Merge pull request #1 from pmmax/master

Initial POC for the ERC20 ALGO token implementation (based on openzeppelin-solidity v2.0.0)
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pmmax authored and GitHub committed 2018-11-08 19:41:48 -03:00
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@@ -0,0 +1,37 @@
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@@ -0,0 +1,12 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netcoreapp2.1</TargetFramework>
<LangVersion>latest</LangVersion>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Nethereum.Web3" Version="2.5.1" />
</ItemGroup>
</Project>
@@ -0,0 +1,19 @@
using System;
using System.Collections.Generic;
using System.Text;
using Nethereum.Hex.HexConvertors.Extensions;
using Nethereum.Signer;
using Nethereum.Web3.Accounts;
namespace AdvancedAlgos.AlgoErc20Token.EthClientExtensions
{
public static class EthAccountFactory
{
public static Account Create()
{
var accountEcKey = EthECKey.GenerateKey();
var accountPrivateKey = accountEcKey.GetPrivateKeyAsBytes().ToHex();
return new Account(accountPrivateKey);
}
}
}
@@ -0,0 +1,24 @@
#pragma warning disable RCS1194 // Implement exception constructors.
using System;
using System.Collections.Generic;
using System.Text;
using Nethereum.RPC.Eth.DTOs;
namespace AdvancedAlgos.AlgoErc20Token.EthClientExtensions.Exceptions
{
public class TransactionRejectedException : Exception
{
private const string ERROR_MESSAGE = "Failed to execute the transaction.";
public TransactionRejectedException(TransactionReceipt transactionReceipt)
: base(ERROR_MESSAGE)
{
TransactionReceipt = transactionReceipt;
}
public TransactionReceipt TransactionReceipt { get; }
public static void Throw(TransactionReceipt transactionReceipt) => throw new TransactionRejectedException(transactionReceipt);
}
}
@@ -0,0 +1,16 @@
using System;
using System.Collections.Generic;
using System.Text;
using Nethereum.RPC.Eth.DTOs;
using AdvancedAlgos.AlgoErc20Token.EthClientExtensions.Exceptions;
namespace AdvancedAlgos.AlgoErc20Token.EthClientExtensions.Extensions
{
public static class TransactionReceiptExtensions
{
public static void EnsureSucceededStatus(this TransactionReceipt transactionReceipt)
{
if (transactionReceipt.Status.Value != 1) TransactionRejectedException.Throw(transactionReceipt);
}
}
}
@@ -0,0 +1,20 @@
using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Text;
namespace AdvancedAlgos.AlgoErc20Token.EthClientExtensions.Reflection
{
public static class AssemblyExtensions
{
public static string GetResourceString(this Assembly assembly, string resourceName, Encoding encoding = null)
{
using (var stream = assembly.GetManifestResourceStream(assembly.GetName().Name + "." + resourceName))
using (var reader = new StreamReader(stream, encoding ?? Encoding.UTF8))
{
return reader.ReadToEnd();
}
}
}
}
@@ -0,0 +1,97 @@
using System;
using System.Numerics;
using System.Threading.Tasks;
using AdvancedAlgos.AlgoErc20Token.EthClientExtensions.Extensions;
using AdvancedAlgos.AlgoErc20Token.EthClientExtensions.Reflection;
using Nethereum.Contracts;
using Nethereum.Hex.HexTypes;
using Nethereum.RPC.Eth.DTOs;
using Nethereum.Web3;
namespace AdvancedAlgos.AlgoErc20Token.EthClientExtensions
{
public abstract class SmartContract<TContract> where TContract : SmartContract<TContract>, new()
{
private static readonly object _syncForResourceLoader = new object();
private static string _abi;
private static string _bin;
public Web3 Web3 { get; private set; }
public string ContractAddress { get; private set; }
protected abstract string AbiResourceName { get; }
protected abstract string BinResourceName { get; }
protected abstract BigInteger DeploymentGasUnits { get; }
protected virtual void Initialize(Contract contractDescriptor) { }
public static TContract Get(Web3 web3, string contractAddress)
{
var contractInstance = new TContract();
contractInstance.LoadAbiAndBin();
contractInstance.Web3 = web3;
contractInstance.ContractAddress = contractAddress;
var contractDescriptor = web3.Eth.GetContract(_abi, contractAddress);
contractInstance.Initialize(contractDescriptor);
return contractInstance;
}
public async Task<TransactionReceipt> DeployAsync(Web3 web3, BigInteger gasPrice, params object[] constructorParameters)
{
LoadAbiAndBin();
var transactionReceipt = await web3.Eth.DeployContract.SendRequestAndWaitForReceiptAsync(
_abi,
_bin,
web3.TransactionManager.Account.Address,
new HexBigInteger(DeploymentGasUnits),
new HexBigInteger(gasPrice),
null,
null,
constructorParameters);
transactionReceipt.EnsureSucceededStatus();
var contractDescriptor = web3.Eth.GetContract(_abi, transactionReceipt.ContractAddress);
Initialize(contractDescriptor);
Web3 = web3;
ContractAddress = transactionReceipt.ContractAddress;
return transactionReceipt;
}
protected async Task<TransactionReceipt> InvokeAsync(Function function, BigInteger gasUnits, BigInteger gasPrice, params object[] parameters)
{
var transactionReceipt = await function.SendTransactionAndWaitForReceiptAsync(
Web3.TransactionManager.Account.Address,
new HexBigInteger(gasUnits),
new HexBigInteger(gasPrice),
null,
null,
parameters);
transactionReceipt.EnsureSucceededStatus();
return transactionReceipt;
}
private void LoadAbiAndBin()
{
lock (_syncForResourceLoader)
{
if (_abi != null) return;
_abi = GetType().Assembly.GetResourceString(AbiResourceName);
_bin = GetType().Assembly.GetResourceString(BinResourceName);
}
}
}
}
@@ -0,0 +1,23 @@
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</PropertyGroup>
<ItemGroup>
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</ItemGroup>
<ItemGroup>
<Folder Include="SmartContracts\src\bin\" />
</ItemGroup>
<ItemGroup>
<EmbeddedResource Include="SmartContracts\src\bin\*.*" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\AdvancedAlgos.AlgoErc20Token.EthClientExtensions\AdvancedAlgos.AlgoErc20Token.EthClientExtensions.csproj" />
</ItemGroup>
</Project>
@@ -0,0 +1,25 @@
#pragma warning disable EPS02 // Non-readonly struct used as in-parameter
using System;
using System.Collections.Generic;
using System.Numerics;
using System.Text;
namespace AdvancedAlgos.AlgoErc20Token
{
public static class AlgoIntegralConverterExtensions
{
public const byte TOKEN_DECIMALS = 18;
public static readonly BigInteger TokenFactor = BigInteger.Pow(10, TOKEN_DECIMALS);
public static BigInteger Algo(this in byte value) => value * TokenFactor;
public static BigInteger Algo(this in sbyte value) => value * TokenFactor;
public static BigInteger Algo(this in short value) => value * TokenFactor;
public static BigInteger Algo(this in ushort value) => value * TokenFactor;
public static BigInteger Algo(this in int value) => value * TokenFactor;
public static BigInteger Algo(this in uint value) => value * TokenFactor;
public static BigInteger Algo(this in long value) => value * TokenFactor;
public static BigInteger Algo(this in ulong value) => value * TokenFactor;
}
}
@@ -0,0 +1,16 @@
using System;
using System.Numerics;
using System.Threading.Tasks;
using AdvancedAlgos.AlgoErc20Token.EthClientExtensions;
using Nethereum.Contracts;
using Nethereum.RPC.Eth.DTOs;
namespace AdvancedAlgos.AlgoErc20Token
