Welcome to BitcoinKit
The BitcoinKit library is a Swift implementation of the Bitcoin protocol which support both BCH and BTC. Improving the mobile ecosystem for Bitcoin developers is our mission.
BitcoinKit allows maintaining a wallet, sending or receiving transactions without a full blockchain node. Following is a wallet app that demonstrates the way to use it.
Release notes are here.
- Encoding/decoding addresses: base58, Cashaddr, P2PKH, P2SH, WIF format.
- Transaction building blocks: inputs, outputs, scripts.
- EC keys and signatures.
- BIP32, BIP44 hierarchical deterministic wallets.
- BIP39 implementation.
- SPV features are under construction. The following functions cannot work well sometimes.
- Send/receive transactions.
- See current balance in a wallet.
// from Testnet Cashaddr let cashaddrTest = try AddressFactory.create("bchtest:pr6m7j9njldwwzlg9v7v53unlr4jkmx6eyvwc0uz5t") // from Mainnet Cashaddr let cashaddrMain = try AddressFactory.create("bitcoincash:qpjdpjrm5zvp2al5u4uzmp36t9m0ll7gd525rss978") // from Base58 format let address = try AddressFactory.create("1AC4gh14wwZPULVPCdxUkgqbtPvC92PQPN")
Creating new wallet
let privateKey = PrivateKey(network: .testnet) // You can choose .mainnet or .testnet let wallet = Wallet(privateKey: privateKey)
Import wallet from WIF
let wallet = try Wallet(wif: "92pMamV6jNyEq9pDpY4f6nBy9KpV2cfJT4L5zDUYiGqyQHJfF1K")
Hierarchical Deterministic Wallet
// Generate mnemonic let mnemonic = try Mnemonic.generate() // Generate seed from the mnemonic let seed = Mnemonic.seed(mnemonic: mnemonic) let wallet = HDWallet(seed: seed, network: .testnet)
let mnemonic = try Mnemonic.generate() let seed = Mnemonic.seed(mnemonic: mnemonic) let privateKey = HDPrivateKey(seed: seed, network: .testnet) // m/0' let m0prv = try! privateKey.derived(at: 0, hardened: true) // m/0'/1 let m01prv = try! m0prv.derived(at: 1) // m/0'/1/2' let m012prv = try! m01prv.derived(at: 2, hardened: true)
HD Wallet Key derivation
let keychain = HDKeychain(seed: seed, network: .mainnet) let privateKey = try! keychain.derivedKey(path: "m/44'/1'/0'/0/0")
let extendedKey = privateKey.extended()
let blockStore = try! SQLiteBlockStore.default() let blockChain = BlockChain(network: .testnet, blockStore: blockStore) let peerGroup = PeerGroup(blockChain: blockChain) let peerGroup.delegate = self let peerGroup.start()
- iOS 9.0+ / Mac OS X 10.11+ / tvOS 9.0+ / watchOS 2.0+
- Xcode 10.0+
- Swift 5.0+
CocoaPods is a dependency manager for Cocoa projects. You can install it with the following command:
$ gem install cocoapods
CocoaPods 1.5.0+ is required to build BitcoinKit.
To integrate BitcoinKit into your Xcode project using CocoaPods, specify it in your
source 'https://github.com/CocoaPods/Specs.git' platform :ios, '10.0' use_frameworks! target '<Your Target Name>' do pod 'BitcoinKit' end
Then, run the following command:
$ pod install
Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.
You can install Carthage with Homebrew using the following command:
$ brew update $ brew install carthage
To integrate BitcoinKit into your Xcode project using Carthage, specify it in your
carthage update to build the framework and drag the built
BitcoinKit.framework into your Xcode project.
Swift Package Manager
BitcoinKit is available through Swift Package Manager. To install it, simply add the following lines to dependencies of your Package.swift:
.package(url: "https://github.com/yenom/BitcoinKit.git", .upToNextMinor(from: "1.0.0"))
Note that following data types and features are currently not supported on Linux platform.
- SQLite based BlockStore
Contributions to BitcoinKit are welcome and encouraged! Feel free to open issues, drop us pull requests.
Authors & Maintainers
BitcoinKit is available under the MIT license. See the LICENSE file for more info.
Thank you to all our backers! 🙏 [Become a backer]
Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [Become a sponsor]
Help us keep the lights on
v1.1.0-rc1 - Sep 21, 2019
⬆️ Swift 5.0
Now we support Swift5.0!
⭐️ New Features
- Plan, Build and Sign a transaction #228
- QRCode support #158
- ECPoint multiplication methods #219
- Mnemonic #227
- HDWallet #228
- Address #232
🐛 Fix bugs
- Key derivation bug #220
- Add merkleblock and proof of work check #170 #153
- Add BlockMessage.computeMerkleRoot() #215
- Using secp256k1 library instead of openssl #218 #203
- Fix typos #179
- Modify README #180 #208 #211
✅ All Merged PRs
All PRs since v1.0.2
v1.1.0-beta5 - Sep 13, 2019
v1.1.0-beta4 - Sep 12, 2019
v1.1.0-beta3 - Sep 27, 2018
- Update properties name and access modifiers of
v1.1.0-beta2 - Sep 21, 2018
- Refactor MockUnlockScriptBuilder