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1answer
15 views

Imported bitcoin address to block-chain un-spendable

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 ...
0
votes
1answer
14 views

I want withdraw from BitPay and send USD to bank account in Puerto Rico. I reside in Argentina. Is that possible?

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 ...
0
votes
1answer
25 views

How to determine if BTC has been received from a particular address

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 ...
0
votes
2answers
55 views

Generate P2SH-P2WSH

I want to generate P2SH-P2WSH with script P2PKH. My public key is 027712968e8f2f9dfa79abe10940a3d915a0c95a0b97750881e6201acf2b66da97 SHA256 and RIPEMD160 of Public key ---------- Witness Script ...
1
vote
1answer
43 views

Bitcoinjs-lib how to add multiple utxos in addInput

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 ...
0
votes
1answer
10 views

Transaction Status: 0 / not confirmed, not in mempool

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
0
votes
1answer
20 views

Will bitcoind import private keys for multi-sig descriptor with watch-only flag set to true?

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']...
0
votes
0answers
11 views

Litcore-lib is not able to make txn from bech32 address

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 = [{ ...
0
votes
1answer
36 views

30 months of history, and 50GB of data?

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 ...
0
votes
2answers
53 views

Can I lose my Bitcoin.com wallet if the company and the website database are destroyed?

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....
0
votes
0answers
15 views

Blockcypher make_tx_signatures “Bad Signature” error

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, ...
2
votes
1answer
70 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 ...
0
votes
2answers
39 views

Creating a custom transactions

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 ...
0
votes
1answer
31 views

How to find Reused R values

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 ~ ...
0
votes
1answer
20 views

Why can't P2PKH's scriptPubKey be shortened to only OP_CHECKSIG?

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 ...
0
votes
0answers
27 views

How can i mine bitcoins to direct wallet using JavaScript?

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 ...
0
votes
0answers
36 views
+50

How to construct and redeem a bip199 htlc with python-bitcoinlib

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 ...
0
votes
1answer
24 views

Use case for multiple inputs in a single transaction

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 ...
0
votes
1answer
23 views

Can a 'free' Bitcoin 'marketing' ad be checked in any way

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 ...
0
votes
2answers
46 views

Why are hashes base16 (hex) encoded rather than base58 encoded?

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)
-1
votes
0answers
17 views

Regular expression for the bitcoin gold network [closed]

Maybe someone knows a regular expression in order to recognize the address of Bitcoin Gold?
0
votes
0answers
15 views

Create electrum wallet (+android) for altcoin with POS [closed]

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.
1
vote
1answer
19 views

Can't send raw transaction Bitcoin Core 0.19.1 - non-mandatory-script-verify-flag (Signature must be zero for failed CHECK(MULTI)SIG operation)

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(...
0
votes
2answers
44 views

Sent bitcoin but was never recevied

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 ...
0
votes
0answers
31 views

Most crypto exchanges have a similar API. What software (commercial or open-source) are they using in their back-end? [closed]

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 ...
1
vote
1answer
69 views

Generate P2WSH native

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 ...
0
votes
2answers
41 views

How do you type the ₿ Bitcoin Symbol in Android Google Keyboard?

Is there a way to enable the Bitcoin symbol on my Android 9 Google Keyboard? I dont see it anywhere.
0
votes
1answer
62 views

I lost my uncle few Weeks ago due to the covid 19 and I have his wallet

I have my uncle wallet and I don’t have his private key can anyone help
0
votes
0answers
8 views

prune error, cannot open my wallet

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 ...
0
votes
2answers
21 views

How can I execute `getnewaddress` at my full node from a remote server?

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 ...
0
votes
0answers
10 views

How could be useful the softforks field that provides the RPC command getblockchaininfo?

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 ...
0
votes
1answer
26 views

How do bitcoin nodes agree who first mined ablock?

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 ...
0
votes
0answers
8 views

Fail to sign the Segwit Transaction's input in bitcoinj

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 ...
0
votes
0answers
13 views

in HD wallet implimantation how can I generate public key in master node?

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. ...
0
votes
1answer
67 views

Old p2sh address not signing correctly on core v0.17

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 ...
0
votes
1answer
33 views

getting public key from any raw transaction - what to take care of?

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 ...
0
votes
0answers
9 views

antminer s9 controler board repair [closed]

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 ...
0
votes
0answers
19 views

Bitcoin stuck in bitcoin core

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 ...
1
vote
1answer
18 views

in PHP how to calculate full uncompressed public key from a short 02/03 pubkey?

in PHP how do i create the full public key from a compressed one? my test key is 026a04ab98d9e4774ad806e302dddeb63bea16b5cb5f223ee77478e861bb583eb3 and the uncompressed one is ...
0
votes
1answer
18 views

How a transaction is permanently accepted by the blockchain?

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 ...
1
vote
1answer
38 views

Can the forked be unforked? [closed]

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 ...
1
vote
0answers
24 views

How to sign a 2-of-2 multisig address?

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 ...
2
votes
1answer
25 views

Handling “dead” (double-spent) transactions in my mempool

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 ...
2
votes
1answer
31 views

Why do some wallets not need syncing?

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 ...
2
votes
1answer
27 views

Why does my BIP32 implementation throw different results than other web implementations? They also disagree with each other tho

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 ...
1
vote
1answer
36 views

How can you trust Bitcoin nodes?

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 ...
1
vote
0answers
31 views

Bitcoin Core wallet fails to load and requires reindex after I already did it

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 ...
0
votes
1answer
25 views

Perfect option scammed [closed]

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
1
vote
1answer
30 views

Is the contest period really necessary for cross-chain transactions in 2-way-peg sidechains?

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 ...
1
vote
1answer
33 views

Can I run 2 Bitcoin nodes with the same wallets?

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 ...

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