{
public class AlgoTokenV1 : Erc20Token<AlgoTokenV1>
{
protected override string AbiResourceName => $"SmartContracts.src.bin.{nameof(AlgoTokenV1)}.abi";
protected override string BinResourceName => $"SmartContracts.src.bin.{nameof(AlgoTokenV1)}.bin";
protected override BigInteger DeploymentGasUnits => 1200000;
}
}
@@ -0,0 +1,40 @@
using System;
using System.Collections.Generic;
using System.Numerics;
using System.Text;
using System.Threading.Tasks;
using AdvancedAlgos.AlgoErc20Token.EthClientExtensions;
using Nethereum.Contracts;
using Nethereum.RPC.Eth.DTOs;
namespace AdvancedAlgos.AlgoErc20Token
{
public abstract class Erc20Token<TContract> : SmartContract<TContract>
where TContract : SmartContract<TContract>, new()
{
private Function _transfer;
private Function _balanceOf;
private Function _pause;
private Function _unpause;
protected override void Initialize(Contract contractDescriptor)
{
_transfer = contractDescriptor.GetFunction("transfer");
_balanceOf = contractDescriptor.GetFunction("balanceOf");
_pause = contractDescriptor.GetFunction("pause");
_unpause = contractDescriptor.GetFunction("unpause");
}
public Task<TransactionReceipt> TransferAsync(BigInteger gasPrice, string to, BigInteger value) =>
InvokeAsync(_transfer, 900000, gasPrice, to, value);
public Task<BigInteger> BalanceOfAsync(string owner) =>
_balanceOf.CallAsync<BigInteger>(owner);
public Task<TransactionReceipt> PauseAsync(BigInteger gasPrice) =>
InvokeAsync(_pause, 900000, gasPrice);
public Task<TransactionReceipt> UnpauseAsync(BigInteger gasPrice) =>
InvokeAsync(_unpause, 900000, gasPrice);
}
}
@@ -0,0 +1,17 @@
pragma solidity ^0.4.24;
import "./openzeppelin-solidity/contracts/token/ERC20/ERC20Detailed.sol";
import "./openzeppelin-solidity/contracts/token/ERC20/ERC20Pausable.sol";
contract AlgoTokenV1 is ERC20, ERC20Detailed, ERC20Pausable {
uint256 public constant INITIAL_SUPPLY = 1000000000 * (10 ** uint256(18));
constructor()
ERC20Pausable()
ERC20Detailed("Algos", "ALGO", 18)
public
{
_mint(msg.sender, INITIAL_SUPPLY);
}
}
@@ -0,0 +1 @@
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@@ -0,0 +1 @@
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truncated
}
@@ -0,0 +1,27 @@
## 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 inheritance 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.
@@ -0,0 +1,44 @@
pragma solidity ^0.4.24;
/**
* @title Roles
* @dev Library for managing addresses assigned to a Role.
*/
library Roles {
struct Role {
mapping (address => bool) bearer;
}
/**
* @dev give an account access to this role
*/
function add(Role storage role, address account) internal {
require(account != address(0));
require(!has(role, account));
role.bearer[account] = true;
}
/**
* @dev remove an account's access to this role
*/
function remove(Role storage role, address account) internal {
require(account != address(0));
require(has(role, account));
role.bearer[account] = false;
}
/**
* @dev check if an account has this role
* @return bool
*/
function has(Role storage role, address account)
internal
view
returns (bool)
{
require(account != address(0));
return role.bearer[account];
}
}
@@ -0,0 +1,43 @@
pragma solidity ^0.4.24;
import "../Roles.sol";
contract CapperRole {
using Roles for Roles.Role;
event CapperAdded(address indexed account);
event CapperRemoved(address indexed account);
Roles.Role private cappers;
constructor() internal {
_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);
}
}
@@ -0,0 +1,43 @@
pragma solidity ^0.4.24;
import "../Roles.sol";
contract MinterRole {
using Roles for Roles.Role;
event MinterAdded(address indexed account);
event MinterRemoved(address indexed account);
Roles.Role private minters;
constructor() internal {
_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);
}
}
@@ -0,0 +1,43 @@
pragma solidity ^0.4.24;
import "../Roles.sol";
contract PauserRole {
using Roles for Roles.Role;
event PauserAdded(address indexed account);
event PauserRemoved(address indexed account);
Roles.Role private pausers;
constructor() internal {
_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);
}
}
@@ -0,0 +1,43 @@
pragma solidity ^0.4.24;
import "../Roles.sol";
contract SignerRole {
using Roles for Roles.Role;
event SignerAdded(address indexed account);
event SignerRemoved(address indexed account);
Roles.Role private signers;
constructor() internal {
_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);
}
}
@@ -0,0 +1,241 @@
pragma solidity ^0.4.24;
import "../token/ERC20/IERC20.sol";
import "../math/SafeMath.sol";
import "../token/ERC20/SafeERC20.sol";
import "../utils/ReentrancyGuard.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 ReentrancyGuard {
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
*/
constructor(uint256 rate, address wallet, IERC20 token) internal {
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***
* Note that other contracts will transfer fund with a base gas stipend
* of 2300, which is not enough to call buyTokens. Consider calling
* buyTokens directly when purchasing tokens from a contract.
*/
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 amount of wei raised.
*/
function weiRaised() public view returns (uint256) {
return _weiRaised;
}
/**
* @dev low level token purchase ***DO NOT OVERRIDE***
* This function has a non-reentrancy guard, so it shouldn't be called by
* another `nonReentrant` function.
* @param beneficiary Recipient of the token purchase
*/
function buyTokens(address beneficiary) public nonReentrant 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
view
{
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
view
{
// 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. Doesn't necessarily emit/send 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);
}
}
@@ -0,0 +1,50 @@
pragma solidity ^0.4.24;
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 TimedCrowdsale {
using SafeMath for uint256;
bool private _finalized;
event CrowdsaleFinalized();
constructor() internal {
_finalized = false;
}
/**
* @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());
_finalized = true;
_finalization();
emit CrowdsaleFinalized();
}
/**
* @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 {
}
}
@@ -0,0 +1,50 @@
pragma solidity ^0.4.24;
import "../validation/TimedCrowdsale.sol";
import "../../math/SafeMath.sol";
/**
* @title PostDeliveryCrowdsale
* @dev Crowdsale that locks tokens from withdrawal until it ends.
*/
contract PostDeliveryCrowdsale is TimedCrowdsale {
using SafeMath for uint256;
mapping(address => uint256) private _balances;
constructor() internal {}
/**
* @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);
}
}
@@ -0,0 +1,91 @@
pragma solidity ^0.4.24;
import "../../math/SafeMath.sol";
import "./FinalizableCrowdsale.sol";
import "../../payment/escrow/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.
* WARNING: note that if you allow tokens to be traded before the goal
* is met, then an attack is possible in which the attacker purchases
* tokens from the crowdsale and when they sees that the goal is
* unlikely to be met, they sell their tokens (possibly at a discount).
