Questions tagged [address]

This tag should be used for Bitcoin addresses. A Bitcoin address is an encoding of the hash of an ECDSA public key or a script. Knowledge of this value allows a user to send Bitcoins to another person over the network. Bitcoin addresses begin with a '1', '3', or 'bc1'. Not to be confused with mailing addresses or IP addresses.

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5
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4answers
2k views

Is vanitygen a problem for bitcoin?

Considering the amount of users of vanitygen, and the fact that each user is generating millions/billions of bitcoin addresses, won't we run out of bitcoin addresses soon? What would happen if we did ...
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1answer
778 views

Can I send bitcoin to other address in my wallet to provide anonymity?

I want to buy service Z. I have 2 addresses in my bitcoin wallet: aaa and bbb. I buy 1 bitcoin from coinbase and tell coinbase to send them to aaa. Now I send them from aaa to bbb. No one else ...
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1answer
4k views

What is the maximum of receive addresses the default wallet can handle?

I guess there is no limit. But on tests, what is the maximum before the bitcoind start to slow down in a specific machine?
2
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1answer
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Need sample compressed and uncompressed Public / Private key pairs for BigInteger

I am testing a different version of BigInteger that has different endian formats and the native implementation likes to add or remove zeros from the final output. Can anyone provide some sample ...
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1answer
1k views

What is the algorithm for generating a Ripple address from a ecdsa public key?

I know it is some combination of sha256 and ripemd160 that is used on the public key component to obtain the Ripple wallet address, but what is the specific algorithm?
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4answers
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How to find a specific bitcoin address from all the addresses?

Recently, I found a site that show all the addresses in a huge list, divided in 904625697166532776746648320380374280100293470930272690489102837043110636675 pages. The site's link is http://directory....
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2answers
2k views

Import multiple watch-only addresses using importaddress?

With the importaddress RPC command it is possible to import one watch-only address. But how can I do that with, let's say, 100?
4
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2answers
252 views

Is there a reason big Bitcoin companies wouldn't use only SegWit transactions?

As I understand, SegWit allows anyone to create a SegWit address where they can send their bitcoins and transact from that wallet just as easily as they would with a traditional address. The SegWit ...
4
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2answers
6k views

How long does it take for an exchange to send me bitcoins?

I'm not sure I understand all of the bitcoin storage options I know there are bitcoin addresses and bitcoin wallets what is the relationship of an address to a wallet? is a wallet mandatory and a ...
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2answers
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Is this how to generate a bitcoin address with python?

So I have already the public key. My question is if I'm applying correctly the b58 encoding, since bitcoin uses b58check, and also adds x00 prefix. Can somebody explain me that? Thanks. import ...
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1answer
690 views

Lookup Full Address For Casascius Coins

Can anyone tell me how I would check the public address on my old Casascius Bitcoins? I have 3 total cons but I am unable to find where or how to check the public addresses on the coins for they only ...
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3answers
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ECDSA x,y coordinate validity verification doesn't seem to work

The ECDSA algorithm, secp256k1 for Bitcoin allegedly uses the equation y ^ 2 = x ^ 3 + 7 mod P to determine the validity of an alleged point upon the elliptical curve. Utilizing http://web2.0calc....
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Is it possible generate three public key( address ) by only one private key?

I hear that each address has one private key. Is it possible generate three public key address by only one private key?
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1answer
247 views

Can you help me fix this address?

I just got this address: 1a8LDh3qtCdMSAgRXzMr4zB8w1EG4h1Xi, but the checksum doesn't validate. Can someone help me fix it by changing some characters that look/sound similar?
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2answers
516 views

How can I refund money that I sent to an address?

I sent a little money to this address 19RTgakS1WZP172vZwn44HnJAKU8ZQcJxm and they said that this link was allready used by someone else. Now he is saying the bitcoins were sent to no one and that they'...
26
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1answer
16k views

How secure is blockchain.info?

