Actra is an omnichain framework designed to establish seamless and secure communication between diverse blockchain networks, including both EVM and non-EVM chains. Actra enables developers to build decentralized applications that can send data, transfer assets, and perform custom operations across multiple chains without needing complex cross-chain solutions.

Table of Contents

• Core Concepts
• Components
  • Off-Chain Components
  • On-Chain Components
• Building the project
  • Compilation
• Testing
  • Local Testing
  • Testnet/Mainnet Testing
• Integration
• Audits
• License

Core Concepts

Before diving into implementation, it's important to understand these key concepts:

• Actra: The omnichain protocol that handles message routing, processing and validation across different blockchains.
• Protocol: A third-party system built on top of Actra. This could be an application, a dapp, or any other system.
• Message: An abstract piece of data passed between chains via Actra.
  Messages can contain transaction data, parameters for smart contract calls, or any other type of information necessary for cross-chain or omnichain functionality.

Components

Actra operates with both off-chain and on-chain components:

Off-Chain Components

These are responsible for relaying messages and ensuring the overall operation of the network.

• Agent Network: A Delegated Proof of Stake (DPoS) network composed of off-chain machines known as Agents.
  This network is responsible for transmitting and validating cross-chain communication.
• Agent: A machine within the Agent Network that participates in message processing. Agents validate transactions, submit them to the target chains, and maintain the network.
• Super-agent: A specialized Agent within the Agent Network that focuses specifically on validating actions performed by other Agents. This provides an added layer of security.
• Executor: A module within the Agent, responsible for executing transactions on target chains.
• Listener: A module within the Agent that identifies and retrieves proposals for message transmission from source chains.
• Transmitter: A module within the Agent, responsible for posting proposals into the on-chain system of opBNB smart contracts.
• UDF Adapter: A utility within the Agent, that calculates transaction fees, cross-chain estimations for messages, and valuation of native currencies.

On-Chain Components

These are smart contracts that handle the protocol logic on individual blockchains.

• Endpoint: The main smart contract which receives and handles messages, acting as the entry point to the Protocol on a given blockchain.
• Protocol Contract: A smart contract that implements a specific function or feature and is called by the Endpoint when processing a message.
• Proposer Contract: A contract that creates messages for processing and delivery by the Actra.
• opBNB Contracts: A comprehensive set of smart contracts facilitating core functions, such as staking, agent registration, consensus validation and message processing.

Build and Install

Compiling the contracts

To compile the project contracts use:

npx hardhat compile

Testing

Local testing

yarn test

Testnet or mainnet testing

Please refer to integration section.

Integration

Audits

License

This project is licensed under the MIT License