docs: sync Grid Visualizer and Kotlin sample with Plasma/USDT schema changes

[claude]

Summary

• Add PLASMA_WALLET account type to Grid Visualizer data
• Add ETHEREUM_WALLET and PLASMA_WALLET networks for USDT in Grid Visualizer
• Add PLASMA_WALLET handler to Kotlin sample external account creation

Context

Recent OpenAPI schema changes added PLASMA_WALLET support and USDT on Ethereum. This PR syncs the documentation artifacts (Grid Visualizer, Kotlin sample) with these changes.

Related commits:

• 927ce42 Add Plasma (PLASMA_WALLET) to Grid public API schema (Add Plasma (PLASMA_WALLET) to Grid public API schema #724)
• 63b759d feat(payment-instructions): allow USDT as an Ethereum wallet assetType (feat(payment-instructions): allow USDT as an Ethereum wallet assetType #767)

Other schema changes reviewed (no doc updates needed)

The following recent schema changes were reviewed and require no documentation updates:

• SCA_SESSION_REQUIRED (409) and ACCOUNT_LOCKED (423) on quote authorize - already documented in OpenAPI spec
• SCA_NOT_COMPLETED outgoing transaction failure reason - already documented in OpenAPI spec
• Error400.details.errors[] array for field validation - already documented in OpenAPI spec

Mintlify docs already include PLASMA_WALLET in snippets/internal-accounts.mdx.

Test plan

• Grid Visualizer TypeScript compiles without errors
• Kotlin sample compiles without errors
• Verify PLASMA_WALLET appears in Grid Visualizer crypto selection for USDT

🤖 Generated with Claude Code

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
grid-flow-builder	Ready	Preview	Jul 30, 2026 9:01am

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
grid-wallet-demo	Ignored		Jul 30, 2026 9:01am

[greptile-apps]

Network options use missing icons

When the USDT network selector renders the new Ethereum and Plasma options, the dropdown derives /networks/ethereum.svg and /networks/plasma.svg, but those assets are absent, causing both options to display broken images.

Knowledge Base Used: Demo Apps and Samples

Prompt To Fix With AI

This is a comment left during a code review.
Path: components/grid-visualizer/src/data/crypto.ts
Line: 44-45

Comment:
**Network options use missing icons**

When the USDT network selector renders the new Ethereum and Plasma options, the dropdown derives `/networks/ethereum.svg` and `/networks/plasma.svg`, but those assets are absent, causing both options to display broken images.

**Knowledge Base Used:** [Demo Apps and Samples](https://app.greptile.com/lightspark/-/custom-context/knowledge-base/lightsparkdev/grid-api/-/docs/demo-apps-and-samples.md)

---

For each issue above, determine whether it is valid and should be fixed. If so, fix it directly.

[greptile-apps]

Greptile Summary

Synchronizes Plasma and expanded USDT support across the Grid Visualizer and Kotlin sample.

• Adds Plasma wallet field metadata to the visualizer.
• Adds Ethereum and Plasma network choices for USDT.
• Adds Plasma external-account construction to the Kotlin sample.

Confidence Score: 4/5

The missing Ethereum and Plasma network assets should be added before merging so the new USDT choices do not render broken images.

The new options are reachable through the existing network dropdown, which derives URLs for two SVG assets that are not present in the visualizer.

Files Needing Attention: components/grid-visualizer/src/data/crypto.ts and the corresponding public network assets

Important Files Changed

Filename	Overview
components/grid-visualizer/src/data/account-types.ts	Adds a Plasma wallet account specification with the expected address field and no beneficiary.
components/grid-visualizer/src/data/crypto.ts	Adds Ethereum and Plasma USDT choices, but both resolve to network icon assets that are absent.
samples/kotlin/src/main/kotlin/com/grid/sample/routes/ExternalAccounts.kt	Adds a Plasma wallet handler consistent with sibling wallet builders, although compatibility with the externally pinned SDK could not be independently established.

Prompt To Fix All With AI

### Issue 1
components/grid-visualizer/src/data/crypto.ts:44-45
**Network options use missing icons**

When the USDT network selector renders the new Ethereum and Plasma options, the dropdown derives `/networks/ethereum.svg` and `/networks/plasma.svg`, but those assets are absent, causing both options to display broken images.

---

For each issue above, determine whether it is valid and should be fixed. If so, fix it directly.

_{Reviews (1): Last reviewed commit: "docs: sync Grid Visualizer and Kotlin sa..." | Re-trigger Greptile}