DCIPs/assets/eip-5633/contracts/ERC5633.sol

54 lines
1.5 KiB
Solidity

// SPDX-License-Identifier: CC0-1.0
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
import "./IERC5633.sol";
/**
* @dev Extension of ERC1155 that adds soulbound property per token id.
*
*/
abstract contract ERC5633 is ERC1155, IERC5633 {
mapping(uint256 => bool) private _soulbounds;
/// @dev See {IERC165-supportsInterface}.
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC1155) returns (bool) {
return interfaceId == type(IERC5633).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns true if a token type `id` is soulbound.
*/
function isSoulbound(uint256 id) public view virtual returns (bool) {
return _soulbounds[id];
}
function _setSoulbound(uint256 id, bool soulbound) internal {
_soulbounds[id] = soulbound;
emit Soulbound(id, soulbound);
}
/**
* @dev See {ERC1155-_beforeTokenTransfer}.
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual override {
super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
if (isSoulbound(ids[i])) {
require(
from == address(0) || to == address(0),
"ERC5633: Soulbound, Non-Transferable"
);
}
}
}
}