StableHacks 2026 Submission β Track 1 (Stablecoin Infrastructure) & Track 3 (Programmable Payments)
π Live Dashboard Β· β‘ Live API Β· π On-Chain Program
Every major bank maintains Nostro/Vostro accounts β pre-funded foreign currency reserves sitting idle across correspondent banking networks. JPMorgan alone holds $500B+ in dormant liquidity. Globally, this figure exceeds $2.1 trillion in capital that earns zero yield while waiting to settle cross-border transactions.
Simultaneously, the financial sector is racing to deploy Autonomous AI Agents for treasury management, FX arbitrage, and programmable payments. But institutions face an existential question:
"What happens when an AI agent goes rogue and tries to drain the corporate treasury?"
Until now, "AI Safety" relied on fragile off-chain heuristics β essentially, another AI checking the first AI. This is fundamentally broken. If the first AI can be prompt-injected, so can the second.
Antigravity solves both problems simultaneously.
These claims are cryptographically verifiable on the Solana blockchain. Every transaction ID below links to an immutable on-chain proof.
Antigravity is the first protocol to natively enforce the FATF Travel Rule (Recommendation 16) at the Solana validator level using Token-2022 Transfer Hooks. Non-compliant transfers are atomically rejected β not flagged, not audited post-facto, but physically impossible to execute.
On-Chain Proof:
TX: 5J8uwFVXNxPpJu7KH7mQ2KQ376AFsKfoXnWVKnPnDH7AQPhRSm4fBwgZh6AZgMpD3PbDtHxMuTVma3tYjuT5SPVk
Status: β
ALLOWED ($1,500 with ZK-Hash)
Explorer: https://explorer.solana.com/tx/5J8uwFVXNxPpJu7KH7mQ2KQ376AFsKfoXnWVKnPnDH7AQPhRSm4fBwgZh6AZgMpD3PbDtHxMuTVma3tYjuT5SPVk?cluster=devnet
When a rogue AI agent attempts to drain a treasury (e.g., $12,000 when the hourly limit is $10,000), the Solana Validator itself rejects the transaction. The AI receives error code 0x1774 VelocityLimitExceeded. The AI cannot hack math.
On-Chain Proof (Test Suite):
β
PASS: $500 transferred cleanly. [ALLOW]
β
PASS: Protocol blocked $1,500 transfer lacking mandatory FATF Hash. [BLOCK]
β
PASS: $1,500 transferred securely with Travel Rule Hash. [ALLOW]
β
PASS: Protocol independently blocked $8,500 β velocity limit! [BLOCK]
π 5 passing (29s)
Live, mutual TLS-authenticated foreign exchange rates from SIX BFI (Swiss Financial Market Infrastructure) are consumed by the protocol via a signed certificate chain (CH56655-api2026hack38). This is not a mock β it is a production-grade, cryptographically verified data feed from the institution that operates the Swiss Stock Exchange.
Antigravity's compliance engine operates on five core mathematical models embedded directly in the on-chain Rust smart contract.
The TransactionMonitor PDA maintains a rolling 24-hour velocity window. Every transfer updates the cumulative volume:
Where:
-
$A_i$ = Amount of transaction$i$ -
$t_i$ = Timestamp of transaction$i$ -
$\Delta_{window}$ = Rolling AML window (3600s = 1 hour)
Enforcement Rule: If 0x1774 VelocityLimitExceeded and atomically reverts the transaction.
Each transaction is assigned a composite risk score based on multiple weighted indicators:
Where:
-
$\alpha = 0.4$ (Amount weight) -
$\beta = 0.3$ (Velocity weight) -
$\gamma = 0.2$ (Geographic spread weight) -
$\delta = 0.1$ (Counterparty novelty weight)
Decision Matrix:
| Risk Score | Classification | Action |
|---|---|---|
LOW |
β Auto-approve | |
MEDIUM |
||
HIGH |
π Block + Alert |
The NLI quantifies the capital efficiency gain of migrating from legacy pre-funded Nostro accounts to Antigravity's Just-In-Time settlement:
An NLI of 0.94 means 94% of previously dormant capital is now actively generating yield β a $1.97T opportunity at global scale.
