文件 1 的 1:EcobankaToken.sol
pragma solidity ^0.7.0;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract Context {
constructor () { }
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this;
return msg.data;
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
constructor (string memory name, string memory symbol) {
_name = name;
_symbol = symbol;
_decimals = 4;
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint256 amount) internal virtual {
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);
}
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
abstract contract ERC20Capped is ERC20 {
using SafeMath for uint256;
uint256 private _cap;
constructor (uint256 cap) {
require(cap > 0, "ERC20Capped: cap is 0");
_cap = cap;
}
function cap() public view returns (uint256) {
return _cap;
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
if (from == address(0)) {
require(totalSupply().add(amount) <= _cap, "ERC20Capped: cap exceeded");
}
}
}
abstract contract ERC20Burnable is Context, ERC20 {
using SafeMath for uint256;
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
function burnFrom(address account, uint256 amount) public virtual {
uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");
_approve(account, _msgSender(), decreasedAllowance);
_burn(account, amount);
}
}
interface IERC165 {
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
interface IERC1363 is IERC20, IERC165 {
function transferAndCall(address to, uint256 value) external returns (bool);
function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);
function transferFromAndCall(address from, address to, uint256 value) external returns (bool);
function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);
function approveAndCall(address spender, uint256 value) external returns (bool);
function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}
contract ERC165 is IERC165 {
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () {
_registerInterface(_INTERFACE_ID_ERC165);
}
function supportsInterface(bytes4 interfaceId) public view override returns (bool) {
return _supportedInterfaces[interfaceId];
}
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
interface IERC1363Receiver {
function onTransferReceived(address operator, address from, uint256 value, bytes calldata data) external returns (bytes4);
}
interface IERC1363Spender {
function onApprovalReceived(address owner, uint256 value, bytes calldata data) external returns (bytes4);
}
library ERC165Checker {
bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
function supportsERC165(address account) internal view returns (bool) {
return _supportsERC165Interface(account, _INTERFACE_ID_ERC165) &&
!_supportsERC165Interface(account, _INTERFACE_ID_INVALID);
}
function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
return supportsERC165(account) &&
_supportsERC165Interface(account, interfaceId);
}
function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
if (!supportsERC165(account)) {
return false;
}
for (uint256 i = 0; i < interfaceIds.length; i++) {
if (!_supportsERC165Interface(account, interfaceIds[i])) {
return false;
}
}
return true;
}
function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) {
(bool success, bool result) = _callERC165SupportsInterface(account, interfaceId);
return (success && result);
}
function _callERC165SupportsInterface(address account, bytes4 interfaceId)
private
view
returns (bool, bool)
{
bytes memory encodedParams = abi.encodeWithSelector(_INTERFACE_ID_ERC165, interfaceId);
(bool success, bytes memory result) = account.staticcall{ gas: 3000000 }(encodedParams);
if (result.length < 32) return (false, false);
return (success, abi.decode(result, (bool)));
}
}
contract ERC1363 is ERC20, IERC1363, ERC165 {
using Address for address;
bytes4 internal constant _INTERFACE_ID_ERC1363_TRANSFER = 0x4bbee2df;
bytes4 internal constant _INTERFACE_ID_ERC1363_APPROVE = 0xfb9ec8ce;
bytes4 private constant _ERC1363_RECEIVED = 0x88a7ca5c;
bytes4 private constant _ERC1363_APPROVED = 0x7b04a2d0;
constructor (
string memory name,
string memory symbol
) payable ERC20(name, symbol) {
_registerInterface(_INTERFACE_ID_ERC1363_TRANSFER);
_registerInterface(_INTERFACE_ID_ERC1363_APPROVE);
}
function transferAndCall(address to, uint256 value) public override returns (bool) {
return transferAndCall(to, value, "");
}
function transferAndCall(address to, uint256 value, bytes memory data) public override returns (bool) {
transfer(to, value);
require(_checkAndCallTransfer(_msgSender(), to, value, data), "ERC1363: _checkAndCallTransfer reverts");
return true;
}
function transferFromAndCall(address from, address to, uint256 value) public override returns (bool) {
return transferFromAndCall(from, to, value, "");
}
function transferFromAndCall(address from, address to, uint256 value, bytes memory data) public override returns (bool) {
transferFrom(from, to, value);
require(_checkAndCallTransfer(from, to, value, data), "ERC1363: _checkAndCallTransfer reverts");
return true;
}
function approveAndCall(address spender, uint256 value) public override returns (bool) {
return approveAndCall(spender, value, "");
}
function approveAndCall(address spender, uint256 value, bytes memory data) public override returns (bool) {
approve(spender, value);
require(_checkAndCallApprove(spender, value, data), "ERC1363: _checkAndCallApprove reverts");
return true;
}
function _checkAndCallTransfer(address from, address to, uint256 value, bytes memory data) internal returns (bool) {
if (!to.isContract()) {
return false;
}
bytes4 retval = IERC1363Receiver(to).onTransferReceived(
_msgSender(), from, value, data
);
return (retval == _ERC1363_RECEIVED);
}
function _checkAndCallApprove(address spender, uint256 value, bytes memory data) internal returns (bool) {
if (!spender.isContract()) {
return false;
