All Questions

0
votes
1answer
22 views

Can't link my Paper Wallet to Blockchain

So I've created a Paper wallet using bit address.org, and have joined Blockchain.com, but can't find out how to link the two? Also the strategy I'm using at the moment-till maybe "you" say otherwise, ...
0
votes
1answer
27 views

Is there a way to create 9995000 spendable BTC on regtest?

I'm doing to a large stress test on 1000 node network where each node sends transactions to one another at a specific rate, and I need a way to create the funds for running it, enough so that each ...
-1
votes
0answers
15 views

Violation of immutability while purging of private data from fabric ledger?

If private data has a lifespan, and it is purged after this lifespan. Doesn't this violate the fundamental principle of immutability and the core idea of the blockchain. I know that the hash of these ...
0
votes
1answer
26 views

json-rpc of bitcoin not working for testnet(curl command)

I am trying this command to get transaction from bitcoin testnet: curl --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "gettransaction", "params": ["txId"] }' -H 'content-type: text/...
2
votes
1answer
86 views

What hash algorithm is used in Bitcoin Cash?

I know that bitcoin uses hashcash as PoW algorithm, Ethereum uses EtHash and Litecoin uses Scrypt. But I didn't found anywhere the PoW algorithm used in BitCoin Cash, does it uses hashcash too?
1
vote
1answer
23 views

How do Bitpay invoices hide the Bitcoin address to pay to? I want to pay with another wallet.

Bitpay invoices are not compatible with most Bitcoin wallets out right now. I wanted to pay a bitpay invoice, but my wallet doesn't support it. How does Bitpay hide the bitcoin address on their ...
0
votes
1answer
40 views

Is there a maximum balance that a single address can hold?

Is there a maximum number of satoshis that a single address can control at a single time? I ask because when I generate regtest blocks to a single address, it's balance gets stuck at 1494999998350 ...
0
votes
1answer
21 views

Can't use bitcoin-cli commands, error message says “could not connect” from localhost

I am simply trying to run bitcoin-cli getinfo on the same machine that my bitcoin node is running on (with bitcoind -daemon) my bitcoin.conf file is as follows: server='1' rpcuser='username' ...
2
votes
1answer
40 views

Bitcoin ECDSA signature in the compact format

I would like to understand how to get Bitcoin ECDSA signature in a compact format, when it's exactly 65 bytes. In the bitcoin-core repository, secp256k1_ecdsa_recoverable_signature_load is ...
0
votes
1answer
20 views

Unable to get transaction with json-rpc command

I am trying this command to get transaction from bitvoin testnet: curl --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "gettransaction", "params": ["txId"] }' -H 'content-type: text/...
1
vote
1answer
14 views

What really happen when user moves fund between Main Account and Trading Account in HitBTC?

I am building a crypto exchange and I wonder how HitBTC exchange (https://hitbtc.com/) is handling "Main account" and "Trading account", as the image below: According to them, Main Account is like ...
1
vote
1answer
18 views

With the Bittrex BTC-BCH pair how do I order enough BCH to exactly spend one BTC?

Bittrex orders have their lot size/quantity in BCH and price in BTC. If I only have one BTC in my wallet how can I convert it all to BCH? To ask another way: How do I know the exact quantity of BCH ...
1
vote
0answers
28 views

Why can’t lightning tx’s be signed with sighash single to allow for fee updates?

Are out-of-band fee payments to confirm a lightning closing transaction the only way to manage a situation where the sat/kw of a previously signed commitment tx are simply below market? If additional ...
1
vote
1answer
21 views

On Coinbase Pro does anybody know what criteria are used to decide if a limit order should be rejected due to insufficient funds?

I'm playing around with their sandbox api and trying to figure out when a buy order will be rejected due to insufficient funds. It seems that market orders will be rejected only if you give the order ...
2
votes
1answer
18 views

Ardor: How to decide if an asset can be send?

My (Javascript) frontend needs to decide whether the user can send an Ardor/Ignis asset in his account. My code checked for: quantityQNT >= amount_to_send But I realise that this doesn't work if ...
1
vote
2answers
21 views

Why are most Bitcoin payment invoices time limited ?

Most bitcoin payment gateways issue time-limited payment invoices. Why is that ? AFAIK, the address stays valid even after the timer is out. For instance when sending a transaction from wallet to ...
4
votes
1answer
42 views

How to attach an encrypted message to a payment transaction inside a contract?

