## Offline functionality

RippleAPI can also function without internet connectivity. This can be useful in order to generate secrets and sign transactions from a secure, isolated machine.

To instantiate RippleAPI in offline mode, use the following boilerplate code:

```javascript
const RippleAPI = require('ripple-lib').RippleAPI;

const api = new RippleAPI();
/* insert code here */
```

Methods that depend on the state of the XRP Ledger are unavailable in offline mode. To prepare transactions offline, you **must** specify  the `fee`, `sequence`, and `maxLedgerVersion` parameters in the [transaction instructions](#transaction-instructions). You can use the following methods while offline:

* [preparePayment](#preparepayment)
* [prepareTrustline](#preparetrustline)
* [prepareOrder](#prepareorder)
* [prepareOrderCancellation](#prepareordercancellation)
* [prepareSettings](#preparesettings)
* [prepareEscrowCreation](#prepareescrowcreation)
* [prepareEscrowCancellation](#prepareescrowcancellation)
* [prepareEscrowExecution](#prepareescrowexecution)
* [sign](#sign)
* [generateAddress](#generateaddress)
* [computeLedgerHash](#computeledgerhash)