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