How can I attach an encrypted message to a payment transaction from inside a contract? In release 2.2.0e it was possible by just calling the SendMoneyCall API with .messageToEncrypt: SendMoneyCall ...
0
votes
1answer
26 views

Blockchain endpoint working

I wanna clear this thing that how blocks are retrieved and created in from the nodes using an end point. The end point is basically centralized and have nothing to do with network if i'm not wrong. Is ...
2
votes
1answer
41 views

Confusion about `unloadwallet`

It's not clear to me how unloaded wallets behave in Bitcoin Core v0.17.0.1. If I create a new wallet with createwallet, add a receiving address to it using importmulti, then unload it using ...
0
votes
1answer
19 views

How does Bittrex charge its commission? [closed]

Assume I want to trade the BTC-BCH pair. I have only one BTC in my exchange wallet and want to buy one BTC worth of BCH. What currency will the 0.25% commission come out of? Will I need to trade 1 ...
1
vote
1answer
26 views

Monitor bitcoin transaction confirmation timestamps

Well, i'm planning on developing a graph that shows bitcoin transaction average confirmation time per hour , but i have no clue where i can get transaction confirmation timestamps. I'm running ...
0
votes
0answers
20 views

What's the exact formula where I can calculate my liquidation price on Bitfinex for a leveraged position?

The following variables are given: Exchange: Bitfinex Funds: $10,000 USD BTC Price: $1000 Use Leverage of: 2x = $20,000 USD Say I wanted to go long Bitcoin thinking it would be above $1000 in the ...
0
votes
1answer
59 views

I accidentally transferred my Bitcoin Cash to Bitcoin (BTC) wallet in BitMEX! [closed]

A few days ago, I bought Bitcoin Cash and transferred it to my BitMEX Bitcoin BTC Wallet by accident! This is money that I can't afford to lose! What do you suggest I do? My conversations with BitMEX:...
1
vote
2answers
47 views

Is there any mechanism in Bitcoin that allows it to dynamically adapt to the flow of transactions?

I've read some books and articles on Bitcoin and feel like I've understood many of its concepts but I'm not able to find an answer to a question I've had for a long time: How does the Bitcoin network ...
0
votes
1answer
26 views

Is P2SH-wrapped P2PKH possible?

There is a known form of address that called P2SH-wrapped P2PKH, wrapping SegWit address as Base58 (P2SH) address. Thinking about such address type, I come up with the question: Is P2SH-wrapped P2PKH ...
0
votes
1answer
41 views

How to import p2wsh-in-p2sh multisig as watch-only?

I've created a p2wsh-in-p2sh multisig address using an offline node. I have the address and redeem script, as provided by bitcoin-cli addmultisigaddress on the offline node. How do I import this as a ...
0
votes
1answer
26 views

Sent BTC to Jaxx Wallet Never Received [closed]

A friend suggested I use Jaxx Wallet so I downloaded the software and sent my BTC using their QR Code from Coinbase. Looking back, I should've left it where it was! It never arrived. I also sent LTC ...
0
votes
0answers
3 views

What rules does the Exodus Wallet follow in selecting outputs to cover the amount being sent?

If you use CTRL-Shift-D to open the Developer Menu in the Exodus wallet, you can go under Developer|Assets and select your crypto and then choose the "Export Address" function. This saves a csv file ...
-1
votes
0answers
14 views

How to calculate profit for merged mining coins

I am making a mining profitability calculator for these coins that use merged mining: BlakeCoin However I dont know on how I would actually calculate the profitability for that. I made a calculator ...
1
vote
1answer
75 views

What are the issues of running lightning daemon with pruning node?

Most lightning implementations I came across don't officially support pruned full node. Why is pruned mode implementation a challenge? What risk am I taking when I run lnd with pruned bitcoind?
1
vote
0answers
38 views

Determining the byte size of multisig transaction beforehand knowing the details of the transaction [duplicate]

If I know the m of n values of the multisig, the # of inputs (all of which are from the multisig and require m signatures) and outputs and the redeem script, how can I determine the size of the ...
0
votes
1answer
37 views

Spendable Wallet

My friend ask me to open a wallet in blockchain and ask me to give the ID and password later he transact certain amount of btc which shows non spendable after which I am asked to change my password ...
-1
votes
0answers
15 views

I want to send/receive payments via python, what are my thin client options

I have a need for the following: 1) ability to create wallets 2) send/receive payments 3) check wallet balances 4) can work in mainnet and testnet Since my blockchain goals are minimal, I would ...
-1
votes
0answers
10 views

How can I verify child keys derivated from Xpub key

I'm using BitcoinJ library in order to implement BIP32 HD wallets. Right now I've successfully derivated child pubkeys from a extended public key. But these childs are isPubKeyOnly=true how can I ...
1
vote
1answer
23 views

How do non-deterministic wallets violate the principle of address reuse?

