All Questions
Tagged with op-cltv or checklocktimeverify
40 questions
1
vote
1
answer
36
views
Can the CLTV opcode be included in a Bitcoin wallet creation script?
I want to understand if it is possible to include an absolute locktime during the wallet generation process.
If I understand correctly, this would mean that the send function would be non-operational ...
- 21
2
votes
1
answer
121
views
Properly Import P2WSH Descriptors into a Watch-Only Wallet to Reflect All Balances and Transactions
I'm trying to import a Pay-to-Witness-Script-Hash (P2WSH) descriptor into my Bitcoin Core watch-only wallet using the importdescriptors command. My goal is to ensure that the wallet reflects all ...
- 21
2
votes
1
answer
60
views
How this transaction was included in the block if CLTV is much larger than a current block height?
So here's transaction in question: 04c2ad1e2ac3651e0cda0d2a3cc4b43434ad45de8330a526ab87aabb67587cc6
It's taproot script is:
OP_PUSHBYTES_32 ...
- 23
2
votes
1
answer
71
views
Non-witness P2SH spending using C++ libbitcoin
I am trying to spend an UTXO (non-witness P2SH) using libbitcoin. I've look at libbitcoin-system wiki documentation (https://github.com/libbitcoin/libbitcoin-system/wiki) but haven't found a solution ...
- 187
2
votes
2
answers
65
views
Can a spend before a timestamp condition be put on a Bitcoin UTXO?
How to make spending conditions of a UTXO in Bitcoin such that before a particular timestamp, say t, it can be spent only in one way and, after t, it can be spent only in another way.
- 41
0
votes
1
answer
111
views
What are the default timelocks in Lightning implementations today? How are they negotiated on channel opening?
There are two timelocks in Lightning that both channel counterparties must agree to if a channel is going to be opened between them. These are (from BOLT5) to_self_delay (a CSV relative timelock) ...
- 15.8k
2
votes
1
answer
121
views
Does the nSequence of the input that consumes the CLTV output have to be different from 0xffffffff?
Looking at the BIP65, it says that the CLTV will fail if the nSequence field of the txin is 0xffffffff. It seems logical to me since if the nSequence of all inputs are set to 0xffffffff, the value of ...
- 990
2
votes
1
answer
186
views
What is the relation between nLockTime and nSequence?
Here Antoine said the following:
This introduced absolute timelock capability through the nLockTime transaction field, which is disabled if all the transactions inputs have an nSequence that is ...
- 990
2
votes
2
answers
91
views
How does CLTV prevent spender from spending the output? [duplicate]
I have difficulty understanding how does CheckLockTimeVerify works. The BIP-65 which proposed CTLV says:
This BIP describes a new opcode (OP_CHECKLOCKTIMEVERIFY) for the
Bitcoin scripting system that ...
- 1,265
0
votes
1
answer
72
views
HTLC routing issues in custom LN plugin (c-lightning) on regtest network
I am working on a custom routing plugin for CLN on a regtest network. My goal is to compare its performance against the classical rebalancing plugin provided by the CLN community.
Now I am trying to ...
- 23
2
votes
1
answer
190
views
Create and spend P2WSH that locks coins with OP_CHECKLOCKTIMEVERIFY
I'm attempting to create a P2SWH address with a script that locks the coins for some time. And then I want to spend those coins from that address.
I've read a lot, some of the most relevant:
BIP173
...
- 21
2
votes
1
answer
1k
views
How to check OP_CHECKLOCKTIMEVERIFY?
I try to simply get into the OP_CHECKLOCKTIMEVERIFY opcode and test it. However I get the error
error: Locktime requirement not satisfied
no matter what unix- or blocktime I enter in my btcdeb. I ...
- 323
0
votes
0
answers
471
views
non-mandatory-script-verify-flag (Locktime requirement not satisfied) (code 64)
I'm attempting to redeem the following htlc ( the python script below ) via timeout, however the redemption tx errors out upon validation with the error below:
bitcoin.rpc.VerifyRejectedError: {'code'...
