Transactions are signed messages regarding the transfer or generation of bitcoins. They are broadcasted through the network and, if accepted, integrated in the blockchain.

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Service that displays how many inputs/outputs there are in the blockchain?

Ideally, I am looking for a service like http://statoshi.info/, but one that displays the real-time number of inputs and outputs in the blockchain. Note that I am not looking for information on the ...
2
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1answer
16 views

How can I request payment to a set of addresses?

I am building a payment processing service where a single payment may be split among multiple individuals. While it would be possible for me to write the service in such a manner that a customer pays ...
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17 views

NBitcoin - get Transaction for address

I am making BTC wallet. My current task is getting all transactions for address. Is there anyone who can help me figure it out? I would really don't like to dig in blockchain or something like that. ...
4
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2answers
108 views

Why are transactions separate in a block?

I'm just getting started looking at bitcoin and it's protocol, so this might be an incredibly stupid question. Why does bitcoin have a separate concept of transactions? Wouldn't it be better for each ...
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0answers
6 views

Multiple transactions from a single wallet in one block [duplicate]

I am trying to understand how it would be (and if it is) possible for a single wallet address to have more than one transaction in a single block? Does a previous transaction of a wallet address need ...
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1answer
43 views

Can you include a signature in a bitcoin payment?

I know you can use the bitcoin client to sign messages (for which you own the private key) and verify messages from other public addresses. But can you actually embed a signed message into a ...
1
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2answers
104 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 ...
1
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1answer
58 views

Bitcoin how to get X value from Y

How to get X value from Y? ECDSA x,y coordinate validity verification doesn't seem to work X = 0x79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798 Python code, p = ...
0
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1answer
17 views

Is it possible to execute a CLTV transaction in bitoin core 0.11 console?

The title says it all. How can one perform a op_checklocktimeverify transaction using bitcoin core? I've searched around and I've found a few repo's on github but nothing about how to do it in the ...
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1answer
33 views

Why new public key for every new request?

I created Bitcoin accounts using different clients but all clients I tried prompt for new public key for each request. My question is shouldn't be the public key one's identity which one should be ...
0
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3answers
41 views

How to monitor the blockchain for new blocks

I want to scan new transactions as they are added to the block chain. Does anyone have a suggestion on how to do this. Are there any APIs that allow for this? Or is there a way to directly tap into ...
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2answers
16 views

How large is the current utxouts set

There was a website which shows statistics about the size of the set of all unspent transaction outputs. I can't find it any more.
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1answer
33 views

How to return change (utxo - inputs) to output address?

I've been learning to create bitcoin transactions for 3 weeks now, but keep paying the entire unspent_outputs - inputs as fees, even if the transacted amount was like 1/100 th of the outputs. How do I ...
0
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1answer
57 views

Transaction never confirmed over 2 days [duplicate]

I did a transaction from my bitcoin core wallet. The transaction 6263452f635713e60f83d45fe41b1c9ba3b5f5e3af664778bf18a05b15cfde06 has not confirmed, and it is now over 48 hours since I made the ...
0
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0answers
16 views

I am new to Bitcoin. Can you see why I fail to broadcast my transaction?

I'm new to bitcoin, and I can't understand how to construct a transaction. My problem is not with the code, but with bitcoin itself. Concepts like unspent_output are new to me. The example below ...
2
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1answer
52 views

Does an OP_RETURN script always need another output within the transaction?

I was reading this: Explanation of what an OP_RETURN transaction looks like and I wondered if the second output "value" : 0.00200000, was at all necessary. Can I just have a OP_RETURN with a 0 output ...
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1answer
24 views

BIP65: “replacing ntimelock entirely”?

BIP65 discusses replacing the ntimelock field with the new CHECKLOCKTIMEVERIFY OP code: As an aside, note how if the SignatureHash() algorithm could optionally cover part of the scriptSig the ...
3
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1answer
36 views

Release A Bitcoin From Multi Sig Address?