}
bytes4 retval = IERC1363Spender(spender).onApprovalReceived(
_msgSender(), value, data
);
return (retval == _ERC1363_APPROVED);
}
}
library EnumerableSet {
struct Set {
bytes32[] _values;
mapping (bytes32 => uint256) _indexes;
}
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
function _remove(Set storage set, bytes32 value) private returns (bool) {
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) {
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
bytes32 lastvalue = set._values[lastIndex];
set._values[toDeleteIndex] = lastvalue;
set._indexes[lastvalue] = toDeleteIndex + 1;
set._values.pop();
delete set._indexes[value];
return true;
} else {
return false;
}
}
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
struct AddressSet {
Set _inner;
}
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(value)));
}
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(value)));
}
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(value)));
}
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint256(_at(set._inner, index)));
}
struct UintSet {
Set _inner;
}
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
abstract contract AccessControl is Context {
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
return _roles[role].members.at(index);
}
function getRoleAdmin(bytes32 role) public view returns (bytes32) {
return _roles[role].adminRole;
}
function grantRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");
_grantRole(role, account);
}
function revokeRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");
_revokeRole(role, account);
}
function renounceRole(bytes32 role, address account) public virtual {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
}
contract Roles is AccessControl {
bytes32 public constant MINTER_ROLE = keccak256("MINTER");
bytes32 public constant OPERATOR_ROLE = keccak256("OPERATOR");
constructor () {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(MINTER_ROLE, _msgSender());
_setupRole(OPERATOR_ROLE, _msgSender());
}
modifier onlyMinter() {
require(hasRole(MINTER_ROLE, _msgSender()), "Roles: caller does not have the MINTER role");
_;
}
modifier onlyOperator() {
require(hasRole(OPERATOR_ROLE, _msgSender()), "Roles: caller does not have the OPERATOR role");
_;
}
}
contract Ownable is Context {
address payable private _owner;
event OwnershipTransferred(address payable indexed previousOwner, address payable indexed newOwner);
constructor () {
address payable msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address payable) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address payable newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract TokenRecover is Ownable {
function recoverERC20(address tokenAddress, uint256 tokenAmount) public onlyOwner {
IERC20(tokenAddress).transfer(owner(), tokenAmount);
}
}
contract EcobankaToken is ERC20Capped, ERC20Burnable, ERC1363, Roles, TokenRecover {
using SafeMath for uint256;
bool private _mintingFinished = false;
bool private _transferEnabled = false;
bool private _paused = false;
uint256 private _rate = 215087879;
event MintFinished();
event TransferEnabled();
event Paused();
event PauseFinished();
modifier canMint() {
require(!_paused && !_mintingFinished, "EcobankaToken: minting not enabled");
_;
}
modifier canTransfer(address from) {
require(
!_paused && (_transferEnabled || hasRole(OPERATOR_ROLE, from)),
"EcobankaToken: transfer is not enabled or from does not have the OPERATOR role"
);
_;
}
constructor(
string memory name,
string memory symbol,
uint8 decimals,
uint256 cap,
uint256 rate,
uint256 initialSupply,
bool transferEnabled,
bool mintingFinished
)
ERC20Capped(cap)
ERC1363(name, symbol)
{
(
mintingFinished == false || cap == initialSupply,
"EcobankaToken: if finish minting, cap must be equal to initialSupply"
);
_rate = rate;
_setupDecimals(decimals);
if (initialSupply > 0) {
_mint(owner(), initialSupply);
}
if (mintingFinished) {
finishMinting();
}
if (transferEnabled) {
enableTransfer();
}
}
receive() external payable {
createTokens();
}
function crowdsaleRate() public view returns (uint256) {
return _rate;
}
function paused() public view returns (bool) {
return _paused;
}
function mintingFinished() public view returns (bool) {
return _mintingFinished;
}
function transferEnabled() public view returns (bool) {
return _transferEnabled;
}
function createTokens() payable public canMint {
require(msg.value > 0, "Value should be greater than zero");
uint256 tokens = msg.value.mul(_rate).div(1000000000000000000);
require(tokens > 0, "Tokens should be greater than zero");
_mint(msg.sender, tokens);
owner().transfer(msg.value);
}
function changeCrowdsaleRate(uint256 _value) public onlyOwner {
require(_value >= 1 , "Rate cant be zero");
_rate = _value;
}
function mint(address to, uint256 value) public canMint onlyMinter {
_mint(to, value);
}
function transfer(address to, uint256 value) public virtual override(ERC20) canTransfer(_msgSender()) returns (bool) {
return super.transfer(to, value);
}
function transferFrom(address from, address to, uint256 value) public virtual override(ERC20) canTransfer(from) returns (bool) {
return super.transferFrom(from, to, value);
}
function finishCrowdsale() public onlyOwner {
uint256 remainingTokens = cap().sub(totalSupply());
_mint(owner(), remainingTokens);
_mintingFinished = true;
emit MintFinished();
}
function finishMinting() public onlyOwner {
_mintingFinished = true;
emit MintFinished();
}
function pause() public onlyOwner {
_paused = true;
emit Paused();
}
function resume() public onlyOwner {
_paused = false;
emit PauseFinished();
}
function enableTransfer() public onlyOwner {
_transferEnabled = true;
emit TransferEnabled();
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override(ERC20, ERC20Capped) {
super._beforeTokenTransfer(from, to, amount);
}
}