* The attacker will be refunded when the crowdsale is finalized, and
* the users that purchased from them will be left with worthless
* tokens. There are many possible ways to avoid this, like making the
* the crowdsale inherit from PostDeliveryCrowdsale, or imposing
* restrictions on token trading until the crowdsale is finalized.
* This is being discussed in
* https://github.com/OpenZeppelin/openzeppelin-solidity/issues/877
* This contract will be updated when we agree on a general solution
* for this problem.
*/
contract RefundableCrowdsale is 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
*/
constructor(uint256 goal) internal {
require(goal > 0);
_escrow = new RefundEscrow(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);
}
}
@@ -0,0 +1,59 @@
pragma solidity ^0.4.24;
import "../Crowdsale.sol";
import "../../token/ERC20/IERC20.sol";
import "../../token/ERC20/SafeERC20.sol";
import "../../math/SafeMath.sol";
import "../../math/Math.sol";
/**
* @title AllowanceCrowdsale
* @dev Extension of Crowdsale where tokens are held by a wallet, which approves an allowance to the crowdsale.
*/
contract AllowanceCrowdsale is 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
*/
constructor(address tokenWallet) internal {
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 Math.min(
token().balanceOf(_tokenWallet),
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);
}
}
@@ -0,0 +1,29 @@
pragma solidity ^0.4.24;
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 Crowdsale {
constructor() internal {}
/**
* @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));
}
}
@@ -0,0 +1,81 @@
pragma solidity ^0.4.24;
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 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
*/
constructor(uint256 initialRate, uint256 finalRate) internal {
require(finalRate > 0);
require(initialRate > finalRate);
_initialRate = initialRate;
_finalRate = finalRate;
}
/**
* The base rate function is overridden to revert, since this crowdsale doens't use it, and
* all calls to it are a mistake.
*/
function rate() public view returns(uint256) {
revert();
}
/**
* @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) {
if (!isOpen()) {
return 0;
}
// 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);
}
}
@@ -0,0 +1,55 @@
pragma solidity ^0.4.24;
import "../../math/SafeMath.sol";
import "../Crowdsale.sol";
/**
* @title CappedCrowdsale
* @dev Crowdsale with a limit for total contributions.
*/
contract CappedCrowdsale is 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
*/
constructor(uint256 cap) internal {
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
view
{
super._preValidatePurchase(beneficiary, weiAmount);
require(weiRaised().add(weiAmount) <= _cap);
}
}
@@ -0,0 +1,81 @@
pragma solidity ^0.4.24;
import "../../math/SafeMath.sol";
import "../Crowdsale.sol";
import "../../access/roles/CapperRole.sol";
/**
* @title IndividuallyCappedCrowdsale
* @dev Crowdsale with per-beneficiary caps.
*/
contract IndividuallyCappedCrowdsale is Crowdsale, CapperRole {
using SafeMath for uint256;
mapping(address => uint256) private _contributions;
mapping(address => uint256) private _caps;
constructor() internal {}
/**
* @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
view
{
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);
}
}
@@ -0,0 +1,85 @@
pragma solidity ^0.4.24;
import "../../math/SafeMath.sol";
import "../Crowdsale.sol";
/**
* @title TimedCrowdsale
* @dev Crowdsale accepting contributions only within a time frame.
*/
contract TimedCrowdsale is 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
*/
constructor(uint256 openingTime, uint256 closingTime) internal {
// 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
view
{
super._preValidatePurchase(beneficiary, weiAmount);
}
}
@@ -0,0 +1,71 @@
pragma solidity ^0.4.24;
/**
* @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 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 signature bytes signature, the signature is generated using web3.eth.sign()
*/
function recover(bytes32 hash, bytes signature)
internal
pure
returns (address)
{
bytes32 r;
bytes32 s;
uint8 v;
// Check the signature length
if (signature.length != 65) {
return (address(0));
}
// Divide the signature in r, s and v variables
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
// solium-disable-next-line security/no-inline-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
// Version of signature should be 27 or 28, but 0 and 1 are also possible versions
if (v < 27) {
v += 27;
}
// If the version is correct return the signer address
if (v != 27 && v != 28) {
return (address(0));
} else {
// solium-disable-next-line arg-overflow
return ecrecover(hash, v, r, s);
}
}
/**
* toEthSignedMessageHash
* @dev prefix a bytes32 value with "\x19Ethereum Signed Message:"
* and hash the result
*/
function toEthSignedMessageHash(bytes32 hash)
internal
pure
returns (bytes32)
{
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(
abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)
);
}
}
@@ -0,0 +1,42 @@
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;
}
}
@@ -0,0 +1,28 @@
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;
}
}
@@ -0,0 +1,27 @@
pragma solidity ^0.4.24;
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 IERC20 {
function tokenURI() external view returns (string);
}
contract ERC20WithMetadata is ERC20TokenMetadata {
string private _tokenURI;
constructor(string tokenURI)
public
{
_tokenURI = tokenURI;
}
function tokenURI() external view returns (string) {
return _tokenURI;
}
}
@@ -0,0 +1,100 @@
pragma solidity ^0.4.24;
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 {
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
*/
constructor(IERC20 legacyToken) public {
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);
}
}
@@ -0,0 +1,146 @@
pragma solidity ^0.4.24;
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.
* Note that SignatureBouncer offers no protection against replay attacks, users
* must add this themselves!
*
* 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 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;
constructor() internal {}
/**
* @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));
_;
}
/**
* @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);
}
}
@@ -0,0 +1,175 @@
/* solium-disable security/no-block-members */
pragma solidity ^0.4.24;
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 Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
event TokensReleased(address token, uint256 amount);
event TokenVestingRevoked(address token);
// 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
*/
constructor(
address beneficiary,
uint256 start,
uint256 cliffDuration,
uint256 duration,
bool revocable
)
public
{
require(beneficiary != address(0));
require(cliffDuration <= duration);
require(duration > 0);
require(start.add(duration) > block.timestamp);
_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 TokensReleased(token, 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 TokenVestingRevoked(token);
}
/**
* @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) private 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) private 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);
}
}
}
@@ -0,0 +1,57 @@
pragma solidity ^0.4.24;
import "../crowdsale/validation/CappedCrowdsale.sol";
import "../crowdsale/distribution/RefundableCrowdsale.sol";
import "../crowdsale/emission/MintedCrowdsale.sol";
import "../token/ERC20/ERC20Mintable.sol";
import "../token/ERC20/ERC20Detailed.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 ERC20Mintable, ERC20Detailed {
constructor() public ERC20Detailed("Sample Crowdsale Token", "SCT", 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
* MintedCrowdsale - assumes the token can be minted by the crowdsale, which does so
* when receiving purchases.
*
* 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 CappedCrowdsale, RefundableCrowdsale, MintedCrowdsale {
constructor(
uint256 openingTime,
uint256 closingTime,
uint256 rate,
address wallet,
uint256 cap,
ERC20Mintable token,
uint256 goal
)
public
Crowdsale(rate, wallet, token)
CappedCrowdsale(cap)
TimedCrowdsale(openingTime, closingTime)
RefundableCrowdsale(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);
}
}
@@ -0,0 +1,26 @@
pragma solidity ^0.4.24;
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 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.
*/
constructor() public {
_mint(msg.sender, INITIAL_SUPPLY);
}
}
@@ -0,0 +1,53 @@
pragma solidity ^0.4.24;
import "./IERC165.sol";
/**
* @title ERC165
* @author Matt Condon (@shrugs)
* @dev Implements ERC165 using a lookup table.
