Questions tagged [transactions]

This tag should be used for questions related to transactions. Transactions are signed messages regarding the transfer or generation of bitcoins. They are broadcast throughout the Bitcoin network and, if accepted, integrated in the blockchain.

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How many bitcoin transactions can be verified per second on commodity hardware in 2020?

I am trying to figure out how many Bitcoin transactions could be verified per second. Am I correct that signature verification is more expensive than computing Merkletrees and hashes and therefore ...
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4 votes
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108 views

Clients without Isstandard() function

Are there any bitcoin clients without the Isstandard () function which would allow non standard transactions to be broadcast?
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  • 333
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1 answer
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Building Signed Bitcoin Transaction in Java

I have been attempting to build my own raw transaction generator in Java which I can then broadcast on the testnet network. The problem is when I attempt to broadcast the transaction it says there is ...
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4 votes
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398 views

How to explore transaction chain via Original Bitcoin API as blockexplorer does it

Is there any possibility to explore transaction chain via Original Bitcoin API (https://en.bitcoin.it/wiki/Original_Bitcoin_client/API_Calls_list) as the blockexplorer does it. If not, why?
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What are the malleability threat vectors when passing PSBTs to other actors?

If I am passing a PSBT (Partially Signed Bitcoin Transaction) between multiple people, and I pass on my signature for my UTXOs for given inputs, can someone take advantage of malleability and cheat me ...
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3 votes
2 answers
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In Electrum, how does one watch/poll a wallet for an incoming payments to a certain address via API?

I want to create a simple way to accepting bitcoins on my own, using Electrum. I don't except big volume. I suppose, I'd have at most a handful of incoming payments in the beginning. That is, I ...
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3 votes
1 answer
5k views

manually signing bitcoin transaction

I'm trying to create a BTC transaction with one input and two outputs, one for change and one OP_RETURN to anchor data. And I'm doing all of that on my regtest backend. The raw unsigned transaction is ...
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3 votes
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1k views

How to directly query leveldb database to get get a record by transaction hash or by sender's address?

I learned that the blocks and transactions are stored locally in .bitcoin/blocks/index and .bitcoin/chainstate databases, respectively. I want to make a direct query to those databases to measure the ...
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3 votes
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4k views

Electrum transaction still says unconfirmed parent

A transaction from Electrum is still showing unconfirmed parent even though the previous transaction in the chain has completed. Electrum has shown this for 24 hours now. I realize that my fee is ...
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3 votes
0 answers
94 views

Whisper Implementation in Bitcoin

Is there some kind of implementation in bitcoin to communicate between nodes, which is similar to the Whisper Communication in Ethereum ? Whisper, is a communication protocol for DApps to communicate ...
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Cannot obtain a lock - Already deleted lock file

I am trying to open Bitcoin Core of "Cannot obtain a lock on C:User/App..." I deleted the lock. file like previously suggested but cannot find a solution after that! If I reinstall will I loose the ...
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How to ignore balance check to cancel unconfirmed transaction (double spending)

I need to cancel a transaction that was sent without fee (using Blockchain.info). It is currently "Unconfirmed". The only way I have found is to do a double spend of the whole wallet, specifying a ...
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3 votes
3 answers
1k views

Get transaction that spent a transaction id

The blockchain.info API allows for querying information about a particular Transaction by its ID. But if you want to follow the coins to the next transaction, I'm not seeing what the next query should ...
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2 votes
0 answers
21 views

Calculation of different Pubkeys in Lightning according to BOLT03

Lightning uses different Pubkeys to gain more privacy and security, I am not sure how they are calculated. In BOLT03 it says: The corresponding private keys can be similarly derived, if the basepoint ...
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How to calculate the Hashes in Lightning

I was wondering how I calculate the hashes regarding BOLT03 Specification: The Revocation Pubkey is calculated like this: revocationpubkey = revocation_basepoint * SHA256(revocation_basepoint || ...
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When did Bitcoin start to allow more than 2 transaction outputs?

