Questions tagged [coinbase-transaction]
The "coinbase transaction" is the transaction inside a block that pays the miner his block reward.
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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 ...
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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 ...
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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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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('...
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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
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23 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 ...
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How do I request fund using coinbase api
Hi I am trying to use coinbase api in php.api implementation working fine, I can check balance, creat new address all this are working fine.But facing problem on request bitcoin. I am following ...
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1answer
48 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 ...
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native support for coinbase/append in getblocktemplate
I'm trying to understand the "coinbase/append" capability outlined in BIP 23. Essentially, why is it not supported in bitcoin's getblocktemplate method? Does the capability not make sense in that ...
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40 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?
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should i can use my coinbase 12 backup phrase into blockchain wallet?
i have one question in my mind
i can able to recover my wallet of coinbase using 12 backup phrase into blockchain wallet
it will be accept it?
and restore my all crypto of coinbase into blockchain ...
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87 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 ...
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114 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 ...
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57 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 ...
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1answer
66 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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237 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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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 ...
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58 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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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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222 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 ...
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218 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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237 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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114 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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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 ...
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1answer
105 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
45 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
...
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1answer
454 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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379 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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101 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
62 views
Weird script stack entries at block #227837?
At block 227837 , the coinbase TX
e35ca7413b61397a49551fea6ebb540988afcf4a2d0e750773d38eb11b138f40
has the following script:
...
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1answer
322 views
Where is the extraNonce in this coinbase transaction here?
https://blockchain.info/tx/c1669dabe1bcadf50c4b712e42da7b3d3152aef53752731b04a4f585dde6f5f2
The coinbase states this:
...
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186 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?
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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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244 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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194 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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163 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 ...
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51 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. ...
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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" ...
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61 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 ...
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2answers
753 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'...
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362 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 ...
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575 views
How to read the transaction of a block?
Given this example block (it's the genesis block by the way):
...
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1k views
Can Coinbase Bitcoin network fee really be 50%
Ive just bough £47.81 of bitcoin. After fees i'm left with 0.00375837 BTC.
I want to buy another cryptocurrency but the network fee is 0.00186539 so i'm left with only £24.41.
Can this fee be ...
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1answer
559 views
Does GDAX use its own wallet to send Bitcoin on my behalf?
I am new to cryptocurrencies and Bitcoin specifically. I recently made a transaction by transferring some Bitcoin from my GDAX wallet to my Binance wallet.
Here is my public key: https://blockchain....
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2answers
3k views
Coinbase purchase bitcoin transaction pending, why is it painfully slow to purchase [duplicate]
I have purchased bitcoin using coinbase app 3 hours ago and the transaction is still pending. Is it usually this painfully slow to transact on coinbase?
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1answer
5k views
How is 10% transaction fee possible for a bitcoin transfer from coinbase to another exchange?
I moved 0.01BTC from coinbase to another exchange and i got charged 0.001BTC for it. This is 10%!!. I understand concept of dynamic pricing depending on network crowding etc. However, how is 10% fee ...
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796 views
Just received a payment twice from coinbase
Edit: Looks like the error was with my wallet. When I contacted support, they said to have the wallet rescan the block chain. After doing that, my balance went back to 0.
I'm new to bitcoin, but ...
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398 views
Why does the Genesis block coinbase input script push bits and the value 0x04 before the famous “Chancellor” message?
According to the Wiki, the input script of the Genesis block consists of these bytes:
...
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78 views
Can I download only a coinbase transaction at a specified block height?
I want to implement a client similar to SPV client.
The client will download block headers and coinbase transactions.
There is an api of downloading block headers such as getheaders.
However, it ...
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156 views
Replay attacks: can a coinbase transaction be replayed?
I'm pretty sure that I understand how replay attacks work:
A malicious node takes a valid transaction from chain A, and replays it on chain B. Other nodes on chain B see the transaction as valid and ...
