{"slug": "typescript-sdk-for-autonomous-solidity-security-auditing-7-breach-scenarios-js", "title": "TypeScript SDK for autonomous Solidity security auditing — 7 breach scenarios, LangChain.js + Vercel AI SDK integration", "summary": "A developer released nexus-gateway-sdk, a TypeScript SDK for autonomous Solidity security auditing that runs seven breach simulations in about two milliseconds. The SDK integrates with LangChain.js and Vercel AI SDK, enabling AI agents to audit smart contracts programmatically without an API key for the free tier.", "body_md": "I've been working on an autonomous security auditing gateway for Solidity smart contracts. The TypeScript SDK just went live on npm — it runs 7 automated breach simulations against any Solidity source code in ~2ms, with no signup or API key required for the free tier.\n\nMost Solidity security tools are either:\n\nThis SDK gives you a **programmatic, agent-native** audit that runs 7 breach scenarios via a single function call. No local toolchain. No signup. No API key for the free tier.\n\n```\nnpm install nexus-gateway-sdk\n```\n\n| ID | Scenario | Question | \n|---|---|---|\n| BS-001 | Unauthorized Minting | Can tokens be minted without authorization? | \n| BS-002 | Transfer Violation | Can transfers bypass balance/allowance checks? | \n| BS-003 | Fund Drain | Can funds be withdrawn without authorization? | \n| BS-004 | Emergency Freeze | Is there an emergency stop / pause mechanism? | \n| BS-005 | Ownership Renounce | Can ownership renunciation lock admin functions? | \n| BS-006 | Reentrancy Attack | Are external calls protected against reentrancy? | \n| BS-007 | Replay Attack | Is nonce-based replay protection implemented? | \n\nEach scenario returns a structured result: `risk_level`, `affected_functions`, `detected`, `mitigation`.\n\n``` js\nimport { NexusClient } from \"nexus-gateway-sdk\";\n\nconst client = new NexusClient({ clientId: \"my-app\" });\n\nconst result = await client.dryRun({\n  source_code: contractSource\n});\n\n// result.breach_simulation.overall_risk → \"high\" | \"medium\" | \"low\" | \"critical\"\n// result.deployable → true | false\n// result.breach_simulation.scenarios → array of 7 scenario objects\n// result.digital_twin_v3_matrix → clause-to-code mapping\n// result.urgency_signal → time-decay warning for M2M orchestrators\n```\n\nThe SDK ships with native tool wrappers for AI agent frameworks:\n\n``` js\n// LangChain.js\nimport { createNexusTools } from \"nexus-gateway-sdk\";\nconst tools = createNexusTools({ clientId: \"my-agent\" });\n// → Returns Tool[] compatible with LangChain.js agent executor\n\n// Vercel AI SDK\nimport { createNexusVercelTools } from \"nexus-gateway-sdk\";\nconst tools = createNexusVercelTools({ clientId: \"my-agent\" });\n// → Returns tools compatible with Vercel AI SDK generateText\n```\n\nThis means any LangChain.js or Vercel AI agent can autonomously audit Solidity contracts as part of its toolset — no custom integration needed.\n\nBeyond the 7 breach scenarios, the audit produces a **Digital Twin matrix** — a clause-to-code mapping that links contract functions to their breach conditions:\n\n```\n// Each function in the contract gets mapped:\n{\n  function_signature: \"withdraw()\",\n  visibility: \"external\",\n  modifiers: [],\n  breach_conditions: [\"BS-006: reentrancy via external call before state update\"]\n}\n```\n\nThis is designed for M2M orchestration — agents can programmatically assess which functions are safe to call and which require additional guards.\n\nThe gateway passed **17/17 self-validation checks**:\n\n**Interactive playground:** [https://rakhmadaa-gif.github.io/nexus-core-gateway/](https://rakhmadaa-gif.github.io/nexus-core-gateway/)\n\nPaste any Solidity code → click \"Run Security Audit\" → instant results with 7 breach scenarios, risk badges, and recommendations.\n\nOr via curl:\n\n```\ncurl -X POST https://xibzsthfrbomefnvbicb.supabase.co/functions/v1/hello-world/gateway/dry-run \\\n  -H 'Content-Type: application/json' \\\n  -d '{\"source_code\": \"pragma solidity ^0.8.20; contract Token { }\"}'\n```\n\n`nexus-gateway-sdk@1.0.0` — 136 downloads\n*This is part of the Nexus Gateway — an autonomous M2M legal-code gateway for Web3 compliance. ERC-8004 Agent #636 on Polygon Mainnet. The free tier (dry-run audit) is intentionally open for community use.*", "url": "https://wpnews.pro/news/typescript-sdk-for-autonomous-solidity-security-auditing-7-breach-scenarios-js", "canonical_source": "https://dev.to/rakhmad_auladalie_59d4de/typescript-sdk-for-autonomous-solidity-security-auditing-7-breach-scenarios-langchainjs--3bbp", "published_at": "2026-09-07 08:40:28+00:00", "updated_at": "2026-09-07 08:57:26.267467+00:00", "lang": "en", "topics": ["developer-tools", "ai-agents", "ai-tools"], "entities": ["nexus-gateway-sdk", "LangChain.js", "Vercel AI SDK", "Solidity", "Nexus Gateway", "ERC-8004 Agent #636", "Polygon Mainnet"], "alternates": {"html": "https://wpnews.pro/news/typescript-sdk-for-autonomous-solidity-security-auditing-7-breach-scenarios-js", "markdown": "https://wpnews.pro/news/typescript-sdk-for-autonomous-solidity-security-auditing-7-breach-scenarios-js.md", "text": "https://wpnews.pro/news/typescript-sdk-for-autonomous-solidity-security-auditing-7-breach-scenarios-js.txt", "jsonld": "https://wpnews.pro/news/typescript-sdk-for-autonomous-solidity-security-auditing-7-breach-scenarios-js.jsonld"}}