[Contracts] agent_registry average_rating truncates and individual Rating records are never persisted

[david87131]

Why this matters

AgentInfo::average_rating returns total_score / total_ratings as a truncated integer, so a 4.5 average reads as 4 with a systematic downward bias. Separately, rate_agent only stores a boolean at DataKey::AgentRating(agent, rater); the Rating struct (score, rater, timestamp) is never written, so the type is dead code and individual ratings can never be audited. There is also no getter exposing the average rating.

Acceptance criteria

• average_rating returns a scaled value (e.g. x100) or otherwise avoids silent truncation, documented in code
• rate_agent persists the full Rating record so individual scores are auditable
• A getter exposes an agent's average rating and individual ratings
• A test asserts a 4.5-style average is represented without loss

Files to touch

• contracts/agent_registry/src/types.rs
• contracts/agent_registry/src/agent.rs

Out of scope

• Time-decayed reputation
• Migrating existing boolean flags

[david87131]

Superseded by the consolidated contract audit issues (#67-#104) which cover the same findings more comprehensively. Closing to avoid duplicate coverage.

[Itodo-S]

Please let me work on this issue; i can handle it.

[patrickNwafo]

I'd love to take on this issue. I have experience working with data modeling, smart contract logic, and testing, and I believe this fix will significantly improve the reliability and transparency of the agent reputation system. My approach would be to eliminate rating precision loss by introducing a properly scaled average, persist complete Rating records for auditability, expose clean getter methods for both averages and individual ratings, and add comprehensive tests to ensure values like 4.5 are represented accurately. I'm comfortable working within the existing contract structure and keeping the implementation aligned with the project's scope.

[grantfox-oss]

🦊 GrantFox — @patrickNwafo has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #94)
2. Your PR will be reviewed by the vespera-labs maintainers

Good luck! Track your progress on GrantFox.

[patrickNwafo]

Hello @david87131 please i already fixed this issue, kindly review and merge, thank you