All Questions

0
votes
0answers
3 views

Does BTC return fee in a failed transaction?

From wiki 'The fee may be collected by the miner who includes the transaction in a block.' wiki So I think it will return your fee , in a failed transaction.But I can't find any other article about ...
0
votes
3answers
101 views

Regarding Private Key

Good day. Can you help me out regarding my question. The company (legal entity) at the moment want to confirm the fact, tha certain BTC core wallet actually belongs to her. Though, i would like to ...
0
votes
2answers
15 views

What are the cryptocurrencies of P2P technology?

For example, IPFS, Storj, PPIO, Sia, what are the differences between them?
1
vote
1answer
6 views

Hosting bitcoin in Istio

I have been hosting my bitcion node in a simple Kuberenetes setup (without istio). I recently learnt about istio https://istio.io/ and want to use it for hosting my bitcoin node. However, I am not ...
2
votes
2answers
30 views

How does the structure of a segwit block differ from a non-segwit block?

Is there any difference in the structure of a segwit block in comparison to a traditional non-segwit block? A diagram would be helpful if possible.
0
votes
2answers
49 views

Who is funding the Beam mimblewimble development team?

Since there is no-premine with the Beam mimblewimble project. How and who are funding their development?
3
votes
2answers
127 views

Mimble Wimble chain privacy

Does Mimble Wimble automatically perform transaction cut-through, or is one able to retain a record of every single transaction (the entire blockchain) if they choose to?
3
votes
2answers
159 views

What are the differences from the 2 main mimblewimble implementations, BEAM vs GRIN?

Beam is being released tomorrow, but Grin has not yet. What are the main differences from these 2 mimblewimble implementations?
2
votes
1answer
520 views

What is the maximum size of a DER encoded ECDSA signature?

I've been told by a seasoned Bitcoin contributor that signatures in Bitcoin could be up to 75 bytes. I'm curious to find out how that maximum comes to pass. According to this answer on Why the ...
1
vote
3answers
1k views

How to store private data in blockchain and smart contract

Following my previous question on this topic Is there a way to store and share a private key through blockchain?, I might have a solution but I would like to improve the process. Image that A is the ...
1
vote
1answer
21 views

can not access via RPC to litecoin node

I set up a litecoin full node in AWS. I opened ports 22, 80 and 9332. Also from my laptop I cloned this project https://github.com/janoside/btc-rpc-explorer I executed on my local but unfortunately I ...
1
vote
3answers
636 views

Electron Cash wallet password not working!

I downloaded the wallet software from electroncash.org, version 2.9.4. I then transferred some Bitcoins from Coinbase using shapeshift to my new BCH wallet and after a few minutes, saw my tokens ...
1
vote
1answer
21 views

Could LN wallets be seamless?

Currently, the funds deposited in a payment channel cannot be sent on-chain without closing the channel. Similarly, the user must open a brand new channel in order to deposit some on-chain funds into ...
2
votes
2answers
72 views

API for multiple blockchains

Is there an API to get data for multiple blockchains? Most blockchain explorers already offer an API but I'd like to be able to get information for different blockchains through the same API.
0
votes
0answers
12 views

How to sign multisig transaction in Go

I'm trying to sign a multisig transaction (3 of 4 signatories) in Go using some btcd packages. The following function should sign the transaction: func SignMultisigTransaction(rawTransaction []byte, ...
1
vote
1answer
17 views
-2
votes
0answers
12 views

I can not make api key

I can not make api key. Alert appeare. I do not understand. Why? Please tell me How to make indiesquae SDK api key.
1
vote
1answer
16 views

Is the unencrypted copy of the wallet still usable after a copy is encrypted?

My wallet is not protected with a password, I have a few receiving addresses generated and a some funds in it, then I make a copy of the wallet and I set a password on this one. Will the old ...
-3
votes
1answer
94 views

Removing “hub-and-spoke” property of Lightning Network?

Lightning Network is based on this idea: "Near-zero fee transactions with hub-and-spoke micropayments" (Link to the article) proposed by Peter Todd. An article entitled: "Mathematical Proof That the ...
-1
votes
0answers
14 views

Forking PIVX - ERROR: CheckBlockHeader() after compiling

I have fork PIVX and generated new genesis block hash, merkle root and nonce. It compiles fine and the daemon starts. But use 100% CPU and ..-cli getinfo will not show any. Also when in open the ...
-1
votes
1answer
23 views

Limitation for minimum output size? AND a fixed per-transaction fee for payments in Bitcoin?

In the following article by http://lightning.network/ entitled: "The Bitcoin Lightning Network Summary", (Link to the article) is mentioned: "Lightning enables one to send funds down to 0.00000001 ...
0
votes
1answer
9 views

How does an SPV client forms a transaction which is then Broadcasted?

As per my understanding, an SPV client only keeps a track of the block headers in its own database. So when a user tries to send bitcoins using that particular SPV client, how is the transaction ...
2
votes
1answer
36 views

How does nSequence/Check Sequence Verify work?

How does relative timelock work? I mean, I know the theoretical description, but how to use nSequence concretely ? Can you do me a practical example with 2 sample transactions one of which locked with ...
3
votes
2answers
7k views

Which Exchanges Allow Short Selling/Margin Trades with USD/BTC or USDT/BTC

I think Bitfinex did. But for example Poloniex has USDT & BTC but does not allow short selling with USDT.
0
votes
1answer
25 views

Are there services which I can offer to earn bitcoins? [duplicate]

Yes, I am a noob at this. I was wondering if anyone could let me know if I could do something sitting on the desk to earn some crypto-pie. Also please explain how will I be able to use my bitcoins to ...
0
votes
0answers
21 views

Coimarketcap api data different from coinmarketcap.com

I am using popular Coinmarketcap API request: https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest?limit=100&convert=ETH In response percentChangeFor24h and some other parameters ...
0
votes
0answers
10 views

Bitcoin Core 'unable to open file' causes reindexing to fail SOLVED

I recently struggled to send bitcoin from my Armory wallet (0.96.5) to another account. Sending bitcoin did not work because the wallet could not synchronize with the blockchain. Since Armory relies ...
0
votes
2answers
49 views

how bitcoin reject invalid transaction? (with createrawtransaction)

i'm studying 'Mastering Bitcoin' and have a questions, in this book, we can send coin to other wallet by createrawtransaction but there is no enough secure method. we can find other's wallet ...
0
votes
1answer
15 views

Can you send a transaction from non-native segwit to native(bech32) segwit address?

