[Feature]: Advanced Authorization Framework with Role-Based Access Control

[akargi]

Problem / motivation

Multi-signature trading, custodial accounts, and institutional integrations require sophisticated authorization models. Current auth implementation doesn't support delegated trading permissions, time-based restrictions, or transaction approval workflows that institutional traders demand.

Proposed solution

Implement a comprehensive authorization framework:

1. Role Hierarchy System - Define roles (Admin, Trader, Auditor, Custodian) with granular permissions
2. Policy Engine - Declarative access control with conditions:
   • Time windows (trading hours only)
   • Transaction limits (max trade value per day)
   • Token restrictions (whitelisted pairs only)
   • Rate limits (max trades per minute)
3. Delegation Manager - Enable permission delegation with expiration and approval chains
4. Multi-Signature Policies - Require M-of-N signatures for high-value trades
5. Audit Logging - Immutable access logs with off-chain storage
6. Threshold Manager - Dynamic thresholds based on market conditions
7. Stellar Signers Integration - Leverage Stellar's signer framework for on-chain authorization
8. API Key Management - Scoped API keys with fine-grained permissions and rotation policies

Acceptance Criteria:

• Support 5+ hierarchical roles with policy composition
• Enforce complex policies in < 10ms
• Complete audit trail for all permission changes
• Support Stellar on-chain signers natively

Related area

Auth / authorization

Alternatives considered

1. Simple role-based access - insufficient for institutional requirements
2. External IAM integration - adds complexity without Stellar-specific optimizations

Contribution

• I am willing to help implement this feature.

[Peculiarr7]

Hi! I’m a full-stack developer with a strong blockchain background, and I’m confident I can resolve this issue quickly and effectively. I’ll deliver a clean, reliable solution with immediate attention to detail, ensuring it’s completed as soon as possible. Please assign it to me—I’m ready to get started right away.