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Derive in batches, addresses of an xpub programmatically. Development & Technical Discussion
Quote You could always check out the extension for libsecp256k1 https://github.c…
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n/a | fbueller | November 16, 2016, 04:46:43 AM |
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Derive in batches, addresses of an xpub programmatically. Development & Technical Discussion
hd-wallet-addrs seems to wrap `bitwasp/bitcoin` which has advanced several versi…
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n/a | fbueller | November 15, 2016, 07:56:33 PM |
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Validate Bitcoin address thru web api or php Service Discussion
I maintain `bitwasp/bitcoin`which is available through composer. It lets you do…
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n/a | fbueller | August 18, 2016, 04:44:43 PM |
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Mass Private Key to Bitcoin Address Converter Development & Technical Discussion
Find someone to google it for you!
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n/a | fbueller | August 09, 2016, 07:07:11 AM |
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Bitcoin Node - Inform Beyond 1st Confirmation Bitcoin Technical Support
Track created outputs from new blocks which fund the scriptPubKeys your applicat…
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n/a | fbueller | July 30, 2016, 10:44:29 AM |
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Private/Public key question Development & Technical Discussion
You can't do this with Ledger AFAICT, it uses HD wallets under the hood. They're…
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n/a | fbueller | July 27, 2016, 08:49:30 PM |
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Help to understand automatic cryptocurrency payments Project Development
They have an order book, tap into exchanges to facilitate payments, and maybe ac…
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n/a | fbueller | July 26, 2016, 02:15:49 PM |
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Is it possible to integrate a reputable Bitcoin wallet service in a website? Development & Technical Discussion
I’m planning to build a peer to peer marketplace website where the users themsel…
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n/a | fbueller | July 10, 2016, 08:28:35 AM |
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How to come from a secret exponent to a Bitcoin private key? Development & Technical Discussion
Hey Guys,I just made a batch file which gives out random secret exponents (like…
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n/a | fbueller | June 25, 2016, 03:26:52 PM |
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Bitcoin ecosystem and stack Development & Technical Discussion
Something great is the bitcoinconsensus.h library, for verifying transaction sig…
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n/a | fbueller | June 06, 2016, 07:37:39 PM |
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wallet.dat password question Bitcoin Technical Support
The password is purely for encryption purposes. If someone has an older wallet.d…
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n/a | fbueller | June 02, 2016, 09:47:26 AM |
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simple python bitcoin public key to address Development & Technical Discussion
Why not go for python-bitcoinlib, or pybitcointools? They include functions to d…
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n/a | fbueller | May 27, 2016, 12:54:12 PM |
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is there option to send bitcoin payment using curl ? Web Wallets
What exactly are your requirements here? Most wallets aren't engineered in the w…
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n/a | fbueller | May 27, 2016, 12:41:22 PM |
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BIP32 with string indexes Development & Technical Discussion
Hash the string and split it up into 8 4-byte chunks, using those as your indexe…
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n/a | fbueller | May 20, 2016, 08:17:48 PM |
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show balance from a btc address Project Development
Insight servers are open, but you need to find them. Simple curl requests will d…
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n/a | fbueller | May 20, 2016, 06:24:13 AM |
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Private keys, Public Keys and Bitcoin Addresses Development & Technical Discussion
When I send you money, I am only sending it to a Bitcoin address; I don't know y…
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n/a | fbueller | May 17, 2016, 08:38:35 PM |
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Private keys, Public Keys and Bitcoin Addresses Development & Technical Discussion
I expect the hash test is first is to avoid unnecessary resource consumption. If…
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n/a | fbueller | May 16, 2016, 10:06:54 AM |
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[solved]How decode raw transaction? Development & Technical Discussion
OP is confusing two different serialization artifacts. Outputs look like this:[f…
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n/a | fbueller | May 12, 2016, 07:00:51 AM |
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Simple logic to avoid confusing tx fee with transaction amount Development & Technical Discussion
It's possible the person wasn't using Bitcoin Core at all, and crafted the trans…
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n/a | fbueller | May 12, 2016, 06:42:35 AM |
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Bitcoin needs to move to POS. Thoughts? Development & Technical Discussion
There seems to be a consensus of some people here that PoS is not secure, but I…
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n/a | fbueller | May 01, 2016, 03:12:45 PM |
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Transaction with Many Outputs Development & Technical Discussion
You might be missing re-org's. A block might be replaced by another, undoing the…
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n/a | fbueller | May 01, 2016, 03:04:44 PM |
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whether each web wallet can only be used by one user Bitcoin Technical Support
Don't do what you're thinking of doing!A minor compromise of the public facing w…
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n/a | fbueller | May 01, 2016, 09:55:03 AM |
