# mimblewimble/grin

Minimal implementation of the Mimblewimble protocol.

Repository: https://github.com/mimblewimble/grin
Canonical: https://ross.abutalabs.com/products/grin
Homepage: https://grin.mw/
Language: Rust
License: Apache-2.0
License Family: permissive
Topics: mimblewimble, rust, cryptocurrency, cryptography, zero-knowledge-proofs, grin
Last push: 2026-08-11T21:07:55+00:00

## Health v2 (maintenance only)
Score: 93/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 85, longevity 100
- inputs: {"age_days": 3604, "days_push": 22, "days_rel": 22, "gap_med": 52.0, "n_releases_24m": 7}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5093, forks 979 (observed 2026-08-28T04:09:09.665941+00:00)

## What it is
Grin is a minimal, open-source implementation of the Mimblewimble blockchain protocol, providing a privacy-preserving digital currency with no addresses or visible amounts. It is written in Rust and features Cuckoo Cycle proof of work, transaction aggregation, and prunable chain state for scalability.

## Use cases
- run a privacy-preserving cryptocurrency node
- send and receive digital cash without addresses or visible amounts
- mine a cryptocurrency with Cuckoo Cycle proof of work
- study a minimal Mimblewimble blockchain implementation
- build applications on top of a scalable, prunable blockchain

## When to choose
- you need default-on transaction privacy and fungibility
- you want a lightweight blockchain whose state scales with users rather than transaction history
- you prefer a fair launch with no ICO, pre-mine, or dev tax
- you want a clean, auditable Rust codebase for blockchain research

## When to avoid
- you need smart contracts or programmable assets
- you want a widely adopted currency with deep exchange and merchant support
- you need fast finality or sub-minute confirmation guarantees
- you prefer ASIC-friendly or established proof-of-work ecosystems

## Facets
- artifact type: application
- maturity: active
- function: cryptography, security, networking, p2p
- domain: blockchain, privacy, security
- platform: windows, rust, cli
- tags: mimblewimble, blockchain, privacy-coin, zero-knowledge-proofs, digital-cash, cuckoo-cycle-pow, cryptocurrency, linux, macos

## Member repositories
- mimblewimble/grin (main) score 93

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:09.665941+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:02:31.428528+00:00, confidence not recorded.
  - readme: https://github.com/mimblewimble/grin (fetched 2026-08-28T04:09:09.665941+00:00, sha 8e9632521faf)
  - homepage: https://grin.mw/ (fetched 2026-08-29T08:57:15.274808+00:00, sha 7a4b777cacd3)
  - site_page: https://docs.grin.mw (fetched 2026-08-29T08:57:15.284160+00:00, sha b0674d3477ed)
  - registry_crates: https://crates.io/api/v1/crates/grin (fetched 2026-08-29T08:57:15.286115+00:00, sha 8efa635f376b)
- Data as of 2026-08-30T08:39:29.467469+00:00.