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1181
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Bitcoin / Development & Technical Discussion / Re: How to learn bitcoin software development without downloading whole Blockchain
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on: October 27, 2018, 02:52:49 PM
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Enable pruning? You can set Bitcoin Core to only use X amount of GB/MB. -prune= Reduce storage requirements by enabling pruning (deleting) of old blocks. This allows the pruneblockchain RPC to be called to delete specific blocks, and enables automatic pruning of old blocks if a target size in MiB is provided. This mode is incompatible with -txindex and -rescan. Warning: Reverting this setting requires re-downloading the entire blockchain. (default: 0 = disable pruning blocks, 1 = allow manual pruning via RPC, 550 = automatically prune block files to stay under the specified target size in MiB) To enable pruning use the above command in your bitcoin.conf (If you don't have a bitcoin.conf yet, simply create one.) Anything above 550 will work. So if you put 1000 It'll use a maximum of 1GB. (If every block were to be 1 MB that is) I've bought Antonopoulos' Mastering Bitcoin and there he states that you can install Bitcoin Core and configure it to reduce the size of the blockchain by discarding old blocks, but that it will still download the entire dataset before discarding data (page 38).
I don't think this is true. I'm pretty sure it'll discard data as you go. |
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1182
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Other / New forum software / Re: Responsive forum?
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on: October 27, 2018, 02:03:36 PM
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Will u fix the forum to be responsive for cellphone users?
Yes, Epochtalk is responsive. Try it yourself, visit https://beta.bitcointalk.org from your mobile device. Wow, so this means that the new forum could be like some social media apps that will notify one if there will be some replies on the topics you were in for a discussion? This is really great. I can't wait for the implementation this new forum for cryptocurrency discussions. I think this is indeed a feature in the new forum. Really though, something like that should've been implemented in the current forum a long time ago already. It's long overdue.
The new forum is running on AngularJS, which has just entered LTS, since Angular 2.0 is now the new "standard". This shows that the new forum software is already getting slighly out of date before it's even released...??  |
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1183
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Bitcoin / Bitcoin Technical Support / Re: noob question about `bitcoin-cli getnewaddress`
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on: October 27, 2018, 11:08:43 AM
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OP is using Bitcoin Core, as seen in headline of this topic.
You can generate an address however many times you like. Each time you run that command on newer versions of Bitcoin Core, you will simply get an address that was already generated in your wallet (HD wallet). You have couple of hundreds, I think, already generated and another batch is likely generated once these run out.
Is this actually still the case? Does bitcoin core still use the keypool to store X amounts of adresses? That seems.. unnecessary? Why not just generate them when needed using the xprv? Is this done simply because it was easier to implement, or is there some kind of reasoning behind it? |
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1184
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Economy / Exchanges / Re: Lost my "12 Word Phrase / Seed" for coinbase commerce - Need help
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on: October 26, 2018, 08:18:42 PM
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>> My key is in bip32 (I got this information our of my wallet-file). Does that matter ? I used this website http://bip32.org/ to decode the xprv key from the wallet file to a shorter one. Don't use such sites ever again when dealing with private keys that may or may not have actual balance.. http://bip32.org/ might be open source, but that doesn't mean that it is safe. It doesn't even have HTTPS. What you can try is the following: (Emphasise on try , as i highly doubt that this will work) Download this library: https://github.com/ethereumjs/ethereumjs-walletput the extended bip32 privkey in there and generate a couple of private keys + their corresponding adresses. Depending on the derivation method used by coinbase, you might find your balance. It's worth a try.
-snip-
Would that also be possible with just an xprv? I don't think OP has any "normal" private keys. (Forgive my ignorance here, just wondering. ) |
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1186
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Other / Meta / Re: sent the wrong bitcoin to the paid address of the forum,
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on: October 26, 2018, 04:23:48 PM
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At the very least you’d need a signed message from the sending address I would think.
Why? Every adress is unique for each user. We are commonly asked how we know that you sent a payment. The address above was newly generated just for you, so when any BTC is sent to it, we will know to credit it to your account. It is all automatic. It seems highly unlikely that someone else send bitcoin to ( it) -> referring to his adress specified for his Copper Membership? I'm pretty sure theymos could check whether or not that adress is connected to his account. The only way (As far as i know) that that would be possible if is someone else also had access to his account. I sent it from a trading floor
Which means that he most likely doesn't have access to the keys belonging to the adress. |
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1187
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Other / Beginners & Help / Re: Your favourite Crypto Exchanges
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on: October 26, 2018, 01:53:32 PM
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I have done trading in exchanges like binance, kucoin, mercatox, etc...
Can you post your favourite crypto exchanges you are trading without any problem?
