ETH Price: $3,159.40 (+2.89%)
Gas: 1 Gwei

Contract

0x14e2f9B0381Af4227D26BEE7d8E4D424466A7F3F
 

Overview

ETH Balance

0 ETH

Eth Value

$0.00

Token Holdings

Multichain Info

No addresses found
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Method
Block
From
To
Get Bridgeable N...200959182024-06-15 8:11:4728 days ago1718439107IN
Gains Network: GFarm Nft Swap
0 ETH0.004051626.48564447
Get Bridgeable N...200959172024-06-15 8:11:3528 days ago1718439095IN
Gains Network: GFarm Nft Swap
0 ETH0.002897076.24739354
Get Bridgeable N...200959152024-06-15 8:11:1128 days ago1718439071IN
Gains Network: GFarm Nft Swap
0 ETH0.005209256.3894573
Get Bridgeable N...200954952024-06-15 6:45:4728 days ago1718433947IN
Gains Network: GFarm Nft Swap
0 ETH0.004137346.62073031
Get Bridgeable N...200954942024-06-15 6:45:3528 days ago1718433935IN
Gains Network: GFarm Nft Swap
0 ETH0.003035276.68673532
Get Bridgeable N...200954932024-06-15 6:45:2328 days ago1718433923IN
Gains Network: GFarm Nft Swap
0 ETH0.005554546.73369164
Get Bridgeable N...200954642024-06-15 6:39:3528 days ago1718433575IN
Gains Network: GFarm Nft Swap
0 ETH0.003818946.1112177
Get Bridgeable N...200954632024-06-15 6:39:2328 days ago1718433563IN
Gains Network: GFarm Nft Swap
0 ETH0.005004456.06681761
Get Bridgeable N...200951642024-06-15 5:38:4728 days ago1718429927IN
Gains Network: GFarm Nft Swap
0 ETH0.001528876.03835694
Get Bridgeable N...200951632024-06-15 5:38:2328 days ago1718429903IN
Gains Network: GFarm Nft Swap
0 ETH0.003953936.18290994
Get Bridgeable N...200951622024-06-15 5:38:1128 days ago1718429891IN
Gains Network: GFarm Nft Swap
0 ETH0.002800416.16932905
Get Bridgeable N...200951612024-06-15 5:37:5928 days ago1718429879IN
Gains Network: GFarm Nft Swap
0 ETH0.004915835.95938788
Get Bridgeable N...200951602024-06-15 5:37:4728 days ago1718429867IN
Gains Network: GFarm Nft Swap
0 ETH0.001619196.04619946
Get Bridgeable N...200950612024-06-15 5:17:3528 days ago1718428655IN
Gains Network: GFarm Nft Swap
0 ETH0.001899447.50192281
Get Bridgeable N...200950602024-06-15 5:17:2328 days ago1718428643IN
Gains Network: GFarm Nft Swap
0 ETH0.004695257.45639172
Get Bridgeable N...200950592024-06-15 5:17:1128 days ago1718428631IN
Gains Network: GFarm Nft Swap
0 ETH0.003207557.22219291
Get Bridgeable N...200950582024-06-15 5:16:5928 days ago1718428619IN
Gains Network: GFarm Nft Swap
0 ETH0.006371847.63379856
Get Bridgeable N...200949742024-06-15 5:00:1128 days ago1718427611IN
Gains Network: GFarm Nft Swap
0 ETH0.00574757.09315921
Get Bridgeable N...200949652024-06-15 4:58:2328 days ago1718427503IN
Gains Network: GFarm Nft Swap
0 ETH0.006317977.48240824
Get Bridgeable N...200949612024-06-15 4:57:3528 days ago1718427455IN
Gains Network: GFarm Nft Swap
0 ETH0.003440887.42009312
Get Bridgeable N...200948622024-06-15 4:37:2328 days ago1718426243IN
Gains Network: GFarm Nft Swap
0 ETH0.004776727.64404135
Get Bridgeable N...200948602024-06-15 4:36:5928 days ago1718426219IN
Gains Network: GFarm Nft Swap
0 ETH0.006116147.32755798
Get Bridgeable N...200948132024-06-15 4:27:1128 days ago1718425631IN
Gains Network: GFarm Nft Swap
0 ETH0.005997887.40135555
Get Bridgeable N...200948102024-06-15 4:26:3528 days ago1718425595IN
Gains Network: GFarm Nft Swap
0 ETH0.003194476.88873245
Get Bridgeable N...200948082024-06-15 4:26:1128 days ago1718425571IN
Gains Network: GFarm Nft Swap
0 ETH0.003320317.16010419
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Contract Source Code Verified (Exact Match)

Contract Name:
GFarmNftSwap

Compiler Version
v0.7.5+commit.eb77ed08

Optimization Enabled:
Yes with 1500 runs

Other Settings:
default evmVersion, None license
/**
 *Submitted for verification at Etherscan.io on 2021-04-05
*/

// File: node_modules\@openzeppelin\contracts\introspection\IERC165.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// File: @openzeppelin\contracts\token\ERC721\IERC721.sol

pragma solidity ^0.7.0;


/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
      * @dev Safely transfers `tokenId` token from `from` to `to`.
      *
      * Requirements:
      *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
      * - `tokenId` token must exist and be owned by `from`.
      * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
      * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
      *
      * Emits a {Transfer} event.
      */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}

