Contract Source Code:
File 1 of 1 : InxToken
// File: contracts/1404/IERC1404.sol
pragma solidity 0.5.8;
interface IERC1404 {
/// @notice Detects if a transfer will be reverted and if so returns an appropriate reference code
/// @param from Sending address
/// @param to Receiving address
/// @param value Amount of tokens being transferred
/// @return Code by which to reference message for rejection reasoning
/// @dev Overwrite with your custom transfer restriction logic
function detectTransferRestriction (address from, address to, uint256 value) external view returns (uint8);
/// @notice Detects if a transferFrom will be reverted and if so returns an appropriate reference code
/// @param sender Transaction sending address
/// @param from Source of funds address
/// @param to Receiving address
/// @param value Amount of tokens being transferred
/// @return Code by which to reference message for rejection reasoning
/// @dev Overwrite with your custom transfer restriction logic
function detectTransferFromRestriction (address sender, address from, address to, uint256 value) external view returns (uint8);
/// @notice Returns a human-readable message for a given restriction code
/// @param restrictionCode Identifier for looking up a message
/// @return Text showing the restriction's reasoning
/// @dev Overwrite with your custom message and restrictionCode handling
function messageForTransferRestriction (uint8 restrictionCode) external view returns (string memory);
}
interface IERC1404getSuccessCode {
/// @notice Return the uint256 that represents the SUCCESS_CODE
/// @return uint256 SUCCESS_CODE
function getSuccessCode () external view returns (uint256);
}
/**
* @title IERC1404Success
* @dev Combines IERC1404 and IERC1404getSuccessCode interfaces, to be implemented by the TransferRestrictions contract
*/
contract IERC1404Success is IERC1404getSuccessCode, IERC1404 {
}
// File: contracts/1404/IERC1404Validators.sol
pragma solidity 0.5.8;
/**
* @title IERC1404Validators
* @dev Interfaces implemented by the token contract to be called by the TransferRestrictions contract
*/
interface IERC1404Validators {
/// @notice Returns the token balance for an account
/// @param account The address to get the token balance of
/// @return uint256 representing the token balance for the account
function balanceOf (address account) external view returns (uint256);
/// @notice Returns a boolean indicating the paused state of the contract
/// @return true if contract is paused, false if unpaused
function paused () external view returns (bool);
/// @notice Determine if sender and receiver are whitelisted, return true if both accounts are whitelisted
/// @param from The address sending tokens.
/// @param to The address receiving tokens.
/// @return true if both accounts are whitelisted, false if not
function checkWhitelists (address from, address to) external view returns (bool);
/// @notice Determine if a users tokens are locked preventing a transfer
/// @param _address the address to retrieve the data from
/// @param amount the amount to send
/// @param balance the token balance of the sending account
/// @return true if user has sufficient unlocked token to transfer the requested amount, false if not
function checkTimelock (address _address, uint256 amount, uint256 balance) external view returns (bool);
}
// File: @openzeppelin/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(!has(role, account), "Roles: account already has role");
role.bearer[account] = true;
}
/**
* @dev Remove an account's access to this role.
*/
function remove(Role storage role, address account) internal {
require(has(role, account), "Roles: account does not have role");
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), "Roles: account is the zero address");
return role.bearer[account];
}
}
// File: contracts/roles/OwnerRole.sol
pragma solidity 0.5.8;
contract OwnerRole {
using Roles for Roles.Role;
event OwnerAdded(address indexed addedOwner, address indexed addedBy);
event OwnerRemoved(address indexed removedOwner, address indexed removedBy);
Roles.Role private _owners;
modifier onlyOwner() {
require(isOwner(msg.sender), "OwnerRole: caller does not have the Owner role");
_;
}
function isOwner(address account) public view returns (bool) {
return _owners.has(account);
}
function addOwner(address account) public onlyOwner {
_addOwner(account);
}
function removeOwner(address account) public onlyOwner {
require(msg.sender != account, "Owners cannot remove themselves as owner");
_removeOwner(account);
}
function _addOwner(address account) internal {
_owners.add(account);
emit OwnerAdded(account, msg.sender);
}
function _removeOwner(address account) internal {
_owners.remove(account);
emit OwnerRemoved(account, msg.sender);
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.5.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.5.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: 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
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.5.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot 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-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.5.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20Mintable}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for `sender`'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Destroys `amount` tokens from `account`.`amount` is then deducted
* from the caller's allowance.
