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0answers
26 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
20 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
34 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
25 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
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0answers
67 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
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3answers
42 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
28 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
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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
17 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
3answers
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
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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
17 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
22 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
84 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
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0answers
14 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
13 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
34 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 ...
0
votes
1answer
38 views

Fork and Longest Chain Rule

At the same time, A and B succeed in resolving the "Proof of work" challenge and both add a new block to their local blockchain, then they propagate the new blockchains to other nodes. I have 2 ...
0
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0answers
35 views

Bitcoin lost forever because it “timed out”? Or no? [closed]

Ok so I made a $50 bitcoin deposit to a gambling site. IM NOT CONCERNED WITH THE $50, ALTHOUGH IM VERY CONCERNED HOW THIS COULD HAPPEN? WHAT IF IT WAS A LARGE AMOUNT OF $?! And they weren’t trying to ...
0
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0answers
10 views

ASIC G32 1800 PSU miner

I recentely purchased a G32-1800 W miner. Do I need a particular PSU? Or does it just need to be rated at least 1800Watts?Cheers
0
votes
1answer
20 views

Input of a transaction

If i want to send 0.2 bitcoin to Bob, will my transaction (in the input field) contain the list of all my previous transactions (both the ones in which i received bitcoins and the ones in which i sent ...
-2
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0answers
28 views

Is bitcoin the world’s first (highly specialized) yottascale computer?

I’ve read that one bitcoin hash uses 12,700 floating point operations. The bitcoin network, as of writing, is roughly 9*10^19 hashes per second. I plugged the numbers from difficulties in the past in, ...
0
votes
1answer
29 views

Mining process in a blockchain

Let's consider a blockchain. They mining nodes are listening to transactions and every one is building is own block. Due to latency and other issues, every miner is probably building a different block,...
2
votes
2answers
359 views

Does every node has a whole copy of the blockchain?

As i read here, in a blockchain "each node the has a copy of all transactions ever made". This to me seems impossible, bitcoin exists for a long time, and the memory size of the intere blockchain ...
0
votes
0answers
16 views

Lost Bitcoins on kasse wallet

I was opening my Kasse hardware wallet and the software requested to be updated, ok, so I updated. After it updated I opened the wallet and my bitcoins didn't show up. I can see all the transactions ...
2
votes
1answer
16 views

Non indexing bitcoin and output lookup

Using bitcoin's RPC and txindex=0 is it possible to tell the difference between an existing output being already spent and a non existing transaction output (or transaction id)? Looking at gettxout it'...
0
votes
0answers
29 views

Cracking Scrypt or SHA-256 for Mining

My question is if an individual cracked Scrypt (for Scrypt based cryptocurrencies like Litecoin) or SHA-256 (for SHA-256 based cryptocurrencies like Bitcoin) and then used that cryptographic knowledge ...
0
votes
1answer
16 views

BIP32 funds not appearing in wallet

So I'm developing a system that generates addresses for users to send bitcoins too in order for them to deposit on the system. I generate addresses using the following: var derivedPubKey = config....
0
votes
1answer
40 views

Verify Bitcoin Transaction

Following the great post [Redeeming a raw transaction step by step example required, I came up with code below but the verification failed. // pubkeyBytes, len: 65 // ...
2
votes
1answer
19 views

Does node order have meaning in a JSON describing the Lightning network graph?

LN clients can export their view of the network as a JSON file. For instance, in a file obtained from LND, a channel (edge) is described by this structure: { "channel_id": "555479871492063233", ...
0
votes
1answer
28 views

Why bech32 addresses can’t be mixed case?

I know that they cannot be mixed case due to their BIP but what was the intention behind this idea and would it be problematical to convert a mixed case bech32 address to a lower/upper case bech32 ...
0
votes
1answer
20 views

How would these parameters affect mining and the size and content of the mempool?

