17 votes
Accepted

What is the origin of insecure 64-bit nonces in signatures in the Bitcoin chain?

Based on the time-frame and my impression of the capabilities of the various groups developing wallet software during that period my initial guess was that the Bitpay copay software might be the ...
G. Maxwell's user avatar
  • 7,727
5 votes
Accepted

How to decode raw transaction which has 00 in '#TxIn' slot?

This is a SegWit transaction, serialized using the new format defined in BIP144. The format is only permitted when at least one of the transaction inputs has a witness, and works as follows: 4-byte ...
Pieter Wuille's user avatar
4 votes
Accepted

Performance and modularity of Bitcore vs Toshi

Both are implementations of the Bitcoin protocol, however they are customized to make it easier to develop with. They are able to do this by storing all transaction and blockchain data in a database ...
m1xolyd1an's user avatar
  • 5,646
4 votes

Confused by various apis scriptPubKey

These are API names and display scripts in their encoded and or decoded form. What you want to build a transaction is the encoded form like the one returned by toshi (script_hex) or smartbit (hex). A ...
alcio's user avatar
  • 81
4 votes
Accepted

Litecoin litecore-lib receive UTXO and current balance

I used the request library to manually retrieve information from the insight API. I also used the litecore-lib library to create the transaction. var Litecoin = require("litecore-lib"); var request = ...
Monstrum's user avatar
  • 1,334
3 votes
Accepted

Insight-api: Websocket "tx" event - which variables?

What you are looking for is in the lib\transactions.js file. Line 210 to 215. var transformed = { txid: transaction.txid(), valueOut: valueOut / 1e8, vout: vout, isRBF: isRBF, }; ...
Chak's user avatar
  • 1,301
3 votes
Accepted

Can I run Trezor Wallet against my own local node on OSX?

Bitcore fork from SatoshiLabs is indeed available only for 64-bit linux. You can try to build the necessary binaries yourself and then update the npm install scripts in bitcore, but that is very hard....
Karel Bílek's user avatar
  • 2,695
3 votes

Bitcore full node list with Wallet service enabled?

Nodes don't provide wallet services (like Bitpays Bitcore [don't mix that up with Bitcoin Core]). The only service they provide is SPV transaction filtering (which is much "slower"). Running your own ...
Jonas Schnelli's user avatar
3 votes

How does bitcore-node get its data?

A Bitcoin blockchain indexing and query service. Intended to be used with as a Bitcoin full node or in conjunction with a Bitcoin full node. From the first line of the README. It’s an out of date ...
Claris's user avatar
  • 15.4k
2 votes
Accepted

'01' at the end of signatures

It is the hash type, in this case it is SIGHASH_ALL. To verify the digital signature inside of the Script language, it is required to have a hash type appended to the end of the digital signature. ...
Chris Stewart's user avatar
2 votes

bitcored fastsync

Syncing to the blockchain involves a lot of downloading, disk usage, and computation. Look at what resources are being used the most, one of them will be the bottleneck. For me it was my hard drive ...
HighInBC's user avatar
  • 154
2 votes

Bitcore = "Error: More than one instance of bitcore-lib found"

I don't know if that's the right method but it does work. delete global._bitcore var bitcore = require('bitcore-lib')
01BTC10's user avatar
  • 353
2 votes

is there any API like blockchain.info and bitcore with tutorial?

Bitcore has excellent documentation and examples... It sound like you are familiar with their forums but maybe not their developer site? Get Started: https://bitcore.io/start Guides and Tutorials: ...
bigreddmachine's user avatar
2 votes

is there any API like blockchain.info and bitcore with tutorial?

Check out 21. There are some bitcoin tutorials as well as a developer community.
wbnns's user avatar
  • 91
2 votes

How to Get UTXO using bitcore-lib?

You can use bitcore explorers module to use Insight send transaction and get utxos data. Check further https://github.com/bitpay/bitcore-explorers
Henrique M.'s user avatar
2 votes
Accepted

How much transaction fees are taken by bitcore for API use?

