Importing a private key (paper wallet) to Bitcoin Core client, while offline, is not actually importing

Trying to import a paper wallet to bitcoin core, while not having a fully synced node.
I’ve used:
importprivkey 1Lblablablablabla “MyLabel” false
It returns “null”, which I understand means successful import.

But then when I use dumpprivkey with the associated public address, it says there is no private key associated with the address.
I also look in the GUI and can’t find any clue as to where that private key has been imported.

So basically the wallet is not giving me errors of failed import, but also not actually importing the private key.
What should I do?

What is the formula for calculating the private key? resued R value

What is the formula for calculating the private key? I want the equation in detail to try to solve it on cocalc

I want an equation to extract the private key from two different addresses I have tried
K ((z1 * s2 – z2 * s1) / (r * (s1-s2)))
And it didn’t work

These are the data for the transactions

tx/ 952730ab31f6e9949343bc186484f95168fa6842489e89b5b48500c54818c683


“sigR”: “6fcf15e8d272d1a995af6fcc9d6c0c2f4c0b6b0525142e8af866dd8dad4b”,
“sigS”: “7b4bde105608e96da63b54288a5dae961fc074008f4fc9c79d4e486fb9d4bc0b”,
“sigZ”: “c49cc0d0ef2a72386e63d28a319e58dc0258dacedf9f7858619a615bb20cd8f6”,
“pubKey”: “02a0d204d69210b21d79c60b506b27259c314f0c64ea24d419696722ea285db1f1”,

tx/ cf7a5114e0036d98c531538885b4c906a47d74a615721d620b3c53d4f7c43856


“sigR”: “6fcf15e8d272d1a995af6fcc9d6c0c2f4c0b6b0525142e8af866dd8dad4b”,
“sigS”: “78f05c60ebd2befb89a62e438c17ace056d6a450de5c6b1a3eff8fb5080928c5”,
“sigZ”: “3d9f9cf2b32fac5966773e0f1697f1601218c72c1a908cf11278b30da2b6a0ed”,
“pubKey”: “0482ba73f4c09accb62b982ab2b29848a292e3380e062c03c03a5880a918f937ea28f2b7da09deb91c2358414ffd31f8daacc60a5e2f9cafb8b9d212f8a888c7e8”,
“N”: 0

Coinbase tells me to send from electrum to my private key?

Tl;dr: what you have is

  • a seed-phrase for a Bitcoin wallet (where you look after your own cash)
  • a receiving address associated with a Coinbase account (where you let Coinbase have ownership of your cash in return for an IOU)

You don’t have a private key (and you don’t need one so long as you keep that seed-phrase written down somewhere safe – not on a computer)

I received 12 keywords

That is almost certainly a seed phrase, also called a recovery-phrase or backup-phrase.

Your master private key is generated from that seed phrase.

In a hierarchical deterministic (HD) wallet, that master private key is used to generate many pairs of private keys and public keys.

For the most common types of Bitcoin transaction, a public key is used to generate a bitcoin address to which money can be sent.

and a hash (starting with 17) which I always thought was my bitcoin key.

A string of around 32, 33 letters and digits starting with a “1” is an old-style of Bitcoin address that is still valid and popular. It is a Bitcoin address, not a private key.

To see some examples look at some reference pages such as

Note that the same private key can be shown to you in several different ways (encodings, display-formats).

From the above you should be able to reassure yourself that what you have is a 12-word seed-phrase for your wallet and an unrelated bitcoin address for your Coinbase account.

Getting Foreign Key value as NULL Postgresql using JPA

I’m facing issue with foreign key value getting as null using below piece of code.

@Table(name = “PAYEE_DETAILS”)
public class PayeeEntity {

@GeneratedValue(generator = “gen”, strategy= GenerationType.SEQUENCE)
@SequenceGenerator(name=”gen”, sequenceName=”PAYEE_SEQ”, allocationSize = 1)
@Column(name = “ID”, nullable = false)
private Long id;

@OneToMany(cascade = CascadeType.ALL,
        orphanRemoval = true, mappedBy = "payeeEntity")
List<PayeeFieldEntity> payeeFieldEntities;

@Column(name = "REFERENCE_NUMBER", nullable = false)
private String payeeId;


@Table(name = “payee_field_details”)
public class PayeeFieldEntity{

@GeneratedValue(generator = "gen", strategy= GenerationType.SEQUENCE)
@SequenceGenerator(name="gen", sequenceName="PAYEE_FIELD_SEQ", allocationSize = 1)
@Column(name = "ID", nullable = false)
private Long id;

@ManyToOne(fetch = FetchType.LAZY,cascade = {CascadeType.ALL},optional = false,targetEntity = PayeeEntity.class)
@JoinColumn(name="REFERENCE", nullable=false,referencedColumnName = "REFERENCE_NUMBER")
private PayeeEntity payeeEntity;


