Role-Based Emergency Pause & Circuit Breaker

[meshackyaro]

Description

This issue aims to address the implementation of Role-Based Emergency Pause & Circuit Breaker.

The core objective is to: Implement an authorized pausable/circuit-breaker mechanism with granular role checks that halts sensitive entrypoints during incidents without stranding user funds.

By completing this feature, we will ensure that the TrustFlow protocol maintains its high standards for security, usability, and decentralized logic. This issue requires careful attention to the Smart Contracts architecture and adherence to the existing project conventions.

When picking up this issue, please ensure you document any new dependencies or architectural decisions made during development.

Component

Smart Contracts

Difficulty

🔴 Hard

Tasks

• Review Soroban architecture and soroban-cli usage
• Implement Rust logic for: Role-Based Emergency Pause & Circuit Breaker
• Write comprehensive unit tests in Rust
• Ensure proper event emission for indexing
• Run cargo fmt and cargo clippy
• Verify soroban contract build successfully compiles to WASM without bloating size

Acceptance Criteria

• Feature accurately implements the objective: Implement an authorized pausable/circuit-breaker mechanism with granular role checks that halts sensitive entrypoints during incidents without stranding user funds.
• Any PR that introduces Rust errors is automatically blocked
• CI pipeline runs in under 3 minutes per PR
• Code is properly reviewed and approved by codeowners

Estimated Time

1-3 days

[OTimileyin]

Hi maintainer could you please assign me this issue.

[Securify001]

Hi. I am a web3 fullstack developer. Kindly assign this issue to me. I have years of Rust and smart contract development experience with deep expertise in Soroban, access control patterns, circuit breaker mechanisms, and building secure pausable systems that protect user funds while maintaining emergency response capabilities across production-grade DeFi protocols.

My approach begins by implementing a granular role-based pause system with three key components: a Pausable storage struct tracking paused status per function category (e.g., FUNCTION_PAUSED for deposit, withdraw, trade, claim), role-based authorization using HasRole checks (PAUSER_ROLE for pausing, UNPAUSER_ROLE for resuming, ADMIN_ROLE for configuration), and a circuit breaker that automatically triggers on anomalous conditions (e.g., excessive losses, suspicious withdrawal patterns). I will add modifiers to sensitive entrypoints that check require_not_paused() and require_role() before execution, ensuring halt operations do not block emergency fund withdrawals or user balance views, with clear error types like Error::Paused and Error::Unauthorized.
I will emit comprehensive events (Paused, Unpaused, CircuitBreakerTriggered) with metadata (caller, timestamp, function category) for indexing and monitoring, and implement a timelock mechanism that requires multi-signature or delayed execution for critical pause/resume actions. My testing strategy includes unit tests for each role's pause capabilities, circuit breaker triggers (simulating loss thresholds, repeated failures), the combination of pause + emergency withdrawal ensuring funds remain accessible, and event emission verification. I will adhere to Soroban best practices by using env.storage().instance() for pause state, minimizing storage reads/writes for gas optimization, and ensuring WASM size stays lean with cargo build --target wasm32-unknown-unknown --release.

I am ready to deliver this comprehensive pause mechanism within 4-5 hours with full test coverage, cargo fmt and clippy compliance, and documentation of all architectural decisions

[Wilfred007]

Hi Maintainer
I've looked through the requirements of this task and it fits into my areas of strength, when assigned I will work on it within the expected timeline.

[grantfox-oss]

🦊 GrantFox — @Securify001 has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #45)
2. Your PR will be reviewed by the trustflow-protocol maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@Securify001's PR #53 was approved and merged by @meshackyaro.

🏆 @Securify001: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (344 total points). Track your full progress on GrantFox.

👏 Great work, @Securify001! Keep contributing to trustflow-protocol.