TxSim: Transaction Simulator and Risk Detector for Polkadot

[EmmanuelEklipse]

Project Abstract

TxShield is a transaction simulator and risk detection tool designed to prevent failed transactions, gas waste, and honeypot scams by previewing potential risks before execution. Built for Polkadot using Next.js for the frontend, leveraging Node.js and the Polkadot.js API for backend transaction simulation and blockchain interactions. It uses custom WASM bytecode analysis for detecting risky contracts and integrates with wallets like Talisman and SubWallet to provide a seamless user experience. Targeting Polkadot’s rapidly growing ecosystem of 2+ million wallet users and aims to expand support across multiple parachains for broader coverage and safer transactions.

Grant level

• Level 1: Up to $10,000, 2 approvals
• Level 2: Up to $30,000, 3 approvals
• Level 3: Unlimited, 5 approvals (for >$100k: Web3 Foundation Council approval)

Application Checklist

• The application template has been copied and aptly renamed (project_name.md).
• I have read the application guidelines.
• Payment details have been provided (Polkadot AssetHub (USDC & DOT) address in the application and bank details via email, if applicable).
• I understand that an agreed upon percentage of each milestone will be paid in vested DOT, to the Polkadot address listed in the application.
• I am aware that, in order to receive a grant, I (and the entity I represent) have to successfully complete a KYC/KYB check.
• The software delivered for this grant will be released under an open-source license specified in the application.
• The initial PR contains only one commit (squash and force-push if needed).
• The grant will only be announced once the first milestone has been accepted (see the announcement guidelines).
• I prefer the discussion of this application to take place in a private Element/Matrix channel. My username is: @_______:matrix.org (change the homeserver if you use a different one)

[EmmanuelEklipse]

I have read and hereby sign the Contributor License Agreement.