文件 1 的 7:AGLDFarm.sol
pragma solidity ^0.8.0;
import '@openzeppelin/contracts/utils/math/Math.sol';
import '@solidstate/contracts/token/ERC20/IERC20.sol';
import '@solidstate/contracts/utils/SafeERC20.sol';
import '../token/IMagic.sol';
contract AGLDFarm {
using SafeERC20 for IERC20;
address private immutable MAGIC;
address private immutable ADVENTURE_GOLD;
uint256 public immutable EXPIRATION;
uint256 private immutable RATE;
mapping(address => uint256) public depositBalances;
mapping(address => uint256) public depositBlocks;
constructor(
address magic,
address adventureGold,
uint256 rate,
uint256 expiration
) {
MAGIC = magic;
ADVENTURE_GOLD = adventureGold;
RATE = rate;
EXPIRATION = block.number + expiration;
}
function calculateRewards(address account)
public
view
returns (uint256 reward)
{
reward =
(RATE *
depositBalances[account] *
(Math.min(block.number, EXPIRATION) - depositBlocks[account])) /
(1 ether);
}
function claimRewards() public {
uint256 reward = calculateRewards(msg.sender);
if (reward > 0) {
IMagic(MAGIC).mint(msg.sender, reward);
}
depositBlocks[msg.sender] = Math.min(block.number, EXPIRATION);
}
function deposit(uint256 amount) external {
require(
IERC20(ADVENTURE_GOLD).balanceOf(address(this)) + amount <=
50e6 ether,
'AGLDFarm: deposit cap reached'
);
claimRewards();
IERC20(ADVENTURE_GOLD).safeTransferFrom(
msg.sender,
address(this),
amount
);
depositBalances[msg.sender] += amount;
}
function withdraw(uint256 amount) external {
require(
depositBalances[msg.sender] >= amount,
'AGLDFarm: insufficient balance'
);
claimRewards();
unchecked {
depositBalances[msg.sender] -= amount;
}
IERC20(ADVENTURE_GOLD).safeTransfer(msg.sender, amount);
}
}
文件 2 的 7:AddressUtils.sol
pragma solidity ^0.8.0;
library AddressUtils {
function toString (address account) internal pure returns (string memory) {
bytes32 value = bytes32(uint256(uint160(account)));
bytes memory alphabet = '0123456789abcdef';
bytes memory chars = new bytes(42);
chars[0] = '0';
chars[1] = 'x';
for (uint256 i = 0; i < 20; i++) {
chars[2 + i * 2] = alphabet[uint8(value[i + 12] >> 4)];
chars[3 + i * 2] = alphabet[uint8(value[i + 12] & 0x0f)];
}
return string(chars);
}
function isContract (address account) internal view returns (bool) {
uint size;
assembly { size := extcodesize(account) }
return size > 0;
}
function sendValue (address payable account, uint amount) internal {
(bool success, ) = account.call{ value: amount }('');
require(success, 'AddressUtils: failed to send value');
}
function functionCall (address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, 'AddressUtils: failed low-level call');
}
function functionCall (address target, bytes memory data, string memory error) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, error);
}
function functionCallWithValue (address target, bytes memory data, uint value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, 'AddressUtils: failed low-level call with value');
}
function functionCallWithValue (address target, bytes memory data, uint value, string memory error) internal returns (bytes memory) {
require(address(this).balance >= value, 'AddressUtils: insufficient balance for call');
return _functionCallWithValue(target, data, value, error);
}
function _functionCallWithValue (address target, bytes memory data, uint value, string memory error) private returns (bytes memory) {
require(isContract(target), 'AddressUtils: function call to non-contract');
(bool success, bytes memory returnData) = target.call{ value: value }(data);
if (success) {
return returnData;
} else if (returnData.length > 0) {
assembly {
let returnData_size := mload(returnData)
revert(add(32, returnData), returnData_size)
}
} else {
revert(error);
}
}
}
文件 3 的 7:IERC20.sol
pragma solidity ^0.8.0;
import {IERC20Internal} from './IERC20Internal.sol';
interface IERC20 is IERC20Internal {
function totalSupply () external view returns (uint256);
function balanceOf (
address account
) external view returns (uint256);
function allowance (
address holder,
address spender
) external view returns (uint256);
function approve (
address spender,
uint256 amount
) external returns (bool);
function transfer (
address recipient,
uint256 amount
) external returns (bool);
function transferFrom (
address holder,
address recipient,
uint256 amount
) external returns (bool);
}
文件 4 的 7:IERC20Internal.sol
pragma solidity ^0.8.0;
interface IERC20Internal {
event Transfer(
address indexed from,
address indexed to,
uint256 value
);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
文件 5 的 7:IMagic.sol
pragma solidity ^0.8.0;
import '@solidstate/contracts/token/ERC20/IERC20.sol';
interface IMagic is IERC20 {
function mint(address account, uint256 amount) external;
}
文件 6 的 7:Math.sol
pragma solidity ^0.8.0;
library Math {
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
function average(uint256 a, uint256 b) internal pure returns (uint256) {
return (a & b) + (a ^ b) / 2;
}
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b + (a % b == 0 ? 0 : 1);
}
}
文件 7 的 7:SafeERC20.sol
pragma solidity ^0.8.0;
import {IERC20} from '../token/ERC20/IERC20.sol';
import {AddressUtils} from './AddressUtils.sol';
library SafeERC20 {
using AddressUtils for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
function _callOptionalReturn(IERC20 token, bytes memory data) private {
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
{
"compilationTarget": {
"contracts/farm/AGLDFarm.sol": "AGLDFarm"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}
[{"inputs":[{"internalType":"address","name":"magic","type":"address"},{"internalType":"address","name":"adventureGold","type":"address"},{"internalType":"uint256","name":"rate","type":"uint256"},{"internalType":"uint256","name":"expiration","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"EXPIRATION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"calculateRewards","outputs":[{"internalType":"uint256","name":"reward","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"claimRewards","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"depositBalances","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"depositBlocks","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]