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@john-walter-munene john-walter-munene commented Jan 11, 2026

This commit:

  • Adds a new article: "Using SigmaUSD on Cardano"
  • Includes image resources for the article.

Summary by CodeRabbit

  • Documentation
    • Added a comprehensive guide for purchasing and holding SigUSD and SigRSV, with step-by-step instructions for wallet setup, transferring assets across Cardano and Ergo via Rosen Bridge, converting rsADA to SigUSD/SigRSV, and reversing the process; includes illustrative images and notes on future simplifications.

✏️ Tip: You can customize this high-level summary in your review settings.

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coderabbitai bot commented Jan 11, 2026

📝 Walkthrough

Walkthrough

A new Markdown article is added to public/articles that explains step-by-step how to acquire and hold SigmaUSD and SigRSV on Cardano using cross-chain transfers via Rosen Bridge, including wallet setup, ADA<>Ergo transfers, token conversion via Spectrum/sigmausd.io, and returning stablecoins to Cardano.

Changes

Cohort / File(s) Summary
New Article
public/articles/buy-and-hodl-sigusd-rsv-on-cardano.md
Added a 139-line guide detailing installation of an Ergo wallet (Nautilus), transferring ADA to/from Ergo via Rosen Bridge, converting rsADA to SigUSD/SigRSV using Spectrum and optionally sigmausd.io, embedded images and links, and notes on future Djed Alliance integration.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Suggested reviewers

  • Zahnentferner

Poem

🐰 I hopped across chains, a tiny guide to write,
From Cardano’s hills to Ergo’s night,
SigUSD tucked in my cozy pouch,
SigRSV beside it, safe as couch,
Hodl and hop — a rabbit’s delight!

🚥 Pre-merge checks | ✅ 3
✅ Passed checks (3 passed)
Check name Status Explanation
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title accurately describes the main change: adding a new article about using SigmaUSD on Cardano, which aligns with the file addition and PR objectives.
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✏️ Tip: You can configure your own custom pre-merge checks in the settings.


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Actionable comments posted: 2

🤖 Fix all issues with AI agents
In @public/articles/buy-and-hodl-sigusd-rsv-on-cardano.md:
- Line 45: Replace the typo "Vsit" with "Visit" in the markdown text that reads
"Vsit [app.rosen.tech](https://app.rosen.tech/) and select Cardano as source and
Ergo as target blockchains." so the line becomes "Visit
[app.rosen.tech](https://app.rosen.tech/) and select Cardano as source and Ergo
as target blockchains."
- Line 28: The image tag '![](../images/Create-a-wallet-on-Nautilus.webp)' lacks
alt text; update this Markdown image to include a concise, descriptive alt
attribute (e.g., describe the scene/purpose such as "Nautilus wallet creation
screen showing seed phrase setup") by replacing the empty brackets with that
text so screen readers and search engines can interpret the image.
📜 Review details

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 77563de and 5fe183f.

📒 Files selected for processing (18)
  • public/articles/buy-and-hodl-sigusd-rsv-on-cardano.md
  • public/images/Create-a-wallet-on-Nautilus.webp
  • public/images/assets-view-on-ergo.webp
  • public/images/confirm-swap.webp
  • public/images/connect-cardano-wallet-to-bridge.webp
  • public/images/connect-nautilus-to-spectrum.webp
  • public/images/enter-address-of-wallet-on-rosen.webp
  • public/images/enter-desired-amount-of-assets-to-buy.webp
  • public/images/repeat-swap-for-any-other-asset.webp
  • public/images/review-transfer-requests-assets.webp
  • public/images/review-transfered-assets.webp
  • public/images/rosen-bridge.webp
  • public/images/select-asset-conversion-on-spectrum.webp
  • public/images/set-wallet-to-buy-assets-into.webp
  • public/images/successfull-transfer-to-ergo.webp
  • public/images/test-net-wallet.webp
  • public/images/transfer-assets-to-cardano.webp
  • public/images/using-sigmausd-on-cardano.webp
🧰 Additional context used
🪛 LanguageTool
public/articles/buy-and-hodl-sigusd-rsv-on-cardano.md

[grammar] ~45-~45: Ensure spelling is correct
Context: ...such as Eternl. - Vsit [app.rosen.tech](https://app.rosen.tech...

