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Milestones Authorization Matrix Implementation Summary

📌 Overview

This document provides a comprehensive summary of the exhaustive authorization matrix test suite for milestone operations in the TalentTrust Escrow Soroban contract (Issue #21).

The test suite systematically verifies that all milestone-related actions enforce strict role-based authorization rules across all 4 release authorization modes (ClientOnly, ArbiterOnly, ClientAndArbiter, and MultiSig), validate contract state transitions, respect administrative pause controls, and permit unauthenticated access for read-only queries.

🛡️ Role-Based Authorization Matrix

Action Admin Client Freelancer Arbiter Stranger Deny Error Code
approve_milestone_release (ClientOnly) ❌ ✅ ❌ ❌ ❌ EscrowError::UnauthorizedRole
approve_milestone_release (ArbiterOnly) ❌ ❌ ❌ ✅ ❌ EscrowError::UnauthorizedRole
approve_milestone_release (ClientAndArbiter) ❌ ✅ ❌ ✅ ❌ EscrowError::UnauthorizedRole
approve_milestone_release (MultiSig) ❌ ✅ ✅ ❌ ❌ EscrowError::UnauthorizedRole
release_milestone (ClientOnly) ❌ ✅ ❌ ❌ ❌ EscrowError::UnauthorizedRole
release_milestone (ArbiterOnly) ❌ ❌ ❌ ✅ ❌ EscrowError::UnauthorizedRole
release_milestone (ClientAndArbiter) ❌ ✅ ❌ ✅ ❌ EscrowError::UnauthorizedRole
release_milestone (MultiSig) ❌ ✅ ✅ ❌ ❌ EscrowError::UnauthorizedRole
submit_work_evidence ❌ ❌ ✅ ❌ ❌ EscrowError::UnauthorizedRole
refund_unreleased_milestones ❌ ✅ ❌ ❌ ❌ EscrowError::UnauthorizedRole
get_milestones ✅ ✅ ✅ ✅ ✅ (Read-only query, no auth required)
get_milestone ✅ ✅ ✅ ✅ ✅ (Read-only query, no auth required)
get_milestone_approvals ✅ ✅ ✅ ✅ ✅ (Read-only query, no auth required)
get_approval_deadline ✅ ✅ ✅ ✅ ✅ (Read-only query, no auth required)
get_work_evidence ✅ ✅ ✅ ✅ ✅ (Read-only query, no auth required)
is_milestone_overdue ✅ ✅ ✅ ✅ ✅ (Read-only query, no auth required)

🧪 Test Suite Architecture

Located in contracts/escrow/src/test/milestones_auth_matrix.rs, the test suite is structured into 6 distinct sections:

Section 1: approve_milestone_release Authorization Matrix

  • test_approve_milestone_release_matrix_client_only: Confirms only Client can approve in ClientOnly mode; Freelancer, Arbiter, Admin, and Stranger are denied with EscrowError::UnauthorizedRole.
  • test_approve_milestone_release_matrix_arbiter_only: Confirms only Arbiter can approve in ArbiterOnly mode; all other roles are denied.
  • test_approve_milestone_release_matrix_client_and_arbiter: Confirms both Client and Arbiter can approve; non-signers are denied.
  • test_approve_milestone_release_matrix_multisig: Confirms both Client and Freelancer can approve; non-participants are denied.

Section 2: release_milestone Authorization Matrix

  • test_release_milestone_matrix_client_only: Validates release by Client after approval, verifying unauthorized execution attempts by other roles are rejected.
  • test_release_milestone_matrix_arbiter_only: Validates release by Arbiter after approval.
  • test_release_milestone_matrix_client_and_arbiter: Validates release by either Client or Arbiter after requisite approval.
  • test_release_milestone_matrix_multisig: Validates release by either Client or Freelancer after dual approvals are recorded.

Section 3: submit_work_evidence Authorization Matrix

  • test_submit_work_evidence_matrix: Asserts that only the designated Freelancer can submit deliverable evidence links; Client, Arbiter, Admin, and Stranger calls fail with EscrowError::UnauthorizedRole.

Section 4: refund_unreleased_milestones Authorization Matrix

  • test_refund_unreleased_milestones_matrix: Asserts that only the Client can trigger unreleased milestone refunds.

Section 5: Unauthenticated Read-Only Queries

  • test_read_only_milestone_queries_auth_free: Iterates over all 5 roles (including Stranger) and asserts unauthenticated read access to:
    • get_milestones
    • get_milestone
    • get_milestone_approvals
    • get_approval_deadline
    • get_work_evidence
    • is_milestone_overdue

Section 6: State Gates & Pause Control Guards

  • test_milestone_actions_invalid_state_gates: Asserts that invoking milestone actions (approve_milestone_release, release_milestone, submit_work_evidence, refund_unreleased_milestones) on contracts in Created (unfunded) or Completed states returns Error::InvalidState or EscrowError::InvalidState.
  • test_milestone_actions_blocked_when_paused: Verifies that when the contract is paused by the admin (escrow.pause(&admin)), all state-modifying milestone actions return EscrowError::ContractPaused, and resume normal operations upon unpause(&admin).

📁 File Modifications

  1. contracts/escrow/src/test/milestones_auth_matrix.rs [NEW]
    • 530 lines of clean, modular Soroban Rust test code.
  2. contracts/escrow/src/test/mod.rs [MODIFY]
    • Registered mod milestones_auth_matrix; module declaration.

🚀 Git Commit & Remote Synchronization

  • Branch: test/milestones-21-authmatrix
  • Commit Message: test(escrow): add exhaustive milestone authorization matrix test suite (#21)