62 lines
2.0 KiB
Solidity
62 lines
2.0 KiB
Solidity
pragma solidity ^0.5.16;
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pragma experimental ABIEncoderV2;
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import "./Bucket.sol";
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import "./erc721/IERC721.sol";
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import "./erc721/IERC721Receiver.sol";
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import "./erc721/IERC165.sol";
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contract NFTBucket is Bucket, IERC165, IERC721Receiver {
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bytes4 private constant _ERC721_RECEIVED = 0x150b7a02; //bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))
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constructor(
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address _tokenAddress,
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uint256 _startTime,
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uint256 _expirationTime,
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uint256 _maxTxDelayInBlocks) Bucket("KeycardNFTBucket", _tokenAddress, _startTime, _expirationTime, _maxTxDelayInBlocks) public {}
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function transferRedeemable(uint256 data, Redeem memory redeem) internal {
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IERC721(tokenAddress).safeTransferFrom(address(this), redeem.receiver, data);
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}
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function transferRedeemablesToOwner() internal {
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IERC721(tokenAddress).setApprovalForAll(owner, true);
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assert(IERC721(tokenAddress).isApprovedForAll(address(this), owner));
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}
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function bucketType() external returns (uint256) {
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return 721;
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}
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function supportsInterface(bytes4 interfaceID) external view returns (bool) {
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return interfaceID == _ERC721_RECEIVED;
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}
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function onERC721Received(address _operator, address _from, uint256 _tokenID, bytes calldata _data) external returns(bytes4) {
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require(msg.sender == tokenAddress, "only the NFT contract can call this");
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require((_operator == owner) || (_from == owner), "only the owner can create redeemables");
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require(_data.length == 52, "invalid data field");
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bytes memory d = _data;
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bytes32 tmp;
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bytes32 code;
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assembly {
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// tmp is 12 bytes of padding (taken from the array length) + 20 bytes of address
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tmp := mload(add(d, 20))
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code := mload(add(d, 52))
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}
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address recipient = address(uint160(uint256(tmp)));
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Redeemable storage redeemable = redeemables[recipient];
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require(redeemable.recipient == address(0), "recipient already used");
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redeemable.recipient = recipient;
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redeemable.code = code;
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redeemable.data = _tokenID;
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return _ERC721_RECEIVED;
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}
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}
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