- 1,808
0
votes
1
answer
235
views
How to add an address to a CheckLockTimeValue (CLTV) transaction output using bitcore-lib (or any other js lib)
I am using bitcore-lib to create transactions. I can add an output with CLTV to the transaction but am unable to add an output address to it. This is my code (typescript/node):
const lockScript = ...
- 15
1
vote
1
answer
122
views
Using CLTV can I freeze some funds from a wallet, and make them available, in a single transaction?
For my scenarios, I want freeze some funds from my wallet for some given time/block and then make that amount spendable in a single transaction.
As I understand so far, I can do it using 2 ...
- 15
3
votes
1
answer
154
views
Clarification on execution of complex script with OP_CHECKLOCKTIMEVERIFY
I'm quoting this example of BIP65
BIP 65 has this bitcoin script code
IF
<now + 3 months> CHECKLOCKTIMEVERIFY DROP
<Lenny's pubkey> CHECKSIGVERIFY
1
ELSE
2
ENDIF
<...
- 1,388
1
vote
1
answer
509
views
How to make a transaction with locktime on testnet?
I tried to make transaction with nLocktime on bitcoin testnet. I am not able to broadcast it.
Can someone please help me to make a basic transaction with 1 input and 1 output, so that I can broadcast ...
- 35
5
votes
1
answer
299
views
How can I make transaction output time locked?
Is it possible to submit some coins to some address and make them spendable after some period of time?
Like I want submit 1btc to address 1Kc24m... and make that output to be spendable after january ...
- 609
3
votes
1
answer
260
views
Why CHECKLOCKTIMEVERIFY and CHECKSEQUENCEVERIFY opcodes have to be succeeded with DROP Opcode?
Opcodes that end in VERIFY generally do not leave anything on the stack. What's so different and the reasoning when designing these opcodes that CHECKLOCKTIMEVERIFY and CHECKSEQUENCEVERIFY opcodes ...
- 7,467
5
votes
1
answer
101
views
Is the bit encoding format for the graphic in BIP 68 implicitly little-endian?
CLTV (OP_CHECKLOCKTIMEVERIFY - absolute locktime) and CSV (OP_CHECKSEQUENCEVERIFY - relative locktime) utilize BIP 68. Is the locktime for those two operations implicitly encoded in little-endian ...
- 3,077
3
votes
1
answer
138
views
OP_CHECKLOCKTIMEVERIFY . Include / reject or will not included in block?
What happened if I translate to network transaction with the folowing redeem script:
[now + 3 months] CHECKLOCKTIMEVERIFY DROP
DUP HASH160 [Bob's Public Key Hash] EQUALVERIFY CHECKSIG
This tx will ...
- 173
1
vote
2
answers
160
views
BIP 113 - monotonic guarantee
BIP 113 mentions:
Existing consensus rules guarantee this value to monotonically advance, thereby removing the capability for miners to claim more transaction fees by lying about the timestamps of ...
- 1,074
2
votes
0
answers
376
views
Locktime requirement not satisfied when locktime set to 1 in p2sh
I've created the following script on testnet:
OP_IF
2 <pubkey1> <pubkey2> <pubkey3> 3
OP_CHECKMULTISIG
OP_ELSE
1 OP_CHECKSEQUENCEVERIFY
OP_DROP
<pubkey1&...
- 121
1
vote
1
answer
130
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 ...
- 11
1
vote
1
answer
246
views
ScriptSig in bip65 escrow example
In the bip65 there is an example how it can be used for escrow in combination with a multisig. See: https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki#Escrow
There it claims that the ...
- 294
7
votes
2
answers
671
views
CLTV vs nLockTime
What is the difference between nLockTime and CLTV? Bitcoin Wiki says:
When the CLTV opcode is called, it will cause the script to fail unless the nLockTime on the transaction is equal to or greater ...
- 181
3
votes
2
answers
268
views
How is the clock reset in the Complex Script Example?
