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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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 ...
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1answer
15 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?
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1answer
25 views

bitcoin two identical R

Blockchain transaction id 30440220d47ce4c025c35ec440bc81d99834a624875161a26bf56ef7fdc0f5d52f843ad1022044e1ff2dfd8102cf7a47c21d5c9fd5701610d04953c6836596b4fe9dd2f53e3e01 ...
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0answers
9 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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2answers
56 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 ...
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1answer
33 views

Erroneous blockchain transactions…more coins than I specified!

This isn't directly related to Bitcoin; rather this is related to Infinitecoin, however the technologies are virtually the same. The other day I sent 2,000 IFC from my wallet (Infinitecoin-QT for ...
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1answer
21 views

Public API to verify transactions to a unique address as they occur?

I'm creating a WordPress plugin for bitcoin donations. I want it to behave similar to the checkout process for many bitcoin shopping carts, where the QR code is displayed then once the user scans and ...
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1answer
25 views

I have a merchant that only takes bitcoins can I just put the correct amount in the wallet and then pay them?

I want to pay a merchant who only takes bitcoin payments. Do I create a wallet and only put in the amount of the price and pay with it? If so then what do I do after I send it to the merchant?
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16 views

Which payment methods are suited for bitcoin trading? Which are sufficiently hard to reverse?

I'm aware of this list: bitcoin wiki - pament methods Unfortunately the list is incomplete and outdated. So far I've found SEPA, Okpay, Cash deposit (US) Can someone add to that list? I'm ...
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2answers
47 views

How instantaneous is a Bitcoin transaction?

How quick does a bitcoin transaction happen? (assuming that both parties are online at the time) I read somewhere on the Internet that it's not recommended to accept a bitcoin payment right away ...
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2answers
19 views

Why is pycoin getting the incorrect output address?

I am using pycoin version 0.52 from pypi and it is getting the wrong output address from a transaction. Code # testnet txid and corresponding rawtx # see ...
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48 views

Possible to auto-send one btc transaction every x seconds to same btc address?

is there a wallet/app out there that would do the following, or would it require bespoke script development? Automatically send a btc transaction to a btc address at fixed time intervals eg every ...
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1answer
23 views

Can a transaction be conditioned on signing another transaction?

I was thinking around http://lightning.network/ . My problem is Alice sending coins to Bob via Eve: A -- tx1 -> E -- tx2 -> B Is there a way to condition tx1 on Eve signing tx2?
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1answer
36 views

Pairing pattern of txids in merkle tree

For constructing the merkle tree txids are paired and hashed. ¹ But how are these txids paired? Does it happen chronologically or is there a certain pattern of pairing?
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2answers
75 views

How to check BTC transaction when buying face to face?

I have never bought bitcoins face to face. Don't have iphone/ipad and therefore I would need answers on the following question: What do I need to have on my cell phone in order to provide seller my ...
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1answer
40 views

Transaction inclusion into block

What are reliable and good sources for understanding the procedure of transaction inclusion into a block? Problem outline: Given, there are multiple peers - let's say 5 - in a test network, where 3 ...
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2answers
76 views

Calculating “total received” and balance by an address

This is something which I think should be simple but it's driving me crazy. See for example this list of transactions associated with an address: ...
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1answer
31 views

Transaction too large error

I have over 1400 small transactions in my wallet that add up to a little over 0.2 BTC. I am trying to send them, but keep getting a transaction too large error. I have tried to set a custom ...
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0answers
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How to sign a transaction using BitcoinJ

I am having problem signing the transaction using BitcoinJ library without the Wallet instance, I only have the Transaction class instance and the ECKey in order to sign the transaction. Is there a ...
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1answer
96 views

Is it possible to use Selfish Mining to steal bitcoins?

Is it possible to use the Selfish Mining algorithm to steal bitcoins?
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1answer
69 views

What goes in to the message of a transaction signature?

I'm trying to create my own transaction from scratch, just to see how it works. I'm currently working backwards, and I'm stuck on the signature of a transaction... Here's my unsigned transaction: ...
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0answers
14 views

What is the meaning of sequence number in inputs? [duplicate]

I can't understand the meaning of the sequence number for this 2 inputs transaction, does this number have any sense ? and if so how could it be the same for two different txid ?
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96 views

bitcoin legally avoiding taxes

I was wondering is there anywhere in the world where you can trade bitcoins while legally not paying tax, and that will stay in a state of not taxing bitcoins for a while? I'm hoping to find a ...
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1answer
56 views

Without using something like Bitcoin Script, how NEM verify the transaction?

From NEM's thread in bitcointalk, it mentions: NEM doesn’t use so-called “scripts” aka predicates. I understand how Bitcoin use the script to verify the transaction. May I know where I can read ...
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Cannot create a transaction

I am trying to create a transaction on the bitcoin testnet, using bitcore: Error Message : SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data Here is my code: ...
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1answer
128 views

Is it possible to reject a bitcoin payment?

Say someone sends bitcoin to an address. It is later determined that those incoming funds are tainted and the recipient wants no association. What is their recourse?
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4answers
157 views

sent-to address

Premise: I'm quite new to all this bitcoin thing. After experiencing some problem with a bitcoin transaction, I made few attempts with small quantities (0,0001). In particular, I've sent 0,0001 to ...
2
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1answer
51 views

Using Bitcore API for Escrow

Has anyone experience using the Bitcore API for Escrow purposes with node.js? I assume, you'd need to create a new a address, then somehow create a new transaction using the newly created address, ...
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2answers
35 views

How to get the input address from an txid with bitcoind

I want to get the input addresses of a transaction with a known id. If I use getrawtransaction I get something like: "vin" : [ { "txid" : ...
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1answer
35 views

How do SPV get their transactions after being offline?

