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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17 views

Bitcoin Transaction Generation: Signature Verification Error

I have the following raw transaction (basic P2PKH) which I am trying to send to the Bitcoin Testnet 3: ...
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1answer
29 views

Including transactions in a block - rules and time / technical aspect

I’ve a question regarding block and transactions included in the next block that is solved. Let us assume theoretically that there is newly propagated solved block. And now there are: tx0 and tx1 –...
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19 views

Missing Bitcoin in Bitcoin Core-Qt after -Zapwallettxes [duplicate]

I had posted a similar question, but wanted to remake as I figured out some things that are not the issue. I used the -zapwallettxes command to allow me to resend a transaction with a higher fee. ...
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34 views

Create a 2-of-3 multisig raw transaction

I would like to create a Bitcoin transaction with a single input and a single 2-of-3 multisig output that pays 1 BTC to any 2 of the following 3 keys: ...
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32 views

Missing btc after -zapwallettxes and blockchain rescan

I sent a transaction in Bitcoin Core and realized that the fee was too low. I waited a few days to see if it would confirm and then wanted to try something else. I read that starting bitcoin core with ...
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1answer
28 views

Does bitcoin qt need to synch before I can spend my change?

Sorry for the follow up question... i was trying to transfer my btc to a new wallet (believing the original one had been compromised). I sent 2 tiny test transfers of $1 then when they arrived in the ...
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32 views

How public-key cryptography secures bitcoin transactions from 51% attacks and Mining Attacks

I wanted to better understand how public-key cryptography avoids 51% attacks and mining attacks, also if this question is wrong please correct so that i can improve my research and provide me with ...
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66 views

How to find out if LND opening pending channels has a confirmation onchain?

After typing lncli pendingchannels I get a channel_point number, and when I put channel_point txid to check if it was confirmed onchain by typing: bitcoin-cli gettransaction "txid insert" I get an ...
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35 views

What makes Bitcoin transaction secure against attackers/hackers?

Wanted to know what is it that makes bitcoin transaction secure and make it less vulnerable to attackers and hackers
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296 views

To what extent does asymmetric cryptography secure bitcoin transactions?

Is there a specific attack or bug which asymmetric cryptography prevents during bitcoin transactions?
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1answer
28 views

Viewing truly raw but decoded transaction data

I've previously been using bitcoin-cli decoderawtransaction to get human readable bitcoin transaction data but am just learning that it's not only decoding the raw transaction but also adding extra ...
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49 views

Why is the field 'hash' necessary in a bitcoin transaction?

Using bitcoin-cli decoderawtransaction I see results like... { "txid": "d2183b3ea763f41a30ec5ba6fbf6e5f32e0ca6a5e8761249c533fe22190f71f1", "hash": "...
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1answer
56 views

How has the Bitcoin average block size recently risen above 3 MB?

I was aware that the block size could rise above the 1 MB cap due to SegWit. However, my understanding was that the block size would still be limited under SegWit. My understanding of SegWit is that ...
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32 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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27 views

P2WPKH - which private key is used to generate signature?

I am looking at the BIP143 P2WPKH example. I am kind of following until the generation of the sigHash: c37af31116d1b27caf68aae9e3ac82f1477929014d5b917657d0eb49478cb670 but then that is used to ...
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2answers
24 views

How can bitcoin transactions for the same coin belong in different blocks?

Isn't each transaction dependent on a hash of the previous transaction? Wouldn't that mean all of the transactions for a particular coin would have to be grouped in the same block? As far I can tell ...
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1answer
39 views

How do I extract the address from a scriptPubKey?

I am creating a block parser and just learned about Scripts in Bitcoin yesterday which is kind of confusing so far. I want to extract the addresses involved in each transaction. Right now, I am able ...
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1answer
42 views

Create a transaction from a wallet coins (UTXOs) with the bcoin library

I have a multisig setup where the signing is done through external HSM's. I am using Bcoin and its wallet to receive funds. What I am trying to do is to create a transaction and sign it with the HSMs. ...
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1answer
32 views

How can I find out who sent me bitcoins?

