Questions tagged [coinbase-transaction]

The "coinbase transaction" is the transaction inside a block that pays the miner his block reward.

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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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 ...
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Weird script stack entries at block #227837?

At block 227837 , the coinbase TX e35ca7413b61397a49551fea6ebb540988afcf4a2d0e750773d38eb11b138f40 has the following script: ...
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Where is the extraNonce in this coinbase transaction here?

https://blockchain.info/tx/c1669dabe1bcadf50c4b712e42da7b3d3152aef53752731b04a4f585dde6f5f2 The coinbase states this: ...
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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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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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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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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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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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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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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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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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How to read the transaction of a block?

Given this example block (it's the genesis block by the way): ...
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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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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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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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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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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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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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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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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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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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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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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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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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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}]' '{"...