Bitcore is open source software provided at no charge, so there is no fee you have to pay to the BitCore software authors. When creating a Bitcoin transaction, it is highly recommend that you pay a ...
David A. Harding's user avatar
2 votes

Trezor issue - "The bitcore server does not reply. Cannot connect to wallet"

Try the other servers. This means Trezor's blockchain explorers (for example, this one: https://btc-bitcore3.trezor.io) are under maintenance, or restarting, or can't be connected (DNS/ISP problems).....
MCCCS's user avatar
  • 10.2k
2 votes

Connect already running bitcoind with bitcore for bitcoin explorer

Bitcore has made an implementation of bitcoind and named it as bitcored. The fact that you are running bitcoind first and then bitcored, bitcore is trying to access the same ports as bitcoind. Also ...
Shabahat M. Ayubi's user avatar
2 votes

Connect already running bitcoind with bitcore for bitcoin explorer

it seems to be that there are some bitcoind processes that have zombied out and listening to your port. try to run this command to kill the other processes killall -9 bitcoind
Tailer's user avatar
  • 3,669
2 votes

Invalid Argument Error when broadcasting a transaction with Bitcore

Either create the transaction using constructor: var transaction = new Transaction(); or pass serialized transaction to broadcast method: insight.broadcast(tx.serialize(), ......
Maciej Rogoziński's user avatar
2 votes
Accepted

Check number of active peers a node has

No, by design. Being able to infer connection information of remote nodes would be a leak of network graph information, which is considered private.
Pieter Wuille's user avatar
2 votes
Accepted

How to create a P2SH address with bitcore-lib

Here is the reference for creating a P2SH multisig address https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/addresses.js#L44 However your question states "custom" P2SH ...
m1xolyd1an's user avatar
  • 5,646
2 votes

bitcoin address from xpub key

According to BIP32 you're trying to generate a non-hardened child address, see BIP32 - Public parent key → public child key. Using bitcore-lib, to derive a non-hardened child public key and a P2PKH ...
JBaczuk's user avatar
  • 7,388
2 votes
Accepted

Does Electrum use Bitcore Apis as it's backend?

Electrum uses the electrum-server backend (electrumx is a newer variant) In fact, electrum actually predates bitcore by about 2 years. As to why there are multiple implementations of similar APIs ...
Raghav Sood's user avatar
2 votes

Extracting Bitcoin historical ticker data by setting up Bitcoin Node?

The Bitcoin Node is part of the blockchain network. It has nothing to do with markets and trading, and has no concept of a price. As far as the node is concerned, 1 Bitcoin = 1 Bitcoin, and that's it. ...
Raghav Sood's user avatar
2 votes
Accepted

How does BitCore work?

Node - This is a node.js implementation of a full node, it is different from the original, Bitcoin Core, which is written in C++. A full node downloads every block and transaction and check them ...
JBaczuk's user avatar
  • 7,388
2 votes
Accepted

Exodus exported private key

You are probably deriving a legacy P2PKH address (addresses that start with 1) versus the bech32 P2WPKH address (addresses that start with bc1) that Exodus uses. A single WIF private key can generate ...
m1xolyd1an's user avatar
  • 5,646
2 votes
Accepted

Deriving payable address from mnemonic using BIP44

When you say simplified code it's hard to tell where you are going wrong. Here's an example of how you can derive a bip44 key pair from a mnemonic using bitcoinjs-lib v3.3.2 let mnemonicInput = 'width ...
m1xolyd1an's user avatar
  • 5,646
2 votes

Saving privateKey client side to local storage

Am I able to save to local storage the privateKey object generated with 'new bitcore.PrivateKey()' "Able" vs "should". Yes you are able to save whatever you want to localStorage ...
m1xolyd1an's user avatar
  • 5,646
2 votes

Do Bitcore APIs have daily limits?

I’m not sure I properly understand your question. If you’re asking about a self-hosted instance of the publicly available Bitcore software: I suppose it’ll give you whatever data it can manage, and ...
Murch's user avatar
  • 75.3k

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