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// Copyright (c) The Libra Core Contributors // SPDX-License-Identifier: Apache-2.0 //! # The VM runtime //! //! ## Transaction flow //! //! This is the path taken to process a single transaction. //! //! ```text //! SignedTransaction //! + //! | //! +--------------------------|-------------------+ //! | Validate +--------------+--------------+ | //! | | | | //! | | check signature | | //! | | | | //! | +--------------+--------------+ | //! | | | //! | | | //! | v | //! | +--------------+--------------+ | //! | | | | //! | | check size and gas | | //! | | | +---------------------------------+ //! | +--------------+--------------+ | validation error | //! | | | | //! | | | | //! | v | | //! | +--------------+--------------+ | | //! | | | | | //! | | run prologue | | | //! | | | | | //! | +--------------+--------------+ | | //! | | | | //! +--------------------------|-------------------+ | //! | | //! +--------------------------|-------------------+ | //! | v | | //! | Verify +--------------+--------------+ | | //! | | | | | //! | | deserialize script, | | | //! | | verify arguments | | | //! | | | | | //! | +--------------+--------------+ | | //! | | | | //! | | | v //! | v | +----------------+------+ //! | +--------------+--------------+ | | | //! | | | +------------------->+ discard, no write set | //! | | deserialize modules | | verification error | | //! | | | | +----------------+------+ //! | +--------------+--------------+ | ^ //! | | | | //! | | | | //! | v | | //! | +--------------+--------------+ | | //! | | | | | //! | | verify scripts and modules | | | //! | | | | | //! | +--------------+--------------+ | | //! | | | | //! +--------------------------|-------------------+ | //! | | //! +--------------------------|-------------------+ | //! | v | | //! | Execute +--------------+--------------+ | | //! | | | | | //! | | execute main | | | //! | | | | | //! | +--------------+--------------+ | | //! | | | | //! | success or failure | | | //! | v | | //! | +--------------+--------------+ | | //! | | | +---------------------------------+ //! | | run epilogue | | invariant violation (internal panic) //! | | | | //! | +--------------+--------------+ | //! | | | //! | | | //! | v | //! | +--------------+--------------+ | +-----------------------+ //! | | | | execution failure | | //! | | make write set +------------------------>+ keep, only charge gas | //! | | | | | | //! | +--------------+--------------+ | +-----------------------+ //! | | | //! +--------------------------|-------------------+ //! | //! v //! +--------------+--------------+ //! | | //! | keep, transaction executed | //! | + gas charged | //! | | //! +-----------------------------+ //! ``` //#[macro_use] extern crate solana_libra_vm; #[macro_use] extern crate lazy_static; #[macro_use] extern crate rental; #[macro_use] extern crate mirai_annotations; #[macro_use] mod counters; #[cfg(feature = "mirai-contracts")] pub mod foreign_contracts; mod block_processor; mod frame; mod gas_meter; mod move_vm; mod process_txn; mod runtime; #[cfg(test)] mod unit_tests; pub mod code_cache; pub mod data_cache; pub mod identifier; pub mod loaded_data; pub mod txn_executor; #[cfg(feature = "instruction_synthesis")] pub mod execution_stack; #[cfg(not(feature = "instruction_synthesis"))] mod execution_stack; pub use move_vm::MoveVM; pub use process_txn::verify::static_verify_program; pub use txn_executor::execute_function; use solana_libra_config::config::VMConfig; use solana_libra_state_view::StateView; use solana_libra_types::{ transaction::{SignedTransaction, TransactionOutput}, vm_error::VMStatus, }; use solana_libra_vm::IndexKind; /// This trait describes the VM's verification interfaces. pub trait VMVerifier { /// Executes the prologue of the Libra Account and verifies that the transaction is valid. /// only. Returns `None` if the transaction was validated, or Some(VMStatus) if the transaction /// was unable to be validated with status `VMStatus`. fn validate_transaction( &self, transaction: SignedTransaction, state_view: &dyn StateView, ) -> Option<VMStatus>; } /// This trait describes the VM's execution interface. pub trait VMExecutor { // NOTE: At the moment there are no persistent caches that live past the end of a block (that's // why execute_block doesn't take &self.) // There are some cache invalidation issues around transactions publishing code that need to be // sorted out before that's possible. /// Executes a block of transactions and returns output for each one of them. fn execute_block( transactions: Vec<SignedTransaction>, config: &VMConfig, state_view: &dyn StateView, ) -> Vec<TransactionOutput>; }