The original Bitcoin paper specifies that: Combining and Splitting Value (...) Normally there will be either a single input from a larger previous transaction or multiple inputs combining smaller ...
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2 votes
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Sending a transaction from a Trezor One with outdated firmware and lost recovery seed

I have a Trezor One with firmware 1.4.2 and I have lost the recovery seed. I'd like to send a transaction from the device to another address that I control. However, because of its outdated firmware, ...
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2 votes
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40 views

Sign transaction externally

I create a transaction with inputs from a given address / public key without signatures. Every input needs to be signed. I use a different method to generate the signatures so I can't provide a ...
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2 votes
2 answers
259 views

How to exchange small amount of bitcoin?

Hi I have a little question could you tell which is the best method to exchange 2.27mBTC (18€) in euros or USD? I registered on coinmama but the minimum for them is 50€ is there any other exchange ...
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Address final balance is 0 after receiving 0.003 BTC

I generated a new BTC address (address A). I tried to send 0.003 BTC to address A. After sending them from my coinnomi wallet, the balance of address A remains 0 and from output seems that 0.003 BTC ...
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2 votes
1 answer
208 views

Step by Step to Connect to ElectrumX via Nodejs

I am developing a simple app that will need to retrieve BTC wallet Address Balance and relative transactions Initially I thought to use some existing APIs (btc.com, blockchain.com etc.), but the ...
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0 answers
232 views

Getting Error "Unable to sign input, invalid stack size (possibly missing key)"

I have created a key from using coinstring, and then imported it into my wallet. Then I ran: bitcoin-cli signrawtransactionwithkey "$rawtxhex" "[\"$mykey$\"]" But it results in: Unable to sign ...
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265 views

How to send & receive bitcoin using bitcoinjs-lib?

First I create HD Wallet using BIP32 using mnemonics. Now I want to generate new child addresses with private key using xpub & xpriv for every receive. Then for example, I received BTC in 2 ...
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2 votes
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41 views

Script and DER in P2PKH

Im trying to figure out the script and DER In P2PKH, the "first part (scriptsig)" push in stack (<sig><pubK>) because is it DER? Instead the "second part (scriptPubKey)" you can map the ...
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2 votes
0 answers
302 views

Broadcasting signed transaction from Watching wallet using bitcoinj

I am working with watching wallet and Offline wallet using bitcoinj, I created Watching Wallet using tpub key of Offline Wallet I am receiving payment on watching wallet Fine, now I want to ...
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  • 548
2 votes
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434 views

Abandon Transaction or Increase fee

I'm using Bitcoin core v0.15.1 and I am trying to send my BTC to coinbase. I have waited over 72 hours since initiating a transaction and when I right click the "abandon transaction" and "Increase fee"...
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2 votes
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902 views

How is the transaction fee for sending bitcoins using Electrum wallet calculated ?

I am trying to understand how is the fee for transaction calculated for desktop wallets like electrum.
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2 votes
0 answers
89 views

How do you apply “-zapwallettxes” for multbit 0.5.15

I made a transaction a few months ago but the transaction is still not confirmed, the Bitcoins are debited from my account and the balance in my wallet is zero. Information on the transaction The ...
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  • 21
2 votes
0 answers
85 views

Is a replay-attack-proof soft fork possible?

Say there is a soft-fork. A is the chain that implements it, B is the chain that has a transaction that's valid pre-soft-fork, but invalid post-soft-fork, so it's following the old rules. We know that ...
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2 votes
1 answer
296 views

Manually checking for credited bitcoins

If I have the bitcoin address, the private key and a transaction ID from Bitcoin (regtest mode) in shell variables, what Python code do I need to run to claim the Bitcoins are indeed intended for this ...
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2 votes
0 answers
60 views

Banned bitcoinj node ip

I've created many raw transactions today and after an hour I found out that my bitcoin node is only connected to 3 peers (testnet). Is it possible that my node has been banned due to wrong or double ...
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2 votes
0 answers
48 views

What bitcoin clients provide GUI support for "BIP 125 Opt-in Full Replace-by-Fee Signaling"?

