Function tokenToUsd

tokenToUsd(
    client: {},
    network: EVMNetworkId,
    tokenAmount: bigint,
    tokenSymbol: string,
    tokenDecimals: number,
): Promise<number>
Convert token amount to USD using Chainlink price feed
Parameters
- client: {}
  Viem public client
- network: EVMNetworkId
  Network identifier
- tokenAmount: bigint
  Amount in token's smallest unit
- tokenSymbol: string
  Token symbol (ETH, LINK, etc.)
- tokenDecimals: number
  Token decimals
Returns Promise<number>
Amount in USD
Example
```
// Convert 1 ETH to USD
const usd = await tokenToUsd(client, 'eip155:8453', parseEther('1'), 'ETH', 18);
console.log(`1 ETH = $${usd}`);
```
- Defined in utils/chainlink.ts:259