FWeb3: A Practical Incentive-Aware Federated Learning Framework

TL;DR

FWeb3 introduces a modular, incentive-aware federated learning framework leveraging Web3 technologies, enhancing system efficiency, security, and usability in open collaborative environments.

Contribution

It presents a practical, Web3-enabled FL framework with a modular architecture, supporting pluggable methods and a user-friendly browser-based interface.

Findings

Supports end-to-end incentive-aware FL with minimal overheads.

Deploys from zero configuration in under 3 minutes.

Enables quick user onboarding in under 1 minute.

Abstract

Federated learning (FL) enables collaborative model training over distributed private data. However, sustaining open participation requires incentive mechanisms that compensate contributors for their resources and risks. Enabled by Web3 primitives, especially blockchains, recent FL proposals incorporate incentive mechanisms for open participation, yet most focus primarily on algorithmic design and overlook system-level challenges, including coordination efficiency, secure handling of model updates, and practical usability. We present FWeb3, a practical Web3-enabled FL framework for incentive-aware training in open environments. FWeb3 adopts a modular architecture that separates FL functions from Web3 support services, decoupling the off-chain training and data plane from on-chain settlement while preserving verifiable incentive execution. The framework supports pluggable aggregation and contribution evaluation methods and provides a browser-native DApp interface to lower the participation barrier. We evaluate FWeb3 in real-world settings and show that it supports end-to-end incentive-aware FL with transaction and data-transfer overheads of only 21.3% and 3.4% in WAN; FWeb3 also deploys from zero configuration in under 3 minutes and enables user onboarding in under 1 minute.