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22 sats \ 7 replies \ @0xbitcoiner 16h \ parent \ on: Mempool Space begins visualizing the merkle branches of stratum jobs mempool
I'm afraid you misunderstood. Explain like I'm this guy
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If I understand the graph correctly, it represents the mining similarity between pools. For instance, in the image of this post, BNB Pool, UltimusPool, AntPool, and Poolin are mining the same transactions, as all branches have the same color. The columns represent the branches.
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I'm still trying to figure it out! 😂
/cc @0xB10C
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My question is how to interpret this chart.
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Stratum jobs don’t contain the full list of transactions included in the block template. A miner only needs to construct a block header, which can be done without knowing the full template contents. Modern miners exhaust the 32-bit nonce in the block header quite fast and can then either update the timestamp in the header, roll the version a la overt ASICBoost, or change the so-called extranonce in the coinbase transaction, which causes the Merkle root to change. For this, miners need the coinbase transaction, information about the extranonce, and the Merkle branches to calculate a new Merkle root.
The list of Merkle branches in stratum jobs contains just the information required to calculate the Merkle root. To build the Merkle root, the coinbase transaction is hashes together with the first Merkle branch, the result is then hashed with the second Merkle branch, which is then again hashed with the third Merkle branch. The Merkle root is reached once all Merkle branches have been hashed together.
On the mempool.space/stratum page, each colored column is a merkle branch (marked in red in my image). Normally, these are hashes, but I've started to color them at some point to make it easier to distinguish them. Equal color in a column means equal hash means equal merkle tree branch. If all merkle tree branches are equal, then the block template is the same too. If the block template is frequently the same, you can assume that the pools are the same.
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I'm surprised at myself! Ahahah
Your explanation matches the way I interpreted it. Thank you!