Questions tagged [coinbase-transaction]
The "coinbase transaction" is the transaction inside a block that pays the miner his block reward.
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Why is the scriptSig formatted this way in the Genesis Block (inside function CreateGenesisBlock)
I was exploring the function static CBlock CreateGenesisBlock inside src/chainparams.cpp and I was looking at the way Satoshi created its scriptSig:
txNew.vin[0].scriptSig = CScript() << ...
3
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1answer
39 views
What does “generate” mean when it appears as a transaction's type?
What is "generate" as a bitcoin transaction type? Why are "generate" transactions labeled as "immature" for 100 blocks? Is this type of Bitcoin transaction spendable?
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1answer
49 views
A Bitcoin soft fork idea to help compress the blockchain
I've thought about a soft fork that can help storage costs.
Why don't we force miners to embed the height of the TX Merkle tree in the first two bytes of the 4-byte block header version?
It would ...
0
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1answer
34 views
Script_sig for coinbase transaction afbff1130b6fcbdceebbadfc48a842af1f03ee08a79e042b37fc467518b49a0f
I am currently developing a blockchain parser in Python, and it has been crashing in the file blk00006.dat for the coinbase transaction with the hash ...
1
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1answer
27 views
How does exchanges, such as coinbase handle off-chain transaction?
Does coinbase create a channel between each customer and coinbase itself?
If i buy 10 USD of bitcoin from coinbase, where does the 10 USD worth of bitcoin come from? Does coinbase maintain a huge ...
0
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1answer
36 views
Is it possible, with bitcoin-core or btcd, to manually set the scriptSig field in a coinbase transaction?
I am talking about when using regtest or simnet modes.
For context, it is so that I can create coinbase transactions with reproducible txids.
3
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1answer
82 views
Can a coinbase transaction have a segwit output?
And more generally speaking, are there any restrictions on the output of a coinbase transaction?
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68 views
Where and when should the coinbase transaction(including the miner key) be added?
I'm making a simple demonstrator program, pretty much a simplified bitcoin clone based mostly on the original whitepaper.
Please bear with me, because I haven't found a way to describe the problem ...
3
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1answer
51 views
Was it always required for the Coinbase transaction to be the first transaction in a block?
The user tempo mentioned on another topic:
"At least in the early protocol versions it was possible to put the coinbase transaction not on the top of the outputs."
I have never heard about this ...
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0answers
21 views
Coinbase customer service [duplicate]
Does anyone know how to get a hold of a human being on the phone at coinbase? Or the contact info of a good crypto lawyer? Their customer support is lacking. I have a stuck transaction going on two ...
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1answer
214 views
How to create a bitcoin transaction without inputs
How can I create a transaction without inputs and it will be broadcasted but of course won't get confirmed? I would like the simplest method to do this
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1answer
266 views
How to decode a coinbase transaction?
Below is block result of block height 200,000
{
'hash':'000000000000034a7dedef4a161fa058a2d67a173a90155f3a2fe6fc132e0ebf',
'confirmations':396774,
'strippedsize':247533,
'size':247533,
...
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1answer
136 views
reconstruct block template from stratum mining.notify
I have a mining notification from a stratum pool. I wish to write a general script to extract the value of the block reward that the pool is taking. That is, reconstruct the block template, or at ...
1
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0answers
14 views
Where are Drivechain votes computed?
In the context of the Drivechain proposal, for UTXOs in miner-controlled escrows to be spent, they have to be voted on by each block over a large number of blocks, right?
Now, how are these votes ...
3
votes
1answer
232 views
Why does this coinbase transaction have two op_return outputs?
I've been looking at coinbase transactions for fun and I came across one with two op_return outputs..
Does anyone know what the second one is?
Also, I understand the first op_return is used to ...
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0answers
25 views
BIP0034 block height using python-bitcoinlib
I'm doing some experiments for finding coinbase height from freshly mined block which is received from ZMQ.
tx_coinbase = CTransaction.deserialize(x('...
0
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1answer
889 views
how recover my money in Coinbase Wallet?
