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openzeppelin-contracts-upgradeable
Unverified Commit 3df0a786 by Nicolás Venturo Committed by GitHub
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Merge pull request #18 from OpenZeppelin/release-v2.0.0 

Merge OpenZeppelin 2.0 with initializer functions
parents 94a7abce 3c4528b8
Showing with 2227 additions and 284 deletions
.babelrc deleted 100644 → 0
{
"presets": ["es2015", "stage-2", "stage-3"]
}
.editorconfig 0 → 100644
# EditorConfig is awesome: https://EditorConfig.org
# top-most EditorConfig file
root = true
[*]
charset = utf-8
end_of_line = lf
indent_size = 2
indent_style = space
insert_final_newline = true
trim_trailing_whitespace = true
.eslintrc
......@@ -21,31 +21,35 @@
"rules": {
// Strict mode
"strict": [2, "global"],
"strict": ["error", "global"],
// Code style
"indent": [2, 2],
"quotes": [2, "single"],
"camelcase": ["error", {"properties": "always"}],
"comma-dangle": ["warn", "always-multiline"],
"comma-spacing": ["error", {"before": false, "after": true}],
"dot-notation": ["error", {"allowKeywords": true, "allowPattern": ""}],
"eol-last": ["error", "always"],
"eqeqeq": ["error", "smart"],
"generator-star-spacing": ["error", "before"],
"indent": ["error", 2],
"linebreak-style": ["error", "unix"],
"max-len": ["error", 120, 2],
"no-debugger": "off",
"no-dupe-args": "error",
"no-dupe-keys": "error",
"no-mixed-spaces-and-tabs": ["error", "smart-tabs"],
"no-redeclare": ["error", {"builtinGlobals": true}],
"no-trailing-spaces": ["error", { "skipBlankLines": false }],
"no-undef": "error",
"no-use-before-define": "off",
"no-var": "error",
"object-curly-spacing": ["error", "always"],
"prefer-const": "error",
"quotes": ["error", "single"],
"semi": ["error", "always"],
"space-before-function-paren": ["error", "always"],
"no-use-before-define": 0,
"eqeqeq": [2, "smart"],
"dot-notation": [2, {"allowKeywords": true, "allowPattern": ""}],
"no-redeclare": [2, {"builtinGlobals": true}],
"no-trailing-spaces": [2, { "skipBlankLines": true }],
"eol-last": 1,
"comma-spacing": [2, {"before": false, "after": true}],
"camelcase": [2, {"properties": "always"}],
"no-mixed-spaces-and-tabs": [2, "smart-tabs"],
"comma-dangle": [1, "always-multiline"],
"no-dupe-args": 2,
"no-dupe-keys": 2,
"no-debugger": 0,
"no-undef": 2,
"object-curly-spacing": [2, "always"],
"max-len": [2, 120, 2],
"generator-star-spacing": ["error", "before"],
"promise/avoid-new": 0,
"promise/always-return": 0
"promise/always-return": "off",
"promise/avoid-new": "off",
}
}
.gitignore
......@@ -34,3 +34,6 @@ build/
# lol macs
.DS_Store/
# truffle
.node-xmlhttprequest-*
.jshintrc deleted 100644 → 0
{
"bitwise": false, // Prohibit bitwise operators (&, |, ^, etc.).
"browser": true, // Standard browser globals e.g. `window`, `document`.
"camelcase": false, // Permit only camelcase for `var` and `object indexes`.
"curly": true, // Require {} for every new block or scope.
"devel": false, // Allow development statements e.g. `console.log();`.
"eqeqeq": true, // Require triple equals i.e. `===`.
"esnext": true, // Allow ES.next specific features such as `const` and `let`.
"freeze": true, // Forbid overwriting prototypes of native objects such as Array, Date and so on.
"immed": true, // Require immediate invocations to be wrapped in parens e.g. `( function(){}() );`
"indent": 2, // Specify indentation spacing
"latedef": true, // Prohibit variable use before definition.
"newcap": false, // Require capitalization of all constructor functions e.g. `new F()`.
"noarg": true, // Prohibit use of `arguments.caller` and `arguments.callee`.
"node": true, // Enable globals available when code is running inside of the NodeJS runtime environment.
"noempty": true, // Prohibit use of empty blocks.
"nonew": true, // Prohibits the use of constructor functions for side-effects
"quotmark": "single", // Define quotes to string values.
"regexp": true, // Prohibit `.` and `[^...]` in regular expressions.
"smarttabs": false, // Supress warnings about mixed tabs and spaces
"strict": true, // Require `use strict` pragma in every file.
"trailing": true, // Prohibit trailing whitespaces.
"undef": true, // Require all non-global variables be declared before they are used.
"unused": true, // Warn unused variables.
"maxparams": 4, // Maximum number of parameters for a function
"maxstatements": 15, // Maximum number of statements in a function
"maxcomplexity": 10, // Cyclomatic complexity (http://en.wikipedia.org/wiki/Cyclomatic_complexity)
"maxdepth": 4, // Maximum depth of nested control structures
"maxlen": 120, // Maximum number of cols in a line
"multistr": true, // Allow use of multiline EOL escaping
"experimental": ["asyncawait", "asyncreqawait"],
"predef": [ // Extra globals.
"after",
"afterEach",
"before",
"beforeEach",
"define",
"describe",
"exports",
"it",
"web3",
"artifacts",
"contract",
"assert"
]
}
.soliumrc.json
......@@ -2,10 +2,17 @@
"extends": "solium:all",
"plugins": ["security"],
"rules": {
"quotes": ["error", "double"],
"no-empty-blocks": "off",
"error-reason": "off",
"indentation": ["error", 2],
"arg-overflow": ["warning", 3],
"lbrace": "off",
"linebreak-style": ["error", "unix"],
"max-len": ["error", 120],
"no-constant": ["error"],
"no-empty-blocks": "off",
"quotes": ["error", "double"],
"uppercase": "off",
"visibility-first": "error",
"security/enforce-explicit-visibility": ["error"],
"security/no-block-members": ["warning"],
"security/no-inline-assembly": ["warning"]
......
.travis.yml
dist: trusty
sudo: required
sudo: false
group: beta
language: node_js
node_js:
- "8"
cache:
directories:
- node_modules
env:
-
- SOLIDITY_COVERAGE=true
- SOLC_NIGHTLY=true
matrix:
jobs:
# XXX fast_finish doesn't work with stages yet. See
# https://github.com/travis-ci/travis-ci/issues/8425
# --elopio - 20180531
fast_finish: true
allow_failures:
- env: SOLIDITY_COVERAGE=true
- env: SOLC_NIGHTLY=true
before_script:
- truffle version
script:
- npm run lint
- npm run lint:sol
- npm run test
include:
# Run the unit test suite three times in parallel.
# The first one gets results faster and is the only one required to pass.
# The second one generates the coverage report.
# The third one is to keep us informed about possible issues with the
# upcoming solidity release.
- stage: tests
name: "unit tests"
script: npm run test
- stage: tests
name: "unit tests with coverage"
script: npm run test
env: SOLIDITY_COVERAGE=true
- stage: tests
name: "unit tests with solc nightly"
script: npm run test
env: SOLC_NIGHTLY=true
# solidity and javascript style tests.
- stage: tests
name: "static tests"
script: npm run lint
- stage: update docs
if: tag =~ ^v[0-9]+\.[0-9]+\.[0-9]+$
addons:
apt:
packages:
- curl
script:
- ./scripts/ci/trigger_docs_update "${TRAVIS_TAG}"
notifications:
slack:
rooms:
......
CODE_OF_CONDUCT.md 0 → 100644
# Contributor Covenant Code of Conduct
## Our Pledge
In the interest of fostering an open and welcoming environment, we as
contributors and maintainers pledge to making participation in our project and
our community a harassment-free experience for everyone, regardless of age, body
size, disability, ethnicity, sex characteristics, gender identity and expression,
level of experience, education, socio-economic status, nationality, personal
appearance, race, religion, or sexual identity and orientation.
## Our Standards
Examples of behavior that contributes to creating a positive environment
include:
* Using welcoming and inclusive language
* Being respectful of differing viewpoints and experiences
* Gracefully accepting constructive criticism
* Focusing on what is best for the community
* Showing empathy towards other community members
Examples of unacceptable behavior by participants include:
* The use of sexualized language or imagery and unwelcome sexual attention or
advances
* Trolling, insulting/derogatory comments, and personal or political attacks
* Public or private harassment
* Publishing others' private information, such as a physical or electronic
address, without explicit permission
* Other conduct which could reasonably be considered inappropriate in a
professional setting
## Our Responsibilities
Project maintainers are responsible for clarifying the standards of acceptable
behavior and are expected to take appropriate and fair corrective action in
response to any instances of unacceptable behavior.
Project maintainers have the right and responsibility to remove, edit, or
reject comments, commits, code, wiki edits, issues, and other contributions
that are not aligned to this Code of Conduct, or to ban temporarily or
permanently any contributor for other behaviors that they deem inappropriate,
threatening, offensive, or harmful.
