PoolFi Litepaper

1. Executive Summary

2. The Problem

3. Why Traditional ROSCA Systems Matter

ROSCA systems have existed for centuries across cultures worldwide. These informal savings groups serve millions of people who lack access to traditional banking or prefer community-based financial coordination. The systems are known by many names:

These systems coordinate billions of dollars annually, demonstrating the massive demand for community savings coordination. However, they remain largely offline and dependent on trust.

4. Why ROSCA Does Not Scale

• 1Physical coordination limits pool sizes and geographic reach
• 2Cash handling creates security risks and friction
• 3No default protection beyond social pressure
• 4Limited reputation portability across groups
• 5Organizer burden for tracking and enforcement
• 6No transparency for external observers

5. Introducing PoolFi Protocol

PoolFi brings ROSCA systems on-chain, preserving the social benefits while eliminating the trust requirements and operational friction. The protocol provides:

6. How PoolFi Works

7. Supported Assets

8. Pool Types

9. Collateral Protection Model

PoolFi requires participants to lock collateral as a risk-reduction mechanism. Collateral reduces the likelihood of loss in the event of a default, but it does not eliminate default risk entirely. If a defaulting member has already received their payout and their collateral is insufficient to cover outstanding obligations, remaining members may absorb a partial shortfall. The collateral model is designed to:

• Align participant incentives with pool success
• Partially compensate the pool in case of defaults
• Scale with contribution amounts and pool risk profiles
• Be returned upon successful pool completion

10. Default Handling

In the event of a missed contribution, the protocol has a structured default handling process:

11. Reputation System

PoolFi MVP tracks reputation off-chain while maintaining transparency through auditable pool activity records. Future protocol phases may commit reputation snapshots or reputation proofs on-chain, but reputation should be treated as off-chain during MVP:

12. Deterministic Queue Assignment

PoolFi uses deterministic queue assignment to ensure fairness, transparency, and predictability. Queue position is based primarily on join order, with bounded reputation-based adjustments:

• • Join order is the foundation: Earlier joiners receive earlier base positions
• • Reputation adjustment: Higher reputation may improve position by up to 3 slots maximum
• • Early participation bonus: First 10% of joiners receive modest priority boost
• • Fixed final queue: Once assigned, queue order remains unchanged for pool lifecycle

13. Fee Structure Overview

PoolFi implements a 5% fee on payouts that aligns incentives across all participants in the ecosystem. This fee structure mirrors how successful ROSCAs operate in the real world—where community leaders and introducers play essential roles in maintaining healthy pools.

Unlike purely collateral-based systems, this fee structure creates social accountability by rewarding the human relationships and community leadership that make ROSCAs successful.

14. Protocol Development Fund

1% of each payout is allocated to protocol development. This fund supports:

• • Ongoing protocol development and feature enhancements
• • Security audits and code reviews
• • Infrastructure costs and maintenance
• • Developer grants and bug bounties
• • Documentation and community resources

14b. Treasury vs Security Reserve

PoolFi maintains two distinct funds with separate responsibilities:

15. Security Reserve

The Security Reserve is a proposed protocol-wide protection fund designed to absorb unexpected protocol-level losses and edge cases. A portion of the 5% protocol fee may be allocated to this reserve, pending final reserve policy approval (Issue #40). The Security Reserve is maintained separately from the Protocol Treasury. This reserve:

• • Provides an additional layer of protection beyond individual collateral at the protocol level
• • Covers smart contract vulnerabilities and protocol-level edge cases
• • Ensures ecosystem resilience during market stress
• • Can be used for emergency interventions at protocol discretion

16. The Introducer Role

The Introducer is a key trust layer in the PoolFi ecosystem. In the MVP phase, all pools are private and invite-only—only participants introduced by a trusted member may join. This replicates how traditional ROSCAs work in practice: most people join because someone they personally trust invited them. Introducers receive 1% of payouts from participants they bring into the protocol.

Why This Matters: Introducers have a financial incentive to bring in trustworthy participants rather than simply maximizing signups. This creates a network of accountability where people are introduced by friends, family members, colleagues, or community leaders who vouch for their reliability.

The Introducer model transforms PoolFi from a purely technical solution into a reputation-driven community finance network that scales through trusted relationships.

17. The Pool Creator Role

The Pool Creator (or Pool Leader) receives 1% of payouts from the pools they create. This role is essential for maintaining healthy pools and ensuring participant success.

Aligned Incentives: Because Pool Creators earn from successful pool completions, they are incentivized to:

• • Recruit reliable participants who will complete the full cycle
• • Set realistic contribution amounts that participants can sustain
• • Provide ongoing support to reduce default rates
• • Build a reputation as a trusted community leader

This mirrors traditional ROSCA organizers who take responsibility for bringing the group together and ensuring its success. The Pool Creator fee rewards this essential human coordination work.

18. Why Solana

PoolFi is built on Solana for several key reasons:

19. Market Opportunity

Millions of people worldwide participate in informal savings groups known by different names such as kutu, arisan, susu, hui, tanda, and ROSCA. These systems coordinate billions of dollars annually but remain largely offline and trust-based.

PoolFi addresses this massive market by bringing these coordination mechanisms on-chain, adding transparency, security, and global accessibility while preserving the community dynamics that make these systems effective.

20. Roadmap

20b. Risk Disclosures

21. Long-Term Vision

PoolFi aims to become the standard infrastructure for decentralized savings coordination, enabling communities worldwide to access transparent, secure, and efficient savings pools. We envision a future where:

• • Community savings are coordinated transparently on-chain
• • Portable reputation unlocks financial opportunities across protocols
• • Global communities can save together regardless of geography
• • Transparent, auditable coordination replaces informal cash-based systems

22. Disclaimer