Questions tagged [locktime]
Defines the block number or timestamp until this transaction is locked, or 0 if the transaction is always locked.
1
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1answer
26 views
Create a transaction spendable in a specific block height
I am new in Bitcoin and I try to create an address in Bitcoind and send a transaction that the amount will be spendable in a specific height of the blockchain.
Here is what I have done:
privateKey = ...
2
votes
1answer
51 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 ...
0
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1answer
23 views
How to spend a multisignature, CLTV time-locked UTXO?
I am using this locking script with libbitcoin explorer to create a bitcoin testnet transaction:
bx script-to-address -v 196 "[efa716] checklocktimeverify drop 2 [...
0
votes
2answers
37 views
Reference an UTXO of a transaction that has not been yet mined
How to reference an UTXO that has not been yet mined? I want to prepare a transaction and, before spreading it, use its UTXO as input for another relative timelocked transaction. Then, spread the ...
2
votes
1answer
102 views
How does nSequence/Check Sequence Verify work?
How does relative timelock work? I mean, I know the theoretical description, but how to use nSequence concretely ? Can you do me a practical example with 2 sample transactions one of which locked with ...
4
votes
1answer
40 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 ...
1
vote
1answer
38 views
Is it posible to create a transaction output that can either be reddemed by privK of Addr A or by privK of Addr B AFTER certain blockheight?
I am thinking about how to secure your Bitcoin savings.
One idea I had was to create sort of a "backup" address B for an address A which stores the bitcoins. So what I want to achieve is that you ...
1
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2answers
48 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 ...
2
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3answers
73 views
CHECKSEQUENCEVERIFY After x time of last transaction
Is there a way where i can have a multi-sig address which will allow one of the signers to use only their single key after a set amount of time after each transaction/update on the address?
I want ...
1
vote
0answers
161 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&...
1
vote
0answers
76 views
Which wallet provide lock-time feature?
I try to understand how the lock-time and sequence number work, but I got many different explanations, it is really confusing. I like to send a Bitcoin with lock-time to myself, but I don't know how ...
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votes
2answers
131 views
TX nLocktime and mempool
Where is a broadcasted TX located at before it's nLocktime reached? in mempool or not? I have tried a lot can't figure out. Help please.
1
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1answer
347 views
Understanding BIP 143 [hash computation, lockTime, sequence number, witness format]
I'm trying to grasp some of the concepts presented in BIP 143. These are the things I'm stuck on:
(1) A new hash format is presented. This new format is used to create a hash, which when signed with ...
2
votes
1answer
161 views
Simple explanation of how a hash timelock function works with an atomic trade of bitcoin / litecoin trade without a 3rd party?
From my understanding a hash timelock function trade or atomic swap involves 2 transactions one separate blockchains. The BTC user named Bob is making a trade with Alice for her LTC. Assuming its a 1 ...
2
votes
2answers
102 views
Encrypted message with nLockTime
I know you can delay a transaction's accepted date by using nLockTime. I'm still looking for the simplest way to generate a transaction with nLockTime, but that's another topic.
I'm wondering if ...
3
votes
1answer
508 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:
...
0
votes
1answer
163 views
yesterday evening I send out 0.97 BTC. I checked transaction and It says : “ lock time 459355”
are my coins lost ? please help
It says Lock Time: 459355
and still unconfirmed since yesterday
3
votes
1answer
765 views
Understanding GreenAddress nLocktime/recovery transactions
What I understand is that Greenaddress locks a recovery transaction to be spend 90 days in the future. Whats the advantage in doing this?
Why not creating a recovery transaction without nLocktime?
3
votes
2answers
541 views
Is it possible to combine multi-sig and locktime?
Is it possible to create a 1 of 2 multi-sig address in which only one of the keys is time-locked and the other can sign any time?
1
vote
2answers
87 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?
7
votes
1answer
2k views
Why Bitcoin core creates time locked transactions by default?
I've noticed recently that Bitcoin Core is producing transactions with non-zero lock-time and sequence numbers of inputs being 0xFFFFFFFE, even though I didn't instruct it to do so. The lock-time ...
2
votes
2answers
634 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 ...
2
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1answer
150 views
6
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3answers
7k views
What does “lock time” mean?
I got a transaction that is still not confirmed for about one week, and I can see a field called "Lock Time" that says:
Lock Time Block: 419382
https://blockchain.info/en/tx/...
1
vote
1answer
217 views
What happens when relative and absolute lock times are used in the same transaction?
BIP 68 redefines the input sequence number field as bit vector that encodes a relative lock time.
A transaction can be encumbered with an absolute lock time by setting the nLockTime field to a non-...
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1answer
145 views
If transaction has impossible locking script, are coins lost?
If a bitcoin transaction's outputs have a locking script that is basically unsolvable, are the bitcoins lost, or can the transaction be invalidated? (Or something else?)
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vote
1answer
275 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 ...