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Lightweight client for PHP Bitcoin Technical Support
Pruning is helpful if you want to use bitcoind. As for a lightweight client in P…
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n/a | fbueller | April 20, 2016, 08:12:15 AM |
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Found 8 Virus on chainstate Bitcoin Technical Support
Unless one of them actually affects Bitcoin Core (which has never happened befor…
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n/a | fbueller | April 17, 2016, 07:40:48 PM |
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Bitcoin intrinsic value equals Bitcoin's Scripting Language ? Bitcoin Technical Support
Nothing is lost by having 'standard' output types - P2SH (and soon, segregated w…
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n/a | fbueller | April 17, 2016, 07:32:57 PM |
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Why does the Bitcoin protocol send transactions twice? Development & Technical Discussion
Because your node requests them twice. A newly broadcast transaction has to be d…
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n/a | fbueller | April 06, 2016, 08:16:04 AM |
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Turing completeness and state for smart contract Development & Technical Discussion
The simple answer is no - what you suggest will never happen. Despite both being…
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n/a | fbueller | April 06, 2016, 08:12:08 AM |
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Anyone developing for Lightning network? Development & Technical Discussion
See the #lightning-dev on freenode, or the mailing list
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n/a | fbueller | April 03, 2016, 08:41:22 AM |
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what's meaning of these params? Development & Technical Discussion
The first part is the genesis block, the rest are other constants related to net…
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n/a | fbueller | March 29, 2016, 08:01:07 AM |
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New Project; Distributed Hierarichical Blockchain Development & Technical Discussion
We're at this point,bitcoin is being labelled as a known Ponzi. Implementing the…
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n/a | fbueller | March 27, 2016, 06:15:42 PM |
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New Project; Distributed Hierarichical Blockchain Development & Technical Discussion
You're not the first to propose this - no one's pulled it off however. Care to d…
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n/a | fbueller | March 26, 2016, 11:52:38 AM |
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Segwit details? N + 2*numtxids + numvins > N, segwit uses more space than 2MB HF Development & Technical Discussion
As for the non-mining relay nodes, they are aberrations that have no place in th…
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n/a | fbueller | March 26, 2016, 01:07:54 AM |
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Question about SegWit Development & Technical Discussion
I'm not sure this would ever be a problem. Look at the payment protocol; it basi…
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n/a | fbueller | March 24, 2016, 11:14:09 AM |
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Is it possible ? Electrum
I recommend against the trusted USB approach, they are too easily formatted/brok…
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n/a | fbueller | March 24, 2016, 12:01:03 AM |
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Segwit details? Development & Technical Discussion
Sipas implementation is available here: https://github.com/sipa/bitcoin/pull/8
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n/a | fbueller | March 15, 2016, 09:40:03 AM |
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Mining subsidy in a DAG Development & Technical Discussion
Out of the talks at Hong Kong, I enjoyed this video as an intro to DAG. https://…
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n/a | fbueller | February 11, 2016, 03:00:00 PM |
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Conflict between Block trail / Block chain / Wallet Investor-based games
https://www.blocktrail.com/BTC/tx/36b8043dccea499d6678d6098335fb86982c2531e36ed2…
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n/a | fbueller | February 08, 2016, 01:31:31 PM |
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Bitcoin pushTx fail - Non-canonical signature Development & Technical Discussion
The error is rather well documented - it leads to malleability so is forbidden b…
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n/a | fbueller | February 07, 2016, 04:08:24 PM |
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What are the first 4 bytes in a block? Development & Technical Discussion
Versions can change over time, so they use something fixed (the magic bytes) to…
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n/a | fbueller | February 02, 2016, 07:45:39 PM |
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Need shopping cart module that uses pre-generated address list Development & Technical Discussion
A module would be great, cos preparing the transactions is a client-side issue.I…
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n/a | fbueller | February 01, 2016, 04:36:17 PM |
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Blockstream Investors ~~~ REKT!!!! (and pissed?) Bitcoin Discussion
I know I would be pissed if I was a Blockstream Investor. Blockstream can't see…
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n/a | fbueller | February 01, 2016, 12:04:09 PM |
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Need shopping cart module that uses pre-generated address list Development & Technical Discussion
I wrote one a while ago in PHP, but haven't had the time to keep it up to date a…
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n/a | fbueller | February 01, 2016, 11:16:47 AM |
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Is it possible to use the Blockchain to prevent vote-tampering? Development & Technical Discussion
2.c) We could pre-mineSounds like a scam :sIn all fairness, the government could…
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n/a | fbueller | January 28, 2016, 03:07:22 PM |
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Lightning Network, SegWit and contacts Development & Technical Discussion
They're still working on it. Maybe reach out using their mailing list.
