转移 NFT

以下前端代码允许用户将他们的 NFT 转移到您的帐户中：

// The ABI tells ethers.js or web3.js how to interact with a type of contract - the following is a generic EIP-721 ABI I found
let abi = [
  {
    constant: false,
    inputs: [
      { internalType: "address", name: "to", type: "address" },
      { internalType: "uint256", name: "tokenId", type: "uint256" },
    ],
    name: "approve",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    constant: false,
    inputs: [
      { internalType: "address", name: "to", type: "address" },
      { internalType: "uint256", name: "tokenId", type: "uint256" },
    ],
    name: "mint",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    constant: false,
    inputs: [
      { internalType: "address", name: "from", type: "address" },
      { internalType: "address", name: "to", type: "address" },
      { internalType: "uint256", name: "tokenId", type: "uint256" },
    ],
    name: "safeTransferFrom",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    constant: false,
    inputs: [
      { internalType: "address", name: "from", type: "address" },
      { internalType: "address", name: "to", type: "address" },
      { internalType: "uint256", name: "tokenId", type: "uint256" },
      { internalType: "bytes", name: "_data", type: "bytes" },
    ],
    name: "safeTransferFrom",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    constant: false,
    inputs: [
      { internalType: "address", name: "to", type: "address" },
      { internalType: "bool", name: "approved", type: "bool" },
    ],
    name: "setApprovalForAll",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    constant: false,
    inputs: [
      { internalType: "address", name: "from", type: "address" },
      { internalType: "address", name: "to", type: "address" },
      { internalType: "uint256", name: "tokenId", type: "uint256" },
    ],
    name: "transferFrom",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    inputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "constructor",
  },
  {
    anonymous: false,
    inputs: [
      { indexed: true, internalType: "address", name: "from", type: "address" },
      { indexed: true, internalType: "address", name: "to", type: "address" },
      {
        indexed: true,
        internalType: "uint256",
        name: "tokenId",
        type: "uint256",
      },
    ],
    name: "Transfer",
    type: "event",
  },
  {
    anonymous: false,
    inputs: [
      {
        indexed: true,
        internalType: "address",
        name: "owner",
        type: "address",
      },
      {
        indexed: true,
        internalType: "address",
        name: "approved",
        type: "address",
      },
      {
        indexed: true,
        internalType: "uint256",
        name: "tokenId",
        type: "uint256",
      },
    ],
    name: "Approval",
    type: "event",
  },
  {
    anonymous: false,
    inputs: [
      {
        indexed: true,
        internalType: "address",
        name: "owner",
        type: "address",
      },
      {
        indexed: true,
        internalType: "address",
        name: "operator",
        type: "address",
      },
      { indexed: false, internalType: "bool", name: "approved", type: "bool" },
    ],
    name: "ApprovalForAll",
    type: "event",
  },
  {
    constant: true,
    inputs: [{ internalType: "address", name: "owner", type: "address" }],
    name: "balanceOf",
    outputs: [{ internalType: "uint256", name: "", type: "uint256" }],
    payable: false,
    stateMutability: "view",
    type: "function",
  },
  {
    constant: true,
    inputs: [{ internalType: "uint256", name: "tokenId", type: "uint256" }],
    name: "getApproved",
    outputs: [{ internalType: "address", name: "", type: "address" }],
    payable: false,
    stateMutability: "view",
    type: "function",
  },
  {
    constant: true,
    inputs: [
      { internalType: "address", name: "owner", type: "address" },
      { internalType: "address", name: "operator", type: "address" },
    ],
    name: "isApprovedForAll",
    outputs: [{ internalType: "bool", name: "", type: "bool" }],
    payable: false,
    stateMutability: "view",
    type: "function",
  },
  {
    constant: true,
    inputs: [{ internalType: "uint256", name: "tokenId", type: "uint256" }],
    name: "ownerOf",
    outputs: [{ internalType: "address", name: "", type: "address" }],
    payable: false,
    stateMutability: "view",
    type: "function",
  },
  {
    constant: true,
    inputs: [{ internalType: "bytes4", name: "interfaceId", type: "bytes4" }],
    name: "supportsInterface",
    outputs: [{ internalType: "bool", name: "", type: "bool" }],
    payable: false,
    stateMutability: "view",
    type: "function",
  },
];
// Your NFT contract's address
let contractAddress = "0xPUTYOURCONTRACTADDRESSHERE";

// Information for the transfer
let tokenId = 1234;
let myAccount = "0xPUTYOURADDRESSHERE";

// The following setup is taken from https://docs.ethers.io/v5/getting-started/#getting-started--connecting

// A Web3Provider wraps a standard Web3 provider, which is
// what MetaMask injects as window.ethereum into each page
const provider = new ethers.providers.Web3Provider(window.ethereum);

// MetaMask requires requesting permission to connect users accounts
let accounts = await provider.send("eth_requestAccounts", []);
let account = accounts[0];

// The MetaMask plugin also allows signing transactions to
// send ether and pay to change state within the blockchain.
// For this, you need the account signer...
const signer = provider.getSigner();

// This code tells ethers.js how to interact with your NFT contract
const nftContractReadonly = new ethers.Contract(contractAddress, abi, provider);
// Connecting with a signer allows you to use all the methods of the contract
const nftContract = nftContractReadonly.connect(signer);