// File: contracts\GFarmNftSwap.sol

pragma solidity 0.7.5;

interface GFarmNftInterface{
    function idToLeverage(uint id) external view returns(uint8);
    function transferFrom(address from, address to, uint256 tokenId) external;
}

interface GFarmBridgeableNftInterface{
    function ownerOf(uint256 tokenId) external view returns (address);
	function mint(address to, uint tokenId) external;
	function burn(uint tokenId) external;
    function transferFrom(address from, address to, uint256 tokenId) external;

}

contract GFarmNftSwap{

	GFarmNftInterface public nft;
	GFarmBridgeableNftInterface[5] public bridgeableNfts;
	address public gov;

	event NftToBridgeableNft(uint nftType, uint tokenId);
	event BridgeableNftToNft(uint nftType, uint tokenId);

	constructor(GFarmNftInterface _nft){
		nft = _nft;
		gov = msg.sender;
	}

	function setBridgeableNfts(GFarmBridgeableNftInterface[5] calldata _bridgeableNfts) external{
		require(msg.sender == gov, "ONLY_GOV");
		require(bridgeableNfts[0] == GFarmBridgeableNftInterface(0), "BRIDGEABLE_NFTS_ALREADY_SET");
		bridgeableNfts = _bridgeableNfts;
	}

	function leverageToType(uint leverage) pure private returns(uint){
		// 150 => 5
		if(leverage == 150){ return 5; }
		
		// 25 => 1, 50 => 2, 75 => 3, 100 => 4
		return leverage / 25;
	}

	// Important: nft types = 1,2,3,4,5 (25x, 50x, 75x, 100x, 150x)
	modifier correctNftType(uint nftType){
		require(nftType > 0 && nftType < 6, "NFT_TYPE_BETWEEN_1_AND_5");
		_;
	}

	// Swap non-bridgeable nft for bridgeable nft
	function getBridgeableNft(uint nftType, uint tokenId) public correctNftType(nftType){
		// 1. token id corresponds to type provided
		require(leverageToType(nft.idToLeverage(tokenId)) == nftType, "WRONG_TYPE");

		// 2. transfer nft to this contract
		nft.transferFrom(msg.sender, address(this), tokenId);

		// 3. mint bridgeable nft of same type
		bridgeableNfts[nftType-1].mint(msg.sender, tokenId);

		emit NftToBridgeableNft(nftType, tokenId);
	}

	// Swap non-bridgeable nfts for bridgeable nfts
	function getBridgeableNfts(uint nftType, uint[] calldata ids) external correctNftType(nftType){
		// 1. max 10 at the same time
		require(ids.length <= 10, "MAX_10");

		// 2. loop over ids
		for(uint i = 0; i < ids.length; i++){
			getBridgeableNft(nftType, ids[i]);
		}
	}

	// Swap bridgeable nft for unbridgeable nft
	function getNft(uint nftType, uint tokenId) public correctNftType(nftType){
		// 1. Verify he owns the NFT
		require(bridgeableNfts[nftType-1].ownerOf(tokenId) == msg.sender, "NOT_OWNER");

		// 2. Burn bridgeable nft
		bridgeableNfts[nftType-1].burn(tokenId);

		// 3. transfer nft to msg.sender
		nft.transferFrom(address(this), msg.sender, tokenId);

		emit BridgeableNftToNft(nftType, tokenId);
	}

	// Swap bridgeable nft for unbridgeable nfts
	function getNfts(uint nftType, uint[] calldata ids) external correctNftType(nftType){
		// 1. max 10 at the same time
		require(ids.length <= 10, "MAX_10");

		// 2. loop over ids
		for(uint i = 0; i < ids.length; i++){
			getNft(nftType, ids[i]);
		}
	}

}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"contract GFarmNftInterface","name":"_nft","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"nftType","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"BridgeableNftToNft","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"nftType","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"NftToBridgeableNft","type":"event"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"bridgeableNfts","outputs":[{"internalType":"contract GFarmBridgeableNftInterface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"nftType","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getBridgeableNft","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"nftType","type":"uint256"},{"internalType":"uint256[]","name":"ids","type":"uint256[]"}],"name":"getBridgeableNfts","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"nftType","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getNft","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"nftType","type":"uint256"},{"internalType":"uint256[]","name":"ids","type":"uint256[]"}],"name":"getNfts","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"gov","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nft","outputs":[{"internalType":"contract GFarmNftInterface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract GFarmBridgeableNftInterface[5]","name":"_bridgeableNfts","type":"address[5]"}],"name":"setBridgeableNfts","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Deployed Bytecode

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

00000000000000000000000043ccd9ea8f64b8918267f7ee4a071d3e9168f9cd

-----Decoded View---------------
Arg [0] : _nft (address): 0x43ccD9eA8f64B8918267F7EE4a071D3e9168F9cD

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000043ccd9ea8f64b8918267f7ee4a071d3e9168f9cd


Deployed Bytecode Sourcemap

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Swarm Source

ipfs://d7b14ee9177a1a8cb3bbc60e9d04f36d7230ca4f98128aae160fb802511dfa91

Block Transaction Difficulty Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.