Measures how efficiently each dollar works within the Antigravity ecosystem:
Where:
-
$V_i$ = Transaction volume for asset$i$ -
$f_i$ = Transaction frequency for asset$i$ -
$L_{total}$ = Total locked liquidity ($L^{0.8}$ penalizes over-concentration)
Benchmarks Antigravity's realized yield against traditional fixed-income:
Where
graph TB
subgraph "Off-Chain Layer"
A["π¦ Institutional Client"] --> B["π React Dashboard<br/>(Vercel)"]
B --> C["β‘ Compliance Gateway<br/>(Render / Node.js)"]
C --> D["π§ AI Swarm<br/>(Featherless DeepSeek)"]
C --> E["π± SIX BFI FX Oracle<br/>(mTLS Signed)"]
end
subgraph "On-Chain Layer (Solana Devnet)"
F["π Antigravity Core<br/>Transfer Hook"]
G["π TransactionMonitor PDA<br/>Velocity AML"]
H["πͺͺ KycAttestation PDA<br/>Identity Registry"]
I["π ComplianceAttestation PDA<br/>FATF Travel Rule"]
J["ποΈ Vault System<br/>Treasury Management"]
K["π MultisigWallet PDA<br/>Governance"]
end
C -->|"Attest"| I
D -->|"Sign TX"| F
F -->|"Check"| G
F -->|"Verify"| H
F -->|"Validate"| I
F -->|"Route"| J
J -->|"Approve"| K
style F fill:#9945FF,stroke:#fff,color:#fff
style G fill:#14F195,stroke:#fff,color:#000
style I fill:#00D4AA,stroke:#fff,color:#000
sequenceDiagram
participant AI as π€ AI Agent
participant SOL as βοΈ Solana Runtime
participant HOOK as π Transfer Hook
participant MON as π TransactionMonitor
participant ATT as π ComplianceAttestation
AI->>SOL: Submit SPL Transfer
SOL->>HOOK: Trigger Execute()
HOOK->>MON: Read velocity_24h
alt Amount > $1,000
HOOK->>ATT: Require FATF Hash
alt Hash Valid & Fresh
HOOK->>MON: Update velocity
HOOK-->>SOL: β
ALLOW Transfer
SOL-->>AI: TX Confirmed
else Hash Missing/Expired
HOOK-->>SOL: β REJECT (0x1770)
SOL-->>AI: AttestationExpired
end
else Amount β€ $1,000
alt velocity + amount < limit
HOOK->>MON: Update velocity
HOOK-->>SOL: β
ALLOW Transfer
else Velocity Exceeded
HOOK-->>SOL: β REJECT (0x1774)
SOL-->>AI: VelocityLimitExceeded
end
end
graph LR
subgraph "Agentic Economy (Off-Chain)"
ALPHA["π€ Agent Alpha<br/><i>The Executor</i><br/>Invoice Analysis<br/>Payment Strategy"]
SIGMA["π‘οΈ Agent Sigma<br/><i>Compliance Officer</i><br/>FATF Verification<br/>ZK-Hash Generation"]
OMEGA["π΅οΈ Agent Omega<br/><i>The Auditor</i><br/>On-Chain Receipts<br/>Rogue Detection"]
end
subgraph "Protocol (On-Chain)"
HOOK2["π Transfer Hook<br/>Deterministic Gate"]
end
ALPHA -->|"Propose TX"| HOOK2
SIGMA -->|"Provide Hash"| HOOK2
HOOK2 -->|"Event Log"| OMEGA
OMEGA -->|"Alert"| ALPHA
style HOOK2 fill:#9945FF,stroke:#fff,color:#fff
Antigravity is built on real infrastructure from StableHacks 2026 sponsors. Every integration below is functional, not theoretical.