*
* See {_burn} and {_approve}.
*/
function _burnFrom(address account, uint256 amount) internal {
_burn(account, amount);
_approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
}
}
// File: contracts/roles/RevokerRole.sol
pragma solidity 0.5.8;
contract RevokerRole is OwnerRole {
event RevokerAdded(address indexed addedRevoker, address indexed addedBy);
event RevokerRemoved(address indexed removedRevoker, address indexed removedBy);
Roles.Role private _revokers;
modifier onlyRevoker() {
require(isRevoker(msg.sender), "RevokerRole: caller does not have the Revoker role");
_;
}
function isRevoker(address account) public view returns (bool) {
return _revokers.has(account);
}
function addRevoker(address account) public onlyOwner {
_addRevoker(account);
}
function removeRevoker(address account) public onlyOwner {
_removeRevoker(account);
}
function _addRevoker(address account) internal {
_revokers.add(account);
emit RevokerAdded(account, msg.sender);
}
function _removeRevoker(address account) internal {
_revokers.remove(account);
emit RevokerRemoved(account, msg.sender);
}
}
// File: contracts/capabilities/Revocable.sol
pragma solidity 0.5.8;
/**
* Allows an administrator to move tokens from a target account to their own.
*/
contract Revocable is ERC20, RevokerRole {
event Revoke(address indexed revoker, address indexed from, uint256 amount);
function revoke(
address _from,
uint256 _amount
)
public
onlyRevoker
returns (bool)
{
ERC20._transfer(_from, msg.sender, _amount);
emit Revoke(msg.sender, _from, _amount);
return true;
}
}
// File: contracts/roles/WhitelisterRole.sol
pragma solidity 0.5.8;
contract WhitelisterRole is OwnerRole {
event WhitelisterAdded(address indexed addedWhitelister, address indexed addedBy);
event WhitelisterRemoved(address indexed removedWhitelister, address indexed removedBy);
Roles.Role private _whitelisters;
modifier onlyWhitelister() {
require(isWhitelister(msg.sender), "WhitelisterRole: caller does not have the Whitelister role");
_;
}
function isWhitelister(address account) public view returns (bool) {
return _whitelisters.has(account);
}
function addWhitelister(address account) public onlyOwner {
_addWhitelister(account);
}
function removeWhitelister(address account) public onlyOwner {
_removeWhitelister(account);
}
function _addWhitelister(address account) internal {
_whitelisters.add(account);
emit WhitelisterAdded(account, msg.sender);
}
function _removeWhitelister(address account) internal {
_whitelisters.remove(account);
emit WhitelisterRemoved(account, msg.sender);
}
}
// File: contracts/capabilities/Whitelistable.sol
pragma solidity 0.5.8;
/**
* @title Whitelistable
* @dev Allows tracking whether addressess are allowed to hold tokens.
