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Solidity\n[](https://www.npmjs.org/package/openzeppelin-solidity)\n[](https://travis-ci.org/OpenZeppelin/openzeppelin-solidity)\n[](https://coveralls.io/github/OpenZeppelin/openzeppelin-solidity?branch=master)\n\nOpenZeppelin is a library for writing secure [Smart Contracts](https://en.wikipedia.org/wiki/Smart_contract) on Ethereum.\n\nWith OpenZeppelin, you can build distributed applications, protocols and organizations:\n- using common contract security patterns (See [Onward with Ethereum Smart Contract Security](https://medium.com/bitcorps-blog/onward-with-ethereum-smart-contract-security-97a827e47702#.y3kvdetbz))\n- in the [Solidity language](https://solidity.readthedocs.io/en/develop/).\n\n> NOTE: New to smart contract development? Check our [introductory guide](https://medium.com/zeppelin-blog/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05#.cox40d2ut).\n\n## Getting Started\n\nOpenZeppelin integrates with [Truffle](https://github.com/ConsenSys/truffle) and [Embark](https://github.com/embark-framework/embark/).\n\n## Truffle\n\nTo use with Truffle, first install it and initialize your project with `truffle init`.\n\n```sh\nnpm install -g truffle\nmkdir myproject && cd myproject\ntruffle init\n```\n\n## Embark\n\nTo use with Embark, first install it and initialize your project with `embark new MyApp`.\n\n```sh\nnpm install -g embark\nembark new MyApp\ncd MyApp\n```\n\n## Installing OpenZeppelin\n\nAfter installing either Framework, to install the OpenZeppelin library, run the following in your Solidity project root directory:\n\n```sh\nnpm init -y\nnpm install -E openzeppelin-solidity\n```\n\n**Note that OpenZeppelin does not currently follow semantic versioning.** You may encounter breaking changes upon a minor version bump. We recommend pinning the version of OpenZeppelin you use, as done by the `-E` (`--save-exact`) option.\n\nAfter that, you'll get all the library's contracts in the `node_modules/openzeppelin-solidity/contracts` folder. You can use the contracts in the library like so:\n\n```solidity\nimport 'openzeppelin-solidity/contracts/ownership/Ownable.sol';\n\ncontract MyContract is Ownable {\n ...\n}\n```\n\nIf you are using Embark, you can also import directly from github:\n\n```solidity\nimport \"github.com/OpenZeppelin/openzeppelin-solidity/contracts/ownership/Ownable.sol#v1.9.0\";\n\ncontract MyContract is Ownable {\n ...\n}\n```\n\n## Security\nOpenZeppelin is meant to provide secure, tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problem you might experience.\n\nIf you find a security issue, please email [security@openzeppelin.org](mailto:security@openzeppelin.org).\n\n## Developer Resources\n\nBuilding a distributed application, protocol or organization with OpenZeppelin?\n\n- Read documentation: https://openzeppelin.org/api/docs/open-zeppelin.html\n\n- Ask for help and follow progress at: https://slack.openzeppelin.org/\n\nInterested in contributing to OpenZeppelin?\n\n- Framework proposal and roadmap: https://medium.com/zeppelin-blog/zeppelin-framework-proposal-and-development-roadmap-fdfa9a3a32ab#.iain47pak\n- Issue tracker: https://github.com/OpenZeppelin/openzeppelin-solidity/issues\n- Contribution guidelines: https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/CONTRIBUTING.md\n- Wiki: https://github.com/OpenZeppelin/openzeppelin-solidity/wiki\n\n## License\nCode released under the [MIT License](https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/LICENSE).\n","readmeFilename":"README.md","gitHead":"eb4dfea6e9a1cd849cd2e12dd153f03910695f58","_id":"openzeppelin-solidity@1.11.0-rc.1","_npmVersion":"6.1.0","_nodeVersion":"10.5.0","_npmUser":{"name":"frangio","email":"frangio.1@gmail.com"},"dist":{"integrity":"sha512-VFXZvqNNS92O1vB2xISDEF9ZDD4Pm5BnLsQf4L1KmLhud5+tjtPaShW8dISqcVPk+KOpvgOBVPaQy5NugFe3yQ==","shasum":"ff828070aff7f123d06c8cfa222c91684eb0d7a5","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-1.11.0-rc.1.tgz","fileCount":158,"unpackedSize":324777,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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Solidity\n[](https://www.npmjs.org/package/openzeppelin-solidity)\n[](https://travis-ci.org/OpenZeppelin/openzeppelin-solidity)\n[](https://coveralls.io/github/OpenZeppelin/openzeppelin-solidity?branch=master)\n\nOpenZeppelin is a library for writing secure [Smart Contracts](https://en.wikipedia.org/wiki/Smart_contract) on Ethereum.\n\nWith OpenZeppelin, you can build distributed applications, protocols and organizations:\n- using common contract security patterns (See [Onward with Ethereum Smart Contract Security](https://medium.com/bitcorps-blog/onward-with-ethereum-smart-contract-security-97a827e47702#.y3kvdetbz))\n- in the [Solidity language](https://solidity.readthedocs.io/en/develop/).\n\n> NOTE: New to smart contract development? Check our [introductory guide](https://medium.com/zeppelin-blog/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05#.cox40d2ut).\n\n## Getting Started\n\nOpenZeppelin integrates with [Truffle](https://github.com/ConsenSys/truffle) and [Embark](https://github.com/embark-framework/embark/).\n\n## truffle\n\nTo use with Truffle, first install it and initialize your project with `truffle init`.\n\n```sh\nnpm install -g truffle\nmkdir myproject && cd myproject\ntruffle init\n```\n\n## Embark\n\nTo use with Embark, first install it and initialize your project with `embark new MyApp`.\n\n```sh\nnpm install -g embark\nembark new MyApp\ncd MyApp\n```\n\n## Installing OpenZeppelin\n\nAfter installing either Framework, to install the OpenZeppelin library, run the following in your Solidity project root directory:\n\n```sh\nnpm init -y\nnpm install -E openzeppelin-solidity\n```\n\n**Note that OpenZeppelin does not currently follow semantic versioning.** You may encounter breaking changes upon a minor version bump. We recommend pinning the version of OpenZeppelin you use, as done by the `-E` (`--save-exact`) option.\n\nAfter that, you'll get all the library's contracts in the `node_modules/openzeppelin-solidity/contracts` folder. You can use the contracts in the library like so:\n\n```solidity\nimport 'openzeppelin-solidity/contracts/ownership/Ownable.sol';\n\ncontract MyContract is Ownable {\n ...\n}\n```\n\nIf you are using Embark, you can also import directly from github:\n\n```solidity\nimport \"github.com/OpenZeppelin/openzeppelin-solidity/contracts/ownership/Ownable.sol#v1.9.0\";\n\ncontract MyContract is Ownable {\n ...\n}\n```\n\n## Architecture\nThe following provides visibility into how OpenZeppelin's contracts are organized:\n\n- **access** - Smart contracts that enable functionality that can be used for selective restrictions and basic authorization control functions. Includes address whitelisting and signature-based permissions management.\n\t- **rbac** - A library used to manage addresses assigned to different user roles and an example Role-Based Access Control (RBAC) interface that demonstrates how to handle setters and getters for roles and addresses.\n- **crowdsale** - A collection of smart contracts used to manage token crowdsales that allow investors to purchase tokens with ETH. Includes a base contract which implements fundamental crowdsale functionality in its simplest form. The base contract can be extended in order to satisfy your crowdsale’s specific requirements.\n\t- **distribution** - Includes extensions of the base crowdsale contract which can be used to customize the completion of a crowdsale.\n\t- **emission** - Includes extensions of the base crowdsale contract which can be used to mint and manage how tokens are issued to purchasers.\n\t- **price** - Includes extensions of the crowdsale contract that can be used to manage changes in token prices.\n\t- **validation** - Includes extensions of the crowdsale contract that can be used to enforce restraints and limit access to token purchases.\n- **examples** - A collection of simple smart contracts that demonstrate how to add new features to base contracts through multiple inheritance.\n- **introspection** - An interface that can be used to make a contract comply with the ERC-165 standard as well as a contract that implements ERC-165 using a lookup table.\n- **lifecycle** - A collection of base contracts used to manage the existence and behavior of your contracts and their funds.\n- **math** - Libraries with safety checks on operations that throw on errors.\n- **mocks** - A collection of abstract contracts that are primarily used for unit testing. They also serve as good usage examples and demonstrate how to combine contracts with inheritence when developing your own custom applciations.\n- **ownership** - A collection of smart contracts that can be used to manage contract and token ownership\n- **payment** - A collection of smart contracts that can be used to manage payments through escrow arrangements, withdrawals, and claims. Includes support for both single payees and multiple payees.