All projects07 / Smart contracts / 2025
Decentralized savings circles on Safrochain: Likelemba, the rotating tontine, on-chain.
- Role
- Design & engineering
- Year
- 2025
- Stack
- CosmWasm, Rust, Safrochain, USDC, TypeScript
(01) Overview
Safrimba modernizes Likelemba, the rotating savings circle (ROSCA) that communities across Africa already rely on. Members create a circle, contribute in SAF or USDC, and each round pays one member out.
A CosmWasm smart contract holds the deposits, enforces the rules and executes every payout automatically, so the circle no longer depends on trusting a single treasurer: every contribution and payout is visible on-chain.
(02) Highlights
- 01Savings circles created and enforced by a CosmWasm smart contract.
- 02Contributions in SAF or USDC, payouts executed automatically each round.
- 03Transparent on-chain history: no single treasurer to trust.
(03) Key facts
- Model
- Likelemba (ROSCA)
- Assets
- SAF, USDC
- Contract
- CosmWasm (Rust)