addchain.md

Add a New Blockchain

To add a new blockchain take the following steps

Step 1: New chain scan key

Modify the .env file to add the API key to scan the new blockchain for transactions, addresses, tokens, prices etc. (example Etherscan API key for Ethereum)

Step 2:

Go to the file config/config.js and create a new API key variable for the new chain

    etherScanKey: envVars.ETHERSCAN_KEY,
    polyScanKey: envVars.POLYSCAN_KEY,
    newChainScanKey: envVars.NewChain_KEY,

Step 3:

Go to the file config/constants.js and make the following additions

• Add chain id const SupportedChainId = { MAINNET: 1, GOERLI: 5, POLYGON: 137, NewChain: chainid }

• Add Gnosis Safe API endpoint

    const GNOSIS_API_ENDPOINT  = {
    [SupportedChainId.GOERLI]: "https://safe-transaction-goerli.safe.global",
    [SupportedChainId.POLYGON]: 'https://safe-transaction-polygon.safe.global',
    [SupportedChainId.MAINNET]: 'https://safe-transaction-mainnet.safe.global',
    [SupportedChainId.New_Chain_Name]: 'URL'
    }
  

• Add Infura url for the new chain

    const INFURA_NETWORK_URLS = (INFURA_KEY) => {
      return {
        [SupportedChainId.MAINNET]: `https://mainnet.infura.io/v3/${INFURA_KEY}`,
        [SupportedChainId.GOERLI]: `https://goerli.infura.io/v3/${INFURA_KEY}`,
        [SupportedChainId.POLYGON]: `https://polygon-mainnet.infura.io/v3/${INFURA_KEY}`,
        [SupportedChainId.New_Chain_Name]: `URL${INFURA_KEY}`
      }
    }
  

• Add network scan link for the new chain

    const NETWORK_SCAN_LINKS = {
      [SupportedChainId.MAINNET]: { 
        baseUrl: `https://api.etherscan.io/`,
        apiKey: config.etherScanKey
      },
      [SupportedChainId.New_Chain_Name]: { 
        baseUrl: `URL`,
        apiKey: config.newChainScanKey
      },