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petejkim/testing-storage-slot-0.js

Created December 21, 2020 20:36
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USDC v2: Upgrading a $1.4B Token - Testing Storage Slot 0
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testing-storage-slot-0.js
// Storage slot 0 contains "owner" (address)
const data = await web3.eth.getStorageAt(contract.address, 0);
// Take the last 20 bytes, left-pad with zeros if needed
const ownerData = data.slice(-40).padStart(40, "0");
expect(ownerData).to.equal(
ownerAddress.slice(2).toLowerCase() // Remove "0x"
);
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