# makeCep18TransferTransaction

Creates a `Transaction` for transferring CEP-18 (ERC-20 compatible) fungible tokens. Supports both Casper 1.x (wraps a Deploy) and Casper 2.0 (uses `ContractCallBuilder`).

## Import

```ts
import { makeCep18TransferTransaction } from 'casper-js-sdk';
```

## Usage

```ts
const tx = makeCep18TransferTransaction({
  contractPackageHash: 'abc123...',
  senderPublicKeyHex: privateKey.publicKey.toHex(),
  recipientPublicKeyHex: recipientPublicKey.toHex(),
  transferAmount: '1000000000',  // token amount in smallest unit
  paymentAmount: '3000000000',   // 3 CSPR gas
  chainName: 'casper',
  casperNetworkApiVersion: '2.0',
});

tx.sign(privateKey);
const result = await rpcClient.putTransaction(tx);
```

## Parameters

| Parameter | Type | Required | Default |
|---|---|---|---|
| `contractPackageHash` | `string` | yes | - |
| `senderPublicKeyHex` | `string` | yes | - |
| `recipientPublicKeyHex` | `string` | yes | - |
| `transferAmount` | `string` | yes | - |
| `paymentAmount` | `string` | yes | - |
| `casperNetworkApiVersion` | `string` | yes | - |
| `chainName` | `string` | no | `'casper'` |
| `ttl` | `number` | no | `1800000` |
| `timestamp` | `string` | no | now |
| `gasPrice` | `number` | no | `1` |

### casperNetworkApiVersion

Pass the API version string from `rpcClient.getStatus()`. If it starts with `'2.'`, a `TransactionV1` is built via `ContractCallBuilder`. Otherwise a legacy `Deploy` is wrapped in a `Transaction`.

```ts
const status = await rpcClient.getStatus();
const tx = makeCep18TransferTransaction({
  // ...
  casperNetworkApiVersion: status.apiVersion,
});
```

## Return Value

`Transaction`

## Related

- [`makeCep18TransferDeploy`](/utilities/makeCep18TransferDeploy) - Deploy-only version for 1.x nodes