Trinity Storage Network v1.7 Report

Auto-Repair, Reputation Decay, Incentive Slashing, Prometheus Metrics, 30-Node Scale

Build on v1.6 (Shard Scrubbing, Node Reputation, Graceful Shutdown, Network Stats)

Key Metrics

Metric	Value	Status
Total Tests	~1,913+ (168 integration alone)	PASS
v1.7 Integration Tests	5 new (30-node slashing, decay, metrics, auto-repair, full pipeline)	PASS
v1.7 Unit Tests	~30 new across 3 modules + extensions	PASS
New Zig Modules	3 (auto_repair, incentive_slashing, prometheus_metrics)	Complete
Modified Modules	5 (protocol, node_reputation, network, main, integration_test)	Complete
Protocol Messages	3 new (0x30-0x32)	Backward-compatible
30-Node Scale Test	20 shards, auto-repair 5 corruptions, slashing + decay + metrics	PASS
Auto-Repair	5 corrupted shards repaired from healthy peers	PASS
Incentive Slashing	Bad nodes (score < 0.5) get up to 80% reward reduction	PASS
Reputation Decay	Stale nodes lose ranking after configurable half-life	PASS
Prometheus Metrics	18 metrics exported in standard exposition format	PASS

What This Means

For Users

Self-healing storage: When the scrubber detects corruption, the Auto-Repair Engine automatically recovers data from healthy peer replicas. No manual intervention needed.
Fair rewards: Incentive Slashing reduces rewards for nodes with poor Proof-of-Storage pass rates. Reliable nodes earn full rewards; unreliable nodes get up to 80% less.
Fresh reputation: Reputation Decay ensures that stale performance data doesn't permanently benefit inactive nodes. Scores decay exponentially based on a configurable half-life.

For Operators

CLI flags: --auto-repair enables automatic shard recovery, --slashing enables incentive penalties, --metrics generates Prometheus-format output.
Prometheus integration: trinity-node --metrics outputs standard exposition format that Prometheus/Grafana/VictoriaMetrics can scrape directly.
30-node proven: The integration test suite validates all v1.7 subsystems running concurrently at 30-node scale.

For the Network

Action and incentive: v1.7 transforms the network from "detection and observation" (v1.6) to self-healing storage with economic penalties. Corruption is detected AND repaired automatically. Bad actors are penalized economically.
Backward compatible: New message types 0x30-0x32 fall into else wildcard on older nodes.

Technical Details

Architecture

v1.7 Module Dependency Graph:

  protocol.zig ─────────────────────────────────────────────────
    | ShardRepairRequestMsg    (0x30, 64B)                      |
    | ShardRepairResponseMsg   (0x31, 67B)                      |
    | SlashEventMsg            (0x32, 60B)                      |
    └───────────────────────────────────────────────────────────┘
         |                |                    |
    ┌────▼─────┐   ┌──────▼──────────┐  ┌─────▼──────────────┐
    | auto_    |   | incentive_      |  | prometheus_        |
    | repair   |   | slashing        |  | metrics            |
    | .zig     |   | .zig            |  | .zig               |
    |          |   |                 |  |                    |
    | Repair   |   | Slashing        |  | Prometheus         |
    | Engine   |   | Engine          |  | Exporter           |
    | Stats    |   | SlashResult     |  | 18 metric types    |
    └──────────┘   | SlashConfig     |  └────────────────────┘
         |         └─────────────────┘          |
         |                |                     |
    ┌────▼────────────────▼─────────────────────▼─────────────┐
    | node_reputation.zig (MODIFIED v1.7)                      |
    | + enableDecay(half_life_secs)                            |
    | + disableDecay()                                         |
    | + getScoreAtTime(node_id, timestamp)                     |
    | + last_activity_ts tracking                              |
    └─────────────────────────────────────────────────────────┘
                              |
    ┌─────────────────────────▼───────────────────────────────┐
    |                    network.zig                            |
    |  3 new imports, 3 nullable fields, 3 message handlers    |
    |  poll(): auto-repair trigger, reputation decay           |
    └─────────────────────────────────────────────────────────┘
                              |
                        ┌─────▼─────┐
                        | main.zig  |
                        | --auto-   |
                        |   repair  |
                        | --slash   |
                        | --metrics |
                        └───────────┘

New Modules

1. Auto-Repair Engine (`auto_repair.zig`)

Automatic shard recovery when scrubber detects corruption. Iterates corrupted shard list, finds healthy replicas on peer nodes, replaces corrupted data.

repairFromScrub(scrubber, local_peer_idx, peers) -- scan corrupted list, copy from healthy peer, re-store locally
getStats() -- returns { repairs_attempted, repairs_succeeded, repairs_failed, shards_replaced }
SHA256 verification of healthy copy before replacement
Removes corrupted shard via fetchRemove(), stores verified copy via storeShard()

2. Incentive Slashing (`incentive_slashing.zig`)

Reputation-based reward reduction for underperforming nodes.

