🛡️ Sentinel: [MEDIUM] Add timeouts to external fetch calls

[felirami]

User description

🚨 Severity: MEDIUM
💡 Vulnerability: The native fetch API lacks a default timeout, which can cause requests to hang indefinitely if the remote server becomes unresponsive.
🎯 Impact: Hanging requests can lead to server resource exhaustion, connection pool depletion, and potential Denial of Service (DoS).
🔧 Fix: Added signal: AbortSignal.timeout(...) to external fetch calls in src/lib/network.ts, src/lib/snap-market.ts, and scripts/sync-sources.mjs with appropriate timeout values.
✅ Verification: Successfully ran npm run lint, npm run typecheck, and npm run build to verify code correctness. All requests are properly enclosed in try/catch blocks to handle resulting TimeoutError exceptions.

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PR created automatically by Jules for task 14815752205669755317 started by @felirami

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Note

Low Risk
Small, defensive change with bounded timeouts; no auth or data-model changes, and errors are already handled in callers.

Overview
Adds AbortSignal.timeout to outbound fetch calls so hung upstream APIs cannot hold connections open indefinitely.

scripts/sync-sources.mjs defines GITHUB_API_TIMEOUT_MS (30s) and applies it to both fetchGithubJson and fetchGithubText, covering all GitHub sync traffic. src/lib/network.ts adds the same pattern to getNetworkStatus (10s via existing NODE_PROBE_TIMEOUT_MS). src/lib/snap-market.ts exports SNAP_MARKET_TIMEOUT_MS (10s) and uses it in getSnapMarketData for Dexscreener.

Failures surface through existing try/catch paths (including timeout-aware messaging in network.ts).

^{Reviewed by Cursor Bugbot for commit 98f3e68. Bugbot is set up for automated code reviews on this repo. Configure here.}

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CodeAnt-AI Description

Prevent external requests from hanging indefinitely

What Changed

• Network status checks now stop after a short timeout instead of waiting forever for an unresponsive service
• Snap market data requests now fail fast when Dexscreener does not respond in time
• GitHub sync requests now stop after 30 seconds, reducing the chance of stalled source updates

Impact

✅ Fewer stuck network checks
✅ Fewer stalled market data requests
✅ Shorter GitHub sync runs

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Note

Add 30s timeouts to GitHub API and market data fetch calls

• Adds AbortSignal.timeout() to fetchGithubJson and fetchGithubText in sync-sources.mjs with a 30s timeout via a new GITHUB_API_TIMEOUT_MS constant.
• Adds a timeout to getNetworkStatus in network.ts using the existing NODE_PROBE_TIMEOUT_MS constant, returning ok: false on abort.
• Adds a 10s timeout to getSnapMarketData in snap-market.ts via a new exported SNAP_MARKET_TIMEOUT_MS constant, returning ok: false on timeout.
• Behavioral Change: all three fetch sites now reject or return an error after their respective timeouts instead of hanging indefinitely.

^{Macroscope summarized 98f3e68.}

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Project	Deployment	Actions	Updated (UTC)
hypersnaporg	Ready	Preview, Comment	Jun 27, 2026 8:52pm

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