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Author Topic: Mycelium Bitcoin Wallet  (Read 586097 times)
Rassah
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July 04, 2014, 03:47:43 AM
 #761

Came across this thread https://bitcointalk.org/index.php?topic=632754.0
So is it possible for you guys to add a coin mixer on mycelium. I know that the coins would have to be held on a central server so that they can be mixed but can this be possible without the server?

There is something called CoinJoin, which is basically a mixer that doesn't rely on a central server. Everyone creates a single transaction putting their money and taking it out at the same time, then passes that transaction around, and signs it with their own keys once they verify that each person will get their own money back. Once everyone checks that they're not getting robbed and signs the transaction, the transaction is broadcast, and everyone's coins get mixed all at once. No need for servers (other than to help potential mixees find each other), and no need to trust anyone. That's basically what DarkWallet implements for anonymity. But in order to do that, you need to be able to send change, or in this case output from your coins, to a new address, which means you need BIP32 HD Wallets. That's what Mycelium is working on implementing in their wallet right now. Once HD wallets are done, they should be able to get CoinJoin in as well, and then you'll have mixing right in your android wallet.
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July 04, 2014, 04:20:23 AM
 #762

Mycelium has the same fee calculation as Bitcoin-Qt. Personally, I want this to be an option, too, but the mighty devs have spoken, and they have their reasons  Tongue

If that's true that's excellent news! Bitcoin-Qt even does transfers without any fee when the blocks are mature enough, the transaction big enough and the size small enough. Works perfectly. Would Mycelium do the same, given the same circumstances?
Not quite yet, but it should, and we are going to add it.

Mycelium let's you hold your private keys private.
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July 04, 2014, 06:53:35 AM
 #763

Not quite yet, but it should, and we are going to add it.

Cool! Thanks!

I've used Mycelium since it forked from Spinner and I must say it keeps improving. Good work!
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July 04, 2014, 07:01:19 AM
Last edit: July 04, 2014, 10:54:07 AM by validium
 #764

Came across this thread https://bitcointalk.org/index.php?topic=632754.0
So is it possible for you guys to add a coin mixer on mycelium. I know that the coins would have to be held on a central server so that they can be mixed but can this be possible without the server?

There is something called CoinJoin, which is basically a mixer that doesn't rely on a central server. Everyone creates a single transaction putting their money and taking it out at the same time, then passes that transaction around, and signs it with their own keys once they verify that each person will get their own money back. Once everyone checks that they're not getting robbed and signs the transaction, the transaction is broadcast, and everyone's coins get mixed all at once. No need for servers (other than to help potential mixees find each other), and no need to trust anyone. That's basically what DarkWallet implements for anonymity. But in order to do that, you need to be able to send change, or in this case output from your coins, to a new address, which means you need BIP32 HD Wallets. That's what Mycelium is working on implementing in their wallet right now. Once HD wallets are done, they should be able to get CoinJoin in as well, and then you'll have mixing right in your android wallet.

Forgot there was something like coinjoin but anyway cant wait for this feature to be added and due to the high number of people using mycelium the mixing might be very effective(0% taint)

Thanks rassah.

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July 04, 2014, 01:01:08 PM
 #765

Not quite yet, but it should, and we are going to add it.

Cool! Thanks!

I've used Mycelium since it forked from Spinner and I must say it keeps improving. Good work!
Thank you!
We are in major coding mode for the upcoming Mycelium 2.0. The wallet will change a lot on the inside, but may not look that different from a UI perspective.
except for BIP32/39/43/44 support and then some, did I say Trezor compatible Grin
... something to work on in the summer heat. Give us a few months

Mycelium let's you hold your private keys private.
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July 04, 2014, 01:10:56 PM
 #766

Not quite yet, but it should, and we are going to add it.

Cool! Thanks!

I've used Mycelium since it forked from Spinner and I must say it keeps improving. Good work!
Thank you!
We are in major coding mode for the upcoming Mycelium 2.0. The wallet will change a lot on the inside, but may not look that different from a UI perspective.
except for BIP32/39/43/44 support and then some, did I say Trezor compatible Grin
... something to work on in the summer heat. Give us a few months

I am very impatient on BIP32 and 39. What are bip43 and 44. They are not listed here : https://en.bitcoin.it/wiki/Bitcoin_Improvement_Proposals
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July 04, 2014, 01:53:45 PM
 #767

Not quite yet, but it should, and we are going to add it.

Cool! Thanks!

I've used Mycelium since it forked from Spinner and I must say it keeps improving. Good work!
Thank you!
We are in major coding mode for the upcoming Mycelium 2.0. The wallet will change a lot on the inside, but may not look that different from a UI perspective.
except for BIP32/39/43/44 support and then some, did I say Trezor compatible Grin
... something to work on in the summer heat. Give us a few months

I am very impatient on BIP32 and 39. What are bip43 and 44. They are not listed here : https://en.bitcoin.it/wiki/Bitcoin_Improvement_Proposals
https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki seems to be the hierarchy that Trezor uses. BIP 44 builds on top of BIP43.

Mycelium let's you hold your private keys private.
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July 04, 2014, 01:58:44 PM
 #768

Not quite yet, but it should, and we are going to add it.

Cool! Thanks!

I've used Mycelium since it forked from Spinner and I must say it keeps improving. Good work!
Thank you!
We are in major coding mode for the upcoming Mycelium 2.0. The wallet will change a lot on the inside, but may not look that different from a UI perspective.
except for BIP32/39/43/44 support and then some, did I say Trezor compatible Grin
... something to work on in the summer heat. Give us a few months

I am very impatient on BIP32 and 39. What are bip43 and 44. They are not listed here : https://en.bitcoin.it/wiki/Bitcoin_Improvement_Proposals
https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki seems to be the hierarchy that Trezor uses. BIP 44 builds on top of BIP43.

