All Questions

Filter by
Sorted by
Tagged with
1
vote
2answers
31 views

How does vin[] have to look like with multiple inputs in a raw transaction?

I've successfully created, signed an broadcasted a raw transaction. But this transaction had just one input. Now I would like to create a raw transaction where I take the funds from multiple ...
0
votes
1answer
20 views

How to manage externally created addresses?

In my application the private keys are created and stored on a HSM. When a new private key is created on the HSM, it returns the corresponding public key. With this public key I create a bitcoin ...
0
votes
1answer
26 views

How to be assured a wallet is on a blockchain?

How could I check that a wallet or any app I download from Google play or Apple store or a website is truely runs by a blockchain and be certain that producing company can not manipulate the private ...
0
votes
1answer
46 views

RegTest with mainnet addresses

I am trying to run a private Bitcoin network for testing. I tried to run a RegTest network, but I need the addresses to be in the format of the ainnet. Can I configure the RegTest to run with Mainnet ...
0
votes
0answers
27 views

Implement HD Walet Full Node

I have set up a full node on my server. Now, I want to make use of HD wallet methods? How I generate an address for admin - Master address How I generate addresses for customers - Child address ...
0
votes
1answer
35 views

Different balance for same private key using bcoin and copay

I´ve got a copay wallet for test purpose. In there I have used a wallet for quite a while. Now I´ve started to play around with bcoin and wanted to import the wallet from copay to bcoin. therefore I´...
0
votes
1answer
26 views

JSON with price AND daily change? [closed]

May be someone could point me towards a public API with Bitcoin price AND 24h change? Like $7'602 +2.3%? All APIs I've found (like coindesk's) only contain price, not change :(
0
votes
1answer
24 views

Can you help me tell if my new out-of-the-box ssd for a Pi4 myNode project is DOA?

Trying to setup a node on a Pi4 with ssd and blockchain appeared to be downloading well. My router said I was gobbling data for 2hrs. Then I received the "Looking for Drive" message. I rebooted once, ...
0
votes
1answer
24 views

bcoin.io: Get TXs in reverse order

I am using bcoin for a project. I would like to retrive TXs in reverse order. In the documentation I read that I can do that through the "reverse" query string parameter. Anyway, the ...
0
votes
1answer
99 views

Missing transaction in newly installed Bither wallet

On bitcoin.org I learned about the Bither wallet. I installed it, created an HD account, and replenished the wallet sending to the address 19QpMgv2N2hSJNq6Nrkg1rzJ1Fc9s2Pjbf. As can be seen, the ...
0
votes
2answers
24 views

How to verify signature in java using message and public key?

I was trying different things to verify the signature but couldn't succeed. I have got the following: message in string or decimal array (ASCII code for each char) public key in decimal array (which I ...
-1
votes
3answers
94 views

Vulnerability of Bitcoin Network

Hi all I was wondering if I am doin a wrong assumption here: Let's assume a dezentralized peer to peer network and the bitcoin protocol. If a full node changes a transaction within a block and then ...
1
vote
0answers
18 views

How to open channel with output of closing channel? [Lightning Network]

How can I automatically open a new channel while closing another, avoiding to create an unnecessary intermediate transaction? Do any wallets support it at the moment, or would I have to do it with a ...
5
votes
4answers
2k views

Do miners validate each other's blocks?

I understand that to mine a block, miners solve a cryptographic problem and the solution can be easily verified by other nodes on the network, appending the new block to their blockchain. But why do ...
3
votes
1answer
186 views

Who decides the block reward in Bitcoin?

I know that when a miner mines a block, he will be rewarded with some bitcoins. But who decides how much bitcoin he will get? If it is decided by all the miners (as they are the ones verifying ...
2
votes
4answers
156 views

If two parties submit a conflicting transaction between each other, how does the network decide which one is correct?

Let's say parties A and B both submit a transaction to the blockchain with a different version of what happened. Party A submits a transaction saying Party B gave him 3 BTC and Party B submits a ...
0
votes
2answers
46 views

Error -26: mandatory-script-verify-flag-failed (Signature must be zero for failed CHECK(MULTI)SIG operation)

I've created a raw transaction, and I get this error when I try to send it with sendrawtransaction to my local bitcoin regtest: { "error": { "code": -26, "message": "mandatory-...
0
votes
1answer
26 views

How can you create a transaction with multiple inputs from the Blockcypher API?

