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ERC-20
Cross-Chain
Overview
Max Total Supply
1,000,000,000 BICO
Holders
16,125 ( 0.043%)
Market
Price
$0.25 @ 0.000093 ETH (-6.74%)
Onchain Market Cap
$249,586,237.60
Circulating Supply Market Cap
$207,452,282.42
Other Info
Token Contract (WITH 18 Decimals)
Balance
61.5 BICOValue
$15.35 ( ~0.00570995153095764 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | ![]() | BICO-USDT | $0.249 0.0000926 Eth | $1,685,778.00 6,549,007.170 BICO | 14.8424% |
2 | ![]() | BICO-USDT | $0.249 0.0000927 Eth | $1,232,938.00 4,789,131.090 BICO | 10.8539% |
3 | ![]() | BICO-USDT | $0.2465 0.0000917 Eth | $1,192,043.00 4,836,442.130 BICO | 10.9611% |
4 | ![]() | BICO-USDT | $0.2491 0.0000927 Eth | $1,164,303.00 4,511,524.670 BICO | 10.2247% |
5 | ![]() | BICO-USDT | $0.2491 0.0000927 Eth | $938,149.00 3,765,424.820 BICO | 8.5338% |
6 | ![]() | BICO-VNST | $0.248 0.0000924 Eth | $755,652.00 3,046,432.820 BICO | 6.9043% |
7 | ![]() | BICO-USDT | $0.2491 0.0000927 Eth | $681,633.00 2,649,304.160 BICO | 6.0043% |
8 | ![]() | BICO-USDT | $0.2492 0.0000927 Eth | $582,959.00 2,264,685.328 BICO | 5.1326% |
9 | ![]() | BICO-USDT | $0.249 0.0000926 Eth | $534,363.00 2,074,178.887 BICO | 4.7008% |
10 | ![]() | BICO-USD | $0.2494 0.0000928 Eth | $409,053.00 1,640,147.430 BICO | 3.7172% |
11 | ![]() | BICO-USDT | $0.249 0.0000926 Eth | $405,661.00 1,628,840.040 BICO | 3.6915% |
12 | ![]() | BICO-USDT | $0.2492 0.0000927 Eth | $350,878.00 1,407,742.152 BICO | 3.1904% |
13 | ![]() | BICO-USDT | $0.249 0.0000928 Eth | $255,716.00 1,026,910.860 BICO | 2.3273% |
14 | ![]() | BICO-USDT | $0.2495 0.0000928 Eth | $246,141.00 986,344.543 BICO | 2.2354% |
15 | ![]() | BICO-USDT | $0.2489 0.0000926 Eth | $232,077.00 901,777.310 BICO | 2.0438% |
16 | ![]() | BICO-USDT | $0.2494 0.0000928 Eth | $227,570.00 912,409.550 BICO | 2.0678% |
17 | ![]() | BICO-USDT | $0.2493 0.0000928 Eth | $214,568.00 860,435.440 BICO | 1.9501% |
18 | ![]() | BICO-USDT | $0.2493 0.0000928 Eth | $171,255.00 665,697.130 BICO | 1.5087% |
19 | ![]() | BICO-USDT | $0.2493 0.0000927 Eth | $143,326.00 574,885.127 BICO | 1.3029% |
20 | ![]() | BICO-USDT | $0.2489 0.0000926 Eth | $135,306.00 543,662.660 BICO | 1.2321% |
21 | ![]() | BICO-USDT | $0.2494 0.0000928 Eth | $100,898.00 391,937.950 BICO | 0.8883% |
22 | ![]() | BICO-USDT | $0.2489 0.0000927 Eth | $94,486.00 379,557.660 BICO | 0.8602% |
23 | ![]() | BICO-USDT | $0.2492 0.0000928 Eth | $93,680.00 375,870.000 BICO | 0.8519% |
24 | ![]() | BICO-USDT | $0.248 0.0000923 Eth | $81,406.00 328,213.526 BICO | 0.7438% |
25 | ![]() | BICO-EUR | $0.2504 0.0000932 Eth | $81,246.00 324,469.610 BICO | 0.7354% |
26 | ![]() | BICO-USDT | $0.2489 0.0000927 Eth | $74,245.00 298,249.899 BICO | 0.6759% |
27 | ![]() | BICO-USDT | $0.249 0.0000926 Eth | $63,870.00 247,592.450 BICO | 0.5611% |
28 | ![]() | BICO-BTC | $0.2482 0.0000923 Eth | $45,331.00 182,646.619 BICO | 0.4139% |
29 | ![]() | BICO-USDT | $0.2487 0.0000926 Eth | $43,680.00 169,587.800 BICO | 0.3843% |
30 | ![]() | BICO-USDT | $0.249 0.0000926 Eth | $42,720.00 166,016.067 BICO | 0.3763% |
31 | ![]() | BICO-USDT | $0.2495 0.0000929 Eth | $29,932.00 119,990.120 BICO | 0.2719% |
32 | ![]() | BICO-BTC | $0.2495 0.0000929 Eth | $19,661.13 76,905.210 BICO | 0.1743% |
33 | ![]() | BICO-EUR | $0.2498 0.0000930 Eth | $13,917.27 55,722.812 BICO | 0.1263% |
34 | ![]() | BICO-USDT | $0.2564 0.0000916 Eth | $12,348.51 48,164.481 BICO | 0.1092% |
35 | ![]() | BICO-USDT | $0.2493 0.0000928 Eth | $11,107.02 43,158.002 BICO | 0.0978% |
36 | ![]() | BICO-USDT | $0.2493 0.0000928 Eth | $10,460.56 41,951.500 BICO | 0.0951% |
37 | ![]() | BICO-USDT | $0.2492 0.0000927 Eth | $8,548.04 32,902.030 BICO | 0.0746% |
38 | ![]() | BICO-USDT | $0.249 0.0000927 Eth | $5,422.57 21,007.835 BICO | 0.0476% |
39 | ![]() | BICO-USDT | $0.2486 0.0000925 Eth | $4,986.93 20,057.710 BICO | 0.0455% |
40 | ![]() | 0XF17E65822B568B3903685A7C9F496CF7656CC6C2-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.2516 0.0000936 Eth | $2,894.91 11,424.285 0XF17E65822B568B3903685A7C9F496CF7656CC6C2 | 0.0259% |
41 | ![]() | BICO-USDT | $0.2484 0.0000925 Eth | $2,606.99 10,106.540 BICO | 0.0229% |
42 | ![]() | BICO-USD | $0.2491 0.0000927 Eth | $2,446.32 9,822.600 BICO | 0.0223% |
43 | ![]() | BICO-IDR | $0.2519 0.0000938 Eth | $2,299.88 9,130.256 BICO | 0.0207% |
44 | ![]() | BICO-USD | $0.2503 0.0000931 Eth | $2,267.91 9,060.761 BICO | 0.0205% |
