Add structured logging to uploadBlob handler for error diagnosis

[Copilot]

Summary

Successfully added comprehensive logging to the uploadBlob handler to help identify the source of 4xx and 5xx errors.

Completed Tasks

• Add logging at handler entry with input details
• Add logging for repo parameter parsing and validation
• Add logging for shared repository access checks
• Add logging for account validation calls
• Add logging for OAuth permission checks
• Add logging before blob upload operation
• Add logging after blob upload succeeds
• Add logging for transaction operations (trackUntetheredBlob, verifyBlobAndMakePermanent)
• Add error logging in catch blocks with context
• Add logging at handler exit with response
• Apply consistent [uploadBlob] prefix to all log statements
• Code review completed and feedback addressed
• Security scan completed (no issues found)
• Run prettier formatting

Changes

• File: packages/sds/src/api/com/sds/repo/uploadBlob.ts
• Lines Added: ~105 lines of logging
• Business Logic Changed: None
• Pattern: Consistent [uploadBlob] prefix for all logs
• Error Handling: All catch blocks now include detailed error logging

Benefits

• Easy identification of error sources through step-by-step logging
• Consistent log format for filtering in log aggregation systems
• Detailed context in all error messages
• Non-invasive changes that maintain backward compatibility

Original prompt

Add simple logging statements to the handler in packages/sds/src/api/com/sds/repo/uploadBlob.ts to help identify the source of 4xx or 5xx errors. The logging statements should clearly log each step of the process, especially around any external calls, validation, and exception handling. Focus on logging when entering and exiting main functions or handlers, as well as when errors occur.

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Note

Introduces comprehensive logging to improve diagnosability of blob uploads, covering repository resolution, permission checks, and blob lifecycle.

• Instrument uploadBlob with entry/exit logs and context (user DID, repo DID, MIME, CID/size)
• Add logs around shared repo permission checks, OAuth scope assertions, and account lookups
• Log upload start/completion, timeout detection, and transaction steps (track untethered, record lookup, permanence)
• Wrap critical sections in try/catch to log and rethrow errors; no business logic changes
• Standardize messages with [uploadBlob] prefix for filtering

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Project	Deployment	Review	Updated (UTC)
sds-demo	Ready	Preview, Comment	Jan 25, 2026 8:16pm

[Copilot]

Pull request overview

This PR adds comprehensive structured logging to the uploadBlob handler to improve error diagnosis in production. The handler lacked visibility into failure points, making 4xx/5xx errors difficult to debug.

Changes:

• Added step-by-step logging with [uploadBlob] prefix throughout the handler execution path
• Added logging for entry/exit points, permission checks, account operations, blob operations, transaction flow, and error contexts
• All error catch blocks now log relevant context before re-throwing

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[aspiers]

@copilot You didn't run prettier!

[Copilot]

@copilot You didn't run prettier!

Fixed in commit 0c92ca8. Prettier formatting has been applied to the file.

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