\n- **proposals** - A collection of smart contracts that reflect community Ethereum Improvement Proposals (EIPs). These contracts are under development and standardization. They are not recommended for production, but they are useful for experimentation with pending EIP standards. Go [here](https://github.com/OpenZeppelin/openzeppelin-solidity/wiki/ERC-Process) for more information.\n\n- **token** - A collection of approved ERC standard tokens -- their interfaces and implementations.\n\t- **ERC20** - A standard interface for fungible tokens:\n\t\t- *Interfaces* - Includes the ERC-20 token standard basic interface. I.e., what the contract’s ABI can represent.\n\t\t- *Implementations* - Includes ERC-20 token implementations that include all required and some optional ERC-20 functionality.\n\t- **ERC721** - A standard interface for non-fungible tokens \n\t\t- *Interfaces* - Includes the ERC-721 token standard basic interface. I.e., what the contract’s ABI can represent.\n\t\t- *Implementations* - Includes ERC-721 token implementations that include all required and some optional ERC-721 functionality.\n\n## Tests\nUnit test are critical to the OpenZeppelin framework. They help ensure code quality and mitigate against security vulnerabilities. The directory structure within the `/tests` directory corresponds to the `/contracts` directory. OpenZeppelin uses Mocha’s JavaScript testing framework and Chai’s assertion library. To learn more about how to tests are structured, please reference OpenZeppelin’s Testing Guide.\n\n## How To Use And Modify OpenZeppelin Contracts\nWhen using OpenZeppelin to build your own distributed applications, for security reasons we encourage you NOT to modify the framework’s base contracts, libraries, and interfaces. In order to leverage and extend their functionality, we encourage you to inherit from them or compose them together with your own contracts.\n\nThe Solidity programming language supports multiple inheritance. This is very powerful yet it can also be confusing: the more complexity you introduce to your distributed applications through multiple inheritance, the greater your application’s attack surface is.\n\nYou’ll notice in the `/mocks` directory there are a collection of abstract contracts used primarily for unit testing purposes that can also be used as the foundation for your own custom implementations. These mock contracts demonstrate how OpenZeppelin’s secure base contracts can be used with multiple inheritance.\n\nTo learn more about combining OpenZeppelin contracts with your own custom contracts using multiple inheritance we encourage you to read the following: [On crowdsales and multiple inheritance](https://blog.zeppelin.solutions/on-crowdsales-and-multiple-inheritance-af90c694e35f)\n\n## Security\nOpenZeppelin is meant to provide secure, tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problem you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nIf you find a security issue, please email [security@openzeppelin.org](mailto:security@openzeppelin.org).\n\n## Developer Resources\n\nBuilding a distributed application, protocol or organization with OpenZeppelin?\n\n- Read documentation: https://openzeppelin.org/api/docs/open-zeppelin.html\n\n- Ask for help and follow progress at: https://slack.openzeppelin.org/\n\nInterested in contributing to OpenZeppelin?\n\n- Framework proposal and roadmap: https://medium.com/zeppelin-blog/zeppelin-framework-proposal-and-development-roadmap-fdfa9a3a32ab#.iain47pak\n- Issue tracker: 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\n\n[](https://www.npmjs.org/package/openzeppelin-solidity)\n[](https://travis-ci.org/OpenZeppelin/openzeppelin-solidity)\n[](https://coveralls.io/github/OpenZeppelin/openzeppelin-solidity?branch=master)\n\n**OpenZeppelin is a library for secure smart contract development.** It provides implementations of standards like ERC20 and ERC721 which you can deploy as-is or extend to suit your needs, as well as Solidity components to build custom contracts and more complex decentralized systems.\n\n## Install\n\n```\nnpm install openzeppelin-solidity\n```\n\n## Usage\n\nTo write your custom contracts, import ours and extend them through inheritance.\n\n```solidity\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721.sol';\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Mintable.sol';\n\ncontract MyNFT is ERC721, ERC721Mintable {\n}\n```\n\n> You need an ethereum development framework for the above import statements to work! Check out these guides for [Truffle] or [Embark].\n\nOn our site you will find a few [guides] to learn about the diferent parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our Slack][Slack].\n\n## Security\n\nOpenZeppelin the project is maintained by [Zeppelin] the company, and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide]!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n\n\n[API docs]: https://openzeppelin.org/api/docs/token_ERC721_ERC721BasicToken.html\n[guides]: https://openzeppelin.org/api/docs/get-started.html\n[Slack]: https://slack.openzeppelin.org\n[Zeppelin]: https://zeppelin.solutions\n[contribution guide]: CONTRIBUTING.md\n[Truffle]: https://truffleframework.com/docs/truffle/quickstart\n[Embark]: https://embark.status.im/docs/quick_start.html\n","readmeFilename":"README.md","gitHead":"735996e98378f547c89d74e67631772d420fd314","_id":"openzeppelin-solidity@2.0.0-rc.1","_npmVersion":"6.4.0","_nodeVersion":"10.9.0","_npmUser":{"name":"frangio","email":"frangio.1@gmail.com"},"dist":{"integrity":"sha512-ibGIkt71Kn7NIGHj5UzC/phaLTIlzTkB30H8dBaSzO4h5R576GiETEy2isONqd0QioYec1JsForJJNx8lx7PMg==","shasum":"bc22bb2bb44df0c51ba8197ce33c9c4a2654e92a","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-2.0.0-rc.1.tgz","fileCount":208,"unpackedSize":7382757,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: https://openpgpjs.org\r\n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\nOz+n\r\n=e5lg\r\n-----END PGP SIGNATURE-----\r\n","signatures":[{"keyid":"SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA","sig":"MEUCIAKobB3xfREQXeo/FCNh+7RXgbPcyUIxKRWPJ8fapWjOAiEAq2lhbmJcgID02A47rVcbzl54gdt1+fk5Pt8uQc3Ctqc="}]},"maintainers":[{"email":"facundo_spagnuolo@icloud.com","name":"facuspagnuolo"},{"email":"frangio.1@gmail.com","name":"frangio"},{"email":"manuelaraoz@gmail.com","name":"maraoz"}],"directories":{},"_npmOperationalInternal":{"host":"s3://npm-registry-packages","tmp":"tmp/openzeppelin-solidity_2.0.0-rc.1_1536342734521_0.20314380549259914"},"_hasShrinkwrap":false},"2.0.0-rc.2":{"name":"openzeppelin-solidity","version":"2.0.0-rc.2","description":"Secure Smart Contract library for Solidity","scripts":{"test":"scripts/test.sh","lint:js":"eslint .","lint:js:fix":"eslint . --fix","lint:sol":"solium -d .","lint:sol:fix":"solium -d . --fix","lint":"npm run lint:js && npm run lint:sol","lint:fix":"npm run lint:js:fix && npm run lint:sol:fix","console":"truffle console","coverage":"scripts/coverage.sh","version":"scripts/version.js"},"repository":{"type":"git","url":"git+https://github.com/OpenZeppelin/zeppelin-solidity.git"},"keywords":["solidity","ethereum","smart","contracts","security","zeppelin"],"author":{"name":"OpenZeppelin Community","email":"maintainers@openzeppelin.org"},"license":"MIT","bugs":{"url":"https://github.com/OpenZeppelin/zeppelin-solidity/issues"},"homepage":"https://github.com/OpenZeppelin/zeppelin-solidity","devDependencies":{"chai":"^4.1.2","chai-bignumber":"^2.0.2","coveralls":"^3.0.1","dotenv":"^4.0.0","eslint":"^4.19.1","eslint-config-standard":"^10.2.1","eslint-plugin-import":"^2.13.0","eslint-plugin-node":"^5.2.1","eslint-plugin-promise":"^3.8.0","eslint-plugin-standard":"^3.1.0","ethjs-abi":"^0.2.1","ganache-cli":"6.1.0","solidity-coverage":"^0.5.4","solium":"^1.1.8","truffle":"^4.1.13","truffle-hdwallet-provider":"0.0.5","web3-utils":"^1.0.0-beta.34"},"readme":"# \n\n[](https://www.npmjs.org/package/openzeppelin-solidity)\n[](https://travis-ci.org/OpenZeppelin/openzeppelin-solidity)\n[](https://coveralls.io/github/OpenZeppelin/openzeppelin-solidity?branch=master)\n\n**OpenZeppelin is a library for secure smart contract development.** It provides implementations of standards like ERC20 and ERC721 which you can deploy as-is or extend to suit your needs, as well as Solidity components to build custom contracts and more complex decentralized systems.\n\n## Install\n\n```\nnpm install openzeppelin-solidity\n```\n\n## Usage\n\nTo write your custom contracts, import ours and extend them through inheritance.\n\n```solidity\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721.sol';\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Mintable.sol';\n\ncontract MyNFT is ERC721, ERC721Mintable {\n}\n```\n\n> You need an ethereum development framework for the above import statements to work! Check out these guides for [Truffle] or [Embark].\n\nOn our site you will find a few [guides] to learn about the diferent parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our Slack][Slack].