347 lines
10 KiB
Solidity
347 lines
10 KiB
Solidity
|
// SPDX-License-Identifier: CC0-1.0
|
||
|
|
pragma solidity ^0.8.0;
|
||
|
|
|
||
|
|
import "./interface/IMFNFT.sol";
|
||
|
|
import "./interface/IERC721.sol";
|
||
|
|
import "./math/SafeMath.sol";
|
||
|
|
import "./helper/Verifier.sol";
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @title TWIG_FNFT Contract
|
||
|
|
*/
|
||
|
|
contract MFNFT is IMFNFT, Verifier {
|
||
|
|
using SafeMath for uint256;
|
||
|
|
|
||
|
|
mapping(uint256 => mapping(address => uint256)) private _balances;
|
||
|
|
|
||
|
|
mapping(uint256 => mapping(address => mapping(address => uint256)))
|
||
|
|
private _allowed;
|
||
|
|
|
||
|
|
// uint256 private _totalSupply;
|
||
|
|
mapping(uint256 => uint256) _totalSupply;
|
||
|
|
|
||
|
|
// NFT Contract Address
|
||
|
|
// address private _parentToken;
|
||
|
|
mapping(uint256 => address) _parentToken;
|
||
|
|
|
||
|
|
// NFT ID of NFT(RFT) - TokenId
|
||
|
|
// uint256 private _parentTokenId;
|
||
|
|
mapping(uint256 => uint256) _parentTokenId;
|
||
|
|
|
||
|
|
//
|
||
|
|
mapping(address => mapping(uint256 => uint256)) private _Ids;
|
||
|
|
|
||
|
|
// Scalar value to distinguish fractionalized NFT
|
||
|
|
uint256 public _id;
|
||
|
|
|
||
|
|
// Admin Address to Set the Parent NFT
|
||
|
|
address private _admin;
|
||
|
|
|
||
|
|
// Event emitted when token is added
|
||
|
|
event TokenAddition(
|
||
|
|
address indexed token,
|
||
|
|
uint256 tokenId,
|
||
|
|
uint256 _id,
|
||
|
|
uint256 totalSupply
|
||
|
|
);
|
||
|
|
|
||
|
|
constructor() {
|
||
|
|
_admin = msg.sender;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev onlyAdmin prohibits function calls arbitrary msg.sender
|
||
|
|
* except _admin
|
||
|
|
*/
|
||
|
|
modifier onlyAdmin() {
|
||
|
|
require(msg.sender == _admin);
|
||
|
|
_;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Mandatory function to receive NFT as a contract(CA)
|
||
|
|
* @return Bytes4 which is the selector of this function
|
||
|
|
*/
|
||
|
|
function onERC721Received(
|
||
|
|
address _operator,
|
||
|
|
address _from,
|
||
|
|
uint256 _tokenId,
|
||
|
|
bytes calldata _data
|
||
|
|
) external pure returns (bytes4) {
|
||
|
|
return this.onERC721Received.selector;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev (ERC165) Determines if this contract supports Re-FT(ERC1633).
|
||
|
|
* @param interfaceID The bytes4 to query if it matches with the contract interface id.
|
||
|
|
*/
|
||
|
|
function supportsInterface(bytes4 interfaceID)
|
||
|
|
external
|
||
|
|
pure
|
||
|
|
returns (bool)
|
||
|
|
{
|
||
|
|
return
|
||
|
|
interfaceID == this.supportsInterface.selector || // ERC165
|
||
|
|
interfaceID == this.parentToken.selector || // parentToken()
|
||
|
|
interfaceID == this.parentTokenId.selector || // parentTokenId()
|
||
|
|
interfaceID ==
|
||
|
|
this.parentToken.selector ^ this.parentTokenId.selector; // RFT
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Sets the Address of NFT Contract Address & NFT Token ID
|
||
|
|
* @param parentNFTContractAddress The address NFT Contract address.
|
||
|
|
* @param parentNFTTokenId The token id of NFT.
