[stacks 2.1] expose BTC/STX exchange rate in Clarity

[jcnelson]

We know how much BTC was spent to mint a Stacks block, and we know how much STX was produced / acquired in it. This information could be exposed in get-block-info?.

[gregorycoppola]

I like this feature. I like that we can get the exchange rate without looking off chain.

Using this exchange rate, a miner could stake STX to collateralize a BTC withdrawal.

And if they try to steal the BTC, they can be penalized in STX by the Stacks chain.

[MarvinJanssen]

Could be very useful. 😁

[igorsyl]

I would not call this ratio an exchange rate given miners expect a premium. This ratio could differ from market-based exchange rate by more 10%.

[jcnelson]

Miners spend X BTC, and get Y STX, and this information is now reported to Clarity. get-block-info? now reports X and Y on request, so I closed this issue.

Also, this is factually the exchange rate. Just because an exchange says something different doesn't make it true; the only thing that matters here is what happens on-chain.

[gregorycoppola]

@jcnelson What if there is an on-chain market for BTC/STX.. can we get the rate from there?

[jcnelson]

Sure -- this would be the way to get that exchange rate.

[gregorycoppola]

I mean where people are literally (trustlessly) trading STX for BTC.. without anyone being a miner.

Just a market.

[blockstack-devops]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.