I just wanna ask if there is possibility to recover my money in coinbase wallet. I forgot my recovery phrase but i remembered my btc wallet address and TXID. thanks
0
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1answer
33 views
Can a block have multiple coinbase transactions? Also is there a limit to the number of signatures a multi-sig transaction has or requires? [closed]
I am wondering if a block can be created with multiple coinbase transactions. The US government regulates mining pools that have control over the miner's wallets, so it would be fabulous if this could ...
2
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1answer
74 views
Can a miner give themselves less than the maximum block subsidy if they wish to do so?
The current maximum block subsidy is 12.5 bitcoin. A mined block recently got rejected from full nodes after a miner tried to post the block subsidy as 13.26 bitcoin. But what about in the other ...
2
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1answer
64 views
When does miner insert the coinbase transaction?
When a miner creates the candidate block with transactions from the mempool, does he insert the coinbase transaction after winning the PoW or during PoW?
0
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1answer
153 views
Is Coinbase transaction required to be signed?
I am trying to build a coinbase for mining with the following steps:
1-Create dummy Input and output.
2-Pass them to CreateRawTransaction as collection/
3-Get a transaction back and fill the empty ...
0
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2answers
171 views
What is the source of initial transactions of bitcoin?
Sorry, if I am wrong or silly!
It is understood that:
a) Satoshi Nakamoto sent the first transaction to developer Hal Finney on January 12, 2009, the genesis block contains 1,073 transactions and he ...
0
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1answer
63 views
Is there a maximum balance that a single address can hold?
Is there a maximum number of satoshis that a single address can control at a single time? I ask because when I generate regtest blocks to a single address, it's balance gets stuck at 1494999998350 ...
3
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1answer
78 views
What is the maximum number of bytes the coinbase scriptSig (coinbaseaux) can hold?
Since the scriptSig of the coinbase transaction of a block can contain arbitrary data, what is the maximum number of bytes it can contain? I've seen various mentions of a limit around 100 bytes, but ...
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1answer
338 views
Is there a way to create coinbase transactions with an RPC command?
Is there a way to create coinbase transactions with an RPC command?
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1answer
312 views
collecting block reward and transaction fees
i was reading document about transaction data and there seems to be two contradicting paragraphs:
Every block must include one or more transactions. The first one of these transactions must be a ...
2
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1answer
162 views
identical coinbase transactions
this sounds like an old topic but i have not found a satisfying answer yet; in history there lived two blocks with identical coinbase transactions:
https://www.blockchain.com/btc/block-index/106662
...
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2answers
359 views
What is the purpose of the script like RETURN PUSHDATA(36)(…)
The example is in here:
https://www.blockchain.com/btc/tx/63910fdfa84db96bd1f28fead4c32f97388d5368c10059d035aac3c5f72fcdc0
Actually, there are two outputs
DUP HASH160 PUSHDATA(20)[...
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1answer
304 views
Differentiating Output Script (scriptPubKey) Types
I am working on a little script to breakdown the data inside coinbase transactions. This is largely to improve my understanding of legacy and SegWit transactions (Given coinbase transactions have less ...
3
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1answer
282 views
Why does Bitcoin block 526,591 have a 6.25 (instead of 12.5) block reward?
https://chain.so/block/BTC/0000000000000000002ba5a1fb96f93e6c215d62db4280f1cbd30e82c7c71fba
https://blockchair.com/bitcoin/block/526591
It's an empty block (zero transactions), but the coinbase ...
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1answer
296 views
Variables in Coinbase Transaction & Decoding I/O Scripts
I just have a few questions to help better my understanding of the coinbase transaction.
Example:
...
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1answer
193 views
How does the hash of a coinbase transaction differ for the same miner?
Based on the format of a coinbase transaction described here: What is the format of the coinbase transaction?, I don't see how the all the coinbase transactions for a given miner do not all have the ...
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1answer
62 views
I got a coinbase transaction and I don't know where it comes from
I received a small payment from a coinbase transaction, but I haven't been mining nor I have signed up on a mining pool. Does this happen when someone accidentally sets my address instead of theirs ...