I just made a multi sig address from 3 address bitcoin and the result from that is 3Gf18oGoTaNCW38dVKe2ygNpUvUJmg6TY9 and i want to know how i can release the bitcoin ?
3
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3answers
106 views

Transaction without fee

If i want to make a transaction and sent it without fee how long it will be getting conf ? And my friend told me it will take more than 1 day. Can anyone here explain to me why it can be happen ?
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2answers
29 views

Versions of protocols for BTC and TEST?

I'm dorking around with creating a TEST transaction using libbitcoin's bx command. Besides setting the inputs and outputs, the bx tx-encode sub-command allows one to specify lock_time and version. ...
0
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0answers
51 views

Transaction broadcasted to the Bitcoin network but not in my mempool

I use armoryd (0.93.1) to send transactions in the testnet Bitcoin network with the three calls: 1. createustxtoaddress 2. signasciitransaction 3. sendasciitransaction The calls are all successfull, ...
0
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1answer
19 views

Unable To Find Transaction Outpoint

I'm working on a project that involves constructing raw transactions and signing them locally before pushing to the network. I keep getting Unable To Find Transaction Outpoint ...
2
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0answers
41 views

How can a miner choose which transaction to include in the next block?

This question is not a duplicate of Can miners choose which transactions to mine? Everybody seems to agree on the fact that miners can select which transactions they are mining. But I can't find a ...
0
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1answer
38 views

What is the mechanism of determining the transactions of a new block

I am newbie in the Bitcoin field. I have read about the transactions, blocks, blockchain and other materials. As I know, when a new valid block is found and announced by a user, other users start ...
0
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3answers
97 views

How to pay no fees?

Is there any API where I can create some addresses and making a transaction beetween them just once a month without paying fees? Or if you can recommend me somewhere with a fee under 5000 satoshis it ...
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2answers
66 views

transactions traffic jam possible?

or there is security from that?
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1answer
39 views

How do I find out what block a transaction is in?

I'm trying to do research on the age of transaction outputs at the time they are spent. I'm running bitcoind on my computer. I have transactions indexed with txindex=1. I want to take a given TXIN and ...
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0answers
16 views

account id & bitcoin amount & message ?-> show website content

I am planning to make an website / wordpress plugin. Site will ask visitor's account id. Site will show content only if a bitcoin transaction with specified account id & bitcoin amount & ...
0
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1answer
33 views

Transaction for real use / transaction for changin Bitcoin in other currencies?

How can I calculate the ratio between this two type of bitcoin transaction? Is it correct divide the total volume USD of the data at this link: ...
5
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3answers
151 views

Are loans with enforced repayment possible on the blockchain?

Are loans with interest possible in Bitcoin, such that repayment is enforceably encoded with Bitcoin Script on the blockchain from the establishment of the lending contract?
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0answers
20 views

dual-sig wallet with upper limit on one of the keys (for Basicincome.co)

a user might want to authorise an app to send transactions from their wallet, but with an upper limit. examples: subscription to services. auto-billing. micropayments (like BitTip, or CoinAwesome). ...
0
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1answer
59 views

blockchain.info transaction timestamps set into the future

There seem to be some irregularities with Blockchain.info's transaction timestamp (aka Received Time) for a set of blocks. The transaction times are recorded with unix timestamps well into the future ...
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42 views

Any bitcoin transaction to get S1 and Z1 and R value script need

bitcoin transaction to get S1 and Z1 and R value script need Need script that gives bitcoin translation to S1 and Z1 and R value like below link ...
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1answer
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converting RUBY script into PYTHON ( Recovering private key when someone uses the same k twice )

require 'ecdsa' public_key_hex = '02a50eb66887d03fe186b608f477d99bc7631c56e64bb3af7dc97e71b917c5b364' msghash1_hex = '01b125d18422cdfa7b153f5bcf5b01927cf59791d1d9810009c70cd37b14f4e6' msghash2_hex = ...
0
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1answer
47 views

What does this transaction mean?

