bitcoin core – BitClout Opensource (REST) APIs for Blockchain queries. Share your talent. Help our Community

BitClout Blockchain Explorer: Paired with Bitcoin

I’m gathering a list of Bitcoin /Blockchain APIs/Web (REST) APIs that allow you to do basic blockchain queries through http(s) API calls, such as: getting the balance on an address, getting a list of transactions from or to an address, getting the details (i/o) etc. Where can I find more data? Github?

Is Intel Atom Processor better than dual core and Core2Duo

Just like what Kerosene said, better in term of what?

Intel Atom is a low-powered processor with a single core. Its prime advantage is that it uses less power than the Core 2 Duo chip that will enhances battery life. It is normally found in Netbooks as well as small form factor desktops.

A Core 2 Duo processor, has two processing cores for better performance, though it sucks up much more power than its Atom equivalent. For simulations and program intensive tasks I suggest you stick to go with a Core 2 Duo chip.

– Dynashox –

 

bitcoin core – the two miner type of reward

the definition of a block in the blockchain is
“A block records some or all of the most recent Bitcoin transactions that have not yet entered any prior blocks. Thus, a block is like a page of a ledger or record book. Each time a block is ‘completed’, it gives way to the next block in the blockchain.”
this is acceptable miners get a reward for proof of work(confirm transactions)
but what exactly do miners when say they have a process for creating a block(and get a reward for them)?
(In other words what exactly this process? Is it possible to remove it?)

product identification – Where is the Core of Unisystem?

I’m trying to expand the range of universal/generic systems I’m acquainted with, and took a look at Unisystem. I had a very superficial run-in with it in one of its licensed-franchise forms some years ago, and would now like to take a look at it in its pure, setting-agnostic form. But when searching publications related to the system, I am having trouble finding a book that would be the equivalent of a system core (similar to the role of Cypher System Rulebook of Cypher, the EABA 2.0 book of EABA, the Basic Set of GURPS, and the like).

What book should I look towards for acquainting myself with the system in its most basic, generic form?

I built a custom .NET Core distributed system with Docker, React, Consul and RabbitMQ. Would anyone

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bitcoin core – How difficult is it to find a hash digest beginning with at least twelve zeros?

How difficult is it to find a hash digest beginning with at least twelve zeros?

what i know is Difficulty is a measure of how difficult it is to find a hash below a given target.

The Bitcoin network has a global block difficulty. Valid blocks must have a hash below this target. Mining pools also have a pool-specific share difficulty setting a lower limit for shares.

and difficulty = difficulty_1_target / current_target

(target is a 256 bit number)

difficulty_1_target can be different for various ways to measure difficulty. Traditionally, it represents a hash where the leading 32 bits are zero and the rest are one (this is known as “pool difficulty” or “pdiff”). The Bitcoin protocol represents targets as a custom floating point type with limited precision; as a result, Bitcoin clients often approximate difficulty based on this (this is known as “bdiff”).

but can someone explain me how difficult is with 12 zeros?

sql – Como utilizar EF Core Code First no Azure Synapse

Estou tentando utilizar migrações para gerenciar esquemas de banco de dados com o Entity Framework Core e C# no Azure Synapse, quando executo o comando update-database recebo uma mensagem de erro conforme descrito abaixo:

Enforced unique constraints are not supported. To create an unenforced unique constraint you must include the NOT ENFORCED syntax as part of your statement.

Esse erro ocorre pelo fato do Azure Synapse não aceitar o uso de PRIMARY KEY sem que a mesma esteja acompanhada por NONCLUSTERED e NOT ENFORCED. O script abaixo funciona perfeitamente quando executado no msqlms:

CREATE TABLE dbo.sample_table
(
    c1 int IDENTITY(1,1) NOT NULL,
    c2 char(10) NULL,
    c3 datetime NULL
)

ALTER TABLE t1 ADD CONSTRAINT PK_t1_c1 PRIMARY KEY NONCLUSTERED (c1) NOT ENFORCED

Para incluir NONCLUSTERED pelo mapeamento do EF basta apenas definir IsClustered(false) conforme exemplo abiaxo.

public class ManifestationMap : IEntityTypeConfiguration<Manifestation>
{
    public void Configure(EntityTypeBuilder<Manifestation> builder)
    {
        builder.ToTable("Manifestation");

        builder.HasKey(prop => prop.Id)
           .IsClustered(false); // Include NONCLUSTERED 
        ...

Não encontrei nenhuma solução para incluir pelo EF o NOT ENFORCED.

Obs: Não tenho esse problema quando estou utilizando o Azure SQL Server, nem quando utilizo Sql Server instalado localmente, apenas no Azure Synapse (Sql Server DW).

Manually update core from 7.0 to 7.78 in one fell swoop

The latest update contains all of the updates before so going straight to the latest one should be okay and is what is usually recommended. Be sure to backup your site and test the backup on a dev copy.

You should update your contributed modules at the same time as some of them may rely on updated versions of Drupal (core).

Lastly and very importantly, there have been numerous security releases since the 1st release and some of them are quite bad so I would say you should probably assume your site is compromised. That’s 78(!) releases you’ve missed out on, including the infamous Drupalgeddon.

fa.functional analysis – Common core for unbounded operators

Suppose that $mathcal H$ is a Hilbert space representing some physical system, $H$ is the Hamiltonian for the system, and $A$ is some observable for the system, that is, some unbounded self-adjoint operator on $mathcal H$. How restrictive is the assumption that $H$ and $A$ share some common core? I believe this is the same assumption as saying that there is a dense subspace $M$ of $mathcal H$ for which $Hupharpoonright M$ and $Aupharpoonright M$ are both essentially self-adjoint operators. Is this an assumption that occurs naturally?