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Nested ECC - A new hash algorithm with tremendous benefits? Development & Technical Discussion
A new hash algorithm?All right, this may be more cryptography than Bitcoin, but…
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n/a | BTCW | April 14, 2024, 06:15:32 PM |
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World's fastest and simplest block parser for those who (only) need all HASH160 Development & Technical Discussion
For those interested in mempool analysis (I am), I created a new "bash pipe mons…
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n/a | BTCW | March 05, 2024, 03:23:26 PM |
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Would P2WPKH v1/bech32m addressee be legal (and usable and spendable)? Bitcoin Technical Support
Oh, I just realized you can test beyond v1. Said and done:Code:bitcoinutils.bech…
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n/a | BTCW | March 01, 2024, 07:14:45 PM |
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Would P2WPKH v1/bech32m addressee be legal (and usable and spendable)? Bitcoin Technical Support
Field-test results:Using bitcointools and hashlib in Python. First, generate a n…
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n/a | BTCW | March 01, 2024, 09:35:19 AM |
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Would P2WPKH v1/bech32m addressee be legal (and usable and spendable)? Bitcoin Technical Support
We have a public key. We have its RIPEMD(SHA256(pubkey)) hash, a.k.a. HASH160We…
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n/a | BTCW | February 29, 2024, 07:48:29 PM |
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Skaffa crypto Skandinavisk
I don't speak a word Swedish (?), but as I am totally bribable, and I took 1000…
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n/a | BTCW | February 23, 2024, 07:18:16 PM |
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120 USD to transfer 25 cents - Taproot genius transaction Bitcoin Discussion
https://ordiscan.com/inscription/56605119Because that person just paid for a pie…
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n/a | BTCW | January 20, 2024, 04:47:53 PM |
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120 USD to transfer 25 cents - Taproot genius transaction Bitcoin Discussion
This recent transaction stands out a bit...0.00288744 BTC (120.19 USD) to transf…
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n/a | BTCW | January 20, 2024, 04:36:43 PM |
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Need help reversing bitcoinutils "tagged_hash" to generate Taproot addresses Development & Technical Discussion
[Addition, the problem was solved down here]Let's begin with this private keyCod…
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n/a | BTCW | January 15, 2024, 04:33:16 PM |
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Need help reversing bitcoinutils "tagged_hash" to generate Taproot addresses Development & Technical Discussion
Think I nailed it!I don't think such concrete Python code has been published els…
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n/a | BTCW | January 17, 2024, 11:14:38 AM |
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Need help reversing bitcoinutils "tagged_hash" to generate Taproot addresses Development & Technical Discussion
Code:hashlib.sha256(bytes.fromhex('e80fe1639c9ca050e3af1b39c143c63e429cbceb15d94…
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n/a | BTCW | January 16, 2024, 11:41:35 AM |
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Need help reversing bitcoinutils "tagged_hash" to generate Taproot addresses Development & Technical Discussion
Code:A tagged hash is: SHA256( SHA256("TapTweak") || …
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n/a | BTCW | January 16, 2024, 08:08:45 AM |
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Need help reversing bitcoinutils "tagged_hash" to generate Taproot addresses Development & Technical Discussion
Have you tried reading the BIP? https://github.com/bitcoin/bips/blob/master/bip-…
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n/a | BTCW | January 16, 2024, 04:33:29 AM |
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the fastest possible way to mass-generate addresses in Python Development & Technical Discussion
I was looking only for public key generation partHere's a simplified script that…
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n/a | BTCW | January 14, 2024, 11:51:18 AM |
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Tool or method for finding public key of Bitcoin address Development & Technical Discussion
Hi guys. Just wandering if their is a tool, script or method for finding the un…
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n/a | BTCW | January 11, 2024, 08:10:46 AM |
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How to redeem a "dumb script" native P2WPKH? (Nested P2SH-P2WPKH went well) Development & Technical Discussion
No sigScript allowed when spending... hm. How do I create a witness program for…
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n/a | BTCW | January 09, 2024, 12:49:54 PM |
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How to redeem a "dumb script" native P2WPKH? (Nested P2SH-P2WPKH went well) Development & Technical Discussion
I fooled around a bit with "dumb scripts" like so:Script("OP_DROP", "OP_1") is d…
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n/a | BTCW | January 07, 2024, 11:54:18 AM |
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At least 14(!) unique public addresses from one single seed (0 derivation paths) Development & Technical Discussion
Do you agree that a not-uncommon Bitcoin discussion goes along the lines:"Rememb…
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n/a | BTCW | December 26, 2023, 06:20:08 PM |
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Is there a list of public keys Development & Technical Discussion
Fire up Electrum (a portable executable/binary is good enough, regardless of OS)…
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n/a | BTCW | December 23, 2023, 04:05:16 PM |
