Questions tagged [checksequenceverify]

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4
votes
1answer
75 views

Why do Anchor Outputs need to enforce an nSequence of 1?

Quote from https://bitcoinops.org/en/topics/anchor-outputs: As of this writing, the most recent versions of the design add two outputs to the commitment transaction—one for each LN party—and require ...
2
votes
1answer
35 views

Sequence valid before time

I'm studying sequence, and I set a transaction valid after 512 seconds. First of all I use regtest and I start from clean blockchain, after that I mine 114 blocks. At this point miner creates a ...
1
vote
1answer
37 views

Are both CSV and nLocktime unnecessary in Eltoo?

The Eltoo paper says "Notice that we could use nSequence for this purpose, but due to the interplay with OP_CSV we opted to use nLocktime". Now that Lau showed CSV not to be necessary, does that mean ...
1
vote
1answer
67 views

Problem using op_checksequenceverify (op_csv) with relative time flag

i have trouble in using op_csv. The spending condition is not match to my expectation. FUNDING Redeem Script Hex: 03010040b27576a91451d2a5e04d25ceaa86e600a6ec34bd24431c675d88ac Redeem Script Asm: 03&...
0
votes
1answer
25 views

How many bytes long should nSequence be?

When I look at the following raw transaction from: https://blockstream.info/tx/a175425ee2f3c01acc97ef32ab1082db14eaa94e5af4c54f02f3b01dec72558e?expand ...
1
vote
2answers
63 views

Could someone provide an example of a tx spending from an input with a relative LockTime?

I want to see an example of a raw transaction which spends from an input which has a relative LockTime applied to it. An example would be a transaction from a Lightning payment channel in which a user ...
0
votes
0answers
162 views

How to use “OP_CHECKSEQUENCEVERIFY” in regtest?

I have created a P2sh includes OP_CHECKSEQUENCEVERIFY and funded the same. I was trying to redeem the coins. But i could not understand the working of OP_CHECKSEQUENCEVERIFY. Below is the example ...
2
votes
2answers
334 views

Error: non-mandatory-script-verify-flag (unknown error) (code 64) with OP_CHECKSEQUENCEVERIFY (OP_CSV)

I am trying to implement a relative time lock on a regtest network using OP_CSV and keep getting this error when I try to consume the locked BTC. I am creating a UTXO with the scriptPubKey as 10 ...
1
vote
1answer
176 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 ...
5
votes
2answers
131 views

What is transaction “finality”?

bitcoind IsFinalTx() as seen here checks the properties of a transaction in this order: Is nLockTime exactly 0? That's final. return. If it's not 0, is it below the current block height / time? If so,...
5
votes
1answer
506 views

What does the sequence in a transaction input mean?

Following a transaction input: What is the meaning of the sequence number? What does the 4294967295 tell me?
3
votes
1answer
128 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 ...
1
vote
1answer
639 views

Bitcoin Script: mandatory-script-verify-flag-failed Script failed an OP_EQUALVERIFY operation

I try to spend a P2SH transaction (in regtest) with a timelockscript of 200 blocks. I got the following error: mandatory-script-verify-flag-failed (Script failed an OP_EQUALVERIFY operation) (...
0
votes
1answer
125 views

Why are some of my peers rejecting this CSV transaction?

The CSV-redeeming TX I broadcast: https://www.blocktrail.com/tBTC/tx/807d464fff227ce98cfb5f1292069e2793e99f21b0539a1729cc460af32add77 The locktime was set for ten minutes, and the redeeming tx (...
2
votes
3answers
126 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 ...
2
votes
0answers
247 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
1answer
107 views

Question about nSequence with regard to bip-0112 and bip-0068

So far my understanding is that when you create an op_csv output the value entered before the OP_NOP3 is an arbitary number, lets say 10. This number can be interpreted as block based of time based ...
5
votes
1answer
597 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: ...
4
votes
1answer
878 views

Does the bitcoin testnet3 network support Segwit and OP_CSV?

As far as I know, Segregated Witness and OP_CHECKSEQUENCEVERIFY are the last features needed to be able to fully implement a trustless bi-directional payment channel, from start to finish. (...
5
votes
2answers
349 views

Why does the time interval for OP_CSV need to be in the nSequence field when it is already in the script?

BIP68 prescribes how to put the time interval into the nSequence field but then BIP112 tells you that it is possible to specify it in the script with a notation like "30d". Why are there two ...
2
votes
1answer
97 views

Is CheckSequenceVerify only a stop-gap measure?

The Lightning Paper v0.5.9.2 says that CSV "would permit further abilities, including allowing a stop-gap solution before a more permanent solution for resolving transaction malleability. A future ...
11
votes
1answer
2k views

What does OP_CHECKSEQUENCEVERIFY (OP_CSV) do?

Some people have suggested repurposing OP_NOP3 as a new opcode, OP_CHECKSEQUENCEVERIFY. What would the new opcode do? Why is it useful? Can't the signer choose the sequence field when they sign?