Ensuring Flexibility and Sustainability of the Zcash Development Fund - Draft

[zkcroc]

A possible method has been breifly discussed here

Coin Voting / Shielded Airdrop / Proof of Balance

Another way to do it is to have the note commit to a fixed-point representation of \frac{\mathsf{v}}{\mathsf{compoundedValue}}. For example, suppose that we start out with \mathsf{compoundedValue} as 100000000, representing 1.0 in fixed point. Each time we read the value from an Orchard note we multiply it by \frac{\mathsf{compoundedValue}}{100000000}, and each time we write the value we multiply it by \frac{100000000}{\mathsf{compoundedValue}}. The effect is essentially the same as before, exc…

And here

Coin Voting / Shielded Airdrop / Proof of Balance

(Speaking just for myself and not for ECC or as a ZIP Editor.) This is only a thought exercise on how this functionality could be achieved, not whether we should do it. It’s not necessary to require proofs of balance (which have potential privacy weaknesses when used for this purpose) in order to claim interest for holding funds in the Orchard pool. To do that, we could alter the protocol as follows: Define the “compounded value” of an Orchard note at a given block height to be 1 at the acti…