Questions tagged [p2pkh]
Pay-to-PubKey-Hash is the standard format for making payments on the Bitcoin network.
44
questions
0
votes
1answer
20 views
Why can't P2PKH's scriptPubKey be shortened to only OP_CHECKSIG?
For P2PKH, the scripPubKey is OP_DUP OP_HASH160 <pubKeyHash> OP_EQUALVERIFY OP_CHECKSIG. Why can't it check the signature only? Why can't it be shortened to just one opcode — OP_CHECKSIG?
Why ...
0
votes
1answer
76 views
How to generate legacy receiving address in Bitcoin core 0.19.x.x
I must have missed the memo. I see Bitcoin Core 19.1.0.1 defaults to generating Bech32 receive addresses (prefixed with "bc1"), and offers a checkmark to generate P2SH addresses instead (prefixed ...
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vote
1answer
44 views
Why is 'p2pkh:' prepended at the beginning of private key addresses in electrum?
I recently started a Blockchain course and came across the electrum software. While going through the list of wallet addresses and associated private keys I found that 'p2pkh' is placed at the start ...
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0answers
42 views
How can I check my transaction signature is correct?
I have tried recreating the exact transaction from "Appendix B: Funding Transaction Test Vectors" from BOLT 3 from the Lightning RFCs. My transaction looks exactly the same when parsed, except my ...
0
votes
1answer
63 views
Bitcoin Signature Verification
I am trying to implement the OP_CHECKSIG opcode of Bitcoin and verify whether a signature is valid or not. I have the signature that I recieve from the transaction data and the public key(the hex ...
2
votes
1answer
181 views
How does OP_CHECKSIG work
Hi I am learning bitcoin and learning how scripting works and how to use P2PKH. I was wondering how does OP_CHECKSIG work. I want to understand what is the data that the private key signs to create ...
0
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0answers
23 views
Curiosity on P2PKH and P2PK [duplicate]
I have some question on the P2PKH and P2PK they are two methods for locking the output, is a correct definition?
Why the P2Pkh was introduced inside the bitcoin?
Also, the P2PKH is identified with the ...
0
votes
1answer
111 views
How do I extract the address from a scriptPubKey?
I am creating a block parser and just learned about Scripts in Bitcoin yesterday which is kind of confusing so far. I want to extract the addresses involved in each transaction. Right now, I am able ...
2
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0answers
28 views
Script and DER in P2PKH
Im trying to figure out the script and DER
In P2PKH, the "first part (scriptsig)" push in stack (<sig><pubK>) because is it DER?
Instead the "second part (scriptPubKey)" you can map the ...
0
votes
1answer
120 views
P2SH to LTC address with M
Are there anyone know how to convert P2SH address (like 34A5PyCvPJKYtHmj9jmKhGzBBwpGuAkZog) to MANDhrctLRAygo3dFckfWvEaWeQizSwWNK?
I tried to decode with Base58Check, then removed 05 and added 032, ...
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2answers
111 views
If I was developing a Bitcoin wallet, should I support both legacy and compatibility addresses?
To receive funds, I was thinking of giving a user the option of displaying two QR codes:
Legacy - p2phk e.g. 1AKDDsfTh8uY4X3ppy1m7jw1fVMBSMkzjP
Compatibility - p2sh(p2wpkh) e.g. ...
0
votes
2answers
212 views
how to get the sender's address in bitcoinj
I'm trying to modify the simple wallettemplate to get the sender's address in the transaction list. However since TransactionInput.getFromAddress() doesn't exist now and getConnectedOutput()....
0
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1answer
514 views
convert “M” address to “3” address LTC
currently im facing with 1 issue that i need to convert all my litecoin address in my fullnode to legacy address (prefix with "M"). Im know that we have a tool https://litecoin-project.github.io/p2sh-...
0
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1answer
198 views
Is P2SH-wrapped P2PKH possible?
There is a known form of address that called P2SH-wrapped SegWit, wrapping SegWit address as Base58 (P2SH) address.
Thinking about such address type, I come up with the question: Is P2SH-wrapped P2PKH ...