In chapter 5 of Mastering Bitcoin, Andreas writes: "The disadvantage of random keys is that if you generate many of them you must keep copies of all of them, meaning that the wallet must be backed up ...
-1
votes
0answers
15 views

How to get change address list in bitcoinj?

I'm using bitcoinj for transactions. Now I want all change address list. How can I do that? Please help me who knows.
0
votes
1answer
19 views

How to connect to a public node through json RPC?

I found a list of public bitcoin nodes here. I am using a php library. How can I connect to these nodes via JSON RPC? Is it safe to connect to public nodes? What should I give as username and ...
0
votes
1answer
15 views

What does PreviousTxnID refer to in Ripple API?

What does the field PreviousTxnID refer to? Does it refer to the most recent transaction? Not sure what it specifically means. Help would be appreciated.
-1
votes
0answers
25 views

I mistakenly sent bitcoin cash to a bitcoin address, is it possible to retrieve it? [duplicate]

{The link below is the direct link to the Blockchair page that shows my BTC sitting there, unspent} (https://blockchair.com/bitcoin-cash/address/qqvezfcl2ttjjycgrm68klfy2myzmgcpdyaylklhpt) I’ve been ...
0
votes
1answer
20 views

Old Bit Coin Wallet Failing to Pass 180 Weeks

I have an old laptop that I have bitcoin wallet on. I left the computer alone since early 2015 and when I try to sync the bitcoin wallet, the wallet gets stuck on 180 weeks. the bitcoin wallet sync ...
0
votes
2answers
27 views

Watch a BitCoin account for incoming payments

I want to watch a set of BitCoin addresses and be notified (preferably by email) when they receive a payment. I prefer me not to write my own software for this and not to install it on my own server, ...
0
votes
1answer
22 views

Does bitcoin validate transactions against the mempool?

I want to know whether or not bitcoin checks for the existence of transactions in the mempool as one of the many validation rules it performs for new blocks. If a transaction most exist in the ...
4
votes
1answer
58 views

Expected use model for PSBT

I want to use Bitcoin Core to create a PSBT for offline signing (cold storage) of a multisig p2wsh-in-p2sh address, such as that created by Glacier. Based on the PSBT doc I assume I want the online ...
-1
votes
0answers
17 views

Why use HMAC-SHA512 in BIP32? [duplicate]

Why do we use this specifically over anything else (say just SHA512)? Curious as to why this was. Thanks.
3
votes
1answer
50 views

How to use Interfaces inside a contract?

How can I create and use Interfaces inside a contract? For example when I have the following contract: package com.jelurida.ardor.contracts; import nxt.addons.AbstractContract; import nxt.addons.JO;...
-1
votes
0answers
19 views

Bitcoin spendable amount minus unconfirmed transaction

I have a use case here where I want to display spendable bitcoin amount (that minus unconfirmed transaction). Is there any existing api or library that cater for that? Let say wallet A has 10 btc. ...
-1
votes
0answers
13 views

bitcoin-transaction npm showing Bad Request in response

I am using bitcoin-transaction node npm package for transfer satoshi from one address to another on testnet. I have 0.67779124 satoshi in my testnet address. and I want to transfer it to another ...
0
votes
1answer
35 views

Is transaction validation in Ripple trust-based or trust-less?

In Ripple consensus, (1) Each validating server maintains a list of trusted servers known as Unique Node List (UNL). (2) Servers only trust the votes issued by other servers which are contained in ...
4
votes
3answers
146 views

Sending transactions to mining nodes only?

Instead of propagating transactions across all nodes in the bitcoin network, would it be theoretically better to just send transactions to mining nodes as transactions are only confirmed and 'used' ...
4
votes
3answers
95 views

What was the first altcoin?

I'm aware that LiteCoin is (was?) the "silver" to bitcoin's "gold". The question is: What was the first altcoin? Was it actually LiteCoin or was there something else? For the purposes of "alt ...

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