Transaction simulations powered by Tenderly

Most wallets ask you to sign first and understand later. A hex blob. A gas estimate. A leap of faith.

Wyro flips that. You see what the transaction will do before you sign — thanks to transaction simulations powered by Tenderly.

What “simulation” means here

A simulation is a dry-run of the exact transaction you’re about to approve. We send the call against current chain state (without broadcasting it) and read back the result: success or failure, and how your balances would change.

So instead of guessing from a contract name, you get a preview:

• Tokens out of your wallet
• Tokens in to your wallet
• Whether the call would revert before you pay for a failed send

That’s the same mental model as a bank preview — applied to onchain actions.

Why Tenderly

Building a reliable simulator across chains and contracts is hard. We use Tenderly as the simulation engine so Wyro can focus on clear UX: open the approval screen early, enrich it with balance changes as the sim completes, and never hide a failed or pending result behind a green “looks fine” button.

When simulation is still running or fails, Wyro asks you to acknowledge that — so you don’t approve blind by accident.

Where you’ll see it

Simulations power the approval flow across Wyro — swaps, sends, and dapp requests — on web, mobile, and browser extension. Same idea everywhere: review the predicted outcome, then sign with your keys.

What simulation is not

• It is not custody. Your keys stay yours.
• It is not a guarantee the mempool won’t move before inclusion — that’s why we also use slippage and price impact.
• It is the best look at “if this lands as built right now, here’s what happens to my balances.”

The bar we care about

1. You initiate an action
2. Wyro prepares the transaction
3. Tenderly simulation shows expected balance changes
4. You approve only when the preview matches your intent

Surprises belong in the review screen — not in your wallet after the fact.