSE3, the 3rd in the edition or serial 0000000000000003.

{
  "collection": "241B8516516F381A-DDFK",
  "name": "DDFKSE3",
  "transferable": 1,
  "sn": "0000000000000003",
  "metadata": {
    "external_url": "https://obxium.com",
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    "description": "Dope Dead Frog (DDF) Kusama Special Edition with on-chain SVG data. More information at https://obxium.com",
    "name": "DDFKSE3",
    "attributes": [
      {
        "compact-signature": "3255ee6a9a7f208d"
      }
    ],
    "background_color": "000000"
  }
}

Where the on-chain data tho?

All of the above JSON data is written in a system remark, following the RMRK specification as hex bytes, so that can be discovered in a block explorer like Polkascanner.

Here, let’s take a look again at DDFKSE3, the 3rd in the edition or serial 0000000000000003, which was minted in Kusama block 5393445. If you note the value of the _Remark field, it contains the entirety of the token data as URL escaped UTF-8 text.

rmrk::MINTNFT::%7B%22collection%22%3A%22241B8516516F381A-DDFK%22%2C%22name%22%3A%22DDFKSE3%22%2C%22transferable%22%3A1%2C%22sn%22%3A%220000000000000003%22%2C%22metadata%22%3A%7B%22external_url%22%3A%22https%3A//obxium.com%22%2C%22image_data%22%3A%22%3Csvg%20version%3D%271.1%27%20id%3D%27Layer_1%27%20xmlns%3D%27http%3A//www.w3.org/2000/svg%27%20xmlns%3Axlink%3D%27http%3A//www.w3.org/1999/xlink%27%20x%3D%270px%27%20y%3D%270px%27%20viewBox%3D%270%200%20512%20512%27%20style%3D%27enable-background%3Anew%200%200%20512%20512%3B%27%20xml%3Aspace%3D%27preserve%27%3E%3Cstyle%20type%3D%27text/css%27%3E.st0%7Bfill%3A%23E6007A%3B%7D.st1%7Bfill%3A%230B0B0B%3B%7D.st2%7Bfill%3A%23FFFFFF%3B%7D.st3%7Bfill%3A%2331383E%3B%7D.st4%7Bfill%3A%235FA8DC%3B%7D.st5%7Bfill%3A%23E0E7ED%3B%7D.st6%7Bfill%3A%23ED3276%3B%7D.st7%7Bfill%3A%23D3EDF6%3B%7D.st8%7Bfont-family%3A%27ComicSansMS-Bold%27%3B%7D.st9%7Bfont-size%3A2.4284px%3B%7D.st10%7Bfill%3Anone%3Bstroke%3A%23FFFFFF%3Bstroke-width%3A8%3B%7D%3C/style%3E%3Crect%20x%3D%27-22.55%27%20y%3D%27-18.05%27%20class%3D%27st0%27%20width%3D%27551.8%27%20height%3D%27551.8%27/%3E%3Cpath%20class%3D%27st1%27%20d%3D%27M447.6%2C135.45c1.05-7.57%2C0.77-15.97%2C0.77-25.15c0-36.82-41.59-97.5-81.52-97.5c-19.14%2C0-37.76%2C17.06-51.78%2C37.34c-20.31-4.23-41.73-6.34-63.76-6.34c-20.05%2C0-39.33%2C1.74-57.56%2C5.25c-12.48-20.93-29.78-38.91-49.67-38.91c-39.92%2C0-81.34%2C63.35-81.34%2C100.16c0%2C9.32-1%2C17.84-0.67%2C25.5c-2.35%2C4.1-4.54%2C8.34-6.57%2C12.71c-2.4%2C6.61-5.04%2C13.02-7.69%2C19.54c-0.33%2C1.01-0.65%2C2.03-0.97%2C3.05c-0.2%2C1.04-0.36%2C2.1-0.75%2C3.01c-0.12%2C0.23-0.23%2C0.47-0.35%2C0.7c-1.75%2C6.12-3.24%2C12.46-4.44%2C19.02c-1.47%2C12.09-2.89%2C23.76-3.62%2C35.67c-0.06%2C2.36-0.1%2C4.75-0.1%2C7.15c0%2C1.43%2C0%2C2.86%2C0%2C4.29c0.03%2C70.5%2C1.65%2C131.09%2C81.9%2C159.74v56.58c0%2C21.5%2C18.33%2C38.93%2C40.95%2C38.93c22.62%2C0%2C40.95-17.43%2C40.95-38.93v-40.94c4.42%2C0.35%2C9%2C0.65%2C13.65%2C0.91v40.03c0%2C21.5%2C18.33%2C38.93%2C40.95%2C38.93c22.62%2C0%2C40.95-17.43%2C40.95-38.93v-40.03c4.67-0.27%2C9.23-0.56%2C13.65-0.91v40.94c0%2C21.5%2C18.35%2C38.93%2C40.95%2C38.93c18.01%2C0%2C33.3-11.05%2C38.79-26.41c0.33-0.93%2C0.63-1.87%2C0.89-2.83c0.55-3.25%2C0.97-6.47%2C1.28-9.69c0%2C0%2C0%2C0%2C0%2C0v-56.58h0c0.24-0.09%2C0.48-0.17%2C0.72-0.26c81.15-29.33%2C81.18-91.64%2C81.18-163.76C474.4%2C196.6%2C464.64%2C162.9%2C447.6%2C135.45z%20M155.29%2C254.28c-31.64%2C0-57.09-15.02-57.09-47.36c0-32.34%2C25.45-67.55%2C57.09