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n/a | fbueller | January 23, 2016, 10:25:18 AM |
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A small optimization Development & Technical Discussion
That number, n, and the address would be consensus derived, meaning it can chang…
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n/a | fbueller | January 15, 2016, 11:26:15 AM |
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Feature Request - Deterministic Import Wallet software
Imagine you used a BIP44, BIP45, and some custom BIP32 paths from the same seed:…
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n/a | fbueller | January 15, 2016, 06:59:18 AM |
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Is a reduced reward time possible? Development & Technical Discussion
I was just curious if the reward time could be reduced from every ten minutes (t…
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n/a | fbueller | January 15, 2016, 06:54:17 AM |
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Announcing BlockCypher's Transaction API: create&manage bitcoin transactions Development & Technical Discussion
This is PHP and the syntax is very similar to C. If you see the link I provided,…
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n/a | fbueller | January 15, 2016, 06:34:45 AM |
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Browser as a node - Technically Possible ? Development & Technical Discussion
It's feasible if it's an SPV wallet, not a full node. Storing the headers costs…
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n/a | fbueller | January 13, 2016, 07:56:07 PM |
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Secure Linux Distribution for Bitcoin using? Development & Technical Discussion
For once off access, use Tails. You could use Electrum, which is installed in Ta…
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n/a | fbueller | January 11, 2016, 08:25:32 PM |
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How to convert Hex keys to WIF as a math problem? Development & Technical Discussion
I have an implementation that illustrates the maths - it's mostly a generic base…
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n/a | fbueller | January 09, 2016, 09:42:35 PM |
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Is there any PHP-MySQL full node implementation ? Development & Technical Discussion
I've started writing a full node a while ago: https://github.com/Bit-wasp/node-p…
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n/a | fbueller | December 30, 2015, 10:16:41 PM |
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Deterministic wallet compatibility matrix Wallet software
You're right; that information is lost. You can only know the parents fingerprin…
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n/a | fbueller | December 29, 2015, 04:27:11 PM |
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Full node with search function??? Bitcoin Technical Support
Github is a good place to discuss this stuff! An address based index was discuss…
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n/a | fbueller | December 29, 2015, 03:36:14 PM |
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Is this BIP65 sample script standard? Development & Technical Discussion
Again I'm pretty sure that the IF..ELSE shown in the BIP65 example is not the sa…
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n/a | fbueller | December 29, 2015, 03:21:30 PM |
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different signatures for different destinations Development & Technical Discussion
I think this was asked only a few weeks ago, and they didn't like my answer I'l…
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n/a | fbueller | December 25, 2015, 07:42:40 PM |
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getTransaction on Stale Chain Development & Technical Discussion
[1]: GetTransaction will return false, and will not set the hash/blockhash becau…
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n/a | fbueller | December 25, 2015, 03:16:18 PM |
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Is there any chance the fee will rise to replace block subsidy? Development & Technical Discussion
Even if there is no block space limitation in software, the bandwidth limit woul…
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n/a | fbueller | December 19, 2015, 06:27:18 PM |
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Is there any chance the fee will rise to replace block subsidy? Development & Technical Discussion
First, a fee market will develop. Bitcoin users have to compete (by the fee / kb…
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n/a | fbueller | December 18, 2015, 10:42:03 AM |
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Soft Fork to Increase the 21M Limit? Development & Technical Discussion
Quorum? There is no voting for a soft fork. Miners either upgrade their client o…
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n/a | fbueller | December 18, 2015, 10:33:50 AM |
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Nonstandard Transaction in Mainnet and Testnet Development & Technical Discussion
('Bare') Multi-signature used to be done through output scripts, but this was ch…
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n/a | fbueller | December 18, 2015, 10:29:21 AM |
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Nonstandard Transaction in Mainnet and Testnet Development & Technical Discussion
You can use P2SH for this.