\n\n## Security\n\nOpenZeppelin the project is maintained by [Zeppelin] the company, and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. 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Check out these guides for [Truffle] or [Embark].\n\nOn our site you will find a few [guides] to learn about the diferent parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our Slack][Slack].\n\n## Security\n\nOpenZeppelin the project is maintained by [Zeppelin] the company, and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! 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Check out the [contribution guide]!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n\n\n[API docs]: https://openzeppelin.org/api/docs/token_ERC721_ERC721BasicToken.html\n[guides]: https://openzeppelin.org/api/docs/get-started.html\n[Slack]: https://slack.openzeppelin.org\n[Zeppelin]: https://zeppelin.solutions\n[contribution guide]: CONTRIBUTING.md\n[Truffle]: https://truffleframework.com/docs/truffle/quickstart\n[Embark]: https://embark.status.im/docs/quick_start.html\n","readmeFilename":"README.md","_id":"openzeppelin-solidity@2.0.0-rc.3","_npmVersion":"5.6.0","_nodeVersion":"9.5.0","_npmUser":{"name":"nventuro","email":"nicolas.venturo@gmail.com"},"dist":{"integrity":"sha512-+3LFCp2Bl7zDRycVKz4z4KTc3vReNFH+7iWoc+sajlPGC+kTTSNd2YFd/PvPgiPGyEup7aQ1tE/srnW7zcuQGQ==","shasum":"2a75455b8b33a4552fb0e93a12590b4d7d0d1d18","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-2.0.0-rc.3.tgz","fileCount":211,"unpackedSize":7302176,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: https://openpgpjs.org\r\n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\nkr5h\r\n=hRYn\r\n-----END PGP SIGNATURE-----\r\n","signatures":[{"keyid":"SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA","sig":"MEUCIDK5S3+OxreZs+BAAz8eBqWdjkd2o53BBI/IHwJWWvekAiEA5JomFRoc4BXHpSIN99bn5BLlGauKsPN4OKWkg8D8aR4="}]},"maintainers":[{"email":"facundo_spagnuolo@icloud.com","name":"facuspagnuolo"},{"email":"frangio.1@gmail.com","name":"frangio"},{"email":"manuelaraoz@gmail.com","name":"maraoz"}],"directories":{},"_npmOperationalInternal":{"host":"s3://npm-registry-packages","tmp":"tmp/openzeppelin-solidity_2.0.0-rc.3_1539362442973_0.7965507007929271"},"_hasShrinkwrap":false},"2.0.0-rc.4":{"name":"openzeppelin-solidity","version":"2.0.0-rc.4","description":"Secure Smart Contract library for Solidity","scripts":{"test":"scripts/test.sh","lint:js":"eslint .","lint:js:fix":"eslint . --fix","lint:sol":"solium -d .","lint:sol:fix":"solium -d . --fix","lint":"npm run lint:js && npm run lint:sol","lint:fix":"npm run lint:js:fix && npm run lint:sol:fix","console":"truffle console","coverage":"scripts/coverage.sh","version":"scripts/version.js"},"repository":{"type":"git","url":"git+https://github.com/OpenZeppelin/zeppelin-solidity.git"},"keywords":["solidity","ethereum","smart","contracts","security","zeppelin"],"author":{"name":"OpenZeppelin Community","email":"maintainers@openzeppelin.org"},"license":"MIT","bugs":{"url":"https://github.com/OpenZeppelin/zeppelin-solidity/issues"},"homepage":"https://github.com/OpenZeppelin/zeppelin-solidity","devDependencies":{"chai":"^4.1.2","chai-bignumber":"^2.0.2","coveralls":"^3.0.1","dotenv":"^4.0.0","eslint":"^4.19.1","eslint-config-standard":"^10.2.1","eslint-plugin-import":"^2.13.0","eslint-plugin-node":"^5.2.1","eslint-plugin-promise":"^3.8.0","eslint-plugin-standard":"^3.1.0","ethjs-abi":"^0.2.1","ganache-cli":"6.1.0","solidity-coverage":"^0.5.4","solium":"^1.1.8","truffle":"^4.1.13","truffle-hdwallet-provider":"0.0.5","web3-utils":"^1.0.0-beta.34"},"readme":"# \n\n[](https://www.npmjs.org/package/openzeppelin-solidity)\n[](https://travis-ci.org/OpenZeppelin/openzeppelin-solidity)\n[](https://coveralls.io/github/OpenZeppelin/openzeppelin-solidity?branch=master)\n\n**OpenZeppelin is a library for secure smart contract development.** It provides implementations of standards like ERC20 and ERC721 which you can deploy as-is or extend to suit your needs, as well as Solidity components to build custom contracts and more complex decentralized systems.\n\n## Install\n\n```\nnpm install openzeppelin-solidity\n```\n\n## Usage\n\nTo write your custom contracts, import ours and extend them through inheritance.\n\n```solidity\npragma solidity ^0.4.24;\n\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Full.sol';\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Mintable.sol';\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n> You need an ethereum development framework for the above import statements to work! Check out these guides for [Truffle] or [Embark].\n\nOn our site you will find a few [guides] to learn about the diferent parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our Slack][Slack].\n\n## Security\n\nOpenZeppelin the project is maintained by [Zeppelin] the company, and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! 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Check out the [contribution guide]!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n\n\n[API docs]: https://openzeppelin.org/api/docs/token_ERC721_ERC721BasicToken.html\n[guides]: https://openzeppelin.org/api/docs/get-started.html\n[Slack]: https://slack.openzeppelin.org\n[Zeppelin]: https://zeppelin.solutions\n[contribution guide]: CONTRIBUTING.md\n[Truffle]: https://truffleframework.com/docs/truffle/quickstart\n[Embark]: https://embark.status.im/docs/quick_start.html\n","readmeFilename":"README.md","gitHead":"7789814606e6e7a485d386d25ab84f0445246f8f","_id":"openzeppelin-solidity@2.0.0-rc.4","_npmVersion":"5.6.0","_nodeVersion":"8.11.4","_npmUser":{"name":"elopio","email":"yo@elopio.net"},"dist":{"integrity":"sha512-SWbf/9aK+mtbNFSixLhDcDjTZLTJ0aNcmyOEcShJeJe+MOeJ2ORjRw2hw+5DWSdiILwjBekAVk85SNXiCEltyA==","shasum":"9024a296c3621fc3adfe8c2f99f4a376bb330cb8","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-2.0.0-rc.4.tgz","fileCount":310,"unpackedSize":15551220,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: https://openpgpjs.org\r\n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\nmGaH\r\n=V5aO\r\n-----END PGP SIGNATURE-----\r\n","signatures":[{"keyid":"SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA","sig":"MEUCIHIsu54Hd6lbNEFBatR1jubUcB2dIwf9z6LVlY1GlHG8AiEAp8o1EPhkHLV2oHmrHh0OTtRiLIdjaz3g507/QkqpDZg="}]},"maintainers":[{"email":"facundo_spagnuolo@icloud.com","name":"facuspagnuolo"},{"email":"frangio.1@gmail.com","name":"frangio"},{"email":"manuelaraoz@gmail.com","name":"maraoz"}],"directories":{},"_npmOperationalInternal":{"host":"s3://npm-registry-packages","tmp":"tmp/openzeppelin-solidity_2.0.0-rc.4_1540083669318_0.31948143797987827"},"_hasShrinkwrap":false},"2.0.0-rc.5":{"name":"openzeppelin-solidity","version":"2.0.0-rc.5","description":"Secure Smart Contract library for Solidity","scripts":{"test":"scripts/test.sh","lint:js":"eslint .","lint:js:fix":"eslint . --fix","lint:sol":"solium -d .","lint:sol:fix":"solium -d . --fix","lint":"npm run lint:js && npm run lint:sol","lint:fix":"npm run lint:js:fix && npm run lint:sol:fix","console":"truffle console","coverage":"scripts/coverage.sh","version":"scripts/version.js"},"repository":{"type":"git","url":"git+https://github.com/OpenZeppelin/zeppelin-solidity.git"},"keywords":["solidity","ethereum","smart","contracts","security","zeppelin"],"author":{"name":"OpenZeppelin Community","email":"maintainers@openzeppelin.org"},"license":"MIT","bugs":{"url":"https://github.com/OpenZeppelin/zeppelin-solidity/issues"},"homepage":"https://github.com/OpenZeppelin/zeppelin-solidity","devDependencies":{"chai":"^4.1.2","chai-bignumber":"^2.0.2","coveralls":"^3.0.1","dotenv":"^4.0.0","eslint":"^4.19.1","eslint-config-standard":"^10.2.1","eslint-plugin-import":"^2.13.0","eslint-plugin-node":"^5.2.1","eslint-plugin-promise":"^3.8.0","eslint-plugin-standard":"^3.1.0","ethjs-abi":"^0.2.1","ganache-cli":"6.1.0","solidity-coverage":"^0.5.4","solium":"^1.1.8","truffle":"^4.1.13","truffle-hdwallet-provider":"0.0.5","web3-utils":"^1.0.0-beta.34"},"readme":"# \n\n[](https://www.npmjs.org/package/openzeppelin-solidity)\n[](https://travis-ci.org/OpenZeppelin/openzeppelin-solidity)\n[](https://coveralls.io/github/OpenZeppelin/openzeppelin-solidity?branch=master)\n\n**OpenZeppelin is a library for secure smart contract development.** It provides implementations of standards like ERC20 and ERC721 which you can deploy as-is or extend to suit your needs, as well as Solidity components to build custom contracts and more complex decentralized systems.\n\n## Install\n\n```\nnpm install openzeppelin-solidity\n```\n\n## Usage\n\nTo write your custom contracts, import ours and extend them through inheritance.\n\n```solidity\npragma solidity ^0.4.24;\n\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Full.sol';\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Mintable.sol';\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n> You need an ethereum development framework for the above import statements to work! Check out these guides for [Truffle] or [Embark].