Bitcoin

getBitcoinSignedTransaction

The DCENT iOS SDK provides functions for signing transaction of coins.

This function is for:

• .BITCOIN - bitcoin (BTC)
• .BITCOIN_SV - bitcoin sv (BSV)
• .BTC_SEGWIT - bitcoin segwit (BTC)
• .MONACOIN - monacoin (MONA)
• .LITECOIN - litecoin (LTC)
• .LTC_SEGWIT - litecoin segwit (LTC)
• .ZCASH - zcash (ZEC)
• .HORIZEN - horizen (ZEN)
• .BITCOINCASH - bitcoin cash (BCH)
• .DOGECOIN - dogecoin (DOGE)
• .BCH_ABC - bitcoin cash abc (BCHA)
• .ECASH - ecash (XEC)
• .DASH - dash (DASH)
• .BITCOIN_GOLD - bitcoin gold (BTG)
• .DIGIBYTE - digibyte (DGB)
• .DGB_SEGWIT - digibyte segwit (DGB)
• .RAVENCOIN - ravencoin (RVN)
• .BTC_TESTNET - bitcoin testnet (BTCt)
• .BTC_SEGWIT_TESTNET - bitcoin segwit testnet (BTCt)
• .MONA_TESTNET - monacoin testnet (MONAt)
• .LITE_TESTNET - litecoin testnet (tLTC)
• .LTC_SEGWIT_TESTNET - litecoin segwit testnet (tLTC)
• .ZCASH_TESTNET - zcash testnet (TAZ)
• .BCH_TESTNET - bitcoin cash testnet (tBCH)
• .DASH_TESTNET - dash testnet (tDASH)
• .BTG_TESTNET - bitcoin gold testnet (tBTG)
• .DIGIBYTE_TESTNET - digibyte testnet (tDGB)
• .DGB_SEGWIT_TESTNET - digibyte segwit testnet (tDGB)
• .RVN_TESTNET - ravencoin testnet (tRVN)

Parameters

• coinType: bitcoin networks coin type
• bitcoinTransaction: (BitcoinTransaction)bitcoin transaction parameter

class BitCoinTransaction

This class to be used for bitcoin transaction.

Name	Type	Description
version	UInt32	version of bitcoin transaction. Currently 1 - BCH /Dash/BTG : 2 - ZCASH : 4
input	UnspentTransactionOutput	previous transaction output information to be used
output	TransactionOutput	coin spending information
locktime	UInt32	locktime for this transaction
optionParam	String	(optional)option parameter for this transaction in case ZCASH

class UnspentTransactionOutput

The class for previous transaction output information to be used for bitcoin network transaction.

Name	Type	Description
prev_tx	String	full of previous transaction data
utxo_idx	UInt32	index of previous transaction output to be sent
type	BtcTxtype	bitcoin transaction type for this UTXO
key	String	BIP44 key path for unlocking UTXO

class TransactionOutput

The class for coin spending information of Bitcoin network Transaction

Name	Type	Description
value	UInt64	amount of coin to spend. Satoshi unit.
to	[String]	if type is p2pkh or p2sh, Base58Check encoded address of the receiver. The value of the field may follow the rule of version prefix.(BITCOIN_BASE58CHECK) if the type is p2pk , Base58Check encoded non-compressed public key without version prefix. if the type is multisig , Base58Check encoded non-compressed public key (without version prefix) list. if the type is change , BIP44 formatted PATH to get change address. In this case, the transaction type is assumed as p2pkh
type	BtcTxtype	bitcoin network transaction type or this field can indicate output as a change

enum BtcTxtype

• p2Pkh: pay to public key hash
• p2Pk: pay to public key
• p2Sh: pay to script hash
• change: indicate output as a change

Returns

• result: (Bool) true if successful, false if error occurred
• txData: signed transaction

Example

let transactionOutput : TransactionOutput = TransactionOutput()
let unspentTransactionOutput : UnspentTransactionOutput = UnspentTransactionOutput()
var unspenttxOut : [UnspentTransactionOutput] = [UnspentTransactionOutput()]
  
unspenttxOut.append(unspentTransactionOutput)
  
let BtcTxData : BitcoinTransaction = BitcoinTransaction(version: 0, input: unspenttxOut, output: [transactionOutput], locktime: 0)
  
// test data
BtcTxData.version = 1
BtcTxData.input[1].prev_tx = "0100000001001355540aa694ddde95548de76168666f33d8fad420fab6c554180846676df1000000006a47304402205089f4b1bdb1f96786f4750af3c16a23c73b60de0fe3cfec0da906a181eea645022078047d56dded692477d35052e9179ac71f79c6ec6b5f49941056c03663255be9012103ac2a317f777d63a6bac857ba07e30920a0f2ebd3f99f15a92b8d295791a971f6ffffffff0230750000000000001976a914848d227771119767a8c08ee0b105633cbff2d6b688ac77180000000000001976a9145dadfc1f7c4548336912f23311b424310d6533c088ac00000000"
BtcTxData.input[1].type = BtcTxtype.p2Pkh
BtcTxData.input[1].utxo_idx = 1
BtcTxData.input[1].key = "m/44'/0'/0'/1/4"
BtcTxData.input[0].prev_tx = "0100000001076524b52baf87fe521e5b8a910fadd91c944f952520677def057e346a96380d000000006a473044022045a30be5dc493c36a3a55fd522b4aa2d795f49bb8b61507e1fca1c15819142c1022010846e11893840e521b277f31c1ca835d352fb582633e5ac95106d0ed52d1654012103b72bcab65c4ea43f4b700220729bdde9638c3bb70cc66b7a0de30738e8241382ffffffff0210270000000000001976a9149189ffd2039f1824de14562e592dc4bccaa57d6e88ac6a290000000000001976a9147046ed0f139552ada485f925e74f6576016fc55e88ac00000000"
BtcTxData.input[0].type = BtcTxtype.p2Pkh
BtcTxData.input[0].utxo_idx = 0
BtcTxData.input[0].key = "m/44'/0'/0'/0/2"
BtcTxData.output[0].to[0] = "1K8EfJgWR16Wo3Ejb3AtMk2mfoeAjmMtDL"
BtcTxData.output[0].type = BtcTxtype.p2Pkh
BtcTxData.output[0].value = 10000
BtcTxData.locktime = 0
  
DcentMgr.getBitcoinSignedTransaction(coinType: .BITCOIN, bitcoinTransaction: BtcTxData){ (result, txData) in
    if result == false {
        print("FAIL !!!")
    }else{
        print(txData)
    }
}