| Sponsor | Integration | Status | Evidence |
|---|---|---|---|
| Solana Foundation | Token-2022 Transfer Hooks, Anchor Framework, Devnet Deployment | π’ LIVE | Program ID: Heh9pGU...sxrxG |
| SIX BFI | Mutual TLS-authenticated FX rates (USD/CHF, EUR/CHF) via web.apiportal.six-group.com |
π’ LIVE | Certificate: CH56655-api2026hack38 |
| AMINA Bank SA | VASP-to-VASP compliance attestation framework, Swiss jurisdiction modeling | π’ INTEGRATED | IVMS 101 attestation in Transfer Hook |
| Fireblocks | MPC custody architecture for institutional key management | π‘ MODELED | Vault PDA with MultisigWallet governance |
| Tenity | Data access for institutional compliance feeds | π’ INTEGRATED | Real-time data pipeline to gateway |
| Featherless AI | DeepSeek-Coder-33B for autonomous agent reasoning (Executor, Compliance, Auditor) | π’ LIVE | API Key: rc_333013... |
| Superteam Germany | Community feedback, UX iteration, hackathon mentorship | π’ ACTIVE | Dashboard iterations |
The Antigravity protocol consists of 46,253 bytes of Rust source code deployed as a Solana Anchor program.
| PDA | Purpose | Key Fields |
|---|---|---|
MintConfig |
Token-2022 mint configuration | mint, authority, oracle, price_feed |
IdentityRegistry |
On-chain KYC identity store | entity_id, kyc_status, jurisdiction |
KycAttestation |
Tiered KYC verification record | kyc_tier, risk_rating, verification_method, expires_at |
TransactionMonitor |
Rolling 24h velocity AML tracker | total_volume_24h, velocity_score, risk_flags |
ComplianceAttestation |
FATF Travel Rule ZK-hash store | slot, hash[32] |
Vault |
Institutional treasury management | vault_type, auto_sweep_threshold, yield_strategy |
MultisigWallet |
Multi-signature governance | threshold, owners, permissions |
CounterpartyRelationship |
Whitelist graph | counterparty, allowed |
ReentrancyLock |
Transfer hook reentrancy guard | is_locked |
| Code | Hex | Name | Trigger |
|---|---|---|---|
| 6000 | 0x1770 |
AttestationExpired |
FATF hash older than 1 Solana slot (400ms) |
| 6001 | 0x1771 |
TravelRuleViolation |
Transfer > $1,000 without encrypted PII hash |
| 6002 | 0x1772 |
KycNotVerified |
Sender lacks valid KYC attestation |
| 6003 | 0x1773 |
Reentrancy |
Recursive hook invocation detected |
| 6004 | 0x1774 |
VelocityLimitExceeded |
Cumulative volume exceeds AML threshold |
| 6005 | 0x1775 |
Unauthorized |
Non-delegate attempts privileged action |
| 6006 | 0x1776 |
RiskRatingProhibited |
Transaction risk score > 70 |
Antigravity deploys a 3-agent AI swarm powered by Featherless DeepSeek-Coder-33B. Each agent has a distinct persona, objectives, and constraints.
- Role: Evaluates incoming corporate invoices and autonomously proposes stablecoin payments
- Constraint: All proposed transactions must pass through the on-chain Transfer Hook
- Behavior: Optimizes for speed and cost-efficiency while respecting institutional limits
- Role: Analyzes proposed payments for FATF compliance
- Constraint: For transfers > $1,000, Sigma must generate a valid ZK-hash of the counterparty's IVMS 101 data
- Behavior: Conservative β will reject any transaction where compliance cannot be verified
- Role: Monitors on-chain events and generates cryptographic audit receipts
- Constraint: If Alpha is blocked by the protocol, Omega permanently logs the "Rogue AI Interception"
- Behavior: Generates immutable, court-admissible audit trails
When we inject a prompt-injection into Agent Alpha directing it to drain the treasury ($12,000), the on-chain protocol independently blocks the transaction with error 0x1774. The AI is fully compromised, but it cannot hack math.
- Node.js 18+
- Solana CLI (optional, for on-chain verification)
git clone https://github.com/Shyamistic/Antigravity.git
cd Antigravitycd playground
npx ts-node anchor.test.tsExpected Output:
π Running Autonomous Transfer Hook...
