Innovation or attack? Sorting out the "NFT Big Block" on the Bitcoin Network
Written By:Liu Changyong On February 1, 2023, Bitcoin Network mined the largest block in the history of nearly 4M, containing a nearly 4M largest transaction in the history, and the transaction fee is 0. The big transaction was sent out by indie developer @udiWertheimer’s “Taproot Wizard”, an NFT project on the Bitcoin network. The main data is an NFT, not a hash, but an entire jpg image. The developer and project have not been named, but the incident has caused a huge shock to the Bitcoin ecosystem, with Blockstream CEO Adam Back (@adam3us), Bitcoin Core developer @LukeDashjr and others calling it an attack on Bitcoin. See CoinDesk’s report:https://www.coindesk.com/tech/2023/02/02/giant-bitcoin-taproot-wizard-nft-minted-in-collaboration-with-luxor-mining-pool/ However, @udiWertheimer stresses that this is an innovation based on “Ordinals” proposed by former Bitcoin core developer Casey Rodarmor. Ordinals Doc:https://docs.ordinals.com/introduction.html @udiWertheimer and Casey Rodarmor claim that the theory can tag every basic unit of bitcoin: satoshi, and can be transferred. NFT is just one of many ways to enable more functionality on the Bitcoin network without the need for a hard and soft fork upgrade. Rodarmor claims that Ordinals came up because Bitcoin lacks a stable public identity. Bitcoin addresses tend to be single-use, wallet accounts are local, and ownership of public and private keys is not transferable. So, by marking each satoshi in each output, Ordinals creates a transferable account or identity for Bitcoin. For technical details see:https://github.com/casey/ord/blob/master/bip.mediawiki Specifically, in the NFT project “Taproot Wizard”, the publisher is supposed to use a specific satoshi to refer to jpg images to implement the identification and circulation of the NFT. I haven’t fully understood how this is done. It’s an interesting experiment in innovation, but bitcoin core doesn’t like it for a couple of reasons: 1. Blockchain size inflation: This will result in the rapid expansion of bitcoin blockchain size, greatly increased requirements for devices running full-node, resulting in the reduction of full-node of the whole network and the decline of anti-censorship. This was the main reason for rejecting Vitalik’s smart contract in OP_RETURN in 2014, and rejecting hard fork expansion in 2017. 2. Ecological impact: Big transactions and Big blocks exceeding expectations impact wallet, mining pool, browser and other ecological facilities, resulting in some facilities abnormal, such as the transaction of btc.com browser failed to parse properly. 3. Reduce security: In order to reduce the time of synchronization and verification of big transactions and blocks, the mining pool or miners may choose not to download and release blocks without verifying the transactions and blocks, which brings security risks. 4. Block limit fails: Bitcoin blocks have a 1M limit, Taproot Wizard’s 4M data is linked to witness, making both blocks and transactions bypass the 1M limit, and there seems to be no limit anymore! 4M is OK, 400M is OK! In that sense, it’s not innovation, it’s an attack on the bug! In the expansion debate in 2017, Bitcoin core refused to expand by means of hard fork to increase the block limit, and chose to use segwit to bring the verification information outside the block on the premise of avoiding hard fork, so as to bypass the 1M block limit and achieve partial expansion. However, there was no restriction on the length of the verification message. Hard choices now have to be made: 1. Do nothing and allow applications to enter the Bitcoin blockchain in this way, making the debate about limiting OP_RETURN and expanding capacity meaningless; 2. Hard fork upgrade, write the size limit of the data witnessed in isolation into the consensus. This is also difficult. The impact of hard fork is great and all nodes need to be updated, which is also the main reason for rejecting the New York Consensus upgrade to 2M in 2017. 3. Reach a partial consensus on major pools and reject big blocks and big tx. This is very bad. It opens the door to manual block review, loses the sense of decentralization, and is operationally difficult for all pools to comply with. Overall, option 1 is more likely because option 3 is difficult to achieve, and the Bitcoin ecosystem is already very large, making it difficult to smoothly hard fork. Relevant data: Block height: 774628 Block size: 3,955,272 bytes Transaction ID 0301e0480b374b32851a9462db29dc19fe830a7f7d7a88b81612b9d42099c0ae Transaction size: 3,938,383 bytes Transaction type: segwit Transaction fee: 0 Block miner: “Luxor Mining” Sending address of transaction: bc1pscu742m5eyt6vwzl62fjugy9mj5yq8pgk674qc2x44892t3zjqfs3ca78z Note: I have not yet sorted out all the technical details, such as how Ordinals implemented NFT, the structure of the isolated witness data and related restrictions, etc. Corrections or additions are welcome. Follow us Wu Blockchain is free today. But if you enjoyed this post, you can tell Wu Blockchain that their writing is valuable by pledging a future subscription. You won't be charged unless they enable payments. |
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