Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [utxo]

Unspent transaction outputs are created by transactions and allow the owner of an associated address to spent a specific amount.

0
votes
1answer
22 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 ...
-1
votes
0answers
33 views

Where can I see the unconfirmed RawTX blockchain?

Is there such a service or website? Where can I see the unconfirmed RawTX blockchain?
1
vote
3answers
47 views

What is the order in which UTXOs are sorted in a block?

Let's say, I am trying to do a double spend by creating two transactions almost immediately, is it possible that both the transactions are added in one block ? If yes, then which transaction is valid ...
1
vote
0answers
15 views

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 ...
3
votes
1answer
180 views

How bitcoin nodes update UTXO set when their latests blocks are replaced?

Let's say bitcoin node has 100 blocks. Then he recieve another two blocks. Now it have 102 blocks. But now he recieve block 103. And this block is from another chain and our node have to remove blocks ...
0
votes
0answers
17 views

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 ...
0
votes
0answers
32 views

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/...
2
votes
1answer
41 views

How do blockchains in each nodes maintain consistency?

What I understand as (Please correct me if any statement is wrong) Every full node tries to generate a new block, in which different amount of transactions are included and what to be included will ...
1
vote
1answer
33 views

How does a Bitcoin (Core) wallet use inputs?

When creating a new transaction, how does the Bitcoin Core wallet (or any other wallet) handle/use the outputs (UTXO's)? e.g. when 2 outputs have to be used, will Bitcoin spend the highest address (...
0
votes
1answer
42 views

Signing a blank input?

Is it possible to include a blank input in a transaction? For example, a blank input could be used to guarantee a particular output was included in a transaction, using SIGHASH_SINGLE | ANYONECANPAY ...
0
votes
1answer
25 views

Is SIGHASH_NONE encompassing of other signature types?

Say I am building a transaction in private: Input 1 is signed with SIGHASH_SINGLE ( | SIGHASH_ANYONECANPAY) Input 2 is signed with SIGHASH_NONE | SIGHASH_ANYONECANPAY SIGHASH_NONE implies that ...
0
votes
1answer
38 views

Why is there sometimes no output that sends funds back to the sender's address?

'A' has one bitcoin. 'A' tries to send a 0.5 bit coin to 'B'. Two utxo are created. First, "utxo" sends "B" 0.5 bitcoin. Second, "utxo" where "A" remits remaining bitcoins to "A" except for 0.5 ...
0
votes
2answers
58 views

Transactions with multiple input UTXOs and multiple output UTXOs

Suppose a transaction t has 5 input UTXOs each worth 1 BTC, each unlocked by a different sending address Ai. The outputs of that transaction are 10 UTXOs of 0.5BTC each, each locked by a different ...
0
votes
0answers
1k views

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 ...
4
votes
1answer
98 views

Are all UTXOs locked by an address spent in a transaction?

Imagine I have 2 UTXOs locked by my address, each of which allows me to spend 5 bitcoins. If I subsequently want to send just 2 bitcoins to someone else, will both UTXOs be used as inputs in the ...
0
votes
0answers
30 views

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 ...
0
votes
0answers
15 views

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 ...
0
votes
1answer
38 views

Spending UTXO from same block

Block 546 is the first time a (actually two) transaction spends the UTXO of a transaction from the same block. Is the order important? (The transaction that generates the UTXO has to appear before in ...
1
vote
2answers
98 views

If I was developing a Bitcoin wallet, should I support both legacy and compatibility addresses?

To receive funds, I was thinking of giving a user the option of displaying two QR codes: Legacy - p2phk e.g. 1AKDDsfTh8uY4X3ppy1m7jw1fVMBSMkzjP Compatibility - p2sh(p2wpkh) e.g. ...
0
votes
1answer
42 views

Use UTXOs before transaction is signed/broadcasted

Suppose I have an address with a single UTXO. I want to create 100 transactions and sign/broadcast them all at once. Could I do the following: Create a transaction by hand (where change funds are ...
0
votes
0answers
17 views

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. ...
0
votes
1answer
27 views

Question about UTXO and indivisibility

I'm reading about the concept of UTXO. Everywhere I read, it says that a UTXO in an account is indivisible. One analogy said: "It's as if you wanted to make a $5 purchase with a $10 bill. You wouldn't ...
1
vote
0answers
19 views

Are there any other balance management systems other than UTXOs and Account Based used by blockchains today?

To know how much balance a user has on the bitcoin blockchain you just need to look at their UTXOs. To do the same in Ethereum you just look at their accounts. Are there any other systems used by ...
0
votes
1answer
87 views

The risk of sending money to a xpub generated address

Suppose the owner of xpub share the xpub to others, and someone send some money to a xpub generated address. If the owner of xprv does not know the path used to generate that new address, is that ...
0
votes
1answer
35 views

How does an SPV client forms a transaction which is then Broadcasted?

As per my understanding, an SPV client only keeps a track of the block headers in its own database. So when a user tries to send bitcoins using that particular SPV client, how is the transaction ...
0
votes
2answers
39 views

Reference an UTXO of a transaction that has not been yet mined

How to reference an UTXO that has not been yet mined? I want to prepare a transaction and, before spreading it, use its UTXO as input for another relative timelocked transaction. Then, spread the ...
3
votes
1answer
190 views

How to find all UTXOs?

