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wtsnz/SwiftBSV
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A library to help you create Bitcoin transactions in Swift.
The goal is to mimic thehttps://github.com/moneybutton/bsv/ lib as close as possible. I've used multiple existing open source Bitcoin Swift libraries as a starting point. This project is in active development and will continue to change significantly.
Todo:
- BInt (Big Number)
- Base58Check
- Point (Elliptic Curve Points)
- PublicKeys
- PrivateKeys
- Bip39 (Mnemonic)
- Bip32 (HD Wallets)
- TxBuilder
- more...
Add this to your project using Swift Package Manager. In Xcode that is simply: File > Swift Packages > Add Package Dependency... and you're done. Alternative installations options are shown below for legacy projects.
If you are already usingCocoaPods, just add 'SwiftBSV' to yourPodfile then runpod install.
If you are already usingCarthage, just add to yourCartfile:
github "wtsnz/SwiftBSV" ~> 0.1Then runcarthage update to build the framework and drag the builtSwiftBSV.framework into your Xcode project.
letmnemonic=Bip39.create()letseed=Bip39.createSeed(mnemonic: mnemonic)letrootKey=Bip32(seed: seed, network:.mainnet)print(rootKey.address)// 1C8eycEadLHZZfRkchqTC3e72fRNNfbXs3
letmessage="hello!"letprivateKey=PrivateKey()letaddress= privateKey.addressletsigString=BitcoinSignedMessage.sign(message: message, privateKey: privateKey)print(sigString)// H5wZz9N2+O8oHCMfZBE5nbeM6dr2ZwpD6cKhC0q1lPi/A1t9KV5VO0vTL2kRg8Hg7XSmZl1cviZFj4TkfLAGT9E=
letmessage="hello!"letaddress=Address(fromString:"1D7ZaBLeT3FFr1mcKAWorZHdE18kEVvuaY")!letsigString="IOsRLk8/CBpLvOecpV0kh4ajjgpUH04T3kkJRPJng5kMOe3Az0gwGx2n8dHyooGykrqB6SuMCPtahZ5EN/TcZzg="letvalid=BitcoinSignedMessage.verify(message: message, signature: sigString, address: address)print(valid)// true
letprivateKey=PrivateKey(data: wallet.privateKey)letpublicKey= privateKey.publicKeyletaddress= publicKey.addresslettxb=TxBuilder().setFeePerKb(500).setChangeAddress(address)// Add inputs to the transactionvarnumberOfInputs=0forutxoin utxos{lettxHashBuf=Data(Data(hex: utxo.txId).reversed())lettxOut=TransactionOutput( value: utxo.satoshis, lockingScript:Data(hex: utxo.script)) txb.inputFromPubKeyHash( txHashBuffer: txHashBuf, txOutNum: utxo.outputIndex, txOut: txOut, pubKey: publicKey) numberOfInputs= numberOfInputs+1}// Add a data outputvarscript=try!Script().append(.OP_FALSE).append(.OP_RETURN).appendData("hello, world!".data(using:.utf8)!)txb.outputToScript( value:0, script: script)// Add an output to another Address (pay-to-pubkey-hash)letvalue=UInt64(payee.amount*100_000_000)txb.outputToAddress(value: value, address:Address(fromString: payee.to)!)// Build, using all the inputstry! txb.build(useAllInputs:true)// Finally sign the built transactionforinputin0..<numberOfInputs{ txb.signInTx(nIn: input, privateKey: privateKey)}// Do something with the signed transaction!txb.transaction
Will Townsend
SwiftBSV is available under the MIT license. Seethe LICENSE file for more information.
This project is a mashup of a bunch of open source projects, and many original contributions and wouldn't have been possible without the following projects:
About
Bitcoin SV comes to Swift