@secux/app-btc

SecuX Hardware Wallet BTC API

Usage

import { SecuxBTC, ScriptType } from "@secux/app-btc";

First, create instance of ITransport.

• Web Usb
• Web Bluetooth
• React Native Bluetooth

Examples

1. Get address by purpose and script type.

   • tweaked key-spend only address (default script: P2TR)

     const path = "m/86'/0'/0'/0/0";
     const address = await device.getAddress(path);
     
     /*
     
     // transfer data to hardware wallet by custom transport layer.
     const data = SecuxBTC.prepareAddress(path);
     const response = await device.Exchange(data);
     const address = SecuxBTC.resolveAddress(response, path);
     
     */

   • native segwit address (default script: P2WPKH)

     const address = await device.getAddress("m/84'/0'/0'/0/0");

   • segwit address (default script: P2SH_P2WPKH)

     const address = await device.getAddress("m/49'/0'/0'/0/0");

   • legacy address (default script: P2PKH)

     const address = await device.getAddress("m/44'/0'/0'/0/0");

2. For bitcoin ecosystem, you can use specific cointype by the coin.

   • native segwit address for dogecoin

     const address = await device.getAddress("m/84'/3'/0'/0/0");

   • segwit address for litecoin

     const address = await device.getAddress("m/49'/2'/0'/0/0");

   • legacy address for bitcoincash

     const address = await device.getAddress("m/44'/145'/0'/0/0");

   • you can refer to here for cointype.

3. Sign transaction.

const inputs = [
    {
        hash: "0b062e71e165fba9634d9fb1b5ba703e774bf374815b1f5a617c8d1e7d43dc01",
        vout: 0,
        // optional, give raw transaction data for checking
        txHex: "0100000001b103a004f672080ceae8277e83c296b5ac090ae78157979211da3e2d41399d1b010000006b483045022100f19d88e6a17789dc399ff2a93b4516bb44af32928d4986138f1a4f7f37ab277b022046fc14c958bc8aa97fea1d2fbf80982534cf51634d46c4d5178e5ca6698bca07012102f8667cfb5b80c3695e3f0c9078589cb04e8d15e71bdae89ebf24b82f9d663d5cffffffff02bc020000000000001976a9145c592f40134c6179a1ce5b06b28d5c2ae443113188ac00040000000000001976a9146d65ced4ef49e23cdbb4be9d510b38e5be28e10688ac00000000",
        satoshis: 700,
        path: "m/44'/0'/0'/0/0",
        // for custom transport layer, each utxo need publickey.
        // publickey: "03aaeb52dd7494c361049de67cc680e83ebcbbbdbeb13637d92cd845f70308af5e"
    },
    {
        hash: "07ad0a13e501d292bc8b9e16a3a8b62f99f77ab9e37ea8d3b8453984a2899984",
        vout: 0,
        // optional, you can use specific script for each input
        // script: ScriptType.P2SH_P2PKH,
        satoshis: 6000,
        path: "m/49'/0'/0'/0/0",
        // for custom transport layer, each utxo need publickey.
        // publickey: "039b3b694b8fc5b5e07fb069c783cac754f5d38c3e08bed1960e31fdb1dda35c24"
    },
    {
        hash: "8686aee2b9dcf559798b9718ed26ca92e0c64bef11c433e576cae658678c497d",
        vout: 1,
        satoshis: 1083,
        path: "m/84'/0'/0'/1/0",
        // for custom transport layer, each utxo need publickey.
        // publickey: "03025324888e429ab8e3dbaf1f7802648b9cd01e9b418485c5fa4c1b9b5700e1a6"
    }
];

const to = {
    address: "bc1qs0k3ekx0z7a7yuq3lse7prw373s8cr8lhxvccd",
    satoshis: 1500
};

const utxo = {
    path: "m/44'/0'/0'/0/0",
    satoshis: 6100,
    // for custom transport layer, each utxo need publickey.
    // publickey: "03aaeb52dd7494c361049de67cc680e83ebcbbbdbeb13637d92cd845f70308af5e"
};

const obj = await device.sign(
    inputs, 
    { to, utxo },
    // given feeRate to estimate fee, and fee will be changed if greater than estimated value or less than minimal fee.
    // { feeRate: 1 } 
);

const rspList = [];
for (const cmd of obj.multi_command) {
    const rsp = await transport.Exchange(cmd);
    rspList.push(rsp);
}
const signed = SecuxBTC.resolveTransaction(rspList, obj);

/*

// transfer data to hardware wallet by custom transport layer.
const { commands, rawTx } = SecuxBTC.prepareSign(inputs, { to, utxo });
const rspList = [];
for (const cmd of commands) {
    const rsp = await transport.Exchange(cmd);
    rspList.push(rsp);
}
const signed = SecuxBTC.resloveTransaction(rspList, {
    rawTx, 
    publickeys: inputs.map(x => x.publickey),
});

