rfc/content/docs/rfcs/17/README.md

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---
Merge repo with rfc.vac.dev (#310) * Hugo init * Init Hugo book * Add basic README and title * Import RFC: 1/COSS * Move example content to dedicated folder * Basic menu * Tweak single layout * Fix base url and permalink * Basic index tweaks * Add netifly config * gitignore * 1/COSS: Add COSS lifecycle * Remove public artifact * Add basic numbers in menu * Empty READMEs init * Import mvds spec raw * 2/MVDS: Simplify * 3/REMOTE-LOG: Import * 3/REMOTE-LOG: Simplify * 4/MVDS-META: Import * 4/MVDS-META Simplify * Tweaks * 5/WAKU0: Import * 5: Simplify * 6/WAKU1: Import * 6/WAKU1: Simplify * 7/WAKU-DATA: Import * 7/WAKU-DATA: Simplify * 8/WAKU-MAIL: Import * 8/WAKU-MAIL: Simplify * Tweak * 9/WAKU-RPC: Import * 9/WAKU-RPC: Simplify * 10/WAKU2: Import * 10/WAKU2: Simplify * 11/WAKU-RELAY: Import * Tweaks * 11/WAKU-RELAY: Simplify * 12/WAKU-FILTER: Import * 12/WAKU2-FILTER: Simplify * 13/WAKU-STORE: Import * 13/WAKU-STORE: Simplify * 14/WAKU-MESSAGE: Import * 14/WAKU-MESSAGE: Simplify * 15/WAKU-BRIDGE: Import * 15: Simplify * 16: Import * 16: Simplify * 17: Import * 17: Simplify * 18: Import * 18: Simplify * 12: Bump update * 14: Bump update * 11: Bump update * 17: Bump update * 18: Bump update * 16: Bump update * Fix slug for 18 * Editor changes for 11, 12, 15 * Revert "Editor changes for 11, 12, 15" This reverts commit 5c32fe791bec57ca1d5326e0d2724339f12a784a. * Revert "Revert "Editor changes for 11, 12, 15"" This reverts commit ccd75131d72a1f1c43b701f445fe66ebd6857fc4. * Editor changes for 13, 2, 4 * Move current specs to archive * Update README * bump
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slug: 17
title: 17/WAKU-RLN
name: Waku v2 RLN Relay
status: raw
editor: Sanaz Taheri <sanaz@status.im>
---
The current specification embodies the details of the spam-protected version of `relay` protocol empowered by Rate Limiting Nullifiers (RLN). More details on RLN can be found in [this spec]() (TODO: to link the spec).
The security objective is to control the number of PubSub messages that each peer can publish per epoch (where epoch is a system design parameter), regardless of the published topic.
**Protocol identifier***: `/vac/waku/waku-rln-relay/2.0.0-alpha1`
# Motivation
In open p2p messaging networks, one big problem is spam-resistance. Existing solutions, such as Whispers proof of work, are insufficient, especially for heterogeneous nodes. Other reputation-based approaches might not be desirable, due to issues around arbitrary exclusion and privacy.
We augment the `relay` protocol with a novel, light, and effective spam prevention mechanism which also suits the resource-constrained nodes.
TODO: Fill in more
# Flow
## SetUp and Registration
Adds the sequence diagram of rln relay (#264) * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * Feature/add json rpc api spec (#265) * Minor improvements; added polling for latest messages * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Add Admin API (#267) * Add Admin API * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers Co-authored-by: Hanno Cornelius <68783915+jm-clius@users.noreply.github.com> Co-authored-by: Oskar Thorén <ot@oskarthoren.com>
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A peer willing to publish a message is required to register. Registration is moderated through a smart contract deployed on the Ethereum blockchain. The state of the contract contains the list of registered members (realized by a Merkle Tree). An overview of registration is illustrated in Figure 1.
For the registration, a peer creates a transaction that sends x (TODO to be specified) ETH to the contract. The peer who has the "private key" `sk` associated with that deposit would be able to withdraw x ETH by providing valid proof. Note that `sk` is initially only known by the owning peer however it may get exposed to other peers in case the owner attempts spamming the system i.e., sending more than one message per epoch.
TODO: the interaction with the contract is subject to change depending on the final implementation
Once registered, the peer obtains the root of the tree (after the registration of the current peer) i.e., `root` as well as the authenticity path `authPath`. A peer can prove her membership using the `authPath`.
`sk` and `authPath` are secret data and MUST be permanently and locally stored by the peer.
