SlotLibrary

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Storage Slot Strategy

• Based on EIP-7201
• Inputs include:
  • Contract name (contractName)
  • Human-readable name (name)
  • Version number (version)
• Final slot:
  keccak256(
  	abi.encode(
  		uint256(
  			keccak256(
  				abi.encodePacked(
  					"mellow.flexible-vaults.storage.",
  					contractName,
  					name, version
  				)
  			)
  		) - 1
  	)
  ) & ~bytes32(uint256(0xff));
  

• Namespacing: Prevents overlap between different modules (ShareModule, FeeManager, etc.)
• Instance separation: Multiple deployments with different names produce distinct slots
• Versioning: Upgrades can cleanly migrate to new versions without collision

​

Function

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getSlot(string contractName, string name, uint256 version) → bytes32

• contractName: Logical name of the module (e.g., "ShareModule")
• name: Instance identifier or label (e.g., "Mellow")
• version: Numeric version for versioned slot separation

• A bytes32 value representing the computed storage slot

bytes32 slot = SlotLibrary.getSlot("FeeManager", "Mellow", 1);