Private transactions and private smart contract states

[dmgr]

Aeternity should supports both transaction-level privacy and smart contract privacy.

References:

1. https://media.consensys.net/how-the-zcash-protocol-can-fill-ethereums-privacy-gap-4fb8e58cd429
2. https://media.consensys.net/introduction-to-zksnarks-with-examples-3283b554fc3b
3. https://github.com/jpmorganchase/quorum
4. Precompiled contracts for addition and scalar multiplication on the elliptic curve alt_bn128 ethereum/EIPs#213

[knarz]

Yes, this is definitely something we are going to work on.