Module backend

Foundry’s main executor backend abstraction and implementation.

Structs

• Backend
  Provides the underlying revm::Database implementation.
• BackendInner
  Container type for various Backend related data
• BackendStateSnapshot
  Represents a state snapshot taken during evm execution
• BlockchainDb
  A shareable Block database
• BlockchainDbMeta
  relevant identifying markers in the context of BlockchainDb
• CowBackend
  A wrapper around Backend that ensures only revm::DatabaseRef functions are called.
• EmptyDBWrapper
  An empty database that always returns default values when queried.
• Fork
  Represents a fork
• MemDb
  In-memory Database for Anvil.
• SharedBackend
  A cloneable backend type that shares access to the backend data with all its clones.
• StateSnapshot
  A minimal abstraction of a state at a certain point in time

Enums

• BackendDatabaseSnapshot
  Variants of a revm::Database
• BackendError
  Errors that can happen when working with revm::Database
• DatabaseError
  Errors that can happen when working with revm::Database
• RevertDiagnostic
  Represents possible diagnostic cases on revert
• RevertStateSnapshotAction
  What to do when reverting a state snapshot.

Constants

• GLOBAL_FAIL_SLOT
  bytes32("failed"), as a storage slot key into CHEATCODE_ADDRESS.

Traits

• DatabaseExt
  An extension trait that allows us to easily extend the revm::Inspector capabilities

Functions

• update_state
  Helper method which updates data in the state with the data from the database. Does not change state for persistent accounts (for roll fork to transaction and transact).

Type Aliases

• BackendResult
• DatabaseResult
  Result alias with DatabaseError as error
• FoundryEvmInMemoryDB
  Type alias for an in-memory database.
• LocalForkId
  Represents a numeric ForkId valid only for the existence of the Backend.