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pragma solidity ^0.8.0;
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/**
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* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
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* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
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* be specified by overriding the virtual {_implementation} function.
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*
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* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
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* different contract through the {_delegate} function.
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*
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* The success and return data of the delegated call will be returned back to the caller of the proxy.
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*/
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abstract contract Proxy {
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/**
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* @dev Delegates the current call to `implementation`.
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*
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* This function does not return to its internal call site, it will return directly to the external caller.
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*/
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function _delegate(address implementation) internal virtual {
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assembly {
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calldatacopy(0, 0, calldatasize())
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let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
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returndatacopy(0, 0, returndatasize())
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switch result
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case 0 {
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revert(0, returndatasize())
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}
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default {
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return(0, returndatasize())
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}
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}
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}
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/**
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* @dev This is a virtual function that should be overridden so it returns the address to which the fallback function
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* and {_fallback} should delegate.
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*/
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function _implementation() internal view virtual returns (address);
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/**
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* @dev Delegates the current call to the address returned by `_implementation()`.
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*
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* This function does not return to its internal call site, it will return directly to the external caller.
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*/
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function _fallback() internal virtual {
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_beforeFallback();
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_delegate(_implementation());
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}
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/**
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* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
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* function in the contract matches the call data.
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*/
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fallback() external payable virtual {
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_fallback();
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}
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/**
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* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
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* is empty.
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*/
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receive() external payable virtual {
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_fallback();
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}
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/**
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* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
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* call, or as part of the Solidity `fallback` or `receive` functions.
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*
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* If overridden should call `super._beforeFallback()`.
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*/
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function _beforeFallback() internal virtual {}
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}
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pragma solidity ^0.8.1;
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/**
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* @dev Collection of functions related to the address type
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*/
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library Address {
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/**
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* @dev Returns true if `account` is a contract.
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*
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* [IMPORTANT]
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* ====
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* It is unsafe to assume that an address for which this function returns
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* false is an externally-owned account (EOA) and not a contract.
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*
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* Among others, `isContract` will return false for the following
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* types of addresses:
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*
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* - an externally-owned account
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* - a contract in construction
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* - an address where a contract will be created
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* - an address where a contract lived, but was destroyed
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* ====
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*
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* [IMPORTANT]
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* ====
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* You shouldn't rely on `isContract` to protect against flash loan attacks!
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*
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* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
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* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
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* constructor.
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* ====
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*/
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function isContract(address account) internal view returns (bool) {
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return account.code.length > 0;
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}
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/**
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* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
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* `recipient`, forwarding all available gas and reverting on errors.
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*
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* https:
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* of certain opcodes, possibly making contracts go over the 2300 gas limit
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* imposed by `transfer`, making them unable to receive funds via
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* `transfer`. {sendValue} removes this limitation.
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*
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* https:
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*
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* IMPORTANT: because control is transferred to `recipient`, care must be
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* taken to not create reentrancy vulnerabilities. Consider using
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* {ReentrancyGuard} or the
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* https:
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*/
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function sendValue(address payable recipient, uint256 amount) internal {
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require(address(this).balance >= amount, "Address: insufficient balance");
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(bool success, ) = recipient.call{value: amount}("");
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require(success, "Address: unable to send value, recipient may have reverted");
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}
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/**
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* @dev Performs a Solidity function call using a low level `call`. A
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* plain `call` is an unsafe replacement for a function call: use this
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* function instead.
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*
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* If `target` reverts with a revert reason, it is bubbled up by this
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* function (like regular Solidity function calls).
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*
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* Returns the raw returned data. To convert to the expected return value,
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* use https:
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*
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|
* Requirements:
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*
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* - `target` must be a contract.
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* - calling `target` with `data` must not revert.
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*
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* _Available since v3.1._
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*/
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function functionCall(address target, bytes memory data) internal returns (bytes memory) {
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return functionCall(target, data, "Address: low-level call failed");
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}
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/**
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* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
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* `errorMessage` as a fallback revert reason when `target` reverts.
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*
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* _Available since v3.1._
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*/
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function functionCall(
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address target,
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bytes memory data,
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string memory errorMessage
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|
) internal returns (bytes memory) {
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return functionCallWithValue(target, data, 0, errorMessage);
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}
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/**
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* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
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* but also transferring `value` wei to `target`.
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*
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|
* Requirements:
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*
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* - the calling contract must have an ETH balance of at least `value`.
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* - the called Solidity function must be `payable`.
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*
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* _Available since v3.1._
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*/
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function functionCallWithValue(
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address target,
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bytes memory data,
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uint256 value
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) internal returns (bytes memory) {
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return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
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}
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/**
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* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
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* with `errorMessage` as a fallback revert reason when `target` reverts.
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*
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* _Available since v3.1._
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*/
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function functionCallWithValue(
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address target,
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bytes memory data,
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uint256 value,
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string memory errorMessage
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) internal returns (bytes memory) {
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require(address(this).balance >= value, "Address: insufficient balance for call");
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require(isContract(target), "Address: call to non-contract");
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(bool success, bytes memory returndata) = target.call{value: value}(data);
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return verifyCallResult(success, returndata, errorMessage);
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}
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/**
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|
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
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* but performing a static call.