That seems rather useless. There's already dozens of threads about this topic, or about any notable exchange really. Anyhow, if you want to trade BTC -> Altcoins, i don't see why you would use anything other than Binance for popular altcoins. USD -> BTC i'd personally use Coinbase/Bitstamp, (although i'm not that big of a fan of them either) considering all the issues bitfinex and kraken have. |
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1188
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Bitcoin / Development & Technical Discussion / What's going wrong here? Different privkeys from same XPRV.
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on: October 26, 2018, 12:12:13 PM
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Okay. I start with generating an bip32 xprv from https://iancoleman.io/bip39/xprvA1spA8iHkXqJwZHPeiEFDUkzmqgnF4LRLzDrioV98peEs2ykDutTjunz1H1jdiaPjMWG8ae6PornnWoDAZfw15xxkxqk4tJoa5Tn4yZJ1x4 m/44'/0'/0'/0/0 1Bc7RvUdCSHEZmyXkdwTe1JYEFLdd3ebvw 024d27c803e9cb8092021bb74643e188233e0985be5b7130e6b0966dce6458d4f2 KxXviT8QiwyeRT4KP2cQjjSMPSQKTEhsGvGdQtGoxK4sRQZTsbLj KxXviT8QiwyeRT4KP2cQjjSMPSQKTEhsGvGdQtGoxK4sRQZTsbLj From WIF compressed to HEX; 27355B317CD6FFE47062B03BF2E9E01D8E31B0ADBA76F442A05BBF5F1B57208E (Gives the following ETH adress ) 0xEeC8a7981F2C9Eb03e2E8Ff1a915fa3E00367D94 I use the xpriv key in ethereumjs-wallet - https://github.com/ethereumjs/ethereumjs-walletvar hdkey = require('ethereumjs-wallet/hdkey');
var extPrivKey = 'xprvA1spA8iHkXqJwZHPeiEFDUkzmqgnF4LRLzDrioV98peEs2ykDutTjunz1H1jdiaPjMWG8ae6PornnWoDAZfw15xxkxqk4tJoa5Tn4yZJ1x4';
var hdwallet = hdkey.fromExtendedKey(extPrivKey);
var wallet = hdwallet.getWallet();
var address = wallet.getAddress();
var privatekey = wallet.getPrivateKey();
console.log(`Address: 0x${address.toString('hex')}`);
console.log(`PrivateKey: ${privatekey.toString('hex')}`);[/size]
Code used for generation of m/44'/0'/0'/0/0 (?) - (Is this correct? it should generate the same index=0 as above tool, right?) Gives; Address: 0x03b82ba80f68502ee1f73e53a42175a89e718b66
PrivateKey: e174a4f2bc96cf67342c1bab1bfffa283c7a98cd08c61d6e829cdf683c13a844
Why are they different? - Am i missing something in their respective derivation methods?
This might not be the right section. Please move if it's not the appropriate section. |
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1189
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Bitcoin / Electrum / Re: NEED HELP!!! 6000 is locked in a watch only account on electrum
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on: October 26, 2018, 10:39:35 AM
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I thought that watch-only wallets are actually mirrors of your existing wallets that you already have the private keys off.  Is it not a way to keep track of your transactions without actually logging in to your actual wallet where you are keeping your bitcoins? Someone fill me in please. Yep. That's exactly what he did. He simply imported an adress, resulting in him only being able to see balance/transactions. @OP if someone "sold" you that adress, you got scammed. I made an account quickly and pressed imported wallet instead of standard wallet and I received 1 Bit. It never asked me to make a seed or password. And it says its watching only and I have no seed or key, but I have about 6 grand in this account. Is there a way where I can get the money to a standard wallet account or did I lose 6 grand because I pressed the wrong Wallet type.
It's not your money. You have no seed or key. (Just an adress?) Which everyone can have. So you didn't really "lose" anything, as it wasn't yours in the first place. Unless ofcourse, as i stated above, you "bought" that adress from someone. |
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1190
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Bitcoin / Development & Technical Discussion / Re: How to verify transactions?
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on: October 25, 2018, 06:43:50 PM
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Anyone?
You can use a block explorer such as https://blockchair.com/ to see if those transactions actually happend. But even then, you should be cautious. He could've simply taken/snapped those transactions from a node (depending on his business model). ( A lot of HYIP sites do this. (I do hope that's not what you're trying to buy here!)) If you really want to make sure that the "company" made those transactions, ask them to sign a message from the adress that the output was made from. https://bitcointalk.org/index.php?topic=990345.0(And then ofcourse verify it.) Although, if you gotta ask this, i'm pretty sure something is fishy.