\n\nOn our site you will find a few [guides] to learn about the diferent parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our Slack][Slack].\n\n## Security\n\nOpenZeppelin the project is maintained by [Zeppelin] the company, and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! 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Check out these guides for [Truffle] or [Embark].\n\nOn our site you will find a few [guides] to learn about the diferent parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our Slack][Slack].\n\n## Security\n\nOpenZeppelin the project is maintained by [Zeppelin] the company, and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! 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It provides implementations of standards like ERC20 and ERC721 which you can deploy as-is or extend to suit your needs, as well as Solidity components to build custom contracts and more complex decentralized systems.\n\n## Install\n\n```\nnpm install openzeppelin-solidity\n```\n\nIf you're interested in trying out a preview of OpenZeppelin 2.0, install `openzeppelin-solidity@next`, check out the [release notes](https://github.com/OpenZeppelin/openzeppelin-solidity/releases/tag/v2.0.0-rc.1), and let us know what you think!\n\n## Usage\n\nTo write your custom contracts, import ours and extend them through inheritance.\n\n```solidity\npragma solidity ^0.4.24;\n\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Full.sol';\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Mintable.sol';\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n> You need an ethereum development framework for the above import 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Check out these guides for [Truffle] or [Embark].\n\nOn our site you will find a few [guides] to learn about the diferent parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our Slack][Slack].\n\n## Security\n\nOpenZeppelin the project is maintained by [Zeppelin] the company, and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! 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\n\n[](https://www.npmjs.org/package/openzeppelin-solidity)\n[](https://travis-ci.com/OpenZeppelin/openzeppelin-solidity)\n[](https://coveralls.io/github/OpenZeppelin/openzeppelin-solidity?branch=master)\n\n**OpenZeppelin is a library for secure smart contract development.** It provides implementations of standards like ERC20 and ERC721 which you can deploy as-is or extend to suit your needs, as well as Solidity components to build custom contracts and more complex decentralized systems.\n\n## Install\n\n```\nnpm install openzeppelin-solidity\n```\n\n## Usage\n\nTo write your custom contracts, import ours and extend them through inheritance.\n\n```solidity\npragma solidity ^0.5.0;\n\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Full.sol';\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Mintable.sol';\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n> You need an ethereum development framework for the above import statements to work! Check out these guides for [Truffle] or [Embark].\n\nOn our site you will find a few [guides] to learn about the different parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our Slack][Slack].\n\n## Security\n\nOpenZeppelin the project is maintained by [Zeppelin] the company, and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! 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You can read ṫhe details in our [API Stability](https://forum.zeppelin.solutions/t/api-stability/138) document.\n\n## Usage\n\nTo write your custom contracts, import ours and extend them through inheritance.\n\n```solidity\npragma solidity ^0.5.0;\n\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Full.sol';\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Mintable.sol';\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n> You need an ethereum development framework for the above import statements to work! Check out these guides for [Truffle], [Embark] or [Buidler].\n\nOn our site you will find a few [guides] to learn about the different parts of OpenZeppelin, as well as [documentation for the API][API docs]. 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Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our forum][forum].\n\n## Security\n\nOpenZeppelin the project is maintained by [Zeppelin] the company, and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! 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You can read ṫhe details in our [API Stability](https://forum.zeppelin.solutions/t/api-stability/138) document.\n\n## Usage\n\nTo write your custom contracts, import ours and extend them through inheritance.\n\n```solidity\npragma solidity ^0.5.0;\n\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Full.sol';\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Mintable.sol';\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n> You need an ethereum development framework for the above import statements to work! Check out these guides for [Truffle], [Embark] or [Buidler].\n\nOn our site you will find a few [guides] to learn about the different parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our forum][forum].\n\n## Security\n\nOpenZeppelin the project is maintained by [Zeppelin] the company, and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! 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You can read ṫhe details in our [API Stability](https://forum.zeppelin.solutions/t/api-stability/138) document.\n\n## Usage\n\nTo write your custom contracts, import ours and extend them through inheritance.\n\n```solidity\npragma solidity ^0.5.0;\n\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Full.sol';\nimport 'openzeppelin-solidity/contracts/token/ERC721/ERC721Mintable.sol';\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n> You need an ethereum development framework for the above import statements to work! Check out these guides for [Truffle], [Embark] or [Buidler].\n\nOn our site you will find a few [guides] to learn about the different parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our forum][forum].\n\n## Security\n\nOpenZeppelin the project is maintained by [Zeppelin] the company, and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! 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You can read ṫhe details in our [API Stability] document.\n\n## Usage\n\nTo write your custom contracts, import ours and extend them through inheritance.\n\n```solidity\npragma solidity ^0.5.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Full.sol\";\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Mintable.sol\";\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n> You need an ethereum development framework for the above import statements to work! Check out these guides for [Truffle], [Embark] or [Buidler].\n\nOn our site you will find a few [guides] to learn about the different parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our forum][forum].\n\n## Security\n\nThis project is maintained by [OpenZeppelin], and developed following our high standards for code quality and security. 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You can read ṫhe details in our [API Stability] document.\n\n## Usage\n\nTo write your custom contracts, import ours and extend them through inheritance.\n\n```solidity\npragma solidity ^0.5.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Full.sol\";\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Mintable.sol\";\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n> You need an ethereum development framework for the above import statements to work! Check out these guides for [Truffle], [Embark] or [Buidler].\n\nOn our site you will find a few [guides] to learn about the different parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our forum][forum].\n\n## Security\n\nThis project is maintained by [OpenZeppelin], and developed following our high standards for code quality and security. 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You can read ṫhe details in our [API Stability] document.\n\n## Usage\n\nTo write your custom contracts, import ours and extend them through inheritance.\n\n```solidity\npragma solidity ^0.5.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Full.sol\";\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Mintable.sol\";\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n> You need an ethereum development framework for the above import statements to work! Check out these guides for [Truffle], [Embark] or [Buidler].\n\nOn our site you will find a few [guides] to learn about the different parts of OpenZeppelin, as well as [documentation for the API][API docs]. Keep in mind that the API docs are work in progress, and don’t hesitate to ask questions in [our forum][forum].\n\n## Security\n\nThis project is maintained by [OpenZeppelin], and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. 