Fusion+ Aptos/NEAR

A cross-chain swap extension for 1inch Fusion+ that enables bidirectional swaps between Ethereum and NEAR/Aptos chains using Hash Time-Locked Contracts (HTLC).

Features:

✅ Bidirectional swaps: ETH ↔ NEAR and ETH ↔ Aptos

✅ Hash Time-Locked Contracts (HTLC): With proper hashlock and timelock functionality

✅ 1inch Escrow Factory integration: On Ethereum side

✅ Custom escrow contracts: For NEAR and Aptos

✅ Cross-chain orchestration layer

✅ Mainnet and testnet support

        HTLC Flow
  ┌────────────────────┐
  │                    │

NEAR/Aptos <------------> Ethereum │ │ ▼ ▼ Escrow Factory Contract → 1inch Custom Escrow

🔧 Core Technologies 1inch Limit Order Protocol (LOP) – for atomic escrow on Ethereum (Base Sepolia)

Hash Time-Locked Contracts (HTLC) – for trustless locking on NEAR and Aptos

Cross-chain orchestration layer – JS orchestrator managing swap flow

⛓️ Blockchain Platforms Ethereum (Base Sepolia) – using 1inch for escrow and claiming

NEAR Protocol – custom HTLC smart contract (Rust)

Aptos – HTLC contract written in Move

🧠 Smart Contract Languages Solidity – Ethereum-side integration via 1inch

Rust – NEAR smart contracts

Move – Aptos smart contracts

🧰 Libraries & Tools ethers.js – Ethereum smart contract interaction

near-api-js – NEAR RPC and contract integration

aptos (TypeScript SDK) – Aptos account and contract handling

SHA-256 – cryptographic hash function for hashlocks