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4 views

Transaction malleability

I have been reading about transaction malleability a lot still doesn't make sense to me. Is there a script I can use to test it out ? If the transaction that is malleable is changed by the attack, how ...
0
votes
1answer
15 views

Save state to the disk at abrupt bitcoind shutdowns

I have a bitcoind running, and after new blocks being synced, sometimes I kill it(without stop command). Next time, when I start it, it goes through already synced blocks. Is there any way to force ...
0
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1answer
9 views

using rpccookiefile instead of username and password for antminers

I mine using username and password at the moment but as bitcoin core is changing over to rpccookiefile. My question is, if i use rpccookiefile how do i point my antminers to my local bitcoind 'pool' ...
0
votes
1answer
24 views

Cheap way to attack the bitcoin block chain

Just for educational purpose but might come in handy sometime, what is the cheapest way to attack the bitcoin block chain? is it possible for a block with at least one confirmation to be orphaned ...
0
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0answers
7 views

BNB - transaction hash derivation

I'd like to derive a tx hash, but i can not find documentation about it given a transaction, lets say block 28973905 (which has one transaction) https://seed1.longevito.io/block?height=28973905 How do ...
0
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0answers
12 views

Bitcoin Core Question, Initialization Vector

I am reviewing Bitcoin Core source code. I am following the code which states take a double sha 256 of the public key to get the IV and use the master key for the encryption key for encrypted wallet....
0
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4answers
33 views

A question about full nodes, lightweight nodes and merkle trees

What is the purpose of full nodes storing merkle roots? Why don't they save the transactions only? The hashes could be calculated only when a lightnode asks for them and the merkle roots could be ...
0
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0answers
19 views

What is the complete process and purpose of a block validation using merkle trees?

I need the whole details please. Like does that happen only in the current block? Or at past blocks do? And how exactly does this happen? Do full nodes send the proper hashes and then a local ...
0
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1answer
12 views

Question about Merkle trees and blocks

There is something I cannot understand about Merkle trees. I understand how they are calculated and etc., but I cannot understand how they are used on a blockchain. If a block stores only the Merkle ...
-2
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0answers
12 views

Which of the following bitcoin scripts will generate a TRUE outcome?

i) scriptSig: <sig> scriptPubKey: <pubKey> OP_DUP OP_HASH256 <pubKeyHash> OP_EQUAL OP_VERIFY OP_CHECKSIG ii) scriptSig: <pubKey> scriptPubKey:...
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0answers
6 views

Got problems with margin's bots [on hold]

I'v downloaded cryptocurrency trade terminal&bots "margin"(https://marginsoft.host) and faced the automatic trading bots set up problems. FAQ did not help. Margin works correctly, all features ...
0
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1answer
12 views

bitcoin core problem payment

I downloading bitcoin core on my computer. But my computer is full, and downloading is not complete. I made transfer my bitcoin to URI on bitcoin core, which downloading. But nothing came and I didn't ...
0
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0answers
11 views

difference between extended public-key(xPub) and public-key

I wanted to know the differences between the public key and extended public key and their use cases.
0
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0answers
38 views

Checking my bitcoin wallet after two years I find that my bitcoin (0.5 bitcoin) is gone [duplicate]

After checking my bitcoin account after two years, 0.00010757 of a bitcoin remains even though I explicitly remember having half a bitcoin left. My first thought someone somehow stole it. But after ...
0
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1answer
37 views

My husband died, I have lots of codes and words… help

I will not post any of the codes here so please don't ask. So, my husband has a number of apps in a folder - Tronwallet Telegram Guildchat Coinbase Biance Google authenticator He kept going on ...
0
votes
1answer
10 views

How do I install a second independent C-lightning node on the same machine as one with an already operational node?

I have followed the steps to install a C-lightning node on my Ubuntu machine. I wanted to know if I could install configure and make a second node on the same machine where both could run in tandem?
0
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0answers
6 views

How to decode Rootstock (RSK) input data to a transaction?