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\n\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://circleci.com/gh/OpenZeppelin/openzeppelin-contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n * First-class integration with the [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn) for systems with no gas fees!\n * Audited by leading security firms.\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means your contracts won't break unexpectedly when upgrading to a newer minor version.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.5.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Full.sol\";\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Mintable.sol\";\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/contracts/learn::developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself.\n\n## Learn More\n\nThe guides in the sidebar will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"e4a8a5533e8d3157ec398d2e5597cdd81410e4cc","_id":"openzeppelin-solidity@2.5.0-rc.0","_nodeVersion":"10.16.3","_npmVersion":"6.12.0","dist":{"integrity":"sha512-8eMjXBObnOjE8MVxQ1TW1sYGKoGVgeKnlCo9DZt+vIwZlfIMn/jICzD3sIesbDnUT3BGSGyE4mIKXnaSSY+dUQ==","shasum":"190524909e76819906aad0619dcc0a5a97ffb032","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-2.5.0-rc.0.tgz","fileCount":264,"unpackedSize":11364410,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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\n\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://circleci.com/gh/OpenZeppelin/openzeppelin-contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n * First-class integration with the [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn) for systems with no gas fees!\n * Audited by leading security firms.\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means your contracts won't break unexpectedly when upgrading to a newer minor version.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.5.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Full.sol\";\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Mintable.sol\";\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the sidebar will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"9188faa2fa2ac680881775b6226cb2d64180a5c4","_id":"openzeppelin-solidity@3.0.0-beta.0","_nodeVersion":"10.17.0","_npmVersion":"6.13.6","dist":{"integrity":"sha512-lwCPDIj2CMBcUGOHAMtJbWn2Rb1R6pJJeH/Gzari/VEt5XwgU/fWVo9TRjWyE9KBhH+36mlSKpCaskzvn+KMZw==","shasum":"9be6d4ffc1975a13e01594c1ad9bcc70eec58e65","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-3.0.0-beta.0.tgz","fileCount":194,"unpackedSize":9093010,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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\n\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://circleci.com/gh/OpenZeppelin/openzeppelin-contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n * First-class integration with the [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn) for systems with no gas fees!\n * Audited by leading security firms.\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means your contracts won't break unexpectedly when upgrading to a newer minor version.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.5.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Full.sol\";\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Mintable.sol\";\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the sidebar will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"a3c6e5f088c50a15b588f13d94bae27cbe3e5629","_id":"openzeppelin-solidity@3.0.0-rc.0","_nodeVersion":"10.17.0","_npmVersion":"6.13.6","dist":{"integrity":"sha512-cftpu1YvJgYbYcUVlTAOi+JvMF+hkvwdjLtA3ZLiBjVfEsf5HQGKL293dr/F31PRZSGurH+31Y0RxOPUvExGQQ==","shasum":"8e8328749ad5f4e8e65a8364e5e12b956e0a22f1","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-3.0.0-rc.0.tgz","fileCount":185,"unpackedSize":9035403,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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\n\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://circleci.com/gh/OpenZeppelin/openzeppelin-contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n * First-class integration with the [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn) for systems with no gas fees!\n * Audited by leading security firms.\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means your contracts won't break unexpectedly when upgrading to a newer minor version.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.5.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Full.sol\";\nimport \"@openzeppelin/contracts/token/ERC721/ERC721Mintable.sol\";\n\ncontract MyNFT is ERC721Full, ERC721Mintable {\n constructor() ERC721Full(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the sidebar will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"63a3665a171acb1db8c16914f6b57124461b94ae","_id":"openzeppelin-solidity@3.0.0-rc.1","_nodeVersion":"10.17.0","_npmVersion":"6.14.4","dist":{"integrity":"sha512-23vHZLUGGaC3mes2GdniB62S+5bWEWw36LQggE5I1iMpStoreYLy1lW39fxJxVQiMqXQyMYsJdEHDQagCEcbDQ==","shasum":"b6b4134d68c3e51c1d1b2cbaecc76475494d1356","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-3.0.0-rc.1.tgz","fileCount":290,"unpackedSize":18207681,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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\n\n[](https://docs.openzeppelin.com/contracts)\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://circleci.com/gh/OpenZeppelin/openzeppelin-contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n * First-class integration with the [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn) for systems with no gas fees!\n * Audited by leading security firms (_last full audit on v2.0.0_).\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means your contracts won't break unexpectedly when upgrading to a newer minor version.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.6.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721.sol\";\n\ncontract MyNFT is ERC721 {\n constructor() ERC721(\"MyNFT\", \"MNFT\") public {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the sidebar will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"8c1daaab57fdd390b2a7d89aa41e9a783068ee61","_id":"openzeppelin-solidity@3.1.0-rc.0","_nodeVersion":"10.17.0","_npmVersion":"6.14.4","dist":{"integrity":"sha512-WE3BkDY820xWWIrWsjwXsfePPi46gkrZHAzb6dp0py4Hrjk6Le0Nk/AB4yR7alh9rPiaX5jFQR9+eRBqHBNRWw==","shasum":"67a2197614cdc6035756438be34af7d3a17c3e3c","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-3.1.0-rc.0.tgz","fileCount":321,"unpackedSize":20662768,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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![\"OpenZeppelin\"](\"logo.svg\")
\n\n[](https://docs.openzeppelin.com/contracts)\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://circleci.com/gh/OpenZeppelin/openzeppelin-contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n * First-class integration with the [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn) for systems with no gas fees!\n * Audited by leading security firms (_last full audit on v2.0.0_).\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means your contracts won't break unexpectedly when upgrading to a newer minor version.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.6.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721.sol\";\n\ncontract MyCollectible is ERC721 {\n constructor() ERC721(\"MyCollectible\", \"MCO\") public {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"f2fb8cf23b5f2b868f986ad91369e5004842c274","_id":"openzeppelin-solidity@3.2.0-rc.0","_nodeVersion":"10.22.0","_npmVersion":"6.14.6","dist":{"integrity":"sha512-xhTXoTBnLS4eOcTMSxp3geRkJA+EqWaSkV38M5VoKhzDseYGSjoFmDMLK3lY4EiYxLX572Lm+K/t3rm2hLUNKA==","shasum":"9376e354373c8f00b42e2cf86eed600f7169db73","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-3.2.0-rc.0.tgz","fileCount":160,"unpackedSize":7876936,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: 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\n\n[](https://docs.openzeppelin.com/contracts)\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n * First-class integration with the [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn) for systems with no gas fees!\n * [Audited](https://github.com/OpenZeppelin/openzeppelin-contracts/tree/master/audit) by leading security firms (_last full audit on v2.0.0_).\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means your contracts won't break unexpectedly when upgrading to a newer minor version.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.6.