# prepareTransactionForSigning

The `prepareTransactionForSigning` method prepares an EVM transaction for MPC signing by adding necessary fields like gas estimation, nonce, and chain ID.

## Usage

```ts twoslash
// [!include ~/snippets/code/chains.ts]
// ---cut---
const { transaction, hashesToSign } =
  await evmChain.prepareTransactionForSigning({
    from: '0x8626f6940E2eb28930eFb4CeF49B2d1F2C9C1199' as `0x${string}`,
    to: '0x742d35Cc6634C0532925a3b844Bc454e4438f44e',
    value: 1n, // 1 wei
    data: '0x', // Empty data for a simple ETH transfer
  })
```

## Parameters

| Parameter            | Type                    | Description                    |
| -------------------- | ----------------------- | ------------------------------ |
| `transactionRequest` | `EVMTransactionRequest` | The transaction request object |

## Returns

| Property       | Type                     | Description                                       |
| -------------- | ------------------------ | ------------------------------------------------- |
| `transaction`  | `EVMUnsignedTransaction` | The prepared transaction with all required fields |
| `hashesToSign` | `HashToSign[]`           | Array of hash(es) to be signed by the MPC network |