ID integer,

ID integer,

algorithm – Assessing BigO/small o for forming a dynamic dictionary based on searched key and values pair

I am trying to create a dictionary with a file containing text based on a matched pattern. Lines containing key_str should become keys and subsequent lines not matching key_str should become values and get associated with keys in the dictionary. so i have below code working: But I need help and getting the Big O analysis. How could i say my logic is worth case, Best Case or good case? Also, which case is small o and which is big O

File: file2dict.result-soa1




my_dict: {ml1: ('/var','/home'), cpuml2: ('/var','/home')}


import os
homedir = os.environ.get('HOME')

key_str = "ml"
my_dict = {}
val_list = ()
key = ''
with open(homedir + '/backup/file2dict.result-soa1') as file2dict:
    for line in file2dict:
        words = line.split()
        for aWord in words:
            if key_str in aWord:
                if key:
                    my_dict(key) = val_list
                    val_list = ()
                    key = aWord
                    key = aWord
    my_dict(key) = val_list

sql server – Speed up Key Lookup (clustered)

I have a slow query in Sql 2017. Key lookup (Clustered) is taking 62%. There is also an Index Seek (nonclustered) taking 30%.

Is there anyway I can speed this query up?

exec sp_executesql N'SELECT TOP(@__p_4) (v).(County), (v).(Community), (v).(DataProvider), (v).(Site), (v).(Latitude), (v).(Longitude), (v).(Elevation), (v).(Instrument), (v).(MonitorId), (v).(ParameterId), (v).(Parameter), (v).(MeasurementStartTime), (v).(MeasuredValue), (v).(AdjustedValue), (v).(Units), (v).(AdjustmentDesc), (v).(LowerLimitCheck), (v).(UpperLimitCheck), (v).(RepeatingValueCheck), (v).(SpikeCheck), (v).(QualityPreliminary)
FROM (vw_DownloadDataSubhourly) AS (v)
WHERE ((((v).(CountyId) = @__Parse_0) AND ((v).(MeasurementStartTime) >= @__start_1)) AND ((v).(MeasurementStartTime) <= @__end_2)) AND (v).(ParameterType) IN (''PM2.5'')
ORDER BY (v).(Site), (v).(MonitorId), (v).(ParameterId), (v).(MeasurementStartTime)',N'@__p_4 int,@__Parse_0 int,@__start_1 datetime,@__end_2 datetime',@__p_4=750000,@__Parse_0=34,@__start_1='2019-10-01 00:00:00',@__end_2='2020-12-31 23:59:59'

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certificate authority – Autorenew not working when setting up key based renewal – Cep/CES

I am trying to configure Key Based renewal using WES to support autorenwal of certificates in workgroup computers and untrusted domains.

I have configured CEP (Certificate Authenticatoin, Key Based Renewal) and CES (Certificate Authenticatoin, Key Based Renewal, Read Only Mode).

The client is a server joined to a non trusted domain. I succeed in setting up the CEP throgh GPO. And I am able to renew a certificate manualy throgh MMC.

However the certificate dosn’t gets renewed automaticly. I do get eventid 1003 – that the certificate is about to expire. And autoenrolment is enabled throgh GPO. And if i try to manualy renewing – it works.

Any ideas?

key – How to Parse P12 Certificate

I’m writing a parse tool to extract each field of P12 file in C language, OpenSSL is too huge for my project.
After reading PKCS# series documents and ASN.1 documents, I understand the basic parse step.
I use OpenSSL to generate a self-signed P12 file,there’re some questions during parsing:

  1. Why Certificate is not stored in a Safebag, in my case it’s stored in EncryptedData field?
  2. What does the localKeyId attribute mean? it has an OctetString, what is the OctectString used for?
  3. Why the contentType of encryptedContentInfo is id-data? I think it should be id-encryptedData. In my case, Certificate is stored in encryptedContentInfo field.


Esc key not working on big sur

I have this problem that all of a sudden my ESC key completely stops working, it’s not the actual key because it happens with other keyboards. This happens regularly but on a random basis.

I am running version 11.2.2 (20D80)

Ajuda com Foreign Key, MySQL – Xampp

Banco de dados MySQL
Pergunta 1:
Estou tentando deletar uma Foreign Key e está dando esse erro:
#1044 – Acesso negado para o usuário ”@” ao banco de dados ‘information_schema’

Código: alter table informacoesproduto drop foreign key informacoesproduto_ibfk_1;

Pergunta 2:
Queria saber como renomear uma Foreign Key, pois quando eu fui criar, acabei botando um caracter especial no nome(+), então agora não estou conseguindo deletar.
Código: alter table informacoesproduto drop foreign key fk_exemplo+teste;