Mycelium Bitcoin Wallet

[boldar]

there is planning update and adding etherium?

Despite the massive amounts they've been able to crowdfund, I believe Ethereum won't be added anytime soon.

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[SimmonenY]

Hey guys, I just wanna ask is Mycellium a safe wallet to transfer big sums?

[hgmichna]

The real question is, how big is the risk that your bitcoins get stolen from your Android wallet, regardless of whether you transfer them or not.

The other question is, what do you consider "big sums"?

I would say, it is OK to keep or send less than one month's salary through Mycelium. If you keep your phone very safe and only install apps with a very high reputation, then I would agree to the salary of three months.

Beyond that I would use a paper wallet and Mycelium's cold storage function. There are a few things to be said about how to create a paper wallet safely, but I don't want to go into this right here.

Beyond a year's salary I would buy a Trezor, which can be used very nicely with Mycelium and remains completely safe, even if your Android phone is completely infested with malware. There is just no way for anything to get at the private keys that are stored inside the Trezor, except you when you read the Trezor's screen and push the Trezor's keys.

[OmegaStarScream]

I'm trying to sign a message from a paper wallet that I have, is that possible using Mycelium? I don't want to import or transfer the funds to my phone wallet, simply sign a message using the address that I wish to from the QR code.

[Millionero]

I'm trying to sign a message from a paper wallet that I have, is that possible using Mycelium? I don't want to import or transfer the funds to my phone wallet, simply sign a message using the address that I wish to from the QR code.

I think signing a message requires access to the private key for the address.
So you would have to "import the funds" (actually, import the private key) to the phone.
There's probably a way to do offline signing, similar to offline transactions, but I don't know of a way to do that with Mycelium.
I hope somebody who knows more about this than I do will chime in.

[hgmichna]

I'm trying to sign a message from a paper wallet that I have, is that possible using Mycelium? I don't want to import or transfer the funds to my phone wallet, simply sign a message using the address that I wish to from the QR code.

I think signing a message requires access to the private key for the address.
So you would have to "import the funds" (actually, import the private key) to the phone.
There's probably a way to do offline signing, similar to offline transactions, but I don't know of a way to do that with Mycelium.
I hope somebody who knows more about this than I do will chime in.

Fundamentally it does not make much of a difference. If you scan the private key into the phone, you temporarily lose the security of the paper wallet.

Mycelium ostensibly does its best to keep the private key secure when using the cold storage spending function, but it can only do so much. Ultimately a Trojan could obtain the key during such operations.

Importing the private key by importing the funds is somewhat less secure than cold storage spending, but it is fundamentally the same. I would not do it if the paper wallet carried a large sum, like several month's income. For even larger amounts I would not use a paper wallet at all. I would use a Trezor.

[European Central Bank]

I'm trying to sign a message from a paper wallet that I have, is that possible using Mycelium? I don't want to import or transfer the funds to my phone wallet, simply sign a message using the address that I wish to from the QR code.

i had to do this a while back as i couldn't move the coins from a paper wallet.

the only way i could find, though i didn't look too hard, was to download this - https://github.com/brainwallet/brainwallet.github.io

and use the sign function with the private key very far offline.

[dooglus]

the only way i could find, though i didn't look too hard, was to download this - https://github.com/brainwallet/brainwallet.github.io

and use the sign function with the private key very far offline.

Bitcoin Core can sign a message using a private key without importing the private key. So you can run Core on an offline machine and sign a message with your cold storage private key. No blockchain required either.

[Michail1]

I'm trying to sign a message from a paper wallet that I have, is that possible using Mycelium? I don't want to import or transfer the funds to my phone wallet, simply sign a message using the address that I wish to from the QR code.

The easy way is to use a brainwallet page to enter your private key, the message you want, and click sign.

The one I use is:  http://brain.evilbs.com/#sign
I am not suggesting you use the site, but I do.
You could install such a page on an offline computer so that you don't have to worry about leaking info.

There are other sites and downloads that allow you to do it as simply as that one.

[mishax1]

there is planning update and adding etherium?

NO!

[pawel7777]

I wanted to test the Coinapult integrated option (mycelium for android), sent ~£40 worth, went through OK, but when tried to withdraw it seems stuck. It's been entire day and still zero confirmation.

It's transfer from Coinapult so I don't have any blockchain tx information, so can't check what was the fee or whether the transaction have actually been initiated. All I got is Coinapult debug log.

Anyone have any experience with using Coinapult account, how long does it usually take for withdrawals to be processed?

Edit: tx cleared shortly after I posted the above.

[OmegaStarScream]

I'm trying to sign a message from a paper wallet that I have, is that possible using Mycelium? I don't want to import or transfer the funds to my phone wallet, simply sign a message using the address that I wish to from the QR code.

i had to do this a while back as i couldn't move the coins from a paper wallet.

the only way i could find, though i didn't look too hard, was to download this - https://github.com/brainwallet/brainwallet.github.io

and use the sign function with the private key very far offline.

Well, won't this will result in the same issue? I could simply import the private keys to Mycelium wallet and sign the message from there but that would be risky.

