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6

How does a miner verify that the funds are available and not already spent without iterating through the entire Blockchain? Full nodes do iterate through the entire blockchain, but only once. As they work through the chain's history, they create and continuously update a 'UTXO set', which is just basically a list of all valid coins. With each new block, the ...


4

This is mostly not correct. First of all, the address is a hash of the public key only. Also, if one has a private key, the corresponding public key can be computed directly. So the most straightforward brute-force attack looks something like this: Pick a number to use as a private key (an integer between 0 and 2^256, roughly) Compute the corresponding ...


3

Tl;dr: Bitcoin is cash, not a bank account. Mints don't keep track of which people hold each of their coins or how much of their cash each person holds. Mints provide users of their coins with some ways of distinguishing genuine coins from forged coins. How are funds verified? They aren't. The Bitcoin network doesn't know about or care about funds. It ...


3

How does a miner verify that the funds are available and not already spent without iterating through the entire Blockchain? In order to know all the unspent transaction output you need the entire blockchain. This is what "full nodes" do. Full nodes look at the entire blockchain all the way back to the genesis block. "Simplified payment ...


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You could look into posting about your project in the Einsteinium community. The coin is designed specifically to help fund science projects and research. http://einsteinium.org/ https://bitcointalk.org/index.php?topic=494708.0


2

If you have a custodial account with Exchange.blockchain.com, you must contact them for help. They own the money, not you ("Not your keys -- not your bitcoin"). If you have a non-custodial wallet downloaded from Blockchain.com, you should normally recover control over your money by restoring the wallet from a backup or from a safely stored record ...


2

If you're willing to buy BTC on Coinbase to xfer to BTC-e, when you want to cash out wouldn't you just trade over to BTC on BTC-e to xfer to Coinbase to sell for USD then withdrawal?


2

I use their support Bitcoin wallet address instead of using my wallet Tell them you sent them money by mistake, mention the transaction ID, and ask them to send you the same amount back (less transaction fees). How you do this depends on who they are (and whether you know who they are). Since there are no Bitcoin police and no-one in charge of Bitcoin, you ...


2

Spendable funds in Bitcoin are tracked in the form of Unspent Transaction Outputs (UTXOs). Each transaction consumes some existing UTXOs in the inputs, and creates new transaction outputs to assign recipients funds. Every full node keeps track of the entire set of spendable balances in a datastructure we call the UTXO set. While you can think of the ...


2

With Zebpay, you can sell directly and get your INR. You do not have to wait for a third party to buy your bitcoins like in a typical exchange. I believe it is same with Coinbase to sell and get USD. Sandeep Goenka, co-founder, Zebpay.


1

I am using perfectmoney there for funding there and it goes always instant to get credit my account balance, i think that is nice method to use there.


1

To be completely safe, you should throw away every piece of information and data to do with the old wallets used or accessed by the scammer. user-ids, passwords, recovery phrases, backups, keys, addresses and anything else that is related to anything the scammer had access to. Those wallets and the keys in them are forever unsafe. Even if you reset passwords,...


1

If Blockchaindotcom follows the Bitcoin standard of BIP32, then the 12 words should allow you to recover your funds on any wallet. You can try downloading Bluewallet and recovering the wallet there. You do not need to "import addresses" to access your funds, as long as you have your private keys (which are derived from the 12 words).


1

Short answer: No. MtGox assets are currently frozen and they have lost a lot of customer funds, both fiat and Bitcoin. Until further notice you can consider your euros lost. Contact your lawyer and ask them to write a claim to official MtGox address. Also some local Bitcoin communities are preparing class-action (or similar) lawsuits against MtGox and its ...


1

I had the same trouble adding funds to btc-e. Best way to do it is using a wiretransfer. They give you the information you need for your bank to send funds to your account on btc-e. However the way I added funds is this creat an account with www.virwox.com . You can add USD from your credit card onto your account on the website. From then you have to trade ...


1

what should i do  It depends whether you have a Blockchain.com account or a Blockchain.com wallet. If you have a Blockchain.com account, contact Blockchain.com support. If you have a Blockchain.com wallet, check the transaction history and find the Bitcoin addresses which held your money. You can then check those addresses in several different blockchain ...


1

It sounds like the problem may be that the new wallet derived a different type of address from your private key. Normal wallet function will present you with a new address each time you receive coins. Each of those addresses will have an associated private key, that needs to be used to spend the funds. Note that the same private key is not used to derive ...


1

Channel funding (and the distribution of funds) is determined at the time of channel opening. Once opened, a party cannot ‘add funds’ to the channel, this would require opening a new channel. If you opened the channel and did not specify that some number of sats should be pushed to the remote node at the time of opening, then the channel will open with the ...


1

BEAM had a private pre-sale, selling tokens to investors. They do not publish any of this information, but in their telegram and elsewhere there were estimates of 25 cents per token for a total of ~5 million dollars. They say on their site they did not do an ICO, when in fact they did do a private ICO, which are by definition less tranparent and fair than ...


1

There are many investors of this project. INVESTORS Lemniscap Investor of Beam Mimblewimble Node Capital is investor at BEAM Mimblewimble yeomans capital Investor of Beam Mimblewimble PROTOS asset management Investor of Beam Mimblewimble youbi capital Investor of Beam Mimblewimble Alternity is investor at BEAM Mimblewimble 1KX Investor of Beam ...


1

This is purely an internal accounting move, no keys are involved. Their comparison to a hot/cold valid is likely just an analogy. In reality, their application layer (or some middleware) enforces some checks to make sure you can only trade values inside your trading account. When you transfer funds between them, their internal database accounts are updated....


1

Is there a minimum limit of bitcoin that can be added into a channel during the initialization? According to the Lightning Network Specifications: "The amounts for each output MUST be rounded down to whole satoshis. If this amount, minus the fees for the HTLC transaction, is less than the dust_limit_satoshis set by the owner of the commitment ...


1

There are many possible explanations and many possible ways to investigate Possible causes The sender mis-typed the receiving address. This is hard to do if the sender scanned a QR code. There are usually checksums built in that make it hard to get a mis-typed address accepted. Nevertheless it is possible You gave the sender a different address than the ...


1

An Investor's Business Daily article discusses why GBTC's value does not match the value of the Bitcoins held in the fund. It says that GBTC is not an ETF - it is a grantor trust. It is not registered with the SEC [...] and it doesn't trade on an exchange. It trades on the over-the-counter market, which has less stringent participation rules than ...


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If you are having a hard time syncing (maybe poor internet connection?) , try getting all your private keys using the API command "dumpwallet" and then importing them into the Electrum wallet ( there will be an option to import private keys when starting a new wallet, and import private keys into an existing wallet). Electrum, available at https://www....


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