Thanks, bitcoin wiki is not up to date. I am going to read these bips. Sounds promising.
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July 08, 2014, 01:36:05 PM
 #769

I love Mycelium and it's absolutely my #1 recommended wallet for Android users.

One issue: on several occassions I noticed that when receiving a "real life" (face to face) payment with a Mycelium wallet, sometimes it takes quite long before the payment is even visible. I open my Mycelium wallet, show them my QR, they scan it (regardless of what wallet they use: also Mycelium, or Andreas Schildbach, or something else) and send the payment. Then it often takes 10-20 sec or even more before my Mycelium wallet even notifies the payment.

This is quite long. For online / web payments this may be fine but when transmitting money person to person, it should poll for incoming transactions more frequently (like with Andreas Schildbach which is almost instantly). Of course, confirmation is a different story, I'm justing talking about seeing the transaction on the network.

P.S. Mycelium deserves its own alternative client subforum!


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July 08, 2014, 01:52:50 PM
 #770

A minor suggestion: when entering the PIN number, it would be nice if the virtual keys were randomly scrambled (and maybe that could be a configurable setting). Thx.
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July 09, 2014, 11:54:25 PM
 #771

probably it has been asked in that thread, but i could not find it. sorry in advance.

as apple's new t&c might grant wallets etc. a chance for a comeback, is there a plan to develop an iphone version?
thx Smiley
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July 10, 2014, 07:53:28 AM
 #772

is there a plan to develop an iphone version?
thx Smiley

Nope. Not in our plans yet. Two operating systems and development environments are quite different, so doing a port would take up a considerable amount of work and time, which we can't spare right now. We wouldn't mind some developer picking up the project and doing it themselves, since Mycelium code is available on github, but so far no one offered.
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July 10, 2014, 09:55:25 AM
 #773

is there a plan to develop an iphone version?
thx Smiley

Nope. Not in our plans yet. Two operating systems and development environments are quite different, so doing a port would take up a considerable amount of work and time, which we can't spare right now. We wouldn't mind some developer picking up the project and doing it themselves, since Mycelium code is available on github, but so far no one offered.

i can understand you. how about adding another goal to your indiegogo campaign for an iphone version?
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July 11, 2014, 03:35:04 PM
 #774

is there a plan to develop an iphone version?
thx Smiley

Nope. Not in our plans yet. Two operating systems and development environments are quite different, so doing a port would take up a considerable amount of work and time, which we can't spare right now. We wouldn't mind some developer picking up the project and doing it themselves, since Mycelium code is available on github, but so far no one offered.

i can understand you. how about adding another goal to your indiegogo campaign for an iphone version?

Eventually, maybe, but we can't really handle more projects right now, and running an Indiegogo campaign is a project by itself
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July 14, 2014, 09:09:55 AM
 #775

Since Bitcoin Core 0.9, the default transaction fee ('relayfee' in bitcoin.conf) was changed from 0.0001 (or 0.1 milliBTC or 100 bits) to 0.00001 BTC (or 0.01 milliBTC or 10 bits) per kilobyte.

Any chance this can be applied in Mycelium Bitcoin Wallet too?

One of the advantages of Bitcoin used to be 'almost free' transactions. But with todays currency rates, 0.0001 BTC is 4~5 euro cents, which is (even though it's obviously a small amount of money) still a lot more than consumers pay on regular bank wire transfers. Also, for micropayments (typically less than one euro) or small donations, a 4~5 cent fee is a pretty high percentage.

So, fixing Mycelium to use the official Bitcoin Core tx fee would help a lot in convincing people to give Bitcoin a try and put it to use in actual economic traffic!

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July 14, 2014, 07:06:00 PM
 #776

So, I have a question regarding its backup format. Is it importable into other Bitcoin wallets or only Mycelium?



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July 15, 2014, 09:19:43 AM
 #777

Since Bitcoin Core 0.9, the default transaction fee ('relayfee' in bitcoin.conf) was changed from 0.0001 (or 0.1 milliBTC or 100 bits) to 0.00001 BTC (or 0.01 milliBTC or 10 bits) per kilobyte.
Any chance this can be applied in Mycelium Bitcoin Wallet too?

The relayfee is the minimum amount the transaction has to be, in order for the node to relay it. This is to prevent spam from propagating, and is _NOT_ the default transaction fee, or guaranteed to have some miner include the transaction, or whatever. It is just the threshold for forwarding the transaction to other nodes. That said, the transaction fee stuff will eventually be reworked. We cant say exactly how and when right now, but its on the list.
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July 15, 2014, 09:22:56 AM
 #778

So, I have a question regarding its backup format. Is it importable into other Bitcoin wallets or only Mycelium?

It is importable only into the Mycelium Wallet, but if needed, you can use the provided backup tool to decrypt it and have a standard wallet import format.
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July 15, 2014, 02:53:23 PM
 #779

So, I have a question regarding its backup format. Is it importable into other Bitcoin wallets or only Mycelium?

It is importable only into the Mycelium Wallet, but if needed, you can use the provided backup tool to decrypt it and have a standard wallet import format.

Very good to know, makes me much more comfortable!

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July 21, 2014, 04:52:19 PM
 #780


Minor feature request:

In "Transaction details", allow to copy the hash directly to the clipboard. Makes it quicker to email it somebody.

Additionally, for the redirect, allow the user to select other targets (in Settings), i.e. blockexplorer.com, btc.blockr.io or live.insight.is

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