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721.sol\";\n\ncontract MyCollectible is ERC721 {\n constructor() ERC721(\"MyCollectible\", \"MCO\") public {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"25ac33486c4b6d7cc321ef3a26950a98c11157fb","_id":"openzeppelin-solidity@3.3.0-rc.0","_nodeVersion":"10.22.1","_npmVersion":"6.14.8","dist":{"integrity":"sha512-S/gPx4ZAIHbua8VzcdisoVNud1SyIhRY/1yMTvAq49d6oocUc+KO9OEeVtm5Mi4+W+kQL6/EeF6rim8J0pY+lQ==","shasum":"b880aabb655e9b9f278b940e6e0e668ac7a44efa","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-3.3.0-rc.0.tgz","fileCount":161,"unpackedSize":1158718,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.13\r\nComment: 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\n\n[](https://docs.openzeppelin.com/contracts)\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n * First-class integration with the [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn) for systems with no gas fees!\n * [Audited](https://github.com/OpenZeppelin/openzeppelin-contracts/tree/master/audit) by leading security firms (_last full audit on v2.0.0_).\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means your contracts won't break unexpectedly when upgrading to a newer minor version.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.6.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721.sol\";\n\ncontract MyCollectible is ERC721 {\n constructor() ERC721(\"MyCollectible\", \"MCO\") public {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"c67d81bae18f977790ee3b4af6de5cd7952930a2","_id":"openzeppelin-solidity@3.3.0-rc.1","_nodeVersion":"10.22.1","_npmVersion":"6.14.8","dist":{"integrity":"sha512-H6tkHfGveM2by7lX/R4KktE1wim3LqmuyduCae8vpLBAX4b7kpX0pRECCkXTbY6SmHbGxeptlkM/3UgVvWokIg==","shasum":"9a8624222d958e6eaf4730d5d63cafd6446f411d","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-3.3.0-rc.1.tgz","fileCount":162,"unpackedSize":1165026,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.13\r\nComment: 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\n\n[](https://docs.openzeppelin.com/contracts)\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n * First-class integration with the [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn) for systems with no gas fees!\n * [Audited](https://github.com/OpenZeppelin/openzeppelin-contracts/tree/master/audit) by leading security firms (_last full audit on v2.0.0_).\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means your contracts won't break unexpectedly when upgrading to a newer minor version.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.6.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721.sol\";\n\ncontract MyCollectible is ERC721 {\n constructor() ERC721(\"MyCollectible\", \"MCO\") public {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"1fccf6fa53aa811c591b02dc4c5b07db2aa054b6","_id":"openzeppelin-solidity@3.3.0-rc.2","_nodeVersion":"10.22.1","_npmVersion":"6.14.8","dist":{"integrity":"sha512-wW9VqBr2pDPShTvemgddHnl5J9eXXFB69IzARIeIrbtA3Tl/QSL5JQ5zm0VE1GFqwE/rbhTtDWU2pFNt1CTU/g==","shasum":"fd984510dab5f2d8c67375667aba83c60894f28e","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-3.3.0-rc.2.tgz","fileCount":162,"unpackedSize":1164831,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.13\r\nComment: 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\n\n[](https://docs.openzeppelin.com/contracts)\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n * First-class integration with the [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn) for systems with no gas fees!\n * [Audited](https://github.com/OpenZeppelin/openzeppelin-contracts/tree/master/audit) by leading security firms (_last full audit on v2.0.0_).\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means your contracts won't break unexpectedly when upgrading to a newer minor version.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.6.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721.sol\";\n\ncontract MyCollectible is ERC721 {\n constructor() ERC721(\"MyCollectible\", \"MCO\") public {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"ff300b10e1c659ac4b5690e00e7a4f883dc0b430","_id":"openzeppelin-solidity@3.4.0-rc.0","_nodeVersion":"12.20.0","_npmVersion":"6.14.8","dist":{"integrity":"sha512-RvH1k7vlyFpyli0NkvjddIrsNAWVrxKdnuFlEI/B3L8UvouTYndmZHcrOf0pfrjWVtz4mHYyqUKGfSe1BwFLNw==","shasum":"ab145803d4e7ca38f2cea43181f2d0e3ad76229a","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-3.4.0-rc.0.tgz","fileCount":182,"unpackedSize":1323894,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.13\r\nComment: 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\n\n[](https://docs.openzeppelin.com/contracts)\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n * First-class integration with the [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn) for systems with no gas fees!\n * [Audited](https://github.com/OpenZeppelin/openzeppelin-contracts/tree/master/audit) by leading security firms (_last full audit on v2.0.0_).\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means your contracts won't break unexpectedly when upgrading to a newer minor version.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721.sol\";\n\ncontract MyCollectible is ERC721 {\n constructor() ERC721(\"MyCollectible\", \"MCO\") {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"556cdf5f1ac86912c6a90535dd8a6c904311ec67","_id":"openzeppelin-solidity@4.0.0-beta.0","_nodeVersion":"14.15.5","_npmVersion":"7.5.2","dist":{"integrity":"sha512-hiIdRIRf/VLFm2YtWC79EaRyxhM/RI/eh0YT0oKYbV7IRiIOO0UT4Bl5K6zEa8yYjnDAOuR0MtRYl4Z2LdCWbg==","shasum":"c916d6f28ecd6ef202ff4ec123af7ab099d5175a","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-4.0.0-beta.0.tgz","fileCount":225,"unpackedSize":1317096,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.13\r\nComment: https://openpgpjs.org\r\n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\nbCkM\r\n=22Dz\r\n-----END PGP SIGNATURE-----\r\n","signatures":[{"keyid":"SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA","sig":"MEQCIGYVUK4pb5ciM3kZU9Qj+MsDwr0iSFh6ypwV9Cauw76RAiBwIFcy2KPCiDgIivQYDjqh/mWONQ01433Spf8wToPhrQ=="}]},"_npmUser":{"name":"frangio","email":"frangio.1@gmail.com"},"directories":{},"maintainers":[{"name":"elopio","email":"yo@elopio.net"},{"name":"frangio","email":"frangio.1@gmail.com"},{"name":"spalladino","email":"spalladino@gmail.com"}],"_npmOperationalInternal":{"host":"s3://npm-registry-packages","tmp":"tmp/openzeppelin-solidity_4.0.0-beta.0_1614026767520_0.5646438919949559"},"_hasShrinkwrap":false},"4.0.0-beta.1":{"name":"openzeppelin-solidity","description":"Secure Smart Contract library for Solidity","version":"4.0.0-beta.1","bin":{"openzeppelin-contracts-migrate-imports":"scripts/migrate-imports.js"},"scripts":{"compile":"hardhat compile","coverage":"hardhat coverage","docs":"oz-docs","docs:watch":"npm run docs watch contracts 'docs/*.hbs'","prepare-docs":"scripts/prepare-docs.sh","lint":"npm run lint:js && npm run lint:sol","lint:fix":"npm run lint:js:fix","lint:js":"eslint --ignore-path .gitignore .","lint:js:fix":"eslint --ignore-path .gitignore . --fix","lint:sol":"echo 'solidity linter currently disabled' # 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The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"ae1e384a9a11e9af8910ebf8a10d534a83cd41f9","_id":"openzeppelin-solidity@4.0.0-beta.1","_nodeVersion":"14.16.0","_npmVersion":"6.14.11","dist":{"integrity":"sha512-5w1nDTAsyU1znZ88BwuVVoJ23CnL/E1rIksuAKCa6Smfxq77x3+rbcM8iv7h1ifnJOq2CjNAWbNuvpVbLAv0yA==","shasum":"1b1e3a8615fa112549c3722146dcffec22dbf226","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-4.0.0-beta.1.tgz","fileCount":179,"unpackedSize":1022753,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.13\r\nComment: 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\n\n[](https://docs.openzeppelin.com/contracts)\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n * First-class integration with the [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn) for systems with no gas fees!\n * [Audited](https://github.com/OpenZeppelin/openzeppelin-contracts/tree/master/audit) by leading security firms (_last full audit on v2.0.0_).\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means your contracts won't break unexpectedly when upgrading to a newer minor version.