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By Stellar Oracle Shield by Sun Zu Lab
Stellar Oracle Shield is an oracle risk monitoring and circuit-breaker infrastructure layer for Stellar and Soroban DeFi. It does not replace price feeds. Instead, it helps protocols decide whether current market conditions are safe enough to trust and act on oracle prices.
1. Open-Source Oracle Health Smart Contract
A Soroban-native smart contract that protocols can query before accepting oracle-dependent transactions such as swaps, liquidations, collateral valuation, minting, or redemption operations. The contract exposes a simple health interface returning a status such as healthy, degraded, or unsafe, together with timestamps and supporting metadata.
Stellar integration: native Soroban smart contract, deployed first on testnet and then mainnet, callable by any Stellar DeFi protocol.
2. Oracle Readiness Score Engine
A real-time analytics engine that evaluates whether the market around a given Stellar asset is liquid, consistent, and robust enough for oracle-dependent protocol actions. The score combines SDEX order book data, Stellar network health metrics, external reference venues, and supported oracle feed data.
Stellar integration: live ingestion from Horizon API, Soroban RPC, SDEX order books, SDEX trades, and on-chain state relevant to oracle-consuming protocols.
3. Open Integrator SDK and Reference Implementations
A Rust and TypeScript SDK enabling Stellar builders to integrate Oracle Shield with minimal effort. The SDK includes example calls, event subscriptions, local test harnesses, and reference integrations for common DeFi use cases.
Stellar integration: SDK built for Soroban contracts and Stellar application developers.
4. Public Oracle Risk Dashboard
A free public dashboard showing live oracle health conditions for monitored Stellar pairs, historical risk events, circuit-breaker state, SDEX liquidity conditions, and on-chain contract state.
Stellar integration: dashboard reads both off-chain ORS data and on-chain Soroban contract state, allowing the community to verify whether published scores and contract state remain aligned.
5. Premium API and Commercial Extensions
A premium API may be developed for protocols and institutions that require higher rate limits, custom alerts, historical analytics, reporting, or enterprise integrations. This commercial layer is not the core funded deliverable. The grant-funded core is the open-source contract, SDK, public dashboard, and Stellar integration layer.
$120.0K
Sun Zu Lab has operated production-grade crypto market data infrastructure since 2021, serving enterprise clients across token issuers, foundations, exchanges, market makers, and asset managers.
Relevant traction:
Real-time market data infrastructure covering 20+ major liquidity venues.
Production experience with order book snapshots, trade feeds, spread, depth, liquidity quality, market impact, and volatility analytics.
Enterprise-grade experience monitoring market maker performance and token liquidity across centralized and decentralized venues.
$3.5M raised from institutional investors, including Ripple, Draper Associates, Elaia Partners, Kima Ventures, and FunFair Ventures.
Existing quantitative analytics framework adaptable to Stellar-specific oracle risk monitoring.
For this resubmission, we are adding Stellar-specific ecosystem validation. At submission time, we are engaging with Stellar/Soroban builders and protocols to validate integration needs around oracle risk, circuit breakers, thin-liquidity conditions, and SDEX/CEX divergence.
Completion date: June 5, 2026
Tranche 1 establishes the open-source foundation of Stellar Oracle Shield and proves that the core primitive works on Soroban testnet.
Public GitHub repository
Apache 2.0 license
CI/CD setup
contribution guide
issue tracker
initial documentation
Soroban circuit-breaker contract v0.1
deployed on Stellar testnet
core state machine
health status interface
timestamp and stale-data handling
event emission
basic admin controls
Integrator SDK v0.1
Rust crate
TypeScript bindings
sample calls for check_health, get_score, and event subscription
local integration example
SDEX ingestion alpha
Horizon API integration
Soroban RPC integration
live order book snapshots and trade events for at least 10 Stellar pairs
target data availability latency below 5 seconds from ledger close
Oracle Readiness Score alpha
first version of per-pair score computation
spread, depth, divergence, volatility, trade flow, and network-health components
real-time score updates pushed to testnet contract
Threat model and integration documentation
trust assumptions
failure modes
operator-key handling
stale-score behavior
“hello world” integration tutorial
Public repository available and buildable.
Contract deployed and callable on Stellar testnet.
SDK published in a usable 0.1 release.
At least 10 Stellar pairs monitored in the SDEX ingestion alpha.
Scores updated on testnet contract.
Documentation allows an external developer to run the sample integration.
Soroban circuit-breaker contract v0.1: $6,000
SDEX ingestion alpha: $7,000
ORS alpha adaptation: $4,000
SDK and reference example: $3,000
Threat model and documentation: $2,000
Repo setup, CI/CD, project management, reporting: $2,000
Total Tranche 1: $24,000
Completion date: July 31, 2026
Tranche 2 turns the testnet prototype into a usable beta product, expands monitored coverage, and prepares the decentralization layer required for mainnet.
