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// contracts/HighTableVault.sol
// SPDX-License-Identifier: BUSL
// Teahouse Finance
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/math/SafeCast.sol";
import "./IHighTableVault.sol";
/// @title An investment vault for working with TeaVaultV2
/// @author Teahouse Finance
contract HighTableVault is IHighTableVault, AccessControl, ERC20 {
    using SafeERC20 for IERC20;
    uint256 public constant SECONDS_IN_A_YEAR = 365 * 86400;             // for calculating management fee
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pragma solidity ^0.4.24;
// File: zos-lib/contracts/upgradeability/Proxy.sol
/**
 * @title Proxy
 * @dev Implements delegation of calls to other contracts, with proper
 * forwarding of return values and bubbling of failures.
 * It defines a fallback function that delegates all calls to the address
 * returned by the abstract _implementation() internal function.
 */
contract Proxy {
  /**
   * @dev Fallback function.
   * Implemented entirely in `_fallback`.
   */
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// File: @openzeppelin/contracts/math/SafeMath.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
 * @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.
 *
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// SPDX-License-Identifier: BUSL-1.1
// File: contracts/IPFSConvert.sol
// contracts/IPFSConvert.sol
pragma solidity ^0.8.0;
/// @title Hightable OG NFT
/// @author Teahouse Finance
library IPFSConvert {
    bytes constant private CODE_STRING = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
    bytes constant private CIDV0HEAD = 
        "\x00\x04\x28\x0b\x12\x17\x09\x28\x31\x00\x12\x04\x28\x20\x25\x25\x22\x31\x1b\x1d\x39\x29\x09\x26\x1b\x29\x0b\x02\x0a\x18\x25\x22\x24\x1b\x3
        9\x2c\x1d\x39\x07\x06\x29\x25\x13\x15\x2c\x17";
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// SPDX-License-Identifier: BUSL-1.1
// File: contracts/nft/IPFSConvert.sol
// contracts/IPFSConvert.sol
pragma solidity ^0.8.4;
/// @title Hightable IPFSConvert Library
/// @author Teahouse Finance
library IPFSConvert {
    bytes constant private CODE_STRING = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
    bytes constant private CIDV0HEAD = 
        "\x00\x04\x28\x0b\x12\x17\x09\x28\x31\x00\x12\x04\x28\x20\x25\x25\x22\x31\x1b\x1d\x39\x29\x09\x26\x1b\x29\x0b\x02\x0a\x18\x25\x22\x24\x1b\x3
        9\x2c\x1d\x39\x07\x06\x29\x25\x13\x15\x2c\x17";
    /**
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