Q1 and Q2 are theoretical questions to confirm my understanding. I know doing the following serve little practical purpose. Q1: If a mining pool were to set blocksonly=1 in their bitcoin.conf, would ...
1
vote
0answers
21 views

How to generate unspendable testnet bitcoin address with python?

I'm trying to generate a testnet address. However, I tried to write this python program (using help of various online code places), and I created this program. The program is designed to take a 20 ...
0
votes
1answer
12 views

why using `blockIndex` in bitcoin's code `unconfTxs`

I am reading the code of rpc's estimateSmartFee method , and I can't understand why using blockIndex in unconfTxs ? estimateSmartFee loop unconfTxs to get feeRate(code: https://github.com/bitcoin/...
1
vote
1answer
29 views

Knowing if a public address is spendable by an HD seed?

I want to know if an address is spendable by an HD seed and for that purpose I am using the following command: > bitcoin-cli getaddressinfo 3LFc64RRd96ejjYvm14KaogBF9fmeNmePW | jq '.solvable' ...
0
votes
0answers
27 views

How to Generate an Extended Private Key from Command Line?

I'm trying to create an extended private key so I can create multiple public addresses that can be controlled using a single master key. I have a library which handles most of what I need, but I need ...
1
vote
1answer
28 views

When exactly do the transactions get validated?

I have some gaps in my understanding to the life cycle of the transaction that I want someone to help me fill them specially with the validation. What I understand about the life cycle with my ...
0
votes
1answer
23 views

What would the effect of a very long bear market be on the Bitcoin economy?

I don't mean to be a doomsday prophet or spread FUD, but I need to know if Bitcoin (or any PoW coin) investors should be concerned about the following scenario: Assume Bitcoin goes in a very long ...
0
votes
0answers
76 views

Blockchain unconfirmed transaction script to hack the unconfirmed transactions [closed]

Please do anyone here have the blockchain unconfirmed transaction script, please help me with it, it is a type of script that is used to send the unconfirmed transaction to your blockchain wallet, ...
4
votes
0answers
39 views

Can we measure bitcoin's accumulated work in terms of entropy (in bits) directly rather than expected number of hashes?

The Background Bitcoin tracks chain work by counting the (expected) minimum number of hashes it would take to create a chain of the same number of blocks and same difficulty steps[1]. Naturally, ...
0
votes
1answer
14 views

Difficulty in verifying bitcoin-core signing keys

How can I verify bitcoin0.19 signature bwith gpg? I read I should use gpg --recv-keys signingkey, but I don't understand where is the file signiggkey. I tried to download Bitcoin Core Release Signing ...
0
votes
2answers
44 views

Sent BTC from Coinbase, blockchain explorer says Confirmed. Is recipient lying or could something else be the issue?

Sent BTC (approx $500) from Coinbase, Blockchain explorer says Confirmed. Is recipient lying they have not received or could something else be the issue such as his wallet? Recipient says it could be ...
0
votes
1answer
39 views

Use hdseedid to give all addresses in bitcoin

I'm using bitcoin core version 0.18.1 and I'm studying Hd Wallet. I can see the value hdseedid, and I understand that it's HASH160 of my hd seed. Can I use this seed to retrieve all my keys? I tried ...
1
vote
0answers
34 views

Manipulation of Bitcoin RPC with programmatically

I'd like to use Bitcoin source code(only RPC part) to manipulate with programmatically. I have bitcoind and bitcoin-cli installed in my local computer but I don't know how to write code for my ...
2
votes
1answer
19 views

Can bitcoind and btcd share a datadir?

I've already fully synced the blockchain with btcd, can I point bitcoind at the same datadir and use its contents?
0
votes
1answer
17 views

Words to seed translation

In bitcoin wallet that support bip39 mnemonic code, is there a way to get the 12/24 words from the seed generated by them? Or the translation is one-way only (from words to seed)?
0
votes
0answers
16 views

Is there online tool to check if bitcoin transaction is bip-125-replaceable

bitcoind json-rpc can do it, I think I saw this on blockchain.info but I don't see it now.

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