Cross-Chain Message Format Validator

WHAT IT DOES

This tool validates cross-chain message formats and bridge integration patterns by analyzing on-chain message structures, events, and delivery logic. It performs a comprehensive suite of read-only checks against a target bridge contract to verify that it correctly implements message formatting according to the specified bridge standard (Axelar, LayerZero, Hyperlane, Wormhole, Chainlink CCIP, or Custom). The tool checks for contract deployment verification, wallet connectivity, message emission events, replay protection (nonce/sequence tracking), and format-specific encoding patterns. Results are presented as a detailed validation report with pass/fail/warn statuses for each test, along with format-specific recommendations. This is essential for developers integrating cross-chain messaging, auditors verifying bridge implementations, and teams ensuring message format compatibility across chains.

HOW TO USE

Connect your wallet (read-only, no transaction required) and select the target network. Enter the bridge name and contract address, select the message format specification (Axelar, LayerZero, Hyperlane, Wormhole, Chainlink CCIP, or Custom), and set the lookback blocks for message analysis. Click "validate message formats" and the tool will verify the bridge contract, analyze its bytecode and ABI for message format patterns, check wallet connectivity, and run a comprehensive validation suite tailored to the selected bridge standard. Results display a summary with pass/fail/warn counts and an overall status, detailed test cards showing each validation's outcome with supporting data, and a table of all tests. Use the report to identify format integration gaps, verify bridge compatibility, and ensure your message handling logic aligns with the bridge specification.

TECHNICAL MECHANISM

The analyzer uses ethers.js v5.7.2 to perform a multi-stage message format validation. First, it calls eth_getCode to verify the bridge contract is deployed and uses block explorer APIs to fetch verification status and source code. The tool then reads the current wallet state via BGWallet, capturing the connected address and chain ID for context. It analyzes the contract bytecode and ABI to detect message format patterns specific to the selected bridge standard—looking for message structures (sender, destination, payload fields), event emissions (MessageSent, MessageReceived), nonce or sequence tracking for replay protection, and format-specific encoding patterns. The tool also scans historical logs using eth_getLogs across the specified block range to identify cross-chain message events and delivery patterns. Each validation test evaluates a specific aspect of message format integration: contract deployment, wallet connectivity, message emission events, replay protection, and format-specific tests (e.g., Axelar Gateway message format, LayerZero LzApp format, Hyperlane message structure, Wormhole VAA format, Chainlink CCIP token validation, or custom format encoding). Results are compiled into a structured report with detailed diagnostic information and format-specific recommendations based on the selected bridge standard.

WHAT IT CANNOT SEE

This tool cannot actually validate cross-chain messages from external chains—it performs analysis of on-chain message formats only. It cannot access messages that have not been submitted on-chain or are pending delivery across chains. The tool is limited by the RPC provider's rate limits and block range availability for historical log queries. It cannot verify message authenticity or attestation without access to external chain state, proof data, or off-chain signatures. The analysis relies on the accuracy and completeness of contract verification and message format definitions; unverified bridges or incomplete ABIs may produce incomplete results. It cannot analyze bridges that are not verified or have opaque message encoding that deviates from the selected format specification. The tool cannot test message format compatibility with all target chains—only the deployed bridge contract on the current chain. It is limited to the specific bridge contracts and message formats that are accessible via RPC. It cannot guarantee that the contract's message validation logic matches off-chain requirements without manual review and cross-chain testing.

PLEASE NOTE

This is a read‑only analytics tool—it never submits transactions or relays messages. It is designed for EVM‑compatible chains and works best with verified bridge contracts. The validation results are for informational and audit purposes only and should not be considered a comprehensive security audit. Always manually review message format logic and perform actual cross-chain tests before relying on bridge integrations. The tool's pattern detection is heuristic and may miss custom format implementations or bridge-specific features. Select the correct message format specification for accurate validation results.