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n/a | fbueller | December 17, 2015, 10:18:54 PM |
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Soft Fork to Increase the 21M Limit? Development & Technical Discussion
Miners do not have to back SegWit if only a softfork is required. Once a BIP is…
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n/a | fbueller | December 12, 2015, 02:06:32 PM |
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Possibility to see smart contracts in Bitcoin Development & Technical Discussion
say a decentralized uber service, that communicates via GPS to phone to determin…
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n/a | fbueller | December 11, 2015, 09:37:37 AM |
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Possibility to see smart contracts in Bitcoin Development & Technical Discussion
Was: Not possible. You can't call API's from bitcoin, HTTP status codes have no…
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n/a | fbueller | December 02, 2015, 09:51:38 AM |
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Keeping the addresses generated from deterministic wallet PubKey seed secret. Development & Technical Discussion
If you return only a public key, it's impossible to derive anything else in sequ…
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n/a | fbueller | December 11, 2015, 09:05:48 AM |
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Is there a way to find which block your bitcoin was mined from? Development & Technical Discussion
(1) Register on an API(2) Take an address you're interested in(3) Request all ut…
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n/a | fbueller | December 11, 2015, 09:02:26 AM |
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How To Convert A BTC Private Key (WIF) into another CryptoCurrency Private Key? Altcoin Discussion
Yes, it is. You need to reverse the base58check encoding to get the raw private…
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n/a | fbueller | December 11, 2015, 08:55:41 AM |
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Quantum computer? Development & Technical Discussion
Quantum computers will pose a threat to ECSDA. Whilst 256-bit ECC is comparable…
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n/a | fbueller | December 10, 2015, 09:15:05 PM |
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Quantum computer? Development & Technical Discussion
Bitcoin doesn't use encryption. Quantum doesn't doom all kinds of algorithms, ou…
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n/a | fbueller | December 11, 2015, 08:46:44 AM |
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Bicoin Core Node, why is it app based and not service based?? Development & Technical Discussion
AFAIK there is a setting in Core to launch it on startup in windows
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n/a | fbueller | December 07, 2015, 12:46:45 PM |
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How accept, send and verify payment by php via blockchain or xapo? Web Wallets
Sounds like you want a payment processor.
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n/a | fbueller | December 07, 2015, 11:37:10 AM |
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Does OP_CHECKSIG enforce the pubkey format? Development & Technical Discussion
I did some digging: the network does not enforce that public keys must be encode…
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n/a | fbueller | December 05, 2015, 01:28:25 PM |
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RAW TX with multisignature Development & Technical Discussion
Thanks, read this.But that article describes how to prepare RAW tx only with one…
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n/a | fbueller | December 05, 2015, 01:01:32 PM |
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Vanity Private Key Development & Technical Discussion
Base58 encoding is similar to the LUHN check. Given the first few digits, you ha…
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n/a | fbueller | December 05, 2015, 12:54:41 PM |
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Does OP_CHECKSIG enforce the pubkey format? Development & Technical Discussion
Quote 49310 83597 02850 19002 75777 67239 07649 57284 90777 215With OP-RETURN be…
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n/a | fbueller | December 05, 2015, 12:34:34 PM |
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Is it possible to guess a privkey? Development & Technical Discussion
It is possible. Just don't waste your time.
