bdk-rn

A React Native version of the Bitcon Development Kit (https://bitcoindevkit.org/)

Table of Contents

• Installation
• Usage
• Library API

Installation

Using npm:

npm i --save git+https://github.com/LtbLightning/bdk-rn.git

Using yarn:

yarn add bdk-rn@https://github.com/LtbLightning/bdk-rn.git

[IOS Only] Install pods:

npx pod-install
or
cd ios && pod install

Usage

import BdkRn from 'bdk-rn';

// ...

await BdkRn.generatemnemomic();

Library API

All methods work in iOS: ✅

All methods work in Android: ✅

All methods return response as follows:

const result = BdkRn.generatemnemomic();
if (result.isErr()) {
    console.error(result.error.message); // "error message"
    return;
}
const mnemonic = result.value;

Following methods can be used with this module. All methods can be called by BdkRn object. Parameters with asterisk(*)** are mandatory.

BdkRn.generateMnemonic()

Method	Request Parameters
generateMnemonic()	{entropy, length}
createExtendedKey()	{network, mnemonic, password}
createXprv()	{network, mnemonic, password}
createDescriptor()	{type, mnemonic, password, network, publicKeys, threshold}
createWallet()	{mnemonic,password,network,blockChainConfigUrl,blockChainSocket5,retry,timeOut,blockChainName,descriptor}
getNewAddress()	-
getBalance()	-
broadcastTx()	{address, amount}
getPendingTransactions()	-
getConfirmedTransactions()	-
getTransactions()	-

generateMnemonic()

Generate random mnemonic seed phrase. Reference: https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki#generating-the-mnemonic This will generate a mnemonic sentence from the english word list. The required entropy can be specified as the entropy parameter and can be in multiples of 32 from 128 to 256, 128 is used as default. A word count or length for can be specified instead as the length parameter and can be in multiples of 3 from 12 to 24. 12 is used as default.

When both entropy and length are specified, entropy is used and length is ignored.

// using default values
const response = await BdkRn.generateMnemonic();
// daring erase travel point pull loud peanut apart attack lobster cross surprise

// Specifying entropy of 192 which is the same as specifying length as 18
const response = await BdkRn.generateMnemonic({ entropy: 192 });
// daring erase travel point pull loud peanut apart attack lobster cross surprise actress dolphin gift journey mystery save

---

createExtendedKey()

This method will create a extendedKeyInfo object using the specified mnemonic seed phrase and password ExtendedKeyInfo creates a key object which encapsulates the mnemonic and adds a private key using the mnemonic and password.

The extended key info object is required to be passed as an argument in some bdk methods.

const key = await BdkRn.createExtendedKey({
  	    network: Network.TESTNET,
	    mnemonic: 'daring erase travel point pull loud peanut apart attack lobster cross surprise',
  	    password: '',
	});

// {
// 		fingerprint: 'ZgUK9QXJRYCwnCtYL',
//		mnemonic: 'daring erase travel point pull loud peanut apart attack lobster cross surprise',
//		xpriv: 'tprv8ZgxMBicQKsPd3G66kPkZEuJZgUK9QXJRYCwnCtYLJjEZmw8xFjCxGoyx533AL83XFcSQeuVmVeJbZai5RTBxDp71Abd2FPSyQumRL79BKw'
// }

---

createXprv()

create xprv using mnemonic phrase and password.

const response = await BdkRn.createXprv({ network: Network.TESTNET, mnemonic: '', password: '' });
// tprv8ZgxMBicQKsPd3G66kPkZEuJZgUK9QXJRYCwnCtYLJjEZmw8xFjCxGoyx533AL83XFcSQeuVmVeJbZai5RTBxDp71Abd2FPSyQumRL79BKw

---

createDescriptor()

Create a variety of descriptors using xprv or mnemonic.

xprv will be used if passed otherwise mnemonic*, network* and password will be used.

type is a string and can be one of WPKH, P2PKH, p2pkh, pkh, SHP2WPKH, shp2wpkh, p2shp2wpkh, MULTI. WPKH is used as default.

If type is MULTI then need to specify the signature threshold and publicKeys array. path is optional, 84'/1'/0'/0/* is used by default

const args = {
  type: '',
  mnemonic: 'tackle pause sort ten task vast candy skill retire upset lend captain',
  password: '',
  path: '',
  network: '',
  publicKeys: [],
  threshold: 4,
  xprv: '',
};
const response = await BdkRn.createDescriptor(args);
// wpkh(tprv8ZgxMBicQKsPd3G66kPkZEuJZgUK9QXJRYCwnCtYLJjEZmw8xFjCxGoyx533AL83XFcSQeuVmVeJbZai5RTBxDp71Abd2FPSyQumRL79BKw/84'/1'/0'/0/*)

---

createWallet()

Initialize wallet, returns new address and current balance.

descriptor will be used if passed otherwise mnemonic*, network* and password will be used.

createWallet with mnemonic

const response = await BdkRn.createWallet({
  mnemonic: 'daring erase travel point pull loud peanut apart attack lobster cross surprise',
  password: '',
  descriptor: '',
  network: '',
  blockChainConfigUrl: '',
  blockChainSocket5: '',
  retry: '',
  timeOut: '',
  blockChainName: '',
});

createWallet with descriptor

const response = await BdkRn.createWallet({
  mnemonic: '',
  descriptor:
    'tprv8ZgxMBicQKsPd3G66kPkZEuJZgUK9QXJRYCwnCtYLJjEZmw8xFjCxGoyx533AL83XFcSQeuVmVeJbZai5RTBxDp71Abd2FPSyQumRL79BKw',
  password: '',
  network: '',
  blockChainConfigUrl: '',
  blockChainSocket5: '',
  retry: '',
  timeOut: '',
  blockChainName: '',
});

---

getNewAddress()

Create new address for wallet.

const response = await BdkRn.getNewAddress();
// tb1qew48u6cfxladqpumcpzl0svdqyvc9h4rqd3dtw

---

getBalance()

Get balance of wallet.

const response = await BdkRn.getBalance();
// 8369

---

broadcastTx()

Used to send sats to given address.

Required params: address, amount

let address: string = 'tb1qhmk3ftsyctxf2st2fwnprwc0gl708f685t0j3t'; // Wallet address
let amount: number = 2000; // amount in satoshis
const response = await BdkRn.broadcastTx({ address, amount });
// 1162badd3d98b97b1c6bb7fc160b7789163c0fcaef99ad841ad8febeb1395864

---

getPendingTransactions()

Get pending transactions

const response = await BdkRn.getPendingTransactions();
// [{ txid: '', sent: 0, received: 0, fee: 0 }]

---

getConfirmedTransactions()

Get confirmed transactions

const response = await BdkRn.getConfirmedTransactions();
// [{ txid: '', block_timestamp: 0, sent: 0, block_height: 0, received: 0, fee: 0 }]

---

getTransactions()

Get all confirmed and pending transactions

const response = await BdkRn.getTransactions();
// { confirmed: [], pending: [] }

---

Note: Caution this is pre-Alpha at this stage Please consider reviewing, experimenting and contributing ⚡️

Thanks for taking a look!