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In theory,THE most unsafe HD Wallet - [BIP32, BIP39, BIP44, BIP84] - am I close? Development & Technical Discussion
This is interesting. Remember a decade ago and the fuck-up with brain wallets?Pe…
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n/a | BTCW | December 22, 2023, 09:41:05 PM |
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In theory,THE most unsafe HD Wallet - [BIP32, BIP39, BIP44, BIP84] - am I close? Development & Technical Discussion
Simplifying further with a one-liner (added "x01" to the 32-byte/64-character he…
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n/a | BTCW | December 22, 2023, 09:00:24 AM |
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In theory,THE most unsafe HD Wallet - [BIP32, BIP39, BIP44, BIP84] - am I close? Development & Technical Discussion
My main point is that it doesn't matter how many safety stops you have along the…
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n/a | BTCW | December 22, 2023, 08:12:47 AM |
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In theory,THE most unsafe HD Wallet - [BIP32, BIP39, BIP44, BIP84] - am I close? Development & Technical Discussion
DISCLAIMER: Consider this a theoretical exercise in producing the worst imaginab…
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n/a | BTCW | December 21, 2023, 06:15:08 PM |
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World's fastest and simplest block parser for those who (only) need all HASH160 Development & Technical Discussion
For all .dat files in one go, start with "cat blk* |" insteadI often use sort on…
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n/a | BTCW | September 25, 2023, 05:05:45 PM |
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World's fastest and simplest block parser for those who (only) need all HASH160 Development & Technical Discussion
Minor additionsThese are the regex I've fiddled with for the three most common a…
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n/a | BTCW | September 08, 2023, 08:51:46 AM |
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World's fastest and simplest block parser for those who (only) need all HASH160 Development & Technical Discussion
Assuming you're in the terminal and the ~/blocks folder, just:Code:cat blk00000.…
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n/a | BTCW | September 06, 2023, 08:28:55 AM |
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World's fastest and simplest block parser for those who (only) need all HASH160 Development & Technical Discussion
And we want all hash 160 strings ever used for what?Ah, sorry. So-called Brainwa…
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n/a | BTCW | September 05, 2023, 05:35:27 PM |
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World's fastest and simplest block parser for those who (only) need all HASH160 Development & Technical Discussion
And we want all hash 160 strings ever used for what?Ah, sorry. So-called Brainwa…
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n/a | BTCW | September 05, 2023, 03:48:42 PM |
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World's fastest and simplest block parser for those who (only) need all HASH160 Development & Technical Discussion
The question never really dies; since Brainflayer in 2016, the dream seems to li…
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n/a | BTCW | September 05, 2023, 08:45:59 AM |
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P2PK - send to AND spend from a public address - will it work in 2023? Development & Technical Discussion
Dang. Finder keepers - check out this tx on testnet (confirmation was FAST)https…
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n/a | BTCW | September 04, 2023, 07:16:36 PM |
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P2PK - send to AND spend from a public address - will it work in 2023? Development & Technical Discussion
1. How would I send to the public key (NOT the public address) - in practice?By…
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n/a | BTCW | September 04, 2023, 10:14:48 AM |
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P2PK - send to AND spend from a public address - will it work in 2023? Development & Technical Discussion
Wallets might not support uncompressed public keys, but you can always send and…
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n/a | BTCW | September 04, 2023, 09:10:17 AM |
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P2PK - send to AND spend from a public address - will it work in 2023? Development & Technical Discussion
I don't think an introduction to P2PK is necessary in this forum. Briefly, it wa…
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n/a | BTCW | September 04, 2023, 07:16:34 AM |
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Prime number Bitcoin keypairs - How and why Development & Technical Discussion
Regardless of my OS, good luck "rewinding"iterated until reaching a prime, to gi…
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n/a | BTCW | March 22, 2021, 05:50:32 PM |
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Prime number Bitcoin keypairs - How and why Development & Technical Discussion
So. if private key is prime, so address would be prime too?Nope, there is no cau…
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n/a | BTCW | March 21, 2021, 05:30:13 PM |
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Prime number Bitcoin keypairs - How and why Development & Technical Discussion
How about a field test?I just sent 1 tBTC toCode:Public Address, Legacy, compres…
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n/a | BTCW | March 21, 2021, 04:39:30 PM |
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Prime number Bitcoin keypairs - How and why Development & Technical Discussion
Thanks for the feedback so far, all of you.I would however still argue that sinc…
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n/a | BTCW | March 20, 2021, 07:40:49 PM |
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Prime number Bitcoin keypairs - How and why Development & Technical Discussion
