bitcoin whitepaper) which can help you understand what makes SHA-256 Proof of Work the most trusted strongest PoW algorithm among cryptocurrency advocates. I don’t need to cover things like hashing, peer-to-peer network, Proof of Work, vinand vout in bitcoin transactions, etc., as there are plenty of resources online (e.g. The Internals of delayed Proof of Work (dPoW) The Bitcoin-as-timestamp-server solution for alternative blockchains later evolved to become “delayed Proof of Work” (dPoW) and was the first thing coded in the Komodo cryptocurrency project in late 2016, when Komodo was first forked from the Zcash code. One post/thread on this forum from James is about “Using BTC as time sequence server to allow cross chain atomic swap and increase security of altchain” ( link), in which he explained his idea of how Bitcoin can be used to secure other alternative blockchains which aren’t secured with as much hashing power as Bitcoin is, regardless of which method of security that blockchain is using to secure itself on its base protocol consensus level. While many other cryptocurrency forums or social media platforms weren’t as appreciative of jl777’s work, the bitco.in forum was wise enough to give a dedicated space to jl777’s bitcoin code iguana on its forum, where for some time James posted his early research as he was progressing. And as per December 2nd 2018, the total market cap of all cryptocurrencies is over 135 billion dollars, and many of the top cryptocurrencies are now worth tens or hundreds of dollars per unit. As you can see in June 1st 2014, the total market cap of cryptocurrency was about $ 8 billion dollars, and the value of many of the top cryptocurrencies at that time were just a few cents or even less than a cent. Origins of delayed Proof of Work (dPoW)īack then, jl777 predicted that the days were not far off when Proof of Work blockchains with small levels of hashing security would be attacked as the market value of those blockchain increase over time. As he was learning and coding, he usually was sharing much innovative knowledge with the SuperNET community and pointing out the many shortcomings of Bitcoin, places where the code could be improved a lot more. I remember the days of 2015–2016 when jl777 (James Lee) was working on the SuperNET code, programmed in the C language, in which James was both creating a Decentralized Exchange solution as well as learning the core internals of Bitcoin blockchain architecture by re-coding it himself. The fields in the second table correspond to the top-level properties found in the array of blocks in a Logseq export.It’s almost the end of 2018, and this year we have witnessed many 51% attacks ( Double Spending attacks) on various Proof of Work (PoW) based blockchains. Following are SQL statements to create two tables in Postgres:\n- Create table to store Logseq exports create table export ( id bigint generated by default as identity primary key, inserted_at timestamp with time zone default timezone(\u0026#39 utc\u0026#39 ::text, now()) not null, name varchar(255) not null, type varchar(255) not null, size bigint not null, last_modified bigint not null, data jsonb not null ) - Create table to extract export page blocks create table page ( id uuid primary key, \u0026#34 page-name\u0026#34 text, properties jsonb, format text, children jsonb ) The first table is for uploading JSON data and related metadata, and the other is going to be used for storing extracts of the data. However, we want to define our tables in code so their creation can be repeated without having to remember how it was done. The endpoint is configured to extract meaningful file metadata, parse the JSON inside the file and insert them into a table named export in Postgres, which we\u0026rsquo ll create next.\nDefine Tables in Postgres Since we\u0026rsquo re using Supabase creating tables in Postgres can be achieved using the table editor UI built for the purpose. You will need to install it as a dependency in your SvelteKit project in order to be able to import it as shown in the page endpoint above. [ Here supabase is the supabase-js client.
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