sol |
| ZombieCard.sol |
ERC721XToken.sol |
pragma solidity ^0.4.25;
import "./ERC721XToken.sol";
contract ZombieCard is ERC721XToken {
// 1. Create mapping here
function name() external view returns (string) {
return "ZombieCard";
}
function symbol() external view returns (string) {
return "ZCX";
}
// 2. Define function here
}
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// Full implementation with all included files at https://github.com/loomnetwork/erc721x
pragma solidity ^0.4.25;
import "./../../Interfaces/ERC721X.sol";
import "./../../Interfaces/ERC721XReceiver.sol";
import "./ERC721XTokenNFT.sol";
import "openzeppelin-solidity/contracts/AddressUtils.sol";
import "./../../Libraries/ObjectsLib.sol";
// Additional features over NFT token that is compatible with batch transfers
contract ERC721XToken is ERC721X, ERC721XTokenNFT {
using ObjectLib for ObjectLib.Operations;
using AddressUtils for address;
bytes4 internal constant ERC721X_RECEIVED = 0x660b3370;
bytes4 internal constant ERC721X_BATCH_RECEIVE_SIG = 0xe9e5be6a;
event BatchTransfer(address from, address to, uint256[] tokenTypes, uint256[] amounts);
modifier isOperatorOrOwner(address _from) {
require((msg.sender == _from) || operators[_from][msg.sender], "msg.sender is neither _from nor operator");
_;
}
function implementsERC721X() public pure returns (bool) {
return true;
}
/**
* @dev transfer objects from different tokenIds to specified address
* @param _from The address to BatchTransfer objects from.
* @param _to The address to batchTransfer objects to.
* @param _tokenIds Array of tokenIds to update balance of
* @param _amounts Array of amount of object per type to be transferred.
* Note: Arrays should be sorted so that all tokenIds in a same bin are adjacent (more efficient).
*/
function _batchTransferFrom(address _from, address _to, uint256[] _tokenIds, uint256[] _amounts)
internal
isOperatorOrOwner(_from)
{
// Requirements
require(_tokenIds.length == _amounts.length, "Inconsistent array length between args");
require(_to != address(0), "Invalid recipient");
if (tokenType[_tokenIds[0]] == NFT) {
tokenOwner[_tokenIds[0]] = _to;
emit Transfer(_from, _to, _tokenIds[0]);
}
// Load first bin and index where the object balance exists
(uint256 bin, uint256 index) = ObjectLib.getTokenBinIndex(_tokenIds[0]);
// Balance for current bin in memory (initialized with first transfer)
// Written with bad library syntax instead of as below to bypass stack limit error
uint256 balFrom = ObjectLib.updateTokenBalance(
packedTokenBalance[_from][bin], index, _amounts[0], ObjectLib.Operations.SUB
);
uint256 balTo = ObjectLib.updateTokenBalance(
packedTokenBalance[_to][bin], index, _amounts[0], ObjectLib.Operations.ADD
);
// Number of transfers to execute
uint256 nTransfer = _tokenIds.length;
// Last bin updated
uint256 lastBin = bin;
for (uint256 i = 1; i < nTransfer; i++) {
// If we're transferring an NFT we additionally should update the tokenOwner and emit the corresponding event
if (tokenType[_tokenIds[i]] == NFT) {
tokenOwner[_tokenIds[i]] = _to;
emit Transfer(_from, _to, _tokenIds[i]);
}
(bin, index) = _tokenIds[i].getTokenBinIndex();
// If new bin
if (bin != lastBin) {
// Update storage balance of previous bin
packedTokenBalance[_from][lastBin] = balFrom;
packedTokenBalance[_to][lastBin] = balTo;
// Load current bin balance in memory
balFrom = packedTokenBalance[_from][bin];
balTo = packedTokenBalance[_to][bin];
// Bin will be the most recent bin
lastBin = bin;
}
// Update memory balance
balFrom = balFrom.updateTokenBalance(index, _amounts[i], ObjectLib.Operations.SUB);
balTo = balTo.updateTokenBalance(index, _amounts[i], ObjectLib.Operations.ADD);
}
// Update storage of the last bin visited
packedTokenBalance[_from][bin] = balFrom;
packedTokenBalance[_to][bin] = balTo;
// Emit batchTransfer event
emit BatchTransfer(_from, _to, _tokenIds, _amounts);
}
function batchTransferFrom(address _from, address _to, uint256[] _tokenIds, uint256[] _amounts) public {
// Batch Transfering
_batchTransferFrom(_from, _to, _tokenIds, _amounts);
}
/**
* @dev transfer objects from different tokenIds to specified address
* @param _from The address to BatchTransfer objects from.
