Contract Interface# Interfaces and protocols for contract interaction and data management. Calldata Encoding Types Format Application Binary Interface Method Calling Convention Call Key Special Methods Storage System Storage Architecture Default Derivation Algorithm Root Slot Contract Upgradability Upgrade Control Mechanism Locked Slots in Nested Calls Contract Major Version Contract Execution Flow Deployment and Calls Entry Kinds CallContract Semantics GVM32 (Base32) Alphabet Encoding Decoding Usage