|
||
|
|
*/
|
||
|
|
function setParentNFT(
|
||
|
|
address parentNFTContractAddress,
|
||
|
|
uint256 parentNFTTokenId,
|
||
|
|
uint256 totalSupply
|
||
|
|
) public onlyAdmin {
|
||
|
|
require(
|
||
|
|
parentNFTContractAddress != address(0),
|
||
|
|
"MFNFT::setParentNFT: Parent NFT Contract should not be zero"
|
||
|
|
);
|
||
|
|
require(
|
||
|
|
getTokenId(parentNFTContractAddress, parentNFTTokenId) == 0,
|
||
|
|
"MFNFT::setParentNFT: Already owned(fractionalized) by this contract"
|
||
|
|
);
|
||
|
|
|
||
|
|
verifyOwnership(parentNFTContractAddress, parentNFTTokenId);
|
||
|
|
|
||
|
|
_id++;
|
||
|
|
|
||
|
|
_Ids[parentNFTContractAddress][parentNFTTokenId] = _id;
|
||
|
|
|
||
|
|
_parentToken[_id] = parentNFTContractAddress;
|
||
|
|
_parentTokenId[_id] = parentNFTTokenId;
|
||
|
|
|
||
|
|
_totalSupply[_id] = totalSupply;
|
||
|
|
_balances[_id][msg.sender] = totalSupply;
|
||
|
|
|
||
|
|
emit TokenAddition(
|
||
|
|
parentNFTContractAddress,
|
||
|
|
parentNFTTokenId,
|
||
|
|
_id,
|
||
|
|
totalSupply
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Returns the tokenId of with the given NFT information
|
||
|
|
* @return An uint256 value representing the tokenId of given NFT
|
||
|
|
*/
|
||
|
|
function getTokenId(address token, uint256 tokenId)
|
||
|
|
public
|
||
|
|
view
|
||
|
|
returns (uint256)
|
||
|
|
{
|
||
|
|
return _Ids[token][tokenId];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Returns if the NFT is owned(fractionalized) by this contract.
|
||
|
|
* @return An bool representing whether the NFT is fractionalized by this contract
|
||
|
|
*/
|
||
|
|
function isRegistered(address token, uint256 tokenId) public view returns (bool) {
|
||
|
|
return (_Ids[token][tokenId] != 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Returns the Address of Parent Token Address
|
||
|
|
* @return An Address representing the address of NFT Contract this Re-FT is pointing to.
|
||
|
|
*/
|
||
|
|
function parentToken(uint256 tokenId) external view returns (address) {
|
||
|
|
return _parentToken[tokenId];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Returns the Token ID of NFT
|
||
|
|
* @return An uint256 representing the token id of the NFT this Re-FT is pointing to.
|
||
|
|
*/
|
||
|
|
function parentTokenId(uint256 tokenId) external view returns (uint256) {
|
||
|
|
return _parentTokenId[tokenId];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Total number of tokens in existence
|
||
|
|
*/
|
||
|
|
function totalSupply(uint256 tokenId)
|
||
|
|
public
|
||
|
|
view
|
||
|
|
override
|
||
|
|
returns (uint256)
|
||
|
|
{
|
||
|
|
return _totalSupply[tokenId];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Gets the balance of the specified address.
|
||
|
|
* @param owner The address to query the balance of.
|
||
|
|
* @return An uint256 representing the amount owned by the passed address.
|
||
|
|
*/
|
||
|
|
function balanceOf(address owner, uint256 tokenId)
|
||
|
|
public
|
||
|
|
view
|
||
|
|
override
|
||
|
|
returns (uint256)
|
||
|
|
{
|
||
|
|
return _balances[tokenId][owner];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Function to check the amount of tokens that an owner allowed to a spender.
|
||
|
|
* @param owner address The address which owns the funds.
|
||
|
|
* @param spender address The address which will spend the funds.
|
||
|
|
* @return A uint256 specifying the amount of tokens still available for the spender.
|
||
|
|
*/
|
||
|
|
function allowance(
|
||
|
|
address owner,
|
||
|
|
address spender,
|
||
|
|
uint256 tokenId
|
||
|
|
) public view override returns (uint256) {
|
||
|
|
return _allowed[tokenId][owner][spender];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Transfer token for a specified address
|
||
|
|
* @param to The address to transfer to.
|
||
|
|
* @param value The amount to be transferred.
|
||
|
|
*/
|
||
|
|
function transfer(
|
||
|
|
address to,
|
||
|
|
uint256 tokenId,
|
||
|
|
uint256 value
|
||
|
|
) public override returns (bool) {
|
||
|
|
_transfer(msg.sender, to, tokenId, value);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
|
||
|
|
* Beware that changing an allowance with this method brings the risk that someone may use both the old
|
||
|
|
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
|
||
|
|
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
|
||
|
|
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
|
||
|
|
* @param spender The address which will spend the funds.
|
||
|
|
* @param value The amount of tokens to be spent.
|
||
|
|
*/
|
||
|
|
function approve(
|
||
|
|
address spender,
|
||
|
|
uint256 tokenId,
|
||
|
|
uint256 value
|
||
|
|
) public override returns (bool) {
|
||
|
|
require(spender != address(0));
|
||
|
|
|
||
|
|
_allowed[tokenId][msg.sender][spender] = value;
|
||
|
|
emit Approval(msg.sender, spender, tokenId, value);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Transfer tokens from one address to another.
