Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- PriceFeed
- Optimization enabled
- true
- Compiler version
- v0.8.7+commit.e28d00a7
- Optimization runs
- 200
- EVM Version
- default
- Verified at
- 2024-09-26T15:33:47.192233Z
Contract source code
// SPDX-License-Identifier: No License (None)
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
_owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == msg.sender, "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract PriceFeed is Ownable {
address public system;
mapping(address => uint256) internal _price; // token price
event SetSystem(address _system);
event SetPrice(address token, uint256 price);
modifier onlyOwnerOrSystem() {
require(msg.sender == system || msg.sender == owner(), "Only system or owner");
_;
}
function setSystem(address _system) onlyOwner external
{
system = _system;
emit SetSystem(_system);
}
// returns token price in USD with 18 decimals
function getPrice(address token) external view returns(uint256 price) {
price = _price[token];
require(price != 0, "Incorrect price");
}
// set token price in USD with 18 decimals
function setPrice(address token, uint256 price) external onlyOwnerOrSystem {
_price[token] = price;
emit SetPrice(token, price);
}
// set tokens prices in USD with 18 decimals
function setPrices(address[] memory token, uint256[] memory price) external onlyOwnerOrSystem {
require(token.length == price.length, "Incorrect length");
for (uint i=0; i<token.length; i++) {
_price[token[i]] = price[i];
emit SetPrice(token[i], price[i]);
}
}
}
Contract ABI
[{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"SetPrice","inputs":[{"type":"address","name":"token","internalType":"address","indexed":false},{"type":"uint256","name":"price","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"SetSystem","inputs":[{"type":"address","name":"_system","internalType":"address","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"price","internalType":"uint256"}],"name":"getPrice","inputs":[{"type":"address","name":"token","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renounceOwnership","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setPrice","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"price","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setPrices","inputs":[{"type":"address[]","name":"token","internalType":"address[]"},{"type":"uint256[]","name":"price","internalType":"uint256[]"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setSystem","inputs":[{"type":"address","name":"_system","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"system","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]}]
Contract Creation Code
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