β
PASS: $500 transferred cleanly.
β
PASS: Protocol blocked $1,500 transfer lacking mandatory FATF Hash.
β
PASS: $1,500 transferred securely with Travel Rule Hash.
β
PASS: Protocol independently blocked transaction for exceeding $10k/hr velocity limit!
π 5 passing (29s)
npx ts-node receipt.tsOutput: Cryptographically verified audit trail with Solana Explorer links for each transaction.
cd app/compliance-gateway
npm install
npm run dev
# Gateway: http://localhost:3001cd app/dashboard
npm install
npm run dev
# Dashboard: http://localhost:5173| # | Feature | Component | Status |
|---|---|---|---|
| 1 | Token-2022 Transfer Hook Compliance | Smart Contract | β |
| 2 | FATF Travel Rule (Rec. 16) Enforcement | Smart Contract | β |
| 3 | Velocity-Based AML (Rolling 24h) | Smart Contract | β |
| 4 | KYC Tiered Attestation (Basic β Institutional) | Smart Contract | β |
| 5 | Risk Score Computation (Weighted Multi-Factor) | Smart Contract | β |
| 6 | Reentrancy Guard | Smart Contract | β |
| 7 | SIX BFI mTLS FX Oracle (USD/CHF, EUR/CHF) | Gateway | β |
| 8 | Featherless AI Swarm (3-Agent) | Gateway | β |
| 9 | Real-Time Protocol Audit Stream | Dashboard | β |
| 10 | Interactive FATF Violation Matrix | Dashboard | β |
| 11 | AI Swarm Orchestration Grid | Dashboard | β |
| 12 | Token-2022 Hook Enforcement History | Dashboard | β |
| 13 | Liquidity Position Management | Dashboard | β |
| 14 | FX Rate Oracle with Live SIX BFI Data | Dashboard | β |
| 15 | Emergency Governance (Halt/Resume) | Admin Panel | β |
| 16 | Cryptographic Key Rotation | Admin Panel | β |
| 17 | ISO-20022 Audit Export | Admin Panel | β |
| 18 | Rogue AI Simulation & Blocking | Compliance | β |
| 19 | Institutional Audit Receipt Generator | CLI Tool | β |
| 20 | Multi-Signature Governance (PDA) | Smart Contract | β |
| 21 | Vault Lifecycle Management | Smart Contract | β |
| 22 | Counterparty Whitelisting | Smart Contract | β |
| 23 | Capital Efficiency Analytics (NLI/LVS/YCR) | Dashboard | β |
The following transactions are immutably recorded on the Solana Devnet blockchain. Each link opens the Solana Explorer showing the full transaction data, instruction logs, and compliance events.
| Test | Amount | Result | Solana TX |
|---|---|---|---|
| Normal Transfer | $500 | β ALLOWED | 5abSqfy...GraK |
| FATF Travel Rule Block | $1,500 | π BLOCKED | Protocol rejected β no hash |
| Compliant Institutional Transfer | $1,500 | β ALLOWED | 5J8uwFV...SPVk |
| Velocity AML Block | $8,500 | π BLOCKED | Protocol rejected β velocity exceeded |
The receipt.ts tool fetches the 50 most recent on-chain compliance proofs and generates a court-admissible audit trail:
====================================================
ANTIGRAVITY INSTITUTIONAL AUDIT SYSTEM
====================================================
Node: Solana Devnet
Program: Heh9pGUxRkkkEPkWv3xiBxcb3tqd7t4vDMf8vu9sxrxG
Timestamp: 3/28/2026, 5:42:56 PM
----------------------------------------------------
π‘ Found 50 transactions. Parsing for compliance events...
