# CoinChange
CoinChange is used to represent a change in state of a some coin identified by a coin_identifier. This object is part of the Operation model and must be populated for UTXO-based blockchains. Coincidentally, this abstraction of UTXOs allows for supporting both account-based transfers and UTXO-based transfers on the same blockchain (when a transfer is account-based, don't populate this model).
## Example Usage
```typescript
import { CoinChange } from "icpmcp-rosetta-api";
let value: CoinChange = {
coinIdentifier: {
identifier:
"0x2f23fd8cca835af21f3ac375bac601f97ead75f2e79143bdf71fe2c4be043e8f:1",
},
coinAction: "coin_created",
};
```
## Fields
| Field | Type | Required | Description |
| -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `coinIdentifier` | [models.CoinIdentifier](../models/coinidentifier.md) | :heavy_check_mark: | CoinIdentifier uniquely identifies a Coin. |
| `coinAction` | [models.CoinAction](../models/coinaction.md) | :heavy_check_mark: | CoinActions are different state changes that a Coin can undergo. When a Coin is created, it is coin_created. When a Coin is spent, it is coin_spent. It is assumed that a single Coin cannot be created or spent more than once. |
