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9 views

BCH to BTC by accident [duplicate]

I sent BCH to a place that only accepts BTC by accident. If they don’t take it why didn’t it come back to my account. It’s not in my account. Uh they say they don’t have it and I have a transaction ...
1
vote
1answer
16 views

Lightning - why are commitment transactions supposed to use different keys

In the paper BIP32 and deterministic key derivation is mentioned. But why given that two peers directly exchange messages (i.e., there is no need to obscure anything)? Alice always exchanges state ...
3
votes
3answers
67 views

Why Coinjoin need other participants to increase their privacy?

Coinjoin is a method that make a transaction with other transaction of other parties to hide the link between txin and txout. In case of this, why we need others transaction? We have many bitcoin ...
0
votes
1answer
33 views

Calculating the cost to send bitcoin?

This is a follow-up post to this question. I am using Electrum to send Bitcoin. From what I can gather, it doesn't seem like there is a way to know your "inputs" upfront. The inputs are the various ...
-1
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0answers
16 views

24/7 BTC price monitor on Android devices

Is there any existing app that has widget flashes on the main screen or when the phone is in idle like TIME update
1
vote
1answer
25 views

Blockchain 51% attack

If in 51% attack , transactions can be reversed, isn't it possible that the network with more hash rate , change the transactions (for example if x sent 5 bitcoins to y , they will change it to x sent ...
0
votes
1answer
22 views

Mini-seed of single utxo

Let's imagine we have a cold storage wallet that has multiple utxos inside of it and we have a master seed for this wallet. If we want to spend from coldstorage but want to go first through a new ...
0
votes
1answer
26 views

How can I print these information using this library?

I want to know how through using this library I can print information about the current block that the world mine right now and I mean by that: Version, Previous Block, Merkle Root, Time, Bits, and ...
2
votes
1answer
38 views

Is the ordering of blocks in the rev*.dat files same as the blk*.dat files?

I understand that blk*.dat files save the blocks in the order it gets them from it's peers. Is the rev*.dat files in the same order as the blk*.dat files? For example, would the 400th magicbyte in ...
-2
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0answers
26 views

How much would being a millionaire (in BTC) cost? [closed]

You know how people talk about how they want to have a million dollars? Well, I have a far more...golden question. How much would it cost to get a million bitcoins? This number (unless you have all ...
0
votes
1answer
10 views

How to obtain your nodeID (QR code) in eclair-mobile?

I want someone to open a direct (no hops between us) channel to me in lightning (she will be the funder, I'll be the fundee). How can I get the QR code of my node in my eclair wallet to show to the ...
2
votes
1answer
32 views

PBFT algorithm - how do we know how many nodes are faulty?

I am reading this article about PBFT and I have trouble understanding how it can be used in practice. If we don't how many nodes are faulty (which I believe is a valid assumption), then how can we ...
0
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0answers
19 views

How to implement 2/2 multi-signature transactions with bitcoinj

I am using bitcoinj to implement a 2/2 multi-signature transaction. Now I want to use bitcoinj to generate a 2/2 multi-signature address and its corresponding Redeem Script through the public keys of ...
0
votes
1answer
17 views

Bitcoin deposit and withdraw rate same or not [closed]

Hello I hope u reply my message... Bitcoin deposit and withdraw rate same or not...and can I deposit with local bank and withdraw in Bitcoin after profit..how much time to withdraw process
1
vote
1answer
15 views

Wallet.dat in the mobile hard disk is not backed up after sending Bitcoin

Wallet.dat in the mobile hard disk is not backed up after sending Bitcoin, what can i do if the data recovery cannot found it? I have the original wallet.dat and private key, but there are no coins in ...
0
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0answers
28 views

What are the other digital currency like Bitcoin? [closed]

Hello Friends can anyone tell me how to update digital currency rates if anyone one has knowledge kindly help me
0
votes
1answer
26 views

How to find address that holds the balance in Bitcoin Core?