## Scope
This Code of Conduct applies both within project spaces and in public spaces
when an individual is representing the project or its community. Examples of
representing a project or community include using an official project e-mail
address, posting via an official social media account, or acting as an appointed
representative at an online or offline event. Representation of a project may be
further defined and clarified by project maintainers.
## Enforcement
Instances of abusive, harassing, or otherwise unacceptable behavior may be
reported by contacting the project team at maintainers@openzeppelin.org. All
complaints will be reviewed and investigated and will result in a response that
is deemed necessary and appropriate to the circumstances. The project team is
obligated to maintain confidentiality with regard to the reporter of an incident.
Further details of specific enforcement policies may be posted separately.
Project maintainers who do not follow or enforce the Code of Conduct in good
faith may face temporary or permanent repercussions as determined by other
members of the project's leadership.
## Attribution
This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
[homepage]: https://www.contributor-covenant.org
CODE_STYLE.md 0 → 100644
# Code Style
We value clean code and consistency, and those are prerequisites for us to
include new code in the repository. Before proposing a change, please read this
document and take some time to familiarize yourself with the style of the
existing codebase.
## Solidity code
In order to be consistent with all the other Solidity projects, we follow the
[official recommendations documented in the Solidity style guide](http://solidity.readthedocs.io/en/latest/style-guide.html).
Any exception or additions specific to our project are documented below.
### Naming
* Try to avoid acronyms and abbreviations.
* Private state variables should have an underscore prefix.
```
contract TestContract {
uint256 private _privateVar;
}
```
* Parameters must not be prefixed with an underscore.
```
function test(uint256 testParameter1, uint256 testParameter2) {
...
}
```
* Internal and private functions should have an underscore prefix.
```
function _testInternal() internal {
...
}
```
```
function _testPrivate() private {
...
}
```
* Events should be emitted immediately after the state change that they
represent, and consequently they should be named in past tense.
```
function _burn(address _who, uint256 _value) internal {
super._burn(_who, _value);
emit TokensBurned(_who, _value);
}
```
Some standards (e.g. ERC20) use present tense, and in those cases the
standard specification prevails.
CONTRIBUTING.md
......@@ -20,13 +20,13 @@ As a contributor, you are expected to fork this repository, work on your own for
```
cd openzeppelin-solidity
git remote add upstream https://github.com/OpenZeppelin/openzeppelin-solidity.git
git fetch upstream
git checkout development
git pull --rebase upstream development
git pull --rebase upstream master
```
NOTE: The directory `openzeppelin-solidity` represents your fork's local copy.
2) Branch out from `development` into `fix/some-bug-#123`:
2) Branch out from `master` into `fix/some-bug-#123`:
(Postfixing #123 will associate your PR with the issue #123 and make everyone's life easier =D)
```
git checkout -b fix/some-bug-#123
......
README.md
# OpenZeppelin for ZeppelinOS
[![NPM Package](https://img.shields.io/npm/v/openzeppelin-zos.svg?style=flat-square)](https://www.npmjs.org/package/openzeppelin-zos)
[![Build Status](https://img.shields.io/travis/OpenZeppelin/openzeppelin-zos.svg?branch=master&style=flat-square)](https://travis-ci.org/OpenZeppelin/openzeppelin-zos)
[![Coverage Status](https://img.shields.io/coveralls/github/OpenZeppelin/openzeppelin-zos/master.svg?style=flat-square)](https://coveralls.io/github/OpenZeppelin/openzeppelin-zos?branch=master)
# <img src="logo.png" alt="OpenZeppelin" width="400px">
OpenZeppelin is a Solidity library of secure smart contract components for Ethereum.
[![NPM Package](https://img.shields.io/npm/v/openzeppelin-solidity.svg?style=flat-square)](https://www.npmjs.org/package/openzeppelin-solidity)
[![Build Status](https://img.shields.io/travis/OpenZeppelin/openzeppelin-solidity.svg?branch=master&style=flat-square)](https://travis-ci.org/OpenZeppelin/openzeppelin-solidity)
[![Coverage Status](https://img.shields.io/coveralls/github/OpenZeppelin/openzeppelin-solidity/master.svg?style=flat-square)](https://coveralls.io/github/OpenZeppelin/openzeppelin-solidity?branch=master)
This repository is a fork with the modifications necessary to be used as the ZeppelinOS stdlib.
**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.
To learn more about using OpenZeppelin in ZeppelinOS, make sure to read [*Using the stdlib in your app*](https://docs.zeppelinos.org/docs/using.html) and the rest of the docs!
## Install
```
npm install openzeppelin-solidity
```
## Usage
To write your custom contracts, import ours and extend them through inheritance.
```solidity
import 'openzeppelin-solidity/contracts/token/ERC721/ERC721.sol';
import 'openzeppelin-solidity/contracts/token/ERC721/ERC721Mintable.sol';
contract MyNFT is ERC721, ERC721Mintable {
}
```
> You need an ethereum development framework for the above import statements to work! Check out these guides for [Truffle] or [Embark].
On 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].
## Security
OpenZeppelin 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.
The 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.
Please report any security issues you find to security@openzeppelin.org.
## Contribute
OpenZeppelin exists thanks to its contributors. There are many ways you can participate and help build high quality software. Check out the [contribution guide]!
## License
Code released under the [MIT License](/LICENSE).
OpenZeppelin is released under the [MIT License](LICENSE).
[API docs]: https://openzeppelin.org/api/docs/token_ERC721_ERC721BasicToken.html
[guides]: https://openzeppelin.org/api/docs/get-started.html
[Slack]: https://slack.openzeppelin.org
[Zeppelin]: https://zeppelin.solutions
[contribution guide]: CONTRIBUTING.md
[Truffle]: https://truffleframework.com/docs/truffle/quickstart
[Embark]: https://embark.status.im/docs/quick_start.html
RELEASING.md 0 → 100644
# Releasing
This document describes our release process, and contains the steps to be followed by an OpenZeppelin maintainer at the several stages of a release.
We release a new version of OpenZeppelin monthly. Release cycles are tracked in the [issue milestones](https://github.com/OpenZeppelin/openzeppelin-solidity/milestones).
Each release has at least one release candidate published first, intended for community review and any critical fixes that may come out of it. At the moment we leave 1 week between the first release candidate and the final release.
Before starting make sure to verify the following items.
* Your local `master` branch is in sync with your `upstream` remote (it may have another name depending on your setup).
* Your repo is clean, particularly with no untracked files in the contracts and tests directories. Verify with `git clean -n`.
## Creating the release branch
We'll refer to a release `vX.Y.Z`.
```
git checkout master
git checkout -b release-vX.Y.Z
```
## Creating a release candidate
Once in the release branch, change the version string in `package.json`, `package-lock.json` and `ethpm.json` to `X.Y.Z-rc.R`. (This will be `X.Y.Z-rc.1` for the first release candidate.) Commit these changes and tag the commit as `vX.Y.Z-rc.R`.
```
git add package.json package-lock.json ethpm.json
git commit -m "Release candidate vX.Y.Z-rc.R"
git tag -a vX.Y.Z-rc.R
git push upstream release-vX.Y.Z
git push upstream vX.Y.Z-rc.R
```
Draft the release notes in our [GitHub releases](https://github.com/OpenZeppelin/openzeppelin-solidity/releases). Make sure to mark it as a pre-release! Try to be consistent with our previous release notes in the title and format of the text. Release candidates don't need a detailed changelog, but make sure to include a link to GitHub's compare page.
Once the CI run for the new tag is green, publish on npm under the `next` tag.
```
npm publish --tag next
```
Publish the release notes on GitHub and ask our community manager to announce the release candidate on at least Slack and Twitter.
## Creating the final release
Make sure to have the latest changes from `upstream` in your local release branch.
```
git checkout release-vX.Y.Z
git pull upstream
```
Change the version string in `package.json`, `package-lock.json` and `ethpm.json` removing the "-rc.R" suffix. Commit these changes and tag the commit as `vX.Y.Z`.
```
git add package.json package-lock.json ethpm.json
git commit -m "Release vX.Y.Z"
git tag -a vX.Y.Z
git push upstream vX.Y.Z
```
Draft the release notes in GitHub releases. Try to be consistent with our previous release notes in the title and format of the text. Make sure to include a detailed changelog.
Once the CI run for the new tag is green, publish on npm.
```
npm publish
```
Publish the release notes on GitHub and ask our community manager to announce the release!
Delete the `next` tag in the npm package as there is no longer a release candidate.
```
npm dist-tag rm --otp $2FA_CODE openzeppelin-solidity next
```
## Merging the release branch
After the final release, the release branch should be merged back into `master`. This merge must not be squashed because it would lose the tagged release commit. Since the GitHub repo is set up to only allow squashed merges, the merge should be done locally and pushed.
Make sure to have the latest changes from `upstream` in your local release branch.