*/
contract Whitelistable is WhitelisterRole {
event WhitelistUpdate(address _address, bool status, string data);
// Tracks whether an address is whitelisted
// data field can track any external field (like a hash of personal details)
struct whiteListItem {
bool status;
string data;
}
// white list status
mapping (address => whiteListItem) public whitelist;
/**
* @dev Set a white list address
* @param to the address to be set
* @param status the whitelisting status (true for yes, false for no)
* @param data a string with data about the whitelisted address
*/
function setWhitelist(address to, bool status, string memory data) public onlyWhitelister returns(bool){
whitelist[to] = whiteListItem(status, data);
emit WhitelistUpdate(to, status, data);
return true;
}
/**
* @dev Get the status of the whitelist
* @param _address the address to be check
*/
function getWhitelistStatus(address _address) public view returns(bool){
return whitelist[_address].status;
}
/**
* @dev Get the data of and address in the whitelist
* @param _address the address to retrieve the data from
*/
function getWhitelistData(address _address) public view returns(string memory){
return whitelist[_address].data;
}
/**
* @dev Determine if sender and receiver are whitelisted, return true if both accounts are whitelisted
* @param from The address sending tokens.
* @param to The address receiving tokens.
*/
function checkWhitelists(address from, address to) external view returns (bool) {
return whitelist[from].status && whitelist[to].status;
}
}
// File: contracts/roles/TimelockerRole.sol
pragma solidity 0.5.8;
contract TimelockerRole is OwnerRole {
event TimelockerAdded(address indexed addedTimelocker, address indexed addedBy);
event TimelockerRemoved(address indexed removedTimelocker, address indexed removedBy);
Roles.Role private _timelockers;
modifier onlyTimelocker() {
require(isTimelocker(msg.sender), "TimelockerRole: caller does not have the Timelocker role");
_;
}
function isTimelocker(address account) public view returns (bool) {
return _timelockers.has(account);
}
function addTimelocker(address account) public onlyOwner {
_addTimelocker(account);
}
function removeTimelocker(address account) public onlyOwner {
_removeTimelocker(account);
}
function _addTimelocker(address account) internal {
_timelockers.add(account);
emit TimelockerAdded(account, msg.sender);
}
function _removeTimelocker(address account) internal {
_timelockers.remove(account);
emit TimelockerRemoved(account, msg.sender);
}
}
// File: contracts/capabilities/Timelockable.sol
pragma solidity 0.5.8;
/**
* @title INX Timelockable
* @dev Lockup all or a portion of an accounts tokens until an expiration date
*/
contract Timelockable is TimelockerRole {
using SafeMath for uint256;
struct lockupItem {
uint256 amount;
uint256 releaseTime;
}
mapping (address => lockupItem) lockups;
event AccountLock(address _address, uint256 amount, uint256 releaseTime);
event AccountRelease(address _address, uint256 amount);
/**
* @dev lock address and amount and lock it, set the release time
* @param _address the address to lock
* @param amount the amount to lock
* @param releaseTime of the locked amount (in seconds since the epoch)
*/
function lock( address _address, uint256 amount, uint256 releaseTime) public onlyTimelocker returns (bool) {
require(releaseTime > block.timestamp, "Release time needs to be in the future");
require(_address != address(0), "Address must be valid for lockup");
lockupItem memory _lockupItem = lockupItem(amount, releaseTime);
lockups[_address] = _lockupItem;
emit AccountLock(_address, amount, releaseTime);
return true;
}
/**
* @dev release locked amount
* @param _address the address to retrieve the data from
* @param amountToRelease the amount to check
*/
function release( address _address, uint256 amountToRelease) public onlyTimelocker returns(bool) {
require(_address != address(0), "Address must be valid for release");
uint256 _lockedAmount = lockups[_address].amount;
// nothing to release
if(_lockedAmount == 0){
emit AccountRelease(_address, 0);
return true;
}
// extract release time for re-locking
uint256 _releaseTime = lockups[_address].releaseTime;
// delete the lock entry
delete lockups[_address];
if(_lockedAmount >= amountToRelease){
uint256 newLockedAmount = _lockedAmount.sub(amountToRelease);
// re-lock the new locked balance
lock(_address, newLockedAmount, _releaseTime);
emit AccountRelease(_address, amountToRelease);
return true;
} else {
// if they requested to release more than the locked amount emit the event with the locked amount that has been released
emit AccountRelease(_address, _lockedAmount);