What exactly are you trying to buy? An exchange? A gambling site? If so, you could check their traffic sources using https://www.alexa.com/siteinfo or SimilarWeb as well. |
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1191
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Other / Beginners & Help / Re: Do not send bitcoins to extortionists
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on: October 25, 2018, 05:46:10 PM
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I found this interesting site that I was not aware of called Bitcoin Abuse Database ( https://www.bitcoinabuse.com) where people report scam attempts (similar to those sites that do it for phone numbers). Specifically, searching for the scammers BTC address listed in the OP, there are 87 reports created between today and yesterday alone. Seems like a good initiative that, if used extensively, should help quite a few from taking the plunge (not that it isn’t clear from the beginning though in this case). That seems pretty humble, but rather useless? I'm pretty sure if that site becomes anywhere near mainstream scammers will simply use a fresh adress for each scam attempt, won't they? |
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1194
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Economy / Exchanges / Re: Lost my "12 Word Phrase / Seed" for coinbase commerce - Need help
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on: October 25, 2018, 01:52:24 PM
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That would be easy... in my case the field "seed" is greyed out  I'm not entirely sure what you're trying to do. At the start I just used "electrum" wallet to receive bitcoin. This wallet still exists and is usable (I have access to my BTC at coinbase commerce). Did you download and use electrum externally, or is it implemented IN "Coinbase Commerce"? I'm rather confused since you first mention you use Electrum, and then say you still have all your bitcoin in "Coinbase Commerce".
Or did you "import" that seed into electrum, and then forgot what the seed was exactly, is that it? The weird thing is that "electrum" offers a method to read out my "seed / 12 word phrase" but for this wallet its "greyed out". Even in the wallet file the line called "seed: ......." isnt existing.
BUT the wallet is working. I could transfer my BTCs from it to another wallet and I still receive new payments there successfully. Its not "readonly". How did you create this electrum wallet in the first place? Did you import the keys or the seed? If coinbase delivers the same mnemonic seed (12 word phrase) for alle currencys (ETH, BTC, BTC-Cash, LTC) could there be a chance, that even the private (WIF-Key) could be the same and could be used for other currencys as well ?
Yes. LTC & BTC-Cash are both "forks" of Bitcoin. (Well LTC isn't really, a fork i think, but it's basically a copy of BTC too.), and thus they work the exact same way as BTC. Ethereum also uses SECP256K1. Which means that you can use a "BTC" generated private key to generate an ethereum adress as well. See https://ethereum.stackexchange.com/questions/6520/can-i-use-the-same-private-key-for-ethereum-and-bitcoinBut if that key will actually have any balance.. I'm not so sure. That seems pretty unlikely.
EDIT: I just tried the following; I generated a extended private key using https://iancoleman.io/bip39/. xprvA14zZuN9cNGz4p7csu5mgkiwHAZf55NHeAFwihowKfHvkv5GHhjxejpLRgiLqH4us3sEXy7D3h6TMHtQ6Mc5nxWttQD4r98susQzdQsVg9K I then imported the xprv key into https://www.mobilefish.com/download/ethereum/hd_wallet.html ( DO NOT DO THIS WITH YOUR ACTUAL KEYS, ALWAYS CHECK THE SOFTWARE YOU'RE USING!) Which gives the following *first* public key; Public key: 249536cfb9a2629e98c65f6f240e53e0cc1e986a8606a75f0081512895443aea273176ef5e40702d87447f89cb87e1cd959ca7e30682ffdc67d6b8b95805cc39 Which if you "decode" the first private key in https://iancoleman.io/bip39/Kxepdb6GhDUSxrGeASofQYY4mahVSgE9YcfW3CjBiutHu1L6HTeU Using https://iancoleman.io/bitcoin-key-compression/Gives; 04249536cfb9a2629e98c65f6f240e53e0cc1e986a8606a75f0081512895443aea273176ef5e40702d87447f89cb87e1cd959ca7e30682ffdc67d6b8b95805cc39 Is the same? So yeah, if you have a XPRV key, you should be able to generate your ethereum adress from that. |
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1195
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Economy / Service Announcements / Re: Bitupper BTC Block Explorer | SegWit support (bech32)
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on: October 25, 2018, 11:14:23 AM
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Error 1005 Access denied
What happened?
The owner of this website (bitupper.com) has banned the autonomous system number (ASN) your IP address is in (12345) from accessing this website.
My IP is banned.. Seems like you have cloudflare configured to block every VPN/Proxy? You might want to reconsider that? That's a lot of potential traffic being lost for no reason really. ( Or not,  , it's up to you really. I won't mourn about it.) |
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1196
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Other / Meta / Re: Can we establish a division for posters according to their quality?
