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contract.sol
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contract.sol
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pragma solidity ^0.8.0;
import "https://github.com/ethereum-bridge/ethereum-bridge-contracts/Bridge.sol";
contract MultiChainNFTWallet {
// Mapping to store NFTs
mapping(bytes32 => bool) public nfts;
// Event for NFT transfer
event Transfer(address indexed _from, bytes32 _tokenId, bytes memory _data, address _toChain);
// Bridge contract instance
Bridge public bridge;
// Security measure to prevent unauthorized contract calls
address public owner;
constructor(address _bridge) public {
require(_bridge != address(0));
owner = msg.sender;
bridge = Bridge(_bridge);
}
// Function to add an NFT to the wallet
function addNFT(bytes32 _tokenId) public {
require(msg.sender == owner);
require(nfts[_tokenId] == false);
nfts[_tokenId] = true;
}
// Function to remove an NFT from the wallet
function removeNFT(bytes32 _tokenId) public {
require(msg.sender == owner);
require(nfts[_tokenId] == true);
nfts[_tokenId] = false;
}
// Function to transfer an NFT to another blockchain
function transferNFT(bytes32 _tokenId, bytes memory _data, address _toChain) public {
require(msg.sender == owner);
require(nfts[_tokenId] == true);
require(_toChain != address(0));
// Send the NFT to the other blockchain
(bool success, bytes memory returnData) = bridge.transfer(_tokenId, _data, address(this), _toChain);
// Check for errors
require(success, "Error: Transfer failed");
emit Transfer(msg.sender, _tokenId, _data, _toChain);
}
// Function to change the owner address
function changeOwner(address newOwner) public {
require(msg.sender == owner);
require(newOwner != address(0));
owner = newOwner;
}
}