Merkle root for Taproot key path spending?
I'm referring to a page of Taproot test vectors provided in BIP 341.In the section called keyPathSpending and then inputSpending under that, there are 7 JSON objects that provide parameters to test...
View ArticleSpeed of Merkle Root proofs in SPV
Is it really more efficient to use the Merkle Root proofs system to verify that a transaction is included in a block for SPV clients compared to Download the block and check if the transaction is...
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View ArticleHow is the merkle root verified if the mempools may be different?
How is the merkle root verified if the mempools are different? I already understand how its calculated. If a node has a mempool of transactions, and a miner has only some of those transactions and...
View ArticleAre pool provided merkle branches trustable?
I'm a beginner is this field. Can someone explain to me how mining pool provided merkle branches are valid?Normally, when we make the root, it starts from top to bottom, a single change in order can...
View ArticleHow do I retrieve address balances to build a Merkle sum tree?
Curious about building my own proof of solvency program. I understand how the Merkle sum tree works in theory but I am having issues understanding the practical ways of getting the information I...
View ArticleBulletproofs vs Merkle paths for inclusion proofs
In this blog post, Andrew Poelstra comments that bulletproofs can be used for efficient merkle inclusion proofs.How would these proofs compare in size and verifying time to simple merkle paths? Take...
View ArticleWho's exploiting Merkle Root?
What kind of software is going to use a merkle root to know if a transaction is in a block ? I know Thin nodes are doing this but this is a little bit useless since major branches are required.Why...
View ArticleWhat are MATT opcodes?
There is plenty of discussion in the Bitcoin-dev mailing list about MATT opcodes, and I would like to know what these are.
View ArticleUnderstanding Bitcoin Blockchain Storage and the Usage of Merkle Trees [closed]
I'm currently learning about the Bitcoin blockchain.I've come across the concept of Merkle trees in the context of Bitcoin. I understand that Merkle trees are used to verify the integrity of the data,...
View ArticleLegitimate merkle paths for SPV
How does a light client via SPV make sure that the requested merkle path is not fake?I know that the client has its own copy of the block headers, so it can trust the merkle root from there. It then...
View ArticleWhat am I doing wrong in calculating Merkle root of the block with only 2...
I want to learn how to calculate the Merkle root so I started from a simple example, a block with only 2 transactions (block #99997). However, I ran into a problem.Mempool online block explorer says...
View ArticleAre all transactions, whether SegWit or non-SegWit, part of the commitment in...
A merkle root in a block header is a way to commit all transactions in that block. However, since it does not cover transaction witness data, another commitment needs to be made in a coinbase...
View ArticleHow do I calculate the witness commitment hash for a given block?
From my understanding, every SegWit enabled block has an added output script which is used as a place to store the "Witness commitment" specified in BIP 141.One issue I've stumbled upon was calculating...
View ArticleHow to calculate Merkle Root? Need to reverse?
I downloaded the necessary information and made the coinbase. Then I calculated the merkle root... But I always get an error message when I submit a block: "bad-txnmerkleroot". Tere is my code:def...
View ArticleWhat is TXID？Is it used to calculate merkleroot [duplicate]
I downloaded the block template where each transaction contains 'data', 'txid', 'hash'. I read in some articles that the Merkelroot is calculated using 'txid'. Is true? Why txid not hash, and what's...
View ArticleUnderstanding Bitcoin - Usage of Merkle Trees
I'm currently learning about the Bitcoin blockchain.I've come across the concept of Merkle trees in the context of Bitcoin. I understand that Merkle trees are used to verify the integrity of the data,...
View ArticleMerkle tree structure for 9 transactions
I've been reading the developers documentation, other sources and the good books about Bitcoin. But none of the resources shows a merkle tree with 5 or more leafs. I'm confused, does the bitcoin core...
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What is the canonical way of creating merkle tree branches?
I'm currently looking into creating some compact merkle tree branches to prove that a given hash was included in a given merkle root. My initial thought was to list the leaf, the merkle root and all of...
View ArticleWho gives SPV nodes merkle path to do validation for small subset of...
From Mastering bitcoin:Merkle trees are used extensively by SPV nodes. SPV nodes don’t have all transactions and do not download full blocks, just block headers. In order to verify that a transaction...
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