2.1 Solana-EVM Cross-Chain Integration

2.1 Solana-EVM Cross-Chain Integration Copied

One of the most technically innovative aspects of the TokenFactory architecture is its seamless interoperability between the Ethereum Virtual Machine (EVM) and Solana's runtime via LayerZero's cross-chain messaging protocol. This cross-domain capability enables native token minting and swapping between Solana-based SPL tokens and Ethereum-based ERC-20 tokens without relying on traditional wrapped token mechanics.

Architecture Overview

The Solana-EVM integration involves the following core components:

1. Solana Program (Rust)
   A Solana program listens for cross-chain messages originating from Ethereum. This program is responsible for:

   • Locking or unlocking SPL tokens.

   • Verifying LayerZero message authenticity via its Solana endpoint.

   • Executing CPI (Cross-Program Invocation) calls to the SPL Token Program for minting/burning.

2. Ethereum Smart Contract (Solidity)
   A mirrored ERC-20 contract allows Ethereum users to:

   • Mint equivalent ERC-20 tokens when SPL tokens are locked on Solana.

   • Burn ERC-20 tokens to unlock their corresponding SPL tokens on Solana.

   • Relay encoded LayerZero payloads to LayerZero’s endpoint for routing.

3. LayerZero Endpoint (V2)
   The LayerZero endpoint enables atomic messaging between heterogeneous blockchains. For Solana-EVM communication:

   • Messages are encoded with

     msgType

     , token address, recipient, and quantity.

   • The destination chain verifies authenticity and processes instructions deterministically.

   • Payloads are processed either via CPI (Solana) or direct contract calls (EVM).

Payload Encoding Format

(uint8 msgType, bytes32 tokenAddress, bytes32 recipient, uint128 ethAmount, uint256 tokenQty)

This format ensures deterministic decoding on both platforms (Solana via Borsh / manual unpacking, Ethereum via ABI).

Message Flow

• User burns ERC-20 tokens on Ethereum.

• Solidity contract sends LayerZero message to Solana endpoint.

• Solana program decodes message, verifies endpoint origin, and mints SPL tokens.

• User receives native Solana tokens (and vice versa in reverse flow).

Novelty and Technical Significance

This Solana-EVM bridge bypasses legacy bridges and avoids liquidity fragmentation by:

• Utilizing native token contracts on both chains.

• Encoding messages in a custom format understood by both Rust and Solidity environments.

• Leveraging LayerZero’s Ultra Light Node (ULN) security guarantees.

The bridge is not a synthetic token bridge but a true inter-chain mint/burn relay system, contributing to a universal liquidity layer across chains.