ecdsa – generation of OpenSSL bitcoin addresses

I did the same exercise on my OSX system, and this is my result:

$ openssl version
OpenSSL 1.0.2j  26 Sep 2016

$ openssl ec -in privkey.pem -outform DER|tail -c +8|head -c 32|xxd -p -c 32
read EC key
writing EC key
18e14a7b6a307f426a94f8114701e7c8e774e7f9a47e2c2035db29a206321725

I guess the PEM key is not in the correct format, PEM follows some specific rules. There are also several discussions here at bitcoin.SE

My privkey.pem looks like this:

$ cat privkey.pem
-----BEGIN EC PRIVATE KEY-----
MFQCAQEEIBjhSntqMH9CapT4EUcB58jndOf5pH4sIDXbKaIGMhcloAcGBSuBBAAK
oSQDIgACUIY61kqHroov6Dwa8ahAPLU/U+SG2FEdrYoEiH5bI1I=
-----END EC PRIVATE KEY-----

This is a "test" key, please note the word "Risc" in the bitcoin address generated from this key. Do not use it for any value, funds will be forfeited.
If you have a test key, and it really is a test key, you can share it and we can take a look at it (and you will never use it again).

address – Confusion about addresses

I have a little confusion about segwit and non-segwit addresses.

I can see P2WPKH Y P2WSH from this link https://en.bitcoin.it/wiki/BIP_0173, and they are segwit and start with BC (mainnet) or tuberculosis (Testnet).

But I can even see P2SH, start with 3 nested P2WPKH or P2WSH, and that address starts with 3.

So when we talk about P2WPKH Y P2WSH we mean natives and we start with BC, or Can we make P2WPKH start with 1 and P2WSH start with 3?

when i believe

bitcoin-cli getnewaddress "segwit" "p2sh-segwit" 

What kind of script do I have? P2PK?

outlook.com – Where can I find the official size limit for incoming messages at hotmail.com addresses?

There are many websites that echo the fact that Hotmail's maximum message size is 10 million, some claim they have been recently updated. But just now in 2020 I successfully sent a 26 million message to a Hotmail address, and the attachment was successfully received by a test hotmail.com account that I just created for that purpose. Clearly, the "10M maximum" figure is outdated, or at least does not apply to incoming messages from other providers to newly created Hotmail accounts. Where (if there is any place) in Hotmail or on Microsoft websites can I find the official statement of your current limits?

Electronic commerce: validation of addresses in electronic commerce. How to present?

Imagine a standard web store with a standard payment flow where the customer must enter a valid shipping address.
I'm looking for a good use of the UPS Address Validation – Street Level API but you can't seem to understand how to use the suggestion in a meaningful way.

Script

The correct address of customers is

2060 N KENTUCKY ST
ARLINGTON VA 22205
U.S

Case: the customer enters an incorrect house number

Instead of 2060 He comes in 2600

API hints

"Candidate": [{
        "AddressKeyFormat": {
            "AddressLine": "2600 S KENT ST",
            "PoliticalDivision2": "ARLINGTON",
            "PoliticalDivision1": "VA",
            "PostcodePrimaryLow": "22202",
            "PostcodeExtendedLow": "2218",
            "Region": "ARLINGTON VA 22202-2218",
            "CountryCode": "US"
        }
    }, {
        "AddressKeyFormat": {
            "AddressLine": "1000-1098 N KENTUCKY ST",
            "PoliticalDivision2": "ARLINGTON",
            "PoliticalDivision1": "VA",
            "PostcodePrimaryLow": "22205",
            "PostcodeExtendedLow": "2310",
            "Region": "ARLINGTON VA 22205-2310",
            "CountryCode": "US"
        }
    }, {
        "AddressKeyFormat": {
            "AddressLine": "1001-1099 N KENTUCKY ST",
            "PoliticalDivision2": "ARLINGTON",
            "PoliticalDivision1": "VA",
            "PostcodePrimaryLow": "22205",
            "PostcodeExtendedLow": "2309",
            "Region": "ARLINGTON VA 22205-2309",
            "CountryCode": "US"
        }
    }, {
        "AddressKeyFormat": {
            "AddressLine": "1100-1198 N KENTUCKY ST",
            "PoliticalDivision2": "ARLINGTON",
            "PoliticalDivision1": "VA",
            "PostcodePrimaryLow": "22205",
            "PostcodeExtendedLow": "3516",
            "Region": "ARLINGTON VA 22205-3516",
            "CountryCode": "US"
        }
    }, {
        "AddressKeyFormat": {
            "AddressLine": "1101-1199 N KENTUCKY ST",
            "PoliticalDivision2": "ARLINGTON",
            "PoliticalDivision1": "VA",
            "PostcodePrimaryLow": "22205",
            "PostcodeExtendedLow": "3515",
            "Region": "ARLINGTON VA 22205-3515",
            "CountryCode": "US"
        }
    }, {
        "AddressKeyFormat": {
            "AddressLine": "1500-1598 N KENTUCKY ST",
            "PoliticalDivision2": "ARLINGTON",
            "PoliticalDivision1": "VA",
            "PostcodePrimaryLow": "22205",
            "PostcodeExtendedLow": "2825",
            "Region": "ARLINGTON VA 22205-2825",
            "CountryCode": "US"
        }
    }, {
        "AddressKeyFormat": {
            "AddressLine": "1501-1599 N KENTUCKY ST",
            "PoliticalDivision2": "ARLINGTON",
            "PoliticalDivision1": "VA",
            "PostcodePrimaryLow": "22205",
            "PostcodeExtendedLow": "2824",
            "Region": "ARLINGTON VA 22205-2824",
            "CountryCode": "US"
        }
    }, {
        "AddressKeyFormat": {
            "AddressLine": "1800-1899 N KENTUCKY ST",
            "PoliticalDivision2": "ARLINGTON",
            "PoliticalDivision1": "VA",
            "PostcodePrimaryLow": "22205",
            "PostcodeExtendedLow": "2826",
            "Region": "ARLINGTON VA 22205-2826",
            "CountryCode": "US"
        }
    }, {
        "AddressKeyFormat": {
            "AddressLine": "2000-2098 N KENTUCKY ST",
            "PoliticalDivision2": "ARLINGTON",
            "PoliticalDivision1": "VA",
            "PostcodePrimaryLow": "22205",
            "PostcodeExtendedLow": "3218",
            "Region": "ARLINGTON VA 22205-3218",
            "CountryCode": "US"
        }
    }, {
        "AddressKeyFormat": {
            "AddressLine": "2001-2099 N KENTUCKY ST",
            "PoliticalDivision2": "ARLINGTON",
            "PoliticalDivision1": "VA",
            "PostcodePrimaryLow": "22205",
            "PostcodeExtendedLow": "3217",
            "Region": "ARLINGTON VA 22205-3217",
            "CountryCode": "US"
        }
    }, {
        "AddressKeyFormat": {
            "AddressLine": "2100-2199 N KENTUCKY ST",
            "PoliticalDivision2": "ARLINGTON",
            "PoliticalDivision1": "VA",
            "PostcodePrimaryLow": "22205",
            "PostcodeExtendedLow": "3219",
            "Region": "ARLINGTON VA 22205-3219",
            "CountryCode": "US"
        }
    }
    ...