return true;
}
}
/**
* @dev return true if the given account has enough unlocked tokens to send the requested amount
* @param _address the address to retrieve the data from
* @param amount the amount to send
* @param balance the token balance of the sending account
*/
function checkTimelock(address _address, uint256 amount, uint256 balance) external view returns (bool) {
// if the user does not have enough tokens to send regardless of lock return true here
// the failure will still fail but this should make it explicit that the transfer failure is not
// due to locked tokens but because of too low token balance
if (balance < amount) {
return true;
}
// get the sending addresses token balance that is not locked
uint256 nonLockedAmount = balance.sub(lockups[_address].amount);
// determine if the sending address has enough free tokens to send the entire amount
bool notLocked = amount <= nonLockedAmount;
// if the timelock is greater then the release time the time lock is expired
bool timeLockExpired = block.timestamp > lockups[_address].releaseTime;
// if the timelock is expired OR the requested amount is available the transfer is not locked
if(timeLockExpired || notLocked){
return true;
// if the timelocked is not expired AND the requested amount is not available the tranfer is locked
} else {
return false;
}
}
/**
* @dev get address lockup info
* @param _address the address to retrieve the data from
* @return array of 2 uint256, release time (in seconds since the epoch) and amount (in INX)
*/
function checkLockup(address _address) public view returns(uint256, uint256) {
// copy lockup data into memory
lockupItem memory _lockupItem = lockups[_address];
return (_lockupItem.releaseTime, _lockupItem.amount);
}
}
// File: contracts/roles/PauserRole.sol
pragma solidity 0.5.8;
contract PauserRole is OwnerRole {
event PauserAdded(address indexed addedPauser, address indexed addedBy);
event PauserRemoved(address indexed removedPauser, address indexed removedBy);
Roles.Role private _pausers;
modifier onlyPauser() {
require(isPauser(msg.sender), "PauserRole: caller does not have the Pauser role");
_;
}
function isPauser(address account) public view returns (bool) {
return _pausers.has(account);
}
function addPauser(address account) public onlyOwner {
_addPauser(account);
}
function removePauser(address account) public onlyOwner {
_removePauser(account);
}
function _addPauser(address account) internal {
_pausers.add(account);
emit PauserAdded(account, msg.sender);
}
function _removePauser(address account) internal {
_pausers.remove(account);
emit PauserRemoved(account, msg.sender);
}
}
// File: contracts/capabilities/Pausable.sol
pragma solidity 0.5.8;
/**
* Allows transfers on a token contract to be paused by an administrator.
*/
contract Pausable is PauserRole {
event Paused();
event Unpaused();
bool private _paused;
/**
* @return true if the contract is paused, false otherwise.
*/
function paused() external view returns (bool) {
return _paused;
}
/**
* @dev internal function, triggers paused state
*/
function _pause() internal {
_paused = true;
emit Paused();
}
/**
* @dev internal function, returns to unpaused state
*/
function _unpause() internal {
_paused = false;
emit Unpaused();
}
/**
* @dev called by pauser role to pause, triggers stopped state
*/
function pause() public onlyPauser {
_pause();
}
/**
* @dev called by pauer role to unpause, returns to normal state
*/
function unpause() public onlyPauser {
_unpause();
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20Detailed.sol
pragma solidity ^0.5.0;
/**
* @dev Optional functions from the ERC20 standard.
*/
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
* these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
}
// File: contracts/InxToken.sol
pragma solidity 0.5.8;
contract InxToken is IERC1404, IERC1404Validators, IERC20, ERC20Detailed, OwnerRole, Revocable, Whitelistable, Timelockable, Pausable {
// Token Details
string constant TOKEN_NAME = "INX Token";
string constant TOKEN_SYMBOL = "INX";
uint8 constant TOKEN_DECIMALS = 18;
// Token supply - 2 Hundred Million Tokens, with 18 decimal precision
uint256 constant HUNDRED_MILLION = 100000000;
uint256 constant TOKEN_SUPPLY = 2 * HUNDRED_MILLION * (10 ** uint256(TOKEN_DECIMALS));
// This tracks the external contract where restriction logic is executed
IERC1404Success private transferRestrictions;
// Event tracking when restriction logic contract is updated
event RestrictionsUpdated (address newRestrictionsAddress, address updatedBy);
/**
Constructor for the token to set readable details and mint all tokens
to the specified owner.
