Supported Assets

isSupported

TypeScript Example

Note: This example assumes you have a publicClient configured in your code base. Please refer to https://viem.sh/docs/clients/public for detailed documentation.

import { createPublicClient, http, parseAbiItem, isAddress, type Address } from "viem";
import { mainnet } from "viem/chains";

// 1. The contract address and the ABI for the getter function
// Using 'as const' helps TypeScript infer the types more strictly.
const tellerAbi = [
  /* ... (start of ABI) ... */
  {
    inputs: [{ internalType: "contract ERC20", name: "", type: "address" }],
    name: "isSupported",
    outputs: [{ internalType: "bool", name: "", type: "bool" }],
    stateMutability: "view",
    type: "function",
  },
  /* ... (rest of the ABI) ... */
] as const;

// --- Configuration ---
const tellerAddress = "0x..."; // <-- Vault Teller Address

// 1. Define an async function to call the contract
async function checkIsSupported(tokenAddress: Address) {
  // A friendly message to indicate that the address needs to be replaced.
  if (!isAddress(contractAddress)) {
    console.error(
      "Please replace '0x...' with your smart contract's address in the script.",
    );
    return;
  }

  try {
    // 2. Use `readContract` to interact with the 'isSupported' view function
    const isSupported = await publicClient.readContract({
      address: tellerAddress,
      abi: tellerAbi,
      functionName: "isSupported",
      // The 'args' array corresponds to the function's arguments.
      // In this case, the public mapping's getter takes one argument: the address to look up.
      args: [tokenAddress],
    });

    return isSupported;
  } catch (err) {
    console.error("Error reading from contract:", err);
  }
}

// 5. Execute the function with the example token address
checkIsSupported(usdcAddress);