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(** Tezos Protocol Implementation - Protocol Signature Instance *)

type validation_mode =
  | Application of {
      block_header : Alpha_context.Block_header.t ;
      baker : Alpha_context.public_key_hash ;
    }
  | Partial_application of {
      block_header : Alpha_context.Block_header.t ;
      baker : Alpha_context.public_key_hash ;
    }
  | Partial_construction of {
      predecessor : Block_hash.t ;
    }
  | Full_construction of {
      predecessor : Block_hash.t ;
      protocol_data : Alpha_context.Block_header.contents ;
      baker : Alpha_context.public_key_hash ;
    }

type validation_state =
  { mode : validation_mode ;
    chain_id : Chain_id.t ;
    ctxt : Alpha_context.t ;
    op_count : int ;
  }

type operation_data = Alpha_context.packed_protocol_data

type operation = Alpha_context.packed_operation = {
  shell: Operation.shell_header ;
  protocol_data: operation_data ;
}

include Updater.PROTOCOL
  with type block_header_data = Alpha_context.Block_header.protocol_data
   and type block_header_metadata = Apply_results.block_metadata
   and type block_header = Alpha_context.Block_header.t
   and type operation_data := operation_data
   and type operation_receipt = Apply_results.packed_operation_metadata
   and type operation := operation
   and type validation_state := validation_state