# Conversions

Utility class for encoding/decoding between Base16, Base64, and hex, plus CSPR ↔ motes conversion.

## Import

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

## Class

### `Conversions`

All methods are static.

### Encoding

```ts
Conversions.encodeBase16(bytes: Uint8Array): string
Conversions.decodeBase16(base16String: string): Uint8Array

Conversions.encodeBase64(bytes: Uint8Array): string
Conversions.decodeBase64(base64String: string): Uint8Array

Conversions.base64to16(base64: string): string  // Base64 → Base16
```

### CSPR ↔ Motes

1 CSPR = 10⁹ motes (1,000,000,000).

```ts
Conversions.csprToMotes(cspr: string | number): BigNumber
Conversions.motesToCSPR(motes: BigNumberish): string
```

## Usage

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

// Hex encoding
const hex = Conversions.encodeBase16(new Uint8Array([1, 2, 3]));
// '010203'

const bytes = Conversions.decodeBase16('010203');
// Uint8Array [1, 2, 3]

// Base64
const b64 = Conversions.encodeBase64(new Uint8Array([1, 2, 3]));
const back = Conversions.decodeBase64(b64);

// CSPR ↔ Motes
const motes = Conversions.csprToMotes('2.5');
// BigNumber { value: '2500000000' }

const cspr = Conversions.motesToCSPR('2500000000');
// '2.5'
```

## See Also

- [`ByteConverters`](/types/byte-converters) - Low-level byte serialization
- [`HexBytes`](/types/hex-bytes) - Bytes wrapper with `.toHex()`