HOWFirst, consider this Bitcoin key pair:Code:Private key compressed (wif):L3ACA…
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n/a | BTCW | March 19, 2021, 08:30:51 PM |
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Pulp Fiction and multiple OP_RETURN, valid tx on testnet Bitcoin Technical Support
QuoteIf you have another trick for mainnet, I'm all ears! One that doesn't rely…
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n/a | BTCW | September 14, 2020, 02:29:48 AM |
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Pulp Fiction and multiple OP_RETURN, valid tx on testnet Bitcoin Technical Support
How Jules ended up on the blockchainLike many others, I've experimented with inc…
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n/a | BTCW | September 13, 2020, 06:36:17 PM |
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Fatal Bitcoin Core 0.20.1 performance Development & Technical Discussion
Feel your pain, man. I'm trying to import 2^256 private keys, and it takes blood…
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n/a | BTCW | September 11, 2020, 05:05:57 PM |
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Shortest possible raw transaction (below 85 bytes possible)? Development & Technical Discussion
Another try:locking script ="OP_11" = "5b" --> 2NBfBS5XCqbBL1D8gLCFG15S5gPE4LEWB…
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n/a | BTCW | August 31, 2020, 07:03:12 PM |
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Shortest possible raw transaction (below 85 bytes possible)? Development & Technical Discussion
To begin with: are there 82-byte transactions from say 2017 and until now? Or is…
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n/a | BTCW | August 31, 2020, 04:20:03 AM |
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Shortest possible raw transaction (below 85 bytes possible)? Development & Technical Discussion
Please don't. Using transactions below the standard size limit will interfere wi…
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n/a | BTCW | August 31, 2020, 04:16:07 AM |
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Shortest possible raw transaction (below 85 bytes possible)? Development & Technical Discussion
The smallest transaction that can be relayed is 82 bytes. There is a hard minimu…
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n/a | BTCW | August 30, 2020, 05:57:40 PM |
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Shortest possible raw transaction (below 85 bytes possible)? Development & Technical Discussion
I have experimented with creating the shortest possible raw transaction, which h…
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n/a | BTCW | August 30, 2020, 12:01:35 PM |
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Is this P2SH _obviously_ vulnerable? [0.1 tBTC stake] Development & Technical Discussion
If the vast majority of the mainnet nodes think that sending to a non-standard s…
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n/a | BTCW | August 29, 2020, 04:49:53 AM |
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Is this P2SH _obviously_ vulnerable? [0.1 tBTC stake] Development & Technical Discussion
"Everybody" is talking about Bitcoin privacy and anonymity, tumbling, washing, a…
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n/a | BTCW | August 28, 2020, 06:14:46 AM |
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Private key hack new method Development & Technical Discussion
If you or anyone else could calculate private keys from public keys, you would a…
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n/a | BTCW | August 27, 2020, 06:24:27 PM |
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Is this P2SH _obviously_ vulnerable? [0.1 tBTC stake] Development & Technical Discussion
Cool! Today I learned an UTXO does not necessarily belong to regular addresses,…
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n/a | BTCW | August 27, 2020, 05:43:41 PM |
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Is this P2SH _obviously_ vulnerable? [0.1 tBTC stake] Development & Technical Discussion
There's a simpler example of this quite some time ago[1]. The example has SHA256…
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n/a | BTCW | August 26, 2020, 05:17:00 PM |
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Is this P2SH _obviously_ vulnerable? [0.1 tBTC stake] Development & Technical Discussion
In other words, I tried to disguise an any-one-can-spend address by having it re…
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n/a | BTCW | August 25, 2020, 12:50:47 PM |
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Is this P2SH _obviously_ vulnerable? [0.1 tBTC stake] Development & Technical Discussion
Concluding remarksHere is a brief explanation of how and why the posted addresse…
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n/a | BTCW | August 23, 2020, 05:21:08 PM |
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Is this P2SH _obviously_ vulnerable? [0.1 tBTC stake] Development & Technical Discussion
A vulnerable P2SH address - but how vulnerable?I have been fooling around some m…
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n/a | BTCW | August 21, 2020, 07:44:53 PM |
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Is this P2SH _obviously_ vulnerable? [0.1 tBTC AND 0.001 BTC stake] Development & Technical Discussion
OK, OK - I hear you! Loud and clear. Testnet coins have per definition no value.…
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n/a | BTCW | August 22, 2020, 05:00:33 PM |
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List of all Bitcoin addresses ever used Project Development
UpdatesSorting a list that doesn't fit in the server's RAM is very slow. Therefo…
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n/a | BTCW | August 19, 2020, 06:03:18 PM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
Alright, so show me your kung fu BrewMaster!I threw together a new locking scrip…
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n/a | BTCW | August 06, 2020, 06:49:14 AM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
