Es ist anders herum.

Transaktionen von einer legacy adresse (P2PKH, beginnend mit 1.. sind teurer).
Es ist egal an welche Adresse man sendet, es kommt immer nur darauf an von welcher man die TX sendet.




Ja, das stimmt.
Man spart sich ca. 26% der Gebühren wenn man nested segwit (3..) verwendet, gegenüber legacy transaktionen,
und wenn man native segwit (bc1..) verwendet sind es ca. 38%.

What bothers me is the return code 65280.

Unfortunately i am not sure what causes this, but it might be a faulty script ? Are you able to call it from the command line properly using /usr/bin/php /home/bitcoin/script.php ?

You might try it with a simple shell script to see whether your php script is the reason or some configuration. Something like this should be enough:

Place it anywhere and change walletnotify to:

See whether it can be called properly. If so, it should create a file in /tmp and the current time/date should be inside of the file.

If this dummy script is working, your script seems to be faulty. In this case post it somewhere so we can take a look at it. If you don't want to paste it publicly, feel free to PM it to me. I'll try to take a look at it.
If this dummy script isn't working either, some configuration is faulty, but currently not sure what exactly. Permissions maybe ?

Well, they are.
Most malware simply is coded for windows. And the majority of mac user are not techy at all. Most of them can't even update their browser themselves.

Those people are way easier to be tricked into downloading/installing malware.

And an AV would at least protect against already known threats or obvious malware actions.




It doesn't make it secure. But it at least adds some security to it.
The companies earn from the premium subscription and from the information your computer is sending them back whenever something strange happens (i.e. new file making new weird actions, etc.).

Klar, ist ja auch der Sinn von Crypto 


Habe zuvor noch nie etwas von spot9 gehört, scheint aber so als wäre das nur ein money-grab.
Start-up ohne etwas dahinter. Einfach nur an schnellem Geld interessiert.

Glaube nicht, dass sich deren "Service" durchsetzen wird. 

Generally, each desktop wallet can only be as secure as your computer is.
If your computer is infected with malware, your coins are at risk.

Regarding safety, if you have a backup of your mnemonic code (12 words), you are fine.
You don't need to save any private keys. All private keys can be derived from the mnemonic code. Just make sure to store it in a secure place. Be careful, anyone with access to the mnemonic code can recreate your wallet.

Additionally, make sure to download updates only from https://electrum.org. And always verify the signature before installing it. This takes less than 2 minutes and makes sure you are using the original electrum wallet. There are several guides available on the internet, as well as on electrum.org.

You are right with the fact, that it's not possible that you can't send them.

Chances are high that you created a 2FA wallet. With this, you are using a 3rd party to co-sign your transactions (they can't steal your funds).
TrustedCoin charges 0.0005 BTC per transaction and you need to buy credits for 20 iirc. That would be 0.01 BTC additional fee for your 1st transaction (with credits for the next 19 co-signed tx's).

Since your wallet cointains 20€, which is roughly 0.002BTC, that's probably the issue.
A lot of people had the same problem once setting up a 2FA wallet.

Can you confirm whether you have set up a 2FA wallet ?

Not literally any cable.
It needs to have the data pins too, not only the power pins 




And there are other additional wallets (on android) which support the ledger nano, e.g. Mycelium (fully functional, not viewing only).




I'm looking forward to the next season of Mr. Robot, wouldn't be surprised to see it there. 

Wie Coiner.de bereits erwähnte, ist dies nicht der Fall.
Die Adresse ist das Ergebnis des RIPEMD160-hashes des SHA256-hashes des public keys.




Private keys lassen sich bei allen (guten) Wallets anzeigen, wobei Jaxx zu einem schlechten Wallet gehört (Sicherheitsprobleme etc.).




Stimmt so auch nicht ganz.
Zu jedem private key gibt es 2 public keys (compressed und nicht compressed)

Und wenn man es weiterspinnen möchte, gibt es sogar noch mehr. Legacy (P2PKH), P2SH und P2WPKH Adressen können alle vom selben Private Key abgeleitet werden.




Die meisten Wallets basieren auf BIP39 (mnemonic code -> seed conversion).
Electrum hingegen hat sein eigenes Verfahren. Ist also nicht kompatibel zu anderen Wallets.




Es wird genau genommen nicht daran gehängt, sondern der Seed wird mit diesem Passwort verschlüsselt.
Ohne Passwort, wird einfach ein leerer String ("") genommen.




Core verwerndet einen seed.
Nur wird dieser Seed nicht mittels BIP39 zu einem Mnemonic code (die 12/24 Wörter) konvertiert. Es ist aber trozdem ein HD wallet (BIP32), so wie die meisten anderen (wenn nicht sogar alle) auch.




Die Fee-erhöhung ist das RBF (Replace-by-Fee).
CPFP (Child-pays-for-Parent) ist eine andere Möglichkeit die Transaktion "durchzubringen". Das kann von jedem Wallet aus gemacht werden, das ist kein spezielles Feature welches nur von bestimmten Wallets unterstützt wird.

The monero application can be installed using the 'manager' in ledger live (Click on 'manager' on the left -> search for 'monero').
Then you just need a monero wallet which supports ledger nano (e.g. the full node wallet).

I can see and install the application without any problems.

Your config looks right to me.

You have basically two options to call your php script.

1)
Like you are trying it to do:

This requires your php file to be executable (chmod +x) and a shebang pointing to the php executable in the first line of your script (e.g.  #!/usr/bin/php)


2)

This does not require the file to be executable or to contain a shebang in the first line.


