# ConstructionPreprocessRequest
ConstructionPreprocessRequest is passed to the `/construction/preprocess` endpoint so that a Rosetta implementation can determine which metadata it needs to request for construction. Metadata provided in this object should NEVER be a product of live data (i.e. the caller must follow some network-specific data fetching strategy outside of the Construction API to populate required Metadata). If live data is required for construction, it MUST be fetched in the call to `/construction/metadata`.
## Example Usage
```typescript
import { ConstructionPreprocessRequest } from "icpmcp-rosetta-api";
let value: ConstructionPreprocessRequest = {
networkIdentifier: {
blockchain: "bitcoin",
network: "mainnet",
subNetworkIdentifier: {
network: "shard 1",
metadata: {},
},
},
operations: [
{
operationIdentifier: {
index: 5,
networkIndex: 0,
},
relatedOperations: [
{
index: 1,
},
{
index: 2,
},
],
type: "Transfer",
status: "Reverted",
account: {
address: "0x3a065000ab4183c6bf581dc1e55a605455fc6d61",
subAccount: {
address: "0x6b175474e89094c44da98b954eedeac495271d0f",
},
},
amount: {
value: "1238089899992",
currency: {
symbol: "BTC",
decimals: 8,
metadata: {},
},
},
coinChange: {
coinIdentifier: {
identifier:
"0x2f23fd8cca835af21f3ac375bac601f97ead75f2e79143bdf71fe2c4be043e8f:1",
},
coinAction: "coin_spent",
},
metadata: {},
},
],
};
```
## Fields
| Field | Type | Required | Description |
| -------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------- |
| `networkIdentifier` | [models.NetworkIdentifier](../models/networkidentifier.md) | :heavy_check_mark: | The network_identifier specifies which network a particular object is associated with. |
| `operations` | [models.Operation](../models/operation.md)[] | :heavy_check_mark: | N/A |
| `metadata` | [models.ConstructionPreprocessRequestMetadata](../models/constructionpreprocessrequestmetadata.md) | :heavy_minus_sign: | N/A |
