nofx/docs/legal/AGPL-VIOLATION-REPORT-ChainOpera-EN.md

AGPL Violation Evidence Report: ChainOpera Plagiarized NOFX

Report Date: December 20, 2025 Reporting Party: NOFX Open Source Community Project URL: https://github.com/NoFxAiOS/nofx Accused Party: ChainOpera (COAI) License Involved: GNU Affero General Public License v3.0 (AGPL-3.0)

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1. Executive Summary

ChainOpera used the equity-history-batch API interface design from the NOFX project, which is protected under AGPL-3.0, on their website trading-test.chainopera.ai, but refused to release their source code, violating the AGPL-3.0 license terms.

ChainOpera claims the interface was "rewritten in Python." This report will prove from both legal and technical perspectives that: even a rewrite still constitutes an AGPL violation.

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2. Timeline Evidence

2.1 AGPL License Effective Date

Item	Details
Effective Time	2025-11-03 19:50:50 (UTC+8)
Commit Hash	e88f84215831d1682e05141eb0c27216dcbd6d47
Author	SkywalkerJi skywalkerji.cn@gmail.com
Commit Message	"Upgrade this repository's open-source license to AGPL."

2.2 equity-history-batch Interface Creation Date

Item	Details
Creation Time	2025-11-03 20:14:39 (UTC+8)
Commit Hash	5af5c0b51773737f166eacea646e3960cee29f59
Author	icy icyoung520@gmail.com
Commit Message	"Enhance leaderboard and security for trader management"

2.3 Key Conclusion

AGPL Effective Time: 2025-11-03 19:50:50
Interface Creation:  2025-11-03 20:14:39
Time Difference:     24 minutes

Conclusion: The equity-history-batch interface has been protected
under AGPL-3.0 since its creation.

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3. Technical Evidence: Code Comparison

3.1 API Path Comparison

Project	API Path	HTTP Method
NOFX	/api/equity-history-batch	POST
ChainOpera	/api/equity-history-batch	POST

Similarity: 100%

3.2 Response Structure Comparison

NOFX Original Code (api/server.go lines 2725-2729):

result["histories"] = histories
result["count"] = len(histories)
if len(errors) > 0 {
    result["errors"] = errors
}

ChainOpera Actual Response (from network request screenshot):

{
  "histories": {...},
  "errors": {},
  "count": 1
}

Comparison Results:

Field	NOFX	ChainOpera	Similarity
histories	✓	✓	100%
errors	✓	✓	100%
count	✓	✓	100%

3.3 History Data Fields Comparison

NOFX Original Code (api/server.go lines 2676-2682):

history = append(history, map[string]interface{}{
    "timestamp":     snap.Timestamp,
    "total_equity":  snap.TotalEquity,
    "total_pnl":     snap.UnrealizedPnL,
    "total_pnl_pct": pnlPct,
    "balance":       snap.Balance,
})

ChainOpera Actual Response:

{
  "timestamp": "2025-12-15T11:21:05.432240",
  "balance": 227.30274403,
  "equity": 227.30274403,
  "total_pnl": 0
}

Comparison Results:

NOFX Field	ChainOpera Field	Similarity
timestamp	timestamp	100%
balance	balance	100%
total_equity	equity	Semantically identical
total_pnl	total_pnl	100%

3.4 Originality Evidence

equity-history-batch is an original design by NOFX:

1. Interface Naming: equity-history-batch is a self-created compound term, not an industry standard
2. Batch Query Design: Supporting multiple trader_id queries simultaneously is a unique design for performance optimization
3. Response Structure: The {histories, errors, count} triplet is an original design
4. Time Filtering: The hours parameter design is an original feature

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4. Legal Rebuttal to the "Python Rewrite" Defense

4.1 AGPL-3.0 Definition of "Modify"

AGPL-3.0 Section 0:

"To 'modify' a work means to copy from or adapt all or part of the work in a fashion requiring copyright permission, other than the making of an exact copy."

Key Point: Rewriting in another language (Go → Python) constitutes "adaptation" and remains subject to AGPL.

4.2 Legal Definition of Derivative Works

AGPL-3.0 Section 0:

A "covered work" means either the unmodified Program or a work based on the Program.

