EIP-7002 EIP-7251 - Implement Withdrawal and Consolidation request types

[anvacaru]

Request Processing System Overhaul

• Changed deposit request cell type from List to Bytes and added withdrawal/consolidation request cells
• Implemented system call infrastructure using #systemCall rules.
• Added request validation logic with #validateRequestsRoot to verify that sha256 generated hash matches the one provided in the block header
• Updated #finalizeBlock rules to use a comprehensive #processGeneralPurposeRequests which:
  • 1. Goes through the <log> events and fetches deposit requests
  • 2. Does a system call to WITHDRAWAL_REQUEST_PREDEPLOY_ADDRESS and saves the output in <withdrawalRequests> cell.
  • 3. Does a system call to CONSOLIDATION_REQUEST_PREDEPLOY_ADDRESS and saves the output in <consolidationRequests> cell.

New Address Constants

• Added predeploy address constants for system contracts:
  • BEACON_ROOTS_ADDRESS, HISTORY_STORAGE_ADDRESS
  • WITHDRAWAL_REQUEST_PREDEPLOY_ADDRESS, CONSOLIDATION_REQUEST_PREDEPLOY_ADDRESS
• Added request type identifiers (deposit=b"\x00", withdrawal=b"\x01", consolidation=b"\x02")

Infrastructure Improvements

• Changed beacon/block history functions to InternalOp type
• Added Prague network support with CancunToPragueAtTime15k schedule
• Updated deposit data extraction with better binary parsing, using #asWord instead of Bytes2Int