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/* file: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol */ | |
pragma solidity ^0.5.0; | |
/** | |
* @title ERC20 interface | |
* @dev see https://github.com/ethereum/EIPs/issues/20 | |
*/ | |
interface IERC20 { | |
function transfer(address to, uint256 value) external returns (bool); | |
function approve(address spender, uint256 value) external returns (bool); | |
function transferFrom(address from, address to, uint256 value) external returns (bool); | |
function totalSupply() external view returns (uint256); | |
function balanceOf(address who) external view returns (uint256); | |
function allowance(address owner, address spender) external view returns (uint256); | |
event Transfer(address indexed from, address indexed to, uint256 value); | |
event Approval(address indexed owner, address indexed spender, uint256 value); | |
} | |
/* eof (openzeppelin-solidity/contracts/token/ERC20/IERC20.sol) */ | |
/* file: openzeppelin-solidity/contracts/math/SafeMath.sol */ | |
pragma solidity ^0.5.0; | |
/** | |
* @title SafeMath | |
* @dev Unsigned math operations with safety checks that revert on error | |
*/ | |
library SafeMath { | |
/** | |
* @dev Multiplies two unsigned integers, 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 unsigned integers truncating the quotient, reverts on division by zero. | |
*/ | |
function div(uint256 a, uint256 b) internal pure returns (uint256) { | |
// Solidity only automatically asserts when dividing by 0 | |
require(b > 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 unsigned integers, 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 unsigned integers, 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 unsigned integers 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; | |
} | |
} | |
/* eof (openzeppelin-solidity/contracts/math/SafeMath.sol) */ | |
/* file: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol */ | |
pragma solidity ^0.5.0; | |
/** | |
* @title Standard ERC20 token | |
* | |
* @dev Implementation of the basic standard token. | |
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md | |
* Originally based on code by FirstBlood: | |
* https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol | |
* | |
* This implementation emits additional Approval events, allowing applications to reconstruct the allowance status for | |
* all accounts just by listening to said events. Note that this isn't required by the specification, and other | |
* compliant implementations may not do it. | |
*/ | |
contract ERC20 is IERC20 { | |
using SafeMath for uint256; | |
mapping (address => uint256) private _balances; | |
mapping (address => mapping (address => uint256)) private _allowed; | |
uint256 private _totalSupply; | |
/** | |
* @dev Total number of tokens in existence | |
*/ | |
function totalSupply() public view returns (uint256) { | |
return _totalSupply; | |
} | |
/** | |
* @dev Gets the balance of the specified address. | |
* @param owner The address to query the balance of. | |
* @return An uint256 representing the amount owned by the passed address. | |
*/ | |
function balanceOf(address owner) public view returns (uint256) { | |
return _balances[owner]; | |
} | |
/** | |
* @dev Function to check the amount of tokens that an owner allowed to a spender. | |
* @param owner address The address which owns the funds. | |
* @param spender address The address which will spend the funds. | |
* @return A uint256 specifying the amount of tokens still available for the spender. | |
*/ | |
function allowance(address owner, address spender) public view returns (uint256) { | |
return _allowed[owner][spender]; | |
} | |
/** | |
* @dev Transfer token for a specified address | |
* @param to The address to transfer to. | |
* @param value The amount to be transferred. | |
*/ | |
function transfer(address to, uint256 value) public returns (bool) { | |
_transfer(msg.sender, to, value); | |
return true; | |
} | |
/** | |
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. | |
* Beware that changing an allowance with this method brings the risk that someone may use both the old | |
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this | |