*/
contract ERC165 is 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) private _supportedInterfaces;
/**
* @dev A contract implementing SupportsInterfaceWithLookup
* implement ERC165 itself
*/
constructor()
internal
{
_registerInterface(_InterfaceId_ERC165);
}
/**
* @dev implement supportsInterface(bytes4) using a lookup table
*/
function supportsInterface(bytes4 interfaceId)
external
view
returns (bool)
{
return _supportedInterfaces[interfaceId];
}
/**
* @dev internal method for registering an interface
*/
function _registerInterface(bytes4 interfaceId)
internal
{
require(interfaceId != 0xffffffff);
_supportedInterfaces[interfaceId] = true;
}
}
@@ -0,0 +1,146 @@
pragma solidity ^0.4.24;
/**
* @title ERC165Checker
* @dev Use `using ERC165Checker for address`; to include this library
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md
*/
library ERC165Checker {
// As per the EIP-165 spec, no interface should ever match 0xffffffff
bytes4 private constant _InterfaceId_Invalid = 0xffffffff;
bytes4 private constant _InterfaceId_ERC165 = 0x01ffc9a7;
/**
* 0x01ffc9a7 ===
* bytes4(keccak256('supportsInterface(bytes4)'))
*/
/**
* @notice Query if a contract supports ERC165
* @param account The address of the contract to query for support of ERC165
* @return true if the contract at account implements ERC165
*/
function _supportsERC165(address account)
internal
view
returns (bool)
{
// Any contract that implements ERC165 must explicitly indicate support of
// InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
return _supportsERC165Interface(account, _InterfaceId_ERC165) &&
!_supportsERC165Interface(account, _InterfaceId_Invalid);
}
/**
* @notice Query if a contract implements an interface, also checks support of ERC165
* @param account The address of the contract to query for support of an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @return true if the contract at account indicates support of the interface with
* identifier interfaceId, false otherwise
* @dev Interface identification is specified in ERC-165.
*/
function _supportsInterface(address account, bytes4 interfaceId)
internal
view
returns (bool)
{
// query support of both ERC165 as per the spec and support of _interfaceId
return _supportsERC165(account) &&
_supportsERC165Interface(account, interfaceId);
}
/**
* @notice Query if a contract implements interfaces, also checks support of ERC165
* @param account The address of the contract to query for support of an interface
* @param interfaceIds A list of interface identifiers, as specified in ERC-165
* @return true if the contract at account indicates support all interfaces in the
* interfaceIds list, false otherwise
* @dev Interface identification is specified in ERC-165.
*/
function _supportsAllInterfaces(address account, bytes4[] interfaceIds)
internal
view
returns (bool)
{
// query support of ERC165 itself
if (!_supportsERC165(account)) {
return false;
}
// query support of each interface in _interfaceIds
for (uint256 i = 0; i < interfaceIds.length; i++) {
if (!_supportsERC165Interface(account, interfaceIds[i])) {
return false;
}
}
// all interfaces supported
return true;
}
/**
* @notice Query if a contract implements an interface, does not check ERC165 support
* @param account The address of the contract to query for support of an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @return true if the contract at account indicates support of the interface with
* identifier interfaceId, false otherwise
* @dev Assumes that account contains a contract that supports ERC165, otherwise
* the behavior of this method is undefined. This precondition can be checked
* with the `supportsERC165` method in this library.
* Interface identification is specified in ERC-165.
*/
function _supportsERC165Interface(address account, bytes4 interfaceId)
private
view
returns (bool)
{
// success determines whether the staticcall succeeded and result determines
// whether the contract at account indicates support of _interfaceId
(bool success, bool result) = _callERC165SupportsInterface(
account, interfaceId);
return (success && result);
}
/**
* @notice Calls the function with selector 0x01ffc9a7 (ERC165) and suppresses throw
* @param account The address of the contract to query for support of an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @return success true if the STATICCALL succeeded, false otherwise
* @return result true if the STATICCALL succeeded and the contract at account
* indicates support of the interface with identifier interfaceId, false otherwise
*/
function _callERC165SupportsInterface(
address account,
bytes4 interfaceId
)
private
view
returns (bool success, bool result)
{
bytes memory encodedParams = abi.encodeWithSelector(
_InterfaceId_ERC165,
interfaceId
);
// solium-disable-next-line security/no-inline-assembly
assembly {
let encodedParams_data := add(0x20, encodedParams)
let encodedParams_size := mload(encodedParams)
let output := mload(0x40) // Find empty storage location using "free memory pointer"
mstore(output, 0x0)
success := staticcall(
30000, // 30k gas
account, // To addr
encodedParams_data,
encodedParams_size,
output,
0x20 // Outputs are 32 bytes long
)
result := mload(output) // Load the result
}
}
}
@@ -0,0 +1,19 @@
pragma solidity ^0.4.24;
/**
* @title IERC165
* @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md
*/
interface IERC165 {
/**
* @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.
*/
function supportsInterface(bytes4 interfaceId)
external
view
returns (bool);
}
@@ -0,0 +1,57 @@
pragma solidity ^0.4.24;
import "../access/roles/PauserRole.sol";
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is PauserRole {
event Paused(address account);
event Unpaused(address account);
bool private _paused;
constructor() internal {
_paused = false;
}
/**
* @return true if the contract is paused, false otherwise.
