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Penumbra is a fully private proof-of-stake network and decentralized exchange for the Cosmos ecosystem.

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This chunk of work consists of adding functionality to the ICS20 component that receives transfer packets from counterparty chains, verifies them against the counterparty chain state, and acknowledges receipt.

In #430 we added jumbled address encoding. As part of that change, we added a five byte padding (such that the f4jumble construction operates on 16 byte blocks). However, this...

A-shielded-crypto

Fixes errors in our spec/docs noted during a security audit (report forthcoming) This also uses an API change that was added in PR: https://github.com/penumbra-zone/decaf377/pull/31

Currently we are using AES-FF1 to encrypt the address index (previously known as the diversifier index) to produce the diversifier (which needs to appear random). However, once our diversifiers are...

A-shielded-crypto

Currently in our key derivation we compute the ovk and dk from a single hash output as follows: ``` let (ovk, dk) = { let hash_result = prf::expand(b"Penumbra_ExpndVK", &nk.0.to_bytes(), ak.as_ref());...

A-shielded-crypto

**Is your feature request related to a problem? Please describe.** Currently, Penumbra encodes fees as an untyped integer, representing an amount of the staking token. The requirement that fees are...

Related to #2 We've prototyped with PLONK (#666, #665) for the `OutputProof`, and we should perform that same prototyping with some of the groth16 libraries we might use, e.g. https://github.com/arkworks-rs/groth16...

A-zkproofs

Suggested by @hdevalence: > we should change the “FVKHash” to an “Account ID” and make it a Poseidon hash rather than a blake2 instance This is such that we can...