Questions tagged [sequence]

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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 ...
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1answer
44 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,...
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1answer
30 views

Where is a tx located before finalized with the sequence number or locktime?

My understand, for a tx, before it finalized with the locktime, it can not go into mempool. But, which specified location is the tx to stay for waiting the locktime come. Similiar, for before the ...
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1answer
159 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?
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1answer
104 views

Why mark a transaction as RBF (Replace-by-Fee) explicitly?

I could broadcast a second transaction that has the same inputs but a higher fee, without marking the original transaction as replaceable. Miners would most likely favor the second transaction and ...
0
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1answer
209 views

Lightning Network's RSMC: what happens if there's no revocation transaction?

From the Lightning Network's whitepaper, page 19: If they do not broadcast their most recent version, they will be penalized by taking all the funds in the channel and giving it to the ...
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0answers
95 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 ...
1
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1answer
405 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 ...
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1answer
361 views

What is the “sequence” and its details as referenced for the segwit application?

On the segwit page there is a reference that the "feffffff" is the "sequence". What does the "sequence" represent in relation to what? Does it always have to be "feffffff"? What happens if it's "...
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1answer
243 views

What is the recomended sequence for signalling RBF?

What is the recommended nSequence for signalling RBF transactions? BIP125 says: A transaction is considered to have opted in to allowing replacement of itself if any of its inputs have an ...
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1answer
533 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: ...
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1answer
1k views

Why does blockchain.info show the warning “Transaction rejected by our node. Reason: The transaction is not final”?

The transaction fc3f81c625720063c5cab2145bcb5ef20b13ff0aa73b0b2435ffdb645acfcb8b has the warning "Transaction rejected by our node. Reason: The transaction is not final." on Blockchain.info. The same ...
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1answer
225 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
575 views

What is an “insecure transaction type”, as mentioned by Bitcoin Wallet for Android?

I am running Bitcoin Core v0.11.0.0-gd26f951 (64-bit) at home on Ubuntu, and have installed the Bitcoin Wallet for Android on my phone. I sent two transactions from home to my phone: First, Second. ...
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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, ...
5
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3answers
701 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 ...
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1answer
395 views

Can a Ripple Transaction Sequence have gaps?

I am wondering whether a Ripple Transaction with a Sequence number that ships over a few numbers from the previous Sequence number be accepted as a valid transaction in the Ripple Network? For ...
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2answers
7k views

What is TxIn's sequence?

I'm currently trying to generate the genesis block with my code and I've stumbled upon the TxIn sequence field that is not explained in the Protocol Specification wiki page, nor does it seem to appear ...