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: | |
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 | |
* @param spender The address which will spend the funds. | |
* @param value The amount of tokens to be spent. | |
*/ | |
function approve(address spender, uint256 value) public returns (bool) { | |
require(spender != address(0)); | |
_allowed[msg.sender][spender] = value; | |
emit Approval(msg.sender, spender, value); | |
return true; | |
} | |
/** | |
* @dev Transfer tokens from one address to another. | |
* Note that while this function emits an Approval event, this is not required as per the specification, | |
* and other compliant implementations may not emit the event. | |
* @param from address The address which you want to send tokens from | |
* @param to address The address which you want to transfer to | |
* @param value uint256 the amount of tokens to be transferred | |
*/ | |
function transferFrom(address from, address to, uint256 value) public returns (bool) { | |
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value); | |
_transfer(from, to, value); | |
emit Approval(from, msg.sender, _allowed[from][msg.sender]); | |
return true; | |
} | |
/** | |
* @dev Increase the amount of tokens that an owner allowed to a spender. | |
* approve should be called when allowed_[_spender] == 0. To increment | |
* allowed value is better to use this function to avoid 2 calls (and wait until | |
* the first transaction is mined) | |
* From MonolithDAO Token.sol | |
* Emits an Approval event. | |
* @param spender The address which will spend the funds. | |
* @param addedValue The amount of tokens to increase the allowance by. | |
*/ | |
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { | |
require(spender != address(0)); | |
_allowed[msg.sender][spender] = _allowed[msg.sender][spender].add(addedValue); | |
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); | |
return true; | |
} | |
/** | |
* @dev Decrease the amount of tokens that an owner allowed to a spender. | |
* approve should be called when allowed_[_spender] == 0. To decrement | |
* allowed value is better to use this function to avoid 2 calls (and wait until | |
* the first transaction is mined) | |
* From MonolithDAO Token.sol | |
* Emits an Approval event. | |
* @param spender The address which will spend the funds. | |
* @param subtractedValue The amount of tokens to decrease the allowance by. | |
*/ | |
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) { | |
require(spender != address(0)); | |
_allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(subtractedValue); | |
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); | |
return true; | |
} | |
/** | |
* @dev Transfer token for a specified addresses | |
* @param from The address to transfer from. | |
* @param to The address to transfer to. | |
* @param value The amount to be transferred. | |
*/ | |
function _transfer(address from, address to, uint256 value) internal { | |
require(to != address(0)); | |
_balances[from] = _balances[from].sub(value); | |
_balances[to] = _balances[to].add(value); | |
emit Transfer(from, to, value); | |
} | |
/** | |
* @dev Internal function that mints an amount of the token and assigns it to | |
* an account. This encapsulates the modification of balances such that the | |
* proper events are emitted. | |
* @param account The account that will receive the created tokens. | |
* @param value The amount that will be created. | |
*/ | |
function _mint(address account, uint256 value) internal { | |
require(account != address(0)); | |
_totalSupply = _totalSupply.add(value); | |
_balances[account] = _balances[account].add(value); | |
emit Transfer(address(0), account, value); | |
} | |
/** | |
* @dev Internal function that burns an amount of the token of a given | |
* account. | |
* @param account The account whose tokens will be burnt. | |
* @param value The amount that will be burnt. | |
*/ | |
function _burn(address account, uint256 value) internal { | |
require(account != address(0)); | |
_totalSupply = _totalSupply.sub(value); | |
_balances[account] = _balances[account].sub(value); | |
emit Transfer(account, address(0), value); | |
} | |
/** | |
* @dev Internal function that burns an amount of the token of a given | |