[Michail1]

I'm trying to sign a message from a paper wallet that I have, is that possible using Mycelium? I don't want to import or transfer the funds to my phone wallet, simply sign a message using the address that I wish to from the QR code.

i had to do this a while back as i couldn't move the coins from a paper wallet.

the only way i could find, though i didn't look too hard, was to download this - https://github.com/brainwallet/brainwallet.github.io

and use the sign function with the private key very far offline.

Well, won't this will result in the same issue? I could simply import the private keys to Mycelium wallet and sign the message from there but that would be risky.

Well.....
The github link is dead.  It was replaced with blank information.

The link I provided earlier is the same thing, but live version.  I can probably get the original github copy.

It's not the same issue, because you can put it on an offline computer so that there is no worry of the priv key being leak on the internet.

Installing the priv key to mycelium means that it's possible the key could be leaked either by a bad copy of mycelium or another app on the device.
 

[hgmichna]

Mycelium's automatic fees are getting ridiculous. Mycelium sets a "Low-prio" fee that is 10 times higher than the lowest-fee transactions that were being cleared during the last several days.

For example, until today the required fees for confirmation within a day are a tad above 20 satoshi/byte, yet Mycelium lets us choose no less than 235 satoshi/byte. For at least three days all transactions with fees above some 40 satoshi/byte have been confirmed.

This is stupid. If they cannot predict the fees, they should at least allow users to set their own fees. I have a lot of understanding for trying to make the wallet idiot-proof, but this is going too far.

It is also unintelligible why a wallet should not be able to see clearly the lowest fees that were successful during the last couple of days and allow the user to set a risky fee a bit above those. There are transactions, particularly those with a low value, that need a low fee, but that are neither urgent nor important, i.e. the user wants to take the risk that the transaction does not get confirmed.

Does anybody know an Android HD wallet that allows me to set the fee?

[voteformeg]

still do not understand what all off this has to do with de crowdsale off mycelium

think i keep them for a very , very long term

[pawel7777]

Mycelium's automatic fees are getting ridiculous. Mycelium sets a "Low-prio" fee that is 10 times higher than the lowest-fee transactions that were being cleared during the last several days.
...

There's indeed something odd with how fees are calculated. I noticed that sometimes the low-priority (which should be the lowest) is actually higher than 'economic' or 'normal', possibly because the wallet bundles the dust balances, resulting in more inputs and larger tx size (just my guess).

It would be awesome if they provided option to manually adjust recommended fees by allowing to set custom fee/byte, it's definitely doable.

[European Central Bank]

still do not understand what all off this has to do with de crowdsale off mycelium

think i keep them for a very , very long term

good plan and it's inevitable anyway. no one else is gonna them off you. they screwed the pooch on that one.

[Michail1]

Mycelium's automatic fees are getting ridiculous. Mycelium sets a "Low-prio" fee that is 10 times higher than the lowest-fee transactions that were being cleared during the last several days.

For example, until today the required fees for confirmation within a day are a tad above 20 satoshi/byte, yet Mycelium lets us choose no less than 235 satoshi/byte. For at least three days all transactions with fees above some 40 satoshi/byte have been confirmed.

This is stupid. If they cannot predict the fees, they should at least allow users to set their own fees. I have a lot of understanding for trying to make the wallet idiot-proof, but this is going too far.

It is also unintelligible why a wallet should not be able to see clearly the lowest fees that were successful during the last couple of days and allow the user to set a risky fee a bit above those. There are transactions, particularly those with a low value, that need a low fee, but that are neither urgent nor important, i.e. the user wants to take the risk that the transaction does not get confirmed.

Does anybody know an Android HD wallet that allows me to set the fee?

Wow dude, you're way off.  Fees haven't been 20spb for a year now.  Sure, you can pay that with other wallets, but then you'll be one of those people that complain about a TX taking days/weeks to confirm if at all.  We're in 2017. 

If you're complaining about Mycelium suggested rate, then you're going to need to complain about Core, Electrum, and Armory as well.  The fee estimation is wonky on each of them.

Mycelium is simply a convenient wallet phone app.  Most of it's users are simple.  Give them a choice to pay 0spb and they would AND they would be here complaining.  I do agree that the choice should be available, but not by default and a warning if such an option is turned on.  People will still complain though.

[The Sceptical Chymist]

No he's right,  mycelium's fees are ridiculous and not having the option to set them sucks.  It always amazes me that people defend poor design.  If no one complained, shit would never change.

[Michail1]

No he's right,  mycelium's fees are ridiculous and not having the option to set them sucks.  It always amazes me that people defend poor design.  If no one complained, shit would never change.

I agree, but to make it sound like Mycelium is so terrible, you should first realize that all other wallets are using the same/similar fee estimation algo.

It's better to simply suggest / request the option than to complain it isn't there.  I believe a DEV is more apt to listen to suggestions than complaints where other wallet designs are the same.   As I said, I agree the option (to allow the ability to set a tx fee) should be there as well.

Ya get more with sugar than with pee.  (Or whatever the saying is.)