# Cardano

Cardano supports the following signature `kinds`:

* `Transaction`, unsigned transaction.

## Transaction

Signs an unsigned transaction.

| Field            | Description                                          | Type - Optional |
| ---------------- | ---------------------------------------------------- | --------------- |
| `blockchainKind` | `Cardano`                                            | String          |
| `kind`           | `Transaction`                                        | String          |
| `transaction`    | The unsigned hex encoded transaction as shown below. | String          |

```json
{
  "kind": "Transaction",
  "transaction": "0x84a3008182582082544414292ededfa716ae42af007ecff823c58796cb9ba60330699fb4d55d7901018282581d60112f2721059581f2a8f9986638359b83c567a61d5486ed0e16c818621a000cf4ae82581d60112f2721059581f2a8f9986638359b83c567a61d5486ed0e16c818621b0000000253db20cd021a00028785a0f5f6"
}
```

### Typescript Example with MeshJS SDK <a href="#typescript-example" id="typescript-example"></a>

First install the MeshJS SDK. You can find the full documentation here: <https://docs.meshjs.dev/>

You also need a service that tracks the account's UTXO, for example Blockfrost. [The Dfns TypeScript SDK](https://github.com/dfns/dfns-sdk-ts) has an example demonstrating how to write a custom Blockfrost initiator plugin for MeshJS.

Here a code sample to generate a signature via [the Dfns TypeScript SDK](https://github.com/dfns/dfns-sdk-ts):

```typescript
import { BlockfrostProvider, Transaction } from '@meshsdk/core'

const walletId = 'wa-6lbfv-9esgj-xxxxxxxxxxxxxxxx'
const wallet = await dfnsClient.wallets.getWallet({ walletId })

const provider = new BlockfrostProvider(process.env.BLOCKFROST_PROJECT_ID!)
const initiator = new CustomInitiator(wallet.address, provider)

const transaction = await new Transaction({ initiator })
  .sendLovelace('addr_test1vq5eele9enryyqkg4wrjyp7x4gpshvkr6rylkwtyau56g3qgrcks9', '1000000')
  .build()

const res = await dfnsClient.wallets.generateSignature({
  walletId,
  body: {
    kind: 'Transaction',
    transaction: `0x${transaction}`,
  },
})
```

## CIP-8

Signs an arbitrary message using [CIP-8](https://cips.cardano.org/cip/CIP-0008). Note: signing address depends on the targeted blockchain. Therefore it's tied to a specific `network` rather than the blockchain kind.

| Field     | Description                      | Type - Optional |
| --------- | -------------------------------- | --------------- |
| `network` | A supported Cardano network.     | String          |
| `kind`    | `Cip8`                           | String          |
| `context` | `Signature1`                     | String          |
| `payload` | The generic message hex encoded. | String          |

```json
{
  "network": "Cardano",
  "kind": "Cip8",
  "context": "Signature1",
  "payload": "0x49206c6f76652044666e73"
}
```