Questions tagged [implementation]

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How to sign a 2-of-2 multisig address?

I want to implement 2-of-2 multisig in bitcoinj, and I implement the methods which are used to sign the first time and the second time. But there is a bug that using the same key for the first signing ...
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1answer
34 views

Error message still returned after transaction was indeed broadcast

I use bitcoinj to create the following method to broadcast a raw transacion in testnet, and I did see on bitcoin explorer that it has been broadcast. But even the transaction has been already ...
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1answer
36 views

Do payment channels have an address? And where are their transactions actually being written to?

In the Lighting Network or with micropayment it's possible to open up payment channels that basically work like a smart contract. At the beginning, the channel is funded by one or two parties with ...
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0answers
41 views

How to implement 2/2 multi-signature transactions with bitcoinj

I am using bitcoinj to implement a 2/2 multi-signature transaction. Now I want to use bitcoinj to generate a 2/2 multi-signature address and its corresponding Redeem Script through the public keys of ...
2
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1answer
68 views

Python implementation for LND path finding algorithm

The most common Lightning nodes use GO, C or Scala for their implementation. Is there any publicly available Python implementation for the path finding algorithm any of the most known clients use (LND,...
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2answers
43 views

What is a cryptocoin made of?

I want to know whether a cryptocoin is made of some piece of code or it is kind of a bill that says a person has transferred conceptual coin to another person when a transaction is published. If it is ...
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1answer
46 views

Implementation of getdata

I am confused about how getdata() is actually implemented at full nodes. Suppose a full node receives a getdata() request with MSG_BLOCK flag and a hash H of some block B. Then would it simply look ...
3
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1answer
212 views

Why was BIP34 (Block v2, Height in Coinbase) not implemented via the coinbase tx's locktime or nSequence?

At some point in 2011/12 miners started using custom mining algorithms ignoring the best practise to mine to a different new public key (hash) for each subsequent block. This lead to a lack of ...
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2answers
464 views

How to install Hard Fork of Bitcoin, such as Bitcoin Cash and Bitcoin Gold?

Just like the title, how do I install hard fork of Bitcoin, such as Bitcoin Cash or Bitcoin Gold? I would like to install Bitcoin Cash core in Ubuntu 16.04. It seems like there is not a single ...
1
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1answer
529 views

Bitcoin core multisig signing order

I have a technical question regarding the signrawtransaction function in Bitcoin core when signing a partially-signed transaction. I have tested different scenarios and signrawtransaction will always ...