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721.sol\";\n\ncontract MyCollectible is ERC721 {\n constructor() ERC721(\"MyCollectible\", \"MCO\") {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"1ee939e7c4b2c1fe84e6f5b6a7c1ce5e7d91667f","_id":"openzeppelin-solidity@4.0.0-rc.0","_nodeVersion":"14.15.3","_npmVersion":"6.14.11","dist":{"integrity":"sha512-uwvA9mwNQxHqZ83CTrWXfDmgUTA8kGs1CJMhOA2Kyt74o1mMJcN77CGxA4/hLAgvmYjrkOVKegBuofgpclIAng==","shasum":"47fb9a3240d3f9b98863f4d16f0f5b8c78d5fd14","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-4.0.0-rc.0.tgz","fileCount":181,"unpackedSize":1027332,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.13\r\nComment: https://openpgpjs.org\r\n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\nX4mK\r\n=Rhgr\r\n-----END PGP SIGNATURE-----\r\n","signatures":[{"keyid":"SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA","sig":"MEQCIC+aBTrXGcMtvVmenqFwmUQVt6+nrylwEbl87VijHZN1AiBhPSIIEyTcMg6gI0elBKq3ZcHp0DVh44refVMKRyCsyw=="}]},"_npmUser":{"name":"amxx","email":"hadrien.croubois@gmail.com"},"directories":{},"maintainers":[{"name":"elopio","email":"yo@elopio.net"},{"name":"frangio","email":"frangio.1@gmail.com"},{"name":"spalladino","email":"spalladino@gmail.com"},{"name":"amxx","email":"hadrien.croubois@gmail.com"}],"_npmOperationalInternal":{"host":"s3://npm-registry-packages","tmp":"tmp/openzeppelin-solidity_4.0.0-rc.0_1615300964971_0.3854209323471416"},"_hasShrinkwrap":false},"4.0.0":{"name":"openzeppelin-solidity","description":"Secure Smart Contract library for Solidity","version":"4.0.0","bin":{"openzeppelin-contracts-migrate-imports":"scripts/migrate-imports.js"},"scripts":{"compile":"hardhat compile","coverage":"hardhat coverage","docs":"oz-docs","docs:watch":"npm run docs watch contracts 'docs/*.hbs'","prepare-docs":"scripts/prepare-docs.sh","lint":"npm run lint:js && npm run lint:sol","lint:fix":"npm run lint:js:fix","lint:js":"eslint --ignore-path .gitignore .","lint:js:fix":"eslint --ignore-path .gitignore . --fix","lint:sol":"echo 'solidity linter currently disabled' # 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The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"ad90dbdaff982ecd557b1a16284d1df6f3f5a8a9","_id":"openzeppelin-solidity@4.1.0-rc.0","_nodeVersion":"14.15.3","_npmVersion":"7.10.0","dist":{"integrity":"sha512-aOvqb5U6DUgLwTHktHcAiiEpxsBqodMwUUWfbG5sc3P3VJqY/TEh7bNWxmh7Wfpm3n6oJZMSH5usc13Nxvkj6g==","shasum":"a8aee9ca1dca8276801b9438c37187123b1e5c85","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-4.1.0-rc.0.tgz","fileCount":190,"unpackedSize":1039731,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.13\r\nComment: https://openpgpjs.org\r\n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\n8ZnU\r\n=S6GT\r\n-----END PGP SIGNATURE-----\r\n","signatures":[{"keyid":"SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA","sig":"MEQCIDt2oxA1eaWuQgFmzB3fa3G31olsMa1Nl/vEkEmp/F7mAiAxLbZ5RKhfRnP7o59Pnf/q/lIYTdZlsYPSeW0vVS+d1w=="}]},"_npmUser":{"name":"amxx","email":"hadrien.croubois@gmail.com"},"directories":{},"maintainers":[{"name":"elopio","email":"yo@elopio.net"},{"name":"frangio","email":"frangio.1@gmail.com"},{"name":"spalladino","email":"spalladino@gmail.com"},{"name":"amxx","email":"hadrien.croubois@gmail.com"}],"_npmOperationalInternal":{"host":"s3://npm-registry-packages","tmp":"tmp/openzeppelin-solidity_4.1.0-rc.0_1618589753630_0.646441235848958"},"_hasShrinkwrap":false,"deprecated":"This package is now published as @openzeppelin/contracts. 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The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\n## Contribute\n\nOpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"556e366ce52358f1a4d51066ea7dd3694552f2af","_id":"openzeppelin-solidity@4.2.0-rc.0","_nodeVersion":"14.17.0","_npmVersion":"7.16.0","dist":{"integrity":"sha512-zWa6I9Uny30Uky5jqgveSvVGdpx3NE0jWtxYKgytjOD32jNpQyQYJeM3CXkX68r89omD02kyrq/YlsJtwW4Mcg==","shasum":"fe35b252f6693783c406d0051616997ea8705c2a","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-4.2.0-rc.0.tgz","fileCount":197,"unpackedSize":1069907,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.13\r\nComment: https://openpgpjs.org\r\n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\nCYud\r\n=C8M8\r\n-----END PGP SIGNATURE-----\r\n","signatures":[{"keyid":"SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA","sig":"MEUCIGFcN+kPgDEohaWPglzzatqDq6otBY/U9ZkkIoJHmfJZAiEAou6fNouATaZxHtmtqGUcOgMJGXW/r+o6CT0kxZgIgQ0="}]},"_npmUser":{"name":"frangio","email":"frangio.1@gmail.com"},"directories":{},"maintainers":[{"name":"elopio","email":"yo@elopio.net"},{"name":"frangio","email":"frangio.1@gmail.com"},{"name":"spalladino","email":"spalladino@gmail.com"},{"name":"amxx","email":"hadrien.croubois@gmail.com"}],"_npmOperationalInternal":{"host":"s3://npm-registry-packages","tmp":"tmp/openzeppelin-solidity_4.2.0-rc.0_1624452893586_0.07015465225095663"},"_hasShrinkwrap":false,"deprecated":"This package is now published as @openzeppelin/contracts. 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The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin Contracts is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin Contracts is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\nCritical bug fixes will be backported to past major releases.\n\n## Contribute\n\nOpenZeppelin Contracts exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin Contracts is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"635e36ff08f4e89ef17d2239196dfa617af0c98e","_id":"openzeppelin-solidity@4.3.0-rc.0","_nodeVersion":"14.15.3","_npmVersion":"7.10.0","dist":{"integrity":"sha512-sFhJnHcsWUYrMbfJypkRofd/gHsPSLWyWSpbgJeDKktUQDLMeVvyh83DHFTBwIS4jDGmkGVaZUCeBc4xh3d6ew==","shasum":"f532d36309eeab5e5329d1facb4714145160ba09","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-4.3.0-rc.0.tgz","fileCount":254,"unpackedSize":2490875,"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.13\r\nComment: https://openpgpjs.org\r\n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\n33/j\r\n=5zkU\r\n-----END PGP SIGNATURE-----\r\n","signatures":[{"keyid":"SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA","sig":"MEYCIQCsslPnWV5WU0p5Gkb4RIRZjwaqfstJu3bSih5hpsgligIhAOqnlchqhZE1Kmybtn8ymGzh7bNbSOb33sUWElgoA2XW"}]},"_npmUser":{"name":"amxx","email":"hadrien.croubois@gmail.com"},"directories":{},"maintainers":[{"name":"frangio","email":"frangio.1@gmail.com"},{"name":"spalladino","email":"spalladino@gmail.com"},{"name":"amxx","email":"hadrien.croubois@gmail.com"}],"_npmOperationalInternal":{"host":"s3://npm-registry-packages","tmp":"tmp/openzeppelin-solidity_4.3.0-rc.0_1628258983737_0.46340124824457507"},"_hasShrinkwrap":false,"deprecated":"This package is now published as @openzeppelin/contracts. 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The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin Contracts is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin Contracts is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\nCritical bug fixes will be backported to past major releases.\n\n## Contribute\n\nOpenZeppelin Contracts exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin Contracts is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"0a87a4e75b02b95ca019d4894dc6e02e69e586f1","_id":"openzeppelin-solidity@4.4.0-rc.0","_nodeVersion":"17.0.0","_npmVersion":"8.1.0","dist":{"integrity":"sha512-Swztpj7AQjtMp+9dOrPZbmsEBNS5qBBNqPIv3risDze/wUBJ9GduYKtR5mRwLX1pn7vG7pc7BtYKi39SeWAsCQ==","shasum":"2ff01ea7128122c9d1ac3c815108dbb2a34af2f2","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-4.4.0-rc.0.tgz","fileCount":138,"unpackedSize":428964,"signatures":[{"keyid":"SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA","sig":"MEYCIQCEii/Qugv+MBpxWONlplhiSWN8ibwnaK2Jqddohfm11QIhAKdFc4mMprgDXP9+8BBOqGX0dJftPcAkx2+DL3BmJ5Yz"}]},"_npmUser":{"name":"frangio","email":"frangio.1@gmail.com"},"directories":{},"maintainers":[{"name":"frangio","email":"frangio.1@gmail.com"},{"name":"spalladino","email":"spalladino@gmail.com"},{"name":"amxx","email":"hadrien.croubois@gmail.com"}],"_npmOperationalInternal":{"host":"s3://npm-registry-packages","tmp":"tmp/openzeppelin-solidity_4.4.0-rc.0_1634761305683_0.8414927906195626"},"_hasShrinkwrap":false,"deprecated":"This package is now published as @openzeppelin/contracts. 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The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin Contracts is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin Contracts is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nPlease report any security issues you find to security@openzeppelin.org.\n\nCritical bug fixes will be backported to past major releases.\n\n## Contribute\n\nOpenZeppelin Contracts exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin Contracts is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"8d7a871609117b2d95074f5f5e92e4c0506584b7","_id":"openzeppelin-solidity@4.3.3","_nodeVersion":"16.12.0","_npmVersion":"8.1.0","dist":{"integrity":"sha512-/nGPWd19KwX8vfxG0kZLqVDxBtMzcjiN+/6/dfSPaUw2RfRalqAZ/x/Gu8n/dtOcvVf5cQQOodeIgrdwPI+eKw==","shasum":"551ff45d300279fbd788546164a7af67d803139b","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-4.3.3.tgz","fileCount":253,"unpackedSize":1329926,"signatures":[{"keyid":"SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA","sig":"MEYCIQDVBsv3NRWB6hc+FDSlGR+pE/B8SHrzYzXeNCHSvKzLSgIhAK5ZEbFZes2Uo8zRhycZeRIsvtAPmXWVl9bemaPzH8JS"}]},"_npmUser":{"name":"frangio","email":"frangio.1@gmail.com"},"directories":{},"maintainers":[{"name":"frangio","email":"frangio.1@gmail.com"},{"name":"spalladino","email":"spalladino@gmail.com"},{"name":"amxx","email":"hadrien.croubois@gmail.com"}],"_npmOperationalInternal":{"host":"s3://npm-registry-packages","tmp":"tmp/openzeppelin-solidity_4.3.3_1636751077209_0.8955958529326755"},"_hasShrinkwrap":false,"deprecated":"This package is now published as @openzeppelin/contracts. 