I had a very unusual situation. I received the bitcoins in my wallet, how can I find out who sent them? Maybe it was the Creator of bitcoin ? :)
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73 views

Bitcoins and transactions missing

I had a wallet which had approx $660 worth of bitcoin somewhere around 0.05 BTC and all of a sudden it has vanished and my transaction tab shows nothing. I have put my receiving address into the ...
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1answer
34 views

What does is mean to have input from multiple wallet addresses?

I've trying to parse some data from the blockchain as provided by blockchain.info My question is about transactions that have multiple inputs like this one: https://www.blockchain.com/btc/tx/...
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1answer
55 views

QR to pay more than one address?

I know that I can generate syntax for a payment qr code like so: bitcoin:xxxaddressxxx?lable=reason&amount=0.051 this pays (to) 1 address! I however, would like to know if I can scan a QR that ...
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1answer
27 views

Bitcoin transactions between two parties

Lets say bitcoin become a global currency which replace fiat money.. If someone (physically )is asking for bitcoins and its urgent and i don't have phone to access the network and the one whos asking ...
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1answer
54 views

Two transactions are signed by different private keys, and the value of “R” for these two transactions is the same?

Everyone knows an error in the Blockchain when the same value of "R" can be calculated and find out the private key of the transaction: ECDSA Signature and the "z" value But I have a ...
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Is there a way to take back my transaction? [duplicate]

I've made a transaction from blockchain to bitcoinwallet.com Apparently bitcoinwallet is a scam? I made a transaction but can't see the cash inside my wallet.
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1answer
49 views

How to make a transaction with locktime on testnet?

I tried to make transaction with nLocktime on bitcoin testnet. I am not able to broadcast it. Can someone please help me to make a basic transaction with 1 input and 1 output, so that I can broadcast ...
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1answer
25 views

Completing a bitcoin transaction

I sent bitcoin to a company address for investment . Transaction was confirmed. The output to the company address indicates that it has been spent. However, the output to the other address shows ...
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1answer
81 views

Finding a transaction in the blockchain [duplicate]

I wanna understand how can a user find a certain transaction he created on the blockchain without him knowing on which block it belongs ? does he have to go over all the blocks using bloom filters to ...
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2answers
96 views

Are there valid transactions which are impossible to mine?

Is it possible to have a bitcoin transaction T that is valid with a very generous transaction fee for which it is impossible for T to be included in the next block, or even in all subsequent blocks? ...
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1answer
41 views

ScriptSig does not validate with seemingly valid signature

I am trying to build raw transactions from scratch to improve my understanding. For comparison I am using the hexoutput from https://coinb.in/ as I can choose Testnet on there. I am trying to ...
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35 views

My unspent bitcoin is not in my wallet

I have a receive transaction that has processed and appears in blockchain. It appears as a unspent transaction. My problem is when while the transaction was processing my wallet began reloading the ...
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1answer
70 views

Chicken and Egg confusion over Bitcoin generation

If Bitcoin is rewarded through mining, and mining is the process of packing some transactions in a block(and adding that block successfully to the blockchain), and on the other hand, a transaction ...
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2answers
44 views

How to search for TXs using only the PublicKey linked to those TXs?

The quest is to define a method for searching TXs on the Bitcoin blockchain using only a PublicKey in HEX format - as opposed to searching TXs by popular terms like wallet ID, txid, hash, etc. I ...
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48 views

Find sender's public key in SegWit Transaction

How can I retrieve the sender's public key in a Segwit transaction? For example: https://www.blockchain.com/btc/tx/3179d18d6f36fa77b88909496535485d8188d96b79d295843789a9e0ff6c3e6a I can happily ...
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1answer
37 views

How exactly do transactions work?

