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06:11 < Chris_Stewart_5> What does introspect mean? IIUC OP_TLUV correctly, it requires pushing things onto the stack and popping them off the stack, i don't think it allows direct introspection. Perhaps spliting hairs here though..
06:12 < Chris_Stewart_5> Has there been any more discussion of OP_TLUV anywhere besides the mailing list posts in 2021? I think its a really interesting op code that allows joining/leaving bitcoin protocols in a non interactive fashion IIUC
06:13 < Chris_Stewart_5> also I'm trying to deduce if there is MEV introduced if OP_TLUV added. Usually non-interactive things introduce MEV :/
06:23 < darosior> Chris_Stewart_5: OP_VAULT is basically OP_TLUV with more features
06:24 < darosior> It's got specified into BIP345 (https://github.com/bitcoin/bips/pull/1421) and PR'd against inquisition https://github.com/bitcoin-inquisition/bitcoin/pull/21
06:25 < Chris_Stewart_5> darosior: Thats interesting, i thought it was the opposite, TLUV was a more general OP_VAULT. My understanding with OP_VAULT is it doesn't allow you non interactively join / leave scripts. Also OP_TLUV allows us to do point math rather than simply using Scripts
06:25 < Chris_Stewart_5> you can use just Scripts if you'd like in OP_TLUV though
06:28 < Chris_Stewart_5> darosior: I'm basing my knowledge of OP_TLUV on this mailing list post specifically, perhaps its out of date
06:28 < Chris_Stewart_5> https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2021-September/019420.html
06:29 < instagibbs> yes VAULT is a subset
06:31 < instagibbs> but it's a "use case of control block introspection" which was the original question
06:31 < instagibbs> TLUV as well
06:33 < Chris_Stewart_5> idk if i agree with "control block introspection" unless its literally scanning the control block we enter EvalScript(). Is CSV/CLTV stack introspection?
06:34 < instagibbs> you could push it to the stack and do something with it
06:34 < Chris_Stewart_5> ^
06:35 < instagibbs> not sure that's a good idea, just that it has a use case :)
06:37 < Chris_Stewart_5> also if its of interest to anyone, i'm hacking away at porting 64bith arith from elements to upstream bitcoin: https://github.com/Christewart/bitcoin/commits/64bit-arith 
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06:38 < Chris_Stewart_5> I'm not sure if I fully understand the purpose of casting opcodes (OP_SCRIPTNUMTOLE64, OP_LE64TOSCRIPTNUM, OP_LE32TOLE64) yet. 
06:38 < instagibbs> sanket1729 ^
06:39 < Chris_Stewart_5> and things definitely do not work yet :-)
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14:48 < sanket1729> Chris_Stewart_5, some of the operations INSPECTLOCKTIME push a 32 bit LE value on stack. All the arith operations operate on 64 bit values. 
14:49 < sanket1729> All the operations that take input `intput_index/output_index` take input a CScriptNum. 
14:50 < sanket1729> These conversion operators help with doing arithmetic operations on those
14:56 < sanket1729> Chris_Stewart_5, I took a look at your PR. Are you also planning to add some form of amount/spk introspection. 
14:56 < sanket1729> Arith opcodes are not that useful without having a amount/spk introspection
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15:43 < sanket1729> For example, vaulting operations with OP_VAULT might use of them. The amounts there are encoded in CScriptNum in BIP 345
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--- Log closed Tue Sep 12 00:00:20 2023