```
git checkout release-vX.Y.Z
git pull upstream
```
```
git checkout master
git merge --no-ff release-vX.Y.Z
git push upstream master
```
The release branch can then be deleted on GitHub.
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contracts/ARCHITECTURE.md 0 → 100644
## Architecture
The following provides visibility into how OpenZeppelin's contracts are organized:
- **access** - Smart contracts that enable functionality that can be used for selective restrictions and basic authorization control functions.
- **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.
- **distribution** - Includes extensions of the base crowdsale contract which can be used to customize the completion of a crowdsale.
- **emission** - Includes extensions of the base crowdsale contract which can be used to mint and manage how tokens are issued to purchasers.
- **price** - Includes extensions of the crowdsale contract that can be used to manage changes in token prices.
- **validation** - Includes extensions of the crowdsale contract that can be used to enforce restraints and limit access to token purchases.
- **examples** - A collection of simple smart contracts that demonstrate how to add new features to base contracts through multiple inheritance.
- **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.
- **lifecycle** - A collection of base contracts used to manage the existence and behavior of your contracts and their funds.
- **math** - Libraries with safety checks on operations that throw on errors.
- **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 applications.
- **ownership** - A collection of smart contracts that can be used to manage contract and token ownership
- **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.
- **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.
- **token** - A collection of approved ERC standard tokens -- their interfaces and implementations.
- **ERC20** - A standard interface for fungible tokens:
- *Interfaces* - Includes the ERC-20 token standard basic interface. I.e., what the contract’s ABI can represent.
- *Implementations* - Includes ERC-20 token implementations that include all required and some optional ERC-20 functionality.
- **ERC721** - A standard interface for non-fungible tokens
- *Interfaces* - Includes the ERC-721 token standard basic interface. I.e., what the contract’s ABI can represent.
- *Implementations* - Includes ERC-721 token implementations that include all required and some optional ERC-721 functionality.
contracts/Initializable.sol 0 → 100644
pragma solidity ^0.4.24;
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, because this is not dealt with automatically as
* with constructors.
*/
contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool wasInitializing = initializing;
initializing = true;
initialized = true;
_;
initializing = wasInitializing;
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
uint cs;
assembly { cs := extcodesize(address) }
return cs == 0;
}
}
contracts/MerkleProof.sol deleted 100644 → 0
pragma solidity ^0.4.21;
/*
* @title MerkleProof
* @dev Merkle proof verification
* @note Based on https://github.com/ameensol/merkle-tree-solidity/blob/master/src/MerkleProof.sol
*/
library MerkleProof {
/*
* @dev Verifies a Merkle proof proving the existence of a leaf in a Merkle tree. Assumes that each pair of leaves
* and each pair of pre-images is sorted.
* @param _proof Merkle proof containing sibling hashes on the branch from the leaf to the root of the Merkle tree
* @param _root Merkle root
* @param _leaf Leaf of Merkle tree
*/
function verifyProof(bytes32[] _proof, bytes32 _root, bytes32 _leaf) internal pure returns (bool) {
bytes32 computedHash = _leaf;
for (uint256 i = 0; i < _proof.length; i++) {
bytes32 proofElement = _proof[i];
if (computedHash < proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(computedHash, proofElement);
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(proofElement, computedHash);
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == _root;
}
}
contracts/ownership/rbac/Roles.sol → contracts/access/Roles.sol
pragma solidity ^0.4.21;
pragma solidity ^0.4.24;
/**
* @title Roles
* @author Francisco Giordano (@frangio)
* @dev Library for managing addresses assigned to a Role.
* See RBAC.sol for example usage.
*/
library Roles {
struct Role {
......@@ -13,43 +11,31 @@ library Roles {
}
/**
* @dev give an address access to this role
* @dev give an account access to this role
*/
function add(Role storage role, address addr)
internal
{
role.bearer[addr] = true;
function add(Role storage role, address account) internal {
require(account != address(0));
role.bearer[account] = true;
}
/**
* @dev remove an address' access to this role
* @dev remove an account's access to this role
*/
function remove(Role storage role, address addr)
internal
{
role.bearer[addr] = false;
function remove(Role storage role, address account) internal {
require(account != address(0));
role.bearer[account] = false;
}
/**
* @dev check if an address has this role
* // reverts
*/
function check(Role storage role, address addr)
view
internal
{
require(has(role, addr));
}
/**
* @dev check if an address has this role
* @dev check if an account has this role
* @return bool
*/
function has(Role storage role, address addr)
view
function has(Role storage role, address account)
internal
view
returns (bool)
{
return role.bearer[addr];
require(account != address(0));
return role.bearer[account];
}
}
contracts/access/SignatureBouncer.sol deleted 100644 → 0
pragma solidity ^0.4.18;
import "../ownership/Ownable.sol";
import "../ownership/rbac/RBAC.sol";
import "../ECRecovery.sol";
/**
* @title SignatureBouncer
* @author PhABC and Shrugs
* @dev Bouncer allows users to submit a signature as a permission to do an action.
* @dev If the signature is from one of the authorized bouncer addresses, the signature
* @dev is valid. The owner of the contract adds/removes bouncers.
* @dev Bouncer addresses can be individual servers signing grants or different
* @dev users within a decentralized club that have permission to invite other members.
* @dev
* @dev This technique is useful for whitelists and airdrops; instead of putting all
* @dev valid addresses on-chain, simply sign a grant of the form
* @dev keccak256(`:contractAddress` + `:granteeAddress`) using a valid bouncer address.
* @dev Then restrict access to your crowdsale/whitelist/airdrop using the
* @dev `onlyValidSignature` modifier (or implement your own using isValidSignature).
* @dev
* @dev See the tests Bouncer.test.js for specific usage examples.
*/
contract SignatureBouncer is Migratable, Ownable, RBAC {
using ECRecovery for bytes32;
string public constant ROLE_BOUNCER = "bouncer";
function initialize(address _sender)
isInitializer("SignatureBouncer", "1.9.0")
public
{
Ownable.initialize(_sender);
}
/**
* @dev requires that a valid signature of a bouncer was provided
*/
modifier onlyValidSignature(bytes _sig)
{
require(isValidSignature(msg.sender, _sig));
_;
}
/**
* @dev allows the owner to add additional bouncer addresses
*/
function addBouncer(address _bouncer)
onlyOwner
public
{
require(_bouncer != address(0));
addRole(_bouncer, ROLE_BOUNCER);
}
/**
* @dev allows the owner to remove bouncer addresses
*/
function removeBouncer(address _bouncer)
onlyOwner
public
{
require(_bouncer != address(0));
removeRole(_bouncer, ROLE_BOUNCER);
}
/**
* @dev is the signature of `this + sender` from a bouncer?
* @return bool
*/
function isValidSignature(address _address, bytes _sig)
internal
view
returns (bool)
{
return isValidDataHash(
keccak256(address(this), _address),
_sig
);
}
/**
* @dev internal function to convert a hash to an eth signed message
* @dev and then recover the signature and check it against the bouncer role
* @return bool
*/
function isValidDataHash(bytes32 hash, bytes _sig)
internal
view
returns (bool)
{
address signer = hash
.toEthSignedMessageHash()
.recover(_sig);
return hasRole(signer, ROLE_BOUNCER);
}
}
contracts/access/roles/CapperRole.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../Roles.sol";
contract CapperRole is Initializable {
using Roles for Roles.Role;
event CapperAdded(address indexed account);
event CapperRemoved(address indexed account);
Roles.Role private cappers;
function initialize() public initializer {
if (!isCapper(msg.sender)) {
_addCapper(msg.sender);
}
}
modifier onlyCapper() {
require(isCapper(msg.sender));
_;
}
function isCapper(address account) public view returns (bool) {
return cappers.has(account);
}
function addCapper(address account) public onlyCapper {
_addCapper(account);
}
function renounceCapper() public {
_removeCapper(msg.sender);
}
function _addCapper(address account) internal {
cappers.add(account);
emit CapperAdded(account);
}
function _removeCapper(address account) internal {
cappers.remove(account);
emit CapperRemoved(account);
}
}
contracts/access/roles/MinterRole.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../Roles.sol";
contract MinterRole is Initializable {
using Roles for Roles.Role;
event MinterAdded(address indexed account);
event MinterRemoved(address indexed account);
Roles.Role private minters;
function initialize() public initializer {
if (!isMinter(msg.sender)) {
_addMinter(msg.sender);
}
}
modifier onlyMinter() {
require(isMinter(msg.sender));
_;
}
function isMinter(address account) public view returns (bool) {
return minters.has(account);
}
function addMinter(address account) public onlyMinter {
_addMinter(account);
}
function renounceMinter() public {
_removeMinter(msg.sender);
}
function _addMinter(address account) internal {
minters.add(account);
emit MinterAdded(account);
}
function _removeMinter(address account) internal {
minters.remove(account);
emit MinterRemoved(account);
}
}
contracts/access/roles/PauserRole.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../Roles.sol";
contract PauserRole is Initializable {
using Roles for Roles.Role;
event PauserAdded(address indexed account);
event PauserRemoved(address indexed account);
Roles.Role private pausers;
function initialize() public initializer {
if (!isPauser(msg.sender)) {
_addPauser(msg.sender);
}
}
modifier onlyPauser() {
require(isPauser(msg.sender));
_;
}
function isPauser(address account) public view returns (bool) {
return pausers.has(account);
}
function addPauser(address account) public onlyPauser {
_addPauser(account);
}
function renouncePauser() public {
_removePauser(msg.sender);
}
function _addPauser(address account) internal {
pausers.add(account);
emit PauserAdded(account);
}
function _removePauser(address account) internal {
pausers.remove(account);
emit PauserRemoved(account);
}
}
contracts/access/roles/SignerRole.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../Roles.sol";
contract SignerRole is Initializable {
using Roles for Roles.Role;
event SignerAdded(address indexed account);
event SignerRemoved(address indexed account);
Roles.Role private signers;
function initialize() public initializer {
if (!isSigner(msg.sender)) {
_addSigner(msg.sender);
}
}
modifier onlySigner() {
require(isSigner(msg.sender));
_;
}
function isSigner(address account) public view returns (bool) {
return signers.has(account);
}
function addSigner(address account) public onlySigner {
_addSigner(account);
}
function renounceSigner() public {
_removeSigner(msg.sender);
}
function _addSigner(address account) internal {
signers.add(account);
emit SignerAdded(account);
}
function _removeSigner(address account) internal {
signers.remove(account);
emit SignerRemoved(account);
}
}
contracts/crowdsale/Crowdsale.sol 0 → 100644
pragma solidity ^0.4.24;
import "../Initializable.sol";
import "../token/ERC20/IERC20.sol";
import "../math/SafeMath.sol";
import "../token/ERC20/SafeERC20.sol";
/**
* @title Crowdsale
* @dev Crowdsale is a base contract for managing a token crowdsale,
* allowing investors to purchase tokens with ether. This contract implements
* such functionality in its most fundamental form and can be extended to provide additional
* functionality and/or custom behavior.