-67.55c31.64%2C0%2C57.49%2C35.21%2C57.49%2C67.55C212.78%2C249.29%2C186.93%2C254.28%2C155.29%2C254.28z%20M275.26%2C353.05c-9.49%2C0-17.48-6.12-20.46-14.61c-0.44%2C0.01-0.86%2C0.1-1.31%2C0.1s-0.87-0.09-1.31-0.1c-2.96%2C8.49-10.95%2C14.61-20.46%2C14.61c-12.03%2C0-21.76-9.75-21.76-21.76c0-9.98%2C6.75-18.31%2C15.92-20.86c3.64-8.89%2C14.55-15.41%2C27.61-15.41s23.95%2C6.51%2C27.61%2C15.41c9.15%2C2.57%2C15.92%2C10.88%2C15.92%2C20.86C297.02%2C343.3%2C287.27%2C353.05%2C275.26%2C353.05z%20M389.92%2C470.36c-0.49%2C0.64-1.08%2C1.28-1.61%2C1.82C388.84%2C471.64%2C389.43%2C471%2C389.92%2C470.36c0.07-0.09%2C0.14-0.18%2C0.2-0.28C390.06%2C470.18%2C389.99%2C470.27%2C389.92%2C470.36z%20M350.46%2C250.28c-30.66%2C0-55.33-14.56-55.33-45.89s24.66-65.46%2C55.33-65.46c30.66%2C0%2C55.71%2C34.12%2C55.71%2C65.46C406.17%2C245.44%2C381.12%2C250.28%2C350.46%2C250.28z%27/%3E%3Cg%3E%3Cg%3E%3Cg%3E%3Cpath%20class%3D%27st1%27%20d%3D%27M47.22%2C170.2c-0.38%2C1.23-0.74%2C2.46-1.1%2C3.71c0.11-0.23%2C0.23-0.47%2C0.35-0.7C46.85%2C172.3%2C47.02%2C171.24%2C47.22%2C170.2z%27/%3E%3C/g%3E%3C/g%3E%3C/g%3E%3Cpath%20class%3D%27st2%27%20d%3D%27M350.64%2C126.76c-37.49%2C0-67.65%2C41.72-67.65%2C80.03c0%2C38.32%2C30.16%2C56.11%2C67.65%2C56.11s68.12-5.92%2C68.12-56.11C418.76%2C168.48%2C388.13%2C126.76%2C350.64%2C126.76z%20M350.46%2C250.28c-30.66%2C0-55.33-14.56-55.33-45.89s24.66-65.46%2C55.33-65.46c30.66%2C0%2C55.71%2C34.12%2C55.71%2C65.46C406.17%2C245.44%2C381.12%2C250.28%2C350.46%2C250.28z%27/%3E%3Cpath%20class%3D%27st2%27%20d%3D%27M155.25%2C126.76c-37.49%2C0-67.65%2C41.72-67.65%2C80.03c0%2C38.32%2C30.16%2C56.11%2C67.65%2C56.11s68.12-5.92%2C68.12-56.11C223.37%2C168.48%2C192.74%2C126.76%2C155.25%2C126.76z%20M155.29%2C254.28c-31.64%2C0-57.09-15.02-57.09-47.36c0-32.34%2C25.45-67.55%2C57.09-67.55c31.64%2C0%2C57.49%2C35.21%2C57.49%2C67.55C212.78%2C249.29%2C186.93%2C254.28%2C155.29%2C254.28z%27/%3E%3Cg%3E%3Cpath%20class%3D%27st3%27%20d%3D%27M452.69%2C468.86c0%2C0-3%2C0-3-3v-20.98c0%2C0%2C0-3%2C3-3h19.48c0.75%2C0%2C1.5%2C0.75%2C1.5%2C0.75l2.25%2C2.25c0%2C0%2C0.75%2C0.75%2C0.75%2C1.5v19.48c0%2C0%2C0%2C3-3%2C3H452.69z%27/%3E%3Cpath%20class%3D%27st4%27%20d%3D%27M453.44%2C456.13v-0.75c0%2C0%2C0-1.5%2C1.5-1.5h15.73c1.5%2C0%2C1.5%2C1.5%2C1.5%2C1.5v0.75H453.44z%27/%3E%3Cpath%20class%3D%27st5%27%20d%3D%27M453.44%2C465.88v-9.76h18.73v9.74c0%2C0%2C0%2C1.5-1.5%2C1.5h-15.73C453.44%2C467.36%2C453.44%2C465.88%2C453.44%2C465.88zM457.19%2C444.14c0%2C0%2C0-0.75%2C0.75-0.75h13.49c0.79%2C0%2C0.75%2C0.75%2C0.75%2C0.75v7.49c0%2C0%2C0%2C0.75-0.75%2C0.75h-13.49c0%2C0-0.75%2C0-0.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If you pass this through a URL escaped string decoder, you will get back the original JSON shown at the beginning of the article.

In the original JSON is metadata.image_data, which contains the actual SVG code for the image!

So, if you save the contents of the image_data field as a file named something like DDF-K.svg, you can both view the contents with your own human eyeballs, and also invoke UNIX beard spells like file and shasum to even further validate the media file compact signature.

Validation Spells

Get media file magic.

file DDF-K.svg
DDF-K.svg: SVG Scalable Vector Graphics image

Get compact signature from SHA 256 hash of media file.

echo $(shasum -a 256 DDF-K.svg | awk '{print $1}') | \
    awk '{print substr($0, 1, 8) substr($0,length($0)-7, 8)}'
3255ee6a9a7f208d

The result, 3255ee6a9a7f208d matches the value in the compact-signature field. 🎉

obxium