# Resolver - Via - EIN Transfer

All `via` contracts can be leveraged to perform their respective operations on a token transfer prior to transfer to its end-destination `EIN` using the `transferHydroBalanceToVia` function. Resolvers may call the `transferHydroBalanceToVia` function with the arguments defined below.

**ARGUMENTS**

| Parameter | Type      | Description                                                    |
| --------- | --------- | -------------------------------------------------------------- |
| `via`     | `address` | `via` contract address being used in the function call.        |
| `einTo`   | `uint`    | Recipient `EIN` - receives transfer through `via`contract.     |
| `amount`  | `uint`    | Amount of HYDRO to be transferred.                             |
| `_bytes`  | `bytes`   | Arbitrary - should be defined in `via` contract documentation. |