aramalipoor
commented
3 years ago For a PoC so far this is what I ended up with, but currently have 2 problems:
- How to generate replacementPattern?
-
Should this operation automatically list the sale order on OpenSea? If so I don't see it on testnets.opensea at least.
bytes constant emptyBytes = bytes(""); bytes constant replacementPattern = bytes(hex"000000000000000000000000000000000000000000000000000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000000000000000000000000000000000000000000000000000000000000000"); function putForSale( address owner, uint256 tokenId, uint256 salePrice ) public virtual isDirectory() { uint zero = 0; uint one = 1; address zeroAddr = address(0); bytes memory transferCalldata = abi.encodeWithSignature("transferFrom(address,address,uint256)", owner, zeroAddr, tokenId); address[7] memory addrs; uint[9] memory uints; { addrs = [ // Exchange address(_wyvernExchange), // Maker address(this), // Taker zeroAddr, // Fee Recipient _openSeaWallet, // Target (Asset Contract) address(_directory), // Static Target zeroAddr, // Token used to pay for the order, or the zero-address as a sentinel value for Ether zeroAddr ]; } { uints = [ // Maker Relayer Fee 500, // Taker Relayer Fee zero, // Maker Protocol Fee zero, // Taker Protocol Fee zero, // Base price of the order (in paymentTokens) salePrice, // Auction extra parameter - minimum bid increment for English auctions, starting/ending price difference zero, // Expiration timestamp - 0 for no expiry block.timestamp, zero, // Order salt, used to prevent duplicate hashes uint(keccak256(abi.encodePacked(block.difficulty, block.timestamp))) ]; } { _approveWyvernOrder( addrs, uints, transferCalldata ); } } function _approveWyvernOrder( address[7] memory addrs, uint[9] memory uints, bytes memory transferCalldata ) internal { _wyvernExchange.approveOrder_( addrs, uints, // Fee Method (split fee): Maker fees are deducted from the token amount that the maker receives. Taker fees are extra tokens that must be paid by the taker. WyvernExchangeInterface.FeeMethod.SplitFee, // Side (sell) WyvernExchangeInterface.Side.Sell, // Sale Kind (fixed price) WyvernExchangeInterface.SaleKind.FixedPrice, // How to call (call) WyvernExchangeInterface.HowToCall.Call, // Call Data transferCalldata, // Replacement Pattern replacementPattern, // staticExtradata emptyBytes, // orderbookInclusionDesired true ); }
Rotemy
priviprotocol
atsmsmr
Ghijo1
qaiszero
Hello there,
Thanks for the amazing platform! We're building a NFT platform with some special rules, because of these (specifically that "transferFrom" and "approve" cannot be called by owners themselves) we have to automatically list them on OpenSea.
From my understanding so far we need to call
approveOrder_from a contract who has the ability to do approve and transferFrom on those NFTs. We were thinking of having a "Marketer" contract which has a special access to do these operations on all NFTs on behalf of holders.Assuming, above is correct there are a few questions I have:
Thank you so much in advance :)