Draft BIP: OP_TXHASH and OP_CHECKTXHASHVERIFY

The email discusses an update to the draft BIP (Bitcoin Improvement Proposal) that includes a proposed reference implementation and a link to an implementation of a caching strategy. The reference implementation demonstrates how it is possible to achieve TXHASH in a way that ensures invocations of TXHASH have clear constant upper limits on the number of bytes hashed, after each large transaction element (such as scripts and annexes) has been hashed exactly once.In the email, a link to the draft BIP is provided, along with another link to the cache implementation on GitHub: https://github.com/stevenroose/rust-bitcoin/blob/txhash/bitcoin/src/blockdata/script/txhash.rsThe email is from Steven Roose via the bitcoin dev mailing list, sent on 9/30/23 at 12:44.