Mandinga

Mandinga is a protocol for organizing community-based credit onchain.

Participants join a circle to access capital for concrete goals such as travel, education, or housing. They commit to fixed monthly installments and choose when they want to receive their payout through early, middle, or late windows.

Instead of relying on informal agreements or centralized operators, Mandinga enforces contributions, payouts, and defaults through smart contracts.

Funds are held and settled in USDC using Arc-native infrastructure, enabling transparent accounting, deterministic settlement, and low operational friction.

By transforming traditional credit circles into programmable financial systems, Mandinga enables scalable, trust-minimized access to capital.

Mandinga is built as production-grade financial infrastructure on EVM, using a modular smart contract architecture. Each credit circle is implemented as a vault contract that manages USDC custody, contribution tracking, and payout execution.

The protocol is composed of three core layers: a Circle contract for capital coordination, ERC721 position NFTs for participant identity and history, and ERC20 claim tokens for exposure and settlement. This separation enables transparent accounting and deterministic settlement, with ERC20 claims representing proportional vault exposure and creating a foundation for future governance and risk coordination at the token level.

Randomized selection is handled using Chainlink VRF, ensuring transparent and verifiable draws. Circle metadata and configuration are resolved through an ENS-based offchain resolver implemented via EIP-3668 (CCIP Read), enabling flexible naming and discovery with minimal onchain overhead.

The protocol is deployed on Arc Testnet with native USDC settlement, reducing operational complexity and improving capital efficiency. All contracts are developed and tested using Solidity and Hardhat, with extensive unit tests covering lifecycle, settlement, and default scenarios.

The frontend is contract-first and reflects the full lifecycle of each circle, exposing contribution status, payout schedules, claim balances, and participation constraints directly from onchain data through direct contract integration.