Implement Circuit Breaker and Emergency Halt Governance Path

[grantfox-oss]

Description:

Introduce a high-severity safety control that can halt buyback execution during abnormal market or protocol conditions.

Tasks:

• Implement circuit-breaker checks for volatility spikes, failed settlement streaks, and oracle divergence thresholds
• Add governance-controlled emergency_halt_campaign and clear_emergency_halt entrypoints
• Ensure halted campaigns block execution but preserve read/query behavior
• Add tests for trigger conditions, unauthorized halt attempts, and safe recovery flow

Acceptance Criteria:

Emergency halt behavior is governance-controlled, tamper-resistant, and validated by negative and recovery tests.

[devJaja]

Can I work on this issue please

[ChukwuemekaP1]

Hey, I'd like to take this on.

I've worked on Soroban smart contracts and understand the stakes of a safety control like this — a circuit breaker that can be bypassed by unauthorized actors or that accidentally blocks read access is worse than not having one at all.

I'll implement circuit-breaker checks for volatility spikes, failed settlement streaks, and oracle divergence thresholds, add governance-controlled emergency_halt_campaign and clear_emergency_halt entrypoints that reject unauthorized callers cleanly, and ensure halted campaigns block execution while keeping all read/query paths intact. Tests will cover each trigger condition, unauthorized halt attempts that must fail, and the full safe recovery flow — so the contract's safety guarantees are proven by negative tests, not just happy path. Can you assign this to me?

[Chucks1093]

How I would approach this is by implementing the halt flag check as the first gate in the execution path so a triggered circuit breaker blocks buyback immediately without affecting any read or query operations.

I will also make sure unauthorized halt attempts and recovery flow are covered by negative tests before the PR is opened.

[gelluisaac]

I’m interested in tackling this! I have a strong background in smart contract development and full-stack systems, so I'm well-equipped to handle the requirements here. Could you please assign this to me?

[Nemenwq]

Hello maintainer, Please can I be assigned this. ETA: 2HRS