(QB_NEW_EN_ORTHOGRAPHY_ERROR_IDS_1)

🪛 markdownlint-cli2 (0.18.1)
public/articles/buy-and-hodl-sigusd-rsv-on-cardano.md

28-28: Images should have alternate text (alt text)

(MD045, no-alt-text)


51-51: Images should have alternate text (alt text)

(MD045, no-alt-text)


56-56: Images should have alternate text (alt text)

(MD045, no-alt-text)


60-60: Images should have alternate text (alt text)

(MD045, no-alt-text)


66-66: Images should have alternate text (alt text)

(MD045, no-alt-text)


77-77: Images should have alternate text (alt text)

(MD045, no-alt-text)


81-81: Images should have alternate text (alt text)

(MD045, no-alt-text)


86-86: Images should have alternate text (alt text)

(MD045, no-alt-text)


90-90: Images should have alternate text (alt text)

(MD045, no-alt-text)


94-94: Images should have alternate text (alt text)

(MD045, no-alt-text)


108-108: Images should have alternate text (alt text)

(MD045, no-alt-text)


113-113: Images should have alternate text (alt text)

(MD045, no-alt-text)


121-121: Images should have alternate text (alt text)

(MD045, no-alt-text)


125-125: Images should have alternate text (alt text)

(MD045, no-alt-text)


129-129: Images should have alternate text (alt text)

(MD045, no-alt-text)

🔇 Additional comments (1)
public/articles/buy-and-hodl-sigusd-rsv-on-cardano.md (1)

1-138: No action required. All 16 image files referenced in the markdown (Create-a-wallet-on-Nautilus.webp, rosen-bridge.webp, connect-cardano-wallet-to-bridge.webp, select-asset-conversion-on-spectrum.webp, confirm-swap.webp, assets-view-on-ergo.webp, repeat-swap-for-any-other-asset.webp, enter-address-of-wallet-on-rosen.webp, connect-nautilus-to-spectrum.webp, enter-desired-amount-of-assets-to-buy.webp, set-wallet-to-buy-assets-into.webp, successfull-transfer-to-ergo.webp, test-net-wallet.webp, transfer-assets-to-cardano.webp, review-transfer-requests-assets.webp, and review-transfered-assets.webp) exist and are correctly included in the repository.

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Actionable comments posted: 1

🤖 Fix all issues with AI agents
In @public/articles/buy-and-hodl-sigusd-rsv-on-cardano.md:
- Line 28: The article's 15 embedded images lack alt text, so add descriptive
alt attributes to each markdown image tag (e.g., the image referencing
Create-a-wallet-on-Nautilus.webp and the other images listed at lines 51, 56,
60, 66, 77, 81, 86, 90, 94, 108, 113, 121, 125, 129) by replacing "![](...)"
with "! [descriptive alt text](...)" using concise, contextual descriptions of
the image content (e.g., "Nautilus wallet creation screen", "Rosen Bridge
interface showing transfer steps", etc.) to satisfy accessibility and SEO
requirements.
📜 Review details

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 5fe183f and b02d008.

📒 Files selected for processing (1)
  • public/articles/buy-and-hodl-sigusd-rsv-on-cardano.md
🧰 Additional context used
🪛 markdownlint-cli2 (0.18.1)
public/articles/buy-and-hodl-sigusd-rsv-on-cardano.md

28-28: Images should have alternate text (alt text)

(MD045, no-alt-text)


51-51: Images should have alternate text (alt text)

(MD045, no-alt-text)


56-56: Images should have alternate text (alt text)

(MD045, no-alt-text)


60-60: Images should have alternate text (alt text)

(MD045, no-alt-text)


66-66: Images should have alternate text (alt text)

(MD045, no-alt-text)


77-77: Images should have alternate text (alt text)

(MD045, no-alt-text)


81-81: Images should have alternate text (alt text)

(MD045, no-alt-text)


86-86: Images should have alternate text (alt text)

(MD045, no-alt-text)


90-90: Images should have alternate text (alt text)

(MD045, no-alt-text)


94-94: Images should have alternate text (alt text)

(MD045, no-alt-text)


108-108: Images should have alternate text (alt text)

(MD045, no-alt-text)


113-113: Images should have alternate text (alt text)

(MD045, no-alt-text)


121-121: Images should have alternate text (alt text)

(MD045, no-alt-text)


125-125: Images should have alternate text (alt text)

(MD045, no-alt-text)


129-129: Images should have alternate text (alt text)

(MD045, no-alt-text)

🔇 Additional comments (2)
public/articles/buy-and-hodl-sigusd-rsv-on-cardano.md (2)

1-7: LGTM!

The YAML frontmatter is properly formatted with all required metadata fields.


9-135: Content is well-structured and technically sound.

The article provides clear step-by-step instructions for acquiring SigmaUSD/SigRSV on Cardano. The sections flow logically, learning objectives are met, and the procedural guidance is detailed and accurate. The tone is appropriate for users with no Ergo ecosystem familiarity.


