Sanca
Sanca is a decentralized platform that brings traditional ROSCA (Rotating Savings and Credit Association) to Web3.
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描述
Overview
Sanca is a decentralized platform that brings traditional ROSCA (Rotating Savings and Credit Association) to Web3, enabling communities to save together, earn yield, and access credit in a transparent, trustless manner. Built on Mantle Network with integration to Ondo Finance for institutional-grade yield generation.
What is ROSCA?
ROSCA (Rotating Savings and Credit Association) is a traditional community savings model where:
Members contribute regular amounts to a shared pool
Each member takes turns receiving the entire pool
The cycle continues until all members have received their payout
It's a proven system for financial inclusion and community wealth building
Problem Statement
Traditional ROSCAs face significant challenges:
Lack of Transparency - No public record of transactions
Manual Management - Requires trusted coordinators
Trust Required - Members must trust each other and coordinators
No Yield Generation - Funds sit idle without earning interest
Risk of Default - No automated enforcement mechanisms
Our Solution
Sanca solves these problems by leveraging blockchain technology:
Blockchain Transparency - All transactions recorded on-chain, publicly verifiable
Smart Contract Automation - Automated execution, no manual intervention needed
Trustless Execution - Code enforces rules, no need to trust individuals
Yield via Ondo Finance - Funds earn institutional-grade yield automatically
Collateral Protection - Auto-liquidation if members fail to contribute
Key Features
Transparent Pools
All pool activities, contributions, and payouts are recorded on-chain. Members can verify every transaction at any time.Automated Cycles
Smart contracts handle the entire pool lifecycle automatically - from member joining to payout distribution. No manual coordination needed.Fair Randomness
Winner selection uses Supra VRF (Verifiable Random Function) for provably fair, on-chain randomness.Yield Generation
Member collateral is automatically converted to Ondo mUSD (rebasing token) to earn yield. Winners receive a portion of the yield as a bonus.Collateral Protection
If a member fails to contribute, their collateral is automatically liquidated to cover the contribution, protecting other members.
Team Member
Garry
Telegram: @garrybad
Discord: @garrybad
Email: garrybad3@gmail.com
Github: https://github.com/garrybad/sanca
One Pager Pitch

黑客松進展
The MVP includes a full-stack implementation: Solidity contracts (SancaFactory and SancaPool) using the EIP-1167 minimal proxy pattern for gas-efficient pool creation, a Next.js 16 frontend with React 19 and TypeScript featuring a dashboard, pool management, activity tracking, and an onboarding flow, integration with Supra VRF V3 for verifiable randomness in winner selection, yield generation via Ondo Finance’s mUSD rebasing token so collateral earns yield, a Ponder.sh indexing layer providing a GraphQL API for real-time pool data, and wallet integration with RainbowKit for seamless Web3 interactions. The platform addresses traditional ROSCA issues lack of transparency, manual management, and trust requirements by automating pool lifecycle management through smart contracts, enabling on-chain verification of all transactions, and implementing automatic collateral liquidation for missed contributions. Currently deployed on Mantle Sepolia testnet with comprehensive testing. The architecture demonstrates a scalable approach to decentralized community savings, combining smart contract automation with a modern user interface to make ROSCAs accessible in the Web3 ecosystem.
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