TODO: To specify the details of protobuf messages for the interaction with the contract
Adds the sequence diagram of rln relay (#264) * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * Feature/add json rpc api spec (#265) * Minor improvements; added polling for latest messages * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Add Admin API (#267) * Add Admin API * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers Co-authored-by: Hanno Cornelius <68783915+jm-clius@users.noreply.github.com> Co-authored-by: Oskar Thorén <ot@oskarthoren.com>
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<!-- diagram -->
<p align="center">
<img src="../../../assets/rln-relay/rln-relay.png" />
<br />
Figure 1: Registration.
</p>
TODO: the function calls in this figure as well as messages are subject to change
## Publishing
In order to publish at a given `epoch`, the publishing peer proceeds based on the regular relay protocol. However, in order to protect against spamming, each PubSub message must carry a `proofBundle`. At a high level, the `proofBundle` is a zero-knowledge proof (TODO: to clarify what a zero-knowledge proof means) signifying that the publishing peer is a registered member, and she has not exceeded the messaging rate at the given `epoch`.
The `proofBundle` is embedded inside the `data` field of the PubSub message, which, in the `relay` protocol, corresponds to the `WakuMessage`. More details on the `proofBundle`'s message fields are provided under the Protobuf section.
The proof generation relies on the knowledge of `sk` and `authPath` (that is why they should be permanently and privately stored by the owning peer). Further inputs to the proof generation are `root`, `epoch` and `payload||contentTopic` where `payload` and `contentTopic` come from the `WakuMessage` (TODO: the inputs of the proof generation may change). The proof generation results in the following data items which are included as part of the `ProofBundle`:
1. `shareX`
2. `shareY`
Adds the sequence diagram of rln relay (#264) * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * Feature/add json rpc api spec (#265) * Minor improvements; added polling for latest messages * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Add Admin API (#267) * Add Admin API * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers Co-authored-by: Hanno Cornelius <68783915+jm-clius@users.noreply.github.com> Co-authored-by: Oskar Thorén <ot@oskarthoren.com>
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3. `nullifier`
4. `zkProof`
Adds the sequence diagram of rln relay (#264) * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * Feature/add json rpc api spec (#265) * Minor improvements; added polling for latest messages * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Add Admin API (#267) * Add Admin API * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers Co-authored-by: Hanno Cornelius <68783915+jm-clius@users.noreply.github.com> Co-authored-by: Oskar Thorén <ot@oskarthoren.com>
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The tuple of (`nullifier`, `shareX`, `ShareY`) can be seen as partial disclosure of peer's `sk` for the intended `epoch`. Given two such tuples with identical `nullifier` but distinct `shareX`, `ShareY` results in full disclosure of peer's `sk` and hence burning the associated deposit. Note that the `nullifier` is a deterministic value derived from `sk` and `epoch` therefore any two messages issued by the same peer (i.e., sing the same `sk`) for the same `epoch` are guaranteed to have identical `nullifier`s.
Note that the `authPath` of each peer depends on the current status of the registration tree (hence changes when new peers register). As such, it is recommended (and necessary for anonymity) that the publisher updates her `authPath` based on the latest status of the tree and attempts the proof using her updated `authPath`.
## Routing
Upon the receipt of a PubSub message, the routing peer needs to extract and parse the `proofBundle` from the `data` field. If the `epoch` attached to the message has a non-reasonable gap (TODO: the gap should be defined) with the routing peer's current `epoch` then the message must be dropped (this is to prevent a newly registered peer spamming the system by messaging for all the past epochs).
Adds the sequence diagram of rln relay (#264) * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * Feature/add json rpc api spec (#265) * Minor improvements; added polling for latest messages * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Add Admin API (#267) * Add Admin API * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers Co-authored-by: Hanno Cornelius <68783915+jm-clius@users.noreply.github.com> Co-authored-by: Oskar Thorén <ot@oskarthoren.com>
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Furthermore, the routing peers MUST check whether the `proofBundle` is valid and the message is not spam. If both checks are passed successfully, then the message is relayed. If `proofBundle` is invalid then the message is dropped. If spamming is detected, the publishing peer gets slashed. An overview of routing procedure is depicted in Figure 2.
