Prerank Engine

What is Prerank Engine?

The Prerank Engine is the first validation layer in the Intenus intent-based trading pipeline. It acts as an intelligent filter that validates solver-submitted solutions against user-defined constraints before forwarding them to expensive AI ranking services.

The Prerank Engine runs inside a verifiable enclave (Trusted Execution Environment – TEE), ensuring that all pre-ranking operations are transparent, secure, and fully attestable within a trusted environment. It serves as one of the two orchestrartor of the Universal Solvers Network

Read more Ranking Strategies

The Challenge It Solves

• High computational costs (AI ranking is expensive)

• Exposure to invalid solutions that could fail or lose user funds

How Prerank Engine Helps?

1. Monitors Sui blockchain for IntentSubmitted and SolutionSubmitted events

2. Fetches encrypted intent/solution data from Walrus decentralized storage

3. Performs instant constraint-based validation (deadline, slippage, gas limits, routing rules)

4. Filters out invalid solutions before they reach AI ranking

5. Provide features vector for ranking calculations.

Why Pre-ranking?

Without pre-filtering:

• Low-quality solutions waste ranking resources

• Invalid solutions delay processing

• Malicious submissions can spam the system

• Every solution costs gas/compute to evaluate

With pre-ranking:

• Only valid solutions reach full ranking

• Faster processing for quality solvers

• Economic spam prevention

• Efficient resource utilization

Architecture

Pre-Ranking Engine Architeture

┌─────────────────────────────────────────────────────────────────┐
│                        Sui Blockchain                           │
│  IntentSubmitted Events │ SolutionSubmitted Events              │
└────────────┬────────────┴──────────────────┬───────────────────┘
             │                                │
             ▼                                ▼
    ┌────────────────┐              ┌────────────────┐
    │  Sui Service   │              │  Sui Service   │
    │  (Event Poll)  │              │  (Event Poll)  │
    └────────┬───────┘              └────────┬───────┘
             │ Emit                           │ Emit
             │ intent.submitted               │ solution.submitted
             ▼                                ▼
    ┌──────────────────────────────────────────────────┐
    │         Processing Service (Orchestrator)        │
    │  - Manages solution windows                      │
    │  - Coordinates instant preranking workflow       │
    └──────┬────────────────────────────────┬──────────┘
           │                                 │
           ▼                                 ▼
  ┌─────────────────┐             ┌──────────────────────┐
  │ Walrus Service  │             │  PreRanking Service  │
  │ - Fetch Intent  │             │  - Validate Now      │
  │ - Fetch Solution│             │  - Dry Run           │
  │ - Decrypt Data  │             │  - Extract Features  │
  └────────┬────────┘             └──────────┬───────────┘
           │                                  │
           ▼                                  ▼
  ┌──────────────────────────────────────────────────────┐
  │              Redis Storage Service                    │
  │  - Store intents/solutions (1h TTL)                  │
  │  - Event cursor (crash recovery)                     │
  │  - Ranking queue (AI service input)                  │
  └──────────────────────────────────────────────────────┘
                           │
                           ▼ Window closes
                  ┌──────────────────┐
                  │  AI Ranking API  │
                  │  (External)      │
                  └──────────────────┘

Validation Pipeline

The engine validates solutions against IGS (Intenus General Standard) constraints defined by users:

Constraint Type	What It Protects	Real-World Example
Deadline	Time-bound execution	"Must execute within 5 minutes of submission"
Max Slippage	Price deviation tolerance	"Price can move maximum 2% (200 basis points)"
Min Outputs	Guaranteed receive amounts	"Must receive at least 950 USDC (not less)"
Max Inputs	Spending ceiling protection	"Don't spend more than 100 SUI"
Gas Budget	Transaction cost limits	"Gas fees cannot exceed $2 worth of SUI"
Routing Rules	Protocol safety controls	"Only use Cetus DEX, block risky protocols"
Limit Price	Price boundary enforcement	"Only execute if SUI ≥ $3.00"

Validation Strategy

• Fast-fail approach: Check cheap constraints first (deadline, routing) before expensive ones (dry-run simulation)

• Two-phase validation: Pre-flight checks → Blockchain simulation → Output verification

Optional Quality Signals

Additional factors that improve ranking odds:

✨ High Solver Reputation: Previous performance > 8.0/10 ✨ Competitive Output: > 5% better than benchmark ✨ Low Gas Cost: < median gas for similar intents ✨ Fast Execution: Expected time < intent deadline ✨ Novel Strategy: Unused approach in last 100 similar intents

Spam Prevention

Economic Barriers

Submission Requirements:

• Minimum stake: 1,000+ SUI

• Per-submission gas fee: 0.001+ SUI

• Reputation at risk: Poor solutions hurt future chances

Effect: Makes spam economically unprofitable

Rate Limiting

Per-Solver Limits:

• Maximum 5 solutions per intent

• Maximum 100 solutions per hour

• Cooldown after rejected solutions

Effect: Prevents solution flooding

Quality Penalties

Repeated Rejections:

• 3 rejected solutions in a row: 1-hour cooldown

• 10 rejected solutions in 24h: Reputation penalty

• 50 rejected solutions in 7 days: Temporary suspension

Effect: Incentivizes quality over quantity

Different intent types have specialized checks:

Learn More

• Full Ranking Engine

• Solution Specifications

• Solver Network