Topic: I still have bitcoin in an old MBC 0.5.18 wallet - how do I recover them safely? (Read 194 times)

Those times are just estimates, based on current network conditions at the time the estimate is given... And it would seem that it assumes no more transactions are added to the mempool.

Given that the mempool has been holding steady at 100,000+ unconfirmed for over a week (and currently 130k+), this last assumption is, in my opinion, very dangerous.

A lot of users see, 6-12 hours and think, yeah I can wait that long... And then wonder why their transaction is still unconfirmed 3 DAYS later...

Go check the "Tech Support" (and "Dev and Tech Discussion") and have a look at how many "stuck transaction for X days, HELP!" type threads their are at the moment... Sure a lot are paying like 10 sats/byte or 50 sats/byte... But I've seen a few that were like 300+


As for calculating transaction size, the important thing to realise is that it has NOTHING to do with the amount of BTC being sent...

A transaction of $1,000,000 can be smaller than one of $10... It all depends on the number of inputs and (to a lesser extent) the number of outputs.

SegWit has changed things a little... But when dealing with non-segwit, the "rule of thumb" measurement was basically:

Transaction size (bytes) = (Number of inputs * 148) + (number of outputs * 34) + 10

NOTE: When using Electrum, you can just click "preview" and it will give you a pretty good estimate of the size (it could be off by about 2 bytes at most)

Ah ok, thanks for the clarification.

I will try to resolve the problem with electrum or I'll just use a friends computer.

Also is there a good starting point for me to begin reading about transaction fees? From what I understand I have to pay a fee for every byte of the transaction, but how do I know how many bytes the transaction has? Does it depend on how many bitcoins I want to send?

EDIT: Ok I just found this website here https://bitcoinfees.earn.com/

It says that a transaction has between 250 and 500 bytes on average. Judging from the table there, 500 Satoshis per byte ensures that the transaction doesn't take forever (up to 1440 minutes, so around 24 hours).
That would mean a transaction would cost me ~40€, which doesn't sound THAT bad when I want to send 0.5 or even more BTC. Have I understood and calculated that correctly?

When you sweep private key in some wallet this is just like you send them in transaction,you need to pay a fee for that.So in order to sweep key in Coinomi you need to pay fee and second fee will be when you send your BTC to Ledger wallet.

Best way would be if you can solve problem with Electrum installation,then import private keys(free-no fees) and send your BTC in transaction to Ledger.When your BTC is safe then using same private key you can claim BCH&BTG.

Why you can not install any version of Electrum on Windows 10 I really can not answer since I am on Windows 7.Try to search on internet is someone has similar problems.Also try to disable your antivirus/firewall before installation,and if you have chance to use another computer try that.

But whatever you do better wait some time,network is not in good shape now and fees are very high.

Ok, so if I'd sweep my private keys into coinomi, I'd instantly have access to my BTC, BCH and BCG, right? Then I would send them to my ledger wallet. What kind of fees and waiting time would I have to expect? (And why "effectively two transactions for each coin"? Wouldn't it be only one? (from coinomi wallet to ledger wallet))

And if import my private keys into Electrum, I could use my electrum wallet on my ledger without having to send them to another wallet, right? (Or do I still have to send them to a new wallet and have to pay fees?)
And then I could import the same private keys into ElectronCash, claim my BCH and also send them to my ledger wallet?

I don't really care about waiting times when sending my BTC as I'm hodling anyway, but if the fees are very high (btw do they scale with the amount of bitcoins?) and if there's any potential risk involved, I'd rather not send them anywhere.

EDIT: So Electrum 2.9.3 also freezes when I try to create a new wallet, and coinomi doesn't seem to have a desktop app ...

Coinomi should let you "sweep" all the coins... But only into Coinomi, you'd then need to send to the Ledger (effectively two transactions for each coin, not a big deal for BCH or BTG but likely expensive and long wait time for BTC)

Electrum (https://download.electrum.org/2.9.3/) will let you import for BTC
ElectronCash (https://electroncash.org/#download) will let you import for BCH
I'm only aware of BitcoinGold Core (full blockchain download reqd) for BTG as a "trustworthy" wallet: https://bitcoingold.org/downloads/

I'm using Windows 10 and I tried the latest Electrum Version (3.0.3). Maybe I'll try 2.9.3.

And I want to use a hardware wallet, I already ordered the ledger nano s yesterday, I should get it tomorrow. But i need to transfer my BTC (and BCH and BCG) to the ledger, so I need to transfer my private keys to a new wallet first (preferably one that supports BTC, BCH and BCG) and send it from there to my ledger.

So I really only need a trustable Software wallet, from where I transfer my btc, bch and bcg to my ledger wallet.

What operating system you using and what version of Electrum you try to install?Latest stabile version for Windows 7&8 is 2.9.3 and if you are using Windows 10 then you can use version 3 of Electrum.

Also check that something on your PC is not blocking Electrum,like antivirus or firewall.For other good software wallets better check here on forum,most of users use Electrum or hardware wallets-but if you have enough space on your hard drive you can always try Bitcoin Core.

Always double check that you download files from the original source,there is many sites with fake wallets.

Ok I managed to recover my wallet, now I want to transfer those bitcoins to a new wallet (preferably by importing the private key to a new wallet) and I wanted to use electrum, but it always freezes at a certain point when I want to create a new "default wallet".

So is there another good software wallet where I can import the MBC keys?

Ok, so I've been out of the loop for a while now. I bought 0.5 bitcoin back in ~2014 and stored them on a Multibit Classic wallet (version 0.5.18, I think) on my old laptop. I then made a (password protected) backup of the wallet and stored it on different storage devices.

I still have those backups (and the password) and now I want to transfer these bitcoin to a hardware wallet (like trezor or nano s ledger)

I searched a little through the forums and from what I understand I would first have to download the old MBC 0.5.18 client, then recover my wallet (with my password) and then either directly send them from there to another wallet or - from what I understand the better way - export the private keys again (but this time without password protection), and then import them into electrum.

And then I could send them from electrum to my hardware wallet (I would have to do a little follow up reading on how to do that properly, but I guess that won't be too difficult).

Is this how I should do it or did I overlook anything? Or is there a better or simpler way to transfer my coins to a hardware wallet?


PS: Oh and I also want to claim my BCH and possibly my BCG, do I automatically gain access to them when I import my keys into electrum? If not, how do I gain access to them?

Also, last and least, can anyone recommend either the trezor or the nano s ledger?

I know, these are a lot of questions, but many many thanks in advance, I'll gladly tip anyone providing help with BTC, BCH or BTG if I manage to recover everything!