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ERC20m.sol
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108 lines (97 loc) · 3.35 KB
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;
// ERC20 token implementation
import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@molecule-protocol/v2/interfaces/IMoleculeController.sol";
// custom errors
error AccountNotAllowedToMint(address minter);
error AccountNotAllowedToBurn(address burner);
error SenderNotAllowedToTransfer(address sender);
error RecipientNotAllowedToReceive(address receipient);
error OwnerNotAllowedToApprove(address owner);
// Molecule ERC20 token
contract ERC20m is ERC20, Ownable {
enum MoleculeType {
Approve,
Burn,
Mint,
Transfer
}
// Molecule address
address public _moleculeApprove;
address public _moleculeBurn;
address public _moleculeMint;
address public _moleculeTransfer;
event MoleculeUpdated(address molecule, MoleculeType mtype);
constructor(
string memory _tokenName,
string memory _tokenSymbol
) ERC20(_tokenName, _tokenSymbol) {}
function mint(address account, uint256 amount) external {
if (_moleculeMint != address(0)) {
if (!IMoleculeController(_moleculeMint).check(account)) {
revert AccountNotAllowedToMint(account);
}
}
_mint(account, amount);
}
function burn(address account, uint256 amount) external {
if (_moleculeBurn != address(0)) {
if (!IMoleculeController(_moleculeBurn).check(account)) {
revert AccountNotAllowedToBurn(account);
}
}
_burn(account, amount);
}
// Transfer function
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual override {
if (_moleculeTransfer != address(0)) {
if (!IMoleculeController(_moleculeTransfer).check(sender)) {
revert SenderNotAllowedToTransfer(sender);
}
if (!IMoleculeController(_moleculeTransfer).check(recipient)) {
revert RecipientNotAllowedToReceive(recipient);
}
}
super._transfer(sender, recipient, amount);
}
// Approve function
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual override {
if (_moleculeApprove != address(0)) {
if (!IMoleculeController(_moleculeApprove).check(owner)) {
revert OwnerNotAllowedToApprove(owner);
}
if (!IMoleculeController(_moleculeApprove).check(spender)) {
revert RecipientNotAllowedToReceive(spender);
}
}
super._approve(owner, spender, amount);
}
// Owner only functions
// Molecule ERC20 token
function updateMolecule(
address molecule,
MoleculeType mtype
) external onlyOwner {
// allows 0x0 address to be set to remove molecule access control
if (mtype == MoleculeType.Approve) {
_moleculeApprove = molecule;
} else if (mtype == MoleculeType.Burn) {
_moleculeBurn = molecule;
} else if (mtype == MoleculeType.Mint) {
_moleculeMint = molecule;
} else if (mtype == MoleculeType.Transfer) {
_moleculeTransfer = molecule;
}
emit MoleculeUpdated(molecule, mtype);
}
}