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Questions tagged [transaction-id]

The unique identifier of a transaction corresponding to the sha256d hash of the transaction.

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1answer
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how can i get rid of a zombie channel in LND?

My LN-Node: 023bf99414b3e93ab7463ce60f44cd691f8be3c1ae33a2015fe784c85c36e770cf bitcoind 0.17.1 // LND 0.5.2-beta commit=v0.5.2-beta-rc7 Channel: 598078250466476032 Problem: lncli feereport returns: ...
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1answer
51 views

Ripple: How to calculate transaction ID (TXID)

Given a signed Ripple transaction, how do I calculate the txid?
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1answer
78 views

SPV clients querying the full node

Is there a way currently where an SPV client can send a TxID to a full node which is present in the UTXO set of the full node and have the full node not scan its entire blockchain to fetch the ...
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1answer
22 views

Custom transaction IDs

I understand that TxIDs are simply the double hash of tx data. But who creates them? I assume that all the nodes create the TXIDs of the transactions on their own and the TxIDs are not transferred ...
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2answers
280 views

Why didn't Bitcoin implement segwit in the first place?

Why didn't Bitcoin implement segwit in the first place? Why and how does non-segwit Bitcoin enable a miner to change a transaction's txid? From Mastering Bitcoin ch. 7 § "Transaction identifiers": ...
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1answer
112 views

Getting transaction id from raw transaction of a multisig address

I am able to get the tx id (or transaction hash) of almost any transaction but the one where the script starts with an "OP_O" (which is, I think, the null dummy introduced here https://github.com/...
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1answer
36 views

What does postfic in the wallet transaction id mean

It's known the txid is always a 32 byte hex sequence for example ceca9c54d1a2f9122326a871a3b0b20b725540137e80cb50da663a404f7849a8, but when inpecting the transaction in a wallet it shows it with a ...
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1answer
168 views

Confirm transaction in regtest mode

I'm testing some wallet features on regtest. Here's the sequence so far: cash-cli -regtest generate 101 cash-cli -regtest getbalance 500.00000000 cash-cli -regtest getnewaddress newAddress1 ...
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1answer
40 views

Question about identical txids/merkle tree in Developer guide

I am new to the technical details about Bitcoin and has been reading Developer guide on bitcoin.org. I have a question about below contents mentioning merkle tree, identical txids. I googled and ...
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1answer
142 views

Confused About Hash In Satoshi Nakamoto Diagram

In Satoshi Nakamoto's diagram: Consider the Hash block in the first transaction block above: How is that Hash value calculated? I see arrows from an Owner's Public Key and another arrow, so it's ...
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1answer
62 views

Get input address using VIN txid?

I have written following script to get Vin address from Vin txids. #!/usr/bin/python # -*- coding: utf-8 -*- import requests,json url="http://asd:asdf@localhost:2332" payload={} payload = {"jsonrpc":...
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3answers
307 views

Getting the wrong txid for coinbase transactions

I'm trying to hash transactions to get the txid. I get the hex values from blockchain.info. I get the correct hash for all transactions except for the coinbase when I hash it twice. Is there something ...
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4answers
597 views

I think I found 241 Bitcoin [closed]

I have been having dreams for the past month about BTC and an old computer I had bought Bitcoin on a long, long time ago. I just found said computer in my grandmother's basement. Booted it up and lo ...
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1answer
329 views

Find message attached to Bitcoin transaction?

Given a txid, can I find out the message/comment the transaction was attached with by the sender?
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1answer
635 views

How to compute SegWit txid?

BIP141 says wtxid is SHA256 of [nVersion][marker][flag][txins][txouts][witness][nLockTime]. Is data that hashed as txid includes witness? And will txid be presented in block, e.g. be counted when ...
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1answer
352 views

How does TXID gets created and at which point

I see TxID in bitcoin transaction input as reference of the UTXO. How does TXID gets created and at which point, wallet or node?
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1answer
119 views

Why does bitcoin-cli not show the correct TXID for this transaction?

I've been decoding some transactions on Testnet, and I've found one that bitcoin-cli decoderawtransaction seems to "fail" to decode correctly. Here's the TXID: ...
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1answer
317 views

After creation, what I have to do with a coinbase transaction?

I have create a coinbase transaction successfully with the command: createrawtransaction '[{"txid":"0000000000000000000000000000000000000000000000000000000000000000","vout":0}]' '{"...
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1answer
286 views

Values for txid and vout for create a coinbase transaction

I want create a coinbase transaction to go with a new block minned by my program. I am creating it with the json-rpc command createrawtransaction. What's the values for txid and vout in this case?
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0answers
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How long the specific txid remains in the mempool? [duplicate]

what's the average time the txid remains in the mempool ? is it until it gets confirmed or is there any other criteria ?
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1answer
330 views

SegWit and previous hash: txid or wtxid, or either?

With segwit there will be two transaction ids wtxid and txid Can either one of them be used as previous hash or only txid?
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1answer
645 views

Is the Bitcoin Transaction ID also the “Hash of things to sign” for the signature generation?

As a random example, is the transaction id: 114be7fea4d3dd0cf2e88a8fa9a56d4ea741efbabd07d61d08cf0810be2254fd Also the hash that was used as the "hash of things to sign" for the "signature generation"...
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1answer
71 views

tx-malleability who re-signed the tx?