At the end of Mastering Bitcoin Chapter 7, in the "Complex Script Example", they ask this question in regards to the script:
How do the partners "reset" the clock every 29 or 89 ...
- 133
2
votes
1
answer
177
views
What OP code can I use in the scripting system to make a smart contract that acts similar to a lottery
I am trying to make a smart contract that acts similar to a lottery or gambling game. Here is an example:
Alice and Bob send funds to a P2SH address. Bob is the lottery. The funds needs to be locked ...
- 179
6
votes
1
answer
800
views
Sequence number semantics
Reading the following BIPs: 68, 112, 125, I got a few questions about the sematics of sequence numbers. As far as I understood, in version 1 transactions, sequence numbers have the following meaning:
...
- 534
1
vote
2
answers
111
views
Is it safe to keep ONLY a time-locked tx?
What if the tx become incompatible with future versions of Bitcoin? In which cases it would just stop being compatible? If there is no compatibility guarantee, how can this be useful at all?
- 1,778
5
votes
2
answers
689
views
Are Micropayment channels still subject to malleability after BIP65?
After BIP 65, are simple, unidirectional, MPC still subject to transaction malleability?
More specifically:
Is the payee at risk because of malleability? If yes, how? (as far as I understood, the ...
- 691
5
votes
1
answer
1k
views
BIP 65 - how standard is it?
I read in this great thread that which BIP are standards is not always obvious.
What about BIP 65? To which extent is it standard?
Currently, all I know is that "Miners following the developers of ...
- 691
3
votes
2
answers
1k
views
Can you "undo" an nlockTime transaction by spending a single UTXO of it before lockTime's block happens?
Let's say I have a wallet X with money from 3 unspent outputs (UTXOs) A, B and C.
I make an nlocktime transaction to spend 2 of my 3 UTXOs (A & B) to wallet Y, 1 month in the future, sign it, and ...
- 1,784
3
votes
1
answer
111
views
Can I program OP_CHECKLOCKTIMEVERIFY to trigger based on external verifiable events?
Can OP_CHECKLOCKTIMEVERIFY and multi-sig be used to trigger a transaction based on external verifiable events?
Some potential uses I have in mind:
Death
College graduation of a child or grandchild
...
- 270
1
vote
1
answer
758
views
How do I use CHECKLOCKTIMEVERIFY to prevent a transaction being spent before 100 blocks?
I'm creating a Bitcoin based lottery application. An entry into the lottery is a transaction spending 1BTC.
If someone guesses some arbitrary value correctly, they can claim the entry and send this ...
- 13
2
votes
1
answer
745
views
Do transactions including CHECKLOCKTIMEVERIFY get mined immediately?
As I understand it, nLockTime prevents transactions from being included in a block, or even relayed. The problem is, if I pre-sign a transaction, and give it to someone, they have no guarantee that I ...
- 261
5
votes
1
answer
3k
views
Is my understanding of locktime correct?
I have been trying to understand locktimes and sequence numbers. I'm gradually building up a picture in my head based on code, code comments and info on the web. Rather than asking lots of questions, ...
- 1,713
12
votes
3
answers
3k
views
Why is OP_CHECKLOCKTIMEVERIFY disabled by maximum sequence number?
In the code for OP_CHECKLOCKTIMEVERIFY i noticed that if the txin sequence number is maxxed out then the script will fail to validate. I'm wondering what the point of this is? Why would anybody ever ...
- 1,713
3
votes
1
answer
353
views
How is time encoded (BIP65) in scripts?
BIP65 has several examples where OP_CHECKLOCKTIMEVERIFY interprets the time value underneath it in the stack, for example:
<expiry time> CHECKLOCKTIMEVERIFY DROP DUP HASH160 <pubKeyHash> ...
- 5,338
4
votes
1
answer
798
views
BIP65: "replacing ntimelock entirely"?
BIP65 discusses replacing the ntimelock field with the new CHECKLOCKTIMEVERIFY OP code:
As an aside, note how if the SignatureHash() algorithm could optionally cover part of the scriptSig the ...
- 5,338