* The external interface represents the basic interface for purchasing tokens, and conform
* the base architecture for crowdsales. They are *not* intended to be modified / overridden.
* The internal interface conforms the extensible and modifiable surface of crowdsales. Override
* the methods to add functionality. Consider using 'super' where appropriate to concatenate
* behavior.
*/
contract Crowdsale is Initializable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// The token being sold
IERC20 private _token;
// Address where funds are collected
address private _wallet;
// How many token units a buyer gets per wei.
// The rate is the conversion between wei and the smallest and indivisible token unit.
// So, if you are using a rate of 1 with a ERC20Detailed token with 3 decimals called TOK
// 1 wei will give you 1 unit, or 0.001 TOK.
uint256 private _rate;
// Amount of wei raised
uint256 private _weiRaised;
/**
* Event for token purchase logging
* @param purchaser who paid for the tokens
* @param beneficiary who got the tokens
* @param value weis paid for purchase
* @param amount amount of tokens purchased
*/
event TokensPurchased(
address indexed purchaser,
address indexed beneficiary,
uint256 value,
uint256 amount
);
/**
* @param rate Number of token units a buyer gets per wei
* @dev The rate is the conversion between wei and the smallest and indivisible
* token unit. So, if you are using a rate of 1 with a ERC20Detailed token
* with 3 decimals called TOK, 1 wei will give you 1 unit, or 0.001 TOK.
* @param wallet Address where collected funds will be forwarded to
* @param token Address of the token being sold
*/
function initialize(uint256 rate, address wallet, IERC20 token) public initializer {
require(rate > 0);
require(wallet != address(0));
require(token != address(0));
_rate = rate;
_wallet = wallet;
_token = token;
}
// -----------------------------------------
// Crowdsale external interface
// -----------------------------------------
/**
* @dev fallback function ***DO NOT OVERRIDE***
*/
function () external payable {
buyTokens(msg.sender);
}
/**
* @return the token being sold.
*/
function token() public view returns(IERC20) {
return _token;
}
/**
* @return the address where funds are collected.
*/
function wallet() public view returns(address) {
return _wallet;
}
/**
* @return the number of token units a buyer gets per wei.
*/
function rate() public view returns(uint256) {
return _rate;
}
/**
* @return the mount of wei raised.
*/
function weiRaised() public view returns (uint256) {
return _weiRaised;
}
/**
* @dev low level token purchase ***DO NOT OVERRIDE***
* @param beneficiary Address performing the token purchase
*/
function buyTokens(address beneficiary) public payable {
uint256 weiAmount = msg.value;
_preValidatePurchase(beneficiary, weiAmount);
// calculate token amount to be created
uint256 tokens = _getTokenAmount(weiAmount);
// update state
_weiRaised = _weiRaised.add(weiAmount);
_processPurchase(beneficiary, tokens);
emit TokensPurchased(
msg.sender,
beneficiary,
weiAmount,
tokens
);
_updatePurchasingState(beneficiary, weiAmount);
_forwardFunds();
_postValidatePurchase(beneficiary, weiAmount);
}
// -----------------------------------------
// Internal interface (extensible)
// -----------------------------------------
/**
* @dev Validation of an incoming purchase. Use require statements to revert state when conditions are not met. Use `super` in contracts that inherit from Crowdsale to extend their validations.
* Example from CappedCrowdsale.sol's _preValidatePurchase method:
* super._preValidatePurchase(beneficiary, weiAmount);
* require(weiRaised().add(weiAmount) <= cap);
* @param beneficiary Address performing the token purchase
* @param weiAmount Value in wei involved in the purchase
*/
function _preValidatePurchase(
address beneficiary,
uint256 weiAmount
)
internal
{
require(beneficiary != address(0));
require(weiAmount != 0);
}
/**
* @dev Validation of an executed purchase. Observe state and use revert statements to undo rollback when valid conditions are not met.
* @param beneficiary Address performing the token purchase
* @param weiAmount Value in wei involved in the purchase
*/
function _postValidatePurchase(
address beneficiary,
uint256 weiAmount
)
internal
{
// optional override
}
/**
* @dev Source of tokens. Override this method to modify the way in which the crowdsale ultimately gets and sends its tokens.
* @param beneficiary Address performing the token purchase
* @param tokenAmount Number of tokens to be emitted
*/
function _deliverTokens(
address beneficiary,
uint256 tokenAmount
)
internal
{
_token.safeTransfer(beneficiary, tokenAmount);
}
/**
* @dev Executed when a purchase has been validated and is ready to be executed. Not necessarily emits/sends tokens.
* @param beneficiary Address receiving the tokens
* @param tokenAmount Number of tokens to be purchased
*/
function _processPurchase(
address beneficiary,
uint256 tokenAmount
)
internal
{
_deliverTokens(beneficiary, tokenAmount);
}
/**
* @dev Override for extensions that require an internal state to check for validity (current user contributions, etc.)
* @param beneficiary Address receiving the tokens
* @param weiAmount Value in wei involved in the purchase
*/
function _updatePurchasingState(
address beneficiary,
uint256 weiAmount
)
internal
{
// optional override
}
/**
* @dev Override to extend the way in which ether is converted to tokens.
* @param weiAmount Value in wei to be converted into tokens
* @return Number of tokens that can be purchased with the specified _weiAmount
*/
function _getTokenAmount(uint256 weiAmount)
internal view returns (uint256)
{
return weiAmount.mul(_rate);
}
/**
* @dev Determines how ETH is stored/forwarded on purchases.
*/
function _forwardFunds() internal {
_wallet.transfer(msg.value);
}
}
contracts/crowdsale/distribution/FinalizableCrowdsale.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../../math/SafeMath.sol";
import "../validation/TimedCrowdsale.sol";
/**
* @title FinalizableCrowdsale
* @dev Extension of Crowdsale with a one-off finalization action, where one
* can do extra work after finishing.
*/
contract FinalizableCrowdsale is Initializable, TimedCrowdsale {
using SafeMath for uint256;
bool private _finalized = false;
event CrowdsaleFinalized();
/**
* @return true if the crowdsale is finalized, false otherwise.
*/
function finalized() public view returns (bool) {
return _finalized;
}
/**
* @dev Must be called after crowdsale ends, to do some extra finalization
* work. Calls the contract's finalization function.
*/
function finalize() public {
require(!_finalized);
require(hasClosed());
_finalization();
emit CrowdsaleFinalized();
_finalized = true;
}
/**
* @dev Can be overridden to add finalization logic. The overriding function
* should call super._finalization() to ensure the chain of finalization is
* executed entirely.
*/
function _finalization() internal {
}
}
contracts/crowdsale/distribution/PostDeliveryCrowdsale.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../validation/TimedCrowdsale.sol";
import "../../token/ERC20/IERC20.sol";
import "../../math/SafeMath.sol";
/**
* @title PostDeliveryCrowdsale
* @dev Crowdsale that locks tokens from withdrawal until it ends.
