# Static Methods

You can access static methods directly on the `RippleAPI` class. For example, `RippleAPI.computeBinaryTransactionHash(...)`.

A few of the most commonly-used methods are documented below.

For a full list, refer to these docs:

- [XRP Ledger Hashes](https://github.com/ripple/ripple-lib/blob/develop/src/common/hashes/README.md)
- [ripple-address-codec API](https://github.com/ripple/ripple-address-codec/blob/master/README.md#api)

## computeBinaryTransactionHash

`computeBinaryTransactionHash(txBlobHex: string): string`

Returns the hash (id) of a binary transaction blob.

This is a static method on the `RippleAPI` class.

### Parameters

This method takes one parameter, a string containing a binary transaction in hex.

### Return Value

This method returns a string representing the transaction's id (hash).

### Example

```javascript
const signed_blob = '120000228000000024000B2E5A201B0066374B61400000003B9ACA0068400000000000000C732102356E89059A75438887F9FEE2056A2890DB82A68353BE9C0C0C8F89C0018B37FC74473045022100B3721EEB1ED6DFF29FB8B209E2DE6B54A0A6E44D52D926342F3D334BE98F08640220367A74107AD5DEAEFA3AB2984C161FC23F30B2704BB5CC984358BA262177A4568114F667B0CA50CC7709A220B0561B85E53A48461FA883142B71D8B09B4EE8DAA68FB936C23E3A974713BDAC'
if (typeof signed_blob === 'string' && signed_blob.match(/^[A-F0-9]+$/)) {
  const id = RippleAPI.computeBinaryTransactionHash(signed_blob)
  console.log('Transaction hash:', id')
}
```

```
Transaction hash: 80C5E11E1A21A626759D6CB944B33DBAAC66BD704A289C86E330B847904F5C13
```

[RunKit Example: computeBinaryTransactionHash](https://runkit.com/intelliot/computebinarytransactionhash-example)

## classicAddressToXAddress

`classicAddressToXAddress(classicAddress: string, tag: number | false[, test: boolean]): string`

Convert a classic address and tag to an X-address.

If `test` is `true`, the address starts with `T` to show that the address is intended for use on a test network.

### Example: Encode an X-address with tag 4294967295

```javascript
const RippleAPI = require('ripple-lib').RippleAPI
const xAddress = RippleAPI.classicAddressToXAddress('rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf', 4294967295)
console.log(xAddress)
```

```
XVLhHMPHU98es4dbozjVtdWzVrDjtV18pX8yuPT7y4xaEHi
```

### Example: Encode a test address for use with Testnet or Devnet

```javascript
const RippleAPI = require('ripple-lib').RippleAPI
const address = RippleAPI.classicAddressToXAddress('r3SVzk8ApofDJuVBPKdmbbLjWGCCXpBQ2g', 123, true)
console.log(address)
```

```
T7oKJ3q7s94kDH6tpkBowhetT1JKfcfdSCmAXbS75iATyLD
```

## xAddressToClassicAddress

`xAddressToClassicAddress(xAddress: string): {classicAddress: string, tag: number | false, test: boolean}`

Convert an X-address to a classic address and tag.

Since `0` is a valid tag, use `if (tag !== false)` to you want to check for a tag.

If the address is intended for use on a test network, `test === true`. Otherwise, `test === false`.

### Example

```javascript
const RippleAPI = require('ripple-lib').RippleAPI
const address = RippleAPI.xAddressToClassicAddress('XVLhHMPHU98es4dbozjVtdWzVrDjtV18pX8yuPT7y4xaEHi')
console.log(address)
```

```
{
  classicAddress: 'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
  tag: 4294967295,
  test: false
}
```