Let's say I have a wallet with a non-native segwit address (prefixed with 3- like multisig). Can I send my utxos from this address to a native segwit (bech32) address?
-1
votes
1answer
47 views

How to do a 51% attack on my own altcoin [on hold]

recently I have been curious about 51% attacks so I created a fork of litecoin and want to do a 51% attack on the coin but don't know how to. please can you tell me how to do it. Thanks,
0
votes
0answers
11 views

Recommended Bitcoin Frameworks to use for iOS Development?

I've been researching on this topic for a heavy long amount of time and I'm still not sure regarding this topic, any little insight, information you would share I'd be more than thankful to you. For ...
3
votes
2answers
410 views

How relevant is the Chinese Great Firewall in the blocksize debate?

Mike Hearn said the following: The reason the true limit seems to be 700 kilobytes instead of the theoretical 1000 is that sometimes miners produce blocks smaller than allowed and even empty blocks,...
1
vote
1answer
18 views

Why is the wtxid considered malleable?

Why is the wtxid considered malleable since the transaction is unconfirmed? How can a third-party modify it?
0
votes
2answers
28 views

How to fund a bidirectional payment channel?

Assuming two users want to create a bidirectional channel between themselves such that user_1 wants to pay 2 BTC to user_2 at the end and he divides this amount into 10 micro-payment (each micro-...
1
vote
2answers
31 views

How is proper fee rate got on Bitcoin Cash

I'm developing wallet system trading BTC, BCH and so on. In BTC, I'm using estimatesmartfee API to calculate by transaction size and relayfee to guarantee minimum fee and it works well. In BCH, though ...
1
vote
1answer
42 views

Bitcoin multisig contract - to Lock coins with nTimeLock (BIP65)

I really need help. I am currently Developing a Bitcoin wallet and want to build in a SMS Based send function where the sender does not need to know the receiver publicKey. After the contract get ...
20
votes
3answers
10k views

Is Each Bitcoin Address Unique?

I am wondering whether each bitcoin address is unique. I would assume yes. Then how is this enforced (distributed address generation)? As I understand it each time, an address is generated a new key-...
0
votes
1answer
198 views

Sendrawtransaction error with locktime : 64: non-final txid

I have created raw transaction with locktime and sign it. The lock time is already passed but still got error like this when sendrawtransaction 64: non-final txid the locktime value is 1523515709 ....
0
votes
1answer
33 views

Transaction haven`t got

5 days ago some Pokerroom sent to my Bitcoin Core wallet a slight amount of bitcoin. I checked it on Blockchain, it's OK. But, unfortunately, still there is no bitcoins in my wallet. I've also sent ...
1
vote
1answer
22 views

Non-spend Blockchain.com

A bitcoin trader opened a blockchain wallet for me and then sent me my profit but it is non-spendable. I know they can no longer get into my account because I changed the password and I have two-step ...
0
votes
1answer
22 views

Can can I identify my deposits to a wallet on a BTC (or LTC) blockchain (using the blockcypher api)

I'm trying to reconcile my deposits to a wallet (happens to be LTC) on an exchange account with the data on the blockchain. I was using the logic: if tx_input_n is -1 then transaction is a ...
0
votes
1answer
43 views

Bitcoin wallet website

I am new in bitcoin. I am developing a PHP website to let users build their wallet on my website. I want to give every user a wallet. I do not want to give users private keys. I keep private keys, so ...
4
votes
2answers
10k views

How to generate a testnet address?

Bitcoin addresses can be generated on this site https://www.bitaddress.org, but the test network needs m or n at the beginning of the address, where can those be generated?
0
votes
2answers
31 views

Reference an UTXO of a transaction that has not been yet mined

How to reference an UTXO that has not been yet mined? I want to prepare a transaction and, before spreading it, use its UTXO as input for another relative timelocked transaction. Then, spread the ...
0
votes
0answers
36 views

Watch-only addresses inside segwit transactions

I'm using bitcoin core (via rpc api). I've generated one 2of2 multisig address on electrum wallet, and after that, I've imported that address into bitcoin core by using importaddress rpc method. When ...
3
votes
3answers
41 views

Does a bitcoin node broadcast that it is full synced?

When a bitcoin core node is fully synced, does it broadcast to the rest of the network that is has finished syncing? If yes, where in the bitcoin-core source code is this implemented?
0
votes
1answer
12 views
0
votes
2answers
34 views

Sent BTC to public key instead of my address

Friend of mine was trying to buy BTC from ATM, instead of BTC address he scanned the public key from coinomi wallet (I dont know why the ATM accepted it, but it did). Is it possible to somehow access ...
0
votes
1answer
12 views

I can not get btc on Copay wallet

1EcWMDBH3W6CLu5nM9CjvqbFZefvdv8y1a I send 2.48 btc to this add on Copay wallet. But now, i can see on Copay. Copay say: network error. Please help me!!
0
votes
1answer
12 views

How to subscribe for blockchain webhook

Please how do I get to subscribe to a BTC address to webhook for unconfirmed transactions?

15 30 50 per page