For example, I have two addresses and each of them has received 1 BTC. Now, I want to transfer 1.5 BTC to another address. How can I achieve this using the Blockcypher create transaction API?
1
vote
0answers
25 views

The purpose of USDT (and other stable coins)?

Any institution that trades cryptocurrencies is not classified as a financial institution by definition. Therefore, any exchange involved with cryptocurrencies only is not subject to financial ...
2
votes
1answer
65 views

How is a USD-chained currency like Tether economically possible?

(I'll try my best to keep it relevant to Bitcoin, but feel free to close it if it seems inapplicable to Bitcoin trading. It's more about economics) Say there's a currency whose supply is controlled (...
1
vote
2answers
54 views

Error 26: mandatory-script-verify-flag-failed (Data push larger than necessary)

I've created a raw transaction, and I get this error when I try to send it with sendrawtransaction to my local bitcoin regtest. { "error": { "code": -26, "message": "mandatory-...
1
vote
1answer
26 views

Why do I have to update my node version if I am up to date?

So a few months ago I unplugged my bitcoin node when it was running perfectly. So when I connected it again this week I had to let it sync to the blockchain again. Now you can see it's synced but I ...
0
votes
0answers
18 views

Raw transaction Error: mandatory-script-verify-flag-failed (Signature must be zero for failed CHECK(MULTI)SIG operation)

I'm trying to create and sign a raw transaction and broadcast it to the testnet. This is input transaction: { "error": null, "id": "1", "result": { "blockhash": "...
3
votes
1answer
67 views

what is meant by DEFAULT_ANCESTOR_LIMIT in child pay for parent?

Why is 25 the max parents a child can rescue in a child pay for parent? I don't think I understand what DEFAULT_ANCESTOR_LIMIT = 25 means. Does that also mean that the child transaction has 25 ...
3
votes
1answer
65 views

Sign manually P2SH-P2WPKH with openssl

I have a very similar problem of my last post before post again, I tried a lot of time but whitout success. I studied this link but I don't find solution. I have 50 bitcoins (total Amount) and I want ...
0
votes
1answer
35 views

Is there some way to take advantage of the fact that I own 10 BTC without spending them or giving up control of them?

Is there some kind of "Bitcoin society" where I can instruct my Bitcoin Core to run a command which then spits out some kind of cryptographic code which verifies that I control/own the number of BTC ...
0
votes
1answer
40 views

Bug in copying BTC address

I'm new here but I've been in the crypto world since 2016, today I'm going to tell you what just happened to me. I had to send 25 euros to the address: 3Lch25qM9kKNEydEKKCKc2Em1naHBLN44y After an hour ...
0
votes
0answers
14 views

Why do these 2 blocks have the same hash for the block reward? [duplicate]

Could someone explain to me that why do the hashes of the block rewards in these 2 blocks be the same? https://www.blockchain.com/btc/block/...
0
votes
1answer
36 views

Does secp256k1 library provide API for generating uncompressed key?

Hi I am right now want to do a make a small tool to generate some test vector for ecdsa. Openssl is quite good, for support secp256k1 bitcoin provides an excellent library. However, it looks what I ...
0
votes
2answers
32 views

Port 8333 closed, fwd on Router OK, firewall port open, full-node not reachable

I have set up my bitcoin/lnd full node and found out that port 8333 is closed. When checking using https://bitnodes.io it tells me it's down I've checked the router config and port 8333 is forwarded ...
1
vote
2answers
43 views

Question about transactions added to mempool

When bitcoin transactions are made, I know that they are put into the mempool. After certain transactions are added to a block and that block gets verified, what happens to all the other transactions ...
1
vote
1answer
14 views

What does volume mean?

When we talk about OHLCV bars for say LTC-BTC, what does volume mean ? Is it the quantity of LTC transacted during the bar or the quantity of BTC transacted during the bar?
0
votes
1answer
40 views

Should I use Electrum Wallet OR Bitcoin Core as my website's payment gateway?

I'm a developer who is building a website that need to process Bitcoin payment requests. So I need a payment gateway. In my last project, I used Electrum wallet as payment gateway but my last ...
1
vote
1answer
27 views

What is the difference between adjusted and reported volume for exchanges?