How secure is using a wallet on blockchain.info? How do you evaluate the different sites that provide wallets?
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2answers
5k views

The Bitcoin.it wiki says addresses do not carry balances…but all info suggests otherwise

The Bitcoin wiki states, "Addresses are not wallets nor accounts, and do not carry balances." Yet, there's a zillion articles online about Bitcoin address balances, the Bitcoin blockchain explorers ...
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2answers
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What's the difference between `z-addr` and `t-addr` type addresses?

I was playing with the zcash testnet and figured there are two different types of addresses available: z and t. Is this a privacy feature? What's the difference between z-addr and t-addr type ...
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3answers
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Why does Bitcoin support both compressed and uncompressed keys/addresses?

My question is about the difference between compressed keys and addresses, and i know it was addressed in another question but my question is less about the theory and more about how the keys are used ...
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5answers
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Is there an easy way to give people a Bitcoin address?

I see that Bitcoin addresses have built in checksums that helps prevent typos (ie. it is highly unlikely that you can mistype a Bitcoin address and have it still be valid). However, I still think the ...
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4answers
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How are different Addresses generated from the same Private key?

I was reading in the "Technical background of version 1 Bitcoin addresses" that addresses are a function of the private key. More or less: Private Key -> Public Key -> Address If the Public ...
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2answers
106k views

Where can I see my Bitcoin address?

I use the original client, but I don't know where can I find my Bitcoin address. Can someone help me?
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7answers
9k views

What is the longest known vanity address generated?

Anyone can generate a vanity address of arbitrary length with appropriate tools, it's just a matter of performing enough computations. What is the longest known vanity address anyone has generated?
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5answers
12k views

How to validate a Bitcoin address is a real one?

Is there a code snippet that validates a bitcoin address? I'm looking for both javascript and java snippets. The code should support both testnet and real addresses.
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4answers
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How to generate keypair completely offline?

Is it possible to generate address and private key pair completely offline, using only dice / other random number generators, calculators, paper and pen? If yes, whats the procedure and formulas used?
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1answer
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Why vout->addresses in getrawtransaction is a table

I am reviewing Bitcoin transaction data as are returned by 'getrawtransaction' bitcoind command. I wonder why field: vout->addresses is a table and why it allows more than one address to be associated ...
9
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1answer
578 views

Different ways to encode Bitcoin Address

What are the different ways to encode a Bitcoin Address (both private and public) and how are they calculated? I've heard of things like firstbits, mini private key format, and I`d like to know how ...
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2answers
426 views

Sending and Receiving Mechanics

I'm new to Bitcoin and am considering allowing people to pay for my software with them. Before I continue I would like to clarify some things. My googling did not get me the answers I was after. I ...
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2answers
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How do you delete an account in Bitcoin Core?

I am attempting to allow multiple bitcoin addresses to be created per account, but how can I delete them using the standard API? There doesn't seem to be a function for that. E.g. the acccount "Test" ...
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5answers
402 views

As a small hotel accepting bitcoins, do I show only one payment address?

I am currently accepting bitcoins as payment at my hotel, but I am uncertain about the payment address(es). I prefer to avoid payment service such as BitPay and Coinbase to mention a few. At this ...
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2answers
2k views

Is a wallet just a collection of private and public keys?

There is a fundamental bitcoin concept I don't get. Am I correct in that all I "need" to send and receive money are a single address and its associated private key? In other words, can't I just ...
14
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5answers
658 views

Why does the standard Bitcoin client not display the balance per address?

Any Bitcoin wallet holds several bitcoin addresses. Such addresses are either generated manually from the GUI addressbook or automatically collecting the "change" of a "Send" transaction. The total ...
13
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1answer
5k views

How can I use the vanity name generator to look for an address?

How do you use the vanity name generator to look for an address? Is there an estimate on how long it takes to find addresses of varying lengths and complexities?
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5answers
3k views

What would happen if you send bitcoins to a non-existent Bitcoin address?