Consider this transaction: 0x528c4eef2f0dbcd95c5928cb573552b263bc13f26da2f8ef258a51ee6e755cdf result": { "hash": "0x528c4eef2f0dbcd95c5928cb573552b263bc13f26da2f8ef258a51ee6e755cdf", "nonce": "...
0
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0answers
11 views

Using scantxouset method on bitcoind JSON RPC

BitcoinRPC class from here (ruby): https://en.bitcoin.it/wiki/API_reference_(JSON-RPC) btc = BitcoinRPC.new("http://rpcuser:rpcpassword@127.0.0.1:18332") btc.getaddress => "...
1
vote
1answer
25 views

Is the “recovery phrase” generated by a wallet app platform independent?

I recently started a wallet with Coinbase Wallet, and I was asked to backup a 12 word "recovery phrase" that is supposed to be able to recover my wallet in the event that I delete the app from my ...
1
vote
1answer
16 views

Setting up and running multiple C-lightning nodes on same machine

I have successfully setup a C-lightning node on ubuntu using the tutorial. The problem I am having is trying to setup a second node that DOESN'T utilize the same .lightning hidden directory to run ...
0
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0answers
13 views

How do i make a bitcoin miner in c++? [on hold]

So, i'm trying to make my own bitcoin miner so i don't get fees while mining bitcoin from 3rd party services so if anyone could help me? Thanks!
0
votes
2answers
21 views

How to get total transactions on the network with RPC

I have seen no concrete answer to this question anywhere. I assume it is possible to get the total number of successful transactions on the bitcoin network using bitcoin-cli command because most ...
1
vote
1answer
60 views

Why is the 'Estimated BTC Transacted' referring to just one of the multiple outputs?

I recently started learning about bitcoins and came by this transaction. Here there are multiple outputs so if we consider one of them to be the change received by the sender then why is the '...
4
votes
1answer
27 views

Which parameters in the Bitcoin Core config file need to be set correctly prior to IBD?

The majority of the parameters in the Bitcoin Core config file can be changed during or after IBD (Initial Blockchain Download) with no complications. However, there are some parameters in the config ...
1
vote
1answer
128 views

c-lightning: single tx multi-channel open stuck on CHANNELD_AWAITING_LOCKIN:We've confirmed funding, they haven't yet

I've tried to open multiple Lightning Network channels using a single Bitcoin transaction, with these steps: For every peer in PEERS (n=25) run: lightning-cli connect ${peer} lightning-cli ...
1
vote
1answer
61 views

How does BIP 39 mnemonic work?

As I already understood the mnemonics are the private key separated in 12 words which joined together in the very same order produces the private key. How are mnemonics generated? Why Ledger ...
0
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0answers
13 views

Force bip9_softforks activation

"bip9_softforks": { "csv": { "status": "failed", }, "segwit": { "status": "failed", } }, How to force in litecoin clone segwit and csv activation after certain block ...
1
vote
2answers
19 views

What happens when the last added block in a blockchain is corrupted?

What happens when the last added block in a blockchain is corrupted? Is it still possible for the block to be accepted by a majority of the miners?
0
votes
2answers
28 views

Some questions on segregated witness

I have some question on how segregated witness work. I'm reading this post and in the answer exist this phrase Since signature data (witness data) is stored outside the transaction (and outside ...
1
vote
2answers
26 views

Transaction from bitcoin core is different from the explorer

In tx 3a4a7087d4ece4503948b33aa77c807cda770575d229cbcb7dd8336ffa77445a the unique input is 1387e35f2c65f6664e15a98a43b7a70831e636635876a7154c99f38d89a9f795 with index vout = 1. When I request this tx ...
4
votes
1answer
282 views

Syncing bitcoin node with multiple cores

I'm syncing my node on 32 CPUs, and it's super slow. Obviously, syncing doesn't go in parallel. I wonder if there is any fundamental obstacle for "divide and conquer" way of doing it. So let's say ...
0
votes
0answers
14 views

How can I sync my Jubiter wallet [on hold]

So how can I sync my Jubiter wallet so u can receive some Bitcoin some one sent me or do I just call them?
0
votes
0answers
11 views

Value and Scarcity about Bitcoin cash [on hold]

I am relatively new to crypto community. What I am doing right now is just consistently stacking bitcoin whenever I have free capital.(trade on robinhood, average price about 10600/bitcoin, u can ...
0
votes
0answers
10 views

What APIs are available for finding pricing on cryptocurrencies across various exchanges? [on hold]

I am trying to create an arbitrage trading bot for cryptocurrencies. Are there any reasonably fast live APIs that can give the price of multiple different cryptocurrencies a
0
votes
1answer
24 views

Why is it not showing?