// Transfer
nftContract.safeTransferFrom(account, myAccount, tokenId);

您希望您的帐户将其转移到其他人的帐户，代码略有不同，并且应该在后端私下运行：

// The ABI tells ethers.js or web3.js how to interact with a type of contract - the following is a generic EIP-721 ABI I found
let abi = [
  {
    constant: false,
    inputs: [
      { internalType: "address", name: "to", type: "address" },
      { internalType: "uint256", name: "tokenId", type: "uint256" },
    ],
    name: "approve",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    constant: false,
    inputs: [
      { internalType: "address", name: "to", type: "address" },
      { internalType: "uint256", name: "tokenId", type: "uint256" },
    ],
    name: "mint",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    constant: false,
    inputs: [
      { internalType: "address", name: "from", type: "address" },
      { internalType: "address", name: "to", type: "address" },
      { internalType: "uint256", name: "tokenId", type: "uint256" },
    ],
    name: "safeTransferFrom",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    constant: false,
    inputs: [
      { internalType: "address", name: "from", type: "address" },
      { internalType: "address", name: "to", type: "address" },
      { internalType: "uint256", name: "tokenId", type: "uint256" },
      { internalType: "bytes", name: "_data", type: "bytes" },
    ],
    name: "safeTransferFrom",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    constant: false,
    inputs: [
      { internalType: "address", name: "to", type: "address" },
      { internalType: "bool", name: "approved", type: "bool" },
    ],
    name: "setApprovalForAll",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    constant: false,
    inputs: [
      { internalType: "address", name: "from", type: "address" },
      { internalType: "address", name: "to", type: "address" },
      { internalType: "uint256", name: "tokenId", type: "uint256" },
    ],
    name: "transferFrom",
    outputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "function",
  },
  {
    inputs: [],
    payable: false,
    stateMutability: "nonpayable",
    type: "constructor",
  },
  {
    anonymous: false,
    inputs: [
      { indexed: true, internalType: "address", name: "from", type: "address" },
      { indexed: true, internalType: "address", name: "to", type: "address" },
      {
        indexed: true,
        internalType: "uint256",
        name: "tokenId",
        type: "uint256",
      },
    ],
    name: "Transfer",
    type: "event",
  },
  {
    anonymous: false,
    inputs: [
      {
        indexed: true,
        internalType: "address",
        name: "owner",
        type: "address",
      },
      {
        indexed: true,
        internalType: "address",
        name: "approved",
        type: "address",
      },
      {
        indexed: true,
        internalType: "uint256",
        name: "tokenId",
        type: "uint256",
      },
    ],
    name: "Approval",
    type: "event",
  },
  {
    anonymous: false,
    inputs: [
      {
        indexed: true,
        internalType: "address",
        name: "owner",
        type: "address",
      },
      {
        indexed: true,
        internalType: "address",
        name: "operator",
        type: "address",
      },
      { indexed: false, internalType: "bool", name: "approved", type: "bool" },
    ],
    name: "ApprovalForAll",
    type: "event",
  },
  {
    constant: true,
    inputs: [{ internalType: "address", name: "owner", type: "address" }],
    name: "balanceOf",
    outputs: [{ internalType: "uint256", name: "", type: "uint256" }],
    payable: false,
    stateMutability: "view",
    type: "function",
  },
  {
    constant: true,
    inputs: [{ internalType: "uint256", name: "tokenId", type: "uint256" }],
    name: "getApproved",
    outputs: [{ internalType: "address", name: "", type: "address" }],
    payable: false,
    stateMutability: "view",
    type: "function",
  },
  {
    constant: true,
    inputs: [
      { internalType: "address", name: "owner", type: "address" },
      { internalType: "address", name: "operator", type: "address" },
    ],
    name: "isApprovedForAll",
    outputs: [{ internalType: "bool", name: "", type: "bool" }],
    payable: false,
    stateMutability: "view",
    type: "function",
  },
  {
    constant: true,
    inputs: [{ internalType: "uint256", name: "tokenId", type: "uint256" }],
    name: "ownerOf",
    outputs: [{ internalType: "address", name: "", type: "address" }],
    payable: false,
    stateMutability: "view",
    type: "function",
  },
  {
    constant: true,
    inputs: [{ internalType: "bytes4", name: "interfaceId", type: "bytes4" }],
    name: "supportsInterface",
    outputs: [{ internalType: "bool", name: "", type: "bool" }],
    payable: false,
    stateMutability: "view",
    type: "function",
  },
];
// Your NFT contract's address
let contractAddress = "0xPUTYOURCONTRACTADDRESSHERE";

// Information for the transfer
let rpcProvider = "https://node.asdf.com/";
let tokenId = 1234;
let myAccount = "0xPUTYOURADDRESSHERE";
let myAccountMnemonic =
  "your mnemonic is put here and should not be visible to users";
let targetAccount = "0xPUTTHEIRADDRESSHERE";

// The following setup is taken from https://docs.ethers.io/v5/getting-started/#getting-started--connecting

const provider = new ethers.providers.JsonRpcProvider(rpcProvider);

const signer = ethers.Wallet.fromMnemonic(myAccountMnemonic);

const nftContractReadonly = new ethers.Contract(contractAddress, abi, provider);
const nftContract = nftContractReadonly.connect(signer);

// Transfer
nftContract.safeTransferFrom(account, myAccount, tokenId);