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Tenderly Simulator Onboarding

Tenderly – Simulating DeFi Transactions

Tenderly allows users to simulate Ethereum transactions off-chain before signing, ensuring full visibility into gas usage, state changes, and potential risk — without touching real funds.

Step 1: Sign Up and Access the Simulator​

Start by visiting Tenderly.co and signing up. After logging in:

  • Head to your project dashboard.
  • On the sidebar, select Simulator to access the transaction simulator interface.

Running Simulation

Step 2: Run a Transaction Simulation​

  • Paste a contract address into the Simulation panel.
  • Select the network (e.g., Ethereum Mainnet).
  • Enter or select a function and input parameters.
  • Optionally modify gas settings and block number.
  • Click Simulate to preview internal call trees, gas usage, emitted events, and storage diffs.

Why this matters: You’ll see what your transaction will actually do — before spending gas or exposing assets.

Use Cases​

  • Previewing DeFi actions like borrowing, supplying, or governance voting.
  • Debugging contract interactions in production-like conditions.
  • Detecting unexpected balance changes before finalizing a transaction.

Best for: Developers, power users, DAO participants.