45 | ![]() | BICO-USDC | $0.2499 0.0000930 Eth | $2,246.41 8,743.866 BICO | 0.0198% |
46 | ![]() | BICO-USDT | $0.249 0.0000926 Eth | $1,569.94 6,304.000 BICO | 0.0143% |
47 | ![]() | 0XF17E65822B568B3903685A7C9F496CF7656CC6C2-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.2522 0.0000937 Eth | $1,505.31 5,952.737 0XF17E65822B568B3903685A7C9F496CF7656CC6C2 | 0.0135% |
48 | ![]() | 0XF17E65822B568B3903685A7C9F496CF7656CC6C2-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.2519 0.0000938 Eth | $1,239.86 4,903.720 0XF17E65822B568B3903685A7C9F496CF7656CC6C2 | 0.0111% |
49 | ![]() | BICO-INR | $0.2559 0.0000953 Eth | $694.50 0.000 BICO | 0.0000% |
50 | ![]() | BICO-USDT | $0.2495 0.0000929 Eth | $420.38 1,684.689 BICO | 0.0038% |
51 | ![]() | BICO-USDT | $0.2494 0.0000928 Eth | $379.68 1,522.531 BICO | 0.0035% |
52 | ![]() | BICO-EUR | $0.2592 0.0000964 Eth | $319.51 1,232.616 BICO | 0.0028% |
53 | ![]() | BICO-ETH | $0.2498 0.0000929 Eth | $286.95 1,141.209 BICO | 0.0026% |
54 | ![]() | BICO-GBP | $0.2702 0.0001007 Eth | $162.13 600.000 BICO | 0.0014% |
55 | ![]() | BICO-AUD | $0.2698 0.0001005 Eth | $161.86 600.000 BICO | 0.0014% |
56 | ![]() | BICO-USDC | $0.278 0.0001034 Eth | $138.99 500.000 BICO | 0.0011% |
57 | ![]() | BICO-USD | $0.2501 0.0000931 Eth | $106.34 425.174 BICO | 0.0010% |
58 | ![]() | BICO-BTC | $0.2492 0.0000927 Eth | $59.78 232.678 BICO | 0.0005% |
59 | ![]() | BICO-IDR | $0.2497 0.0000930 Eth | $58.24 224.500 BICO | 0.0005% |
60 | ![]() | BICO-USD | $0.2723 0.0000970 Eth | $27.23 100.000 BICO | 0.0002% |
61 | ![]() | BICO-BRL | $0.2582 0.0000961 Eth | $18.25 70.673 BICO | 0.0002% |
62 | ![]() | BICO-BTC | $0.2723 0.0000972 Eth | $8.02 29.445 BICO | 0.0001% |
63 | ![]() | BICO-USDT | $0.2567 0.0000955 Eth | $6.35 24.759 BICO | 0.0001% |
64 | ![]() | BICO-USDT | $0.2723 0.0000992 Eth | $1.00 3.673 BICO | 0.0000% |
65 | ![]() | BICO-USDT | $0.2489 0.0000927 Eth | $0.005 0.020 BICO | 0.0000% |
66 | ![]() | BICO-USDT | $0.2494 0.0000928 Eth | $0.0025 0.010 BICO | 0.0000% |
67 | ![]() | BICO-USDT | $0.2494 0.0000928 Eth | $0.0025 0.010 BICO | 0.0000% |
Contract Name:
BicoTokenProxy
Compiler Version
v0.8.4+commit.c7e474f2
Contract Source Code (Solidity)Audit Report
/** *Submitted for verification at Etherscan.io on 2021-10-04 */ // Sources flattened with hardhat v2.6.4 https://hardhat.org // File @openzeppelin/contracts/proxy/[email protected] // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to * be specified by overriding the virtual {_implementation} function. * * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a * different contract through the {_delegate} function. * * The success and return data of the delegated call will be returned back to the caller of the proxy. */ abstract contract Proxy { /** * @dev Delegates the current call to `implementation`. * * This function does not return to its internall call site, it will return directly to the external caller. */ function _delegate(address implementation) internal virtual { assembly { // Copy msg.data. We take full control of memory in this inline assembly // block because it will not return to Solidity code. We overwrite the // Solidity scratch pad at memory position 0. calldatacopy(0, 0, calldatasize()) // Call the implementation. // out and outsize are 0 because we don't know the size yet. let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0) // Copy the returned data. returndatacopy(0, 0, returndatasize()) switch result // delegatecall returns 0 on error. case 0 { revert(0, returndatasize()) } default { return(0, returndatasize()) } } } /** * @dev This is a virtual function that should be overriden so it returns the address to which the fallback function * and {_fallback} should delegate. */ function _implementation() internal view virtual returns (address); /** * @dev Delegates the current call to the address returned by `_implementation()`. * * This function does not return to its internall call site, it will return directly to the external caller. */ function _fallback() internal virtual { _beforeFallback(); _delegate(_implementation()); } /** * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other * function in the contract matches the call data. */ fallback() external payable virtual { _fallback(); } /** * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data * is empty. */ receive() external payable virtual { _fallback(); } /** * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback` * call, or as part