What suggestions to make for the client?

Of course, it makes sense to provide the first suggestion to the customer

Did you mean 2600 S KENT ST?

But how would you present the rest of the options where AddressLine The item contains a range of house numbers.

1000-1098 N KENTUCKY ST

Question

Have you seen or implemented something like this? – provide a link where you can find it
Any clue is highly appreciated

magento2 – M2 – Adds the ability to edit previously saved shipping addresses while in Checkout

Using Magento CE 2.2.4

We are looking for the possibility of editing the shipping addresses previously saved within the payment process. We see that if you create a new address, you can continue to edit that particular address, but it would be possible to include the edit button in all addresses for the instance where someone only wants to change the name in the shipping address – instead of having than creating a whole new address?

nginx: how to redirect depending on a range of IP addresses?

I am trying to make a site only accessible from the local network and people on the external network will get a static page that says some other message.

This is what I'm trying to do, but it doesn't seem to work. Where did I go wrong?

         if ($remote_addr != 192.168.1.0/24) {
                   rewrite ^/* /covid19 last;
         }

web hosting: how to migrate email addresses from old domain to new one, but still allow sending to old email addresses?

Our company currently has a domain old.example.

In the future, they want to use a new domain new.example as primary domain

  1. This means that we will host the new website at new.example and then configure a redirect from old.com to new.example. No problem here.
  2. Going forward, we will create new email addresses like mail@new.example.
  3. My question is about handling email accounts already linked to old.com.
    We would like the above email address to be available through mail@new.example.
    However, when someone still sends emails to mail@old.example, mail must still be received on mail@new.example.

How I can get this? Should we re-create all email addresses with the domain? new.example and then create a forwarding rule from mail@old.example to mail@new.example. There has to be a smarter way to do this? Any kind of alias method that can be used?

[WTS] NL and UK servers fully configurable? Up to 30 IP addresses? Unmeasured traffic

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Is it possible to use global IP addresses without internet?

Is it possible to use global IP addresses without internet?

Obviously, private IP addresses must be used without internet access.
But I am curious to know if we can use any IP address as private IP.
Is this possible to do?

For example, can we use 8.8.8.8 as a private IP address on a private network (which never has Internet access, so no one on the network knows that 8.8.8.8 is being used as Google DNS)?

bitcoind: getnewaddress will not generate bech32 or p2sh-segwit addresses

We can only generate "legacy" addresses that start with a "1". This is a longstanding issue that generates new addresses using bitcoind and has persisted in some recent bitcoin core versions.

This could be a possible bug in 64 bit Bitcoind Linux.

We are currently running kernel 19.1 taken from here: https://bitcoincore.org/bin/bitcoin-core-0.19.1/

And our version of Linux is: Ubuntu 18.04.3 LTS x86_64

We have "addresstype = bech32" set in our bitcoin.conf.

Has anyone else seen this problem before?

Here is our bitcoin.conf:

addnode=**.***.***.***

server=1

rpcport=****

walletnotify=/btc_notify.sh %s

# OpenSSL settings used when rpcssl=1
rpcsslciphers=TLSv1+HIGH:!SSLv2:!aNULL:!eNULL:!AH:!3DES:@STRENGTH
rpcsslcertificatechainfile=server.cert
rpcsslprivatekeyfile=server.pem

gen=0

keypool=100

paytxfee=0.00005000

addresstype=bech32

And here is an example of how the problem manifests itself:

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