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// This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023.
// SPDX-License-Identifier: MIT
pragma solidity 0.8.11;
interface ERC20 {
function allowance(address _owner, address spender) external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}
contract MultiBridge {
address public owner;
ERC20 public immutable token;
uint public immutable initBlock;
event BridgeAssistUpload(address indexed sender, uint256 amount, string target);
event Dispense(address indexed sender, uint256 amount);
event TransferOwnership(address indexed previousOwner, address indexed newOwner);
modifier restricted() {
require(msg.sender == owner, "Function restricted to owner");
_;
}
constructor(ERC20 _token) {
require(address(_token) != address(0), "Invalid token address");
token = _token;
owner = msg.sender;
initBlock = block.number;
}
function upload(uint256 amount, string memory target) external returns (bool success) {
require(amount > 0, "Wrong amount");
require(bytes(target).length != 0, "Incorrect target");
require(token.transferFrom(msg.sender, address(this), amount), "Failed to transferFrom");
emit BridgeAssistUpload(msg.sender, amount, target);
return true;
}
function dispense(address recipient, uint256 _amount) external restricted returns (bool success) {
require(_amount > 0, "Wrong amount");
require(recipient != address(0), "Incorrect recipient");
require(token.transfer(recipient, _amount), "Failed to transfer");
emit Dispense(recipient, _amount);
return true;
}
function transferOwnership(address _newOwner) external restricted {
require(_newOwner != address(0), "Invalid _newOwner address");
emit TransferOwnership(owner, _newOwner);
owner = _newOwner;
}
function infoBundle(address user) external view returns (ERC20 tok, uint256 all, uint256 bal) {
return (token, token.allowance(user, address(this)), token.balanceOf(user));
}
} |