Soroban contract v0.2 on testnet
circuit-breaker logic
configurable thresholds
degraded and unsafe states
emergency pause logic
expanded event logs
Exploit and stress simulation suite
thin-liquidity simulations
SDEX/CEX divergence scenarios
stale oracle scenarios
sudden volatility scenarios
network degradation scenarios
Public dashboard beta
live ORS display
pair-level detail page
historical score chart
circuit-breaker event log
on-chain contract state verification
API beta
REST endpoints for current scores and historical scores
WebSocket stream for real-time status updates
documentation and rate limits
Expanded SDEX and ORS coverage
at least 15 monitored Stellar pairs
improved score calibration using historical windows
score component breakdown published on dashboard
Multi-validator design and prototype
validator registry design
signed attestation format
target quorum model
testnet prototype for quorum-based updates
Integration guide v1
protocol integration checklist
code examples for common DeFi use cases
failure-mode handling recommendations
Dashboard beta publicly reachable.
At least 15 Stellar pairs monitored.
Contract v0.2 deployed and tested on testnet.
API beta documented and functional.
Simulation suite published with reproducible test cases.
Multi-validator design documented and prototype deployed on testnet.
Contract v0.2 and testnet circuit-breaker logic: $6,000
Exploit and stress simulation suite: $4,000
Dashboard beta: $8,000
API beta: $6,000
Expanded ingestion and ORS calibration: $6,000
Multi-validator design and testnet prototype: $3,000
Documentation, project management, reporting: $3,000
Total Tranche 2: $36,000
Completion date: September 11, 2026
Tranche 3 delivers the mainnet launch, the first production integration, and the decentralization improvements requested by SCF voters.
Mainnet deployment
Oracle Shield contract deployed on Stellar mainnet
documented deployment procedure
published contract address
monitoring and incident-response runbook
Multi-validator architecture on mainnet
at least 3 independent validators targeted at launch
2-of-3 quorum for score/state attestations
public validator registry
signed attestations
public disclosure of validator addresses
Governance and parameter management
timelocked governance for critical parameters
public parameter-change process
emergency pause controls
recovery procedure
Named-partner production integration
one named Stellar DeFi protocol integrated on mainnet
integration documented as a public case study
integration verifiable through contract address or transaction links
if not delivered by Tranche 3 close, the $9,000 integration line item is forfeited and refunded to the SCF treasury
Professional user testing
four paid 90-minute sessions with protocol engineers or Stellar builders
anonymized findings published
GitHub issues created from feedback
external integration and security usability review
Production dashboard and API
production dashboard live
production API live
99.5% uptime over a 2-week observation period
public monitoring of contract state and trip events
Final documentation and ecosystem enablement
final SDK documentation
video walkthrough
developer tutorial
integration checklist
recorded technical workshop
Contract live on Stellar mainnet.
Public dashboard and API live.
Multi-validator attestation model live with at least 3 validator addresses disclosed, or validator rollout status transparently documented.
One named protocol integration live, or the $9,000 line item refunded.
Professional user testing completed and published.
SDK and integration docs finalized.
Public runbook and incident response process published.
Mainnet deployment and monitoring setup: $5,000
Multi-validator architecture and mainnet implementation: $12,000
Governance, timelock, emergency pause, parameter management: $6,000
Named-partner production integration: $9,000
Professional user testing and external usability/security review: $6,400
Production dashboard and API hardening: $5,000
Documentation, tutorials, and recorded workshop: $2,600
Project management and reporting: $2,000
Total Tranche 3: $48,000
Sun Zu Lab, 6-person team, headquartered in Metz, France. Registered as a French SAS.
Vincent Madrenas: CEO & Co-Founder, École Polytechnique graduate. Background in fintech and quantitative trading on crypto assets.
Toussaint Behaghel: VP of Product & Late Founder, École des Ponts ParisTech graduate. Former CTO at TRYGR and Head of Data Science at SESAMm. E
Thierry Pedemonte: Senior Software Engineer, Rust 25+ years of experience in capital markets technology. Deep expertise in high-performance data pipelines and real-time analytics.
Mathieu Beucher: Senior Software Engineer, Rust Software Engineering. Specializes in Rust-based high-performance backend infrastructure for real-time market data collection and analytics.
Jeffrey Degrenne — Senior Full Stack Developer, ESIEA engineering graduate. Full-stack development expertise across web platforms and immersive applications. Responsible for dashboard UI/UX, API development, and client-facing product delivery at Sun Zu Lab.
Maxime Garcia: Senior Quantitative Analyst, École Polytechnique graduate. Leads quantitative research on market microstructure analytics
Vincent Madrenas
No other submissions.