*/
function paused() public view returns(bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!_paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(_paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyPauser whenNotPaused {
_paused = true;
emit Paused(msg.sender);
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyPauser whenPaused {
_paused = false;
emit Unpaused(msg.sender);
}
}
@@ -0,0 +1,31 @@
pragma solidity ^0.4.24;
/**
* @title Math
* @dev Assorted math operations
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Calculates the average of two numbers. Since these are integers,
* averages of an even and odd number cannot be represented, and will be
* rounded down.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
@@ -0,0 +1,65 @@
pragma solidity ^0.4.24;
/**
* @title SafeMath
* @dev Math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, reverts on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers truncating the quotient, reverts on division by zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0); // Solidity only automatically asserts when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;
return c;
}
/**
* @dev Adds two numbers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
/**
* @dev Divides two numbers and returns the remainder (unsigned integer modulo),
* reverts when dividing by zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}
@@ -0,0 +1,14 @@
pragma solidity ^0.4.24;
import "../utils/Address.sol";
contract AddressImpl {
function isContract(address account)
external
view
returns (bool)
{
return Address.isContract(account);
}
}
@@ -0,0 +1,20 @@
pragma solidity ^0.4.24;
import "../token/ERC20/IERC20.sol";
import "../crowdsale/emission/AllowanceCrowdsale.sol";
contract AllowanceCrowdsaleImpl is AllowanceCrowdsale {
constructor (
uint256 rate,
address wallet,
IERC20 token,
address tokenWallet
)
public
Crowdsale(rate, wallet, token)
AllowanceCrowdsale(tokenWallet)
{
}
}
@@ -0,0 +1,18 @@
pragma solidity ^0.4.24;
import "../utils/Arrays.sol";
contract ArraysImpl {
using Arrays for uint256[];
uint256[] private array;
constructor(uint256[] _array) public {
array = _array;
}
function findUpperBound(uint256 _element) external view returns (uint256) {
return array.findUpperBound(_element);
}
}
@@ -0,0 +1,20 @@
pragma solidity ^0.4.24;
import "../token/ERC20/IERC20.sol";
import "../crowdsale/validation/CappedCrowdsale.sol";
contract CappedCrowdsaleImpl is CappedCrowdsale {
constructor (
uint256 rate,
address wallet,
IERC20 token,
uint256 cap
)
public
Crowdsale(rate, wallet, token)
CappedCrowdsale(cap)
{
}
}
@@ -0,0 +1,17 @@
pragma solidity ^0.4.24;
import "../access/roles/CapperRole.sol";
contract CapperRoleMock is CapperRole {
function removeCapper(address account) public {
_removeCapper(account);
}
function onlyCapperMock() public view onlyCapper {
}
// Causes a compilation error if super._removeCapper is not internal
function _removeCapper(address account) internal {
super._removeCapper(account);
}
}
@@ -0,0 +1,16 @@
pragma solidity ^0.4.24;
import "../payment/escrow/ConditionalEscrow.sol";
// mock class using ConditionalEscrow
contract ConditionalEscrowMock is ConditionalEscrow {
mapping(address => bool) private _allowed;
function setAllowed(address payee, bool allowed) public {
_allowed[payee] = allowed;
}
function withdrawalAllowed(address payee) public view returns (bool) {
return _allowed[payee];
}
}
@@ -0,0 +1,20 @@
pragma solidity ^0.4.24;
import "../drafts/Counter.sol";
contract CounterImpl {
using Counter for Counter.Counter;
uint256 public theId;
// use whatever key you want to track your counters
mapping(string => Counter.Counter) private _counters;
function doThing(string key)
public
returns (uint256)
{
theId = _counters[key].next();
return theId;
}
}
@@ -0,0 +1,9 @@
pragma solidity ^0.4.24;
import "../crowdsale/Crowdsale.sol";
contract CrowdsaleMock is Crowdsale {
constructor(uint256 rate, address wallet, IERC20 token) public
Crowdsale(rate, wallet, token) {
}
}
@@ -0,0 +1,15 @@
pragma solidity ^0.4.24;
import "../token/ERC20/ERC20.sol";
import "../token/ERC20/ERC20Detailed.sol";
contract ERC20DetailedMock is ERC20, ERC20Detailed {
constructor(
string name,
string symbol,
uint8 decimals
)
ERC20Detailed(name, symbol, decimals)
public
{}
}
@@ -0,0 +1,23 @@
pragma solidity ^0.4.24;
import "../cryptography/ECDSA.sol";
contract ECDSAMock {
using ECDSA for bytes32;
function recover(bytes32 hash, bytes signature)
public
pure
returns (address)
{
return hash.recover(signature);
}
function toEthSignedMessageHash(bytes32 hash)
public
pure
returns (bytes32)
{
return hash.toEthSignedMessageHash();
}
}
@@ -0,0 +1,66 @@
pragma solidity ^0.4.24;
import "../../introspection/IERC165.sol";
/**
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-214.md#specification
* > Any attempts to make state-changing operations inside an execution instance with STATIC set to true will instead throw an exception.
* > These operations include [...], LOG0, LOG1, LOG2, [...]
*
* therefore, because this contract is staticcall'd we need to not emit events (which is how solidity-coverage works)
* solidity-coverage ignores the /mocks folder, so we duplicate its implementation here to avoid instrumenting it
*/
contract SupportsInterfaceWithLookupMock is IERC165 {
bytes4 public 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) private _supportedInterfaces;
/**
* @dev A contract implementing SupportsInterfaceWithLookup
* implement ERC165 itself
*/
constructor()
public
{
_registerInterface(InterfaceId_ERC165);
}
/**
* @dev implement supportsInterface(bytes4) using a lookup table
*/
function supportsInterface(bytes4 interfaceId)
external
view
returns (bool)
{
return _supportedInterfaces[interfaceId];
}
/**
* @dev private method for registering an interface
*/
function _registerInterface(bytes4 interfaceId)
internal
{
require(interfaceId != 0xffffffff);
_supportedInterfaces[interfaceId] = true;
}
}
contract ERC165InterfacesSupported is SupportsInterfaceWithLookupMock {
constructor (bytes4[] interfaceIds)
public
{
for (uint256 i = 0; i < interfaceIds.length; i++) {
_registerInterface(interfaceIds[i]);
}
}
}
@@ -0,0 +1,5 @@
pragma solidity ^0.4.24;
contract ERC165NotSupported {
}
@@ -0,0 +1,31 @@
pragma solidity ^0.4.24;
import "../introspection/ERC165Checker.sol";
contract ERC165CheckerMock {
using ERC165Checker for address;
function supportsERC165(address account)
public
view
returns (bool)
{
return account._supportsERC165();
}
function supportsInterface(address account, bytes4 interfaceId)
public
view
returns (bool)
{
return account._supportsInterface(interfaceId);
}
function supportsAllInterfaces(address account, bytes4[] interfaceIds)
public
view
returns (bool)
{
return account._supportsAllInterfaces(interfaceIds);
}
}
@@ -0,0 +1,11 @@
pragma solidity ^0.4.24;
import "../introspection/ERC165.sol";
contract ERC165Mock is ERC165 {
function registerInterface(bytes4 interfaceId)
public
{
_registerInterface(interfaceId);
}
}
@@ -0,0 +1,11 @@
pragma solidity ^0.4.24;
import "../token/ERC20/ERC20Burnable.sol";
contract ERC20BurnableMock is ERC20Burnable {
constructor(address initialAccount, uint256 initialBalance) public {
_mint(initialAccount, initialBalance);
}
}