First things first, I'm a newbie in everything related to bitcoins. I'm analyzing a few tens of addresses checking which ones have received payments, and one of them is the following: ...
0
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1answer
50 views

How many confirmation do i have to wait before i can spend the inputs I already received?

Can I spend Inputs with 0 confirmations?? If I could, are there some restrictions?
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0answers
62 views

Same identical R value of all transaction not provide corresponding privatekey

ECDSA Signature and the “z” value from above link learn calculation of z value and to get private key https://blockchain.info/tx/9ec4bc49e828d924af1d1029cacf709431abbde46d59554b62bc270e3b29c4b1 ...
2
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1answer
26 views

Auto formatting data into sendmany command

Apologies for the newb question. But what's the best way to convert data on spreadsheet (lists of addresses and corresponding amounts to be sent), into a format suitable to be entered as a sendmany ...
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2answers
63 views

Setting up a basic test transaction for p2p donation web app - API recommendation

My question relates to the use case of trying to build a simple payment flow where one user (a donor) can donate directly to another user (a recipient) with Bitcoin. To begin with, I would like to ...
13
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0answers
204 views

Have any SPV users lost money because they accepted forged bitcoins?

I'm making a list of real-life examples of occasions where bitcoins were lost to various known attacks. One of these known attacks is that lightweight (SPV) wallets can't verify whether a transaction ...
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2answers
55 views

Is it possible to have a single input or output with multiple addresses

I've seen in more than one Blockchain API provider's specs where the transaction inputs and outputs are in the following format: addresses: ARRAY The address (or addresses in the case of multi-sig) ...
0
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1answer
73 views

Two identical R value finding z value from two transaction

tx1 from the trans1 i got Input Scripts 30450220262e481b6d8905b5adba67aff05eb8261501b0a9434c0b7f043d00cf8d23c91b022100bf82c0d212f30d3a0599e9b879516d762eaf5688ab83787cf470e99af5a6917101 ...
0
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1answer
77 views

same R value is used for two different addresses? finding z1 and z2 value and privatekey

txid1 txid2 input script 1 304502206bcc247f1259262b4035bfa84f0397a69f69baa01659daaf94fe1164b650c86a022100a044b38e8264a1c928ddd28b4657aa7109d1ea30e911208c7ce57abcb1451fe601 ...
2
votes
1answer
102 views

Can I have multiple OP_RETURN outputs in one transaction?

I am wondering if I can inject multiple OP_RETURN outputs in one transaction?
0
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1answer
22 views

Bitcoins send out after syncing wallet [duplicate]

Good day, can someone maybe help me. I just opened my wallet today after I exported it to a private key and incrypted it (Multibit wallet) and more than half of my coins has been send out to an ...
5
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2answers
201 views

How do I uniquely identify a transaction (to protect against malleability)?

Transactions I broadcast can be malleated by anyone watching the mempool (more info here). This rules out using txid for transaction identification. How can I identify my transactions to make sure ...
2
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1answer
42 views

Do all implementation of Deterministic RFC6979-compliant ECDSA signatures generate the same signed transaction given the same data?

So if I were to create the same transaction using bitcoinjs and bitcoinj, the end result of the signed transaction would be the same with both libraries, is that correct?
4
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1answer
66 views

bitcoin two identical R

Blockchain transaction id 30440220d47ce4c025c35ec440bc81d99834a624875161a26bf56ef7fdc0f5d52f843ad1022044e1ff2dfd8102cf7a47c21d5c9fd5701610d04953c6836596b4fe9dd2f53e3e01 ...
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0answers
30 views

Is this pattern a tracking method or just a Bitcoin wallet making change to itself?

While following a particular transaction from a donation received in 2011 I noticed a pattern in the block chain. The entity donating would send .001 to an address and the remainder of the wallet ...
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1answer
86 views

Bought a bitcoin, sender said it was sent, not showing in blockchain or wallet. Where is it?

So I bought a full btc off of localbitcoin with amazon giftcard code. I sent the code and clicked that payment was completed. It's been about 2 hours. About 1 hour since he said that he sent the ...