Electrum 2.0 release

[ThomasV]

2 strange things in this release:
1. The default transaction fee was changed from 20000 satoshi (0.0002) to 50000 satoshi (0.0005 BTC) per kb
2. The default unit was changed from BTC to mBTC.

Yes, I noticed the change in default fee. It's a bit high to default at 0.0005btc. You can change the default fee in "Tools/Preference" anyway.

This is because the previous version was rounding the number of kilobytes in the transaction.
The new version uses the number of bytes to compute the fee, which is often smaller.

[1714951655]

1714951655

[jackbox]

2 strange things in this release:
1. The default transaction fee was changed from 20000 satoshi (0.0002) to 50000 satoshi (0.0005 BTC) per kb
2. The default unit was changed from BTC to mBTC.

Yes, I noticed the change in default fee. It's a bit high to default at 0.0005btc. You can change the default fee in "Tools/Preference" anyway.

This is because the previous version was rounding the number of kilobytes in the transaction.
The new version uses the number of bytes to compute the fee, which is often smaller.

I have found that using a fee less than .0001 per kb results in the tx taking up to ten blocks or more to be mined. Better off paying .0001 per kb and getting the tx mined in one or two blocks.

[oda.krell]

I have to say, 2.0 is amazing - works out of the box, and has exactly the features I was hoping for.

Great job, devs.

[wosch76]

How do I turn on HW1 support?

you need to install from sources; HW1 is not supported in the current executables.

Any reasons to why these aren't standard or are they not 100% ready?

I'm also interested in the answer to this.

[jackbox]

How do I turn on HW1 support?

you need to install from sources; HW1 is not supported in the current executables.

Any reasons to why these aren't standard or are they not 100% ready?

I'm also interested in the answer to this.

And can someone give step by step instructions on compiling it with both HW1 and Trezor modules?

[stingleword]

I'm going to repeat the question I had last time, which sadly went unanswered:

you need to create a special wallet, that will contain only imported keys.
see https://electrum.orain.org/wiki/Frequently_Asked_Questions#Can_I_import_addresses_from_other_Bitcoin_clients.3F

Could you guys explain the reasoning behind this and is their anyway around it? I have some imported addresses that are important to me, so I'm going to stick with 1.9.8 for now, I guess.

It appears this isn't technically correct. In 1.9.8, I used the importprivkey('5Key...') console command to add my own private keys, which still works; in 2.0 there is also Wallet > Private Keys > Import. It might not matter to you: I opened my 1.9.8 wallets with 2.0, had to enter my password once and wait for resync for each wallet to update, and now have no problems. 2.0 is much less flaky than 1.9.8 was for me (YMMV)

[ThomasV]

How do I turn on HW1 support?

you need to install from sources; HW1 is not supported in the current executables.

Any reasons to why these aren't standard or are they not 100% ready?

I'm also interested in the answer to this.

it is because the developer who is doing the builds did not receive his HW1 yet

[jackbox]

How do I turn on HW1 support?

you need to install from sources; HW1 is not supported in the current executables.

Any reasons to why these aren't standard or are they not 100% ready?

I'm also interested in the answer to this.

it is because the developer who is doing the builds did not receive his HW1 yet

That does not explain the lack of Trezor support also in this current build.

[Mitchell]

It appears this isn't technically correct. In 1.9.8, I used the importprivkey('5Key...') console command to add my own private keys, which still works; in 2.0 there is also Wallet > Private Keys > Import. It might not matter to you: I opened my 1.9.8 wallets with 2.0, had to enter my password once and wait for resync for each wallet to update, and now have no problems. 2.0 is much less flaky than 1.9.8 was for me (YMMV)

Oh, I see. Thanks stingleword! I wonder why they would add something like that to their FAQ if it isn't technically correct. Well, let's try 2.0!

EDIT: A new icon once again? Hmmm, it looks pretty good.
EDIT2: I got that C runtime error, but after that it worked like it should. Strange. Oh man, I can sweep address, sweet!
EDIT3: An invoice tab? That is freaking awesome! These are some amazing changes!

