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Adding a Celo Network to Coinbase Wallet

To add a Celo Network to your dApp, you can use Coinbaseā€™s RPC APIā€™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 youā€™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: "S-CELO", decimals: 18 },
  rpcUrls: ["https://forno.celo-sepolia.celo-testnet.org/"],
  blockExplorerUrls: ["https://celo-sepolia.blockscout.com/"],
  iconUrls: ["future"],
};

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Alfajores (deprecated)

const ALFAJORES_PARAMS = {
  chainId: "0xaef3",
  chainName: "Alfajores Testnet",
  nativeCurrency: { name: "Alfajores Celo", symbol: "S-CELO", decimals: 18 },
  rpcUrls: ["https://alfajores-forno.celo-testnet.org"],
  blockExplorerUrls: ["https://celo-alfajores.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 MetaMaskā€™s RPC APIā€™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 youā€™d like to connect to.
  • Where it says INSERT_SYMBOL_HERE, please replace with the correct symbol for the asset youā€™d like to watch. For Celo Dollars, itā€™s cUSD and for Celo Euros, itā€™s cEUR.
View available token addresses for Celo assets to add to Coinbase Wallet here.