What's the reason for subbing 1 after keccak256 the slot name? bytes32 internal constant PERPETUAL_V1_INITIALIZE_SLOT = bytes32(uint256(keccak256("dYdX.PerpetualV1.initialize")) - 1);

See: [image] EIP-1967: Standard Proxy Storage Slots If you have keccak256('eip1967.proxy.implementation') the preimage is known, it is 'eip1967.proxy.implementation'. If you subtract one you get a random number with unknown preimage because keccak256 is a cryptographic hash. …

Calculation of proxy contract storage slot

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frangio August 10, 2022, 4:27pm 2

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Calculation of proxy contract storage slot

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