> ## Documentation Index
> Fetch the complete documentation index at: https://www.dynamic.xyz/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Send Bitcoin

> Transfer BTC using the high-level sendBitcoin method in the Dynamic Flutter SDK.

`DynamicSDK.instance.bitcoin.sendBitcoin` builds, signs, and broadcasts a Bitcoin transfer in a single call. Use it when you don't need to inspect or modify the PSBT before broadcast — see [Build a PSBT](/flutter/wallets/bitcoin/build-psbt) and [Sign a PSBT](/flutter/wallets/bitcoin/sign-psbt) for the manual flow.

## Example

```dart theme={"system"}
import 'package:dynamic_sdk/dynamic_sdk.dart';

final sdk = DynamicSDK.instance;
final wallet = sdk.wallets.userWallets.firstWhere(
  (w) => w.chain == 'BTC',
);

final txId = await sdk.bitcoin.sendBitcoin(
  walletId: wallet.id,
  recipientAddress: 'bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh',
  amount: '50000',          // 50_000 sats = 0.0005 BTC
  feePriority: 'medium',    // optional: 'high', 'medium', or 'low'
);
print('Broadcasted: $txId');
```

## Parameters

| Parameter          | Type      | Description                                                                  |
| ------------------ | --------- | ---------------------------------------------------------------------------- |
| `walletId`         | `String`  | The id of a wallet whose `chain == 'BTC'`.                                   |
| `recipientAddress` | `String`  | Destination address.                                                         |
| `amount`           | `String`  | Amount **in satoshis**, encoded as a string to preserve precision.           |
| `feePriority`      | `String?` | Fee tier: `'high'`, `'medium'`, or `'low'`. Defaults are connector-specific. |

## Returns

`Future<String>` — the broadcasted transaction id (txid).

## Converting BTC to satoshis

`amount` is always a satoshi string. `1 BTC = 100,000,000 satoshis`. Convert from a user-supplied BTC value before calling:

```dart theme={"system"}
String btcToSats(double btc) =>
    BigInt.from((btc * 100000000).round()).toString();

final txId = await sdk.bitcoin.sendBitcoin(
  walletId: wallet.id,
  recipientAddress: 'bc1q...',
  amount: btcToSats(0.001), // '100000'
);
```