Gasless Transaction Relay Submitter

WHAT IT DOES

Gasless Transaction Relay Submitter is a developer-focused tool that enables users to submit transactions without paying gas fees by routing them through a relay network. Unlike standard wallet submissions that require native currency for gas, this tool allows users to submit signed transactions to a relay endpoint, where the relay pays the gas cost and forwards the transaction to the network. It reads transaction relay status, checks gasless relay availability, estimates relay fees, verifies wallet balance, monitors relay endpoint health, and validates relay request eligibility. The tool supports Ethereum, Polygon, Arbitrum, Optimism, Avalanche, BNB Chain, and Base, providing a unified interface to submit gasless transactions across multiple networks. This is essential for users who want to interact with smart contracts without holding native currency, for onboarding new users, and for applications covering gas costs for their users.

HOW TO USE

Connect your wallet using WalletConnect or a compatible browser extension. Ensure your wallet is on the network where you want to submit the transaction. Enter the relay endpoint URL—this is the address of the gasless relay service you are using. Enter the target contract address, the call data in hex format, and the native value to send. Click "Check relay availability" to verify the relay endpoint is reachable and check its status. The tool displays the relay endpoint health, your wallet address, and the transaction details. If the relay is available, the "Submit gasless transaction" button appears. Click it to sign the transaction locally and submit it to the relay endpoint. The tool sends the signed transaction to the relay, which then forwards it to the network. The tool displays the relay response and the transaction hash if available.

ADAPTIVE RELAY ENDPOINT AVAILABILITY AND SUBMISSION ENGINE

The core technical mechanism that distinguishes this tool is its adaptive relay endpoint availability and submission engine. Unlike simple transaction broadcasters that only submit to public RPCs, this tool routes transactions through gasless relay networks with multiple validation layers. The engine first validates the relay endpoint by sending an OPTIONS or health check request, ensuring the endpoint is reachable and responding before attempting submission. It then constructs the transaction with the user's parameters, signs it locally using the wallet's signer, and serializes the signed transaction. The engine packages the signed transaction along with metadata (from address, target, value, chain ID) into a JSON payload and submits it to the relay endpoint via a POST request. The engine handles CORS and network errors gracefully, providing clear feedback if the relay is unavailable. All relay requests are wrapped with timeout and retry logic, and the tool automatically falls back to a secondary relay endpoint if the primary is unavailable.

WHAT IT CANNOT SEE

The tool cannot guarantee that gasless relay transactions will be processed if the relay network is unavailable, the relay endpoint changes its fee structure, the user's gasless request does not meet the relay criteria, or the relay infrastructure experiences downtime at the time of submission. It has no visibility into the relay's internal processing, mempool status, or fee calculation beyond what the relay endpoint reports. The tool cannot predict if the relay will accept the transaction or if the relay's gas policies will change between check and submission. It does not monitor transactions after submission—it is a submission tool, not a tracking service. The tool cannot interact with non-EVM chains, private networks, or relay endpoints that do not support the standard relay interface it expects.

PLEASE NOTE

This tool is designed exclusively for EVM-compatible blockchain networks. It supports Ethereum, Polygon, Arbitrum, Optimism, Avalanche, BNB Chain, Base, and similar chains. Non-EVM networks such as Solana, Cosmos, or Bitcoin are not supported. Always verify the relay endpoint before submitting sensitive transactions—the tool does not validate endpoint security or relay terms beyond basic availability. The tool provides estimates only—actual relay fees and processing are determined by the relay service. Users are responsible for understanding relay service terms, including the possibility that the relay may reject or fail to process the transaction.