governance-contract: admin roles and multi-sig admin actions

[memplethee-lab]

Labels: type:feature, priority:high, module:governance, security

Description
The README calls for "multi-signature admin" and "role assignments." Governance owns role management and gates sensitive protocol actions behind M-of-N approvals.

Direction

• Implement role assignment/removal (Admin, Upgrader, TreasuryManager, Pauser) using shared auth (Implement shared auth, access-control roles, and pause guard #5).
• Implement a multi-sig proposal flow: propose(action), approve(proposal_id), execute(proposal_id) requiring M-of-N admin approvals before execution.
• Store threshold M and admin set N.

Acceptance Criteria

• Roles can be granted/revoked only by admins.
• A proposal executes only after reaching the approval threshold.
• An approver cannot approve the same proposal twice.
• Below-threshold execution attempts are rejected.
• Tests cover propose/approve/execute, threshold, and duplicate-approval.

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[giftexceed]

I'd like to work on this issue.

I'm a blockchain developer with experience building Rust smart contracts, governance systems, role-based access control, and multi-signature authorization flows. I focus on secure state management, deterministic contract behavior, and comprehensive automated testing.

For this issue, I will implement role assignment and revocation for the required governance roles, build a secure M-of-N multi-signature proposal workflow, prevent duplicate approvals, enforce execution thresholds, and add thorough tests covering authorization, proposal lifecycle, threshold validation, and duplicate-approval scenarios. I'll ensure the implementation is modular, secure, and aligned with the existing governance architecture.

[blvckmamba81-sketch]

Hi! I'd like to take on this issue. I have experience working with smart contract access control and governance patterns, and I'm comfortable implementing secure role-based permissions. I'll carefully design and test the admin roles and multi-signature authorization flow to ensure the solution is secure, maintainable, and aligned with the project's requirements.

[grantfox-oss]

🦊 GrantFox — @blvckmamba81-sketch 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 #19)
2. Your PR will be reviewed by the SourceXXL maintainers

Good luck! Track your progress on GrantFox.