1
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1answer
119 views
What does this comment in Chainparams.cpp mean?
There is a comment in the Bitcoin source code under src/chainparams.cpp
/**
* Build the genesis block. Note that the output of its generation
* transaction cannot be spent since it did not ...
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1answer
59 views
Fail to encrypt scriptPubKey in testnet
I have the following testnet wallet address:
2MsQEtPJ6JJZszMYrD6udjUyTDFLczWQrv9
Which I am trying to encode as pubkeyhash to the coinbase TX in testnet.
When i run decode58, I get this
...
2
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1answer
678 views
OP_RETURN in a coinbase transaction?
Hey looking at this transaction I'm confused why there are two outputs and why one of them is labelled with OP_RETURN
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3answers
508 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 ...
2
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0answers
111 views
In DASH, why is in the coinbase transaction sometimes the first output the masternode reward, and other times the second? [closed]
Example of the first output being a masternode reward
Example of the first output being a proof-of-work reward
What determines the order of the outputs in the generation transaction?
As far as I ...
2
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1answer
67 views
Weird script stack entries at block #227837?
At block 227837 , the coinbase TX
e35ca7413b61397a49551fea6ebb540988afcf4a2d0e750773d38eb11b138f40
has the following script:
...
0
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1answer
454 views
Where is the extraNonce in this coinbase transaction here?
https://blockchain.info/tx/c1669dabe1bcadf50c4b712e42da7b3d3152aef53752731b04a4f585dde6f5f2
The coinbase states this:
...
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1answer
226 views
Coinbase transaction data
Can a coinbase transaction contain only data: 03 - length and 030303 - coinbase itself, or should the coinbase itself contain the height of the block?
0
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1answer
111 views
Why do not all the coinbase texts have the block heigh in it?
The coinbase text of #511329 starts with a, #511330 starts with b, #511331 starts with c... (and so on until z), but #511426 for example starts with F, the next one with m, the next one with "... ...
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1answer
273 views
Why maturity rule on coinbase tx requires too many confirmations w.r.t an arbitrary tx?
For an arbitrary tx, it is often said that 6 confirmations is sufficient. However, maturity rule states that coinbase tx can't be spent until it receives 101 confirmations. Why do we have this ...
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2answers
239 views
A different way to create coinbase transaction
AFAIK when a miner succeeds in creating a block, he puts a special transaction (coinbase) in it which spends no input and sends a fixed amount of BTC to an address he can arbitrarily specify.
Instead ...
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1answer
176 views
Orphan block payment maturity
I know that the outputs coinbase transaction can be spent only after receiving 100 confirmations.
So is it that a miner who mined an orphan block receives the outputs of coinbase transaction but can ...
0
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1answer
58 views
Why is BTC transfer on coinbase taking 30+ hours? [closed]
I'm really frustrated from the really bad service of coinbase.com.
I'm waiting for a transfer of 0.14 BTC for 30+ hours which is ridiculous! Customer support is totally missing, service is really bad. ...
0
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3answers
65 views
Is there a way to access transactions that happen inside exchanges?
For example coinbase is an exchange and so, their transactions are done off of the blockchain.
They do however expose an API, which I believe should expose their own coinbase "blockchain" ...
0
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1answer
63 views
Spreading reward of a block over the miners proceeding it
Say I want to implement a rewarding scheme that spreads the reward of a block over its own miner and the miners that build on top of it. Is it possible?
More concretely, say each of my blocks bring ...
0
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2answers
920 views
Why does won't my bitcoin transaction complete? It has thousands of confirmations
My transaction has over 4000 confirmations and has been pending for over 3 weeks in my Coinbase wallet. The money is not available and shows as "pending". What is going on? If it had 0 confirmations I'...
0
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1answer
384 views
Why is it so expensive to transfer Bitcoins?
I am starting with bitcoins and I want to buy some neo and ripple. Like every newbie I typed "Buy neo" on google, and a lot of tutorials say I can not buy directly neo, I have first to buy some ...