of the Solidity `fallback` or `receive` functions. * * If overriden should call `super._beforeFallback()`. */ function _beforeFallback() internal virtual {} } // File @openzeppelin/contracts/proxy/beacon/[email protected] pragma solidity ^0.8.0; /** * @dev This is the interface that {BeaconProxy} expects of its beacon. */ interface IBeacon { /** * @dev Must return an address that can be used as a delegate call target. * * {BeaconProxy} will check that this address is a contract. */ function implementation() external view returns (address); } // File @openzeppelin/contracts/utils/[email protected] pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ 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"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @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 { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File @openzeppelin/contracts/utils/[email protected] pragma solidity ^0.8.0; /** * @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 } } } // File @openzeppelin/contracts/proxy/ERC1967/[email protected] pragma solidity ^0.8.2; /** * @dev This abstract contract provides getters and event emitting update functions for * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots. * * _Available since v4.1._ * * @custom:oz-upgrades-unsafe-allow delegatecall */ abstract contract ERC1967Upgrade { // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1 bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143; /** * @dev Storage slot with the address of the current implementation. * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is * validated in the constructor. */ bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; /** * @dev Emitted when the implementation is upgraded. */ event Upgraded(address indexed implementation); /** * @dev Returns the current implementation address. */ function _getImplementation() internal view returns (address) { return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; } /** * @dev Stores a new address in the EIP1967 implementation slot. */ function _setImplementation(address newImplementation) private { require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract"); StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; } /** * @dev Perform implementation upgrade * * Emits an {Upgraded} event. */ function _upgradeTo(address newImplementation) internal { _setImplementation(newImplementation); emit Upgraded(newImplementation); } /** * @dev Perform implementation upgrade with additional setup call. * * Emits an {Upgraded} event. */ function _upgradeToAndCall( address newImplementation, bytes memory data, bool forceCall ) internal { _upgradeTo(newImplementation); if (data.length > 0 || forceCall) { Address.functionDelegateCall(newImplementation, data); } } /** * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call. * * Emits an {Upgraded} event. */ function _upgradeToAndCallSecure( address newImplementation, bytes memory data, bool forceCall ) internal { address oldImplementation = _getImplementation(); // Initial upgrade and setup call _setImplementation(newImplementation); if (data.length > 0 || forceCall) { Address.functionDelegateCall(newImplementation, data); } // Perform rollback test if not already in progress StorageSlot.BooleanSlot storage rollbackTesting = StorageSlot.getBooleanSlot(_ROLLBACK_SLOT); if (!rollbackTesting.value) { // Trigger rollback using upgradeTo from the new implementation rollbackTesting.value = true; Address.functionDelegateCall( newImplementation, abi.encodeWithSignature("upgradeTo(address)", oldImplementation) ); rollbackTesting.value = false; // Check rollback was effective require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades"); // Finally reset to the new implementation and log the upgrade _upgradeTo(newImplementation); } } /** * @dev Storage slot with the admin of the contract. * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is * validated in the constructor. */ bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103; /** * @dev Emitted when the admin account has changed. */ event AdminChanged(address previousAdmin, address newAdmin); /** * @dev Returns the current admin. */ function _getAdmin() internal view returns (address) { return StorageSlot.getAddressSlot(_ADMIN_SLOT).value; } /** * @dev Stores a new address in the EIP1967 admin slot. */ function _setAdmin(address newAdmin) private { require(newAdmin != address(0), "ERC1967: new admin