|
||
|
|
* Note that while this function emits an Approval event, this is not required as per the specification,
|
||
|
|
* and other compliant implementations may not emit the event.
|
||
|
|
* @param from address The address which you want to send tokens from
|
||
|
|
* @param to address The address which you want to transfer to
|
||
|
|
* @param value uint256 the amount of tokens to be transferred
|
||
|
|
*/
|
||
|
|
function transferFrom(
|
||
|
|
address from,
|
||
|
|
address to,
|
||
|
|
uint256 tokenId,
|
||
|
|
uint256 value
|
||
|
|
) public override returns (bool) {
|
||
|
|
_allowed[tokenId][from][msg.sender] = _allowed[tokenId][from][
|
||
|
|
msg.sender
|
||
|
|
].sub(value);
|
||
|
|
_transfer(from, to, tokenId, value);
|
||
|
|
emit Approval(
|
||
|
|
from,
|
||
|
|
msg.sender,
|
||
|
|
tokenId,
|
||
|
|
_allowed[tokenId][from][msg.sender]
|
||
|
|
);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Increase the amount of tokens that an owner allowed to a spender.
|
||
|
|
* approve should be called when allowed_[_spender] == 0. To increment
|
||
|
|
* allowed value is better to use this function to avoid 2 calls (and wait until
|
||
|
|
* the first transaction is mined)
|
||
|
|
* From MonolithDAO Token.sol
|
||
|
|
* Emits an Approval event.
|
||
|
|
* @param spender The address which will spend the funds.
|
||
|
|
* @param addedValue The amount of tokens to increase the allowance by.
|
||
|
|
*/
|
||
|
|
function increaseAllowance(
|
||
|
|
address spender,
|
||
|
|
uint256 tokenId,
|
||
|
|
uint256 addedValue
|
||
|
|
) public returns (bool) {
|
||
|
|
require(spender != address(0));
|
||
|
|
|
||
|
|
_allowed[tokenId][msg.sender][spender] = _allowed[tokenId][msg.sender][
|
||
|
|
spender
|
||
|
|
].add(addedValue);
|
||
|
|
|
||
|
|
emit Approval(
|
||
|
|
msg.sender,
|
||
|
|
spender,
|
||
|
|
tokenId,
|
||
|
|
_allowed[tokenId][msg.sender][spender]
|
||
|
|
);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Decrease the amount of tokens that an owner allowed to a spender.
|
||
|
|
* approve should be called when allowed_[_spender] == 0. To decrement
|
||
|
|
* allowed value is better to use this function to avoid 2 calls (and wait until
|
||
|
|
* the first transaction is mined)
|
||
|
|
* From MonolithDAO Token.sol
|
||
|
|
* Emits an Approval event.
|
||
|
|
* @param spender The address which will spend the funds.
|
||
|
|
* @param subtractedValue The amount of tokens to decrease the allowance by.
|
||
|
|
*/
|
||
|
|
function decreaseAllowance(
|
||
|
|
address spender,
|
||
|
|
uint256 tokenId,
|
||
|
|
uint256 subtractedValue
|
||
|
|
) public returns (bool) {
|
||
|
|
require(spender != address(0));
|
||
|
|
|
||
|
|
_allowed[tokenId][msg.sender][spender] = _allowed[tokenId][msg.sender][
|
||
|
|
spender
|
||
|
|
].sub(subtractedValue);
|
||
|
|
emit Approval(
|
||
|
|
msg.sender,
|
||
|
|
spender,
|
||
|
|
tokenId,
|
||
|
|
_allowed[tokenId][msg.sender][spender]
|
||
|
|
);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Transfer token for a specified addresses
|
||
|
|
* @param from The address to transfer from.
|
||
|
|
* @param to The address to transfer to.
|
||
|
|
* @param value The amount to be transferred.
|
||
|
|
*/
|
||
|
|
function _transfer(
|
||
|
|
address from,
|
||
|
|
address to,
|
||
|
|
uint256 tokenId,
|
||
|
|
uint256 value
|
||
|
|
) internal {
|
||
|
|
require(to != address(0));
|
||
|
|
|
||
|
|
_balances[tokenId][from] = _balances[tokenId][from].sub(value);
|
||
|
|
_balances[tokenId][to] = _balances[tokenId][to].add(value);
|
||
|
|
|
||
|
|
emit Transfer(from, to, tokenId, value);
|
||
|
|
}
|
||
|
|
}
|