主网及代币管理

跟踪用户的网络链 ID 非常重要，因为所有 RPC 请求都会提交到当前连接的网络。使用 eth_chainId RPC 方法检测用户当前网络的链 ID。

以 ETH 链为例，侦听 chainChanged 提供程序事件以检测用户何时更改网络：

const chainId = await provider.request({ method: "eth_chainId" });

provider.on("chainChanged", handleChainChanged);

function handleChainChanged(chainId) {
  // We recommend reloading the page, unless you must do otherwise.
  window.location.reload();
}

const chainId = await provider.request({ method: "eth_chainId" });

provider.on("chainChanged", handleChainChanged);

function handleChainChanged(chainId) {
  // We recommend reloading the page, unless you must do otherwise.
  window.location.reload();
}

主网支持判断的通常做法

调用钱包方法切换至目标链
切换失败标识不存在

以 ETH 为例代码如下：

try {
  await provider.request({
    method: "wallet_switchEthereumChain",
    params: [{ chainId: "0xf00" }],
  });
} catch (switchError) {
  // This error code indicates that the chain has not been added to MetaMask.
  if (switchError.code === 4902) {
    try {
      await provider.request({
        method: "wallet_addEthereumChain",
        params: [
          {
            chainId: "0xf00",
            chainName: "...",
            rpcUrls: ["https://..."] /* ... */,
          },
        ],
      });
    } catch (addError) {
      // Handle "add" error.
    }
  }
  // Handle other "switch" errors.
}

try {
  await provider.request({
    method: "wallet_switchEthereumChain",
    params: [{ chainId: "0xf00" }],
  });
} catch (switchError) {
  // This error code indicates that the chain has not been added to MetaMask.
  if (switchError.code === 4902) {
    try {
      await provider.request({
        method: "wallet_addEthereumChain",
        params: [
          {
            chainId: "0xf00",
            chainName: "...",
            rpcUrls: ["https://..."] /* ... */,
          },
        ],
      });
    } catch (addError) {
      // Handle "add" error.
    }
  }
  // Handle other "switch" errors.
}

主网添加

使用钱包添加主网功能：如何添加/切换主链？
代码模式添加

// 要添加的主网信息
let chainInfo = {
  chainId: "0xaa36a7", // A 0x-prefixed hexadecimal string
  chainName: "sepolia",
  nativeCurrency: "ETH",
  iconUrls: "xxx",
  rpcUrls: ["https://sepolia.drpc.org"],
  blockExplorerUrls: ["https://sepolia.drpc.org"],
  nativeCurrency: {
    name: "ETH",
    symbol: "ETH",
    decimals: 18,
  },
};

await provider.request({
  method: "wallet_addEthereumChain",
  params: [chainInfo],
});

// 要添加的主网信息
let chainInfo = {
  chainId: "0xaa36a7", // A 0x-prefixed hexadecimal string
  chainName: "sepolia",
  nativeCurrency: "ETH",
  iconUrls: "xxx",
  rpcUrls: ["https://sepolia.drpc.org"],
  blockExplorerUrls: ["https://sepolia.drpc.org"],
  nativeCurrency: {
    name: "ETH",
    symbol: "ETH",
    decimals: 18,
  },
};

await provider.request({
  method: "wallet_addEthereumChain",
  params: [chainInfo],
});

什么是代币

代币是智能合约平台（如以太坊）的特殊费用载体，用户可以在平台上创建、发行并管理代币（主区块链的衍生品）。

代币添加

使用钱包添加代币功能：如何添加代币/NFT？
代币余额查询及交易参考智能合约

const customTokenInfo = {
  type: "ERC20",
  options: {
    address: "0xd00981105....fe7e037d935b513",
    symbol: "BWB",
    decimals: 18,
    image: "http://...",
  },
};

const added = await provider.request({
  method: "wallet_watchAsset",
  params: customTokenInfo,
});

const customTokenInfo = {
  type: "ERC20",
  options: {
    address: "0xd00981105....fe7e037d935b513",
    symbol: "BWB",
    decimals: 18,
    image: "http://...",
  },
};

const added = await provider.request({
  method: "wallet_watchAsset",
  params: customTokenInfo,
});

主网及代币管理 ​

主网支持判断的通常做法 ​

主网添加 ​

什么是代币 ​

代币添加 ​

相关阅读 ​

主网及代币管理

主网支持判断的通常做法

主网添加

什么是代币

代币添加

相关阅读