[Ozymandias]

Thanks, have been using electrum for long time now 

[unamis76]

Still no luck setting up amodem. Anyone tried it? What's the best frequency?

[Q7]

Im having issues with Electrum Sync'ing up, and when i click the network button the client freezes, i am restarting my pc now and will report back if anything changes / fixes its self.


*edit - No change, stuck in sync mode, it looks like it is connecting to a server, and i base that off the fact that ive seen a few different messages in the console tab.

ive also tried using the "wallet.synchronize()" option as well, and that did not fix it.

I was having the same issue as well because basically i tried to do a clean installation by removing everything including the old version data file. I took me almost an hour to sync before its finally done and having to close and restart the program multiple times so that it will change to faster server. I believe it has to do with the number of transactions as basically mine is an active wallet having done more than 100 transactions. Just have to be patient then.

[niktitan132]

Seems like Electrum new version is a big update! I like it! 

The new features are awesome. 

[knybe]

Anyone have any luck running this on Mac 10.10.2?

Seems to hang and can't access anything when the app opens.

[TTom]

Running it fine on 10.10.2 BUT and it's a BIG but, I did not set up a password for my wallet but I cannot send any BTC from my wallet without getting prompted for a password.  Which I never set up so my BTC are in prison right now.

[kkurtmann]

Running it fine on 10.10.2 BUT and it's a BIG but, I did not set up a password for my wallet but I cannot send any BTC from my wallet without getting prompted for a password.  Which I never set up so my BTC are in prison right now.

you just enter no password, I mean leave blank and enter. had to edit this because I could totally see someone typing in "no password"

[roman.z]

Still no luck setting up amodem. Anyone tried it? What's the best frequency?

Hi unamis,

I recommend using the following commands to test and calibrate the modem:

At the sender side, run:
$ BITRATE=1 amodem-cli send -vv -c auto

At the receiver's side, run (after the sender is running):
$ BITRATE=1 amodem-cli recv -vv -c auto

The sender will play a 2kHz tone, at maximum amplitude.
The receiver will try to find the best gain, such that the received audio will have the maximal amplitude that won't saturate the microphone.
It uses binary search method to adjust the gain via PulseAudio command-line utility, and it will take ~15 seconds to find the correct value for your setup.
If everything is OK, you would get "good signal" message with the coherency measure very close to 1.

Please attach the log, if there is a problem.

[roman.z]

Hello, thank you for your time in developing this tool. I saw the thread in which you presented this a while ago. Your reward was well deserved

On to business: Altough it errors out on the console, amodem seems to be working directly inside electrum. I haven't had much time to fiddle with it, but it does broadcast the transaction audio. It still gives me an error on the console though.

Besides this, have you tried your tool with a Raspberry Pi? If so, can you recomend anything for audio input? Maybe a specific external/USB soundcard?

Thanks in advance

Thanks for the good words

Regarding the console errors - could you please attach the error log?

I haven't tried running the modem on a RPi, but I guess that it would work with any ALSA-compatible audio USB card.
Acutally, it was exactly how I was testing it before switching to PortAudio (for better cross-platform support).
You can still use ALSA utils instead of PortAudio shared library, by using the following commands:

$ amodem send -i data.tx | aplay -f S16_LE -c 1 -r 32000
$ arecord -f S16_LE -c 1 -r 32000 | amodem recv -o data.rx

Since the RPi has much slower CPU than the average PC, it may not succeed handling the audio in real-time, so you may use a temporary file to buffer it.
You should also start with the lower bitrates, as they require less processing power.

[roman.z]

P.S.
I would be happy to help with any amodem issues.
Please use GitHub's issue tracker: https://github.com/romanz/amodem/issues

[RustyNomad]

Just downloaded Electrum 2.0.2 from the official website and download was stopped by Avast reporting a trojan (Win32:GenMalicious-BQF[Trj]), see image below.

Anybody else had this?

http://screencast.com/t/YATAshhXJrO