# @energyweb/issuer Latest version **7.0.1** (published 2022-03-16) · MIT license · 0 weekly downloads ## Install ```sh npm install @energyweb/issuer pnpm add @energyweb/issuer yarn add @energyweb/issuer bun add @energyweb/issuer ``` ## Health **Score 40/100 (D)** — status: abandoned. Positive: has types; no vulnerabilities; high maintenance score; high quality score. Warnings: low downloads; no esm support; large bundle. Negative: abandoned. ## Facts | | | |---|---| | Version | 7.0.1 | | Published | 2022-03-16 | | First published | 2020-02-05 | | Weekly downloads | 0 | | License | MIT | | TypeScript types | bundled | | Module format | CommonJS | | Dependencies | 12 | | Unpacked size | 17.1 MB | | Known vulnerabilities | 0 (+2 in 1 direct dependencies) | | Install scripts | no | | GitHub stars | 110 | | Maintainers | kyleiankian, energywebdev, aznagy, bagaric, pkosin, drgorb, kroy, manihagh | ## Links - npm: https://www.npmjs.com/package/@energyweb/issuer - Repository: https://github.com/energywebfoundation/origin - Homepage: https://github.com/energywebfoundation/origin/tree/master/packages/issuer - Issues: https://github.com/energywebfoundation/origin/issues - npm.io page: https://npm.io/package/@energyweb/issuer ## Dependencies (12) - [dotenv](https://npm.io/package/dotenv.md) 10.0.0 - [ethers](https://npm.io/package/ethers.md) 5.3.1 - [moment](https://npm.io/package/moment.md) 2.29.1 - [winston](https://npm.io/package/winston.md) 3.3.3 - [ganache-cli](https://npm.io/package/ganache-cli.md) 6.12.2 - [@ethersproject/abi](https://npm.io/package/@ethersproject/abi.md) 5.3.1 - [ew-precise-proofs-js](https://npm.io/package/ew-precise-proofs-js.md) 1.1.0 - [@ethersproject/wallet](https://npm.io/package/@ethersproject/wallet.md) 5.3.0 - [@energyweb/utils-general](https://npm.io/package/@energyweb/utils-general.md) 11.2.3 - [@ethersproject/contracts](https://npm.io/package/@ethersproject/contracts.md) 5.3.0 - [@ethersproject/providers](https://npm.io/package/@ethersproject/providers.md) 5.3.1 - [@ethersproject/abstract-signer](https://npm.io/package/@ethersproject/abstract-signer.md) 5.3.0 ## Recent versions - 7.0.1 (latest) — 2022-03-16 - 6.0.2-alpha.1658756736.0 (canary) — 2022-07-25 - 1.0.2-preview.4091.0 (preview) — 2020-03-16 - 6.0.2-alpha.1658745615.0 — 2022-07-25 - 6.0.2-alpha.1657642980.0 — 2022-07-12 - 6.0.2-alpha.1654697952.0 — 2022-06-08 - 6.0.2-alpha.1651489311.0 — 2022-05-02 - 6.0.2-alpha.1651149594.0 — 2022-04-28 - 7.0.2-alpha.1650636678.0 — 2022-04-22 - 7.0.0 — 2022-03-15 - 6.0.2-alpha.1646656455.0 — 2022-03-07 - 6.0.2-alpha.1646058469.0 — 2022-02-28 - 6.0.2-alpha.1646056819.0 — 2022-02-28 - 6.0.1 — 2022-01-18 - 6.0.1-alpha.1642431088.0 — 2022-01-17 - … 1379 more at https://npm.io/package/@energyweb/issuer/versions ## README

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# Issuer ## Description The Issuer package contains smart contracts and interfaces that handle the management of Energy Attribute Certificates on the blockchain. It is a component of [Energy Web Origin's](https://energy-web-foundation-origin.readthedocs-hosted.com/en/latest/) Traceability SDK. ## Documentation - [Issuer](https://energy-web-foundation-origin.readthedocs-hosted.com/en/latest/traceability/packages/issuer/) - [Traceability SDK](https://energy-web-foundation-origin.readthedocs-hosted.com/en/latest/traceability/) ## Contributing Guidelines See [contributing.md](../../../contributing.md) # Energy Web Decentralized Operating System EW-Origin is a component of the Energy Web Decentralized Operating System (EW-DOS). The purpose of EW-DOS is to develop and deploy an open and decentralized digital operating system for the energy sector in support of a low-carbon, customer-centric energy future. We develop blockchain technology, full-stack applications and middleware packages that facilitate participation of Distributed Energy Resources on the grid and create open market places for transparent and efficient renewable energy trading. - To learn about more about the EW-DOS tech stack, see our [documentation](https://app.gitbook.com/@energy-web-foundation/s/energy-web/) For a deep-dive into the motivation and methodology behind our technical solutions, read our White Papers: - [Energy Web White Paper on Vision and Purpose](https://www.energyweb.org/reports/EWDOS-Vision-Purpose/) - [Energy Web White Paper on Technology Detail](https://www.energyweb.org/wp-content/uploads/2020/06/EnergyWeb-EWDOS-PART2-TechnologyDetail-202006-vFinal.pdf) ## Connect with Energy Web - [Twitter](https://twitter.com/energywebx) - [Discord](https://discord.com/channels/706103009205288990/843970822254362664) - [Telegram](https://t.me/energyweb) ## License This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details ## Notes: `prevCommitment` is required to prevent state corruption, transition to new commitment based on other state that's currently on-chain will result in error. Implementation: - Certificate owner A has 1000kWh of energy on certificate id = 1 (C1) - A requesting private transfer of 500kWh from C1 to B - A calls API with (id, value, newOwner) in our case (1, 500000, B) - if API approves the transfer (enough balance, maybe other API checks) - API returns (updatedBalanceOfA, salt) in our case (500000, 'randomsalt') - A creates onChain request where hash = hash(address, updatedBalanceOfA, salt) in our case hash(A, 5000000, salt) - Issuer - approves by sending new commitment that is verified against the request.hash --- _Source: https://npm.io/package/@energyweb/issuer · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._