Questions tagged [bitcoinj]

A Java library for processing Bitcoin, stores blockchain headers only

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Fail to sign the Segwit Transaction's input in bitcoinj

I want to spend from a segwit address and it has a P2WPH script, I created this transaction just like creating a normal P2PKH transaction, but just changed the address of the input to the segwit ...
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1answer
37 views

Error message still returned after transaction was indeed broadcast

I use bitcoinj to create the following method to broadcast a raw transacion in testnet, and I did see on bitcoin explorer that it has been broadcast. But even the transaction has been already ...
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1answer
30 views

BITCOINJ: how to make my wallet aware again about change of my transaction status after my server restart?

Using bitcoinj, my server created a transaction and it was broadcasted on the blockchain. I can get its history using: walletAppKit.wallet().getTransaction(txHash) It is in Pending state. Then I ...
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1answer
54 views

spend from p2sh with bitcoinj

i am try to spend the coins on a p2sh first, i generate p2sh and send coins to that p2sh ECKey clientKey = new ECKey(); ECKey serverKey = new ECKey(); ECKey thirdPartyKey = new ECKey(); List<...
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97 views

How to communicate with Bitcoin core 0.17 using bitcoinj for hd wallet creation?

Hi am building one hobby project and i want to perform some operations in my own bitcoin core 0.17 by using bitcoinj lib. so is there any way by which we can use bitcoin-core 0.17,bitcoinj for hd ...
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59 views

Create P2SH address is not same as address saved on rpc node

I have a private key and trying to create P2SH address on testnet like my node created but they're not same. Please help me a bit, thanks so much. PrivateKey: ...
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46 views

Importing the keys Issue

I imported the private keys into my wallet and they appear to be added: This is the result when i run getImportedKeys(): [ECKey{pub HEX=...
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191 views

How can I generate public address from an xpub key in Java?

I have an xpub key with which I want to generate all addresses which have been used or will be used and then find out the keys which have balance. Here's a sample xpubkey with balance- ...
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2answers
225 views

how to get the sender's address in bitcoinj

I'm trying to modify the simple wallettemplate to get the sender's address in the transaction list. However since TransactionInput.getFromAddress() doesn't exist now and getConnectedOutput()....
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1answer
53 views

When downloading the blockchain my application is become unusable, is there an issue with my code or am I using the BitcoinJ library incorrectly?

I am building a Bitcoin wallet with the BitcoinJ Library, after looking at the example of fetching a transaction that they have shown on their github it shows that you need to download the blockchain ...
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1answer
129 views

Change derive path

I've used bitcoinj wallet and used derive path as below. public static final ImmutableList<ChildNumber> ACCOUNT_ZERO_PATH = ImmutableList.of(ChildNumber.ZERO_HARDENED); But I made changes in ...
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1answer
228 views

Issue with the BitcoinJ for Litecoin. Which dependency can be used for Litecoin?

I've created a crypto-currency wallet for Bitcoin using BitcoinJ. Now I want to add Litecoin in this wallet. How to implement BitcoinJ dependency for Litecoin? While using BitcoinJ for both Litecoin ...
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1answer
432 views

Does exist some library for decode/encode raw transaction?

I want to parse raw transaction into JSON then change some values and encode back to hex. JSON like this: { "addresses": [ "346vcZZ6QV4nr68fybMEuA7qxxQeyKWoPS" ], "block_height": -1, "...
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1answer
158 views

Sign Bitcoin transaction with several inputs using bitcoinj. Broadcasting of transaction failed

Good day! I'm working with low level API to make tx and sign it offline. But after all preparations I try to broadcast it and than i get an error from network: 16: mandatory-script-verify-flag-...
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1answer
149 views

Restore from 24 words seed

I have used bitcoinj for createting wallet. I made some changes and try to generate 24 words seed instead of 12 words seed. When I try to restore from 24 words seed, at that time I am using 3 method ...
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1answer
147 views

connect watching wallet with blockchain

i have created watch wallet Wallet wallet = Wallet.fromWatchingKeyB58(params, tPub, DeterministicHierarchy.BIP32_STANDARDISATION_TIME_SECS); How can i link this with block chain i am using ...
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1answer
576 views