* account, deducting from the sender's allowance for said account. Uses the | |
* internal burn function. | |
* Emits an Approval event (reflecting the reduced allowance). | |
* @param account The account whose tokens will be burnt. | |
* @param value The amount that will be burnt. | |
*/ | |
function _burnFrom(address account, uint256 value) internal { | |
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value); | |
_burn(account, value); | |
emit Approval(account, msg.sender, _allowed[account][msg.sender]); | |
} | |
} | |
/* eof (openzeppelin-solidity/contracts/token/ERC20/ERC20.sol) */ | |
/* file: openzeppelin-solidity/contracts/token/ERC20/ERC20Detailed.sol */ | |
pragma solidity ^0.5.0; | |
/** | |
* @title ERC20Detailed token | |
* @dev The decimals are only for visualization purposes. | |
* All the operations are done using the smallest and indivisible token unit, | |
* just as on Ethereum all the operations are done in wei. | |
*/ | |
contract ERC20Detailed is IERC20 { | |
string private _name; | |
string private _symbol; | |
uint8 private _decimals; | |
constructor (string memory name, string memory symbol, uint8 decimals) public { | |
_name = name; | |
_symbol = symbol; | |
_decimals = decimals; | |
} | |
/** | |
* @return the name of the token. | |
*/ | |
function name() public view returns (string memory) { | |
return _name; | |
} | |
/** | |
* @return the symbol of the token. | |
*/ | |
function symbol() public view returns (string memory) { | |
return _symbol; | |
} | |
/** | |
* @return the number of decimals of the token. | |
*/ | |
function decimals() public view returns (uint8) { | |
return _decimals; | |
} | |
} | |
/* eof (openzeppelin-solidity/contracts/token/ERC20/ERC20Detailed.sol) */ | |
/* file: openzeppelin-solidity/contracts/token/ERC20/ERC20Burnable.sol */ | |
pragma solidity ^0.5.0; | |
/** | |
* @title Burnable Token | |
* @dev Token that can be irreversibly burned (destroyed). | |
*/ | |
contract ERC20Burnable is ERC20 { | |
/** | |
* @dev Burns a specific amount of tokens. | |
* @param value The amount of token to be burned. | |
*/ | |
function burn(uint256 value) public { | |
_burn(msg.sender, value); | |
} | |
/** | |
* @dev Burns a specific amount of tokens from the target address and decrements allowance | |
* @param from address The address which you want to send tokens from | |
* @param value uint256 The amount of token to be burned | |
*/ | |
function burnFrom(address from, uint256 value) public { | |
_burnFrom(from, value); | |
} | |
} | |
/* eof (openzeppelin-solidity/contracts/token/ERC20/ERC20Burnable.sol) */ | |
/* file: openzeppelin-solidity/contracts/access/Roles.sol */ | |
pragma solidity ^0.5.0; | |
/** | |
* @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]; | |
} | |
} | |
/* eof (openzeppelin-solidity/contracts/access/Roles.sol) */ | |
/* file: openzeppelin-solidity/contracts/access/roles/PauserRole.sol */ | |
pragma solidity ^0.5.0; | |
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); | |
} | |
} | |
/* eof (openzeppelin-solidity/contracts/access/roles/PauserRole.sol) */ | |
/* file: openzeppelin-solidity/contracts/lifecycle/Pausable.sol */ | |
pragma solidity ^0.5.0; | |
/** | |
* @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); | |
} | |
} | |
/* eof (openzeppelin-solidity/contracts/lifecycle/Pausable.sol) */ | |
/* file: openzeppelin-solidity/contracts/token/ERC20/ERC20Pausable.sol */ | |
pragma solidity ^0.5.0; | |
/** | |
* @title Pausable token | |
* @dev ERC20 modified with pausable transfers. | |
**/ | |
contract ERC20Pausable is ERC20, Pausable { | |
function transfer(address to, uint256 value) public whenNotPaused returns (bool) { | |
return super.transfer(to, value); | |
} | |
function transferFrom(address from, address to, uint256 value) public whenNotPaused returns (bool) { | |
return super.transferFrom(from, to, value); | |
} | |
function approve(address spender, uint256 value) public whenNotPaused returns (bool) { | |
return super.approve(spender, value); | |
} | |
function increaseAllowance(address spender, uint addedValue) public whenNotPaused returns (bool success) { | |
return super.increaseAllowance(spender, addedValue); | |
