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EtheriaWrapper-v0pt9_0x4b1.sol
325 lines (288 loc) · 27.4 KB
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EtheriaWrapper-v0pt9_0x4b1.sol
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// Solidity 0.8.7-e28d00a7 optimization 200 (default)
// verified with etherscan
// address: 0x4b1705c75fde41e35e454ddd14e5d0a0eac06280
/*
{
"73292671": "finishWrap(uint8,uint8)",
"ec340826": "_baseTokenExtension()",
"cfc86f7b": "_baseTokenURI()",
"2155abf5": "_etheria()",
"5e0b0092": "_etheriaAddress()",
"0cd5188f": "acceptOfferViaWrapper(uint8,uint8)",
"095ea7b3": "approve(address,uint256)",
"70a08231": "balanceOf(address)",
"f2a75fe4": "empty()",
"081812fc": "getApproved(uint256)",
"4abc2fec": "getWrapInitializer(uint8,uint8)",
"e985e9c5": "isApprovedForAll(address,address)",
"695d7832": "makeOfferViaWrapper(uint8,uint8)",
"06fdde03": "name()",
"8da5cb5b": "owner()",
"6352211e": "ownerOf(uint256)",
"2067c8e5": "rejectOfferViaWrapper(uint8,uint8)",
"715018a6": "renounceOwnership()",
"42842e0e": "safeTransferFrom(address,address,uint256)",
"b88d4fde": "safeTransferFrom(address,address,uint256,bytes)",
"a22cb465": "setApprovalForAll(address,bool)",
"30176e13": "setBaseTokenURI(string)",
"7b0cf1ef": "setNameViaWrapper(uint8,uint8,string)",
"5502e148": "setStatusViaWrapper(uint8,uint8,string)",
"147c0718": "setTokenExtension(string)",
"01ffc9a7": "supportsInterface(bytes4)",
"95d89b41": "symbol()",
"c87b56dd": "tokenURI(uint256)",
"23b872dd": "transferFrom(address,address,uint256)",
"f2fde38b": "transferOwnership(address)",
"98caef28": "wrapInitializers(uint256)"
}
var wrapperAddressV0pt9 = "0x4b1705c75fde41e35e454ddd14e5d0a0eac06280";
var wrapperAbiV0pt9 = [{"inputs":[],"stateMutability":"payable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"addr","type":"address"},{"indexed":true,"internalType":"uint256","name":"_locationID","type":"uint256"},{"indexed":false,"internalType":"string","name":"name","type":"string"}],"name":"NameSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"addr","type":"address"},{"indexed":true,"internalType":"uint256","name":"_locationID","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"offer","type":"uint256"},{"indexed":false,"internalType":"address","name":"offerer","type":"address"}],"name":"OfferRejected","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"addr","type":"address"},{"indexed":true,"internalType":"uint256","name":"_locationID","type":"uint256"}],"name":"OfferRetracted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"addr","type":"address"},{"indexed":true,"internalType":"uint256","name":"_locationID","type":"uint256"},{"indexed":false,"internalType":"string","name":"status","type":"string"}],"name":"StatusSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"addr","type":"address"},{"indexed":true,"internalType":"uint256","name":"_locationID","type":"uint256"}],"name":"Unwrapped","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"addr","type":"address"},{"indexed":true,"internalType":"uint256","name":"_locationID","type":"uint256"}],"name":"WrapFinished","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"addr","type":"address"},{"indexed":true,"internalType":"uint256","name":"_locationID","type":"uint256"}],"name":"WrapStarted","type":"event"},{"inputs":[],"name":"_baseTokenExtension","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_baseTokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_etheria","outputs":[{"internalType":"contract Etheria","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_etheriaAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint8","name":"col","type":"uint8"},{"internalType":"uint8","name":"row","type":"uint8"}],"name":"acceptOfferViaWrapper","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"empty","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint8","name":"col","type":"uint8"},{"internalType":"uint8","name":"row","type":"uint8"}],"name":"finishWrap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint8","name":"col","type":"uint8"},{"internalType":"uint8","name":"row","type":"uint8"}],"name":"getWrapInitializer","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint8","name":"col","type":"uint8"},{"internalType":"uint8","name":"row","type":"uint8"}],"name":"makeOfferViaWrapper","