https://jeiwan.net/tags/bitcoin/ Recent content in Bitcoin on Going the distance Hugo -- gohugo.io en Wed, 22 Jan 2020 00:00:00 +0000 https://jeiwan.net/posts/programming-bitcoin-network-4/ Wed, 22 Jan 2020 00:00:00 +0000 https://jeiwan.net/posts/programming-bitcoin-network-4/ Previous parts: Part 1 Part 2 Part 3 DISCLAIMER. In these blog posts I describe only significant changes I made to the code since the last part. There are also insignificant refactorings and improvements I make along the way and don’t explain them here for brevity. Please, check these links to see all the changes: Full code of this part: Jeiwan/tinybit/part_4 Changes since the previous part: part3…part4 https://jeiwan.net/posts/programming-bitcoin-network-3/ Tue, 03 Dec 2019 00:00:00 +0000 https://jeiwan.net/posts/programming-bitcoin-network-3/ Previous parts: Part 1 Part 2 DISCLAIMER. In these blog posts I describe only significant changes I made to the code since the last part. There are also insignificant refactorings and improvements I make along the way and don’t explain them here for brevity. Please, check these links to see all the changes: Full code of this part: Jeiwan/tinybit/part_3 Changes since the previous part: part2…part3 https://jeiwan.net/posts/programming-bitcoin-network-2/ Sun, 17 Nov 2019 15:29:48 +0700 https://jeiwan.net/posts/programming-bitcoin-network-2/ Previous part: here DISCLAIMER. In these blog posts I describe only significant changes I made to the code since the last part. There are also insignificant refactorings and improvements I make along the way and don’t explain them here for brevity. Please, check these links to see all the changes: Full code of this part: Jeiwan/tinybit/part_2 Changes since the previous part: part1…part2 Introduction So far, we built a very basic Bitcoin node that connects to the network and sends version message. https://jeiwan.net/posts/programming-bitcoin-network/ Wed, 30 Oct 2019 00:00:00 +0000 https://jeiwan.net/posts/programming-bitcoin-network/ Full code: Jeiwan/tinybit/part_1 Introduction This blog starts a series of posts dedicated to programming of the Bitcoin network in Golang. The goal of this series is to build a tiny Bitcoin network client that’s able to: Connect to a Bitcoin network (whether that’s mainnet, testnet, simnet, or a local network). Introduce itself to the network (what’s called “version handshake”). Get information about current blockchain state from a node in the network. https://jeiwan.net/posts/what-is-lightning-network/ Fri, 02 Mar 2018 16:58:56 +0700 https://jeiwan.net/posts/what-is-lightning-network/ Introduction As soon as the Bitcoin network started processing more-or-less significant number of transactions, it became obvious that the network is not scalable: the size of blocks is limited to 1 Mb, and since the number of transactions is growing, one day the limit will be hit and the mempool will start growing resulting in delayed transactions. This scalability issue gave birth to many Bitcoin clones, which pursued the goal of building a really scalable blockchain. https://jeiwan.net/posts/building-blockchain-in-go-part-7/ Fri, 06 Oct 2017 12:31:19 +0700 https://jeiwan.net/posts/building-blockchain-in-go-part-7/ Chinese translations: by liuchengxu, by zhangli1 Introduction So far, we’ve build a blockchain that has all key features: anonymous, secure, and randomly generated addresses; blockchain data storage; Proof-of-Work system; reliable way to store transactions. While these features are crucial, it’s not enough. What makes these features really shine, and what make cryptocurrencies possible, is network. What’s the use of having such blockchain implementation running just on a single computer? https://jeiwan.net/posts/building-blockchain-in-go-part-6/ Mon, 18 Sep 2017 13:02:26 +0700 https://jeiwan.net/posts/building-blockchain-in-go-part-6/ Chinese translations: by liuchengxu, by zhangli1 Introduction In the very first part of this series I said that blockchain is a distributed database. Back then, we decided to skip the “distributed” part and focus on the “database” part. So far, we’ve implemented almost all the things that make a blockchain database. In this post, we’ll cover some mechanisms that were skipped in the previous parts, and in the next part we’ll start working on the distributed nature of blockchain. https://jeiwan.net/posts/building-blockchain-in-go-part-5/ Mon, 11 Sep 2017 11:20:43 +0700 https://jeiwan.net/posts/building-blockchain-in-go-part-5/ Chinese translations: by liuchengxu, by zhangli1 Introduction In the previous article, we started implementing transactions. You were also introduced to the impersonal nature of transactions: there are no user accounts, your personal data (e.g., name, passport number or SSN) is not required and not stored anywhere in Bitcoin. But there still must be something that identifies you as the owner of transaction outputs (i.e. the owner of coins locked on these outputs). https://jeiwan.net/posts/building-blockchain-in-go-part-4/ Mon, 04 Sep 2017 11:32:39 +0700 https://jeiwan.net/posts/building-blockchain-in-go-part-4/ Chinese translations: by liuchengxu, by zhangli1 Introduction Transactions are the heart of Bitcoin and the only purpose of blockchain is to store transactions in a secure and reliable way, so no one could modify them after they are created. Today we’re starting implementing transactions. But because this is quite a big topic, I’ll split it into two parts: in this part, we’ll implement the general mechanism of transactions and in the second part we’ll work through details. https://jeiwan.net/posts/building-blockchain-in-go-part-3/ Tue, 29 Aug 2017 12:10:04 +0700 https://jeiwan.net/posts/building-blockchain-in-go-part-3/ Chinese translations: by liuchengxu, by zhangli1. Introduction So far, we’ve built a blockchain with a proof-of-work system, which makes mining possible. Our implementation is getting closer to a fully functional blockchain, but it still lacks some important features. Today will start storing a blockchain in a database, and after that we’ll make a simple command-line interface to perform operations with the blockchain. In its essence, blockchain is a distributed database. https://jeiwan.net/posts/building-blockchain-in-go-part-2/ Tue, 22 Aug 2017 12:42:19 +0700 https://jeiwan.net/posts/building-blockchain-in-go-part-2/ Chinese translations: by liuchengxu, by zhangli1. Introduction In the previous article we built a very simple data structure, which is the essence of blockchain database. And we made it possible to add blocks to it with the chain-like relation between them: each block is linked to the previous one. Alas, our blockchain implementation has one significant flaw: adding blocks to the chain is easy and cheap. One of the keystones of blockchain and Bitcoin is that adding new blocks is a hard work. https://jeiwan.net/posts/building-blockchain-in-go-part-1/ Wed, 16 Aug 2017 12:29:11 +0700 https://jeiwan.net/posts/building-blockchain-in-go-part-1/ Chinese translations: by liuchengxu, by zhangli1. Introduction Blockchain is one of the most revolutionary technologies of the 21st century, which is still maturing and which potential is not fully realized yet. In its essence, blockchain is just a distributed database of records. But what makes it unique is that it’s not a private database, but a public one, i.e. everyone who uses it has a full or partial copy of it.