*/

4. Derive address from xpub, ypub, or zpub.

   • tweaked key-spend only address (default script: P2TR)

     // m/86'/0'/0'
     const xpub = "xpub6BgBgsespWvERF3LHQu6CnqdvfEvtMcQjYrcRzx53QJjSxarj2afYWcLteoGVky7D3UKDP9QyrLprQ3VCECoY49yfdDEHGCtMMj92pReUsQ";
     // m/86'/0'/0'/0/0
     const address = SecuxBTC.deriveAddress(xpub, 0, 0,
     {
         // you can use specific coin
         // coin: CoinType.BITCOIN,
         script: ScriptType.P2TR
     });

   • native segwit address (default script: P2WPKH)

     // m/84'/0'/0'
     const zpub = "zpub6rFR7y4Q2AijBEqTUquhVz398htDFrtymD9xYYfG1m4wAcvPhXNfE3EfH1r1ADqtfSdVCToUG868RvUUkgDKf31mGDtKsAYz2oz2AGutZYs";
     // m/84'/0'/0'/0/0
     const address = SecuxBTC.deriveAddress(zpub, 0, 0,
     {
         // you can use specific coin and script
         // coin: CoinType.DOGECOIN,
         // script: ScriptType.P2WPKH
     });

   • segwit address (default script: P2SH_P2WPKH)

     // m/49'/0'/1'
     const ypub = "ypub6Ww3ibxVfGzLtJR4F9SRBicspAfvmvw54yern9Q6qZWFC9T6FYA34K57La5Sgs8pXuyvpDfEHX5KNZRiZRukUWaVPyL4NxA69sEAqdoV8ve";
     // m/49'/0'/1'/0/1
     const address = SecuxBTC.deriveAddress(ypub, 0, 1);

   • legacy address (default script: P2PKH)

     // m/44'/0'/0'
     const xpub = "xpub6BosfCnifzxcFwrSzQiqu2DBVTshkCXacvNsWGYJVVhhawA7d4R5WSWGFNbi8Aw6ZRc1brxMyWMzG3DSSSSoekkudhUd9yLb6qx39T9nMdj";
     // m/44'/0'/0'/1/0
     const address = SecuxBTC.deriveAddress(xpub, 1, 0);

5. Estimate transaction size

const size = SecuxBTC.getVirtualSize(
    // your inputs
    [
        ScriptType.P2PKH,
        ScriptType.P2SH_P2WPKH,
        ScriptType.P2SH_P2WPKH,
        ScriptType.P2WPKH,
        ...
    ],
    // your outputs
    [
        ScriptType.P2PKH,
        ScriptType.P2PKH,
        ScriptType.P2WPKH,
        ...
    ]
);

API Reference

ERROR, Cannot find class.

ScriptType : enum

Properties

Name	Type	Description
P2PKH	number	0
P2WPKH	number	1
P2SH_P2PKH	number	2
P2SH_P2WPKH	number	3
P2TR	number	4

CoinType : enum

Properties

Name	Type	Description
BITCOIN	number	0
TESTNET	number	1
REGTEST	number	2
LITECOIN	number	3
BITCOINCASH	number	4
GROESTL	number	5
DIGIBYTE	number	6
DASH	number	7
DOGECOIN	number	8

PathObject : object

Properties

Name	Type	Description
coin	CoinType	enum
script	ScriptType	enum

AddressOption : object

Properties

Name	Type	Description
[coin]	CoinType	enum
[script]	ScriptType	enum

txInput : object

Properties

Name	Type	Description
path	string	BIP32 path refer to utxo
publickey	string | Buffer	scep256k1 publickey from path
hash	string	referenced transaction hash
vout	number	referenced transaction output index
satoshis	number | string	referenced transaction output amount
[script]	ScriptType	script type related to path
[txHex]	string	referenced raw transaction for validation

txOutput : object

Properties

Name	Type	Description
to	txOutputAddress | txOutputScriptExtened	receiving address information
[utxo]	txOutputScriptExtened	changes

txOutputAddress : object

Properties

Name	Type	Description
address	string	receiving address
satoshis	number | string	receiving amount

txOutputScriptExtened : object

Properties

Name	Type	Description
path	string	BIP32 path
publickey	string | Buffer	scep256k1 publickey from path
satoshis	number | string	amount
[script]	ScriptType	script type related to path

SignOption : object

Properties

Name	Type	Description
[coin]	CoinType	check cointype for each input
[feeRate]	number	calculate optimal transaction fee and replace it
[isRBF]	boolean	make Replace-by-Fee transaction

prepared : object

Properties

Name	Type	Description
commandData	communicationData	data for sending to device
rawTx	string	unsigned raw transaction

TransactionObject : object

Properties

Name	Type	Description
rawTx	string	unsigned raw transaction
publickeys	Array.<(string|Buffer)>	publickey correspond to each input
[coin]	CoinType

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