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Design

Subswap Documentation​

Topic: Design of Subswap Cross-Chain Transfer System on XDC Zero

Overview​

Subswap is cross-chain application built on XDC Zero to provide seamless cross-chain transfer capabilities. It is structured in a multi-layered architecture, with each layer handling distinct functions to ensure smooth, secure, and efficient transactions across blockchain networks. This document provides a design overview of each layer, illustrating the components and their roles within the Subswap system.

System Architecture​

Subswap is organized into three layers:

  1. Layer 0 - XDC Zero (Core Infrastructure)

    • Relayer: Manages the transfer of data and assets between blockchains by relaying transaction information across chains.
    • Oracle: Provides reliable and up-to-date data for cross-chain operations, ensuring that the transfer protocols operate with accurate information.
    • Endpoint: Serves as the core communication channel within XDC Zero, connecting the layers and ensuring transactions flow smoothly.
    • Front-End Management: Handles the user interface and manages interactions with the underlying protocols, offering a streamlined experience for users initiating cross-chain transfers.

  2. Layer 1 - Treasury

    • Cross-Chain Transfer Frontend: User-facing interface for initiating and tracking cross-chain transactions. This frontend simplifies the user experience, making it easier for users to start transfers between different blockchains.
    • Mint/Burn Contract: Manages asset issuance and burning on different chains. This contract mints new assets on the target chain while burning them on the source chain, maintaining asset consistency across networks.
    • Lock/Unlock Contract: Locks assets on the source chain and unlocks them on the target chain, ensuring that the asset's total supply remains consistent and secure across chains.

  3. Layer 2 - Swap Protocol

    • Swap Frontend: Provides a user-friendly interface for initiating swaps between different assets on the Subswap platform.
    • Swap Contract: Executes the swap logic, managing the conversion of assets based on the predefined terms and rates, ensuring that users receive the correct assets after a swap.

Design Considerations​

  • Security: The use of locking and minting mechanisms prevents double-spending and ensures the security of cross-chain assets.
  • User Experience: Frontends are designed to be intuitive, making it easy for users to interact with complex cross-chain protocols.
  • Reliability: Oracles and relayers provide real-time data and reliable transaction relay, reducing the chance of errors in cross-chain transfers.

Conclusion​

Subswap leverages XDC Zero's powerful infrastructure to deliver an efficient cross-chain transfer service. By layering its architecture, Subswap can maintain security, scalability, and ease of use, meeting the needs of users looking for seamless asset transfers across multiple blockchain networks.

Construction(if you want to make a cross chain transfer)​

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