# ConstructionPreprocessResponse
ConstructionPreprocessResponse contains `options` that will be sent unmodified to `/construction/metadata`. If it is not necessary to make a request to `/construction/metadata`, `options` should be omitted. Some blockchains require the PublicKey of particular AccountIdentifiers to construct a valid transaction. To fetch these PublicKeys, populate `required_public_keys` with the AccountIdentifiers associated with the desired PublicKeys. If it is not necessary to retrieve any PublicKeys for construction, `required_public_keys` should be omitted.
## Example Usage
```typescript
import { ConstructionPreprocessResponse } from "icpmcp-rosetta-api";
let value: ConstructionPreprocessResponse = {
requiredPublicKeys: [
{
address: "0x3a065000ab4183c6bf581dc1e55a605455fc6d61",
subAccount: {
address: "0x6b175474e89094c44da98b954eedeac495271d0f",
},
},
],
};
```
## Fields
| Field | Type | Required | Description |
| -------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------- |
| `options` | [models.ConstructionPreprocessResponseOptions](../models/constructionpreprocessresponseoptions.md) | :heavy_minus_sign: | The options that will be sent directly to `/construction/metadata` by the caller. |
| `requiredPublicKeys` | [models.AccountIdentifier](../models/accountidentifier.md)[] | :heavy_minus_sign: | N/A |
