Sure, you’ll be able to decide to knowledge this manner, however there may be nothing particular about Taproot right here.
The Pay-to-Contract building used to tweak the basis key in Taproot is usually usable, and has in reality been used for precisely this function. In reality, it is likely one of the mechanisms utilized in OpenTimestamps to decide to timestamped knowledge (together with a variant sign-to-contract which makes a signature decide to knowledge slightly than a public key). It’s also utilized in Blockstream’s Liquid pegin mechanism, the place transfers from Bitcoin to Liquid pay to an handle derived utilizing a tweaked key of the federation, which commits to the switch data.
In reality, utilizing an extra leaf in Taproot for that is overkill, and would inevitably enhance the depth within the Merkle tree for at the very least one different leaf – leading to elevated spending value. Simply utilizing pay-to-contract or sign-to-contract instantly on one of many public keys concerned may be finished with zero value to on-chain spending insurance policies.
Would this not considerably scale back the price of companies like coloured cash, timestamping companies, and many others, which commit their knowledge instantly onto the chain?
First rate timestamping companies already use higher strategies.
For coloured cash it relies upon whether or not they simply want timestamping or precise publication of information. My understanding is that it is usually the latter (as in any other case, they want one other censorship-resistant channel to switch the precise knowledge, which might then in all probability be used instantly).
