fix: normalize upstream error messages returned to clients

[kaladinlight]

Summary

• evm: viem errors currently pass their full formatted message through to the client, which includes request metadata, docs links and version strings. Only surface the short message and details so responses stay readable.
• cosmossdk: upstream request urls echoed in error responses now have provider path segments stripped, so clients get a consistent message regardless of which provider a coinstack is configured against.

No behavior change for successful requests or for axios and blockbook error paths.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Sensitive API key values are now automatically redacted from error responses.
  • Errors from the viem library are now consistently returned as internal server errors with clearer diagnostic messages.

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⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: dc868ea0-9319-4126-bbfa-118e837c693c

📥 Commits

Reviewing files that changed from the base of the PR and between 1543962 and 2c41cb3.

📒 Files selected for processing (1)

• go/shared/api/handlers.go

📝 Walkthrough

Walkthrough

The change updates error handling in Go and TypeScript. Go responses redact API key values. The TypeScript utility converts viem errors into 500 ApiError responses with combined error details.

Changes

Error handling

Layer / File(s)	Summary
Go API key redaction go/shared/api/handlers.go	HandleError detects API key values and replaces them with api=<redacted> before creating the response.
Viem error normalization node/coinstacks/common/api/src/utils.ts	handleError recognizes viem errors and returns a 500 ApiError using the short message and optional details.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Suggested reviewers: 0xapotheosis

Merge Risk: 🔵 Low · up to 15439

Error responses can lose unrelated URL context, and consumers of the common API package may fail to resolve its new viem import. Address these issues before publishing or consuming the package independently.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: normalizing upstream error messages returned to clients across the affected providers.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 2

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
In `@go/shared/api/handlers.go`:
- Line 13: Update apiKeyPattern used by HandleError so API-key matches stop at
query-parameter delimiters, including encoded “&” and other applicable URL
separators, preventing unrelated URL parameters from being redacted. Preserve
redaction of the API-key value itself.

In `@node/coinstacks/common/api/src/utils.ts`:
- Line 5: Declare viem as a runtime dependency of `@shapeshiftoss/common-api`,
since utils.ts imports and uses ViemError at runtime; add it to that package’s
dependencies without changing unrelated dependency declarations.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: 5193c60e-40ed-4d74-a1b9-f3e3d5d392e7

📥 Commits

Reviewing files that changed from the base of the PR and between 48829aa and 1543962.

📒 Files selected for processing (2)

• go/shared/api/handlers.go
• node/coinstacks/common/api/src/utils.ts

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