4
votes
1answer
499 views
How is Public Key extracted from (message, digital signature, address)
I'm under the impression that a public key is revealed when you sign a message.
Given these 3 inputs.
P2PKH Address, Digital Signature, Message.
Is the public key exposed?
If so, how do you extract ...
0
votes
1answer
98 views
Struggling to successfully broadcast a p2pkh transaction
I've been experimenting with sending bitcoin transactions with python for the past week. I successfully was able to send p2wpkh->ALL address types, p2sh-p2wpkh->ALL address types.
What I am ...
2
votes
1answer
168 views
scriptcode, scriptsig, pubkeyscript confusion
I've been banging my head on a desk for a few days trying to understand the segwit protocol properly.
Another roadblock has thrown me off-guard and I am struggling to grasp the concept of "scriptCode:...
0
votes
2answers
286 views
Checking signature only vs. P2PKH
It is clear to me why it's potentially unsafe to only use a check on == in scriptPubKey. For one, not verifying a signature in the redeem script means that someone could impersonate the redeemer. From ...
1
vote
1answer
111 views
P2PKH - Sharing a wallet address does not reveal my pub key?
Is it technically correct to say that if I share my address with the network, nobody has access to my pubkey still?
But if I share a valid signature to a P2PKH UTXO, someone can derive my pubkey and ...
0
votes
1answer
170 views
Access funds on legacy address related to segwit address from which I have private key
The situation
Hello. Our company running BTC pool. We've been mining BTC for a while and used segwit address 32Z3eXSPgxcHj2fnQy8d6dg66eVtZfxrBM as pool adress.
But when we finally found a first ...
1
vote
1answer
145 views
Can I prove a double spend attempt with a signed tx with same input?
I am designing an cross-chain atomic swap in a custom blockchain - Protoblock. I think it can be done as long as Protoblock knows how to parse p2pkh bitcoin transactions. The critical part is being ...
0
votes
1answer
492 views
bitcoin public key vs public key hash vs. pub key [duplicate]
I am not talking about the privacy related concerns just the security aspect and the ability for someone to 'break my private key'.
The addresses that my wallet generates are p2pkh addresses. If i ...
2
votes
2answers
938 views
Bitcoin - Technical difference between P2PKH and P2SH address generation?
I was convinced that the only difference between the generation of addresses starting with '1' and '3' was simply changing the prefix added to the digest from 0x00 to 0x05 after the ripemd160 part.
...
4
votes
2answers
626 views
How did pay-to-pubkey hash come about? What is its history?
We know that early blocks all used pay-to-pubkey (p2pk) and at some point, we mostly switched to pay-to-pubkey-hash (p2pkh). What is the history behind this? Who made the changes and when did p2pkh ...
2
votes
2answers
2k views
Is it possible to convert an address from p2pkh to p2sh?
Is it possible to convert a p2pkh address to a p2sh address?
Also, will the balance of the p2pkh address carry over to the p2sh address?
1
vote
2answers
57 views
When you create a multisig address from existing addresses, do the funds move there?
If you have three addresses, lets say A, B and C and they each have 1 BTC. When you create a multisig address out of the three addresses, will it have a balance of 3 BTC or do you have to send the ...
4
votes
4answers
350 views
Why bother checking both public key and signature in P2PKH transactions?
In a P2PKH pubkey script, first, the public key provided by the intended spender is verified to be correct and then this key is used to verify the spender's signature.
I wonder why just verifying the ...
9
votes
3answers
2k views
Why is P2PKH used instead of the simpler P2PK?
If elliptic curve cryptography is secure enough to be able to give away a public key without fear of anyone being able to calculate our private key from it, what's the reason for hashing our public ...
0
votes
2answers
148 views
Why is this script invalid, and how can I generate valid public key/digital signature pairs?
Why does the default P2PKH transaction at http://bitcoin-script-debugger.visvirial.com/ return NULL rather than true? I haven't tried to swallow the gory details of OP_CHECKSIG yet, but everything ...
0
votes
1answer
89 views
P2SH in Hardware wallet?
