YAB <> Herodotus

Setup

You need these installed:

• Bun
• Foundry

First make sure you:

• Copy the .env.example to .env and fill in the values.

  • Get the Herodotus API key from here.
  • You can get the RPC_URLs from Alchemy, Infura or any other provider.

• Run:

  bun i

Obtain Slot from Storage Layout

Using hardhat-storage-layout

bun storage-layout

Or tool like https://evm.storage/

If you want to get the storage layout for a deployed contract, just grab the address and check it there, but we will continue with the storage layout we got from the previous step.

Get In-Mapping Slot

The YAB slots we are interested in are a mapping. It requires additional steps to get the full slot.

mapping(bytes32 => struct YABTransfer.TransferInfo)

01-get-slots.ts

To test if the slots are correct, run:

bun test get-slots

Prove the Slot/s with Herodotus

02-prove-slots.ts

Note: This step doesn't have a separate run script, please move to the next step.

Access Proven Slots

03-access-slots.ts

Run the whole flow

bun start