What bitcoin clients provide GUI support for "BIP 125 Opt-in Full Replace-by-Fee Signaling"? If there are no GUI bitcoin clients that support it are there supported command line bitcoin clients?
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Specific fee in transaction

Is there any possible way to send transaction with specific fee (not fee per kb) from wallet in bitcoinj? Where should I look to find a solution :)? My code: Address address = Address.fromBase58(...
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2 votes
0 answers
265 views

I need to send a message to the person resposible for a specific wallet

Using Multibit, we sent btc to an incorrect wallet address. We have sent a small amount of BTC to this address before, so it is listed in our wallet's Transaction list, but is unfortunately not ...
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2 votes
0 answers
428 views

Bitcoin sending transaction error

I recently bought some Bitcoins(around 0.5) and sent some to a friend. He got them direct. Today I wanted to transfer some more but it didn't work. Every transaction was an error, besides one very ...
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2 votes
0 answers
407 views

Creation of <20-byte hash of redeem Script> in a P2SH Transaction

According to this example: Redeem Script: 2 PubKey1 PubKey2 PubKey3 PubKey4 PubKey5 5 OP_CHECKMULTISIG Locking Script: OP_HASH160 <20-byte hash of redeem script> OP_EQUAL Unlocking Script: Sig1 ...
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  • 361
2 votes
0 answers
120 views

Include Bitcoin-Transaction within database-Transaction

I am writing a system that uses the Bitcoin Core JSON-RPC API. Use case: user wants to withdraw some BTC to his BTC address. My application handles this request by the following logic: Check if ...
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  • 121
2 votes
1 answer
663 views

How to sign a transaction using BitcoinJ

I am having problem signing the transaction using BitcoinJ library without the Wallet instance, I only have the Transaction class instance and the ECKey in order to sign the transaction. Is there a ...
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2 votes
0 answers
604 views

Coinbase lost my transaction from Bitstamp

I'm moving my coins out of Bitstamp I was looking for another exchange. I have sent 0.00007 BTC to just test the transaction. I got the address where I want to send coins to from coinbase.com/...
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2 votes
0 answers
132 views

Need to do 400 transactions, how do I get them confirmed?

I tried to send 0.00000001 btc to about 7 addresses, and paid the 0.0001 fee. But it seems like this transaction won't go through ever. Those coins are lost :(. I have about 400 sponsors, and they ...
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2 votes
0 answers
451 views

CoinBase Callback URL in Java

I using CoinBase API for transactions in a game. I assign a callback URL with the address so as to get instant notification on payment transactions. the URL is called but it is not sending any data. ...
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2 votes
0 answers
746 views

Missing transactions with blockchain.info

All of the quick send transfers I've made on blockchain.info do not show up in my blockchain.info history. Furthermore, a person I have made a few quick send transaction with is claiming 0 ...
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2 votes
1 answer
961 views

What is the required input for python-bitcoinlib getrawtransaction command?

I am running a bitcoin node on my machine, fully synced with RPC commands enabled, rpc server live and txindex=1. In the command-line I can run the following RPC call and obtain the information ...
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2 votes
1 answer
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Is there any party who is archiving all transactions that have been broadcast?

There is a person claiming that Blockchain.info/wallet sent a transaction but for whatever reason that transaction never got included in a block. If the transaction is valid today but perhaps just ...
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1 vote
0 answers
34 views

Bitcoin listreceivedbyaddress as REST API

I am currently looking for a REST API service which will allow me to implement a super simple deposit system. Currently I am generating bitcoin addresses (mainnet + testnet) via Python. In addition to ...
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1 vote
1 answer
25 views

Order of Signatures in Multisig-Scheme

3 Entities (A/B/C) create a collaborative Multisig Wallet (e.g. 2-of-3). A creates an unsigned TX and shares it with B/C. They (B/C) sign and broadcast. Looking at the TX on the network, can A make ...
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1 vote
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Buy Bitcoin with NBitcoin c# Web App

I have been using the NBitcoin lib with c# to create a Bitcoin wallet app. I have pretty much sorted out the creation of the wallet and everything that this entails. What I need some help with is on ...
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1 vote
1 answer
24 views

Spending UTXO recieved in same transaction

Is it possible to spend UTXOs received in same transaction? Or we need to issue a new transaction for spend those UTXOs?
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1 vote
1 answer
34 views

How many transactions are coin tumblers responsible for?

I see many resources online which explain what coin mixer or tumbler services are and how they work, and why someone would or wouldn't want to use one. But what I'm having trouble finding anywhere, is ...
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1 vote
0 answers
47 views

Implementing a trustless English auction on Bitcoin

Is it possible to implement an English-auction type mechanic on Bitcoin (trustlessly)? I have tried smart contract implementations in other blockchains. For instance, one straight forward ...
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