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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 serialized base transactions. “total size” is the length of a post-segwit block, which contains both serialized base transactions and serialized witness transactions (as defined in BIP-144). The weight of any block must not exceed 4 MB.

The weight of a block without pay-to-witness scripts can found by computing total size. It’s tempting to set base size equal to total size:

block weight = 3 * base size + base size = 4 * base size 

But this assumes the length of the serialization of a non-segwit base transaction equals the length of the serialization of a non-segwit witness transaction. This doesn’t appear to be the case:

Serialization

The witness transaction serialization format appears to follow the structure shown above (which is also the input to find wtxid). Notice two additional bytes before the list of inputs (marker and flag, respectively). Moreover, the witness requires at least one byte (the witness field count) even if no fields are present.

In other words, a witness transaction serialization will always be at least three bytes longer than a base transaction serialization, regardless of whether a witness is present.

If this is correct, then segwit is in fact reducing the block size limit for blocks devoid of pay-to-witness scripts by a factor proportional to the number of transactions in the block.

What am I missing?

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Solana Price Prediction for Today, August 12: SOL Ready to Break Above $45 Resistance

The Solana price prediction shows that SOL is beginning to restart the uptrend after trading below the moving averages. Solana Prediction Statistics Data: Solana price now – $44.73 Solana market cap – $15.4 billion Solana circulating supply – 348.374 million Solana total supply – 511.6 million Solana Coinmarketcap ranking – #9 SOL/USD Market Key levels:::Listen

The Solana price prediction shows that SOL is beginning to restart the uptrend after trading below the moving averages.

Solana Prediction Statistics Data:

  • Solana price now – $44.73
  • Solana market cap – $15.4 billion
  • Solana circulating supply – 348.374 million
  • Solana total supply – 511.6 million
  • Solana Coinmarketcap ranking – #9

SOL/USD Market

Key levels:

Resistance Levels: $70, $75, $80

Support Levels: $20, $15, $10

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SOL/USD looks green today as the price hovers above the resistance level of $44 and a daily close above the $45 level may increase the Solana price to the $50 resistance level. However, traders should note that a consistent price increase may bring more buyers into the market as bulls increase their positions.

Solana Price Prediction: Price May Begin to Break Higher

In the past few days, after the Solana price crossed above the 9-day moving and 21-day moving averages, SOL/USD is now looking forward to breaking above the upper boundary of the channel. Moreover, the daily chart reveals that if the coin breaks to the upside, it will push the coin to the upside.

Meanwhile, the bears may take advantage and bring the coin below the moving averages if the bulls fail to move the price upward. Meanwhile, the technical indicator Relative Strength Index (14) is likely to cross above the 60-level. More so, if the Solana price stays above the moving averages, it could hit the resistance levels of $70, $75, and $80 but facing the south may bring the price to the supports at $20, $15, and $10.

SOL/BTC Market: Price Remains at the Downside

Against Bitcoin, the Solana price is hovering above the 9-day and 21-day moving averages. However, intraday trading is ranging as the coin moves to cross above the upper boundary of the channel, which could reach the resistance level at 2500 SAT and above.

SOLBTC – Daily Chart

On the contrary, if the sellers bring the market to the south, traders can expect a fall below the moving averages, breaking below this barrier may hit the support at 1250 SAT and below. Meanwhile, the technical indicator Relative Strength Index (14) moves to cross above the 60-level, suggesting more bullish signals.

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What is the weight of a block that contains no pay-to-witness scripts?

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