IOST

Building the

PayFi Bridge

[ 01 ]Layer-2

PayFi, a Layer-2 payment solution, aims to connect multiple blockchain ecosystems, enabling greater interoperability and value flow. It serves not only as an acceleration engine for the PayPIN payment chain but also as a payment hub connecting IOST 3.0 with other blockchains, offering users a seamless payment experience and fostering the continuous growth of the PayPIN economy.

BNB Chain-based Layer-2 Solution

PayFi uses Optimistic Rollup, inheriting BNB Chain's high performance and low fees, significantly boosting transaction speed and throughput. EVM compatibility eases developer migration, lowers barriers, and accelerates PayPIN app deployment.

Decentralized Sequencer Network

PayFi uses decentralized network to avoid central sequencer issues: single points, censorship, MEV monopolies; optimizes transactions with BFT, BLS, state channels, boosting efficiency, scalability, security, and decentralization; handles large-scale payments for faster, reliable experience.

Modular Design and Pluggable Components

PayFi's L2 architecture uses modular design, with core components like smart contract engine and consensus module being pluggable for custom configurations and upgrades. This design enhances system maintainability and scalability while providing space for future PayPIN application innovation.

Data Availability and Verification

PayFi uses a hybrid mechanism of on-chain data availability commitments and off-chain data validity proofs, ensuring data integrity and security. It also supports zk-Rollup zero-knowledge proof verification, enhancing data security and reducing the burden on BNB Chain.

[ 02 ]PayFi Nexus

High-Speed Payment Data for Layer-2

As a core module in IOST 3.0, PayFi Nexus, based on IOST L2, partners with Oracles like Seda and Stork to deliver high-quality, real-time payment data to the IOST chain, bridging traditional payments and DeFi.

Leveraging L2 scalability, PayFi Nexus supports rapid, low-cost transmission of diverse payment data such as exchange rates and payment volumes to the main chain.

[ 03 ]PayFi Accelerator

Driving On-Chain Liquidity for Real-World Assets

Real-World Asset (RWA) tokenization is a fast-growing DeFi sector, but faces challenges in compliance, liquidity, and data access. PayFi integrates an RWA module into its L2, offering users a compliant, secure, and efficient platform. This leverages PayFi's low cost, high performance, and cross-chain interoperability along with IOST 3.0's DID module and cross-chain bridging to empower RWAs. RWA functionality is integral to PayFi L2.

[ 04 ]PayFi Guardian

Protecting Payment Security

IOST 3.0 aims to build a robust, efficient, flexible PayPIN infrastructure, creating an open payment chain ecosystem. It comprehensively upgrades tech architecture: underlying security, subchain architecture, functional modules, developer tools; to meet diverse PayPIN needs, unleash Web3 payment potential, and drive widespread adoption.