I am unable to find the address that holds my balance in Bitcoin Core. All receiving addresses has a balance of 0. But there is a balance in the wallet. How do I find the address that holds that ...
0
votes
1answer
24 views

I sent a bitcoin to a non coinbase email address [closed]

How do I retrieve a bitcoin sent to an email address from coinbase and the email address is not registered with coinbase...
0
votes
0answers
10 views

Electrum history working locally, but not on server?

If I type this locally: electrum server Then I see the correct details: { "summary": { "end_balance": "0.009", "end_date": null, "from_height": null, "incoming": "0.009", "outgoing":...
0
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0answers
10 views

Intermittent error “min relay fee not met” even with decent fee and custom Electrumx+Bitcoind

I have an automated system that sends BTC payments via Electrum for a client. Now, it happens again and again that payments keep failing with "min relay fee not met" (RPC call failed: {"code":-32603,"...
1
vote
1answer
10 views

How to access Electrum remotely via the rest api?

I am able to execute calls on the server from the server. When I say calls, I mean like this. I.e. I can get the latest addresses doing something like this: $ch = curl_init(); curl_setopt($ch, ...
1
vote
1answer
23 views

How to implement getrawmempool?

I’m trying to get all transaction ids in the memory pool as json array. I just finish downloading bitcoin core and do now know where to begin. Any help would be appreciated!!
0
votes
1answer
28 views

Withdrawal process

My broker asked Me to pay verification fee which is $670 and provide my ID I wanna ask is it legit to do that ? I invested 350 and earned $12000k
1
vote
2answers
39 views

Can someone explain how an HTLC is redeemed?

I'm looking at Bolt 3 in the Lightning rfc. My question is about how a HTLC is redeemed. Example HTLC script for reference: # To remote node with revocation key OP_DUP OP_HASH160 <RIPEMD160(SHA256(...
0
votes
0answers
23 views

Payment gateway from credit cards to Bitcoin [closed]

How can a web site accept payments via credit cards (or at least PayPal) and deposit Bitcoin (or other cyptocurrency) into a wallet? Essentially, I'm looking for the other direction of this question ...
0
votes
0answers
19 views

How can one make the price move using bitmex? [closed]

I have some coins, and I would like to try to make the bitcoin price move up. However, I'm not sure how one would do this, so I'm just asking for how it could be done for fun.
0
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0answers
31 views

How to predict the price of bitcoin? [closed]

I would like to be able to predict the price of bitcoin using a simple python program (or C program that can be compiled easily) because I want to see into the future. I know that this by definition ...
1
vote
1answer
32 views

Eltoo channel - can opening be off-chain

In Eltoo the set-up phase is similar to Lightning. You fund a n-of-n multisig (usually 2-of-2). Of course you don't want to publish this until you have a bail-out possibility - called "settlement ...
0
votes
2answers
27 views

Why same output address is invalid in a transaction on Bitcoin Core?

I'm studying Bitcoin Core currently. I found incomprehensible code, that shows making a transaction is rejected if there are same output addresses in a transaction. See Fig1, Fig2 Origin source code ...
2
votes
1answer
44 views

What is the rationale for the Lightning network's path length limit (20 hops)?

A sender in the Lightning network can choose a path with up to 20 intermediaries (BOLT4). Tor is another network that uses onion routing for anonymity. However, in Tor all paths have 3 intermediaries,...
0
votes
0answers
24 views

Haven't received funds [closed]

I haven't received my funds as from the address wallet provided was not correct what can I do to get my funds
1
vote
1answer
18 views

why bip 34 uses two step on MASF(Miner Activated Soft Fork)?

in bip 34, which change to bitcoin version 1 -> 2, uses two step for network's consensus. step 1. check if 750 of the last 1000 blocks are version 2 or greater. step 2. check if 950 of the ...
-3
votes
0answers
31 views

Help to decrypt this notification [closed]

I am really fresh here and I got such notification AppCoin - Closed by 415 (+6%) New entry BUY: 395 Sat. (+-10) 1. Sell 420 Sat. (+6%) 2. Sell 427 Sat. (+8%) 3. Pamp 435 Sat. (+10%) 🏴 1. Stop - ...
-2
votes
0answers
24 views

How much times i can receice 10$ registration bonus on coinbase [closed]

At first of all i created one account on coinbase to profite the new promotion of coinbase. But my question is: I would like to know how much time i can use the 10 dollars free in coinbase whrn i ...
0
votes
0answers
61 views

How to communicate with Bitcoin core 0.17 using bitcoinj for hd wallet creation?