@@ -0,0 +1,7 @@
pragma solidity ^0.4.24;
import "../token/ERC20/ERC20Mintable.sol";
import "./MinterRoleMock.sol";
contract ERC20MintableMock is ERC20Mintable, MinterRoleMock {
}
@@ -0,0 +1,24 @@
pragma solidity ^0.4.24;
import "../token/ERC20/ERC20.sol";
// mock class using ERC20
contract ERC20Mock is ERC20 {
constructor(address initialAccount, uint256 initialBalance) public {
_mint(initialAccount, initialBalance);
}
function mint(address account, uint256 amount) public {
_mint(account, amount);
}
function burn(address account, uint256 amount) public {
_burn(account, amount);
}
function burnFrom(address account, uint256 amount) public {
_burnFrom(account, amount);
}
}
@@ -0,0 +1,13 @@
pragma solidity ^0.4.24;
import "../token/ERC20/ERC20Pausable.sol";
import "./PauserRoleMock.sol";
// mock class using ERC20Pausable
contract ERC20PausableMock is ERC20Pausable, PauserRoleMock {
constructor(address initialAccount, uint initialBalance) public {
_mint(initialAccount, initialBalance);
}
}
@@ -0,0 +1,11 @@
pragma solidity ^0.4.24;
import "../token/ERC20/ERC20.sol";
import "../drafts/ERC1046/TokenMetadata.sol";
contract ERC20WithMetadataMock is ERC20, ERC20WithMetadata {
constructor(string tokenURI) public
ERC20WithMetadata(tokenURI)
{
}
}
@@ -0,0 +1,32 @@
pragma solidity ^0.4.24;
import "../token/ERC721/ERC721Full.sol";
import "../token/ERC721/ERC721Mintable.sol";
import "../token/ERC721/ERC721MetadataMintable.sol";
import "../token/ERC721/ERC721Burnable.sol";
/**
* @title ERC721FullMock
* This mock just provides a public mint and burn functions for testing purposes,
* and a public setter for metadata URI
*/
contract ERC721FullMock
is ERC721Full, ERC721Mintable, ERC721MetadataMintable, ERC721Burnable {
constructor(string name, string symbol) public
ERC721Mintable()
ERC721Full(name, symbol)
{}
function exists(uint256 tokenId) public view returns (bool) {
return _exists(tokenId);
}
function setTokenURI(uint256 tokenId, string uri) public {
_setTokenURI(tokenId, uri);
}
function removeTokenFrom(address from, uint256 tokenId) public {
_removeTokenFrom(from, tokenId);
}
}
@@ -0,0 +1,20 @@
pragma solidity ^0.4.24;
import "../token/ERC721/ERC721Full.sol";
import "../token/ERC721/ERC721Mintable.sol";
import "../token/ERC721/ERC721MetadataMintable.sol";
import "../token/ERC721/ERC721Burnable.sol";
/**
* @title ERC721MintableBurnableImpl
*/
contract ERC721MintableBurnableImpl
is ERC721Full, ERC721Mintable, ERC721MetadataMintable, ERC721Burnable {
constructor()
ERC721Mintable()
ERC721Full("Test", "TEST")
public
{
}
}
@@ -0,0 +1,17 @@
pragma solidity ^0.4.24;
import "../token/ERC721/ERC721.sol";
/**
* @title ERC721Mock
* This mock just provides a public mint and burn functions for testing purposes
*/
contract ERC721Mock is ERC721 {
function mint(address to, uint256 tokenId) public {
_mint(to, tokenId);
}
function burn(uint256 tokenId) public {
_burn(ownerOf(tokenId), tokenId);
}
}
@@ -0,0 +1,22 @@
pragma solidity ^0.4.24;
import "../token/ERC721/ERC721Pausable.sol";
import "./PauserRoleMock.sol";
/**
* @title ERC721PausableMock
* This mock just provides a public mint, burn and exists functions for testing purposes
*/
contract ERC721PausableMock is ERC721Pausable, PauserRoleMock {
function mint(address to, uint256 tokenId) public {
super._mint(to, tokenId);
}
function burn(uint256 tokenId) public {
super._burn(ownerOf(tokenId), tokenId);
}
function exists(uint256 tokenId) public view returns (bool) {
return super._exists(tokenId);
}
}
@@ -0,0 +1,41 @@
pragma solidity ^0.4.24;
import "../token/ERC721/IERC721Receiver.sol";
contract ERC721ReceiverMock is IERC721Receiver {
bytes4 private _retval;
bool private _reverts;
event Received(
address operator,
address from,
uint256 tokenId,
bytes data,
uint256 gas
);
constructor(bytes4 retval, bool reverts) public {
_retval = retval;
_reverts = reverts;
}
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes data
)
public
returns(bytes4)
{
require(!_reverts);
emit Received(
operator,
from,
tokenId,
data,
gasleft() // msg.gas was deprecated in solidityv0.4.21
);
return _retval;
}
}
@@ -0,0 +1,62 @@
pragma solidity ^0.4.24;
contract EventEmitter {
event Argumentless();
event ShortUint(uint8 value);
event ShortInt(int8 value);
event LongUint(uint256 value);
event LongInt(int256 value);
event Address(address value);
event Boolean(bool value);
event String(string value);
event LongUintBooleanString(
uint256 uintValue,
bool booleanValue,
string stringValue
);
function emitArgumentless() public {
emit Argumentless();
}
function emitShortUint(uint8 value) public {
emit ShortUint(value);
}
function emitShortInt(int8 value) public {
emit ShortInt(value);
}
function emitLongUint(uint256 value) public {
emit LongUint(value);
}
function emitLongInt(int256 value) public {
emit LongInt(value);
}
function emitAddress(address value) public {
emit Address(value);
}
function emitBoolean(bool value) public {
emit Boolean(value);
}
function emitString(string value) public {
emit String(value);
}
function emitLongUintBooleanString(
uint256 uintValue,
bool booleanValue,
string stringValue)
public {
emit LongUintBooleanString(uintValue, booleanValue, stringValue);
}
function emitLongUintAndBoolean(uint256 uintValue, bool boolValue) public {
emit LongUint(uintValue);
emit Boolean(boolValue);
}
}
@@ -0,0 +1,21 @@
pragma solidity ^0.4.24;
import "../token/ERC20/IERC20.sol";
import "../crowdsale/distribution/FinalizableCrowdsale.sol";
contract FinalizableCrowdsaleImpl is FinalizableCrowdsale {
constructor (
uint256 openingTime,
uint256 closingTime,
uint256 rate,
address wallet,
IERC20 token
)
public
Crowdsale(rate, wallet, token)
TimedCrowdsale(openingTime, closingTime)
{
}
}
@@ -0,0 +1,23 @@
pragma solidity ^0.4.24;
import "../crowdsale/price/IncreasingPriceCrowdsale.sol";
import "../math/SafeMath.sol";
contract IncreasingPriceCrowdsaleImpl is IncreasingPriceCrowdsale {
constructor (
uint256 openingTime,
uint256 closingTime,
address wallet,
IERC20 token,
uint256 initialRate,
uint256 finalRate
)
public
Crowdsale(initialRate, wallet, token)
TimedCrowdsale(openingTime, closingTime)
IncreasingPriceCrowdsale(initialRate, finalRate)
{
}
}
@@ -0,0 +1,19 @@
pragma solidity ^0.4.24;
import "../token/ERC20/IERC20.sol";
import "../crowdsale/validation/IndividuallyCappedCrowdsale.sol";
import "./CapperRoleMock.sol";
contract IndividuallyCappedCrowdsaleImpl
is IndividuallyCappedCrowdsale, CapperRoleMock {
constructor(
uint256 rate,
address wallet,
IERC20 token
)
public
Crowdsale(rate, wallet, token)
{
}
}
@@ -0,0 +1,17 @@
pragma solidity ^0.4.24;
import "../math/Math.sol";
contract MathMock {
function max(uint256 a, uint256 b) public pure returns (uint256) {
return Math.max(a, b);
}
function min(uint256 a, uint256 b) public pure returns (uint256) {
return Math.min(a, b);
}
function average(uint256 a, uint256 b) public pure returns (uint256) {
return Math.average(a, b);
}
}
@@ -0,0 +1,18 @@
pragma solidity ^0.4.24;
import { MerkleProof } from "../cryptography/MerkleProof.sol";
contract MerkleProofWrapper {
function verify(
bytes32[] proof,
bytes32 root,
bytes32 leaf
)
public
pure
returns (bool)
{
return MerkleProof.verify(proof, root, leaf);
}
}
@@ -0,0 +1,18 @@
pragma solidity ^0.4.24;
import "../token/ERC20/ERC20Mintable.sol";