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint8","name":"col","type":"uint8"},{"internalType":"uint8","name":"row","type":"uint8"}],"name":"rejectOfferViaWrapper","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"__baseTokenURI","type":"string"}],"name":"setBaseTokenURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint8","name":"col","type":"uint8"},{"internalType":"uint8","name":"row","type":"uint8"},{"internalType":"string","name":"_n","type":"string"}],"name":"setNameViaWrapper","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint8","name":"col","type":"uint8"},{"internalType":"uint8","name":"row","type":"uint8"},{"internalType":"string","name":"_n","type":"string"}],"name":"setStatusViaWrapper","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"string","name":"__baseTokenExtension","type":"string"}],"name":"setTokenExtension","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"wrapInitializers","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}];
var wrapperV0pt9 = new web3.eth.Contract(wrapperAbiV0pt9,wrapperAddressV0pt9);
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;
import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
interface Etheria {
function getOwner(uint8 col, uint8 row) external view returns(address);
function getOfferers(uint8 col, uint8 row) external view returns (address[] memory);
function getOffers(uint8 col, uint8 row) external view returns (uint[] memory);
function setName(uint8 col, uint8 row, string memory _n) external;
function setStatus(uint8 col, uint8 row, string memory _s) external payable;
function makeOffer(uint8 col, uint8 row) external payable;
function rejectOffer(uint8 col, uint8 row, uint8 index) external;
function acceptOffer(uint8 col, uint8 row, uint8 index) external;
}
contract EtheriaWrapper0pt9 is Ownable, ERC721 {
address public _etheriaAddress;
Etheria public _etheria;
mapping (uint256 => address) public wrapInitializers;
constructor() payable ERC721("Etheria Wrapper v0pt9 2015-10-19", "EW09") {
_etheriaAddress = 0xe468D26721b703D224d05563cB64746A7A40E1F4;
_etheria = Etheria(_etheriaAddress);
_baseTokenURI = "https://etheria.world/metadata/v0pt9/";
_baseTokenExtension = ".json";
}
receive() external payable
{
// Only accept from Etheria contract
require(_msgSender() == _etheriaAddress, "EW09: ETH sender isn't Etheria contract");
}
event WrapStarted(address indexed addr, uint256 indexed _locationID);
event WrapFinished(address indexed addr, uint256 indexed _locationID);
event Unwrapped(address indexed addr, uint256 indexed _locationID);
event NameSet(address indexed addr, uint256 indexed _locationID, string name);
event StatusSet(address indexed addr, uint256 indexed _locationID, string status);
event OfferRejected(address indexed addr, uint256 indexed _locationID, uint offer, address offerer);
event OfferRetracted(address indexed addr, uint256 indexed _locationID); // offerer is always address(this) and amount always 0.01 ETH
function _getIndex(uint8 col, uint8 row) internal pure returns (uint256) {
require(col <= uint8(32) && row <= uint8(32), "EW09: Invalid col and/or row. Valid range is 0-32"); // uint8 prevents sub-0 automatically
return (uint256(col) * uint256(33)) + uint256(row);
}
// ***** Why are v0.9 and v1.0 wrappable while v1.1 and v1.2 are not? (as of March 2022) *****
//
// Etheria was developed long before any NFT exchanges existed. As such, in versions v0.9 and
// v1.0, I added internal exchange logic (hereinafter the "offer system") to facilitate trading before abandoning
// it in favor of a simple "setOwner" function in v1.1 and v1.2.
//
// While this "offer system" was really poorly designed and clunky (the result of a manic episode of moving fast
// and "testing in production"), it does actually work and work reliably if the proper precautions are taken.
//
// What's more, this "offer system" used msg.sender (v0.9 and v1.0) instead of tx.origin (v1.1 and v1.2) which
// which means v0.9 and v1.0 tiles are ownable by smart contracts... i.e. they are WRAPPABLE
//
// Wrappability means that this terrible "offer system" will be entirely bypassed after wrapping is complete
// because it's the WRAPPER that is traded, not the base token. The base token is owned by the wrapper smart contract
// until unwrap time when the base token is transferred to the new owner.