} | |
function decreaseAllowance(address spender, uint subtractedValue) public whenNotPaused returns (bool success) { | |
return super.decreaseAllowance(spender, subtractedValue); | |
} | |
} | |
/* eof (openzeppelin-solidity/contracts/token/ERC20/ERC20Pausable.sol) */ | |
/* file: openzeppelin-solidity/contracts/ownership/Ownable.sol */ | |
pragma solidity ^0.5.0; | |
/** | |
* @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; | |
} | |
} | |
/* eof (openzeppelin-solidity/contracts/ownership/Ownable.sol) */ | |
/* file: ./contracts/token/ERC20/IERC20Snapshot.sol */ | |
/** | |
* @title Interface ERC20 SnapshotToken (abstract contract) | |
* @author Validity Labs AG <info@validitylabs.org> | |
*/ | |
pragma solidity ^0.5.4; | |
/* solhint-disable no-empty-blocks */ | |
contract IERC20Snapshot { | |
/** | |
* @dev Queries the balance of `_owner` at a specific `_blockNumber` | |
* @param _owner The address from which the balance will be retrieved | |
* @param _blockNumber The block number when the balance is queried | |
* @return The balance at `_blockNumber` | |
*/ | |
function balanceOfAt(address _owner, uint _blockNumber) public view returns (uint256) {} | |
/** | |
* @notice Total amount of tokens at a specific `_blockNumber`. | |
* @param _blockNumber The block number when the totalSupply is queried | |
* @return The total amount of tokens at `_blockNumber` | |
*/ | |
function totalSupplyAt(uint _blockNumber) public view returns(uint256) {} | |
} | |
/* eof (./contracts/token/ERC20/IERC20Snapshot.sol) */ | |
/* file: ./contracts/token/ERC20/ERC20Snapshot.sol */ | |
/** | |
* @title ERC20 Snapshot Token | |
* inspired by Jordi Baylina's MiniMeToken to record historical balances | |
* @author Validity Labs AG <info@validitylabs.org> | |
*/ | |
pragma solidity ^0.5.4; | |
contract ERC20Snapshot is IERC20Snapshot, ERC20 { | |
using SafeMath for uint256; | |
/** | |
* @dev `Snapshot` is the structure that attaches a block number to a | |
* given value. The block number attached is the one that last changed the value | |
*/ | |
struct Snapshot { | |
uint128 fromBlock; // `fromBlock` is the block number at which the value was generated from | |
uint128 value; // `value` is the amount of tokens at a specific block number | |
} | |
/** | |
* @dev `_snapshotBalances` is the map that tracks the balance of each address, in this | |
* contract when the balance changes the block number that the change | |
* occurred is also included in the map | |
*/ | |
mapping (address => Snapshot[]) private _snapshotBalances; | |
// Tracks the history of the `_totalSupply` & '_mintedSupply' of the token | |
Snapshot[] private _snapshotTotalSupply; | |
/*** FUNCTIONS ***/ | |
/** OVERRIDE | |
* @dev Send `_value` tokens to `_to` from `msg.sender` | |
* @param _to The address of the recipient | |
* @param _value The amount of tokens to be transferred | |
* @return Whether the transfer was successful or not | |
*/ | |
function transfer(address _to, uint256 _value) public returns (bool result) { | |
result = super.transfer(_to, _value); | |
createSnapshot(msg.sender, _to); | |
} | |
/** OVERRIDE | |
* @dev Send `_value` tokens to `_to` from `_from` on the condition it is approved by `_from` | |
* @param _from The address holding the tokens being transferred | |
* @param _to The address of the recipient | |
* @param _value The amount of tokens to be transferred | |
* @return True if the transfer was successful | |
*/ | |
function transferFrom(address _from, address _to, uint256 _value) public returns (bool result) { | |
result = super.transferFrom(_from, _to, _value); | |
createSnapshot(_from, _to); | |
} | |
/** | |
* @dev Queries the balance of `_owner` at a specific `_blockNumber` | |
* @param _owner The address from which the balance will be retrieved | |
* @param _blockNumber The block number when the balance is queried | |
* @return The balance at `_blockNumber` | |
*/ | |
function balanceOfAt(address _owner, uint _blockNumber) public view returns (uint256) { | |
return getValueAt(_snapshotBalances[_owner], _blockNumber); | |
} | |
/** | |
* @dev Total supply cap of tokens at a specific `_blockNumber`. | |
* @param _blockNumber The block number when the totalSupply is queried | |
