Try   HackMD

Batch operator smart contract

Short intro

🌐 Context

Onchain.Storage is an ecosystem of on-chain modular storage protocols that can interact each other, in the form of smart contract live on an EVM compatible blockchain.

💣 Problem

A user who wants to interact with different protocols has to do separate transactions and wait for separate responses. This inherently slows down the whole process making it inefficient.

🎯 Goal

Create a protocol which allows any user interact with a dynamic list of protocols, managing them using a set of admin keys. In essence, we are introducing a proxy contract that manages different contracts' interaction.

📌 Protocol Overview

At high level, the protocol works as follows

  • There is a set of admin keys which allow to call specific contracts
  • In order to reduce the overall complexity we aim these contracts to be static (i.e. not upgradable)
  • All the calls will be packed off-chain and sent as pure data to the receiver contracts, this means we don't need to integrate ABI

Protocol Description

A proxy contract forwards client calls to one or more contracts. Since in principle anyone is allowed to forward transactions to any contract, we implement an enablement check for the legitimate contracts in order to avoid potential unexpected outcomes.

The protocol basically consists in three functions:

  • An Admin function, to add/remove admins.
  • A Protocol Enabler function, to add/remove allowed protocols.
  • A proxy function, which contains the logic of the forwarder itself.

Add or remove admins

To manage admins we need to run following function

manageProtocolAdmins(address admin, bool state)

This function will enable the admin if the state is true or will disable the address if false.

Enable or disable protocols

To manage protocols we need to run following function

manageProtocolContracts(address protocol, bool state)

This function will enable the protocol if the state is true or will disable the address if false.

Create a proxy call

To create a proxy call we need to run following function

createOnchainProxyTransaction(address[] protocols, unit256[] values, bytes[] data)

As we can see all the parameters are arrays, so the contract can loop over protocols, values and data.

Flow

  • The contract will check if protocols are allowed.
  • The contract will also check if the sum of values is exactly the msg.value amount, so the user can't cheat over values.
  • The loop will throw an error if one of the calls fails.
  • No event will be emitted to avoid gas consuption.

Sillabus

  • admin: Address representing an admin
  • protocol: Address representing a protocol smart contract
  • protocols: List of addresses representing more than one protocols smart contrats
  • values: List that describes how the total value sent to bulk contract is divided among each protocol
  • data: List that collects the data being sent to each protocol
Last changed by 
 
Sebastiano Cataudo
11
249

Read more

Retriev/Web3Storage - batch change proposal

🌐 Context We are working on the Batch operator smart contract and we found a blocker since to make createDealProposal work we need to add another parameter owner to define who is requesting the deal proposal. 💣 Problem We want to be sure that no-one can create deal proposals on behalf to other users because we want to prevent any kind of spam. 📌 Proposal Overview We have to add the parameter owner to createDealProposal so it will be function createDealProposal(address owner, string memory _data_uri, uint256 duration, uint256 collateral, address[] memory _providers, address[] memory _appeal_addresses) We have to add another state variable which will be called bulkContract which will contain the address of the allowed contract

Dec 9, 2022
IPFS Metadata Registry

This protocol is still a WIP, comments are very appreciated. Problem IPFS lacks the ability to search inside the huge amount of existing data, you must know exactly where a file is (by knowing the ContentID or CID) to get it back. This means there's no way to search inside the network using "words". Since the decentralized web is getting more attention, we expect the next years more and more people will start hosting applications and protocols using IPFS. But like the pre-google internet there's no simple way to discover contents. Goal The protocol aims to create a collaborative, open-source way to track (and search) relevant data on IPFS. Let's say the main goal is to create the "Google of IPFS", of course taking only the good parts. Service will not track users and will remain privacy-oriented due to the simple fact that the entire database is shared between protocol's nodes.

Oct 14, 2022
Read more from Sebastiano Cataudo
Published on HackMD