It would be really great if there was a way to loop through all the txids in a new block and be able to check if you (can) sign your original transaction the same way it was re-signed - that it ...
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1answer
509 views

Possibility of validation of transaction TX id

I've readed numbers of thread here but non answer to my question. What I want to know if there is a way somehow to validate transactionID ( txID ). I have a site which accepts bitcoins. In order to ...
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1answer
592 views

Create raw transaction what txid

I want to check for every transaction if there is enough balance to pay it(including fee). I found this question: Is there a way to know the Bitcoin Network transaction fee BEFORE actually submitting ...
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1answer
621 views

Duplicate transactions in blockchain

Can someone explain what does this mean: As i see: 2 transactions are having SAME txid and differ just by address. Is this normal behavior? Should I get both transactions in such cases?
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2answers
244 views

What would be the fastest way to query for a certain txid to get its inputs?

I am working in an artistic/visualization project that analyses Bitcoin transactions. I have a Bitcore instance with insight API and from a Python script I query through the REST API so the queries ...
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1answer
150 views

How are transaction IDs generated and how are they then changed by transaction malleability?

How are the transaction IDs generated for a Bitcoin transaction? How can the transaction ID change due to a transaction malleability attack?
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1answer
1k views

Figure out transaction ID

How can I find out the ID of a transaction I just made? I sent bitcoin to a site and they are requesting me to send the transaction ID to them. How do I find it out?
2
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1answer
70 views

What is the impact of purposely sending a signed message with zero fee?

Would it be appropriate use of me to send a message with 0 fee on purpose if I have no need for the message to remain on the blockchain after it is seen by the recipient? I could sign a transaction ...
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1answer
291 views

Why do you have to search for TXIDs in little-endian?

I understand that when you double-sha256 some transaction data, it will give you the TXID for that transaction. This can then be used in future transaction data when you want to reference an existing ...
6
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1answer
1k views

What happens when two txid's collide?

Let's suppose that I can create SHA256d collisions, and I use this ability to create two transactions that have the same hash, A and B. These transactions are not the same, but they hash to the same ...
3
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1answer
2k views

Compute TxID of Bitcoin Transaction

Originally posted to StackOverflow but with no response. Thought I might have better luck here. I've successfully created a Bitcoin transaction in C# according to the protocol specifications. Here's ...
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2answers
207 views

Sending funds on same block of received funds. Confirm sending not received?

My question in quite conceptual: For creating a raw transaction, I just need the txid from the older transaction and the address to send it. Put the funds, the change, what's left is the fee. Sign it ...
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1answer
2k views

Pairing pattern of txids in merkle tree

For constructing the merkle tree txids are paired and hashed. ¹ But how are these txids paired? Does it happen chronologically or is there a certain pattern of pairing?
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1answer
1k views

Duplicate tx ids

Is there a quick and dirty way to detect all transactions whose tx-id can be found in more than one transaction since the genesis block? I would also like to see mutated transactions as well ...
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1answer
639 views

Are transaction ids always the same length?

Do all bitcoin transaction ids (hashes) have the same length? I guess it's defined somewhere here: https://en.bitcoin.it/wiki/Protocol_specification but still I couldn't find it.
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2answers
307 views

Why does txID generation consider signatures?

I've been reading a lot about transaction malleability, and noticed that the only way to achieve it is by altering the transaction signature/s. Why does the protocol even consider the signature in ...
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2answers
7k views

How do I calculate the txid of this raw transaction?

I'm trying to parse a bitcoin block using Python. I called getrawtransaction over JSON-RPC. I got this: ...
3
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1answer
3k views

What is the transaction ID?

I have sent a Bitcoin amount to someone who wants the transaction ID. What is this? Is it the hash shown on the LHS of the transaction?
3
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1answer
135 views

By whom and when can transaction malleability be applied?

Once I create a transaction and relay it to the network, who can alter the transaction id? Can the transaction id change at any time or only when the transaction is confirmed or unconfirmed?
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1answer
324 views

Duplicated hash values in mining reward

This transaction is contained in two MainChain-Blocks: https://blockchain.info/tx/e3bf3d07d4b0375638d5f1db5255fe07ba2c4cb067cd81b84ee974b6585fb468 On Blockexplorer there is a note of this anomaly: ...
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1answer
3k views

How to find a block containing a transaction using transaction hash only?

Well, the title says it all. I have a transaction hash and I want to find this transaction in the blockchain. I am working with bitcoinj. I am probably missing something very obvious here, but I ...
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1answer
907 views

How to get transaction id (txid) in UI

I deposited dogecoins in my cryptsy account through faucet. How the transaction id (txid) has been displayed in cryptsy UI? suppose I make the transaction then I know the transaction id, but how ...
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0answers
223 views

When computing a normalized transaction id, when do I finalize the sha256 hash?

I'm trying to compute the normalized transaction ID so that it matches what is on blockchain.into at the following URL http://blockchain.info/q/hashtontxid/ --- normal TX ID here ---- Given that I ...
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2answers
678 views

How can I avoid transaction malleability consequences?

Please note that this question is NOT a duplicate of other questions regarding transaction-malleability. My question is regarding a following scenario, that could happen on an exchange that uses on-...
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0answers
693 views

How do I generate a transaction id?

I'm new to the technical side of bitcoin and I'm currently just messing around with the bitcoin daemon. I'm trying to create a raw transaction but I have no idea what to put for the transaction id ...
2
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1answer
138 views

Alternative chain shows blocks with empty TXIDs - what's going on?

An alternative chain based on Litecoin 0.8.6.1 that I have an interest in is during certain low-difficulty periods showing several blocks that contain empty TXIDs. Digging into the TXIDs return ...
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1answer
4k views

What is Transaction Malleability?

The Bitcoin exchange MtGox has stated in this press release that "transaction malleability" caused them to stop sending bitcoins. A recent question asked if it really is an issue. But what is ...