*/
contract PostDeliveryCrowdsale is Initializable, TimedCrowdsale {
using SafeMath for uint256;
mapping(address => uint256) private _balances;
/**
* @dev Withdraw tokens only after crowdsale ends.
* @param beneficiary Whose tokens will be withdrawn.
*/
function withdrawTokens(address beneficiary) public {
require(hasClosed());
uint256 amount = _balances[beneficiary];
require(amount > 0);
_balances[beneficiary] = 0;
_deliverTokens(beneficiary, amount);
}
/**
* @return the balance of an account.
*/
function balanceOf(address account) public view returns(uint256) {
return _balances[account];
}
/**
* @dev Overrides parent by storing balances instead of issuing tokens right away.
* @param beneficiary Token purchaser
* @param tokenAmount Amount of tokens purchased
*/
function _processPurchase(
address beneficiary,
uint256 tokenAmount
)
internal
{
_balances[beneficiary] = _balances[beneficiary].add(tokenAmount);
}
}
contracts/crowdsale/distribution/RefundableCrowdsale.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../../math/SafeMath.sol";
import "./FinalizableCrowdsale.sol";
import "../../payment/RefundEscrow.sol";
/**
* @title RefundableCrowdsale
* @dev Extension of Crowdsale contract that adds a funding goal, and
* the possibility of users getting a refund if goal is not met.
*/
contract RefundableCrowdsale is Initializable, FinalizableCrowdsale {
using SafeMath for uint256;
// minimum amount of funds to be raised in weis
uint256 private _goal;
// refund escrow used to hold funds while crowdsale is running
RefundEscrow private _escrow;
/**
* @dev Constructor, creates RefundEscrow.
* @param goal Funding goal
*/
function initialize(uint256 goal) public initializer {
require(goal > 0);
// conditional added to make initializer idempotent in case of diamond inheritance
if (address(_escrow) == address(0)) {
_escrow = new RefundEscrow();
_escrow.initialize(wallet());
}
_goal = goal;
}
/**
* @return minimum amount of funds to be raised in wei.
*/
function goal() public view returns(uint256) {
return _goal;
}
/**
* @dev Investors can claim refunds here if crowdsale is unsuccessful
* @param beneficiary Whose refund will be claimed.
*/
function claimRefund(address beneficiary) public {
require(finalized());
require(!goalReached());
_escrow.withdraw(beneficiary);
}
/**
* @dev Checks whether funding goal was reached.
* @return Whether funding goal was reached
*/
function goalReached() public view returns (bool) {
return weiRaised() >= _goal;
}
/**
* @dev escrow finalization task, called when finalize() is called
*/
function _finalization() internal {
if (goalReached()) {
_escrow.close();
_escrow.beneficiaryWithdraw();
} else {
_escrow.enableRefunds();
}
super._finalization();
}
/**
* @dev Overrides Crowdsale fund forwarding, sending funds to escrow.
*/
function _forwardFunds() internal {
_escrow.deposit.value(msg.value)(msg.sender);
}
}
contracts/crowdsale/emission/AllowanceCrowdsale.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../Crowdsale.sol";
import "../../token/ERC20/IERC20.sol";
import "../../token/ERC20/SafeERC20.sol";
import "../../math/SafeMath.sol";
/**
* @title AllowanceCrowdsale
* @dev Extension of Crowdsale where tokens are held by a wallet, which approves an allowance to the crowdsale.
*/
contract AllowanceCrowdsale is Initializable, Crowdsale {
using SafeMath for uint256;
using SafeERC20 for IERC20;
address private _tokenWallet;
/**
* @dev Constructor, takes token wallet address.
* @param tokenWallet Address holding the tokens, which has approved allowance to the crowdsale
*/
function initialize(address tokenWallet) public initializer {
require(tokenWallet != address(0));
_tokenWallet = tokenWallet;
}
/**
* @return the address of the wallet that will hold the tokens.
*/
function tokenWallet() public view returns(address) {
return _tokenWallet;
}
/**
* @dev Checks the amount of tokens left in the allowance.
* @return Amount of tokens left in the allowance
*/
function remainingTokens() public view returns (uint256) {
return token().allowance(_tokenWallet, this);
}
/**
* @dev Overrides parent behavior by transferring tokens from wallet.
* @param beneficiary Token purchaser
* @param tokenAmount Amount of tokens purchased
*/
function _deliverTokens(
address beneficiary,
uint256 tokenAmount
)
internal
{
token().safeTransferFrom(_tokenWallet, beneficiary, tokenAmount);
}
}
contracts/crowdsale/emission/MintedCrowdsale.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../Crowdsale.sol";
import "../../token/ERC20/ERC20Mintable.sol";
/**
* @title MintedCrowdsale
* @dev Extension of Crowdsale contract whose tokens are minted in each purchase.
* Token ownership should be transferred to MintedCrowdsale for minting.
*/
contract MintedCrowdsale is Initializable, Crowdsale {
/**
* @dev Overrides delivery by minting tokens upon purchase.
* @param beneficiary Token purchaser
* @param tokenAmount Number of tokens to be minted
*/
function _deliverTokens(
address beneficiary,
uint256 tokenAmount
)
internal
{
// Potentially dangerous assumption about the type of the token.
require(
ERC20Mintable(address(token())).mint(beneficiary, tokenAmount));
}
}
contracts/crowdsale/price/IncreasingPriceCrowdsale.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../validation/TimedCrowdsale.sol";
import "../../math/SafeMath.sol";
/**
* @title IncreasingPriceCrowdsale
* @dev Extension of Crowdsale contract that increases the price of tokens linearly in time.
* Note that what should be provided to the constructor is the initial and final _rates_, that is,
* the amount of tokens per wei contributed. Thus, the initial rate must be greater than the final rate.
*/
contract IncreasingPriceCrowdsale is Initializable, TimedCrowdsale {
using SafeMath for uint256;
uint256 private _initialRate;
uint256 private _finalRate;
/**
* @dev Constructor, takes initial and final rates of tokens received per wei contributed.
* @param initialRate Number of tokens a buyer gets per wei at the start of the crowdsale
* @param finalRate Number of tokens a buyer gets per wei at the end of the crowdsale
*/
function initialize(uint256 initialRate, uint256 finalRate) public initializer {
require(finalRate > 0);
require(initialRate >= finalRate);
_initialRate = initialRate;
_finalRate = finalRate;
}
/**
* @return the initial rate of the crowdsale.
*/
function initialRate() public view returns(uint256) {
return _initialRate;
}
/**
* @return the final rate of the crowdsale.
*/
function finalRate() public view returns (uint256) {
return _finalRate;
}
/**
* @dev Returns the rate of tokens per wei at the present time.
* Note that, as price _increases_ with time, the rate _decreases_.
* @return The number of tokens a buyer gets per wei at a given time
*/
function getCurrentRate() public view returns (uint256) {
// solium-disable-next-line security/no-block-members
uint256 elapsedTime = block.timestamp.sub(openingTime());
uint256 timeRange = closingTime().sub(openingTime());
uint256 rateRange = _initialRate.sub(_finalRate);
return _initialRate.sub(elapsedTime.mul(rateRange).div(timeRange));
}
/**
* @dev Overrides parent method taking into account variable rate.
* @param weiAmount The value in wei to be converted into tokens
* @return The number of tokens _weiAmount wei will buy at present time
*/
function _getTokenAmount(uint256 weiAmount)
internal view returns (uint256)
{
uint256 currentRate = getCurrentRate();
return currentRate.mul(weiAmount);
}
}
contracts/crowdsale/validation/CappedCrowdsale.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../../math/SafeMath.sol";
import "../Crowdsale.sol";
/**
* @title CappedCrowdsale
* @dev Crowdsale with a limit for total contributions.
*/
contract CappedCrowdsale is Initializable, Crowdsale {
using SafeMath for uint256;
uint256 private _cap;
/**
* @dev Constructor, takes maximum amount of wei accepted in the crowdsale.
* @param cap Max amount of wei to be contributed
*/
function initialize(uint256 cap) public initializer {
require(cap > 0);
_cap = cap;
}
/**
* @return the cap of the crowdsale.
*/
function cap() public view returns(uint256) {
return _cap;
}
/**
* @dev Checks whether the cap has been reached.
* @return Whether the cap was reached
*/
function capReached() public view returns (bool) {
return weiRaised() >= _cap;
}
/**
* @dev Extend parent behavior requiring purchase to respect the funding cap.
* @param beneficiary Token purchaser
* @param weiAmount Amount of wei contributed
*/
function _preValidatePurchase(
address beneficiary,
uint256 weiAmount
)
internal
{
super._preValidatePurchase(beneficiary, weiAmount);
require(weiRaised().add(weiAmount) <= _cap);
}
}
contracts/crowdsale/validation/IndividuallyCappedCrowdsale.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../../math/SafeMath.sol";
import "../Crowdsale.sol";
import "../../access/roles/CapperRole.sol";
/**
* @title IndividuallyCappedCrowdsale
* @dev Crowdsale with per-beneficiary caps.