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on: October 25, 2018, 10:44:55 AM
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The idea isn't good at all. If you need to create a special badge to point out "good" posters, something is going very wrong. I have an own concept for those who are not shitposters and not exceptional posters, so they fall into not bad, OK, and good poster categories, but it is just a rough idea.
What the hell happend to this forum being moderately libertarian? Why do you have to categorize everyone? This is exactly the type of stuff that's so disgusting about present-day politics. Merit in itself is already pretty silly -- (You'd think that everyone posting here would do so in a moderately constructive way, right?), but adding "badges" to ascertain good and "Bad" posters seems extremely childish to me, and it makes me wonder why/if this (is) still (is) a crypto/bitcoin related forum. What's next? Someone's going to grade my last 100 posts? |
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1197
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Bitcoin / Development & Technical Discussion / Re: What is colored coin in layman terms?
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on: October 25, 2018, 09:22:18 AM
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Recently I come across the concept of colored coin. https://bitcointalk.org/index.php?topic=347398.0It says some extra metadata is put in bitcoin blockchain to make it colored. That extra metadata always associated so that it will always be identified. 1. How this extra metadata is introduced? 2. Is it really a useful concept? There have been some other threads about this; Might be worth reading. https://bitcointalk.org/index.php?topic=214316.0And: https://bitcointalk.org/index.php?topic=106373.0By the original design bitcoins are fungible, acting as a neutral medium of exchange. However, by carefully tracking the origin of a given bitcoin, it is possible to “color” a set of coins to distinguish it from the rest. These coins can then have special properties supported by either an issuing agent or a Schelling point, and have value independent of the face value of the underlying bitcoins. Such colored bitcoins can be used for alternative currencies, commodity certificates, smart property, and other financial instruments such as stocks and bonds. https://github.com/bitcoinx/colored-coin-tools/wiki/colored_coins_intro
Would something like this still work? How exactly do i broadcast this? Using the testnet? Do i need a "color-aware" wallet? -- https://github.com/Colored-Coins/cc-transaction-builderDo those wallets even exist still? The entire implementation looks rather depreciated?
2. Is it really a useful concept?
It seems like it could be very useful, if implemented correctly, as explained above, but i haven't seen any projects apart from USDT (or XCP according to [1]) worth noting that use(d) colored coins. Perhaps because there are better and easier alternatives available. (such as ERC20?) [1] https://bitcointalk.org/index.php?topic=5004218.msg45203731#msg45203731 |
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1198
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Bitcoin / Development & Technical Discussion / Re: about create personal coin api
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on: October 24, 2018, 07:07:25 PM
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As its mentioned above, it is possble to create a personal coin. But the question is for what ? May be you personally created coin means that you can something get from it. But to be honest i cannt actually understend the reason of this need. Could anybody answere me ?  will be very glad to make it more clear I think he worded it quite badly (but the answers above should already give you an answer) and is actually referring to an API to make/facilitate transactions, for his business or w/e reason. (As opposed to making an entire new altcoin for whatever purpose..) |
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1199
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Other / Beginners & Help / Re: is the bitech-mining.com website reliable for buying asic miner ?!
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on: October 24, 2018, 06:09:46 PM
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can anyone suggest me some reliable websites to buy dr3 antminer . sadly in bitmain website its out of stock
I don't think Bitmain has any official resellers. So unless you want to pay a premium for a product that might never arrive, or arrive used/broken, it might be better to wait for their next batch. (Or even better, buy from their competitors.) |
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1200
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Economy / Service Announcements / Re: [ANN] [EXCHANGE] Polyx - Cryptocurrency Exchange
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on: October 24, 2018, 05:20:24 PM
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I have some questions: - Who is the owner of the exchange? - Where the exchange is located: (country, street, city) - Do you have license? Why this: " Whois Privacy Corp. "; " Domain Admin " Registrant Name: Domain AdminRegistrant Organization: Whois Privacy Corp.Registrant Street: Ocean Centre, Montagu Foreshore, East Bay Street Registrant City: Nassau Registrant State/Province: New Providence Registrant Postal Code: KYC is required only for deposit and withdraw operations with fiat. You remain anonymous, but customers can not be anonymous. You can find legal info via the link: https://polyx.net/static/docs/EN_Privacy_policy_V02.pdfThat wasn't even close to an answer for his question. I bet that that entire doc is copy pasted from someone else, and you simply pasted your exchange's name in it. The only thing that referred to an adress was this; OÜ: Harju maakond, Tallinn, Lasnamäe linnaosa, Punane tn 56, 13619
Also, what the hell is this in your User Agreement?  "If we one day decide to shut down, it is your fault for storing funds with us and there is no way we can be held accountable!" is basically what it comes down to.. That seems pretty shitty? Shows how much trust you have in your own infrastructure.. ? |
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