Connect to Device

According to the workflow, you need to synchronize the hardware wallet data before initiating a transaction. This article introduces how to synchronize wallet data through the SDK.

tip

The private key will never be exported from the hardware wallet.

APIs

MultiAccount

The MultiAccount class is used to synchronize all currency information of the hardware wallet.

Map<String, dynamic> parseMultiAccounts(UR ur)；

Parameters

Input Parameter is a UR object, which is the output of URDecoder.

Returns

• device: the device model name.

• masterFingerprint: the master fingerprint.

• keys: the hdkey list.

• deviceId: the device ID, such as serial numbers.

• version: The versions.

• nickName: the wallet account name.

Example

import 'package:gs_ur_dart/gs_ur_dart.dart';

typedef SuccessCallback = void Function(UR);
final SuccessCallback onSuccess;

final QRViewController controller；

controller.scannedDataStream.listen((event) {
  URDecoder urDecoder = URDecoder();
  urDecoder.receivePart(event.code);
  double progress = urDecoder.getProgress();
  if (urDecoder.isComplete()) {
    final UR result = urDecoder.resultUR();
    if (!succeed) {
      onSuccess(result);
      succeed = true;
    }
  }
});

onSuccess(UR ur){
  final account = parseMultiAccounts(ur);
}

If successfully synchronized, you can get wallet information similar to the following content:

{
  "device": "GSWALLET",
  "masterFingerprint": "27c3831f",
  "keys": [
    {
      "chain": "BTC",
      "path": "m/44'/0'/0'",
      "publicKey":
          "037fb66bad14245d08994f715480b276b73fd33e109f94f589021be6275984c861",
      "name": null,
      "xfp": "27c3831f",
      "chainCode":
          "529aa275a0e19c9d3e0fc82381927f9b63f8dbcc8332d1c36250db6ede23aba4",
      "extendedPublicKey":
          "xpub6CdezvjFXdc95pLVoAAfGEnS9MyVW1d763AMwDzDgr6aj6Fx67kzxmq3ugpSxYLHi6A8yNciYxTjg3sPy5UAJQptMwH2gBm4APtsrT3pd51",
      "note": "{\"chain\":[\"Bitcoin\"]}"
    },
    {
      "chain": "BTC",
      "path": "m/86'/0'/0'",
      "publicKey":
          "033cdf0f1101dbf2e4a877b6b779aa59d345cb649c507cef76928e68c00789f83a",
      "name": null,
      "xfp": "27c3831f",
      "chainCode":
          "30884b52c8ed7c80eb42d967c62a3e26e5f5ea8c071f2a0bb3c47c7f4604de24",
      "extendedPublicKey":
          "xpub6DUp5pGy2P3emgQgoes1Qqmf2SmVB4c6tXAqcgDuKfXmNMv7kdnXmmFFcrNmaTbZiN4bNDcrEd6rHxkUE24J3Ehj14CVuGtJQhQhoccgAyZ",
      "note": "{\"chain\":[\"Bitcoin\"]}"
    },
    {
      "chain": "ETH",
      "path": "m/44'/60'/0'",
      "publicKey":
          "0377d99c1b2762804f04263aeb470f9a89ece15cbc44977249e5c8e4843126dd27",
      "name": null,
      "xfp": "27c3831f",
      "chainCode":
          "b154fee3bf6210099ba1eab2c86fe525fc63abe1c8509abe88aa814574cc6e60",
      "extendedPublicKey":
          "xpub6DHPziqQ7we7dDW3MfEZN6GiTpj6mXM9SFdtu3gBvVUYm3D1LQHk6Cpf6DfBWojtwqPqHggXKqVqPacAV5R2MHqfJuECXZHFNxekjd4L31N",
      "note":
          "{\"chain\":[\"Ethereum\", \"BNB\", \"Polygon\", \"zkSync_Era\", \"Base\", \"Fantom\", \"Optimism\", \"Avalanche\", \"Arbitrum\"]}"
    },

    ...

    {
      "chain": "KAS",
      "path": "m/44'/111111'/0'",
      "publicKey":
          "02075aefa9ab67f17d9eb60854e2d6357859d4df67810315edc0573f61208063a9",
      "name": null,
      "xfp": "27c3831f",
      "chainCode":
          "bcb27cad4ccda2b6d0a450d76c65a5c1f8f518b4b531482a7dc9f66474b0ab5b",
      "extendedPublicKey":
          "xpub6CyUGvaHsKmHKSgyTssHgZUcdymuNxwcVY431h6psm1J57mftsgyhioCErvohw5fRLj5jnbNuQ9J4m6JZ7GkRCmZhS24SrcgTVxK1hAvdFe",
      "note": "{\"chain\":[\"Kaspa\"]}"
    }
  ],
  "deviceId": "HQ01BI4217DE2973",
  "version": "0.0.7",
  "nickName": "baby"
}