TxGuard Studio — Interactive Web3 Transaction & Smart Contract Security Studio

Zero Blind Signatures: Decode Any Transaction 4-Byte Dissector

Paste any raw EVM calldata payload from MetaMask, Etherscan, or phishing prompts. TxGuard decodes method selectors, extracts 32-byte chunks, and translates complex contract calls into human-readable plain English before you sign.

Load Real Exploit Scenario

Raw EVM Transaction Calldata (Hex) Press Ctrl/Cmd + Enter to Decode

Judges can test custom hex payloads or select one of the real-world scenarios above.

approve approve(address spender, uint256 amount)

ERC-20 Allowance 68 Bytes (2 Words)

Plain-English Human Translation

Grants address 0x68b346... unlimited permission to transfer all of your tokens.

Decoded Function Arguments (ABI Parameters)

Parameter	Solidity Type	Role / Context	Decoded Value

In-Browser Solidity Security & Logic Auditor AST Static Engine

Inspect Solidity smart contracts for Reentrancy (CEI violations), insecure tx.origin authorization, non-standard ERC-20 return values, and MEV sandwich risks. Type your code, paste custom snippets, or drop a .sol file directly.

Select Vulnerability Scenario

Solidity Contract Workspace

Judges can type/modify contract code freely.

Security Health Score

60 / 100

WARNING

Audit Findings & Risk Invariants

1-Click Auto Remediation

Dynamic Transaction Execution & State Simulator State Delta Engine

Simulate state changes, gas costs, and token balance sheet deltas before sending transactions on-chain. Toggle attack vectors to witness reentrancy state corruption in real time.

CONFIRMED

Base Gas Price (Gwei) 28 Gwei

5 Gwei (Quiet) 150 Gwei (Congestion)

Max Slippage Bound 0.5%

0.1% (Strict) 10.0% (High MEV Risk)

Simulate Reentrancy Exploit

Simulates an untrusted contract hijacking execution via fallback.

Estimated Gas Fee

$10.77

0.00378 ETH (135,000 units)

State Transition Summary

Atomic transaction finalized within 0.5% maximum slippage bound.

Net Token Balance Sheet Delta

Asset	Flow	Delta	Counterparty / Recipient

Step-by-Step Execution Trace