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n/a | fbueller | December 03, 2015, 09:57:15 AM |
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bitcoin-cli listtransactions not working for watch-only address Development & Technical Discussion
Someone may be able to advise better, but just adding the address won't make bit…
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n/a | fbueller | December 02, 2015, 12:59:53 AM |
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Is it possible to guess a privkey? Development & Technical Discussion
Quick Spin on the question to anyone who feels obliged to answer,If I created an…
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n/a | fbueller | December 02, 2015, 12:50:16 AM |
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Protection against botnet DDoS of invalid (signature or otherwise) transactions? Development & Technical Discussion
Quote By Johoe: Just like it is possible to DDOS the network from a botnet using…
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n/a | fbueller | December 01, 2015, 08:10:49 PM |
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Testnet reset question Development & Technical Discussion
The new chain is created by adding a new genesis block to the chains parameters.…
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n/a | fbueller | November 24, 2015, 12:20:10 PM |
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Possibility to see smart contracts in Bitcoin Development & Technical Discussion
Smart contracts have been in bitcoin since the beginning, depending on how you l…
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n/a | fbueller | November 24, 2015, 12:14:53 PM |
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Insight become unresponsive after few minutes/hours Altcoin Discussion
IIRC, there is a bug in bitcoind which results in 100% CPU usage when no peers a…
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n/a | fbueller | November 11, 2015, 09:28:07 AM |
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Lock multisig output to a set of addresses Development & Technical Discussion
A simple version is a script that allows funds to be redeemed by one of two part…
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n/a | fbueller | November 09, 2015, 06:55:12 PM |
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JS or PHP lib that allows separate HD public+private keys? (for offline wallet) Development & Technical Discussion
Bitcore or Bitcoinjs-lib works well for clientside stuff, and your server if you…
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n/a | fbueller | November 09, 2015, 06:34:47 PM |
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converting 52bit private keys to Base58 format Development & Technical Discussion
Note: they're not '52bit'. They're all 256-bit. Maybe you're talking about the l…
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n/a | fbueller | November 05, 2015, 10:41:25 AM |
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raw tx and change address Development & Technical Discussion
If you were doing:in: 50 coin input,fee: 0.0001 out: 10 39.9999 changeQuote...s…
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n/a | fbueller | November 05, 2015, 10:38:02 AM |
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The cost of Bitcoin attacks Development & Technical Discussion
Check the blockchain.info page on blockchain forks. You'll see one-block-deep fo…
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n/a | fbueller | October 27, 2015, 10:27:49 AM |
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Verify a signed message in PHP. Without downloading anything Project Development
Use this library and do it locally:https://github.com/Bit-Wasp/bitcoin-phpThat s…
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n/a | fbueller | October 21, 2015, 06:38:57 PM |
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Feature that should be added Development & Technical Discussion
Maybe some day (I'm not aware of any) but this looks good: http://bitcoin.stacke…
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n/a | fbueller | October 14, 2015, 11:29:01 AM |
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bitcoin core send a -1 confirmations transaction... Development & Technical Discussion
-1 means there was a conflicting transaction.Wait a long time. You see YOUR tran…
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n/a | fbueller | October 14, 2015, 08:41:30 AM |
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Feature that should be added Development & Technical Discussion
Re OP's feature request:It's already possible. You need to use the RPC. The down…
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n/a | fbueller | October 14, 2015, 08:33:00 AM |
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New Multisig feature request Development & Technical Discussion
OP, only you need to support this feature! Build it at the University. You can g…
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n/a | fbueller | October 13, 2015, 03:50:57 AM |
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incomming transaction understanding Development & Technical Discussion
(You can have many outputs as well, when creating a transaction)You'll come to k…
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n/a | fbueller | October 09, 2015, 05:30:28 PM |
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How to sync clocks to Bitcoin's timestamp? Development & Technical Discussion
A blocks median-time-past IS guaranteed to increase (there is a proposal to have…
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n/a | fbueller | October 04, 2015, 07:19:38 PM |
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Python Bitcoin Address to Hash 160 Hex - file Development & Technical Discussion
A general 'base58_decode` function should give you the hash. If you use base58_d…
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n/a | fbueller | October 04, 2015, 07:03:52 PM |
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Format for full file signatures Development & Technical Discussion
I want to point out that openssl will give you a signature for a file produced u…
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n/a | fbueller | September 26, 2015, 04:01:22 PM |
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Need brainwallet php script Development & Technical Discussion
JetRX: Depending on what passphrase you mean, try out https://github.com/Bit-Was…
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n/a | fbueller | August 13, 2015, 07:36:29 AM |
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Generating your own orphan blocks for the testnet? Development & Technical Discussion
Couldn't you emulate this with regtest mode?
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n/a | fbueller | August 09, 2015, 10:50:16 PM |
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Using pybitcointools to validate tx_valid.json test vectors Development & Technical Discussion
It looks like the verify_tx_input function is the smallest atomic function in th…
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n/a | fbueller | August 01, 2015, 07:06:29 AM |
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