* @param _to The address to batchTransfer objects to.
* @param _tokenIds Array of tokenIds to update balance of
* @param _amounts Array of amount of object per type to be transferred.
* @param _data Data to pass to onERC721XReceived() function if recipient is contract
* Note: Arrays should be sorted so that all tokenIds in a same bin are adjacent (more efficient).
*/
function safeBatchTransferFrom(
address _from,
address _to,
uint256[] _tokenIds,
uint256[] _amounts,
bytes _data
)
public
{
// Batch Transfering
_batchTransferFrom(_from, _to, _tokenIds, _amounts);
// Pass data if recipient is contract
if (_to.isContract()) {
bytes4 retval = ERC721XReceiver(_to).onERC721XBatchReceived(
msg.sender, _from, _tokenIds, _amounts, _data
);
require(retval == ERC721X_BATCH_RECEIVE_SIG);
}
}
function transfer(address _to, uint256 _tokenId, uint256 _amount) public {
_transferFrom(msg.sender, _to, _tokenId, _amount);
}
function transferFrom(address _from, address _to, uint256 _tokenId, uint256 _amount) public {
_transferFrom(_from, _to, _tokenId, _amount);
}
function _transferFrom(address _from, address _to, uint256 _tokenId, uint256 _amount)
internal
isOperatorOrOwner(_from)
{
require(tokenType[_tokenId] == FT);
require(_amount <= balanceOf(_from, _tokenId), "Quantity greater than from balance");
require(_to != address(0), "Invalid to address");
_updateTokenBalance(_from, _tokenId, _amount, ObjectLib.Operations.SUB);
_updateTokenBalance(_to, _tokenId, _amount, ObjectLib.Operations.ADD);
emit TransferWithQuantity(_from, _to, _tokenId, _amount);
}
function safeTransferFrom(address _from, address _to, uint256 _tokenId, uint256 _amount) public {
safeTransferFrom(_from, _to, _tokenId, _amount, "");
}
function safeTransferFrom(address _from, address _to, uint256 _tokenId, uint256 _amount, bytes _data) public {
_transferFrom(_from, _to, _tokenId, _amount);
require(
checkAndCallSafeTransfer(_from, _to, _tokenId, _amount, _data),
"Sent to a contract which is not an ERC721X receiver"
);
}
function _mint(uint256 _tokenId, address _to, uint256 _supply) internal {
// If the token doesn't exist, add it to the tokens array
if (!exists(_tokenId)) {
tokenType[_tokenId] = FT;
allTokens.push(_tokenId);
} else {
// if the token exists, it must be a FT
require(tokenType[_tokenId] == FT, "Not a FT");
}
_updateTokenBalance(_to, _tokenId, _supply, ObjectLib.Operations.ADD);
emit TransferWithQuantity(address(this), _to, _tokenId, _supply);
}
function checkAndCallSafeTransfer(
address _from,
address _to,
uint256 _tokenId,
uint256 _amount,
bytes _data
)
internal
returns (bool)
{
if (!_to.isContract()) {
return true;
}
bytes4 retval = ERC721XReceiver(_to).onERC721XReceived(
msg.sender, _from, _tokenId, _amount, _data);
return(retval == ERC721X_RECEIVED);
}
}
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pragma solidity ^0.4.25;
import "./ERC721XToken.sol";
contract ZombieCard is ERC721XToken {
mapping(uint => uint) internal tokenIdToIndividualSupply;
function name() external view returns (string) {
return "ZombieCard";
}
function symbol() external view returns (string) {
return "ZCX";
}
function individualSupply(uint _tokenId) public view returns (uint) {
return tokenIdToIndividualSupply(_tokenId);
}
}
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