I'm trying to get an idea of exchange ranking in terms of trading activity (i.e. volume). I've had a look at www.coinmarketcap.com. There are 3 sortings which are rather different: Exchanges by ...
1
vote
1answer
35 views

Why does Binance use USDT instead of USD?

binance seems to have BTC-EUR but no BTC-USD. I can see BTC-USDT. Is this the closest one to trading BTC-US dollar?
0
votes
2answers
53 views

Convert Base64 Private Key to WIF

How do I get my private key from this? I found an old file on one of my hard drives with a wallet address and something that looks like this (changed for obvious reasons). What is this and how can I ...
4
votes
2answers
285 views

Is it possible to write a transaction of bitcoins, having only pen, paper and a private key from the address with some unspent outputs?

In my last answer I have done an allegation which I want to be proven or disproven. If this work possible, how much paper does it require? What kind of software needs Bob to send a transaction to ...
1
vote
1answer
27 views

How does exchanges, such as coinbase handle off-chain transaction?

Does coinbase create a channel between each customer and coinbase itself? If i buy 10 USD of bitcoin from coinbase, where does the 10 USD worth of bitcoin come from? Does coinbase maintain a huge ...
0
votes
1answer
29 views

How to import an existing extended private key to bcoin?

I´m searching for a way to import an existing extended private key, exported from electrum, into a bcoin node. Reading https://bcoin.io/api-docs/ I can´t find a description to do this. Am I missing ...
0
votes
1answer
42 views

Why am I receiving an email from Blockchain about receiving a payment?

I do not own bitcoin and do not belong to Blockchain but received an email from Blockchain about receiving payment... Incoming Payment You just received 3.86655869 BTC from an external Bitcoin ...
1
vote
3answers
32 views

Lightning network without main chain?

I've been reading about the working of LN. I had this interesting thought, what if we dont need the main blockchain and the miners to have a p2p cash system. Let me explain. The difference between ...
0
votes
0answers
30 views

What would a bitcoin quantum resistant address look like?

In an hypothetical future where a quantum computer is able to break the cryptography protecting the bitcoin private key, one of the solution would be to move our coins to quantum safe resistant ...
0
votes
0answers
17 views

Bitcon core wallet showing zero after synchronization

My father tried to sync his Bitcon Core wallet and he doesn`t know why synchronization lasted for shorter time than the wallet had estimated before. After synchronization the wallet showed crash and ...
4
votes
1answer
46 views

BIP34, BIP66 and BIP65 should have been enforced at unique block heights. Why do different sources claim different block heights for enforcement?

Inconsistent Consensus/Activation of BIPs BIP34 Activated Block Height 227,835 (BitMEX Reference) Activated Block Height 227,930 (Bitcoin Developer Reference) Activated Block Height 227,931 (...
0
votes
0answers
20 views

How does hard fork lead to a double spending attack?

I read some article mentioned that hard fork may lead to a double spending attack. I wonder how? And i have one more question: will the bitcoin wallet address change after the hard fork?
1
vote
1answer
23 views

Any side-effects of upgrading to HD wallet in relationship to hard forks

I have a very old wallet that I created about 7.5 years ago. I realize that I need to upgrade to a BIP32 (HD) wallet. I am up to date with the latest Bitcoin Core and have kept it relatively up-to-...
2
votes
1answer
197 views

Why did the core developers choose base64 for PSBT encoding?

Why does bitcoind use baase64 to encode PSBT's? Just out of curiosity.
2
votes
2answers
76 views

Who is the target audience?

I can not stop asking myself the question, what problem does bitcoin actually solve? Before you accuse me of being lazy and not doing any research, here is my thought process: You want to have a ...
0
votes
2answers
30 views

What were 'high-priority' transactions in Bitcoin Core v0.9?

I came across these release notes for Bitcoin Core 0.9 and saw this quote under 'Transaction Fees'. Does this distinction between 'high-priority' and 'highest-fee' transactions still exist? What ...
0
votes
1answer
30 views

bitcoincore banned all peers and I can't to sync

I started downloading the chain and got to 14% and it just stopped and still shows 7% per hour but not moves. I checked and it banned all the peers and everytime I unban them they just get banned ...

15 30 50 per page
1
5 6
7
8 9
486