SC-021 — Implement Emergency Pause & Circuit Breaker Framework

[dDevAhmed]

SC-021 — Implement Emergency Pause & Circuit Breaker Framework

📚 Overview

TruthBounty is a protocol responsible for securing user funds, protocol governance, and truth verification. While decentralisation is the long-term objective, the protocol must also provide controlled emergency mechanisms to minimise damage during unforeseen security incidents.

This issue implements the Emergency Pause & Circuit Breaker Framework, allowing governance-approved emergency actors to temporarily suspend critical protocol operations while preserving user assets, protocol integrity, and transparent recovery procedures.

The emergency framework is designed as a last-resort safety mechanism, not a permanent administrative control.

---

🧠 Background

Even well-audited protocols may experience:

• zero-day vulnerabilities
• oracle failures
• governance exploits
• bridge compromises
• token exploits
• unexpected economic attacks

Without an emergency response mechanism:

• attacks continue until governance reacts
• additional protocol funds may be lost
• users cannot be protected quickly

A carefully designed circuit breaker reduces impact while remaining transparent and governance-controlled.

---

🎯 Objectives

Implement a protocol-wide emergency management framework that:

• pauses selected protocol functions
• preserves user assets
• limits attack propagation
• records emergency actions
• supports controlled recovery
• maintains governance transparency

---

🧩 Technical Scope

1. Emergency Controller

Implement an Emergency Controller contract responsible for:

• activating protocol pause
• lifting protocol pause
• exposing pause state
• recording emergency actions

The controller becomes the single source of truth for emergency status.

---

2. Pause Levels

Support multiple emergency levels.

Level 0

Normal protocol operation.

---

Level 1

Pause high-risk operations:

• new claim creation
• staking
• verification submission

Allow:

• viewing data
• governance review

---

Level 2

Pause financial operations:

• reward distribution
• treasury transfers
• withdrawals

Read-only operations remain available.

---

Level 3

Global emergency shutdown.

Only governance recovery operations remain available.

---

3. Function Protection

Critical protocol functions should verify pause status.

Examples:

createClaim()

submitVerification()

stake()

withdraw()

claimReward()

settleClaim()

Protected operations should revert during active pause.

---

4. Emergency Roles

Support distinct emergency authorities.

Examples:

• Emergency Council
• DAO Governance
• Timelock Controller

Each role should have clearly defined permissions.

---

5. Emergency Audit Trail

Record:

• pause level
• timestamp
• initiator
• reason
• proposal reference
• recovery timestamp

History must remain immutable.

---

6. Recovery Procedure

Implement governance-controlled recovery.

Recovery should include:

• validation checks
• staged reopening
• event emission
• protocol health verification

Recovery must never bypass governance.

---

7. Events

Emit:

event EmergencyPauseActivated(
    uint8 level,
    address executor,
    string reason
);

event EmergencyPauseLifted(
    uint8 previousLevel,
    address executor
);

event EmergencyActionRecorded(
    bytes32 actionId
);

---

8. Read Interface

Expose:

• current pause level
• pause history
• authorised emergency roles
• recovery status

Support efficient off-chain indexing.

---

9. Future Compatibility

Framework should support:

• module-specific pauses
• cross-chain emergency coordination
• automated monitoring integration
• guardian decentralisation

without redesign.

---

🏗 Architectural Considerations

Emergency controls should remain isolated from business logic.

Protocol modules should query the Emergency Controller rather than maintaining independent pause states.

This ensures consistent behaviour across the protocol.

---

🔐 Security Considerations

Protect against:

• malicious pause activation
• unauthorised recovery
• permanent denial-of-service
• replay attacks
• governance bypass
• privilege escalation

Emergency powers should be narrowly scoped and fully auditable.

---

⚡ Performance Considerations

Optimise:

• pause state lookups
• emergency activation
• recovery operations

Pause checks should introduce minimal gas overhead.

---

🧪 Testing Requirements

Unit Tests

Verify:

• pause activation
• pause removal
• level transitions
• access control
• event emission

---

Integration Tests

Verify interaction with:

• Claims Engine
• Treasury
• Rewards
• Staking
• Settlement
• Governance

---

Security Tests

Verify:

• unauthorised pause rejected
• unauthorised recovery rejected
• protected functions blocked
• read operations remain available

---

Invariant Tests

Verify:

• paused protocol cannot execute restricted operations
• protocol state remains consistent
• recovery restores functionality correctly

---

Fuzz Tests

Randomise:

• pause levels
• governance actions
• user interactions
• recovery timing

Verify deterministic behaviour.

---

Gas Tests

Benchmark:

• pause lookup
• activation
• recovery

Document gas usage.

---

✅ Acceptance Criteria

• Emergency Controller implemented.
• Multi-level pause system operational.
• Protected functions enforce pause checks.
• Emergency role management completed.
• Audit trail recorded.
• Governance-controlled recovery implemented.
• Events emitted correctly.
• Read interface available.
• Unit tests completed.
• Integration tests completed.
• Invariant tests pass.
• Fuzz tests pass.
• Gas benchmarks documented.
• CI passes successfully.

---

📖 References

• TruthBounty Protocol V2 Specification
• OpenZeppelin Pausable
• OpenZeppelin AccessControl
• OpenZeppelin TimelockController

---

⛓ Dependencies

Depends On

• SC-013 — Governance Controller
• SC-019 — Governance Parameter Management Framework
• SC-020 — Protocol Upgrade & Version Management Framework

Blocks

• Mainnet Deployment
• Security Audit Sign-off
• Incident Response Playbooks
• Operational Monitoring

---

🏷 Labels

contracts

security

governance

architecture

protocol-critical

web3

complexity-high

stellar-wave

---

📊 Complexity

High

This issue implements the protocol's emergency defence layer, enabling rapid, governance-controlled response to critical incidents while maintaining transparency, protecting user assets, and preserving protocol integrity.

---

⏱ Estimated Effort

4–5 days

Includes:

• emergency controller
• pause framework
• role management
• recovery workflow
• testing
• documentation
• gas optimisation

---

🚀 Definition of Done

This issue is complete when:

• Emergency Controller implemented.
• Multi-level pause framework operational.
• Protected functions enforce pause checks.
• Emergency roles configured.
• Recovery workflow implemented.
• Audit history recorded.
• Events emitted correctly.
• Read interface available.
• Unit tests pass.
• Integration tests pass.
• Invariant tests pass.
• Fuzz tests pass.
• Gas benchmarks documented.
• CI passes successfully.
• Protocol invariants remain preserved during emergency operations.
• Documentation updated.
• Pull Request reviewed and approved.

[VeronicDev]

@VeronicDev has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello maintainer pls assign me this.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @VeronicDev to this issue.

[flexocode442]

@flexocode442 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello Team I'd love to be assigned this issue. As a backend developer, I've experience across many frameworks, and I'm confident I'll be able to resolve this. Looking forward to it. Thanks

ℹ️ Repo Maintainers: To accept this application, review their application or assign @flexocode442 to this issue.

[drips-wave]

Congratulations, @flexocode442! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @flexocode442: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