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Adding a Celo Network to Coinbase Wallet

To add a Celo Network to your dApp, you can use Coinbase’s RPC API’s wallet_addEthereumChain method. (See documentation). Here is a JavaScript snippet you can use: 
await window.ethereum.request({
    method: 'wallet_addEthereumChain',
    params: [<INSERT_NETWORK_PARAMS_HERE>],
});
Where it says INSERT_NETWORK_PARAMS_HERE, please replace with any of the following constants, depending on which network you’d like to connect to.

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Mainnet

const CELO_PARAMS = {
  chainId: "0xa4ec",
  chainName: "Celo",
  nativeCurrency: { name: "Celo", symbol: "CELO", decimals: 18 },
  rpcUrls: ["https://forno.celo.org"],
  blockExplorerUrls: ["https://celo.blockscout.com/"],
  iconUrls: ["future"],
};

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Celo Sepolia

const CELO_SEPOLIA_PARAMS = {
  chainId: "0xAA044C",
  chainName: "Celo Sepolia",
  nativeCurrency: { name: "Celo", symbol: "CELO", decimals: 18 },
  rpcUrls: ["https://forno.celo-sepolia.celo-testnet.org/"],
  blockExplorerUrls: ["https://celo-sepolia.blockscout.com/"],
  iconUrls: ["future"],
};

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Adding Tokens (e.g. cUSD, cEUR)

To watch an asset on a Celo netowork (e.g. cUSD, cEUR) in your dApp, you can use MetaMask’s RPC API’s wallet_watchAsset method. (See documentation). Here is a JavaScript snippet you can use: 
await window.ethereum.request({
  method: "wallet_watchAsset",
  params: {
    type: "ERC20",
    options: {
      address: "<INSERT_ADDRESS_HERE>",
      symbol: "<INSERT_SYMBOL_HERE>",
      decimals: 18,
    },
    iconUrls: ["future"],
  },
});
  • Where it says INSERT_ADDRESS_HERE, please replace with any of the following constants, depending on which network and which asset you’d like to connect to.
  • Where it says INSERT_SYMBOL_HERE, please replace with the correct symbol for the asset you’d like to watch. For Celo Dollars, it’s cUSD and for Celo Euros, it’s cEUR.
View available token addresses for Celo assets to add to Coinbase Wallet here.