is the zero address"); StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin; } /** * @dev Changes the admin of the proxy. * * Emits an {AdminChanged} event. */ function _changeAdmin(address newAdmin) internal { emit AdminChanged(_getAdmin(), newAdmin); _setAdmin(newAdmin); } /** * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy. * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor. */ bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50; /** * @dev Emitted when the beacon is upgraded. */ event BeaconUpgraded(address indexed beacon); /** * @dev Returns the current beacon. */ function _getBeacon() internal view returns (address) { return StorageSlot.getAddressSlot(_BEACON_SLOT).value; } /** * @dev Stores a new beacon in the EIP1967 beacon slot. */ function _setBeacon(address newBeacon) private { require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract"); require( Address.isContract(IBeacon(newBeacon).implementation()), "ERC1967: beacon implementation is not a contract" ); StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon; } /** * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that). * * Emits a {BeaconUpgraded} event. */ function _upgradeBeaconToAndCall( address newBeacon, bytes memory data, bool forceCall ) internal { _setBeacon(newBeacon); emit BeaconUpgraded(newBeacon); if (data.length > 0 || forceCall) { Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data); } } } // File @openzeppelin/contracts/proxy/ERC1967/[email protected] pragma solidity ^0.8.0; /** * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an * implementation address that can be changed. This address is stored in storage in the location specified by * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the * implementation behind the proxy. */ contract ERC1967Proxy is Proxy, ERC1967Upgrade { /** * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`. * * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded * function call, and allows initializating the storage of the proxy like a Solidity constructor. */ constructor(address _logic, bytes memory _data) payable { assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1)); _upgradeToAndCall(_logic, _data, false); } /** * @dev Returns the current implementation address. */ function _implementation() internal view virtual override returns (address impl) { return ERC1967Upgrade._getImplementation(); } } // File @openzeppelin/contracts/proxy/transparent/[email protected] pragma solidity ^0.8.0; /** * @dev This contract implements a proxy that is upgradeable by an admin. * * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector * clashing], which can potentially be used in an attack, this contract uses the * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two * things that go hand in hand: * * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if * that call matches one of the admin functions exposed by the proxy itself. * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the * implementation. If the admin tries to call a function on the implementation it will fail with an error that says * "admin cannot fallback to proxy target". * * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due * to sudden errors when trying to call a function from the proxy implementation. * * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way, * you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy. */ contract TransparentUpgradeableProxy is ERC1967Proxy { /** * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and * optionally initialized with `_data` as explained in {ERC1967Proxy-constructor}. */ constructor( address _logic, address admin_, bytes memory _data ) payable ERC1967Proxy(_logic, _data) { assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1)); _changeAdmin(admin_); } /** * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin. */ modifier ifAdmin() { if (msg.sender == _getAdmin()) { _; } else { _fallback(); } } /** * @dev Returns the current admin. * * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyAdmin}. * * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call. * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103` */ function admin() external ifAdmin returns (address admin_) { admin_ = _getAdmin(); } /** * @dev Returns the current implementation. * * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyImplementation}. * * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call. * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc` */ function implementation() external ifAdmin returns (address implementation_) { implementation_ = _implementation(); } /** * @dev Changes the admin of the proxy. * * Emits an {AdminChanged} event. * * NOTE: Only the admin can call this function. See {ProxyAdmin-changeProxyAdmin}. */ function changeAdmin(address newAdmin) external virtual ifAdmin { _changeAdmin(newAdmin); } /** * @dev Upgrade the implementation of the proxy. * * NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}. */ function upgradeTo(address newImplementation) external ifAdmin { _upgradeToAndCall(newImplementation, bytes(""), false); } /** * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the * proxied contract. * * NOTE: Only the admin can call this function. See {ProxyAdmin-upgradeAndCall}. */ function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin { _upgradeToAndCall(newImplementation, data, true); } /** * @dev Returns the current admin. */ function _admin() internal view virtual returns (address) { return _getAdmin(); } /** * @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}. */ function _beforeFallback() internal virtual override { require(msg.sender != _getAdmin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target"); super._beforeFallback(); } } // File contracts/bico-token/bico/BicoTokenProxy.sol // contracts/bico-token/bico/BicoToken.sol pragma solidity ^0.8.0; /** * @dev This contract implements a proxy that is upgradeable by an admin. * * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector * clashing], which can potentially be used in an attack, this contract uses the * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two * things that go hand in hand: * * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if * that call matches one of the admin functions exposed by the proxy itself. * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the * implementation. If the admin tries to call a function on the implementation it will fail with an error that says * "admin cannot fallback to proxy target". * * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due * to sudden errors when trying to call a function from the proxy implementation. * * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way, * you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy. */ contract BicoTokenProxy is TransparentUpgradeableProxy { constructor (address _implementation,address _admin) TransparentUpgradeableProxy(_implementation,_admin,bytes("")) { } function getAdmin() external view returns (address adm) { bytes32 slot = _ADMIN_SLOT; assembly { adm := sload(slot) } } function getImplementation() external view returns (address impl) { bytes32 slot = _IMPLEMENTATION_SLOT; assembly { impl := sload(slot) } } }
Contract Security Audit
- Halborn- Oct 9th ,2021 - Security Audit Report
[{"inputs":[{"internalType":"address","name":"_implementation","type":"address"},{"internalType":"address","name":"_admin","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"previousAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"beacon","type":"address"}],"name":"BeaconUpgraded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"admin_","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"changeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getAdmin","outputs":[{"internalType":"address","name":"adm","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getImplementation","outputs":[{"internalType":"address","name":"impl","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"implementation_","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"}],"name":"upgradeTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"stateMutability":"payable","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000054ea46e513dc406417aafb169a7b9d2efac31ffe0000000000000000000000002a2d6e4919ff1519e3d7ede8e44164025654bce3
-----Decoded View---------------
Arg [0] : _implementation (address): 0x54EA46E513dc406417aAFB169A7b9d2EFaC31fFE
Arg [1] : _admin (address): 0x2a2D6e4919FF1519E3D7EDe8E44164025654bCe3
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000054ea46e513dc406417aafb169a7b9d2efac31ffe
Arg [1] : 0000000000000000000000002a2d6e4919ff1519e3d7ede8e44164025654bce3
Deployed Bytecode Sourcemap
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Swarm Source
ipfs://020c310151a09db3d7f1457eb36ae99c6caf6930261aa09f3c33a69f74e3f320
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