It is known, that UTXOs stored in chainstate database. But how to get them in simple txt view? Not ballances, but each UTXO.
4
votes
1answer
42 views

Is the bit encoding format for the graphic in BIP 68 implicitly little-endian?

CLTV (OP_CHECKLOCKTIMEVERIFY - absolute locktime) and CSV (OP_CHECKSEQUENCEVERIFY - relative locktime) utilize BIP 68. Is the locktime for those two operations implicitly encoded in little-endian ...
5
votes
2answers
153 views

Do UTXO's ever get consolidated to avoid complexitity?

In 'Mastering Bitcoin' (pg 130) it is explained that a transaction will require higher fees if it is complex. For example, if I collect bitcoin from 100 people to buy a single tent, then when those ...
0
votes
1answer
24 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?
0
votes
1answer
95 views

What happens to a node if .bitcoin/chainstate is corrupted?

I tried to search for answers to my questions, but didn't find any, but please forgive me if this is a duplicate question. Suppose somehow .bitcoin/chainstate gets corrupted, e.g., a UTXO is deleted. ...
2
votes
0answers
60 views

Is there a UTXO for IOTA?

How does the cryptocurrency IOTA keep record of the spent coins? Is there something similar to the UTXO where the unspent coins were recorded? And it somebody wants to spend a coin, do you have to ...
1
vote
2answers
78 views

How to cheaply melt many micro UTXOs?

I know this was probably brought up before but I cannot find any good resources on some potential, at least theoretical way of achieving this. So basically I have a lot of UTXOs whose value is ...
1
vote
0answers
39 views

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 ...
0
votes
1answer
49 views

Which values are GetValueIn() and GetValueOut() calculate?

In Transaction.cpp, there is a function CAmount CTransaction::GetValueOut() const. In Coins.cpp, there is a function CAmount CCoinsViewCache::GetValueIn(const CTransaction& tx) const. My ...
0
votes
1answer
66 views

UTXO transaction consolidation?

As a relatively new user, I have only generated a handful of public addresses. Usually, to move to a newly discovered and preferred wallet. I’ve only recently learned that a single seed phrase can ...
0
votes
1answer
63 views

I seem to have too many unspent outputs for my given balance. What am I missing?

I have an address on the testnet. I started out with 1.3 btc. I then sent 0.5 btc to another address. My balance is now 0.8. OK, that makes sense. I expect now to have one UTXO which was the 0.8 in ...
1
vote
1answer
359 views

State of transaction and UTXO

What I have learned is that state is an abstract thing and is maintained by the node locally and the state of the current blockchain can be reached by starting all the way from the genesis block and ...
2
votes
2answers
112 views

If I reuse the same address can a previously used transaction be reused?

I was wondering, if I used an address adr0 to spend some coins in a transaction tx0 that give the coins to a different address adr1, and eventually, after some time, I receive some (completely ...
1
vote
0answers
61 views

Zcash T-address address wise UTXO transaction list both testnet and mainnet API [closed]

I need API for address wise UTXO transaction list for Zcash t-address for both testnet and mainnet.
0
votes
1answer
61 views

What does a bitcoin transaction contain?

I'm learning about basic transactions and know that a transaction should contain: i) Signature of the sender using some operator: sign(private key,message) ii) Receivers Public key (wallet address) ...
0
votes
1answer
38 views

How many change outputs are there in a Bitcoin transaction

I have been reading the following article: https://coinmetrics.io/difficulty-estimating-chain-transaction-volume/ It mainly discusses how unreliable transaction volume on a UTXO blockchain such as ...
3
votes
3answers
697 views

How does the wallet identify which UTXOs belong to a public address while creating a new transaction?

I am a beginner here. A Transaction output has a field for amount and a locking script but no direct field for public address for which the output is meant. When a new transaction is being created, ...
3
votes
1answer
282 views

Why does the order in which the transactions occur matter when we reconstruct ownership information?

I was wondering why the order in which the transactions occur matters when we reconstruct ownership information. Can't we just aggregate all the input and output for each account to calculate how much ...
1
vote
1answer
230 views

How can I get UTXO for a specific address?

Are there API's I can use to get this information?
1
vote
1answer
176 views

bitcoin chainstate database parsing in python giving wrong value

I am trying to decode chainstate db for a specific out index for a transaction in python just for learning. Transaction ID: 4d4a4c6ca4f3c91e69563199943336d3279fad71c9e8d9c1708ef9dc6ac16000 out index = ...
1
vote
1answer
59 views

Conflicting transaction info on Blockchain.info and Jaxx compared to other sources

I sent a batched transaction with 3 inputs pointing to the same output address. The receiver claims they only received 0.00042 BTC when they should have received a total of 0.00128615 BTC. She is ...
1
vote
1answer
293 views

utxo vs account-model [duplicate]

There are two possible models, the UTXO model and the account model. Each has advantages and disadvantages. Bitcoin chose the UTXO model. XRP and Ethereum for example use an account model. What are ...
5
votes
1answer
368 views

What are the standard formats of transaction outputs?

A transaction output can have the type Pay to public key hash, P2PKH, where the ScriptPubKey field has the format: 76 a9 14 <20-byte hash of pubkey> 88 ac Pay to script hash, P2SH, used for e.g. ...
0
votes
1answer
120 views

get the location of UTXO data

I need to find the location of the code which deals with UTXO, and then implement FIFO on UTXO storage. I aint able to find the location of UTXO code and also where it is stored.