I am designing a hardware wallet and the software that will work with it.
I plan to provide P2PKH transactions support in the software for hardware wallet to sign.
Is it mandatory to support P2SH ...
1
vote
1answer
601 views
Convert P2SH to P2PKH
I'm using btcrecover to recover a Ledger BIP39 backup seed that I wrote down but seems to be wrong. The tool only accepts P2PKH addresses and my account was created very recently in this kind of ...
4
votes
4answers
341 views
Why doesn't address contain a full scriptPubKey?
This is a general question, but let's suppose a P2PKH transaction. P2PKH address starts with "1" and the sender incorporates it into the scriptPubKey as:
OP_DUP OP_HASH160 <PublicKeyHash> ...
8
votes
2answers
4k views
Bech32 conversion to legacy P2PKH?
Electrum now generates Bech32 addresses for SegWit wallets.
Example: bc1qnntcclssmtuvfw2te7q49lzvw67cfvpzxger4j
Pubkey: 023f1b3421c6ae0c1758834d40806c2418194b507be261fa343a0636653f3ec75b
If I ...
3
votes
3answers
711 views
How it is possible to validate existing Pay to Public Key Hash transaction without public key?
These are my understanding or assumptions.
Sign a document requires secret key and message only as below
SignDocument(secret key, message) => signature
And verification of signature requires ...
2
votes
1answer
126 views
How can blockchain.info show the output address of a transaction when the output address has never been used in any other transaction?
I've stumbled across a transition on blockchain.info where the output address was displayed even though the output address had never been used in any other transaction.
How can blockchain.info know ...
0
votes
1answer
388 views
Bitcoin P2PKH transaction - two questions
Trying to learn the basics of the bitcoin's standard transaction script here. For a transaction where Alice has sent coins to Bob, who is now trying to redeem them, we have the concatenated scriptSig ...
0
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3answers
66 views
OP_HASH160 pops the public key from stack after hashing it?
This guide https://bitcoin.org/en/developer-guide#p2pkh-script-validation mentions
"The operation executed next, OP_HASH160, pushes onto the stack a hash of the data currently on top of it—in this ...
2
votes
1answer
244 views
How does Bitcoin prevent replay-attacks? [duplicate]
How does Bitcoin prevent replay-attacks for P2PKH transactions?
As far as I understand, when a transaction is made to pay bitcoins to another account, the P2PKH script is used.
scriptPubKey: OP_DUP ...
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vote
1answer
74 views
Inconsistency in pubkey hashes usage explanation
I am learning about blockchain and reading a lot of stuff, but one question bothers me for last few days.
So in docs they say that P2PKH transactions use hash of the public key instead of a public key ...
4
votes
1answer
676 views
Trying to understand Pay-to-Public-Key-Hash
I am new to bitcoin and I am trying to understand Pay-to-Public-Key-Hash (P2PKH) from the book: Mastering Bitcoin: Unlocking Digital Cryptocurrencies (p. 127). I understand that digital keys (which ...
15
votes
2answers
5k views
Why do you use Bitcoin addresses instead of public keys?
Why do you hash the public key twice? Are there security benefits to abstracting away from the public key? Is it because the address can represent multiple things? I'm missing something.
Could you ...
5
votes
1answer
807 views
How big is the input of a P2PKH transaction?
How many bytes does a P2PKH input have? I'm finding a few different numbers:
Why does the default miner implementation use pay-to-pubkey? states:
push + sig + push + key = 1 + 72 + 1 + 61 = 139
...
4
votes
1answer
495 views
What is the composition of transaction types in current blocks?
What types of transactions do we see in blocks today and how much of the blockspace do they occupy?
I.e. does someone have data how much of the blocks are Pay to PubKey Hash, Pay to PubKey, Pay to ...
60
votes
3answers
68k views
How to calculate transaction size before sending (Legacy Non-Segwit - P2PKH/P2SH)
I know that I pay the transaction fee per kB, so how can I calculate how large the transaction will be before I send it via the RPC api. I run a site using bitcoins, and I cannot let the user's ...
