sdk-monorepo/@tornado/sdk-data/resources/onchain/tokens.json

{
    "1": {
        "dai": {
            "address": "0x6B175474E89094C44Da98b954EedeAC495271d0F",
            "decimals": 18
        },
        "usdc": {
            "address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
            "decimals": 6
        }
    }
}