*/
contract IndividuallyCappedCrowdsale is Initializable, Crowdsale, CapperRole {
using SafeMath for uint256;
mapping(address => uint256) private _contributions;
mapping(address => uint256) private _caps;
function initialize() public initializer {
CapperRole.initialize();
}
/**
* @dev Sets a specific beneficiary's maximum contribution.
* @param beneficiary Address to be capped
* @param cap Wei limit for individual contribution
*/
function setCap(address beneficiary, uint256 cap) external onlyCapper {
_caps[beneficiary] = cap;
}
/**
* @dev Returns the cap of a specific beneficiary.
* @param beneficiary Address whose cap is to be checked
* @return Current cap for individual beneficiary
*/
function getCap(address beneficiary) public view returns (uint256) {
return _caps[beneficiary];
}
/**
* @dev Returns the amount contributed so far by a specific beneficiary.
* @param beneficiary Address of contributor
* @return Beneficiary contribution so far
*/
function getContribution(address beneficiary)
public view returns (uint256)
{
return _contributions[beneficiary];
}
/**
* @dev Extend parent behavior requiring purchase to respect the beneficiary's funding cap.
* @param beneficiary Token purchaser
* @param weiAmount Amount of wei contributed
*/
function _preValidatePurchase(
address beneficiary,
uint256 weiAmount
)
internal
{
super._preValidatePurchase(beneficiary, weiAmount);
require(
_contributions[beneficiary].add(weiAmount) <= _caps[beneficiary]);
}
/**
* @dev Extend parent behavior to update beneficiary contributions
* @param beneficiary Token purchaser
* @param weiAmount Amount of wei contributed
*/
function _updatePurchasingState(
address beneficiary,
uint256 weiAmount
)
internal
{
super._updatePurchasingState(beneficiary, weiAmount);
_contributions[beneficiary] = _contributions[beneficiary].add(
weiAmount);
}
}
contracts/crowdsale/validation/TimedCrowdsale.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../../math/SafeMath.sol";
import "../Crowdsale.sol";
/**
* @title TimedCrowdsale
* @dev Crowdsale accepting contributions only within a time frame.
*/
contract TimedCrowdsale is Initializable, Crowdsale {
using SafeMath for uint256;
uint256 private _openingTime;
uint256 private _closingTime;
/**
* @dev Reverts if not in crowdsale time range.
*/
modifier onlyWhileOpen {
require(isOpen());
_;
}
/**
* @dev Constructor, takes crowdsale opening and closing times.
* @param openingTime Crowdsale opening time
* @param closingTime Crowdsale closing time
*/
function initialize(uint256 openingTime, uint256 closingTime) public initializer {
// solium-disable-next-line security/no-block-members
require(openingTime >= block.timestamp);
require(closingTime >= openingTime);
_openingTime = openingTime;
_closingTime = closingTime;
}
/**
* @return the crowdsale opening time.
*/
function openingTime() public view returns(uint256) {
return _openingTime;
}
/**
* @return the crowdsale closing time.
*/
function closingTime() public view returns(uint256) {
return _closingTime;
}
/**
* @return true if the crowdsale is open, false otherwise.
*/
function isOpen() public view returns (bool) {
// solium-disable-next-line security/no-block-members
return block.timestamp >= _openingTime && block.timestamp <= _closingTime;
}
/**
* @dev Checks whether the period in which the crowdsale is open has already elapsed.
* @return Whether crowdsale period has elapsed
*/
function hasClosed() public view returns (bool) {
// solium-disable-next-line security/no-block-members
return block.timestamp > _closingTime;
}
/**
* @dev Extend parent behavior requiring to be within contributing period
* @param beneficiary Token purchaser
* @param weiAmount Amount of wei contributed
*/
function _preValidatePurchase(
address beneficiary,
uint256 weiAmount
)
internal
onlyWhileOpen
{
super._preValidatePurchase(beneficiary, weiAmount);
}
}
contracts/ECRecovery.sol → contracts/cryptography/ECDSA.sol
pragma solidity ^0.4.21;
pragma solidity ^0.4.24;
/**
* @title Eliptic curve signature operations
*
* @title Elliptic curve signature operations
* @dev Based on https://gist.github.com/axic/5b33912c6f61ae6fd96d6c4a47afde6d
*
* TODO Remove this library once solidity supports passing a signature to ecrecover.
* See https://github.com/ethereum/solidity/issues/864
*
*/
library ECRecovery {
library ECDSA {
/**
* @dev Recover signer address from a message by using their signature
* @param hash bytes32 message, the hash is the signed message. What is recovered is the signer address.
* @param sig bytes signature, the signature is generated using web3.eth.sign()
* @param signature bytes signature, the signature is generated using web3.eth.sign()
*/
function recover(bytes32 hash, bytes sig)
function recover(bytes32 hash, bytes signature)
internal
pure
returns (address)
......@@ -28,7 +25,7 @@ library ECRecovery {
uint8 v;
// Check the signature length
if (sig.length != 65) {
if (signature.length != 65) {
return (address(0));
}
......@@ -37,9 +34,9 @@ library ECRecovery {
// currently is to use assembly.
// solium-disable-next-line security/no-inline-assembly
assembly {
r := mload(add(sig, 32))
s := mload(add(sig, 64))
v := byte(0, mload(add(sig, 96)))
r := mload(add(signature, 32))
s := mload(add(signature, 64))
v := byte(0, mload(add(signature, 96)))
}
// Version of signature should be 27 or 28, but 0 and 1 are also possible versions
......@@ -59,7 +56,7 @@ library ECRecovery {
/**
* toEthSignedMessageHash
* @dev prefix a bytes32 value with "\x19Ethereum Signed Message:"
* @dev and hash the result
* and hash the result
*/
function toEthSignedMessageHash(bytes32 hash)
internal
......@@ -69,8 +66,7 @@ library ECRecovery {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(
"\x19Ethereum Signed Message:\n32",
hash
abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)
);
}
}
contracts/cryptography/MerkleProof.sol 0 → 100644
pragma solidity ^0.4.24;
/**
* @title MerkleProof
* @dev Merkle proof verification based on
* https://github.com/ameensol/merkle-tree-solidity/blob/master/src/MerkleProof.sol
*/
library MerkleProof {
/**
* @dev Verifies a Merkle proof proving the existence of a leaf in a Merkle tree. Assumes that each pair of leaves
* and each pair of pre-images are sorted.
* @param proof Merkle proof containing sibling hashes on the branch from the leaf to the root of the Merkle tree
* @param root Merkle root
* @param leaf Leaf of Merkle tree
*/
function verify(
bytes32[] proof,
bytes32 root,
bytes32 leaf
)
internal
pure
returns (bool)
{
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash < proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == root;
}
}
contracts/drafts/BreakInvariantBounty.sol 0 → 100644
pragma solidity ^0.4.24;
import "../Initializable.sol";
import "../payment/PullPayment.sol";
import "../ownership/Ownable.sol";
/**
* @title BreakInvariantBounty
* @dev This bounty will pay out to a researcher if they break invariant logic of the contract.
*/
contract BreakInvariantBounty is Initializable, PullPayment, Ownable {
bool private _claimed;
mapping(address => address) private _researchers;
event TargetCreated(address createdAddress);
function initialize() public initializer {
PullPayment.initialize();
Ownable.initialize();
}
/**
* @dev Fallback function allowing the contract to receive funds, if they haven't already been claimed.
*/
function() external payable {
require(!_claimed);
}
/**
* @dev Determine if the bounty was claimed.
* @return true if the bounty was claimed, false otherwise.
*/
function claimed() public view returns(bool) {
return _claimed;
}
/**
* @dev Create and deploy the target contract (extension of Target contract), and sets the
* msg.sender as a researcher
* @return A target contract
*/
function createTarget() public returns(Target) {
Target target = Target(_deployContract());
_researchers[target] = msg.sender;
emit TargetCreated(target);
return target;
}
/**
* @dev Transfers the contract funds to the researcher that proved the contract is broken.
* @param target contract
*/
function claim(Target target) public {
address researcher = _researchers[target];
require(researcher != address(0));
// Check Target contract invariants
require(!target.checkInvariant());
_asyncTransfer(researcher, address(this).balance);
_claimed = true;
}
/**
* @dev Transfers the current balance to the owner and terminates the contract.
*/
function destroy() public onlyOwner {
selfdestruct(owner());
}
/**
* @dev Internal function to deploy the target contract.
* @return A target contract address
*/
function _deployContract() internal returns(address);
}
/**
* @title Target
* @dev Your main contract should inherit from this class and implement the checkInvariant method.
*/
contract Target {
/**
* @dev Checks all values a contract assumes to be true all the time. If this function returns
* false, the contract is broken in some way and is in an inconsistent state.
* In order to win the bounty, security researchers will try to cause this broken state.
* @return True if all invariant values are correct, false otherwise.
