NEXUS INTENT

The AI Cross-Chain Swap Assistant is an intelligent DeFi interface that lets users initiate cryptocurrency swaps across multiple blockchains using natural language input. Instead of interacting with complex UIs or manually configuring token and network details, users can simply type commands like:

“Swap 1 ETH to USDC on Arbitrum” or “Convert 0.1 BTC to ETH”

The system uses OpenAI GPT-4 to parse user input into structured transaction parameters such as:

Source and destination tokens

Blockchain networks

Amounts

Intent confidence

It then integrates with the 1inch Fusion+ API to fetch live quotes, build transactions, and simulate or execute swaps. The application supports both same-chain and cross-chain operations, and includes support for native and ERC-20 tokens across Ethereum, Arbitrum, Polygon, and even Bitcoin (simulated).

Key Components:

FastAPI backend: Handles requests, parsing, and 1inch integration.

AI parsing module: Uses GPT-4 to extract structured swap data from free-form text.

1inch service module: Interfaces with the 1inch Fusion+ API to quote and prepare transactions.

Wallet module: Supports transaction signing, balance checking, and mock execution.

Demo + hackathon scripts: Showcase full user flows, system health checks, and innovation highlights.

Supported Features:

Natural language DeFi swap interface

Cross-chain detection and routing

Gas and price impact estimation

1inch Fusion+ quote and swap integration

Modular wallet abstraction with mock support

End-to-end working demo and test harness

Why It Matters: Today’s DeFi tools are powerful but difficult for everyday users to access. This project makes DeFi radically more accessible by replacing dropdowns and arcane token symbols with a conversation, bridging the gap between user-friendly AI and deep protocol-level functionality.

Draft EIP = https://github.com/ethereum/EIPs/pull/10085

AI Swap – Natural Language to DeFi Execution User Input The user types something like: “Swap 10 ETH to USDC on Ethereum”

AI Parser (GPT-4) The message is sent to GPT-4 (via OpenAI API), which parses it into a structured JSON intent:

{ "from_chain": "ethereum", "to_chain": "arbitrum", "from_token": "ETH", "to_token": "USDC", "amount": "10" } Intent Validation The backend checks:

Are the tokens/chains supported?

Is the amount valid?

Are the tokens available on the selected chains?

Quote via 1inch Fusion+ API

A live quote is fetched from 1inch’s /quote endpoint.

Includes estimated output, gas costs, execution time.

Build Transaction

A transaction is built using /swap endpoint from 1inch.

Includes parameters like slippage, token addresses, amount in wei.

Wallet Execution (or Mock)

The transaction is signed and (optionally) broadcast using the SimpleWallet class.

For demo use, a mock hash is returned with a simulated explorer link.

Secure Intents – Cryptographic Swap Authorisation (Optional Mode) Intent Signing (User or AI Agent) The parsed JSON intent is:

Hashed

Signed using EIP-712 (or standard Ethereum signature)

Optionally encrypted for confidentiality (e.g., with X402 or similar)

SecureIntent Format A SecureIntent looks like:

{ "payload": "ENCRYPTED_SWAP_DETAILS", "ttl": 300, "signature": "0x...", "address": "0xUserWallet" } Verification on Backend

Signature is verified against address

ttl (time-to-live) prevents replay attacks

If encrypted, payload is decrypted

Trusted Execution Once verified:

The intent is treated as trusted and executed

Execution logs are linked back to signer’s address