All Questions
Tagged with segregated-witness block-weight
19 questions
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How are the block header bytes treated when calculating the block size in weight?
In pre-segwit, block header bytes were counted as "1 byte" and participated equally in the block size up to 1MB. Since the header is 80 bytes, we would actually have 999,917 bytes (1,000,000 ...
user144491
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0
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185
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Why is the discount on segWit data exactly a factor of 4 and not 5, 6 or something higher?
According to BIP141, the formula for calculating block/transaction weight is:
BASE SIZE * 3 + TOTAL SIZE
According to Bitcoin wiki (and also based on the above formula):
Each byte of the segwit ...
- 1,099
3
votes
1
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86
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Is it possible for the `size` and `vsize` to be the same for a valid segwit (bech32) transaction?
I'm aware that for non-segwit transactions, vsize is always the same as size. But is it possible for a valid transaction to include size=vsize when involving segwit inputs/outputs?
This particular ...
- 308
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Most transactions in a block
Block 689074 had 4,463 transactions.
Is this the highest number of transactions in a block until now?
What are the things that affect the number of transactions possible in a block?
Few observations ...
user103136
1
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1
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Why is the block size so big, taking into account a relatively small number of transactions?
Why the size of the block 656143 is so big (Size: 2,337,727 bytes), taking into account a relatively small number of transactions (Number of Transactions: 84)?
Extra question: What is the block size ...
- 137
23
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2
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14k
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Is there a difference between bytes and virtual bytes (vbytes)?
In an Optech newsletter, size is referred to using vbytes. Is there a difference between vbytes and bytes? If so, what is the difference?
- 719
1
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Concept of Block weight and segwit are still unclear
It seems like duplicated question, but i read many articles and posts to undestand about segwit.
Below links are something i read
What is block weight and how is it different from block size?
After ...
- 41
4
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2
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574
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On chain cost of Segwit version 1 versus version 0
How do total blockchain cost for Segwit version 0 compare to version 1 which is being proposed? I'm specifically interested in a single user transactions – both paying to public key (or pk hash) and ...
- 1,074
9
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2
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How does SegWit reduce transaction size, when the signature is simply moved to another part of the transaction?
This video explains that the signature is moved out of the input section and moved to the new one called the witness. From what I can tell, the witness signature is still contained in this transaction ...
- 193
1
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Can SegWit block weight be increased without a hard fork?
I know segwit's block weight is 4MB. Can it be increased without a hard fork? If no, was that option even considered, and is it even possible?
- 163
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What is the maximum size for SegWit transactions?
Before SegWit was activated, transactions were limited to 100,000 bytes or 100 kB. Bigger transactions were non-standard.
What is the limit for transaction size after the activation of SegWit?
Is ...
- 77.8k
1
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1
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456
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How much will Segwit *actually* increase bitcoin capacity for realistic transactions?
I often see claims that Segwit increases transactions per block by 1.7x to 2x. I'm not sure if this is true, but if I do the math myself, I don't get this number.
My understanding is:
1) The “weight”...
- 133
5
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1
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932
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Why does the Segwit developer guide recommend to estimate fees on basis of vsize instead of weight?
The Segwit Wallet Development Guide has a small section on fee estimation:
Transaction Fee Estimation
Instead of transaction size, a new metric is defined, called “virtual size” (vsize)
...
- 77.8k
3
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2
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792
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How much does the weight of 2-of-3 multisignature inputs differ between P2SH and P2SH-P2WSH?
I'm trying to calculate the weight of a 2-of-3 multisignature P2SH-P2WSH input. I found the related question Predict multi signature transaction size, which I've calculated with m=2, n=3 here:
...
- 77.8k
3
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1
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Do sigops count towards the block weight in SegWit?
I was just rereading the SegWit benefits page and noticed that the section Moving towards a single combined block limit contains an example in which sigops count towards the blockweight.
Did this ...
- 77.8k
3
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1
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1k
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After Segwit Activation, what is the largest block size possible?
The code says MAX_BLOCK_SERIALIZED_SIZE = 4000000, but that is actually not a actually consensus rule as stated here:
https://github.com/bitcoin/bitcoin/issues/10289
The actual consensus rule is ...
- 7,799
2
votes
2
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207
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What is the weight of a block that contains no pay-to-witness scripts?
I'm trying to understand block weight, a metric introduced by segwit (BIP-141):
block weight = 3 * base size + total size
"base size" is the length of a pre-segwit block, which contains only ...
- 2,431
9
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2
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4k
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What is block weight and how is it different from block size?
While reading about BIP141, I have encountered the following options:
Block creation options:
-blockmaxweight=<n> Set maximum BIP141 block weight (default: 3000000)
-blockmaxsize=<n> ...
- 457
7
votes
1
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Why does BIP141 define both virtual transaction size and weight?
Why does BIP 141 (segwit) define both virtual transaction size and weight?
Weight seems to be just four times virtual transaction size (or vice versa, depending on what you define first). Why are ...
- 2,715