tBTC Deposit Token

0x10b66bd1e3b5a936b7f8dbc5976004311037cdf0

initialize keyboard_arrow_up

    function initialize(address _factory) public {
        require(_factory != address(0), "Factory cannot be the zero address.");
        require(! _initialized, "Factory can only be initialized once.");

        _depositFactory = _factory;
        _initialized = true;
    }

balanceOf keyboard_arrow_up

    function balanceOf(address owner) public view returns (uint256) {
        require(owner != address(0), "ERC721: balance query for the zero address");

        return _ownedTokensCount[owner].current();
    }

ownerOf keyboard_arrow_up

    function ownerOf(uint256 tokenId) public view returns (address) {
        address owner = _tokenOwner[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");

        return owner;
    }

safeTransferFrom keyboard_arrow_up

    function safeTransferFrom(address from, address to, uint256 tokenId) public {
        safeTransferFrom(from, to, tokenId, "");
    }

transferFrom keyboard_arrow_up

    function transferFrom(address from, address to, uint256 tokenId) public {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(msg.sender, tokenId), "ERC721: transfer caller is not owner nor approved");

        _transferFrom(from, to, tokenId);
    }

approve keyboard_arrow_up

    function approve(address to, uint256 tokenId) public {
        address owner = ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(msg.sender == owner || isApprovedForAll(owner, msg.sender),
            "ERC721: approve caller is not owner nor approved for all"
        );

        _tokenApprovals[tokenId] = to;
        emit Approval(owner, to, tokenId);
    }

getApproved keyboard_arrow_up

    function getApproved(uint256 tokenId) public view returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

setApprovalForAll keyboard_arrow_up

    function setApprovalForAll(address to, bool approved) public {
        require(to != msg.sender, "ERC721: approve to caller");

        _operatorApprovals[msg.sender][to] = approved;
        emit ApprovalForAll(msg.sender, to, approved);
    }

isApprovedForAll keyboard_arrow_up

    function isApprovedForAll(address owner, address operator) public view returns (bool) {
        return _operatorApprovals[owner][operator];
    }

safeTransferFrom keyboard_arrow_up

    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public {
        transferFrom(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

name keyboard_arrow_up

    function name() external view returns (string memory) {
        return _name;
    }

symbol keyboard_arrow_up

    function symbol() external view returns (string memory) {
        return _symbol;
    }

tokenURI keyboard_arrow_up

    function tokenURI(uint256 tokenId) external view returns (string memory) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
        return _tokenURIs[tokenId];
    }

supportsInterface keyboard_arrow_up

    function supportsInterface(bytes4 interfaceId) external view returns (bool) {
        return _supportedInterfaces[interfaceId];
    }

mint keyboard_arrow_up

    function mint(address _to, uint256 _tokenId) external onlyFactory {
        _mint(_to, _tokenId);
    }

exists keyboard_arrow_up

    function exists(uint256 _tokenId) external view returns (bool) {
        return _exists(_tokenId);
    }

approveAndCall keyboard_arrow_up

    function approveAndCall(
        ITokenRecipient _spender,
        uint256 _tdtId,
        bytes memory _extraData
    ) public returns (bool) { // not external to allow bytes memory parameters
        approve(address(_spender), _tdtId);
        _spender.receiveApproval(msg.sender, _tdtId, address(this), _extraData);
        return true;
    }