Hi am building one hobby project and i want to perform some operations in my own bitcoin core 0.17 by using bitcoinj lib. so is there any way by which we can use bitcoin-core 0.17,bitcoinj for hd ...
0
votes
1answer
19 views

How to verify locking and unlocking scripts?

I've selected an arbitrary transaction id and retrieved its associated transaction details using the blockcypher explorer as follows: from blockcypher import get_transaction_details ...
0
votes
3answers
41 views

Private key generation method

How was bitcoin private/public key created in 2009, I observed in the blockchain some bitcoin transaction took place early 2009 Feb - April. In the original bitcoin core in github the first bitcoin ...
19
votes
2answers
11k views

Bitcoin sent, recipient claiming not received

I sent bitcoins to the address I was given (double checked). The recipient is claiming they did not receive it. I sent them a different payment yesterday at 8:30p and they didn't get it until 4:00am ...
1
vote
1answer
25 views

What is the max allowed depth for bip32 derivation paths?

Generally I see that bip32 derivation paths are something like m/1/2/3/4, etc How deep is allowed? Is there a limit on how deep the tree can go?
0
votes
0answers
25 views

Issue generating private Key and segwit address with python

I used the following script to generate my private key and the corresponding segwit address. Then to test it, i sent funds to the address and imported the private key on blockchain wallet; RESULT: ...
1
vote
0answers
16 views

RPCConvertValues() call error

I'd like to call RPC programmatically, instead of using bitcoin-cli. when I call the function RPCConvertValues(), it always raise error RPCConvertValues() is defined here : https://github.com/...
11
votes
4answers
3k views

What can blockchain do that normal databases systems won't?

Aside from cryptocurrencies, what advantages may blockchain(either public or private) have and real life use cases that can be more useful implemented in blockchain over traditional databases based ...
0
votes
0answers
12 views

Is it possible to generate a BitMessage-Vanity address?

I want to generate a vanity BitMessage address to receive and send message from. I this is possible for Bitcoin itself, but what about BitMessage?
0
votes
1answer
16 views

How does a constant opcode become negative in Script

I am doing some tutorial and in this chapter we are suppose to reproduce the Script scripting language I am struggling to understand one of the exercises, here it is: Create a ScriptSig that can ...
-1
votes
0answers
19 views

How to verify an BlockChiain transaction using python?

Find all details from the link: https://www.blockchain.com/btc/tx/94ec7186e39fd9a2fda11d67fde158ba956dea421b23bb3cdefb2cc008ad1440
1
vote
1answer
20 views

Is a script spendable if multiple items are left on the stack?

Is a script spendable if the top item left on the stack evaluates to "TRUE", and that is the only item left in the stack? In other words, is it okay for multiple items to be left on the stack? For ...
0
votes
1answer
81 views

How to deal with a shady exchange?

I'm new here and the reason is that I believe I became a victim of a scam. And hopefully, you may guide me to get out of this shitty situation or at least help me expose the scammers. I've been ...
0
votes
0answers
11 views

Electrum I can not make Legacy Address [closed]

I created to Electrum wallet and I set it up as a Legacy address with 2FA... because I want to claim a airdrop for HEX Coin on Dec 2 2019 that needs to have a legacy address that starts with a... 1 ...
0
votes
0answers
11 views

Is the Blockchain.com online wallet listed on Bitcoin.org website?

I can not found the Blockchain.com online web wallet on the Bitcoin.org website, e.g. following this: https://bitcoin.org/en/choose-your-wallet?step=5&platform=web&user=experienced
0
votes
1answer
33 views

Understand double spending through an example

Let’s suppose you have 1 BTC which you try to spend twice. You made the 1 BTC transaction to a merchant (Transaction T1). Now, you again sign and send the same 1 BTC on another Bitcoin address to try ...

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