// ***** How the "offer system" works in v0.9 and v1.0 ***** (don't use this except to wrap/unwrap)
//
// Each v0.9 and v1.0 tile has two arrays: offers[] and offerers[] which can be up to 10 items long.
// When a new offer comes in, the ETH is stored in the contract and the offers[] and offerers[] arrays are expanded
// by 1 item to store the bid.
//
// The tile owner can then rejectOffer(col, row, offerIndex) or acceptOffer(col, row, offerIndex) to transfer
// the tile to the successful bidder.
// ***** How to wrap *****
//
// 0. Start with the tile owned by your normal Ethereum account (not a smart contract) and make sure there are no
// unwanted offers in the offer system. Call etheria.rejectOffer(col, row) until the arrays are completely empty.
// 1. Call the wrapper contract's "makeOfferViaWrapper(col,row)" along with 0.01 ETH to force the wrapper to make
// an offer on the base token. Only the tile owner can do this. The wrapper will save the owner's address.
// 1b. Check the base token's offerer and offerers arrays. They should be 1 item long each, containing 0.01 and the
// address of the *wrapper*. Also check wrapInitializer with getWrapInitializer(col,row)
// 2. Now call acceptOffer(col,row) for your tile on the base contract. Ownership is transferred to the wrapper
// which already has a record of your ownership.
// 3. Call finishWrap() from previous owner to complete the process.
// ***** How to unwrap ***** (Note: you probably shouldn't)
//
// 0. Start with the tile owned by the wrapper. Call rejectOfferViaWrapper(col, row) to clear out offer arrays.
// 1. Call makeOffer(col,row) with 0.01 ETH from the destination account. Check the base token's offerer and offerers arrays.
// They should be 1 item long each, containing 0.01 and the address of the destination account.
// 2. Now call acceptOfferViaWrapper(col,row) for your tile to unwrap the tile to the desired destination.
// -----------------------------------------------------------------------------------------------------------------
// External convenience function to let the user check who, if anyone, is the wrapInitializer for this col,row
//
function getWrapInitializer(uint8 col, uint8 row) external view returns (address) {
uint256 _locationID = _getIndex(col, row);
return wrapInitializers[_locationID];
}
// WRAP STEP(S) 0:
// Reject all standing offers on the base tile you directly own.
// WRAP STEP 1:
// Start the wrapping process by placing an offer on the target tile from the wrapper contract
// Pre-requisites:
// msg.sender must own the base tile (automatically excludes water, guarantees 721 does not exist)
// offer/ers arrays must be empty (all standing offers rejected)
// incoming value must be exactly 0.01 ETH
//
function makeOfferViaWrapper(uint8 col, uint8 row) external payable {
uint256 _locationID = _getIndex(col, row);
require(_etheria.getOwner(col,row) == msg.sender, "EW09: You must be the tile owner to start the wrapping process.");
require(_etheria.getOffers(col,row).length == 0, "EW09: The offer/ers arrays for this tile must be empty. Reject all offers.");
require(msg.value == 10000000000000000, "EW09: You must supply exactly 0.01 ETH to this function.");
_etheria.makeOffer{value: msg.value}(col,row);
// these two are redundant, but w/e
require(_etheria.getOfferers(col,row)[0] == address(this), "EW09: The offerer in position 0 should be this wrapper address.");
require(_etheria.getOffers(col,row)[0] == 10000000000000000, "EW09: The offer in position 0 should be 0.01 ETH.");
wrapInitializers[_locationID] = msg.sender; // doesn't matter if a value already exists in this array
emit WrapStarted(msg.sender, _locationID);
}
// post state:
// Wrapper has placed a 0.01 ETH offer in position 0 of the specified tile that msg.sender owns,
// Wrapper has recorded msg.sender as the wrapInitializer for the specified tile
// WrapStarted event fired
// WRAP STEP 2:
// Call etheria.acceptOffer on the offer this wrapper made on the base tile to give the wrapper ownership (in position 0 only!)
// post state:
// Wrapper now owns the tile, the previous owner (paid 0.01 ETH) is still recorded as the wrapInitializer for it. 721 not yet issued.