*/
constructor(address owner) public
ERC20Detailed(TOKEN_NAME, TOKEN_SYMBOL, TOKEN_DECIMALS)
{
_mint(owner, TOKEN_SUPPLY);
_addOwner(owner);
}
/**
Function that can only be called by an owner that updates the address
with the ERC1404 Transfer Restrictions defined
*/
function updateTransferRestrictions(address _newRestrictionsAddress)
public
onlyOwner
returns (bool)
{
transferRestrictions = IERC1404Success(_newRestrictionsAddress);
emit RestrictionsUpdated(address(transferRestrictions), msg.sender);
return true;
}
/**
The address with the Transfer Restrictions contract
*/
function getRestrictionsAddress () public view returns (address) {
return address(transferRestrictions);
}
/**
This function detects whether a transfer should be restricted and not allowed.
If the function returns SUCCESS_CODE (0) then it should be allowed.
*/
function detectTransferRestriction (address from, address to, uint256 amount)
public
view
returns (uint8)
{
// Verify the external contract is valid
require(address(transferRestrictions) != address(0), 'TransferRestrictions contract must be set');
// call detectTransferRestriction on the current transferRestrictions contract
return transferRestrictions.detectTransferRestriction(from, to, amount);
}
/**
This function detects whether a transferFrom should be restricted and not allowed.
If the function returns SUCCESS_CODE (0) then it should be allowed.
*/
function detectTransferFromRestriction (address sender, address from, address to, uint256 amount)
public
view
returns (uint8)
{
// Verify the external contract is valid
require(address(transferRestrictions) != address(0), 'TransferRestrictions contract must be set');
// call detectTransferFromRestriction on the current transferRestrictions contract
return transferRestrictions.detectTransferFromRestriction(sender, from, to, amount);
}
/**
This function allows a wallet or other client to get a human readable string to show
a user if a transfer was restricted. It should return enough information for the user
to know why it failed.
*/
function messageForTransferRestriction (uint8 restrictionCode)
external
view
returns (string memory)
{
// call messageForTransferRestriction on the current transferRestrictions contract
return transferRestrictions.messageForTransferRestriction(restrictionCode);
}
/**
Evaluates whether a transfer should be allowed or not.
*/
modifier notRestricted (address from, address to, uint256 value) {
uint8 restrictionCode = transferRestrictions.detectTransferRestriction(from, to, value);
require(restrictionCode == transferRestrictions.getSuccessCode(), transferRestrictions.messageForTransferRestriction(restrictionCode));
_;
}
/**
Evaluates whether a transferFrom should be allowed or not.
*/
modifier notRestrictedTransferFrom (address sender, address from, address to, uint256 value) {
uint8 transferFromRestrictionCode = transferRestrictions.detectTransferFromRestriction(sender, from, to, value);
require(transferFromRestrictionCode == transferRestrictions.getSuccessCode(), transferRestrictions.messageForTransferRestriction(transferFromRestrictionCode));
_;
}
/**
Overrides the parent class token transfer function to enforce restrictions.
*/
function transfer (address to, uint256 value)
public
notRestricted(msg.sender, to, value)
returns (bool success)
{
success = ERC20.transfer(to, value);
}
/**
Overrides the parent class token transferFrom function to enforce restrictions.
*/
function transferFrom (address from, address to, uint256 value)
public
notRestrictedTransferFrom(msg.sender, from, to, value)
returns (bool success)
{
success = ERC20.transferFrom(from, to, value);
}
}