* @return The total supply cap of tokens at `_blockNumber` | |
*/ | |
function totalSupplyAt(uint _blockNumber) public view returns(uint256) { | |
return getValueAt(_snapshotTotalSupply, _blockNumber); | |
} | |
/*** Internal functions ***/ | |
/** | |
* @dev Updates snapshot mappings for _from and _to and emit an event | |
* @param _from The address holding the tokens being transferred | |
* @param _to The address of the recipient | |
* @return True if the transfer was successful | |
*/ | |
function createSnapshot(address _from, address _to) internal { | |
updateValueAtNow(_snapshotBalances[_from], balanceOf(_from)); | |
updateValueAtNow(_snapshotBalances[_to], balanceOf(_to)); | |
} | |
/** | |
* @dev `getValueAt` retrieves the number of tokens at a given block number | |
* @param checkpoints The history of values being queried | |
* @param _block The block number to retrieve the value at | |
* @return The number of tokens being queried | |
*/ | |
function getValueAt(Snapshot[] storage checkpoints, uint _block) internal view returns (uint) { | |
if (checkpoints.length == 0) return 0; | |
// Shortcut for the actual value | |
if (_block >= checkpoints[checkpoints.length.sub(1)].fromBlock) { | |
return checkpoints[checkpoints.length.sub(1)].value; | |
} | |
if (_block < checkpoints[0].fromBlock) { | |
return 0; | |
} | |
// Binary search of the value in the array | |
uint min; | |
uint max = checkpoints.length.sub(1); | |
while (max > min) { | |
uint mid = (max.add(min).add(1)).div(2); | |
if (checkpoints[mid].fromBlock <= _block) { | |
min = mid; | |
} else { | |
max = mid.sub(1); | |
} | |
} | |
return checkpoints[min].value; | |
} | |
/** | |
* @dev `updateValueAtNow` used to update the `_snapshotBalances` map and the `_snapshotTotalSupply` | |
* @param checkpoints The history of data being updated | |
* @param _value The new number of tokens | |
*/ | |
function updateValueAtNow(Snapshot[] storage checkpoints, uint _value) internal { | |
if ((checkpoints.length == 0) || (checkpoints[checkpoints.length.sub(1)].fromBlock < block.number)) { | |
checkpoints.push(Snapshot(uint128(block.number), uint128(_value))); | |
} else { | |
checkpoints[checkpoints.length.sub(1)].value = uint128(_value); | |
} | |
} | |
} | |
/* eof (./contracts/token/ERC20/ERC20Snapshot.sol) */ | |
/* file: ./contracts/token/ERC20/ERC20ForcedTransfer.sol */ | |
/** | |
* @title ERC20Confiscatable | |
* @author Validity Labs AG <info@validitylabs.org> | |
*/ | |
pragma solidity ^0.5.4; | |
contract ERC20ForcedTransfer is Ownable, ERC20 { | |
/*** EVENTS ***/ | |
event ForcedTransfer(address indexed account, uint256 amount, address indexed receiver); | |
/*** FUNCTIONS ***/ | |
/** | |
* @notice takes funds from _confiscatee and sends them to _receiver | |
* @param _confiscatee address who's funds are being confiscated | |
* @param _receiver address who's receiving the funds | |
*/ | |
function forceTransfer(address _confiscatee, address _receiver) public onlyOwner { | |
uint256 balance = balanceOf(_confiscatee); | |
_transfer(_confiscatee, _receiver, balance); | |
emit ForcedTransfer(_confiscatee, balance, _receiver); | |
} | |
} | |
/* eof (./contracts/token/ERC20/ERC20ForcedTransfer.sol) */ | |
/* file: ./contracts/utils/Utils.sol */ | |
/** | |
* @title Manageable Contract | |
* @author Validity Labs AG <info@validitylabs.org> | |
*/ | |
pragma solidity ^0.5.4; | |
contract Utils { | |
/** MODIFIERS **/ | |
modifier onlyValidAddress(address _address) { | |
require(_address != address(0), "invalid address"); | |
_; | |
} | |
} | |
/* eof (./contracts/utils/Utils.sol) */ | |
/* file: ./contracts/management/Manageable.sol */ | |
/** | |
* @title Manageable Contract | |
* @author Validity Labs AG <info@validitylabs.org> | |
*/ | |
pragma solidity ^0.5.4; | |
contract Manageable is Ownable, Utils { | |
mapping(address => bool) public isManager; // manager accounts | |
/** EVENTS **/ | |
event ChangedManager(address indexed manager, bool active); | |
/** MODIFIERS **/ | |
modifier onlyManager() { | |
require(isManager[msg.sender], "is not manager"); | |
_; | |
} | |
/** | |
* @notice constructor sets the deployer as a manager | |
*/ | |
constructor() public { | |
setManager(msg.sender, true); | |
