Questions tagged [coinbase-transaction]
The "coinbase transaction" is the transaction inside a block that pays the miner his block reward.
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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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1answer
40 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
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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
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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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48 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 ...
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1answer
39 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
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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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1answer
115 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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1answer
143 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
112 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
48 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
34 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 ...
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1answer
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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
32 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
261 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
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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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0answers
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In DASH, why is in the coinbase transaction sometimes the first output the masternode reward, and other times the second?
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 ...
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1answer
57 views
Weird script stack entries at block #227837?
At block 227837 , the coinbase TX
e35ca7413b61397a49551fea6ebb540988afcf4a2d0e750773d38eb11b138f40
has the following script:
...
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1answer
227 views
Where is the extraNonce in this coinbase transaction here?
https://blockchain.info/tx/c1669dabe1bcadf50c4b712e42da7b3d3152aef53752731b04a4f585dde6f5f2
The coinbase states this:
...
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1answer
130 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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1answer
66 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
195 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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1answer
166 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
122 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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1answer
45 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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3answers
60 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" ...
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1answer
56 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
489 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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1answer
326 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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3answers
372 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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1answer
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 ...
0
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1answer
497 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
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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
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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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1answer
716 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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1answer
336 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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1answer
77 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 ...
4
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1answer
148 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 ...
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6answers
942 views
Possible to do recurring payments with Bitcoin?
I'm a developer and using the Coinbase Ruby API to attempt to build a Coinbase application. I'm still coming to grips with how it all works. My question is, is it possible to set up recurring ...
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1answer
136 views
What happens to the transaction using the coinbase transaction output of a block later considered stale?
As I understand it, a stale (orphan?) block is determined after it is out competed by its sister block. But I can't help but wonder what would happen to the coinbase transaction's output of the stale ...
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1answer
123 views
Why is the bytestring 0xaa21a9ed used as the witness commitment header in SegWit?
As per BIP 141, the witness Merkle root hash is stored in a scriptPubkey field of a coinbase transaction output with a header consisting of the 4-byte string 0xaa21a9ed. What is the reasoning behind ...
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1answer
78 views
Can a core wallet coinbase-transaction (generation transaction) be moved intact to a net new core wallet?
Can a core wallet coinbase-transaction (generation transaction) be moved intact to a net new core wallet?
Wanting to go through cautious steps to claim BCH but, I hear a BTC coinbase-transaction when ...
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1answer
273 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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0answers
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How generate a hex string for a block
I have written this code to create and submit a new minned block to the bitcoin network:
unsigned long magic_number = 0xD9B4BEF9;
unsigned long block_size = 89 + (strlen(coinbase_transaction)-1) +...
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2answers
2k views
How create / generate a coinbase transaction for a new block?
I am coding a miner program with C, and right now I need some info of how create / generate a coinbase transaction to add to the block before submit it to the bitcoin network. Someone can indicate any ...
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1answer
3k views
Unable to create raw transaction with json-rpc command
I am trying create a coinbase transaction with the command:
{"jsonrpc": "1.0", "id":"jsonrpc", "method":"createrawtransaction", "params":[{"txid":"...
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1answer
250 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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1answer
426 views
How does bitcoin reward who find the block?
After getting the getblocktemplate, hashing it, finding a solution and generating the proper message to submit to the blockchain, if i ever solve a block how does the network knows it was me and ...
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1answer
3k views
Why do miners seem to be using consecutive letters for the Coinbase transaction text?
If you look at coin.dance, it looks like the coinbase transactions text start with consecutive letters. For example, block 478529 starts with "AM" and 478530 starts with "BM" and 478531 starts with "...
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2answers
578 views
SegWit witness commitment merkle root location
BIP 141 defines the commitment structure here
What i am unsure about is the location of this data. I know it will be in scriptPubKey.
Does this mean Coinbase tx will have more than one output?
Also is ...
