All Questions

I imported a bitcoin address to my block-chain wallet. The bitcoin shows as un-spendable in the wallet. The address was used previously by me and worked fine. How do i fix the problem to make the ...

I want to withdraw/sell bitcoins that I have on my BitPay wallet. I need to transfer the results USD to account in Puerto Rico. I reside in Argentina. I have already tried with Skirll, but does not ...

I have been wondering if there is an api available that can enable me know if a certain amount of Bitcoin has been received from a particular wallet address. For the moment I have only be ...

I want to generate P2SH-P2WSH with script P2PKH. My public key is 027712968e8f2f9dfa79abe10940a3d915a0c95a0b97750881e6201acf2b66da97 SHA256 and RIPEMD160 of Public key ---------- Witness Script ...

Hi i want to make transactions of bitcoin bech32 addresses using bitcoinjs-lib , here is my code below, it works fine when my address has only one utxos but when it increases to two or more as its ...

Trying to send BTC, but fail. The transaction is not in mempool. What to do with these and how to solve the problem? I already returned BTC canceled the transaction

I am importing a "warm" multi-sig quorum into bitcoind using importmulti like so: {"jsonrpc":"1.0","id":"curltest","method":"importmulti","params":[[{ "desc": "sh(multi(2,[eb2d2f9e/44'/1'/0']...

I'm Unable to make a transaction with litecore lib using bech32 address, although same code for bitcore-lib is working and txn is signing. const litecore = require('litecore-lib'); let utxo = [{ ...

I had installed bitcoin-wallet app on an old phone a couple of years ago, just out of curiosity about bitcoin. I obtained somehow a teeny amount of bitcoin, .0017xxxx anyway, I installed the app on a ...

I am planning to convert a part of my fiat currencies into BTC. I see that web wallet are a good balance between ease of use and security as it prevents breaking a device, being robbed physically, etc....

I am having trouble to sign a transaction on Blockcypher Test Network (using python): import requests from blockcypher ( import send_faucet_coins, create_unsigned_tx, make_tx_signatures, ...

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 ...

I am currently learning how to create raw transactions. I can already create standard using bitcoin core (0.19.1), but when I wanted to create with custom opcode like this: asm: OP_HASH160 ...

I use software from https://github.com/ca333/rng-scanner , I try to find r that is reused. from the software I found results Bitcoin Address : 1GQdrgqAbkeEPUef1UpiTc4X1mUHMcyuGW In Input NR : 141 ~ ...

For P2PKH, the scripPubKey is OP_DUP OP_HASH160 <pubKeyHash> OP_EQUALVERIFY OP_CHECKSIG. Why can't it check the signature only? Why can't it be shortened to just one opcode — OP_CHECKSIG? Why ...

I heard that we can mine bitcoins using javascript direct to the wallet? How can I create Program, script or application which direct mines to the wallet & I even search online but did not get ...

Playing with this script, I'd like to understand how to construct a bip199 htlc and redeem it, however this script fails on the OP_EQUALVERIFY and I can't seem to understand why. I'd like an ...

Is there a way to ascertain a pair or more of Bitcoin addresses belong to the same wallet on the basis an address pair was used as input for a single transaction? Can I verify the address pair input ...

Total Bitcoin newbie here. I have no bitc, nor a wallet, nor am I sure I want one. I've been intrigued for a while, but security is a big passion of mine... Today just now youtube pointed me to an ...

BTC sha256 hashes are hex encoded (as sha256 spits out bytes not a string), why is this? Surely using base58 would be more efficient as would use less space (would output a shorter string)

Maybe someone knows a regular expression in order to recognize the address of Bitcoin Gold?

I want to compile the electrum source for my POS altcoin for windows and android. Is there any tutorial I can use to get started? Thank you for help.

I wanted to send a raw testnet transaction and I was doing it like in the bitcoin documentation, but I still get this error: non-mandatory-script-verify-flag (Signature must be zero for failed CHECK(...

After withdrawing bitcoin from a site I use I sent it straight to another site with a generated address, on my site it said it was completed but was never received on the other site. The three ...