Note that you have to replace /usr/bin/php with your actual path to the php executable, which can be found using this command:

Well, not really, no.

But malware can be part of a phishing campaign, which itself is geared towards gaining sensitive information of the victim (e.g. private keys).
Multiple user already have downloaded malware from a fake electrum site and tried to install it. Luckily their AV prevented that.


I'd still always recommend people who are using windows or mac to always use an AV. It usually brings more value than it creates inconveniences.

Huh ?
Because i said that it is very unlikely ?

Let me think.. a powerful GPU needs roughly 445.403.702.764.800.000 years on average.
And you want to tell me that you found such an address with a CPU in 1 year ?

There are so many trolls here claiming to have bruteforced satoshis private keys and whatsoever..
No offense.. but you seem to be one of these trolls.




As mentioned. Nothing.

You can not call it a 'private key issue'.
That is the curcial point. That's wall that matters.

If a 3rd person knows the private key, it is worth nothing. In numbers: 0

Since you are in possession of the private key, the address isn't worth anything anymore to other people.

There is simply no way for them to be sure you won't use that private key to steal funds / sign messages in their name.


Btw.. a really really powerful processor would not be enough to generate a 17 char prefix within a year
It wouldn't even be possible within your lifetime.

A 12 char prefix with a high end graphic card would take roughly 117.000 years on average. I really doubt you found a 17 char long with a 'really powerful processor' 

Am besten wäre für dich vermutlich electrum.
Brauchst nicht die ganze blockchain auf dem Rechner. Das spart Platz und Zeit.

An sich ist jedes (richtige) wallet ok. Wichtig ist eben, dass du (und nur du) die Kontrolle über deine private keys hast.
Die Transaktionsgebühren lassen sich bei jedem guten Wallet präzise wählen.

Bei vielen kleinen Eingängen hast du halt das Problem, dass die Transaktionsgebühren recht hoch werden weil die Größe der TX eben groß wird (viele Inputs).

So, you already had electrum installed on this computer, right ? Do you remember whether the addresses also started with 1.. ?
The password you entered was the password to open your default_wallet ?

The good thing is, as long as you have your 12 words, your coins are safe.


You might still try to check one of your first addresses in a block explorer (e.g. https://live.blockcypher.com/btc/), whether it has a balance or transaction history.

With datadir you are referring to satoshi-datadir as mentioned by BitCryptex, right ?

Because there are 2 different parameters:

• datadir: For armory config files etc. (not what you want to edit)
• satoshi-datadir: This one should point to the block folders of core (that's the one you want to edit)

---

Edit:
Was too late with my reply. You set the correct parameter.

That's the output of the log:

Are you sure the directory is correct ?
D:\BitcoinCore\blocks should be the correct one if you installed core into D:\BitcoinCore.

Can you verify whether there is a folder named blocks inside of this directory ?
May it be possible that you installed core into this directory but it still uses the standard one (C:\Users\USERNAME\AppData\Roaming\Bitcoin\blocks) as its data/blockchain directory ?

You could associate one order to one address and then keep track of all transactions to this order. You could have tables like this:
order <-> address (1:1)
address <-> transactions (1:n)
transaction <-> confirmation (1:n)

I think this should work (not absolutely sure about any edge cases).




You should use blocknotify only to count confirmations.

Better use walletnotify for all incoming transactions -> assigning in your database etc. and for the first confirmation.
Then increase the count of the confirmations the next time blocknotify is called. I don't think you need blocknotify for anything else.

Or am i missing something ?

I assume you already had an electrum wallet and downloaded a new version now, right ?
Do you see 'addresses' in your new wallet (e.g. go to the addresses tab). What do these start with (1.. 3.. or bc1.. ) ?

Maybe you have multiple wallet files ? Go to file -> open and look whether there are multiple files (without extension). The default wallet is called default_wallet.
If you know which address should contain some balance, visit https://live.blockcypher.com/btc/ and enter your address in the search bar. Do you see any balance / transactions there ?

Or didn't you have electrum installed on your computer at all ? How did you create the wallet then ? What exact steps, did you restore it by entering 12 words ? Or did you create a new wallet ?
Do you have your backup phrase (12 words) ?

Those scripts would be run whenever your node receive a block / transaction.

If your node is down, it doesn't receive anything.
When you start it up again, and it starts catching up those missing blocks, all received blocks will call blocknotify and all transactions to your wallet received will call walletnotify.

It does not skip anything. It resumes operation after the node is up again.




listtransactions gives you the last X transaction sent to your wallet.

I disagree.

Several user already have been warned from electrum phishing sites (or even from the malware they downloaded from that site) by their AV.
They would have lost their coins without an AV.

While AV's only recognize already known or blatantly stupid malware, every average windows- or mac user should have one installed.

And neither mac or linux are safe from malware. There is malware for these operating systems, less than 2-3%, but still it exists.
A secure operating system doesn't protect you against 1) malware being executed by non-techy people or 2) other kinds of targeted attacks (which are very costly and complex).

Changing the OS doesn't protect an absolute non-techy person at all, IMO.
Good OS in combination with common sense and some technical knowledge does.


I think it it safe to assume that you are not a clicky-pointy type of person who is running a colorful windows installation. You don't need an AV. That's fine, me neither.
But i would never suggest other people reading this (especially those running windows being not techy at all) to live without an AV. It offers at least some level of security.