feat(fees): v0.0.22 — compute_fee_for_action impl complete + mock runtime integration tests E2E (10 scenarios)
Phase 2.4 FEES pallet REAL IMPL canonical. Dispatchable compute_fee_for_action
wire-up vendor compute_fee() pure fn call + AccountFees<StorageMap> saturating
arithmetic + event emission. Mock runtime + 10 integration tests E2E pattern
v0.0.18 mirror (Phase 2.1 PROVENANCE).
## Real impl canonical 5-step OCAFB-5
1. ensure_signed canonical
2. Vendor compute_fee(base, hw, sub, action) pure fn call
3. Handle entitlement blocked (fee==u64::MAX → Err(EntitlementLocked))
4. AccountFees<StorageMap> saturating update canonical
5. Emit FeeCharged event canonical
Pure helper Pallet::<T>::query_fee() para Runtime API v0.0.23 consumer.
## Consumer pattern canonical
Mathi OitFeeSchedule consumed CLIENT-SIDE — tx submitter queries Mathi per-user
→ assembles tx con (hw, sub) baked → submits. Pattern análogo Phase 2.1
attest_asset (ValidationAttestation pre-assembled client-side).
## 10 integration tests E2E
- scenario_1: Pi5 Write subsidy 90% → fee=1000 (Inmutable #16)
- scenario_2: Ultra Write Pro multiplier → fee=1500
- scenario_3: Read always free → fee=0 (Inmutable #37)
- scenario_4: Free Compute blocked → Err(EntitlementLocked)
- scenario_5: Pro Compute unlocked → fee=112
- scenario_6: Ultra Compute Ultra premium → fee=2000 (Inmutable #18)
- scenario_7: Storage accumulates Write×3 → total_paid=3375, count=3
- scenario_8: ChainAction ordinal stable wire (Read=0..Transfer=3)
- scenario_9: Inmutable #16 lobo blanco — Pi5 fee 1000 < Ultra fee 20000
- scenario_10: 5-step OCAFB-5 walkthrough explicit Pre/Post assertions
## FRAME canonical pattern
Events NOT emitted on Err path (FRAME revierte events on dispatch error).
EntitlementBlocked event variant retained para Phase 2.5 future
with_storage_layer pattern. Caller infers from Err return.
## Files canonical
- EDIT: crates/origin-chain-fees/src/lib.rs (real dispatchable impl + query_fee helper)
- NEW: crates/origin-chain-fees/src/mock.rs (80 LOC mock runtime pattern v0.0.18)
- NEW: crates/origin-chain-fees/src/tests_integration.rs (290 LOC, 10 tests)
- EDIT: crates/origin-chain-types/src/tiers.rs (FRAME derives Encode/Decode/TypeInfo/MaxEncodedLen para HardwareTier + SubscriptionTier + AssetQualityTier)
- EDIT: CHANGELOG.md (v0.0.22 entry comprehensive)
## Verification
- cargo test -p origin-chain-fees — 32 tests verde, 0 failures
- cargo test --workspace — 137 tests verde workspace, 0 failures
- Zero compile errors workspace-wide
🛠️ Phase 2.4 real impl canonical. Runtime API v0.0.23 next ship.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
davidherranandClaude Opus 4.7
e935233ba6