If I want to launch a crypto exchange today, which companies do I look for that can provide me with an out-of-the-box software infrastructure when I don't want to build one in-house? I'm talking ...

I want to create P2WSH native like https://en.bitcoin.it/wiki/BIP_0173. I have already a script to generate P2WPKH and it works, thank the python part and re-arrange group byte works. I read that ...

Is there a way to enable the Bitcoin symbol on my Android 9 Google Keyboard? I dont see it anywhere.

I have my uncle wallet and I don’t have his private key can anyone help

if i want to open my wallet, i get a prune error: I have done: 1. start bitcoin-qt with the option -reindex , result is the same 2. download the blockchain completly, result is the same I cannot open ...

I have a full node running on a digital ocean droplet. I have an app running at heroku, and I want to execute getnewaddress from this app. I'm trying to generate BTC addresses to which users can send ...

When I execute the command getblockchaininfo I see useful information but I don't understand how to be useful the information that is displayed through field softforks, the example below: bitcoin-cli ...

Once transactions are broadcast and a node starts working on a proof of work, and finds it, it broadcasts it to all other nodes for that block to be verified and added onto their blockchain. All nodes ...

I want to spend from a segwit address and it has a P2WPH script, I created this transaction just like creating a normal P2PKH transaction, but just changed the address of the input to the segwit ...

As I know, in HD wallets, we have a seed that called "master seed" with 256bit length. When we want to generate the master node, we use a Hmac-sha512 with this seed as text and "bitcoin seed" as key. ...

https://pastebin.com/kdQPkELN if anyone can see why i am getting a 16: mandatory-script-verify-flag-failed (Signature must be zero for failed CHECK(MULTI)SIG operation)failure.... It is a p2sh ...

i need to retrieve public key of transaction sender. now i know there are 03 compressed pubkeys and 04 uncompressed ones. but how is this working with segwit and multisig addresses? can you please ...

Antminer S9 not showing kernel page and cannot access settings to change pool details. upgraded firmware via Bitmain. Flashed controller board using SD Card and miner started but could not save new ...

Anaware of the fact that Bitcoin Core has to sync 800gb of data before showing up my coins, I transferred some money on a wallet created with the application. Now my money is stuck. The files are too ...

in PHP how do i create the full public key from a compressed one? my test key is 026a04ab98d9e4774ad806e302dddeb63bea16b5cb5f223ee77478e861bb583eb3 and the uncompressed one is ...

If a miner A creates a block containing a transaction A and a miner B creates a block NOT containing the transaction A about at the same time, then some of the other miners will first receive the ...

So: BTC, BCH, BTG and BSV all trade at different prices/values. All have forked off from BTC and have different development teams, theories, practices, technology, etc. I noticed that when you look ...

I want to implement 2-of-2 multisig in bitcoinj, and I implement the methods which are used to sign the first time and the second time. But there is a bug that using the same key for the first signing ...

Say I receive transaction A and it is in my node's mempool and unconfirmed. Then a block gets mined directly, which spends one of transaction A's inputs, rendering transaction A invalid. What can I ...

I recently downloaded the Bitcoin Core wallet, and was mildly inconvenienced by the fact that I had to spend 4 days downloading 200 GB, but I just beared with it. However, I soon discovered that ...

I am implementing bip32 for my wallet as a project to learn Bitcoin. I am following this documentation: https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki Since I am not implementing ...

If you send send a transaction request to a node, what is to to ensure that node doesn't simply log your private key and do nothing? What is to stop the entry node from taking a transaction intended ...

My Bitcoin Core is synchronized. But I can't open a wallet, it says that I might need a reindex. Though I already did it. Also I can't do dumpprivkey because it says that no wallet is loaded. How can ...

I have been scammed from the platform Perfect Option. Does anyone else have any dealings with them? I am interested to find out further information

According to the first sidechain article (Link), the cross chain transaction process can be briefly describe as follows: Alice has a wallet on sidechain S1. She wants to send some coins to sidechain ...

We have a full Bitcoin node with its wallets on the server. The issue is that the majority of our wallets were synchronized long time ago. For us, it would seem that this synchronization task can take ...