Nexus Gateway: Bridging Legal Contracts & Smart Contracts

Smart contract code and off-chain legal contracts are often disconnected. A legal document might state "only the project owner can mint tokens," but if the Solidity code misses an onlyOwner modifier, a breach occurs with zero programmatic enforcement.

Nexus Gateway solves this by using a Digital Twin v3.1 parser that maps legal clauses directly to Solidity function signatures, visibility, modifiers, and breach conditions.

Key Features

1. Free Solidity Security Checker (Dry-Run)

   • Simulates 7 breach scenarios (BS-001 to BS-007) without registration or API keys.
   • Evaluates deployability, risk levels (Low, Medium, Critical), and actionable recommendations.

2. Machine-to-Machine (M2M) API Billing

   • Built on Polygon PoS using EIP-712 pull-payment permits.
   • No manual subscription management; clients sign off-chain permits, and the gateway executes micro-transactions in USDC.

3. Legal-Code Mapping

   • Generates bilingual (English/Indonesian) legal contracts side-by-side with compiled Solidity modules (ERC-20, ERC-721, Escrow).

Try the Security Checker Right Now

You can test the dry-run endpoint directly from your terminal using curl:

curl -X POST https://xibzsthfrbomefnvbicb.supabase.co/functions/v1/hello-world/gateway/dry-run \
  -H "Content-Type: application/json" \
  -d '{"source_code": "pragma solidity ^0.8.20; contract Token { function mint(address to, uint256 amount) public {} }"}'

Or use the interactive playground (no terminal needed): https://rakhmadaa-gif.github.io/nexus-core-gateway/

SDK

TypeScript: npm install nexus-gateway-sdk (136 downloads)
Python: pip install nexus-gateway-sdk (498 downloads)

Both SDKs ship with native tool wrappers for AI agent frameworks (LangChain, CrewAI, Vercel AI SDK).

Production Verified: 17/17 Checks PASS

• ✅ All 7 gateway endpoints live
• ✅ ERC-8004 on-chain identity (Agent #636, Polygon Mainnet)
• ✅ EIP-712 USDC pull payment contract deployed
• ✅ npm + PyPI packages live
• ✅ OpenAPI 3.0.3 spec with M2M x-extensions
• ✅ A2A discovery manifest (.well-known/agent.json)

Links

• GitHub: rakhmadaa-gif/nexus-core-gateway
• npm: nexus-gateway-sdk
• PyPI: nexus-gateway-sdk
• Playground: Try it in your browser
• Manifest (A2A): Agent discovery