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When doing this, make sure to specify the tag for a release such as `v4.5.0`, instead of using the `master` branch.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721.sol\";\n\ncontract MyCollectible is ERC721 {\n constructor() ERC721(\"MyCollectible\", \"MCO\") {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources, nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [docs site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools, including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices.. The following articles provide great background reading, though please note, some of the referenced tools have changed as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin Contracts is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin Contracts is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nWe have a [**bug bounty program** on Immunefi](https://www.immunefi.com/bounty/openzeppelin). Please report any security issues you find through the Immunefi dashboard, or reach out to security@openzeppelin.com.\n\nCritical bug fixes will be backported to past major releases.\n\n## Contribute\n\nOpenZeppelin Contracts exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin Contracts is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md","gitHead":"3a2534d66b709ed5f4f9351110bdb6344e17f6af","_id":"openzeppelin-solidity@4.6.0-rc.0","_nodeVersion":"16.14.0","_npmVersion":"8.3.1","dist":{"integrity":"sha512-S4d8KmrzxZ0Z+p6I/ydDimAV92teudA1ItuyVLy2KzDUujHKR1jJpa1TKkRd+msx89sU+L2F0uq9+0ANW6ilpg==","shasum":"6b36cfd239c79c7c4f9ffe5b36175aa1970d59e9","tarball":"https://registry.npmjs.org/openzeppelin-solidity/-/openzeppelin-solidity-4.6.0-rc.0.tgz","fileCount":171,"unpackedSize":531223,"signatures":[{"keyid":"SHA256:jl3bwswu80PjjokCgh0o2w5c2U4LhQAE57gj9cz1kzA","sig":"MEQCIGjPkR7kJazSErz06Rfdu29w+F1fZVONwVqvp8X2QCUiAiAQZQbomh9qx5hJI3uNYIQegfyAY8Cca3WV2M0johLwXg=="}],"npm-signature":"-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v4.10.10\r\nComment: https://openpgpjs.org\r\n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\r\n6A8qywaM1C8u2PvI8cZFulce4QMEN21+l70=\r\n=icdZ\r\n-----END PGP SIGNATURE-----\r\n"},"_npmUser":{"name":"frangio","email":"frangio.1@gmail.com"},"directories":{},"maintainers":[{"name":"frangio","email":"frangio.1@gmail.com"},{"name":"spalladino","email":"spalladino@gmail.com"},{"name":"amxx","email":"hadrien.croubois@gmail.com"}],"_npmOperationalInternal":{"host":"s3://npm-registry-packages","tmp":"tmp/openzeppelin-solidity_4.6.0-rc.0_1648690274458_0.4313135096421441"},"_hasShrinkwrap":false,"deprecated":"This package is now published as @openzeppelin/contracts. 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Smart Contract library for Solidity","homepage":"https://openzeppelin.com/contracts/","keywords":["solidity","ethereum","smart","contracts","security","zeppelin"],"repository":{"type":"git","url":"git+https://github.com/OpenZeppelin/openzeppelin-contracts.git"},"author":{"name":"OpenZeppelin Community","email":"maintainers@openzeppelin.org"},"bugs":{"url":"https://github.com/OpenZeppelin/openzeppelin-contracts/issues"},"license":"MIT","readme":"# \n\n[](https://docs.openzeppelin.com/contracts)\n[](https://www.npmjs.org/package/@openzeppelin/contracts)\n[](https://codecov.io/gh/OpenZeppelin/openzeppelin-contracts)\n[](https://www.gitpoap.io/gh/OpenZeppelin/openzeppelin-contracts)\n\n**A library for secure smart contract development.** Build on a solid foundation of community-vetted code.\n\n * Implementations of standards like [ERC20](https://docs.openzeppelin.com/contracts/erc20) and [ERC721](https://docs.openzeppelin.com/contracts/erc721).\n * Flexible [role-based permissioning](https://docs.openzeppelin.com/contracts/access-control) scheme.\n * Reusable [Solidity components](https://docs.openzeppelin.com/contracts/utilities) to build custom contracts and complex decentralized systems.\n\n:mage: **Not sure how to get started?** Check out [Contracts Wizard](https://wizard.openzeppelin.com/) — an interactive smart contract generator.\n\n:building_construction: **Want to scale your decentralized application?** Check out [OpenZeppelin Defender](https://openzeppelin.com/defender) — a secure platform for automating and monitoring your operations.\n\n## Overview\n\n### Installation\n\n```console\n$ npm install @openzeppelin/contracts\n```\n\nOpenZeppelin Contracts features a [stable API](https://docs.openzeppelin.com/contracts/releases-stability#api-stability), which means that your contracts won't break unexpectedly when upgrading to a newer minor version.\n\nAn alternative to npm is to use the GitHub repository (`openzeppelin/openzeppelin-contracts`) to retrieve the contracts. When doing this, make sure to specify the tag for a release such as `v4.5.0`, instead of using the `master` branch.\n\n### Usage\n\nOnce installed, you can use the contracts in the library by importing them:\n\n```solidity\npragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/ERC721.sol\";\n\ncontract MyCollectible is ERC721 {\n constructor() ERC721(\"MyCollectible\", \"MCO\") {\n }\n}\n```\n\n_If you're new to smart contract development, head to [Developing Smart Contracts](https://docs.openzeppelin.com/learn/developing-smart-contracts) to learn about creating a new project and compiling your contracts._\n\nTo keep your system secure, you should **always** use the installed code as-is, and neither copy-paste it from online sources nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly increasing gas costs.\n\n## Learn More\n\nThe guides in the [documentation site](https://docs.openzeppelin.com/contracts) will teach about different concepts, and how to use the related contracts that OpenZeppelin Contracts provides:\n\n* [Access Control](https://docs.openzeppelin.com/contracts/access-control): decide who can perform each of the actions on your system.\n* [Tokens](https://docs.openzeppelin.com/contracts/tokens): create tradeable assets or collectives, and distribute them via [Crowdsales](https://docs.openzeppelin.com/contracts/crowdsales).\n* [Gas Station Network](https://docs.openzeppelin.com/contracts/gsn): let your users interact with your contracts without having to pay for gas themselves.\n* [Utilities](https://docs.openzeppelin.com/contracts/utilities): generic useful tools including non-overflowing math, signature verification, and trustless paying systems.\n\nThe [full API](https://docs.openzeppelin.com/contracts/api/token/ERC20) is also thoroughly documented, and serves as a great reference when developing your smart contract application. You can also ask for help or follow Contracts's development in the [community forum](https://forum.openzeppelin.com).\n\nFinally, you may want to take a look at the [guides on our blog](https://blog.openzeppelin.com/guides), which cover several common use cases and good practices. The following articles provide great background reading, though please note that some of the referenced tools have changed, as the tooling in the ecosystem continues to rapidly evolve.\n\n* [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.\n* [A Gentle Introduction to Ethereum Programming, Part 1](https://blog.openzeppelin.com/a-gentle-introduction-to-ethereum-programming-part-1-783cc7796094) provides very useful information on an introductory level, including many basic concepts from the Ethereum platform.\n* For a more in-depth dive, you may read the guide [Designing the Architecture for Your Ethereum Application](https://blog.openzeppelin.com/designing-the-architecture-for-your-ethereum-application-9cec086f8317), which discusses how to better structure your application and its relationship to the real world.\n\n## Security\n\nThis project is maintained by [OpenZeppelin](https://openzeppelin.com), and developed following our high standards for code quality and security. OpenZeppelin Contracts is meant to provide tested and community-audited code, but please use common sense when doing anything that deals with real money! We take no responsibility for your implementation decisions and any security problems you might experience.\n\nThe core development principles and strategies that OpenZeppelin Contracts is based on include: security in depth, simple and modular code, clarity-driven naming conventions, comprehensive unit testing, pre-and-post-condition sanity checks, code consistency, and regular audits.\n\nThe latest audit was done on October 2018 on version 2.0.0.\n\nWe have a [**bug bounty program** on Immunefi](https://www.immunefi.com/bounty/openzeppelin). Please report any security issues you find through the Immunefi dashboard, or reach out to security@openzeppelin.com.\n\nCritical bug fixes will be backported to past major releases.\n\n## Contribute\n\nOpenZeppelin Contracts exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide](CONTRIBUTING.md)!\n\n## License\n\nOpenZeppelin Contracts is released under the [MIT License](LICENSE).\n","readmeFilename":"README.md"}