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Coinbase Wallet Programmatic Setup on Celo

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.

Mainnet​

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

Alfajores​

const ALFAJORES_PARAMS = {
  chainId: "0xaef3",
  chainName: "Alfajores Testnet",
  nativeCurrency: { name: "Alfajores Celo", symbol: "A-CELO", decimals: 18 },
  rpcUrls: ["https://alfajores-forno.celo-testnet.org"],
  blockExplorerUrls: ["https://alfajores-blockscout.celo-testnet.org/"],
  iconUrls: ["future"],
};

Baklava​

const BAKLAVA_PARAMS = {
  chainId: "0xf370",
  chainName: "Baklava Testnet",
  nativeCurrency: { name: "Baklava Celo", symbol: "B-CELO", decimals: 18 },
  rpcUrls: ["https://baklava-forno.celo-testnet.org"],
  blockExplorerUrls: ["https://baklava-blockscout.celo-testnet.org/"],
  iconUrls: ["future"],
};

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.
tip

View available token addresses for Celo assets to add to Coinbase Wallet here.