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btcgetpublickey.md

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btcGetPublicKey

Bitcoin: get public key

Retrieves BIP32 extended public derived by given BIP32 path. User is presented with a description of the requested key and asked to confirm the export.

const result = await HardwareSDK.btcGetPublicKey(connectId, deviceId, params);

Params

Optional common params

Exporting single public key

  • path — required string | Array<number> minimum length is 1. read more
  • showOnOneKey — optional boolean determines if address will be displayed on device. Default is set to true
  • coin - optional string determines network definition specified in coins.json file. Coin shortcut, name or label can be used. If coin is not set API will try to get network definition from path.
  • scriptType - optional InputScriptType, address script type

Exporting bundle of public keys

  • bundle - Array of Objects with path, coin fields

Example

Return public key of fifth bitcoin account:

HardwareSDK.btcGetPublicKey(connectId, deviceId, {
    path: "m/49'/0'/4'",
    coin: "btc"
});

Return a bundle of public keys for multiple bitcoin accounts:

HardwareSDK.btcGetPublicKey(connectId, deviceId, {
    bundle: [
        { path: "m/49'/0'/0'" }, // account 1
        { path: "m/49'/0'/1'" }, // account 2
        { path: "m/49'/0'/2'" }  // account 3
    ]
});

Result

Result with only one public key

{
    success: true,
    payload: {
        path: Array<number>, // hardended path
        xpub: string,        // xpub in legacy format
        xpubSegwit?: string, // optional for segwit accounts: xpub in segwit format
        chainCode: string,   // BIP32 serialization format
        childNum: number,    // BIP32 serialization format
        publicKey: string,   // BIP32 serialization format
        fingerprint: number, // BIP32 serialization format
        depth: number,       // BIP32 serialization format
    }
}

Read more about BIP32 serialization format

Result with bundle of public keys

{
    success: true,
    payload: [
        { path, serializedPath, xpub, xpubSegwit?, chainCode, childNum, publicKey, fingerprint, depth }, // account 1
        { path, serializedPath, xpub, xpubSegwit?, chainCode, childNum, publicKey, fingerprint, depth }, // account 2
        { path, serializedPath, xpub, xpubSegwit?, chainCode, childNum, publicKey, fingerprint, depth }  // account 3
    ]
}

Error

{
    success: false,
    payload: {
        error: string, // error message
        code: number // error code
    }
}