U.S. Copyright Law 17 U.S.C. § 101:

A "derivative work" is a work based upon one or more preexisting works, such as a translation... in which a work may be recast, transformed, or adapted.

Key Point: "Translating" Go code to Python code falls under the legal definition of a "derivative work."

4.3 Why "Rewriting" Still Constitutes Infringement

Argument	Legal Analysis
"We rewrote it in Python"	Language conversion is "adaptation"; derivative works must comply with the original license
"The code is completely different"	Copyright protects expression; API design is a form of expression
"This is generic functionality"	equity-history-batch naming and {histories, errors, count} structure are original designs, not generic functionality

4.4 Case Reference

Oracle v. Google (2021):

The U.S. Supreme Court confirmed that API designs are subject to copyright protection. Even though Google reimplemented the Java API, copyright issues still needed to be considered.

Key Implications:

• The Structure, Sequence, and Organization (SSO) of APIs is protected by copyright
• Even if implemented in a different language, identical API designs may still constitute infringement

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5. Questions ChainOpera Must Answer

ChainOpera has not responded to the following core questions:

#	Question	ChainOpera Response
1	Why is the API path identical to NOFX?	❌ No response
2	Why is the response structure {histories, errors, count} identical?	❌ No response
3	Why are field names timestamp, balance, total_pnl identical?	❌ No response
4	If independently developed, why is it highly consistent with NOFX?	❌ No response
5	Are you willing to release source code per AGPL-3.0?	❌ No response

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6. Git Evidence Verification Method

Anyone can verify the authenticity of the evidence with the following commands:

# Clone the repository
git clone https://github.com/NoFxAiOS/nofx.git
cd nofx

# Verify AGPL license effective date
git show e88f84215831d1682e05141eb0c27216dcbd6d47 --format="%H %ai %s" --no-patch
# Output: e88f8421... 2025-11-03 19:50:50 +0800 Upgrade this repository's open-source license to AGPL.

# Verify equity-history-batch interface creation date
git show 5af5c0b51773737f166eacea646e3960cee29f59 --format="%H %ai %s" --no-patch
# Output: 5af5c0b5... 2025-11-03 20:14:39 +0800 Enhance leaderboard and security for trader management

# View interface implementation code
git show 5af5c0b51773737f166eacea646e3960cee29f59:api/server.go | grep -A 50 "handleEquityHistoryBatch"

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7. Legal Basis Summary

7.1 Key AGPL-3.0 Provisions

Section 13 - Remote Network Interaction:

Notwithstanding any other provision of this License, if you modify the Program, your modified version must prominently offer all users interacting with it remotely through a computer network... an opportunity to receive the Corresponding Source of your version.

7.2 ChainOpera's Violations

Violation	Description
Using AGPL code	Used NOFX's API design
Providing network service	Operating publicly at trading-test.chainopera.ai
Not releasing source code	No source code access provided
Not declaring license	Did not declare use of AGPL code

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8. Evidence List

#	Evidence Type	Description	Preservation Method
1	Git Commit	AGPL license effective record	SHA-1: e88f8421...
2	Git Commit	equity-history-batch creation record	SHA-1: 5af5c0b5...
3	Source Code	api/server.go lines 2542-2732	Git repository
4	Website Screenshot	ChainOpera API response	Blockchain timestamping recommended
5	Network Request	trading-test.chainopera.ai request logs	Notarization recommended

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9. Conclusions

1. Timeline evidence is conclusive: The equity-history-batch interface was created 24 minutes after AGPL took effect; it has been protected since inception.

2. Technical evidence is sufficient: API path, response structure, and field naming are highly consistent, beyond reasonable coincidence.

3. "Python rewrite" defense is invalid:

   • Language conversion constitutes "adaptation"; derivative works must comply with AGPL
   • API design itself is protected by copyright
   • Identical structure, sequence, and organization proves copying, not independent development

4. ChainOpera must either:

   • Release their complete source code in compliance with AGPL-3.0; OR
   • Cease using the related functionality and take down the service

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10. Contact Information

For any questions, please contact:

• GitHub Issues: https://github.com/NoFxAiOS/nofx/issues
• Email: [Project maintainer email]

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Disclaimer: This report only states facts and legal analysis. The NOFX community reserves the right to pursue legal action for infringement.

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Report Version: 1.0 Last Updated: 2025-12-20