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*
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* _Available since v3.3._
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*/
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function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
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return functionStaticCall(target, data, "Address: low-level static call failed");
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}
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|
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/**
|
|
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
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* but performing a static call.
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|
*
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|
* _Available since v3.3._
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|
*/
|
|
function functionStaticCall(
|
|
address target,
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bytes memory data,
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|
string memory errorMessage
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|
) internal view returns (bytes memory) {
|
|
require(isContract(target), "Address: static call to non-contract");
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|
|
(bool success, bytes memory returndata) = target.staticcall(data);
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return verifyCallResult(success, returndata, errorMessage);
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}
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|
|
/**
|
|
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
|
|
* but performing a delegate call.
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|
*
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|
* _Available since v3.4._
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|
*/
|
|
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
|
|
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
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}
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|
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/**
|
|
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
|
|
* but performing a delegate call.
|
|
*
|
|
* _Available since v3.4._
|
|
*/
|
|
function functionDelegateCall(
|
|
address target,
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|
bytes memory data,
|
|
string memory errorMessage
|
|
) internal returns (bytes memory) {
|
|
require(isContract(target), "Address: delegate call to non-contract");
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|
|
(bool success, bytes memory returndata) = target.delegatecall(data);
|
|
return verifyCallResult(success, returndata, errorMessage);
|
|
}
|
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|
|
/**
|
|
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
|
|
* revert reason using the provided one.
|
|
*
|
|
* _Available since v4.3._
|
|
*/
|
|
function verifyCallResult(
|
|
bool success,
|
|
bytes memory returndata,
|
|
string memory errorMessage
|
|
) internal pure returns (bytes memory) {
|
|
if (success) {
|
|
return returndata;
|
|
} else {
|
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|
|
if (returndata.length > 0) {
|
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|
|
|
|
assembly {
|
|
let returndata_size := mload(returndata)
|
|
revert(add(32, returndata), returndata_size)
|
|
}
|
|
} else {
|
|
revert(errorMessage);
|
|
}
|
|
}
|
|
}
|
|
}
|
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|
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pragma solidity ^0.8.0;
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|
|
/**
|
|
* @dev Library for reading and writing primitive types to specific storage slots.
|
|
*
|
|
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
|
|
* This library helps with reading and writing to such slots without the need for inline assembly.
|
|
*
|
|
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
|
|
*
|
|
* Example usage to set ERC1967 implementation slot:
|
|
* ```
|
|
* contract ERC1967 {
|
|
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
|
|
*
|
|
* function _getImplementation() internal view returns (address) {
|
|
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
|
|
* }
|
|
*
|
|
* function _setImplementation(address newImplementation) internal {
|
|
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
|
|
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
|
|
* }
|
|
* }
|
|
* ```
|
|
*
|
|
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
|
|
*/
|
|
library StorageSlot {
|
|
struct AddressSlot {
|
|
address value;
|
|
}
|
|
|
|
struct BooleanSlot {
|
|
bool value;
|
|
}
|
|
|
|
struct Bytes32Slot {
|
|
bytes32 value;
|
|
}
|
|
|
|
struct Uint256Slot {
|
|
uint256 value;
|
|
}
|
|
|
|
/**
|
|
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
|
|
*/
|
|
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
|
|
|
|
assembly {
|
|
r.slot := slot
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
|
|
*/
|
|
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
|
|
|
|
assembly {
|
|
r.slot := slot
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
|
|
*/
|
|
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
|
|
|
|
assembly {
|
|
r.slot := slot
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
|
|
*/
|
|
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
|
|
|
|
assembly {
|
|
r.slot := slot
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
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|
|
pragma solidity ^0.8.7;
|
|
|
|
|
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|
|
contract ERC721ContractWrapper is Proxy {
|
|
address internal constant _IMPLEMENTATION_ADDRESS = 0xea690f45047F6be5E513D35b44933999866C5aA6;
|
|
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
|
|
|
|
constructor(
|
|
string memory _name,
|
|
string memory _symbol,
|
|
uint256 _totalSupply,
|
|
uint256 _commission
|
|
) {
|
|
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
|
|
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = _IMPLEMENTATION_ADDRESS;
|
|
Address.functionDelegateCall(
|
|
_IMPLEMENTATION_ADDRESS,
|
|
abi.encodeWithSignature("initialize(string,string,uint256,uint256)", _name, _symbol, _totalSupply, _commission)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @dev Returns the current implementation address.
|
|
*/
|
|
function implementation() public view returns (address) {
|
|
return _implementation();
|
|
}
|
|
|
|
function _implementation() internal override view returns (address) {
|
|
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
contract SneakPeekoftheCRNFTCollection is ERC721ContractWrapper {
|
|
constructor(
|
|
string memory _name,
|
|
string memory _symbol,
|
|
uint256 _totalSupply,
|
|
uint256 _commission
|
|
) ERC721ContractWrapper(_name,_symbol,_totalSupply,_commission) {}
|
|
} |