DynamicSDK.instance.bitcoin.signPsbt signs a PSBT with the connected wallet. For batch signing, use signPsbts instead — same semantics, but takes a list of PSBT requests.
Sign a single PSBT
import 'package:dynamic_sdk/dynamic_sdk.dart';
final sdk = DynamicSDK.instance;
final wallet = sdk.wallets.userWallets.firstWhere(
(w) => w.chain == 'BTC',
);
final signedPsbt = await sdk.bitcoin.signPsbt(
walletId: wallet.id,
request: {
'unsignedPsbtBase64': unsignedPsbt,
},
);
print('Signed PSBT: $signedPsbt');
Parameters
| Parameter | Type | Description |
|---|
walletId | String | The id of a wallet whose chain == 'BTC'. |
request | Map<String, dynamic> | PSBT request. Must include unsignedPsbtBase64. |
Returns
Future<String> — the signed PSBT, base64-encoded. Pass it to sendRawTransaction to broadcast.
Sign multiple PSBTs
Batch-sign in a single call when you have several PSBTs to authorize at once:
final signedPsbts = await sdk.bitcoin.signPsbts(
walletId: wallet.id,
requests: [
{'unsignedPsbtBase64': psbt1},
{'unsignedPsbtBase64': psbt2},
],
);
print('Signed ${signedPsbts.length} PSBTs');
Parameters
| Parameter | Type | Description |
|---|
walletId | String | The id of a wallet whose chain == 'BTC'. |
requests | List<Map<String, dynamic>> | List of PSBT requests, each with unsignedPsbtBase64. |
Returns
Future<List<String>> — base64-encoded signed PSBTs, in the same order as requests.Last modified on May 12, 2026
