Rusty Russell -- The Great Script Restoration Project

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23 күн бұрын

Rusty Russell from Blockstream explains his Great Script Restoration Project.
You're probably aware that v0.3.1 of Bitcoin disabled numerous Script opcodes, most famously OP_CAT. Bringing them back unlocks a great deal of power, and there are a few additional opcodes that complement them well in a modern Bitcoin system (such as key addition). This talk aims to present a coherent model for making Bitcoin Script as capable as I think it can be, while avoiding the pitfalls which caused it to be hobbled in the first place.
bitcoin++ Austin 2024
Rusty's Twitter: / rusty_twit
Conference website: btcpp.dev

Пікірлер: 6

@telelvisjr 20 күн бұрын

came for inspiration and Rusty's enthusiasm, wasn't disappointed

@MrCoreyTexas 20 күн бұрын

At 8:20, In regards to comparing OP_SHA256 (hash with SHA256 once) and OP_HASH256 (hash with SHA256 twice), the times are almost equal, because in the case of OP_HASH256, after you hash once, the second time you're only hashing 32 bytes. So even if you had to hash 520 bytes the first time, the second time you're only hashing 32 bytes, which is comparable to OP_SHA256 (only hashing 520+32 bytes vs just 520)

@MrCoreyTexas 20 күн бұрын

At 12:00, I thought that whilst values are stored in little endian, that applies byte by byte, in other words, each byte is in big endian format, but the least significant byte comes first and the most significant byte comes last.

@ijiikieru 20 күн бұрын

I still don't get it.

@MrCoreyTexas 20 күн бұрын

He assumes you already know bitcoin script, basically he presents 2 bitcoin script programs that do something stupid over and over again, burning up many seconds of CPU. If it burns up 700 seconds of CPU, that's really bad, because bitcoin blocks are produced every 600 seconds on average. You really want your scripts to run in less than a few seconds, ideally less than a second. It gets into things like it's hard to use a computer to look at a program and have the computer say "oh no, this is a stupid program, I won't run it".