Challenge 2 - we have a winner! Wowzers!! Looks like someone cracked my challeng…
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n/a | BTCW | August 04, 2020, 08:40:20 PM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
1) Yeah, I know about standardness. I "only" have access to Bitcoin Core, Electr…
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n/a | BTCW | August 04, 2020, 02:05:06 PM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
1) Correct me if I'm wrong but unlocking scripts must, to the best of knowledge,…
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n/a | BTCW | August 04, 2020, 09:32:29 AM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
...This isn't correct. I designed the locking script so it requires exactly two…
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n/a | BTCW | August 04, 2020, 09:14:22 AM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
Long story short, I created this not-very-standard P2SH public address: 2NA4ZpHb…
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n/a | BTCW | August 03, 2020, 06:12:18 AM |
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A breakable P2SH address - Bitcoin testnet inside [updated] Development & Technical Discussion
A new challengeYou asked for it, and you will have it. This time around:Includes…
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n/a | BTCW | August 04, 2020, 08:04:33 AM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
A script can be anything.Anything is quite a broad thing, since it includes ever…
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n/a | BTCW | August 04, 2020, 07:54:51 AM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
I promise to be more pedagogical in coming write-ups (if there will be any). In…
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n/a | BTCW | August 04, 2020, 04:44:51 AM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
you found one case of transaction malleability. it doesn't matter what you plac…
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n/a | BTCW | August 04, 2020, 04:37:56 AM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
I am not sure what you tried to accomplish with this "breakable P2SH address" c…
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n/a | BTCW | August 04, 2020, 04:19:32 AM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
It is easier than you think to break it. And someone just did:i don't know if yo…
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n/a | BTCW | August 04, 2020, 04:13:59 AM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
Alright, let's talk about Bitcoin scripts and its opcodes.A transaction is (part…
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n/a | BTCW | August 03, 2020, 05:33:58 PM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
Show me you can break it and sweep the coins!It's NOT of those "try and brutefor…
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n/a | BTCW | August 03, 2020, 12:58:16 PM |
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A breakable P2SH address - Bitcoin testnet inside Development & Technical Discussion
but tBTC has no price... meaning to waste timeWho says this exact same setup doe…
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n/a | BTCW | August 03, 2020, 07:59:08 AM |
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Can Bech32 be P2SH? [Bounty inside!] Development & Technical Discussion
I see you were smart and marked it "RBF = False" I noticed your transaction was…
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n/a | BTCW | August 01, 2020, 04:05:24 PM |
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Can Bech32 be P2SH? [Bounty inside!] Development & Technical Discussion
Had to replicate this on the Bitcoin mainnet - and it worked!1. Created a "stupi…
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n/a | BTCW | August 01, 2020, 07:14:01 AM |
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Can Bech32 be P2SH? [Bounty inside!] Development & Technical Discussion
And for the record, I don't think the Bitcoin wiki (linked before) should read "…
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n/a | BTCW | August 01, 2020, 04:39:23 AM |
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Can Bech32 be P2SH? [Bounty inside!] Development & Technical Discussion
And yes please, I would love a demonstration of an anyone-can-spend Bech32 addre…
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n/a | BTCW | July 31, 2020, 12:15:28 PM |
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Can Bech32 be P2SH? [Bounty inside!] Development & Technical Discussion
I would like to challenge this.Well I'm telling you you are wrong.From BIP 141As…
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n/a | BTCW | July 31, 2020, 11:26:35 AM |
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Can Bech32 be P2SH? [Bounty inside!] Development & Technical Discussion
[...]BTW your bounty is actually completely incorrectly made and is actually uns…
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n/a | BTCW | July 31, 2020, 06:41:05 AM |
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Can Bech32 be P2SH? Development & Technical Discussion
EDIT: UPDATEDLet's make it a bounty! Of course!I created this stupid script "OP_…
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n/a | BTCW | July 30, 2020, 07:50:37 PM |
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Can Bech32 be P2SH? [Bounty inside!] Development & Technical Discussion
Still, no conclusive answer to the core question: Can a Bech32 be a P2SH-address…
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n/a | BTCW | July 31, 2020, 06:26:57 AM |
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Can Bech32 be P2SH? [Bounty inside!] Development & Technical Discussion
Some backgroundI have fooled around a bit with "stupid" scripts and their corres…
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n/a | BTCW | July 30, 2020, 07:24:10 PM |
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Custom P2SH redeem script - any wallet software that can handle it? Development & Technical Discussion