// 0.009 and 0.001 ETH have been sent to the base tile owner and Etheria contract creator, respectively, after the "sale"
// base tile offer/ers arrays cleared out and refunded, if necessary
// Note: There is no event for the offer acceptance on the base tile
// Note: You *must* complete the wrapping process in step 3, even if you have changed your mind or want to unwrap.
// The wrapper now technically owns the tile and you can't do anything with it until you finishWrap() first.
// WRAP STEP 3:
// Finishes the wrapping process by minting the 721 token
// Pre-requisites:
// caller must be the wrapInitializer for this tile
// tile must be owned by the wrapper
//
function finishWrap(uint8 col, uint8 row) external {
uint256 _locationID = _getIndex(col, row);
require(wrapInitializers[_locationID] == msg.sender, "EW09: You are not the wrapInitializer for this tile. Call makeOfferViaWrapper first.");
require(_etheria.getOwner(col,row) == address(this), "EW09: Tile is not yet owned by this wrapper. Call etheria.acceptOffer to give the wrapper ownership, then finishWrap to complete.");
_mint(msg.sender, _locationID); // automatically checks to see if token doesn't yet exist
require(_exists(_locationID), "EW09: 721 was not created as it should have been. Reverting.");
delete wrapInitializers[_locationID]; // done minting, remove from wrapInitializers array
require(wrapInitializers[_locationID] == address(0), "EW09: wrapInitializer was not reset to 0. Reverting.");
emit WrapFinished(msg.sender, _locationID);
}
//post state:
// 721 token created and owned by caller
// wrapInitializer for this tile reset to 0
// WrapFinished event fired
// UNWRAP STEP(S) 0 (if necessary):
// rejectOfferViaWrapper enables the 721-ownerOf (you) to clear out standing offers on the base tile via the wrapper
// (since the wrapper technically owns the base tile). W/o this, the tile's 10 offer slots could be DoS-ed with bogus offers
// Note: This always rejects the 0 index offer to enforce the condition that our legit unwrapping offer sit
// in position 0, the only position where we can guarantee no frontrunning/switcharoo issues
// Pre-requisites:
// The 721 exists for the col,row
// There is 1+ offer(s) on the base tile
// You own the 721
// The wrapper owns the base tile
//
function rejectOfferViaWrapper(uint8 col, uint8 row) external {
uint256 _locationID = _getIndex(col, row);
require(_exists(_locationID), "EW09: That 721 does not exist.");
uint8 offersLength = uint8(_etheria.getOffers(col,row).length); // can't be more than 10
require(offersLength > 0, "EW09: The offer/ers arrays for this tile must not be empty.");
address owner = ERC721.ownerOf(_locationID);
require(owner == msg.sender, "EW09: You must be the 721-ownerOf the tile.");
require(_etheria.getOwner(col,row) == address(this), "EW09: The wrapper must be the owner of the base tile.");
address offerer = _etheria.getOfferers(col,row)[0]; // record offerer and offer for event below
uint offer = _etheria.getOffers(col,row)[0];
_etheria.rejectOffer(col,row,0); // always rejecting offer at index 0, we don't care about the others
require(_etheria.getOffers(col,row).length == (offersLength-1), "EW09: Offers array must be 1 less than before. It is not. Reverting.");
emit OfferRejected(msg.sender, _locationID, offer, offerer); // 721 owner rejected an offer on tile x of amount offer by offerer
}
//post state:
// One less offer in the base tile's offers array
// OfferRejected event fired
// UNWRAP STEP 1:
// call etheria.makeOffer with 0.01 ETH from the same account that owns the 721
// then make sure it's the offer sitting in position 0. If it isn't, rejectOfferViaWrapper until it is.