*/
function checkInvariant() public returns(bool);
}
contracts/drafts/Counter.sol 0 → 100644
pragma solidity ^0.4.24;
/**
* @title Counter
* @author Matt Condon (@shrugs)
* @dev Provides an incrementing uint256 id acquired by the `Counter#next` getter.
* Use this for issuing ERC721 ids or keeping track of request ids, anything you want, really.
*
* Include with `using Counter for Counter.Counter;`
* @notice Does not allow an Id of 0, which is popularly used to signify a null state in solidity.
* Does not protect from overflows, but if you have 2^256 ids, you have other problems.
* (But actually, it's generally impossible to increment a counter this many times, energy wise
* so it's not something you have to worry about.)
*/
library Counter {
struct Counter {
uint256 current; // default: 0
}
function next(Counter storage index)
internal
returns (uint256)
{
index.current += 1;
return index.current;
}
}
contracts/drafts/ERC1046/TokenMetadata.sol 0 → 100644
pragma solidity ^0.4.24;
import "../../Initializable.sol";
import "../../token/ERC20/IERC20.sol";
/**
* @title ERC-1047 Token Metadata
* @dev See https://eips.ethereum.org/EIPS/eip-1046
* @dev tokenURI must respond with a URI that implements https://eips.ethereum.org/EIPS/eip-1047
* @dev TODO - update https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/token/ERC721/IERC721.sol#L17 when 1046 is finalized
*/
contract ERC20TokenMetadata is Initializable, IERC20 {
function tokenURI() external view returns (string);
}
contract ERC20WithMetadata is Initializable, ERC20TokenMetadata {
string private _tokenURI = "";
function initialize(string tokenURI)
public
initializer
{
_tokenURI = tokenURI;
}
function tokenURI() external view returns (string) {
return _tokenURI;
}
}
contracts/drafts/ERC20Migrator.sol 0 → 100644
pragma solidity ^0.4.24;
import "../Initializable.sol";
import "../token/ERC20/IERC20.sol";
import "../token/ERC20/ERC20Mintable.sol";
import "../token/ERC20/SafeERC20.sol";
import "../math/Math.sol";
/**
* @title ERC20Migrator
* @dev This contract can be used to migrate an ERC20 token from one
* contract to another, where each token holder has to opt-in to the migration.
* To opt-in, users must approve for this contract the number of tokens they
* want to migrate. Once the allowance is set up, anyone can trigger the
* migration to the new token contract. In this way, token holders "turn in"
* their old balance and will be minted an equal amount in the new token.
* The new token contract must be mintable. For the precise interface refer to
* OpenZeppelin's ERC20Mintable, but the only functions that are needed are
* `isMinter(address)` and `mint(address, amount)`. The migrator will check
* that it is a minter for the token.
* The balance from the legacy token will be transfered to the migrator, as it
* is migrated, and remain there forever.
* Although this contract can be used in many different scenarios, the main
* motivation was to provide a way to migrate ERC20 tokens into an upgradeable
* version of it using ZeppelinOS. To read more about how this can be done
* using this implementation, please follow the official documentation site of
* ZeppelinOS: https://docs.zeppelinos.org/docs/erc20_onboarding.html
* Example of usage:
* ```
* const migrator = await ERC20Migrator.new(legacyToken.address);
* await newToken.addMinter(migrator.address);
* await migrator.beginMigration(newToken.address);
* ```
*/
contract ERC20Migrator is Initializable {
using SafeERC20 for IERC20;
/// Address of the old token contract
IERC20 private _legacyToken;
/// Address of the new token contract
ERC20Mintable private _newToken;
/**
* @param legacyToken address of the old token contract
*/
function initialize(IERC20 legacyToken) public initializer {
require(legacyToken != address(0));
_legacyToken = legacyToken;
}
/**
* @dev Returns the legacy token that is being migrated.
*/
function legacyToken() public view returns (IERC20) {
return _legacyToken;
}
/**
* @dev Returns the new token to which we are migrating.
*/
function newToken() public view returns (IERC20) {
return _newToken;
}
/**
* @dev Begins the migration by setting which is the new token that will be
* minted. This contract must be a minter for the new token.
* @param newToken the token that will be minted
*/
function beginMigration(ERC20Mintable newToken) public {
require(_newToken == address(0));
require(newToken != address(0));
require(newToken.isMinter(this));
_newToken = newToken;
}
/**
* @dev Transfers part of an account's balance in the old token to this
* contract, and mints the same amount of new tokens for that account.
* @param account whose tokens will be migrated
* @param amount amount of tokens to be migrated
*/
function migrate(address account, uint256 amount) public {
_legacyToken.safeTransferFrom(account, this, amount);
_newToken.mint(account, amount);
}
/**
* @dev Transfers all of an account's allowed balance in the old token to
* this contract, and mints the same amount of new tokens for that account.
* @param account whose tokens will be migrated
*/
function migrateAll(address account) public {
uint256 balance = _legacyToken.balanceOf(account);
uint256 allowance = _legacyToken.allowance(account, this);
uint256 amount = Math.min(balance, allowance);
migrate(account, amount);
}
}
contracts/drafts/SignatureBouncer.sol 0 → 100644
pragma solidity ^0.4.24;
import "../Initializable.sol";
import "../access/roles/SignerRole.sol";
import "../cryptography/ECDSA.sol";
/**
* @title SignatureBouncer
* @author PhABC, Shrugs and aflesher
* @dev SignatureBouncer allows users to submit a signature as a permission to do an action.
* If the signature is from one of the authorized signer addresses, the signature
* is valid.
* Signer addresses can be individual servers signing grants or different
* users within a decentralized club that have permission to invite other members.
* This technique is useful for whitelists and airdrops; instead of putting all
* valid addresses on-chain, simply sign a grant of the form
* keccak256(abi.encodePacked(`:contractAddress` + `:granteeAddress`)) using a valid signer address.
* Then restrict access to your crowdsale/whitelist/airdrop using the
* `onlyValidSignature` modifier (or implement your own using _isValidSignature).
* In addition to `onlyValidSignature`, `onlyValidSignatureAndMethod` and
* `onlyValidSignatureAndData` can be used to restrict access to only a given method
* or a given method with given parameters respectively.
* See the tests in SignatureBouncer.test.js for specific usage examples.
* @notice A method that uses the `onlyValidSignatureAndData` modifier must make the _signature
* parameter the "last" parameter. You cannot sign a message that has its own
* signature in it so the last 128 bytes of msg.data (which represents the
* length of the _signature data and the _signaature data itself) is ignored when validating.
* Also non fixed sized parameters make constructing the data in the signature
* much more complex. See https://ethereum.stackexchange.com/a/50616 for more details.
*/
contract SignatureBouncer is Initializable, SignerRole {
using ECDSA for bytes32;
// Function selectors are 4 bytes long, as documented in
// https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector
uint256 private constant _METHOD_ID_SIZE = 4;
// Signature size is 65 bytes (tightly packed v + r + s), but gets padded to 96 bytes
uint256 private constant _SIGNATURE_SIZE = 96;
/**
* @dev requires that a valid signature of a signer was provided
*/
modifier onlyValidSignature(bytes signature)
{
require(_isValidSignature(msg.sender, signature));
_;
}
/**
* @dev requires that a valid signature with a specifed method of a signer was provided
*/
modifier onlyValidSignatureAndMethod(bytes signature)
{
require(_isValidSignatureAndMethod(msg.sender, signature));
_;
}
/**
* @dev requires that a valid signature with a specifed method and params of a signer was provided
*/
modifier onlyValidSignatureAndData(bytes signature)
{
require(_isValidSignatureAndData(msg.sender, signature));
_;
}
function initialize() public initializer {
SignerRole.initialize();
}
/**
* @dev is the signature of `this + sender` from a signer?
* @return bool
*/
function _isValidSignature(address account, bytes signature)
internal
view
returns (bool)
{
return _isValidDataHash(
keccak256(abi.encodePacked(address(this), account)),
signature
);
}
/**
* @dev is the signature of `this + sender + methodId` from a signer?
* @return bool
*/
function _isValidSignatureAndMethod(address account, bytes signature)
internal
view
returns (bool)
{
bytes memory data = new bytes(_METHOD_ID_SIZE);
for (uint i = 0; i < data.length; i++) {
data[i] = msg.data[i];
}
return _isValidDataHash(
keccak256(abi.encodePacked(address(this), account, data)),
signature
);
}
/**
* @dev is the signature of `this + sender + methodId + params(s)` from a signer?