Found another interesting example. I call it "the nothing P2SH address". Because…
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n/a | BTCW | July 26, 2020, 05:11:08 PM |
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Custom P2SH redeem script - any wallet software that can handle it? Development & Technical Discussion
I find it a little funny you can easily create a transaction here, and then late…
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n/a | BTCW | July 14, 2020, 06:01:59 AM |
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Custom P2SH redeem script - any wallet software that can handle it? Development & Technical Discussion
If it really is the case that importmulti for P2SH with scriptPubKey and redeems…
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n/a | BTCW | July 13, 2020, 01:29:23 PM |
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Custom P2SH redeem script - any wallet software that can handle it? Development & Technical Discussion
Code:src/bitcoin-cli -regtest importmulti '[{"watchonly":true,"timestamp":"now",…
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n/a | BTCW | July 13, 2020, 10:59:41 AM |
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Generate P2WSH - redeemScript does not correspond to witnessScript Bitcoin Technical Support
Yes I saw the PR!I thought that another example should be interest to understand…
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n/a | BTCW | July 13, 2020, 10:39:18 AM |
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Custom P2SH redeem script - any wallet software that can handle it? Development & Technical Discussion
Feels like a stupid JSON formatting thing; please help!It isn't.Bitcoin Core onl…
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n/a | BTCW | July 13, 2020, 09:56:42 AM |
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Custom P2SH redeem script - any wallet software that can handle it? Development & Technical Discussion
Result (written as part of a raw transaction): a82055c53f5d490297900cefa825d0c8e…
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n/a | BTCW | July 13, 2020, 06:24:03 AM |
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Custom P2SH redeem script - any wallet software that can handle it? Development & Technical Discussion
Damn, this is frustrating! The manual for Bitcoin Core says you can do it (impor…
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n/a | BTCW | July 13, 2020, 05:03:42 AM |
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Custom P2SH redeem script - any wallet software that can handle it? Development & Technical Discussion
It is very easy to create valid, custom scriptSig/scriptPubkey-combinations, cal…
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n/a | BTCW | July 12, 2020, 01:31:58 PM |
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Why Bitcoin smart contracts are not developed? Bitcoin Discussion
Bitcoin can have "DIY smart contracts" (no code, no forks, no extra software) as…
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n/a | BTCW | July 11, 2020, 07:45:54 PM |
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From private key to address [Facing problem] Development & Technical Discussion
it really isn't as tough as you think. it is like saying computing SHA256 is tou…
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n/a | BTCW | July 08, 2020, 02:04:52 PM |
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From private key to address [Facing problem] Development & Technical Discussion
Here is a quick and dirty solution in Python3 (command line, not a saved script)…
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n/a | BTCW | July 07, 2020, 03:55:23 PM |
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All used addresses Development & Technical Discussion
Try this. I use it all the time.https://github.com/alecalve/python-bitcoin-block…
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n/a | BTCW | July 07, 2020, 09:20:55 PM |
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Why does vout sometimes not have address? Development & Technical Discussion
You need a better explorer. Check this out, you can view each transaction (inclu…
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n/a | BTCW | July 07, 2020, 09:18:33 PM |
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From private key to address [Facing problem] Development & Technical Discussion
You have to use elliptic curve multiplication to multiply the private key by the…
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n/a | BTCW | July 07, 2020, 06:16:01 PM |
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Compile and run a "rude" full node - tips wanted! Development & Technical Discussion
Looking at the source code for Bitcoin core, my first changes will be to modify…
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n/a | BTCW | July 07, 2020, 02:21:01 PM |
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From private key to address [Facing problem] Development & Technical Discussion
I wrote a new python script for this (for my friends at https://btcleak.com/ - t…
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n/a | BTCW | July 07, 2020, 12:41:59 PM |
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Compile and run a "rude" full node - tips wanted! Development & Technical Discussion
Addition:MAX_OUTBOUND_FULL_RELAY_CONNECTIONS and MAX_ADDNODE_CONNECTIONS - found…
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n/a | BTCW | July 07, 2020, 12:07:33 PM |
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Compile and run a "rude" full node - tips wanted! Development & Technical Discussion
I want to run a "rude" Bitcoin full node. As an experiment. Will build from sour…
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n/a | BTCW | July 07, 2020, 10:34:12 AM |
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Catastrophic P2SH public addresses? Development & Technical Discussion
This script ("0x4c01014c010287" in hexadecimal) FWIW this script is non-standard…
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n/a | BTCW | June 25, 2020, 01:05:15 PM |
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