Questions tagged [checksequenceverify]

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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?
4
votes
2answers
298 views

OP_CHECKSEQUENCEVERIFY: why to put it into nSequence field if it is already into the script?

BIP68 prescribes how to put the time interval into the nSequence field but then BIP112 tells you that is possible to specify it into the script with a notation like "30d". Why are there two ways of ...
4
votes
1answer
850 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. (...
3
votes
1answer
210 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
550 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: ...
2
votes
1answer
87 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 ...
2
votes
1answer
92 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 ...
2
votes
2answers
96 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 ...
2
votes
3answers
104 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
1answer
66 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,...
1
vote
1answer
40 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&...
1
vote
2answers
43 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 ...
1
vote
1answer
80 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 ...
1
vote
1answer
104 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 ...
1
vote
1answer
294 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) (...
1
vote
0answers
203 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&...
0
votes
1answer
21 views

How many bytes long should nSequence be?

When I look at the following raw transaction from: https://blockstream.info/tx/a175425ee2f3c01acc97ef32ab1082db14eaa94e5af4c54f02f3b01dec72558e?expand ...
0
votes
1answer
87 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 (...
0
votes
0answers
74 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 ...