BitcoinJ : Balance and Transaction are not showing in wallet after restoring wallet from MnemonicCode

I have created a wallet with the help of WalletAppKit on Android and did some transaction in it. Now what I try to do is, restoring that wallet from mnemonic code (BIP39). It also returns the Wallet ...
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2answers
419 views

Transaction history with bitcoinj

I am new to bitcoinj. I want to print out the list of transactions like as follow for a wallet: 1- Sent 1 BTC to Adress1 on 'A' Time 2- Received 5 BTC from Adress2 on 'B' time 3- Sent 2 BTC to ...
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1answer
609 views

How can i switch from BIP32 to BIP44 using bitcoinj

i am working on a wallet that is using BIP32 for creating Accounts, addresses, xpub, public keys, transaction and etc. but now i want to switch from BIP32 to BIP 44. how can i do this using bitcoinj i ...
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1answer
153 views

how to convert URI into Bip21

i am trying to convert the URI into BIP21 currently i am generating URI from bitcoinj library, but i want it to be on BIP21 Standard. i have read many articles but didn't found any solution
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55 views

How it is possible to wrap with BitcoinJ a Bitcoin Core RPC interface and drives regtest mode

Despite the fact that I have already create an address in regtest network which has Bitcoins I can not import correctly this address to my BitcoinJ app in order to execute certain functions(OP_CODE tx,...
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1answer
450 views

Java: bitcoinj; how to download a full block?

I would like to download a full block using Java and bitcoinj and then parse it to an array to be able to work with it. Here is some (very basic) pseudocode: connect to network; download ...
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1answer
298 views

Getting Hash160 of bitcoin address

How to get hash160 address in string using bitcoinj ,I tried the following code NetworkParameters params = TestNet3Params.get(); String ads = "n1XZMMm3ikh97Mr8JVnnahfugad2DRcVrB"; Address address = ...
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2answers
452 views

How to get unspent bitcoins using bitcoinj

I'm trying to get unspent transaction using bitcoinj like here without using api calls. How can I do this?
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108 views

blockChainDownloadLocked ignoring the duplicate request error

I work with a bitcoin wallet app using the Java/BitcoinJ. The app has custom features such as showing balance, transactions, address and sending option. It was running fine and suddenly, I get the ...
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37 views

Java bitcoinj: ECKey hashCode() and equals() overrides inconsistent

In my recent endeavor to learn Scala, reading the Scala book by Martin Odersky et al. I remember being struck by the emphasis placed by the authors on the difficulty of properly overriding the equals ...
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31 views

End of Mining intention [duplicate]

If every block generated all 10 Minutes to validate a transaction, and the last bitcoin will generated in 2140. And there is no limitation of blocks.. Whats after 2140, because all miner have no ...
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262 views

Bitcoin multisig tutorial

I have five private keys (of type java.math.BigInteger) called a, b, c, d, e. Please provide some code template for the following. Create an address that has "3-out-of-5" spendability for the above ...
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148 views

Extract all public keys from blockchain [duplicate]

I want to extract all public keys from the blockchain. Those will probably mostly be keys that have been used to sign transactions. How would I do this?
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1answer
45 views

How can I create the input of raw transaction through the previous UTXO hash and the unspent index in bitcoinj?

I want to create a raw transaction’s input and output, and sign it then broadcast to testnet. Now I know how to create the output, but I want to refer the transaction that I can input the UTXO hash ...
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1answer
136 views

Transaction not broadcasting on peer network(Blockchain)

I am using Bitcoinj and doing the transaction and I am getting the TX hash but the hash is not showing in any explorer site SendRequest finalReq = SendRequest.to(toAddress, Coin.parseCoin(ammount)....
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1answer
181 views

How can I mine bitcoin faster? [closed]

I'm curios what kind of PC, I need to mine bitcoins. What OS system, what GPU, CPU, etc... my current specification are: CPU: Xeon e3-1230v3 GPU: GTX 780 RAM: 24gb OS: Windows 8.1(64bits) So what ...

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