} | |
/** | |
* @notice enable/disable an account to be a manager | |
* @param _manager address address of the manager to create/alter | |
* @param _active bool flag that shows if the manager account is active | |
*/ | |
function setManager(address _manager, bool _active) public onlyOwner onlyValidAddress(_manager) { | |
isManager[_manager] = _active; | |
emit ChangedManager(_manager, _active); | |
} | |
} | |
/* eof (./contracts/management/Manageable.sol) */ | |
/* file: ./contracts/whitelist/GlobalWhitelist.sol */ | |
/** | |
* @title Global Whitelist Contract | |
* @author Validity Labs AG <info@validitylabs.org> | |
*/ | |
pragma solidity ^0.5.4; | |
contract GlobalWhitelist is Ownable, Manageable { | |
using SafeMath for uint256; | |
mapping(address => bool) public isWhitelisted; // addresses of who's whitelisted | |
bool public isWhitelisting = true; // whitelisting enabled by default | |
/** EVENTS **/ | |
event ChangedWhitelisting(address indexed registrant, bool whitelisted); | |
event GlobalWhitelistDisabled(address indexed manager); | |
event GlobalWhitelistEnabled(address indexed manager); | |
/** | |
* @dev add an address to the whitelist | |
* @param _address address | |
*/ | |
function addAddressToWhitelist(address _address) public onlyManager onlyValidAddress(_address) { | |
isWhitelisted[_address] = true; | |
emit ChangedWhitelisting(_address, true); | |
} | |
/** | |
* @dev add addresses to the whitelist | |
* @param _addresses addresses array | |
*/ | |
function addAddressesToWhitelist(address[] memory _addresses) public { | |
for (uint256 i = 0; i < _addresses.length; i++) { | |
addAddressToWhitelist(_addresses[i]); | |
} | |
} | |
/** | |
* @dev remove an address from the whitelist | |
* @param _address address | |
*/ | |
function removeAddressFromWhitelist(address _address) public onlyManager onlyValidAddress(_address) { | |
isWhitelisted[_address] = false; | |
emit ChangedWhitelisting(_address, false); | |
} | |
/** | |
* @dev remove addresses from the whitelist | |
* @param _addresses addresses | |
*/ | |
function removeAddressesFromWhitelist(address[] memory _addresses) public { | |
for (uint256 i = 0; i < _addresses.length; i++) { | |
removeAddressFromWhitelist(_addresses[i]); | |
} | |
} | |
/** | |
* @notice toggle the whitelist by the parent contract; ExporoTokenFactory | |
*/ | |
function toggleWhitelist() public onlyOwner { | |
isWhitelisting ? isWhitelisting = false : isWhitelisting = true; | |
if (isWhitelisting) { | |
emit GlobalWhitelistEnabled(msg.sender); | |
} else { | |
emit GlobalWhitelistDisabled(msg.sender); | |
} | |
} | |
} | |
/* eof (./contracts/whitelist/GlobalWhitelist.sol) */ | |
/* file: ./contracts/token/ERC20/ERC20Whitelist.sol */ | |
/** | |
* @title ERC20Whitelist | |
* @author Validity Labs AG <info@validitylabs.org> | |
*/ | |
pragma solidity ^0.5.4; | |
contract ERC20Whitelist is Ownable, ERC20 { | |
GlobalWhitelist public whitelist; | |
bool public isWhitelisting = true; // default to true | |
/** EVENTS **/ | |
event ESTWhitelistingEnabled(); | |
event ESTWhitelistingDisabled(); | |
/*** FUNCTIONS ***/ | |
/** | |
* @notice disables whitelist per individual EST | |
* @dev parnent contract, ExporoTokenFactory, is owner | |
*/ | |
function toggleWhitelist() external onlyOwner { | |
isWhitelisting ? isWhitelisting = false : isWhitelisting = true; | |
if (isWhitelisting) { | |
emit ESTWhitelistingEnabled(); | |
} else { | |
emit ESTWhitelistingDisabled(); | |
} | |
} | |
/** OVERRIDE | |
* @dev transfer token for a specified address | |
* @param _to The address to transfer to. | |
* @param _value The amount to be transferred. | |
* @return bool | |
*/ | |
function transfer(address _to, uint256 _value) public returns (bool) { | |
if (checkWhitelistEnabled()) { | |
checkIfWhitelisted(msg.sender); | |
checkIfWhitelisted(_to); | |
} | |
return super.transfer(_to, _value); | |
} | |
/** OVERRIDE | |
* @dev Transfer tokens from one address to another | |
* @param _from address The address which you want to send tokens from | |
* @param _to address The address which you want to transfer to | |
* @param _value uint256 the amount of tokens to be transferred | |
* @return bool | |
*/ | |