// UNWRAP STEP 2:
// Accepts the offer in position 0, the only position we can guarantee won't be switcharooed
// Pre-requisites:
// 721 must exist
// You must own the 721
// offer on base tile in position 0 must be 0.01 ETH from the 721-owner
//
function acceptOfferViaWrapper(uint8 col, uint8 row) external {
uint256 _locationID = _getIndex(col, row);
require(_exists(_locationID), "EW09: That 721 does not exist.");
address owner = ERC721.ownerOf(_locationID);
require(owner == msg.sender, "EW09: You must be the 721-ownerOf the tile.");
require(_etheria.getOfferers(col,row)[0] == msg.sender, "EW09: You are not the offerer in position 0.");
require(_etheria.getOffers(col,row)[0] == 10000000000000000, "EW09: The offer in position 0 is not 0.01 ETH as expected.");
_etheria.acceptOffer(col, row, 0); // 0.001 will be sent to Etheria creator and 0.009 will be sent to this contract
require(_etheria.getOwner(col,row) == msg.sender, "EW09: You were not made the base tile owner as expected. Reverting.");
_burn(_locationID);
require(!_exists(_locationID), "EW09: The 721 was not burned as expected. Reverting.");
emit Unwrapped(msg.sender, _locationID); // 721 owner unwrapped _locationID
}
// post state:
// 721 burned, base tile now owned by msg.sender
// 0.001 sent to Etheria contract creator, 0.009 sent to this wrapper for the "sale"
// Note: This 0.009 ETH is not withdrawable to you due to complexity and gas. Consider it an unwrap fee. :)
// Base tile offer/ers arrays cleared out and refunded, if necessary
// NOTE: retractOfferViaWrapper is absent due to being unnecessary and overly complex. The tile owner can
// always remove any unwanted offers, including any made from this wrapper.
function setNameViaWrapper(uint8 col, uint8 row, string memory _n) external {
uint256 _locationID = _getIndex(col, row);
require(_exists(_locationID), "EW09: That 721 does not exist.");
address owner = ERC721.ownerOf(_locationID);
require(owner == msg.sender, "EW09: You must be the 721-ownerOf the tile.");
_etheria.setName(col,row,_n);
emit NameSet(msg.sender, _locationID, _n); // tile's 721-ownerOf set _locationID's name
}
function setStatusViaWrapper(uint8 col, uint8 row, string memory _n) external payable {
uint256 _locationID = _getIndex(col, row);
require(_exists(_locationID), "EW09: That 721 does not exist.");
address owner = ERC721.ownerOf(_locationID);
require(owner == msg.sender, "EW09: You must be the 721-ownerOf the tile.");
require(msg.value == 100000000000000000, "EW09: It costs 0.1 ETH to change status."); // 0.1 ETH
_etheria.setStatus{value: msg.value}(col,row,_n);
emit StatusSet(msg.sender, _locationID, _n); // tile's 721-ownerOf set _locationID's status
}
// In the extremely unlikely event somebody is being stupid and filling all the slots on the tiles AND maliciously
// keeping a bot running to continually insert more bogus 0.01 ETH bids into the slots even as the tile owner
// rejects them (i.e. a DoS attack meant to prevent un/wrapping), the tile owner can still get their wrapper bid onto
// the tile via flashbots or similar (avoiding the mempool): Simply etheria.rejectOffer and wrapper.makeOfferViaWrapper
// in back-to-back transactions, then reject offers until the wrapper offer is in slot 0, ready to wrap. (It doesn't
// matter if the bot creates 9 more in the remaining slots.) Hence, there is nothing an attacker can do to DoS a tile.
/**
* @dev sets base token URI and the token extension...
*/
string public _baseTokenURI;
string public _baseTokenExtension;
function setBaseTokenURI(string memory __baseTokenURI) public onlyOwner {
_baseTokenURI = __baseTokenURI;
}
function setTokenExtension(string memory __baseTokenExtension) public onlyOwner {
_baseTokenExtension = __baseTokenExtension;
}
function tokenURI(uint256 _tokenId) public view override returns (string memory) { // complete URI = base + token + token extension
return string(abi.encodePacked(_baseTokenURI, Strings.toString(_tokenId), _baseTokenExtension));
}
function empty() external onlyOwner
{
// Unwrapping leaves 0.009 ETH on this wrapper each time. Allow creator to retrieve, if it ever becomes
// worth the effort. No other money should ever rest on this wrapper, only the base Etheria contract.
payable(msg.sender).transfer(address(this).balance);
}
}