import "../crowdsale/emission/MintedCrowdsale.sol";
contract MintedCrowdsaleImpl is MintedCrowdsale {
constructor (
uint256 rate,
address wallet,
ERC20Mintable token
)
public
Crowdsale(rate, wallet, token)
{
}
}
@@ -0,0 +1,17 @@
pragma solidity ^0.4.24;
import "../access/roles/MinterRole.sol";
contract MinterRoleMock is MinterRole {
function removeMinter(address account) public {
_removeMinter(account);
}
function onlyMinterMock() public view onlyMinter {
}
// Causes a compilation error if super._removeMinter is not internal
function _removeMinter(address account) internal {
super._removeMinter(account);
}
}
@@ -0,0 +1,6 @@
pragma solidity ^0.4.24;
import "../ownership/Ownable.sol";
contract OwnableMock is Ownable {
}
@@ -0,0 +1,24 @@
pragma solidity ^0.4.24;
import "../lifecycle/Pausable.sol";
import "./PauserRoleMock.sol";
// mock class using Pausable
contract PausableMock is Pausable, PauserRoleMock {
bool public drasticMeasureTaken;
uint256 public count;
constructor() public {
drasticMeasureTaken = false;
count = 0;
}
function normalProcess() external whenNotPaused {
count++;
}
function drasticMeasure() external whenPaused {
drasticMeasureTaken = true;
}
}
@@ -0,0 +1,17 @@
pragma solidity ^0.4.24;
import "../access/roles/PauserRole.sol";
contract PauserRoleMock is PauserRole {
function removePauser(address account) public {
_removePauser(account);
}
function onlyPauserMock() public view onlyPauser {
}
// Causes a compilation error if super._removePauser is not internal
function _removePauser(address account) internal {
super._removePauser(account);
}
}
@@ -0,0 +1,21 @@
pragma solidity ^0.4.24;
import "../token/ERC20/IERC20.sol";
import "../crowdsale/distribution/PostDeliveryCrowdsale.sol";
contract PostDeliveryCrowdsaleImpl is PostDeliveryCrowdsale {
constructor (
uint256 openingTime,
uint256 closingTime,
uint256 rate,
address wallet,
IERC20 token
)
public
TimedCrowdsale(openingTime, closingTime)
Crowdsale(rate, wallet, token)
{
}
}
@@ -0,0 +1,15 @@
pragma solidity ^0.4.24;
import "../payment/PullPayment.sol";
// mock class using PullPayment
contract PullPaymentMock is PullPayment {
constructor() public payable { }
// test helper function to call asyncTransfer
function callTransfer(address dest, uint256 amount) public {
_asyncTransfer(dest, amount);
}
}
@@ -0,0 +1,10 @@
pragma solidity ^0.4.24;
contract ReentrancyAttack {
function callSender(bytes4 data) public {
// solium-disable-next-line security/no-low-level-calls
require(msg.sender.call(abi.encodeWithSelector(data)));
}
}
@@ -0,0 +1,44 @@
pragma solidity ^0.4.24;
import "../utils/ReentrancyGuard.sol";
import "./ReentrancyAttack.sol";
contract ReentrancyMock is ReentrancyGuard {
uint256 public counter;
constructor() public {
counter = 0;
}
function callback() external nonReentrant {
count();
}
function countLocalRecursive(uint256 n) public nonReentrant {
if (n > 0) {
count();
countLocalRecursive(n - 1);
}
}
function countThisRecursive(uint256 n) public nonReentrant {
if (n > 0) {
count();
// solium-disable-next-line security/no-low-level-calls
bool result = address(this).call(abi.encodeWithSignature("countThisRecursive(uint256)", n - 1));
require(result == true);
}
}
function countAndCall(ReentrancyAttack attacker) public nonReentrant {
count();
bytes4 func = bytes4(keccak256("callback()"));
attacker.callSender(func);
}
function count() private {
counter += 1;
}
}
@@ -0,0 +1,23 @@
pragma solidity ^0.4.24;
import "../token/ERC20/ERC20Mintable.sol";
import "../crowdsale/distribution/RefundableCrowdsale.sol";
contract RefundableCrowdsaleImpl is RefundableCrowdsale {
constructor (
uint256 openingTime,
uint256 closingTime,
uint256 rate,
address wallet,
ERC20Mintable token,
uint256 goal
)
public
Crowdsale(rate, wallet, token)
TimedCrowdsale(openingTime, closingTime)
RefundableCrowdsale(goal)
{
}
}
@@ -0,0 +1,21 @@
pragma solidity ^0.4.24;
import "../access/Roles.sol";
contract RolesMock {
using Roles for Roles.Role;
Roles.Role private dummyRole;
function add(address account) public {
dummyRole.add(account);
}
function remove(address account) public {
dummyRole.remove(account);
}
function has(address account) public view returns (bool) {
return dummyRole.has(account);
}
}
@@ -0,0 +1,112 @@
pragma solidity ^0.4.24;
import "../token/ERC20/IERC20.sol";
import "../token/ERC20/SafeERC20.sol";
contract ERC20FailingMock {
uint256 private _allowance;
function transfer(address, uint256) public returns (bool) {
return false;
}
function transferFrom(address, address, uint256) public returns (bool) {
return false;
}
function approve(address, uint256) public returns (bool) {
return false;
}
function allowance(address, address) public view returns (uint256) {
return 0;
}
}
contract ERC20SucceedingMock {
uint256 private _allowance;
function transfer(address, uint256) public returns (bool) {
return true;
}
function transferFrom(address, address, uint256) public returns (bool) {
return true;
}
function approve(address, uint256) public returns (bool) {
return true;
}
function setAllowance(uint256 allowance_) public {
_allowance = allowance_;
}
function allowance(address, address) public view returns (uint256) {
return _allowance;
}
}
contract SafeERC20Helper {
using SafeERC20 for IERC20;
IERC20 private _failing;
IERC20 private _succeeding;
constructor() public {
_failing = IERC20(new ERC20FailingMock());
_succeeding = IERC20(new ERC20SucceedingMock());
}
// Using _failing
function doFailingTransfer() public {
_failing.safeTransfer(address(0), 0);
}
function doFailingTransferFrom() public {
_failing.safeTransferFrom(address(0), address(0), 0);
}
function doFailingApprove() public {
_failing.safeApprove(address(0), 0);
}
function doFailingIncreaseAllowance() public {
_failing.safeIncreaseAllowance(address(0), 0);
}
function doFailingDecreaseAllowance() public {
_failing.safeDecreaseAllowance(address(0), 0);
}
// Using _succeeding
function doSucceedingTransfer() public {
_succeeding.safeTransfer(address(0), 0);
}
function doSucceedingTransferFrom() public {
_succeeding.safeTransferFrom(address(0), address(0), 0);
}
function doSucceedingApprove(uint256 amount) public {
_succeeding.safeApprove(address(0), amount);
}
function doSucceedingIncreaseAllowance(uint256 amount) public {
_succeeding.safeIncreaseAllowance(address(0), amount);
}
function doSucceedingDecreaseAllowance(uint256 amount) public {
_succeeding.safeDecreaseAllowance(address(0), amount);
}
function setAllowance(uint256 allowance_) public {
ERC20SucceedingMock(_succeeding).setAllowance(allowance_);
}
function allowance() public view returns (uint256) {
return _succeeding.allowance(address(0), address(0));
}
}
@@ -0,0 +1,26 @@
pragma solidity ^0.4.24;
import "../math/SafeMath.sol";
contract SafeMathMock {
function mul(uint256 a, uint256 b) public pure returns (uint256) {
return SafeMath.mul(a, b);
}
function div(uint256 a, uint256 b) public pure returns (uint256) {
return SafeMath.div(a, b);
}
function sub(uint256 a, uint256 b) public pure returns (uint256) {
return SafeMath.sub(a, b);
}
function add(uint256 a, uint256 b) public pure returns (uint256) {
return SafeMath.add(a, b);
}
function mod(uint256 a, uint256 b) public pure returns (uint256) {
return SafeMath.mod(a, b);
}
}