When I search for transaction in bitcoin I am able to find explanations which tell me that there are e.g. two persons A and B and A wants to tranfer a number of bitcoin to B. Imagine A wants to pay 2 ...
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1answer
49 views

How does Bitcoin makes sure that nobody can duplicate a transaction?

I understand that when creating a transaction, you send in data, the hash of that data, and a signature that is created using the hash of the data and your private key. However, what is stopping ...
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2answers
120 views

Missing transaction

I made a transfer on 6/16 from one wallet to another. Despite verification on blockchain.com, the coin is gone from the sending wallet yet never arrived in the receiving wallet. The receiving wallet ...
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68 views

demonstrate tracking some bitcoin transactions with a program like an explorer

Recently I started to read BITCOIN protocol and it's events when a transaction created. I want to create a program a bitcoin explorer. as you know probably, Each non-coinbase input spends an outpoint ...
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2answers
49 views

Transaction fee of 8.44 mBTC for 1.22 mBTC?

I made a transaction of 1.22242 mBTC with the electrum client and, I don't know why, it looks like it transferred all the remaining BTC from my account to myself which made a 13063 bytes transaction ...
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2answers
39 views

How to get latest 50 transactions for a BCH address?

Is there an API from where I can get latest received transactions for a bitcoin-cash address?
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26 views

Extract input addresses from a tx message in bitcoin protocol

Recently, I wrote a c++ code to extract some information from some messages in BITCOIN protocol. for example, I extracted bitcoin value and output address corresponded to it from tx messages of this ...
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1answer
105 views

Bitcoin script execution unsuccessful

I'm working my way through "Mastering Bitcoin". The author made a transaction: 0627052b6f28912f2703066a912ea577f2ce4da4caa5a5fbd8a57286c345c2f2 https://www.blockchain.com/btc/tx/...
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1answer
35 views

Is a bitcoin UTXO divisible?

In this video Andreas Antonopolous says an output is indivisible and therefore if a transaction smaller than the output is done, the rest is used as change and returned to your different address of ...
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1answer
41 views

How to manually sign a transaction with multiple inputs and multiple outputs?

I'm developing transaction constructor, but i faced several problems. To some of which i found answer in How to sign a transaction with multiple inputs?, for the rest i'll try to explain: When we ...
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1answer
44 views

What is transaction “finality”?

bitcoind IsFinalTx() as seen here checks the properties of a transaction in this order: Is nLockTime exactly 0? That's final. return. If it's not 0, is it below the current block height / time? If so,...
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1answer
27 views

Why a specific bitcoin value of a tx message appears in source IP address and then comes to same IP address as the destination address?

Sometime back, I created two wallets on two distinct cellphones. I sent a specific bitcoin value (A bitcoin) from one cellphone to another one. During this process, I captured the entire traffic. ...
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27 views

why a specific transaction value and it's output address which is sent from a specific IP address, returns from another address to that IP address? [duplicate]

I wrote a code to extract bitcoin output addresses and their values from TX messages of the bitcoin protocol. to test it, I prepare this scenario: first I send a specific bitcoin value(for example A ...
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1answer
88 views

Is there a flag or specific message in a bitcoin pcap to show us our bitcoin transaction is confirmed or not?

Assume that I send a specific value from a source wallet to a destination wallet and simultaneously capture the input and output traffic with Wireshark. I can extract output address and it's value ...
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286 views

cant send btc, Uneconomical UTXO requested

Im trying to send btc worth of 2$ and i keep getting message "Uneconomical UTXO requested [type: 1 (limit 46629), txOut.val: 38546, required: 83847]" i even tried sending 1$ but its still the same can ...
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2answers
25 views

Where are the non-scriptPubKey outputs in the chainstate leveldb?

I read https://bitcoindev.network/understanding-the-data/ and it explain that the leveldb of the chainstate contain transaction with at least one unspent output. And it has "The scriptPubKey and ...