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[requires fork] Elements should have a jet to access input asset ID for reissuances #327
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Activity
I think the
issuanceTokenjet is supposed to do what you wantAlso contract can just hard code the reissuance token ID. So long as you know know the prevout of the input to create the token, and the entropy you will add, the wallet can compute the reissuance token ID, and then hard code it into the covenant.
You don't know this data until after the tokens are issued (and they are supposed to be issued directly into a contract).
I guess you could do a two-stage issuance: first into an ordinary address and then into a contract where the relevant constants are hardcoded. Overall this would be much more efficient.
I initially though you'd need a two-stage issuance as well, but I'm pretty sure you don't. You just need to know what prevout will be used as the input that does the issuance, and the contract hash that you will be using. This is all available.
Reacted by Andrew PoelstraAhh, yes, I think you're correct.
@KyrylR You can (and should) take Token IDs and Asset IDs as parameters in your smart contracts, and have the wallet compute these values. They are a function of the prevout of input that will be used to issue them, and the contractHash you will be providing. Generally speaking, any computation that can be pulled out of Simplicity, should be pulled out of Simplicity.
Reacted by Kyrylo Riabov
Elements has some annying logic for reissuances in which you are required to spend a confidential output containing a reissuance token, but you must reveal the blinding factor, in order to do a reissuance.
This is crazy but requires a hardfork to fix.
Meanwhile, for contracts to assert on the input type of a reissuance token, they need to reimplement the unblinding logic in Simplicity. (Or hack the crypto by doing ugly/inflexible/poorly-supported-by-wallets things like enforcing that an output asset have exactly the same commitment as an input asset.)
Anyway we ought to have a jet to do this work. Unsure where the best place to post "jet wishlist" issues is.