Once the Nautilus wallet is installed, you can create a new wallet by opening the extension.

![](../images/Create-a-wallet-on-Nautilus.webp)
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⚠️ Potential issue | 🟠 Major

Add alt text to all 15 embedded images for accessibility and SEO.

All images in this article are missing alt text, which violates WCAG accessibility standards. Screen reader users cannot understand the visual content, and search engines cannot index the images properly.

♿ Add descriptive alt text to all images
-![](../images/Create-a-wallet-on-Nautilus.webp)
+![Nautilus wallet creation interface showing new wallet setup](../images/Create-a-wallet-on-Nautilus.webp)

-![Full History of Djed Alliance](../images/rosen-bridge.webp)
+![Rosen Bridge interface with Cardano selected as source blockchain and Ergo as target](../images/rosen-bridge.webp)

-![](../images/connect-cardano-wallet-to-bridge.webp)
+![Rosen Bridge wallet connection dialog for Cardano](../images/connect-cardano-wallet-to-bridge.webp)

-![](../images/test-net-wallet.webp)
+![Nautilus wallet receive tab showing Ergo address](../images/test-net-wallet.webp)

-![](../images/enter-address-of-wallet-on-rosen.webp)
+![Rosen Bridge address input field with Ergo wallet address](../images/enter-address-of-wallet-on-rosen.webp)

-![](../images/successfull-transfer-to-ergo.webp)
+![Nautilus wallet showing successfully received rsADA and ERG from Rosen Bridge](../images/successfull-transfer-to-ergo.webp)

-![](../images/connect-nautilus-to-spectrum.webp)
+![Spectrum DEX interface with Nautilus wallet connection option](../images/connect-nautilus-to-spectrum.webp)

-![](../images/select-asset-conversion-on-spectrum.webp)
+![Spectrum swap interface selecting rsADA and ERG as conversion assets](../images/select-asset-conversion-on-spectrum.webp)

-![](../images/confirm-swap.webp)
+![Spectrum swap confirmation dialog showing transaction details](../images/confirm-swap.webp)

-![](../images/assets-view-on-ergo.webp)
+![Nautilus wallet assets view displaying ERG balance after successful swap](../images/assets-view-on-ergo.webp)

-![](../images/repeat-swap-for-any-other-asset.webp)
+![Spectrum interface ready to perform second swap from ERG to SigUSD or SigRSV](../images/repeat-swap-for-any-other-asset.webp)

-![](../images/set-wallet-to-buy-assets-into.webp)
+![Sigmausd.io Set Wallet interface connecting Nautilus wallet](../images/set-wallet-to-buy-assets-into.webp)

-![](../images/enter-desired-amount-of-assets-to-buy.webp)
+![Sigmausd.io purchase interface showing StableCoin and ReserveCoin options with amount input](../images/enter-desired-amount-of-assets-to-buy.webp)

-![](../images/transfer-assets-to-cardano.webp)
+![Rosen Bridge configured for transferring SigUSD/SigRSV from Ergo to Cardano](../images/transfer-assets-to-cardano.webp)

-![](../images/review-transfer-requests-assets.webp)
+![Rosen Bridge EVENTS section showing pending transfer request status](../images/review-transfer-requests-assets.webp)

-![](../images/review-transfered-assets.webp)
+![Cardano wallet displaying received rsSigUSD and rsSigRSV tokens](../images/review-transfered-assets.webp)

Note: The alt text in line 47 reads "Full History of Djed Alliance" which appears inconsistent with the image context (Rosen Bridge interface). This has been corrected in the diff above.

Also applies to: 51-51, 56-56, 60-60, 66-66, 77-77, 81-81, 86-86, 90-90, 94-94, 108-108, 113-113, 121-121, 125-125, 129-129

🧰 Tools
🪛 markdownlint-cli2 (0.18.1)

28-28: Images should have alternate text (alt text)

(MD045, no-alt-text)

🤖 Prompt for AI Agents
In @public/articles/buy-and-hodl-sigusd-rsv-on-cardano.md at line 28, The
article's 15 embedded images lack alt text, so add descriptive alt attributes to
each markdown image tag (e.g., the image referencing
Create-a-wallet-on-Nautilus.webp and the other images listed at lines 51, 56,
60, 66, 77, 81, 86, 90, 94, 108, 113, 121, 125, 129) by replacing "![](...)"
with "! [descriptive alt text](...)" using concise, contextual descriptions of
the image content (e.g., "Nautilus wallet creation screen", "Rosen Bridge
interface showing transfer steps", etc.) to satisfy accessibility and SEO
requirements.

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