Questions tagged [utxo]

Unspent Transaction Outputs (UTXOs) are created by transactions and allow the owner of an associated address to spend a specific amount.

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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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Is it cryptographically possible to have aggregate signature schemes that can improve privacy in UTXO consolidation?

My understanding of Schnorr signatures, Taproot and Graftroot and how they improve privacy in smart contracts / multi-sig is by allowing users to aggregate signatures so the individual signatures and ...
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How many TXO have been created in total?

I've seen some statistical data about the Bitcoin UTXO number (around 61M currently). I was wondering how many TXOs (including spent and unspent) there were in the complete history of Bitcoin?
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What would UTXO consolidation look like in the public ledger with Schnorr signatures?

I am excited about the privacy and optimisations involved with moving from ECDSA to Schnorr signatures. One of the privacy improvements, as I understand it, is that you can aggregate signatures so ...
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Create an issuance and a send within the same block (XCP)

Using counterparty api I am issuing an asset, signing the raw transaction and sending raw transaction. Api I used is http://counterparty.io/docs/api/#create_issuance As it takes 10 or more minutes to ...
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get utx scriptPubKey to become an object

I'm using this python script https://github.com/sebicas/bitcoin-sniffer When I see a utx I look at each output and find the scriptPubKey I expected to see something like "scriptPubKey": { "asm": ...
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614 views

Mempool tracking

I'm trying to clear up some uncertainties around the mempool A tx comes in, its validated, and no other transactions have currently marked any of its inputs. Tx gets added to mempool. If a double ...
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if bitcoin miner(s) changed the UTXO set would the bitcoin nodes reject the blocks?

if so, would this cause a Fork? or what would happen?
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How to rebuild the balance of a Bitcoin address using bitcoin

As from the title of the question. I'm using these biconij 0.15.2 and following jar libraries: guava 0.28 bcprov-ext-jdk15on slf4j-2.0 and have downloaded all the full node blockchain Bitcoins. I ...
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1answer
75 views

Privacy: How should I handle UTXO's?

We know that, for security and anonymity, we shouldn't reuse addresses. Also, there is the idea of change avoidance to protect ourselves from any number of change detection heuristics. But I find ...
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Signing a Tx that has multiple UTXOs

Using Go language, I am trying to create a BTC transaction, using multiple UTXOs. I am adding the UTXOs by doing this: Tx.AddTxIn(TxIn) creating the TXOuts one for the amount to send out and one for ...
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Why does binance send a small amount into another utxo while sending to cold wallet?

I believe the address 1NDyJtNTjmwk5xPNhjgAMu4HDHigtobu1s belongs to Binance. If you look at this transaction for example https://blockchair.com/bitcoin/transaction/...
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Uneconomical UTXO requested

I'm using btc.com wallet and i want send 0.001 btc to another address but i'm facing with this error: Uneconomical UTXO requested [type: 1 (limit 6831), txOut.val: 5897, required: 98140] what does it ...
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Uniquely identifying a UTXO

I see two ways: Txid + index Txid + script hash Pros of the txid + index: Simple and short Cons of txid + index: It relies on array iteration being deterministic and all third party ...
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Swift implementation of bitcoin transaction creation

Is there a well known and widely used Swift implementation for creating raw Bitcoin transactions and getting their hash (SegWit and Non-SegWit) of signing? If not, is there a reference document that ...
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1answer
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How to create an application which constructs a transaction using `bcoin` (javascript)?

I am new to development. I am working on a project and I am trying to use bcoin. I want to create an application which has a UI, where the user will be asked to enter Destination address and amount. ...
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1answer
30 views

Can I receive detailed tx data via command line using only a lightclient?

I recently tried to sync the Bitcoin blockchain, but my laptop does not have enough space on it. I want to be able to analyze UTXOs and raw transaction data. Will a lightclient allow me to do this?
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1answer
251 views

Pycoin: How to sign SegWit transaction via Pycoin?

My target is to make transaction with unspent transaction outputs(UTXOS). The information of UTXOs is as follow. [ { "pt_idx": 0, "subaccount": 37, "ga_asset_id": 1, "value": "...
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1answer
328 views

How to get unspents for inputs using bitcoinjs-lib?

I would like my simple wallet app to automatically select UTXOs for inputs. I realize that I can't accomplish this with just bitcoinjs, but is there something I can add to it to keep track of unspents?...
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414 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?