{"id":50574997,"url":"https://github.com/lambdasistemi/cardano-bbs","last_synced_at":"2026-06-04T21:02:21.887Z","repository":{"id":350680930,"uuid":"1207836268","full_name":"lambdasistemi/cardano-bbs","owner":"lambdasistemi","description":"BBS+ anonymous credentials for Cardano — Haskell off-chain + Aiken on-chain","archived":false,"fork":false,"pushed_at":"2026-04-11T14:14:30.000Z","size":103,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2026-04-11T15:29:59.328Z","etag":null,"topics":["aiken","anonymous-credentials","bbs-plus","bls12-381","cardano","haskell","plutus-v3","zero-knowledge"],"latest_commit_sha":null,"homepage":null,"language":"Shell","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"other","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/lambdasistemi.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2026-04-11T13:22:06.000Z","updated_at":"2026-04-11T13:32:23.000Z","dependencies_parsed_at":null,"dependency_job_id":null,"html_url":"https://github.com/lambdasistemi/cardano-bbs","commit_stats":null,"previous_names":["lambdasistemi/cardano-bbs"],"tags_count":null,"template":false,"template_full_name":null,"purl":"pkg:github/lambdasistemi/cardano-bbs","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lambdasistemi%2Fcardano-bbs","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lambdasistemi%2Fcardano-bbs/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lambdasistemi%2Fcardano-bbs/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lambdasistemi%2Fcardano-bbs/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/lambdasistemi","download_url":"https://codeload.github.com/lambdasistemi/cardano-bbs/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lambdasistemi%2Fcardano-bbs/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":33917202,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-06-04T02:00:06.755Z","response_time":64,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["aiken","anonymous-credentials","bbs-plus","bls12-381","cardano","haskell","plutus-v3","zero-knowledge"],"created_at":"2026-06-04T21:02:20.892Z","updated_at":"2026-06-04T21:02:21.863Z","avatar_url":"https://github.com/lambdasistemi.png","language":"Shell","funding_links":[],"categories":[],"sub_categories":[],"readme":"# cardano-bbs\n\nBBS+ anonymous credentials for Cardano — Haskell off-chain library + Aiken on-chain verifier.\n\n## Status\n\nEarly development.\n\n## Structure\n\n- `offchain/` — Haskell library: BBS+ credential issuance, proof derivation, serialization\n- `onchain/` — Aiken validators: BBS+ proof-of-knowledge verification using CIP-0381 BLS12-381 built-ins\n\n## Delivery Surface\n\nThe flake now separates development, delivery, and verification:\n\n- `devShells.default`\n  - local development environment\n- `packages.zkryptium-ffi`\n  - Rust FFI shared library consumed by the Haskell off-chain package\n- `packages.offchain-library`\n  - Haskell off-chain library built as a real derivation\n- `checks.offchain-tests`\n  - Haskell test suite derivation for the off-chain package\n- `packages.onchain-blueprint`\n  - builds the deployable validator blueprint from [onchain/plutus.json](/code/cardano-bbs-verify/onchain/plutus.json)\n- `packages.budget-cases`\n  - runnable budget measurement tool from [offchain/app/BudgetCases.hs](/code/cardano-bbs-verify/offchain/app/BudgetCases.hs)\n- `checks.offchain-format`\n  - Fourmolu formatting check for the off-chain sources\n- `checks.offchain-lint`\n  - HLint check for the off-chain sources\n- `checks.onchain`\n  - Aiken build, tests, and formatting gate\n- `apps.offchain-tests`, `apps.offchain-format`, `apps.offchain-lint`, `apps.onchain`, `apps.budget-cases`\n  - runnable entrypoints for the single CI checks\n\nThis means CI is no longer “enter a shell and hope”. It has an explicit Nix build surface:\n\n- `nix build .#checks.x86_64-linux.offchain-library .#checks.x86_64-linux.offchain-tests .#checks.x86_64-linux.onchain .#checks.x86_64-linux.onchainBlueprint` realizes the build-heavy derivations first\n- `nix run .#offchain-tests` executes the prebuilt off-chain test component\n- `nix run .#offchain-format` and `nix run .#offchain-lint` execute the single source checks\n- `nix run .#onchain` executes the on-chain gate with stdout visible\n- `nix run .#budget-cases` runs the budget measurement executable\n\n## Development\n\n```bash\nnix develop\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flambdasistemi%2Fcardano-bbs","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Flambdasistemi%2Fcardano-bbs","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flambdasistemi%2Fcardano-bbs/lists"}