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) { | |
if (checkWhitelistEnabled()) { | |
checkIfWhitelisted(_from); | |
checkIfWhitelisted(_to); | |
} | |
return super.transferFrom(_from, _to, _value); | |
} | |
/** | |
* @dev check if whitelisting is in effect versus local and global bools | |
* @return bool | |
*/ | |
function checkWhitelistEnabled() public view returns (bool) { | |
// local whitelist | |
if (isWhitelisting) { | |
// global whitelist | |
if (whitelist.isWhitelisting()) { | |
return true; | |
} | |
} | |
return false; | |
} | |
/*** INTERNAL/PRIVATE ***/ | |
/** | |
* @dev check if the address has been whitelisted by the Whitelist contract | |
* @param _account address of the account to check | |
*/ | |
function checkIfWhitelisted(address _account) internal view { | |
require(whitelist.isWhitelisted(_account), "not whitelisted"); | |
} | |
} | |
/* eof (./contracts/token/ERC20/ERC20Whitelist.sol) */ | |
/* file: ./contracts/token/ERC20/ERC20DocumentRegistry.sol */ | |
/** | |
* @title ERC20 Document Registry Contract | |
* @author Validity Labs AG <info@validitylabs.org> | |
*/ | |
pragma solidity ^0.5.4; | |
/** | |
* @notice Prospectus and Quarterly Reports stored hashes via IPFS | |
* @dev read IAgreement for details under /contracts/neufund/standards | |
*/ | |
// solhint-disable not-rely-on-time | |
contract ERC20DocumentRegistry is Ownable { | |
using SafeMath for uint256; | |
struct HashedDocument { | |
uint256 timestamp; | |
string documentUri; | |
} | |
// array of all documents | |
HashedDocument[] private _documents; | |
event LogDocumentedAdded(string documentUri, uint256 documentIndex); | |
/** | |
* @notice adds a document's uri from IPFS to the array | |
* @param documentUri string | |
*/ | |
function addDocument(string memory documentUri) public onlyOwner { | |
require(bytes(documentUri).length > 0, "invalid documentUri"); | |
HashedDocument memory document = HashedDocument({ | |
timestamp: block.timestamp, | |
documentUri: documentUri | |
}); | |
_documents.push(document); | |
emit LogDocumentedAdded(documentUri, _documents.length.sub(1)); | |
} | |
/** | |
* @notice fetch the latest document on the array | |
* @return uint256, string, uint256 | |
*/ | |
function currentDocument() public view | |
returns (uint256 timestamp, string memory documentUri, uint256 index) { | |
require(_documents.length > 0, "no documents exist"); | |
uint256 last = _documents.length.sub(1); | |
HashedDocument storage document = _documents[last]; | |
return (document.timestamp, document.documentUri, last); | |
} | |
/** | |
* @notice adds a document's uri from IPFS to the array | |
* @param documentIndex uint256 | |
* @return uint256, string, uint256 | |
*/ | |
function getDocument(uint256 documentIndex) public view | |
returns (uint256 timestamp, string memory documentUri, uint256 index) { | |
require(documentIndex < _documents.length, "invalid index"); | |
HashedDocument storage document = _documents[documentIndex]; | |
return (document.timestamp, document.documentUri, documentIndex); | |
} | |
/** | |
* @notice return the total amount of documents in the array | |
* @return uint256 | |
*/ | |
function documentCount() public view returns (uint256) { | |
return _documents.length; | |
} | |
} | |
/* eof (./contracts/token/ERC20/ERC20DocumentRegistry.sol) */ | |
/* file: ./contracts/exporo/ExporoToken.sol */ | |
/** | |
* @title SampleToken Token Contract | |
* @author Validity Labs AG <info@validitylabs.org> | |
*/ | |
pragma solidity ^0.5.4; | |
contract SampleToken is Ownable, ERC20, ERC20Detailed { | |
/*** FUNCTIONS ***/ | |
/** | |
* @dev constructor | |
* @param _name string | |
* @param _symbol string | |
* @param _decimal uint8 | |
* @param _initialSupply uint256 initial total supply cap. can be 0 | |
* @param _recipient address to recieve the tokens | |
*/ | |
/* solhint-disable */ | |
constructor(string memory _name, string memory _symbol, uint8 _decimal, uint256 _initialSupply, address _recipient) | |
public | |
ERC20Detailed(_name, _symbol, _decimal) { | |
_mint(_recipient, _initialSupply); | |
} | |
/* solhint-enable */ | |
} | |
/* eof (./contracts/exporo/ExporoToken.sol) */ |
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