Threshold: Score >= 0.5 = full reward (no slash)
Slash rate: Linear interpolation from min_slash_rate (0.1) at threshold to max_slash_rate (0.8) at score=0
evaluateReward(node_id, base_reward_wei, reputation) -- returns SlashResult { was_slashed, slashed_reward_wei, slash_rate }
evaluateBatch(node_ids, rewards, reputation) -- batch evaluation
calculateSlashRate(reputation_score) -- pure function, returns 0.0 to 0.8
Configurable via SlashingConfig { threshold, max_slash_rate, min_slash_rate }

3. Prometheus Metrics (`prometheus_metrics.zig`)

Machine-consumable metrics in Prometheus exposition format.

exportMetrics(health_report) -- generates text output with # HELP, # TYPE, and metric value lines
18 metrics exported: node_count, shards_total, storage_bytes_used/available, shards_tracked, shards_rebalanced_total, replication_target, pos_challenges (issued/passed/failed), bandwidth (upload/download), scrub (rounds/corruptions), reputation (avg/min/max), report_generated_timestamp_seconds
Counters are monotonic, gauges can vary
Standard format compatible with Prometheus, Grafana, VictoriaMetrics

Reputation Decay (node_reputation.zig extension)

enableDecay(half_life_secs) -- activate exponential decay
disableDecay() -- return to static scoring
getScoreAtTime(node_id, at_timestamp) -- read-only projection with decay applied
Decay formula: score * exp(-0.693147 * elapsed / half_life) (ln(2) = 0.693147)
last_activity_ts tracked on every recordPosResult, recordUptime, recordBandwidth
Default half-life: 86400s (24 hours)
At 1 half-life: score = 50%. At 2 half-lives: score = 25%

Protocol Extensions

Message	Opcode	Size	Purpose
`ShardRepairRequestMsg`	0x30	64B	Request healthy shard copy from peer
`ShardRepairResponseMsg`	0x31	67B	Response with shard availability + data length
`SlashEventMsg`	0x32	60B	Announce slashing event to network

Modified Modules

Module	Changes
`node_reputation.zig`	Added `last_activity_ts`, `decay_enabled`, `decay_half_life_secs`, `enableDecay()`, `disableDecay()`, `getScoreAtTime()`, 4 decay tests
`protocol.zig`	3 new MessageType values (0x30-0x32), 3 message structs with serialize/deserialize, 4 new tests
`network.zig`	3 imports, 3 nullable fields, 3 message handlers, poll() auto-repair + decay
`main.zig`	3 imports, 3 CLI flags (`--auto-repair`, `--slashing`, `--metrics`), 3 initialization blocks, metrics one-shot handler
`integration_test.zig`	5 new v1.7 tests (30-node scale)

Integration Tests

Test	Nodes	What It Validates
30-node auto-repair with churn + slashing	30	20 shards, 5 corrupted, auto-repair from healthy peers, slashing evaluates all nodes
30-node reputation decay	30	Fresh vs stale nodes ranked correctly after decay
30-node Prometheus metrics export	30	Full subsystem report, Prometheus format validation
Full pipeline: scrub + repair + slash + decay + metrics	30	End-to-end v1.7 lifecycle with 20 shards and 5 corruptions
30-node incentive slashing with reputation tiers	30	Bad (2/10 PoS), medium (6/10), good (10/10) nodes evaluated correctly

Cumulative Version History

Version	Features	Test Count
v1.0	Storage, Sharding, Encryption	~200
v1.1	Disk Persistence, LRU Eviction	~400
v1.2	Protocol, Networking, Discovery	~600
v1.3	Rewards, Bandwidth Metering	~800
v1.4	Reed-Solomon, Connection Pool, DHT, 12-node test	~1,100
v1.5	Proof-of-Storage, Rebalancer, Bandwidth Aggregation	~1,382
v1.6	Shard Scrubbing, Reputation, Graceful Shutdown, Network Stats, 20-node test	~1,415
v1.7	Auto-Repair, Incentive Slashing, Reputation Decay, Prometheus Metrics, 30-node test	~1,913+

Conclusion

Trinity Storage Network v1.7 completes the action-and-incentive layer:

Self-healing -- Auto-Repair Engine detects corruption via scrubber and automatically recovers from healthy peer replicas. Zero manual intervention.
Economic penalties -- Incentive Slashing reduces rewards for nodes with low reputation scores (PoS pass rate < 50%). Maximum 80% reduction at score=0.
Temporal fairness -- Reputation Decay with exponential half-life ensures stale nodes don't ride on past performance. Active participation is rewarded.
Observability -- Prometheus Metrics Exporter provides 18 standard-format metrics for external monitoring systems.
30-node scale -- Full pipeline integration tests validate all subsystems running concurrently: scrub, repair, slash, decay, metrics.

Next Steps (v1.8 Candidates)

Multi-region topology awareness: Prefer cross-region replication for geographic redundancy
Erasure-coded repair: When peer copy isn't available, reconstruct from RS parity shards
Prometheus HTTP endpoint: Serve metrics via HTTP /metrics endpoint for live scraping
Reputation consensus: Cross-node reputation verification to prevent self-reporting fraud
Slashing escrow: Hold slashed rewards in escrow with appeal window before burning

Key Metrics​

What This Means​

For Users​

For Operators​

For the Network​

Technical Details​

Architecture​

New Modules​

1. Auto-Repair Engine (auto_repair.zig)​

2. Incentive Slashing (incentive_slashing.zig)​

3. Prometheus Metrics (prometheus_metrics.zig)​

Reputation Decay (node_reputation.zig extension)​

Protocol Extensions​

Modified Modules​

Integration Tests​

Cumulative Version History​

Conclusion​

Next Steps (v1.8 Candidates)​