### Spam Detection and Slashing
Adds the sequence diagram of rln relay (#264) * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * Feature/add json rpc api spec (#265) * Minor improvements; added polling for latest messages * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Add Admin API (#267) * Add Admin API * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers Co-authored-by: Hanno Cornelius <68783915+jm-clius@users.noreply.github.com> Co-authored-by: Oskar Thorén <ot@oskarthoren.com>
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In order to enable local spam detection and slashing, routing peers MUST record the `nullifier`, `shareX`, and `shareY` of any incoming message conditioned that it is not spam and has valid proof. To do so, the peer should follow the following steps.
1. The routing peer first verifies the `zkProof` and drops the message if not verified.
Adds the sequence diagram of rln relay (#264) * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * Feature/add json rpc api spec (#265) * Minor improvements; added polling for latest messages * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Add Admin API (#267) * Add Admin API * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers Co-authored-by: Hanno Cornelius <68783915+jm-clius@users.noreply.github.com> Co-authored-by: Oskar Thorén <ot@oskarthoren.com>
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2. Otherwise, it checks whether a message with an identical `nullifier` has already been relayed.
1. If such message exists and its `shareX` and `shareY` components are different from the incoming message, then slashing takes place (if the `shareX` and `shareY` fields of the previously relayed message is identical to the incoming message, then the message is a duplicate and shall be dropped).
2. If none found, then the message gets relayed.
Adds the sequence diagram of rln relay (#264) * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * Feature/add json rpc api spec (#265) * Minor improvements; added polling for latest messages * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Add Admin API (#267) * Add Admin API * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers Co-authored-by: Hanno Cornelius <68783915+jm-clius@users.noreply.github.com> Co-authored-by: Oskar Thorén <ot@oskarthoren.com>
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An overview of slashing procedure is provided in Figure 2.
TODO: may shorten or delete the Spam detection and slashing process
TODO: may consider [validator functions](https://github.com/libp2p/specs/tree/master/pubsub#topic-validation) or [extended validators](https://github.com/libp2p/specs/blob/master/pubsub/gossipsub/gossipsub-v1.1.md#extended-validators) for the spam detection
Adds the sequence diagram of rln relay (#264) * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * Feature/add json rpc api spec (#265) * Minor improvements; added polling for latest messages * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Add Admin API (#267) * Add Admin API * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers Co-authored-by: Hanno Cornelius <68783915+jm-clius@users.noreply.github.com> Co-authored-by: Oskar Thorén <ot@oskarthoren.com>
2020-12-07 04:52:31 +00:00
<p align="center">
<img src="../../../assets/rln-relay/rln-message-verification.png" />
<br />
Figure 2: Publishing, Routing and Slashing workflow.
</p>
TODO: the function calls in this figure as well as messages are subject to change
# Security Considerations
TODO: add discussion about the anonymity (e.g., the `StrictNoSign` policy)
TODO: discuss about the economic spam guarantees
-------
# Protobuf
```protobuf
//TODO may include the pubsub message
// TODO to reflect this change on WakuMessage spec once the PR gets mature
message WakuMessage {
optional bytes payload = 1;
optional uint32 contentTopic = 2;
optional uint32 version = 3;
optional ProofBundle proofBundle = 4;
}
message ProofBundle {
int64 epoch = 1; // indicating the intended epoch of the message
// TODO shareX and shareY
Adds the sequence diagram of rln relay (#264) * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * Feature/add json rpc api spec (#265) * Minor improvements; added polling for latest messages * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Add Admin API (#267) * Add Admin API * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers * adds the registration image * Updates the registration seq diagram with more descriotions * WIP: the message verification diagram * fixes some spacing issues * minor * adds the routing and publishing figure * minor * fixes a format issue * adds nullifier map init for all the relay nodes * removes box borders * returns the borders * fixes spacing issues * internalNullifier -> nullifier, and edits on the msc figures * edits the slash part * updates spacing of the rln-relay figure * edits on entities * Update waku-rln-relay.md * adds references to the figures in the text * minor * adds one more relay node to the registration fig * Update assets/rln-relay/rln-relay.msc Co-authored-by: Oskar Thorén <ot@oskarthoren.com> * changes the width of figure 2 * some spacing edits and file headers Co-authored-by: Hanno Cornelius <68783915+jm-clius@users.noreply.github.com> Co-authored-by: Oskar Thorén <ot@oskarthoren.com>
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bytes nullifier = 2;
bytes root = 3; // TODO may be removed and added as part of zkProof
// TODO zkProof
}
// TODO ZKProof may be a separate message type
// TODO the protobuf messages for communicating with the contract
```
TODO: to describe ProofBundle message fields
# Copyright
Copyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).