* @notice the signature parameter of the method being validated must be the "last" parameter
* @return bool
*/
function _isValidSignatureAndData(address account, bytes signature)
internal
view
returns (bool)
{
require(msg.data.length > _SIGNATURE_SIZE);
bytes memory data = new bytes(msg.data.length - _SIGNATURE_SIZE);
for (uint i = 0; i < data.length; i++) {
data[i] = msg.data[i];
}
return _isValidDataHash(
keccak256(abi.encodePacked(address(this), account, data)),
signature
);
}
/**
* @dev internal function to convert a hash to an eth signed message
* and then recover the signature and check it against the signer role
* @return bool
*/
function _isValidDataHash(bytes32 hash, bytes signature)
internal
view
returns (bool)
{
address signer = hash
.toEthSignedMessageHash()
.recover(signature);
return signer != address(0) && isSigner(signer);
}
}
contracts/drafts/TokenVesting.sol 0 → 100644
/* solium-disable security/no-block-members */
pragma solidity ^0.4.24;
import "../Initializable.sol";
import "../token/ERC20/SafeERC20.sol";
import "../ownership/Ownable.sol";
import "../math/SafeMath.sol";
/**
* @title TokenVesting
* @dev A token holder contract that can release its token balance gradually like a
* typical vesting scheme, with a cliff and vesting period. Optionally revocable by the
* owner.
*/
contract TokenVesting is Initializable, Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
event Released(uint256 amount);
event Revoked();
// beneficiary of tokens after they are released
address private _beneficiary;
uint256 private _cliff;
uint256 private _start;
uint256 private _duration;
bool private _revocable;
mapping (address => uint256) private _released;
mapping (address => bool) private _revoked;
/**
* @dev Creates a vesting contract that vests its balance of any ERC20 token to the
* beneficiary, gradually in a linear fashion until start + duration. By then all
* of the balance will have vested.
* @param beneficiary address of the beneficiary to whom vested tokens are transferred
* @param cliffDuration duration in seconds of the cliff in which tokens will begin to vest
* @param start the time (as Unix time) at which point vesting starts
* @param duration duration in seconds of the period in which the tokens will vest
* @param revocable whether the vesting is revocable or not
*/
function initialize(
address beneficiary,
uint256 start,
uint256 cliffDuration,
uint256 duration,
bool revocable
)
public
initializer
{
Ownable.initialize();
require(beneficiary != address(0));
require(cliffDuration <= duration);
_beneficiary = beneficiary;
_revocable = revocable;
_duration = duration;
_cliff = start.add(cliffDuration);
_start = start;
}
/**
* @return the beneficiary of the tokens.
*/
function beneficiary() public view returns(address) {
return _beneficiary;
}
/**
* @return the cliff time of the token vesting.
*/
function cliff() public view returns(uint256) {
return _cliff;
}
/**
* @return the start time of the token vesting.
*/
function start() public view returns(uint256) {
return _start;
}
/**
* @return the duration of the token vesting.
*/
function duration() public view returns(uint256) {
return _duration;
}
/**
* @return true if the vesting is revocable.
*/
function revocable() public view returns(bool) {
return _revocable;
}
/**
* @return the amount of the token released.
*/
function released(address token) public view returns(uint256) {
return _released[token];
}
/**
* @return true if the token is revoked.
*/
function revoked(address token) public view returns(bool) {
return _revoked[token];
}
/**
* @notice Transfers vested tokens to beneficiary.
* @param token ERC20 token which is being vested
*/
function release(IERC20 token) public {
uint256 unreleased = releasableAmount(token);
require(unreleased > 0);
_released[token] = _released[token].add(unreleased);
token.safeTransfer(_beneficiary, unreleased);
emit Released(unreleased);
}
/**
* @notice Allows the owner to revoke the vesting. Tokens already vested
* remain in the contract, the rest are returned to the owner.
* @param token ERC20 token which is being vested
*/
function revoke(IERC20 token) public onlyOwner {
require(_revocable);
require(!_revoked[token]);
uint256 balance = token.balanceOf(address(this));
uint256 unreleased = releasableAmount(token);
uint256 refund = balance.sub(unreleased);
_revoked[token] = true;
token.safeTransfer(owner(), refund);
emit Revoked();
}
/**
* @dev Calculates the amount that has already vested but hasn't been released yet.
* @param token ERC20 token which is being vested
*/
function releasableAmount(IERC20 token) public view returns (uint256) {
return vestedAmount(token).sub(_released[token]);
}
/**
* @dev Calculates the amount that has already vested.
* @param token ERC20 token which is being vested
*/
function vestedAmount(IERC20 token) public view returns (uint256) {
uint256 currentBalance = token.balanceOf(this);
uint256 totalBalance = currentBalance.add(_released[token]);
if (block.timestamp < _cliff) {
return 0;
} else if (block.timestamp >= _start.add(_duration) || _revoked[token]) {
return totalBalance;
} else {
return totalBalance.mul(block.timestamp.sub(_start)).div(_duration);
}
}
}
contracts/examples/SampleCrowdsale.sol 0 → 100644
pragma solidity ^0.4.24;
import "../Initializable.sol";
import "../crowdsale/validation/CappedCrowdsale.sol";
import "../crowdsale/distribution/RefundableCrowdsale.sol";
import "../crowdsale/emission/MintedCrowdsale.sol";
import "../token/ERC20/ERC20Mintable.sol";
/**
* @title SampleCrowdsaleToken
* @dev Very simple ERC20 Token that can be minted.
* It is meant to be used in a crowdsale contract.
*/
contract SampleCrowdsaleToken is Initializable, ERC20Mintable {
string public name;
string public symbol;
uint8 public decimals;
function initialize() public initializer {
ERC20Mintable.initialize();
name = "Sample Crowdsale Token";
symbol = "SCT";
decimals = 18;
}
}
/**
* @title SampleCrowdsale
* @dev This is an example of a fully fledged crowdsale.
* The way to add new features to a base crowdsale is by multiple inheritance.
* In this example we are providing following extensions:
* CappedCrowdsale - sets a max boundary for raised funds
* RefundableCrowdsale - set a min goal to be reached and returns funds if it's not met
*
* After adding multiple features it's good practice to run integration tests
* to ensure that subcontracts works together as intended.
*/
// XXX There doesn't seem to be a way to split this line that keeps solium
// happy. See:
// https://github.com/duaraghav8/Solium/issues/205
// --elopio - 2018-05-10
// solium-disable-next-line max-len
contract SampleCrowdsale is Initializable, Crowdsale, CappedCrowdsale, RefundableCrowdsale, MintedCrowdsale {
function initialize(
uint256 openingTime,
uint256 closingTime,
uint256 rate,
address wallet,
uint256 cap,
ERC20Mintable token,
uint256 goal
)
public
initializer
{
Crowdsale.initialize(rate, wallet, token);
CappedCrowdsale.initialize(cap);
TimedCrowdsale.initialize(openingTime, closingTime);
RefundableCrowdsale.initialize(goal);
//As goal needs to be met for a successful crowdsale
//the value needs to less or equal than a cap which is limit for accepted funds
require(goal <= cap);
}
}
contracts/examples/SimpleToken.sol 0 → 100644
pragma solidity ^0.4.24;
import "../Initializable.sol";
import "../token/ERC20/ERC20.sol";
/**
* @title SimpleToken
* @dev Very simple ERC20 Token example, where all tokens are pre-assigned to the creator.
* Note they can later distribute these tokens as they wish using `transfer` and other
* `ERC20` functions.
*/
contract SimpleToken is Initializable, ERC20 {
string public constant name = "SimpleToken";
string public constant symbol = "SIM";
uint8 public constant decimals = 18;
uint256 public constant INITIAL_SUPPLY = 10000 * (10 ** uint256(decimals));
/**
* @dev Constructor that gives msg.sender all of existing tokens.
*/
function initialize() public initializer {
_mint(msg.sender, INITIAL_SUPPLY);
}
}
contracts/introspection/ERC165.sol
pragma solidity ^0.4.21;
pragma solidity ^0.4.24;
import "../Initializable.sol";
import "./IERC165.sol";
/**
* @title ERC165
* @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md
* @author Matt Condon (@shrugs)
* @dev Implements ERC165 using a lookup table.
*/
interface ERC165 {
contract ERC165 is Initializable, IERC165 {
bytes4 private constant _InterfaceId_ERC165 = 0x01ffc9a7;
/**
* 0x01ffc9a7 ===
* bytes4(keccak256('supportsInterface(bytes4)'))
*/
/**
* @dev a mapping of interface id to whether or not it's supported
*/
mapping(bytes4 => bool) internal _supportedInterfaces;
/**
* @notice Query if a contract implements an interface
* @param _interfaceId The interface identifier, as specified in ERC-165
* @dev Interface identification is specified in ERC-165. This function
* uses less than 30,000 gas.
* @dev A contract implementing SupportsInterfaceWithLookup
* implement ERC165 itself
*/
function supportsInterface(bytes4 _interfaceId)
function initialize()
public
initializer
{
_registerInterface(_InterfaceId_ERC165);
}
/**
* @dev implement supportsInterface(bytes4) using a lookup table
*/
function supportsInterface(bytes4 interfaceId)
external
view
returns (bool);
returns (bool)
{
return _supportedInterfaces[interfaceId];
}
/**
* @dev private method for registering an interface
*/
function _registerInterface(bytes4 interfaceId)
internal
{
require(interfaceId != 0xffffffff);
_supportedInterfaces[interfaceId] = true;
}
}
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package-lock.json
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test/TESTING.md 0 → 100644
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