Linked Questions

0
votes
2answers
607 views

I have unspent bitcoin in the blockchain [duplicate]

I made a transaction from a multibit wallet. It arrived in the blockchain and was confirmed thousands of times. However, the transaction is set to 'unspent'. Can I retreive this from the blockchain ...
58
votes
2answers
91k views

Can someone explain how the Bitcoin Blockchain works?

I'm trying to figure out how the blockchain works and how to read it via blockchain.info website. Is there a laymen way of explaining how the block chain works and how to read the blockchain to trace ...
10
votes
3answers
4k views

Why can't mining pools provide fake transactions within the generated blocks?

Suppose Alice wants to add a fake transaction where she receives X ammount of BTC. I understand that in order to add that transaction to the blockchain she would have to compete against all the other ...
8
votes
3answers
4k views

How do miners detect double-spending?

Assuming I spent 1BTC, then waited a few months and then spent it again. How is this detected? Do the miners go through the entire blockchain to assure the coin was never spent before?
-2
votes
2answers
4k views

how transactions of an address traced in BTC?

I'm a newbie, here is my understanding of how transactions are made and how we make sure how many BTCs an address own. if I didn't get it wrong, how many BTCs a address owned is confirmed by the ...
0
votes
1answer
560 views

Why do transactions send coins to the same address as they spent it from?

I often notice transactions such as: 364efe5a906de5971e242f9711008e58a5ab79f136a8044b66615e8662d35f09 Where funds from the address 3PU with 1.38 BTC are split to itself (1.35 BTC) and 37Ek (0....
0
votes
1answer
646 views

How can a pruned node be classed a full node without the full blockchain?

A full node is a node with the whole blockchain and is able to verify any new incoming blocks. A pruned node, is a node with only some of the blockchain, namely it has removed some of the older ...
0
votes
1answer
984 views

Determine inputs/outputs of a transaction before sending

I am attempting to build a working withdrawal system where users can withdraw funds in BTC. I am required to estimate the fee before allowing them to withdraw to include it in their payment. I was ...
1
vote
2answers
499 views

Does an Invalid Transaction persist in the mempool?

My basic understanding is that a transaction will continue to exist in the MemPool until it can be completed, (or eventually gets evicted due to the size of the MemPool). To me, this leads to a ...
1
vote
1answer
201 views

Can receiving money make a transaction fail?

Scenario: Alice has a wallet A1bz (let's say these are the first 4 characters of the private key in wallet import format so we don't have to deal with too many characters) with wallet address 1A1 and ...
0
votes
1answer
195 views

where do unspent outputs come from?

This post asks the same question: What is an "unspent output"? but the answers for me are completely incomprehensible, probably because I lack a key piece of knowledge. I have read every ...
0
votes
2answers
63 views

Can two or more transactions sent from the same address be mined in the same block in Bitcoin's blockchain?

Imagine a person Bob has 10 bitcoins in his wallet. He wants to send 5 bitcoins to Alice and another 5 bitcoins to Uncle Tom simultaneously (in separate transactions). Will both Bob's transactions be ...
1
vote
2answers
137 views

Is the probability of generating invalid blocks reduced by mining transactions unknown to others?

I've got a question concerning a possible mining strategy. I've not found any proof of the strategy, but it seems reasonable to me. If two mined blocks inserted in the block chain include the same ...
1
vote
1answer
145 views

How can a Bitcoin transaction be used multiple times (If it is so)?

My understanding is that a transaction is a transfer of value between Bitcoin wallets that gets later included in the block chain. So a Bitcoin transaction is used only once in my understanding.
1
vote
2answers
103 views

What does it mean by “many different transactions tied to a particular bitcoin address” in this context?

The context is on this section: “What if the input and output amounts don’t match?” of this page: http://www.coindesk.com/information/how-do-bitcoin-transactions-work/ I find it strange as it seems ...

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