1
vote
1answer
188 views
Are Hashed Timelock Contracts and Zero-Knowledge Contingent Payments the same thing?
This answer to How is a node in the middle prohibited from keeping the money in a routed Payment in Lightning network? describes how a Hashed Timelock Contract would be used to exchange the "secret" ...
0
votes
1answer
112 views
Restrict the Bitcoin usage only during a particular period
I would like to know if its possible to use a Bitcoin at present in the following scenario.
When I send a Bitcoin to an another user,I set certain parameters on the Bitcoin, like it can only be used ...
3
votes
0answers
91 views
Claim or Refund Functionality Implementation in Bitcoin
I was reading the paper written by Kuramesan and Bentov with title "How to use Bitcoin to Design Fair Protocols".
Source: https://eprint.iacr.org/2014/129.pdf
Specifically, the sender creates a ...
1
vote
1answer
244 views
How does the GreenAddress refill (relock) work when its nLockTime expires?
Ok, I understand that GreenAddress wallet uses a nLockTime transaction to put the funds in a 2of2 wallet, to give the user the peace of mind that, in the case their server disappears, they can still ...
1
vote
1answer
405 views
What is Bitcoin's locktime feature exactly? How can it be used?
What is Bitcoin's locktime feature and what are some example use cases?
And how can a user make use of this new feature? Is it in any gui wallet? And how would one use it in the command line if its ...
4
votes
2answers
339 views
Is it possible to schedule a transaction in the future?
Wondering if it's technically possible to set up a transaction to be sent in the future, for example 6 months? Is this related to block timestamps parameters? Transaction timestamps?
5
votes
1answer
67 views
Is it possible to determine the total amount of timelocked Bitcoin?
Now that is possible to lock funds until a certain date (https://coinb.in/#newTimeLocked). How to calculate how many of all bitcoin in existence is locked until a certain date? Any service that does ...
1
vote
1answer
532 views
Timelock Transactions
I would like to know if timelock transactions are considered standard with the current bitcoin client. If the answer is no, this means that you should use a different client or is it up to user choice?...
4
votes
1answer
1k 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, ...
3
votes
3answers
249 views
What will happen when nLockTime is used along with Counterparty transactions
I heard that Counterparty cannot handle lock time, but I cannot understand why.
What will happen when we use nLockTime in a transaction which includes Counterparty transactions?
2
votes
0answers
69 views
Bitcoin contracts with stickK.com functionality
Does a BTC service/application allow me to set a nTimeLock transaction that can be interrupted by a single predetermined 3rd party before the transaction has been made public? If a service like this ...
5
votes
3answers
668 views
Is there any way to make an UTXO that cannot be spent until a certain block #?
In bitcoin, each transaction has an nLockTime integer to specify the earliest allowed block number/time that the transaction can be added to the blockchain. In addition, each transaction input has an ...
4
votes
1answer
526 views
nLockTime transactions, how do they persist? Are they broadcast before they are valid?
If nLockTime transactions aren't added to the blockchain until the nLockTime is met, then aren't they just being stored in memory of the miners and is there a risk they could get "lost"?
I guess I'm ...
0
votes
1answer
139 views
Can I cancel an offline transaction with this approach? (opposite of nLocktime)
I would like to cancel a transaction I sent offline, and am looking for ways to prevent it from being accepted by the network.
Will the Bitcoin client prohibit the entire Tx if there is even on input ...
4
votes
1answer
261 views
Could I mine a non-final transaction?
I know that non-final transactions (locktime in future and sequence number < MAX_UINT) are not "accepted by miners". However, I could not figure out the exact behavior.
If I mined my own block ...
1
vote
1answer
77 views
How do you publish a transaction which is cancelled if not claimed by a given time?
How do you publish a transaction which is cancelled if some output is not claimed by a given time? (ie returning all the spent coins to their inputs or else creating new conditions under which they ...
2
votes
1answer
172 views
Is the time value in transaction or block information the time it arrived at my client? [duplicate]
Both transactions and blocks have a time field when you use Bitcoin's getblock or gettransaction methods. The API method list defines the transaction time as " time the transaction occurred".
Is this ...
8
votes
2answers
531 views
Can nLockTime TX be used to flood Mempools?
What would happen, if I would create a large number of large transactions with a very high nLockTime?
Would something stop me from filling not only the miners', but also regular nodes' mempools?
...
7
votes
1answer
2k views
How is locktime enforced in the standard client?
I am trying to study the locktime feature of transactions ( https://en.bitcoin.it/wiki/Protocol_specification#tx ). I have created some raw transactions in the testnet with different locktimes, but, ...
1
vote
1answer
221 views
In a given contract, should the “LockTime” timestamp include an extra hour for confirmations to prevent a double spend?
Anytime a transaction has a timestamp attached to it, and there are signed but not submitted transactions at play, shouldn't the holder of the non-submitted tx have to take into account the ...