@@ -0,0 +1,8 @@
pragma solidity ^0.4.24;
import "../ownership/Secondary.sol";
contract SecondaryMock is Secondary {
function onlyPrimaryMock() public view onlyPrimary {
}
}
@@ -0,0 +1,73 @@
pragma solidity ^0.4.24;
import "../drafts/SignatureBouncer.sol";
import "./SignerRoleMock.sol";
contract SignatureBouncerMock is SignatureBouncer, SignerRoleMock {
function checkValidSignature(address account, bytes signature)
public
view
returns (bool)
{
return _isValidSignature(account, signature);
}
function onlyWithValidSignature(bytes signature)
public
onlyValidSignature(signature)
view
{
}
function checkValidSignatureAndMethod(address account, bytes signature)
public
view
returns (bool)
{
return _isValidSignatureAndMethod(account, signature);
}
function onlyWithValidSignatureAndMethod(bytes signature)
public
onlyValidSignatureAndMethod(signature)
view
{
}
function checkValidSignatureAndData(
address account,
bytes,
uint,
bytes signature
)
public
view
returns (bool)
{
return _isValidSignatureAndData(account, signature);
}
function onlyWithValidSignatureAndData(uint, bytes signature)
public
onlyValidSignatureAndData(signature)
view
{
}
function theWrongMethod(bytes)
public
pure
{
}
function tooShortMsgData()
public
onlyValidSignatureAndData("")
view
{
}
}
@@ -0,0 +1,17 @@
pragma solidity ^0.4.24;
import "../access/roles/SignerRole.sol";
contract SignerRoleMock is SignerRole {
function removeSigner(address account) public {
_removeSigner(account);
}
function onlySignerMock() public view onlySigner {
}
// Causes a compilation error if super._removeSigner is not internal
function _removeSigner(address account) internal {
super._removeSigner(account);
}
}
@@ -0,0 +1,21 @@
pragma solidity ^0.4.24;
import "../token/ERC20/IERC20.sol";
import "../crowdsale/validation/TimedCrowdsale.sol";
contract TimedCrowdsaleImpl is TimedCrowdsale {
constructor (
uint256 openingTime,
uint256 closingTime,
uint256 rate,
address wallet,
IERC20 token
)
public
Crowdsale(rate, wallet, token)
TimedCrowdsale(openingTime, closingTime)
{
}
}
@@ -0,0 +1,75 @@
pragma solidity ^0.4.24;
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() internal {
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @return the address of the owner.
*/
function owner() public view returns(address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner());
_;
}
/**
* @return true if `msg.sender` is the owner of the contract.
*/
function isOwner() public view returns(bool) {
return msg.sender == _owner;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0));
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
@@ -0,0 +1,46 @@
pragma solidity ^0.4.24;
/**
* @title Secondary
* @dev A Secondary contract can only be used by its primary account (the one that created it)
*/
contract Secondary {
address private _primary;
event PrimaryTransferred(
address recipient
);
/**
* @dev Sets the primary account to the one that is creating the Secondary contract.
*/
constructor() internal {
_primary = msg.sender;
emit PrimaryTransferred(_primary);
}
/**
* @dev Reverts if called from any account other than the primary.
*/
modifier onlyPrimary() {
require(msg.sender == _primary);
_;
}
/**
* @return the address of the primary.
*/
function primary() public view returns (address) {
return _primary;
}
/**
* @dev Transfers contract to a new primary.
* @param recipient The address of new primary.
*/
function transferPrimary(address recipient) public onlyPrimary {
require(recipient != address(0));
_primary = recipient;
emit PrimaryTransferred(_primary);
}
}
@@ -0,0 +1,116 @@
pragma solidity ^0.4.24;
import "../math/SafeMath.sol";
/**
* @title PaymentSplitter
* @dev This contract can be used when payments need to be received by a group
* of people and split proportionately to some number of shares they own.
*/
contract PaymentSplitter {
using SafeMath for uint256;
event PayeeAdded(address account, uint256 shares);
event PaymentReleased(address to, uint256 amount);
event PaymentReceived(address from, uint256 amount);
uint256 private _totalShares;
uint256 private _totalReleased;
mapping(address => uint256) private _shares;
mapping(address => uint256) private _released;
address[] private _payees;
/**
* @dev Constructor
*/
constructor(address[] payees, uint256[] shares) public payable {
require(payees.length == shares.length);
require(payees.length > 0);
for (uint256 i = 0; i < payees.length; i++) {
_addPayee(payees[i], shares[i]);
}
}
/**
* @dev payable fallback
*/
function () external payable {
emit PaymentReceived(msg.sender, msg.value);
}
/**
* @return the total shares of the contract.
*/
function totalShares() public view returns(uint256) {
return _totalShares;
}
/**
* @return the total amount already released.
*/
function totalReleased() public view returns(uint256) {
return _totalReleased;
}
/**
* @return the shares of an account.
*/
function shares(address account) public view returns(uint256) {
return _shares[account];
}
/**
* @return the amount already released to an account.
*/
function released(address account) public view returns(uint256) {
return _released[account];
}
/**
* @return the address of a payee.
*/
function payee(uint256 index) public view returns(address) {
return _payees[index];
}
/**
* @dev Release one of the payee's proportional payment.
* @param account Whose payments will be released.
*/
function release(address account) public {
require(_shares[account] > 0);
uint256 totalReceived = address(this).balance.add(_totalReleased);
uint256 payment = totalReceived.mul(
_shares[account]).div(
_totalShares).sub(
_released[account]
);
require(payment != 0);
_released[account] = _released[account].add(payment);
_totalReleased = _totalReleased.add(payment);
account.transfer(payment);
emit PaymentReleased(account, payment);
}
/**
* @dev Add a new payee to the contract.
* @param account The address of the payee to add.
* @param shares_ The number of shares owned by the payee.
*/
function _addPayee(address account, uint256 shares_) private {
require(account != address(0));
require(shares_ > 0);
require(_shares[account] == 0);
_payees.push(account);
_shares[account] = shares_;
_totalShares = _totalShares.add(shares_);
emit PayeeAdded(account, shares_);
}
}
@@ -0,0 +1,41 @@
pragma solidity ^0.4.24;
import "./escrow/Escrow.sol";
/**
* @title PullPayment
* @dev Base contract supporting async send for pull payments. Inherit from this
* contract and use _asyncTransfer instead of send or transfer.
*/
contract PullPayment {
Escrow private _escrow;
constructor() internal {
_escrow = new Escrow();
}
/**
* @dev Withdraw accumulated balance.
* @param payee Whose balance will be withdrawn.
*/
function withdrawPayments(address payee) public {
_escrow.withdraw(payee);
}
/**
* @dev Returns the credit owed to an address.
* @param dest The creditor's address.
*/
function payments(address dest) public view returns (uint256) {
return _escrow.depositsOf(dest);
}
/**
* @dev Called by the payer to store the sent amount as credit to be pulled.
* @param dest The destination address of the funds.
* @param amount The amount to transfer.
*/
function _asyncTransfer(address dest, uint256 amount) internal {
_escrow.deposit.value(amount)(dest);
}
}
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