If one were to send bitcoins to an address that has not been created yet, what would happen? Would the coins be lost forever? Would they just sit there until the address and key pair are generated?
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1answer
1k views

What are the potential attacks against ECDSA that would be possible if we used raw public keys as addresses?

According to this answer about why addresses are hashes rather than public keys there are potential attacks that are possible if you have the public key rather than the address, what are these attacks?...
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1answer
4k views

Bitcoin script example

Is there some good example on how to process a basic tx's scriptsig and get the recipient's address from the raw transaction?
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3answers
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Pseudocode to verify a signed message

Can someone explain or point to some documents with pseudo code that would show me how to verify bitcoin address based on a signature and message. I know how to do this in clients I want to know how ...
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3answers
12k views

Is it possible to use xpub address to monitor balance from previously generated addresses?

I'm trying to find a way where I can view balance of my ledger nano s wallet without always attaching it to computer all the time. I found something called xpub address which allows me to generate ...
6
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1answer
1k views

If addresses are hashes of public keys, how are signatures verified?

I've skimmed through the https://en.bitcoin.it/wiki/Protocol_specification and it seems that when sending someone bitcoins, I would sign the transaction data (not quite sure which parts exactly) with ...
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6answers
3k views

Can you generate bitcoin addresses without storing a private key?

Suppose you have a possibly compromised system, which you do not trust enough to stores your private keys on. Is there some process where you can generate unique bitcoin addresses within the system, ...
4
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3answers
161 views

Are generated public/private keypair the most random possible?

The number of possible Bitcoin private/public keypair is very strong (2^160 which is 1,461501637×10⁴⁸). However, if the random generator is not good enough, only a subset of all that "space" could be ...
4
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1answer
578 views

How is a Ripple address constructed?

How is a Ripple address constructed? Is it similar to how a Bitcoin address works albeit with a different net byte, or are there some more differences?
4
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1answer
458 views

What are the weakest cryptographic guarantees in Bitcoin?

I read in this Github pull that Bitcoin relies on weaker cryptographic guarantees than SHA256. What are the weaker cryptographic guarantees being referred to? Could it be that RipeMD is 160 bits? ......
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1answer
3k views

How balances are calculated?

Is it the case that the blockchain has information on the balance associated with each public key-address, such that the client on my PC, say, will look at every public/private keys pair in wallet.dat,...
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1answer
158 views

Confusion about Addresses

I have a little bit confusion about addresses segwit and not segwit. I can see P2WPKH and P2WSH from this link https://en.bitcoin.it/wiki/BIP_0173, and they are segwit and start with bc (mainnet) or ...
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1answer
1k views

Electrum Error Message “22”

When I try to send BTC from my Electrum wallet address to one of my unused addresses in Electrum, just as a test, it comes up with an error message (U'message':u'TX rejected, U'code':-22). I'm using ...
2
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1answer
398 views

Creating a new electrum 3 wallet file with an imported segwit private key

I have a segwit private key that I generated from another app. How can I create a new electrum wallet file with just this private key in there? I tried creating a new electrum 3 wallet with this ...
2
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1answer
11k views

What's the relationship of Bitcoin addresses to public keys?

A Bitcoin wallet can handle multiple private keys. In ECC, you can have 2^256 private keys, and for each key, you can have 2^256 public keys. Assuming that's right (please correct me if I'm wrong), ...
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1answer
1k views

How to generate a native Segwit address and P2SH Segwit address from a standard WIF?

Can I have the steps to generate a native Segwit address from a standard WIF? And the steps to generate a P2SH Segwit address from the same WIF? How do these two formats differ and why are there two?...
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0answers
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Can Ethereum support compressed secp256k1 public keys to compute Keccak addresses? [closed]

Starting from a private key, a working functional example provides details for how an Ethereum address can be calculated from an uncompressed secp256k1 elliptic curve public key. This functional ...