bitcoinj | BitcoinJ : Samourai Wallet and Sentinel | Blockchain library
kandi X-RAY | bitcoinj Summary
kandi X-RAY | bitcoinj Summary
The bitcoinj library is a Java implementation of the Bitcoin protocol, which allows it to maintain a wallet and send/receive transactions without needing a local copy of Bitcoin Core. It comes with full documentation and some example apps showing how to use it.
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Top functions reviewed by kandi - BETA
- Connects to a block
- Returns the flags indicating whether the script validation tests should be applied to the given transaction
- Get the number of P2SH Sig ops in a script
- Receive a message from the channel
- Receives an initiate message
- Receive a refund
- Reorganize the block
- Queue onReborganize listeners
- Called when a block is seen
- Reads the actual data from an input stream
- Receive messages from the buffer
- Closes this channel
- Puts the undoable block
- Initialize the vstore
- Reads the binary data from the input stream
- Parse the alert message
- Process a message
- Returns an undoable block for the given hash
- Checks to see if there is any pending outputs
- Actually initiate a transaction
- Retrieves the undoable block associated with the given hash
- Dumps the size of the database to standard out
- Find the open transaction outputs for the given addresses
- Closes the channel
- Checks to see if this block is a difficulty transition point
- Verifies a payment request
bitcoinj Key Features
bitcoinj Examples and Code Snippets
Community Discussions
Trending Discussions on bitcoinj
QUESTION
I want to programmatically detect whenever someone sends Bitcoin to some address. This happens on a local testnet which I start using this docker-compose.yml file.
Once the local testnet runs, I create a new address using
...ANSWER
Answered 2021-Nov-18 at 19:39I haven't tested your full setup with electrumx and the ethereum stuff present in your docker-compose file, but regarding your problem, the following steps worked properly, and I think it will do as well in your complete setup.
I ran with docker a bitcoin node based in the ulamlabs/bitcoind-custom-regtest:latest image you provided:
QUESTION
I used -13 as private key in bitcoin but the private key is not valid. How can I get the positive private key from -13 or any other negative numbers using Bitcoinj or java and generate the same address?
...ANSWER
Answered 2021-Sep-15 at 09:51b.mod(new BigInteger("115792089237316195423570985008687907852837564279074904382605163141518161494337"))
QUESTION
I have a small script basically taken from this test script in bitcoinjs-lib
...ANSWER
Answered 2021-May-26 at 18:10looking over https://github.com/iancoleman/bip39 I found I had to specify the correct ravencoin network specifications (don't really understand what this object means) but once I did, it worked perfectly.
QUESTION
My Android app is not syncing to the blockchain, but when I used the bitcoinj libarary on my PC it worked fine.
Note: Both programs start with walletAppKit.setBlockingStartup(false).startAsync().awaitRunning() when the kit is complete and the app calls this on the onCreate method and has sufficient permissions such as read/write and internet. The test device is also physical and not an emulator.
I logged both programs using
ANSWER
Answered 2021-Mar-31 at 14:01Use the kotlin bitcoin kit provided by horizontal systems on github. Use implementation 'com.github.horizontalsystems:bitcoin-kit-android:694d681f3e' in your gradle module and in your project module add mavenCentral()in the buildscript branch:
buildscript {
repositories {
other stuff
mavenCentral()
}
dependencies {
}
}
Then in the allprojects brackets place maven { url 'https://www.jitpack.io' } in the repositories brackets:
allprojects{
repositories{
*other stuff*
maven { url 'https://www.jitpack.io' }
}
}
QUESTION
I'm working on an application involving cryptocurrency, and I'm having trouble with handling the conversion of some of the data involved.
I'm using bitcoinjs-lib to generate Bitcoin addresses. The addresses are created successfully, and my response object looks like the following:
...ANSWER
Answered 2021-Mar-16 at 01:38This is not UTF-8 encoded text, but just binary data. So you can forget about the linked Q/A, you are not in the same situation.
Here it's all your choice as to how you'll encode it, some will prefer to convert it to an hex-dump
QUESTION
ANSWER
Answered 2020-Dec-26 at 01:13Variable UtxoId is part of the request-promise block.
Try:
QUESTION
I am using this BIP32 implementation to derive keys. How can I export the derived public keys in Base64?
...ANSWER
Answered 2020-Nov-24 at 18:54junderw on Github answered this:
publicKey is a Buffer.
publicKey.toString('hex') will turn it into a hex string.
Similarly, for Base64, 'base64' can be used.
QUESTION
I am using bitcoinjs-lib for bitcoin key pair generation.
I got enough examples to generate legacy address and segwit address from the public key, but for bech32 address I could not found anything.
P2PKH which begin with the number 1,
eg: 1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2.
P2SH type starting with the number
3, eg: 3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy.
Bech32 type starting with bc1,
eg: bc1qar0srrr7xfkvy5l643lydnw9re59gtzzwf5mdq.
Thank you for the help.
...ANSWER
Answered 2020-Sep-02 at 17:08It's filed as BIP 0173. You can find documentation about it in the Bitcoin Wiki. Wiki BIP0173
QUESTION
I have used requests in python to get a temporary email box. I need to parse the mail id from the below HTML code(it's beside the "result:"). I have tried using the parse module of python but it is not giving the valid result, instead, I get None as a result. Is there a way to parse from HTML using the left and the right matching strings?
Here is my code>
...ANSWER
Answered 2020-Apr-17 at 05:08I don't know the parse module but I don't see how it can beat regular expressions. You could use an HTML parser to find the script tag, but really just a regex search against the entire html text seems reasonable in this case.
Your data is embedded in a larger list but I recommend keeping the regex search narrow. You have to balance a false positive "mail_id":"507627420" match against the much more likely differences in the list from message to message. So,
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