Someone from blockchain wallet send me some Bitcoin to my jubiter wallet #1BtQi9JmvTvyEBmbGvMQLUCEdUXQyZF21Y and it been two days still havnet receive nothing but it said it's confirmed what going on? ...
0
votes
1answer
22 views

Withdrawing virtual currency in India [on hold]

I hold alt coin like Steller Lumens & Omisego in Bittrex exchange. How can i withdraw these in Indian rupees ? RBI has banned virtual currency here and all the Indian exchanges as per as my ...
0
votes
0answers
15 views

Can funds sent to wrong/fraud wallet address be recovered? [duplicate]

I sent $800 to a wallet address sent to me by a "trading broker" but just scammed me out of my money! :( Is there ANY way my funds could be refunded back to my address at all? PLEASE HELP!
0
votes
2answers
32 views

Is it fraud? Would banks ask for fees through bitcoin?

So a man came to me on Instagram saying that he wanted to buy old money specifically from Hong Kong for a museum in Philadelphia, and that he would pay me good money for my old coins and bills, then ...
0
votes
1answer
27 views

How do I monitor a bitcoin blockchain explorer?

I wanted to monitor some four to five bitcoin blockchain explorers ( actually I want to monitor ZEC block explorers as well but starting with BTC as of now). I want to know how do I monitor them - ...
3
votes
2answers
32 views

Why don't nodes resume all existing outbound connections at restart?

The Erebus attack can, according to the authors, be accelerated by causing the victim node to reboot* at opportune moments. This is because the node will pick new outbound peers from a list that's ...
0
votes
0answers
20 views

Bitcoin Transaction Generation: Signature Verification Error

I have the following raw transaction (basic P2PKH) which I am trying to send to the Bitcoin Testnet 3: ...
0
votes
1answer
13 views

How did I get a Test net

I was downloading bitcoin for the first time and during the last 3 minutes while doing some other work on my computer, something about an interruption flashed and then it looked as if nothing had ever ...
1
vote
1answer
39 views

How do block explorer sites show information that is not available on Bitcoin Core?

As I understood in the following post How to get unspents for a specified bitcoin address?, we should use listunspent only on addresses that belong to our own wallet otherwise will return blank. But ...
0
votes
0answers
21 views

Can not connect to rpc server bitcoind 0.16

I have 2 server v0.18 and 0.16. They're nearly same config but I can't connect to v0.16 server via RPC though using command on it is still well eg bitcoin-cli -info. I have searched few configs and ...
0
votes
0answers
17 views

OfferCreate Transactions in ripple? [closed]

What is "OfferCreate" transactions in ripple ? OfferCreate transactions are created by normal accounts of only by gateways ?
0
votes
0answers
15 views

open source server for bitcoin wallet [closed]

For my simple bitcoin wallet, I use the blockcypher.com api. There is a problem due to the limitation of the number of requests for api, so I need to make my "api blockcypher.com", which would be ...
1
vote
1answer
21 views

Fetch UTXO Bitcoin to address created by rpc importprivkey without rescan like other api

For few reasons, I must use rpc node to handle wallet at this time. In the near future, I will change the flow to use library to create addreses, store privatekey at database and create raw ...
1
vote
0answers
13 views

What is differences of bitcoin mempool anchestor and descendant?

is there a specific explanation about the differences between mempool anchestor dan descendants? each node may have a different mempool size, but what are the differences of the mempool anchestor dan ...
0
votes
1answer
6 views

How to get Bitcoin input transaction hash string from bitcoinjslib Transaction object?

I'm using bitcoinjs-lib and its Transaction object. Transaction.ins is an array of objects, each which has a hash and script property. Both of these properties are Uint8Arrays. I am trying to get ...
0
votes
0answers
10 views

How do create Intermediary between an acic machine and minimg pool?

I need vps Intermediary between asic miner and mining pool ... normal mode : asic miner >> minig pool Required Mode: asic miner >> VPS >> mining pool How can I do this?

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