All RCP connections for working with the MetaMask API

rcp.js

const networks = {
    polygon: {
        chainId: `0x${Number(137).toString(16)}`,
        chainName: "Polygon Mainnet",
        nativeCurrency: {
            name: "MATIC",
            symbol: "MATIC",
            decimals: 18
        },
        rpcUrls: ["https://polygon-rpc.com/"],
        blockExplorerUrls: ["https://polygonscan.com/"]
    },
    bsc: {
      chainId: `0x${Number(56).toString(16)}`,
      chainName: "Binance Smart Chain Mainnet",
      nativeCurrency: {
          name: "Binance Chain Native Token",
          symbol: "BNB",
          decimals: 18
      },
      rpcUrls: [
          "https://bsc-dataseed1.binance.org",
          "https://bsc-dataseed2.binance.org",
          "https://bsc-dataseed3.binance.org",
          "https://bsc-dataseed4.binance.org",
          "https://bsc-dataseed1.defibit.io",
          "https://bsc-dataseed2.defibit.io",
          "https://bsc-dataseed3.defibit.io",
          "https://bsc-dataseed4.defibit.io",
          "https://bsc-dataseed1.ninicoin.io",
          "https://bsc-dataseed2.ninicoin.io",
          "https://bsc-dataseed3.ninicoin.io",
          "https://bsc-dataseed4.ninicoin.io",
          "wss://bsc-ws-node.nariox.org"
      ],
      blockExplorerUrls: ["https://bscscan.com"]
    },
    rinkeby: {
        chainId: `0x${Number(4).toString(16)}`,
        chainName: 'Rinkeby Test Network',
        nativeCurrency: {
            name: 'Rinkeby Ether',
            symbol: 'ETH',
            decimals: 18
        },
        rpcUrls: ['https://rinkeby-light.eth.linkpool.io/'],
        blockExplorerUrls: ['https://rinkeby.etherscan.io/']
    }
}