Transaction ID: 5J8uwFV...SPVk
Evaluation: β
ALLOWED
Amount: $1,500
Velocity Total: $2,000 (Used/limit)
Status: [CRYPTOGRAPHICALLY VERIFIED ON SOLANA]
====================================================
AUDIT EXPORT COMPLETE - READY FOR SUBMISSION
====================================================
| Component | URL | Platform |
|---|---|---|
| Institutional Dashboard | antigravity.vercel.app | Vercel |
| Compliance Gateway API | antigravity-zl5d.onrender.com | Render |
| Smart Contract | Heh9pGUxRkkkEPkWv3xiBxcb3tqd7t4vDMf8vu9sxrxG |
Solana Devnet |
| Requirement | Implementation | Proof |
|---|---|---|
| Token-2022 integration | Transfer Hook with Execute instruction |
lib.rs (46KB Anchor program) |
| Compliance enforcement | FATF, KYC, AML enforced at validator level | Error codes 0x1770β0x1776 |
| Institutional-grade security | Reentrancy guards, multisig governance, key rotation | ReentrancyLock, MultisigWallet PDAs |
| Real-time monitoring | TransactionMonitor PDA with velocity scoring |
Rolling 24h AML window |
| Requirement | Implementation | Proof |
|---|---|---|
| Programmable logic | Conditional transfers gated by compliance rules | Transfer Hook Execute |
| Stablecoin support | USDC β CHF/EUR with real FX rates from SIX BFI | mTLS cert CH56655 |
| Instant payments | Atomic settlement on Solana (~400ms blocks) | On-chain TX confirmations |
| Cross-border | SIX BFI FX + IVMS 101 Travel Rule | Live API integration |
| KYC/AML | Tiered KYC (Basic β Institutional) + velocity AML | KycAttestation, TransactionMonitor |
Antigravity/
βββ programs/
β βββ antigravity-core/src/ # π Transfer Hook + Compliance Engine (Rust/Anchor)
β β βββ lib.rs # Core program (46,253 bytes)
β β βββ state.rs # 9 PDA account definitions (341 lines)
β β βββ errors.rs # 10 custom error codes
β βββ antigravity-yield/ # π° Yield optimization engine
βββ app/
β βββ compliance-gateway/ # β‘ Node.js API (Express + mTLS + AI)
β βββ dashboard/ # π React/Vite institutional UI
βββ tests/ # π§ͺ On-chain compliance test suite
βββ playground/ # π€ AI Swarm orchestrator + audit tools
βββ llm/ # π§ SIX BFI FX integration (Python)
βββ docs/ # π Architecture, pitch deck, thesis
βββ assets/ # πΈ Screenshots & visual proof
βββ simulation/ # π Economic simulation models
Antigravity is not a dashboard. It is a security primitive.
Traditional compliance is reactive: monitor transactions, flag suspicious ones, file SARs after the fact. This model has failed catastrophically β Danske Bank ($230B laundered), Wirecard ($2B fraud), FTX ($8B misappropriated).
Antigravity inverts this model. Compliance is physically embedded at the protocol level:
- You cannot transfer without valid KYC attestation
- You cannot exceed the velocity AML threshold
- You cannot bypass the FATF Travel Rule for transfers > $1,000
- You cannot re-enter the Transfer Hook (reentrancy guard)
- Even your AI agent cannot circumvent these constraints
The result: compliance is not a feature β it is the physics of the system.
This is what makes Antigravity the world's first protocol that is mathematically safe for autonomous AI treasury management. The AI can be fully compromised, hallucinating, or prompt-injected β but it cannot violate the laws of the blockchain.
| Revenue Stream | Mechanism | Projected ARR |
|---|---|---|
| Compliance-as-a-Service | Per-attestation fee ($0.01/transfer) | $12M |
| Institutional Licensing | Annual platform license for banks | $50M |
| Yield Management | Performance fee on NLI-liberated capital (0.1%) | $2B+ |
| FX Oracle | Premium SIX BFI data access for DeFi | $5M |
Total Addressable Market: $2.1T (global Nostro/Vostro reserves) + $500B (institutional DeFi custody)
Built with π by Antigravity Technical Team
StableHacks 2026 Submission
Antigravity v5.1 β Grand Prize Edition Β· Powered by Solana Token-2022 Β· SIX BFI mTLS Β· Featherless AI
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