SPV nodes rely on their peers to send them transaction data that is relevant to them. When an SPV node sets up a bloom filter with one of their full node peers, doesn't that only tell the full node ...
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1answer
13 views

What is A matching transaction in the pool validation?

I'm reading "mastering bitcoin" and got into transaction validation. Can you explain to me what is the meaning of "A matching transaction in the pool, or in a block in the main branch, must exist." ?
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145 views

If Bitcoin is traceable, how bitcoin scams are exist?

Let me write an example. A hustler give some people his bitcoin address and these people transfer some bitcoins to his wallet. According to the term, which says that bitcoin transaction is traceable ...
7
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2answers
104 views

What technical reasons exist for off-chain transactions?

I'm trying to get a grasp on off-chain transactions, as they seem more common than I initially realized but they are not the way that I originally perceived bitcoin being used as an outsider looking ...
2
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1answer
54 views

Is it possible to change an output of a partially signed transaction?

In step 5 of the procedure described in https://en.bitcoin.it/wiki/Smart_Property#Theory, the buyer creates a partially signed transaction. Will the seller be able to change an output prior to signing ...
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70 views

transfer Bitcoin without synchronizing Bitcoin core

I installed Bitcoin core recently but its not synchronizing right now. I sent one address from file menu like this below to one of my friend and he is send me some Bitcoin ...
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1answer
25 views

How to set TXID in rawtransaction?

My question is if I can set the TXID in a raw transaction and send it after it with 'sendrawtransaction' (from the qt console)? If not, is there a way to do it? And if there is a way, does it means I ...
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2answers
56 views

How to create the <sig> <PubK> part in “scriptSig”?

I've decoderawtransaction and see in the vin part a "scriptSig" ,which I believe to be the "unlocking script" . Assuming I have the private key in a paper wallet and someone send me transaction to ...
0
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1answer
38 views

Unable to receive/preview funds due to un-synced wallet [duplicate]

I bought bitcoins and sent them to the wallet, however the wallet is not synchronized and as a result I cannot see my bitcoins. Will I be able to see them as soon as the synchronization process ...
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1answer
52 views

Using bitcoind JSON-RPC, how to get transaction from input address?

I have an address from which all unspent txouts were used in a single transaction. How can I find out what transaction was that? In my node instance, listtransactions will not list addresses that ...
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2answers
59 views

How do I get to the value in the 'scriptPubKey' part of the transaction ?

How do I get to the value in the 'scriptPubKey' part of the transaction ? The sender knows only the address (1A3XjcuZmcszX2tGoVn1TrMNchuHwdAxZV) so how did he get into ...
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1answer
47 views

Check if a user pays another user for bitcoin website

I am creating a bitcoin website. I would rather the bitcoin didn't go through my website to prevent any security issues. What happens is one user pays another user, and when that happens my website ...
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1answer
29 views

Meaning/Derivation of 32 byte TxID hash

A largely abstract question (set) I've tried to answer for awhile is the nature of a TxID (32 byte hex Transaction ID hash). First and foremost, I certainly understand the main function if this ...
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1answer
23 views

RippleAPI Prepare Payment Paths object

When using ripple API Prepare Payment method. GET /v1/accounts/{:source_address}/payments/paths/{:destination_address}/{:amount} I am struggling with how should I understand paths part of response? ...
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2answers
52 views

Is an unencrypted wallet secure if bitcoind is not accepting RPC calls?

I'm interested in setting up a P2Pool node (which requires running bitcoind) to run a little mining pool for myself. Before you ask, nope I'm not even trying to break even, I know I'll lose money on ...
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How Does Bit Coin Discovery Work? [duplicate]

According to the original paper on Bit Coin transactions are broadcast to a number of nodes as are Proofs of work. My question is if Bit Coin is decentralized how are transactions and proofs of work ...
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2answers
49 views

Specific instance of Tx using a malformed null byte vector for P2SH; insight req

From Biteasy's API for TXID fccf964964c34994e5dbbb9ff7f914159b524b0831f6eea12255aa424b39090e we can see the following info regarding inputs (for a P2SH Tx): "script_sig_string": "[] ...
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2answers
105 views

Can one wallet send/receive bitcoins from/to multiple sources simultaneously?

Let's say for example I put my public bitcoin address on a website for donations and multiple people for around the world deposit bitcoins simultaneously to that same wallet: Will all deposit ...
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2answers
100 views

Why can't we expire two year old transactions?

I understand any output in blockchain can be left un-redeemed forever. But If we expire all transactions that are more than two years old (specifically after some number of blocks), there are some ...
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3answers
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Receving donation on a bitcoin address and security issues of reusing the same address

I am running a blog and would like to receive donation from my followers. So I should add a bitcoin address on my Support me page! But on bitcoin.it, it is recommended to never reuse addresses (not ...
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1answer
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Why can I only see the balance of my wallet and not the one of each of my receiving addresses? (Multibit)

I have some troubles to understand the logic behing addresses and wallets. I use Multibit to manage my BTC. I have one wallet with 5 receiving addresses. I have transfered from an exchange website ...